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Патент USA US3090460

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May 21, 1963
3,090,443
J. H. BOSTOCK
WELL TOOLS
Filed Nov. 3, 1958
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INVENTOR
James H. Bosfock
Mag/W
ATTORNEY
BJlQ?AéB
Patented May 21, 1863
2
is movable to an open position by the pressure of well
3,990,443
?uids.
WELL TQOLS
James H. Bostock, Dallas, Tex, assignor to Otis Engineer
ing Corporation, Dalias, Ten, a corporation of Dela
ware
A further object of the invention is to provide a control
device adapted for use in the well ?ow conductor having
a movable valve element provided with a ?ow passage
Filed Nov. 3, 1958, Ser. No. ‘771,282
through which the ?uids flow when the valve element
23 Claims. (Cl. 166-224)
is in a lower open position in a housing, said housing
having a chamber for receiving a pressurized charge of
This invention relates to well tools and more particu
compressible gas, the valve element being provided with
larly to a pressure responsive ?ow control device for 10 a piston member exposed to the pressure of the charge
controlling the flow of ?uids through a ?ow conductor,
which tends to move the valve element to an upper closed
such as a well tubing.
position.
An object of the invention is to provide a new and
A still further object of the invention is to provide a
improved control device for use in a well ?ow conduc
control device wherein the piston member is also ex
tor which is responsive to the ?uid pressure within the 15 posed, when the valve element is in an open position, to
?ow conductor for controlling ?ow of ?uids therethrough.
the pressure of the ?uids of the well ?ow conductor
Another object of the invention is to provide a control
which tend to hold the valve element in an open position
dew'ce adapted for use in a well ?ow conductor which
against the forces exerted by the charge in the chamber.
has means arranged to be actuated by the pressure of the
A still further object of the invention is to provide a
?uids in the well conductor to automatically shut oil flow 20 flow control device wherein the piston member of the
through the conductor when the pressure of the ?uids
valve element is removed from exposure to the pressure
?owing through the ?ow conductor drops below a pre
of the well ?uids when the valve element is moved to a
determined value.
closed position.
Still another object of the invention is to provide a
Another object of the invention is to provide a control
control device adapted to be positioned or secured in a 25 device adapted for use in a well ?ow conductor for con
?ow conductor to shut oti ?ow of ?uids through such
well conductor when the pressure of the ?uids therein
drops below a predetermined value and which thereafter
can ‘be opened again to permit ?ow by an external means
inserted into the ?ow conductor.
A further object is to provide a control device for con
trolling the ?ow of well ?uids through a ?ow conductor
trolling the ?ow of well ?uids therethrough which is re
movably positionable in the well ?ow conductor.
Additional objects and advantages of the invention will
be apparent from a reading of the following description
30 of a device constructed in accordance with the invention,
and reference to the accompanying drawings thereof
wherein:
wherein the well ?uids are directed through a movable
FIGURE 1 is a view partly in elevation and partly in
valve element which is biased towards a closed position
section of the upper portion of a control device con
and which is moved to an open position by the pressure
structed in accordance with the invention;
of the well ?uids in the flow conductor.
FIGURE 2 is a view partly in elevation and partly in
A still further object of the invention is to provide, in
section of the lower portion of the control device shown
a device of the character described, means including a
in FIGURE 1; and,
resilient member for resisting movement of the valve ele
FIGURE 3 is a view, partly in elevation and partly
ment toward open position.
4:0 in section of an anchoring and sealing member located
A still further object of the invention is to provide an
in a well ?ow conductor which supports the control de~
improved device for controlling the ?ow of well ?uids
vice illustrated in FIGURES 1 and 2.
through a ?ow conductor wherein the well ?uids are di
Referring now to the drawing, the control device 10
rected through a ?ow passage in a movable valve element
for controlling the ?ow of well ?uids through a ?ow
which includes means ‘biasing the valve element toward a
conductor, such as the well tubing 12, includes an outer
closed position wherein ?ow of ?uids through the valve
tubular member 13 which comprises an upper sub 14, a
element is prevented and having means exposed to the
sleeve 15 threaded on the lower reduced end of the upper
pressure of the well ?uids when the valve element is in
sub, a connector sub 16 whose upper reduced portion
an open position whereby the pressure of the ?uids ?ow
17 is threaded in the lower end of the sleeve and a
ing through the valve element tends to keep the valve 50 tubular
skirt 18 threaded on the reduced lower portion
element in an open position against the force of the bias
19
of
the
connector sub 16. An equalizing sub 20 may
ing means as long as the pressure thereof does not drop
be connected to the upper end of the upper sub 14 by
below a predetermined value.
an externally threaded reduced portion 21 thereof which
Another object is to provide a control device for con
is
threaded in the enlarged upper bore of the upper sub 14.
trolling the ?ow of well ?uids through a well conductor
It will thus be apparent that the outer tubular member
wherein the means for holding the valve element in an
13 is composed of the upper sub 14, the outer tubular
open position to permit ?ow of well ?uids through the
sleeve 15, the connector sub 16 and the tubular skirt 18
?ow conductor is removed from the in?uence of the pres
and that the equalizing sub 20 may be considered an ex
sure of the well ?uids when the valve element moves to
a closed position.
60 tension of the outer tubular member 13.
A tubular valve element or valve sleeve 25 is disposed
Still another object of the invention is to provide a
for limited longitudinal movement in the outer tubular
control device for controlling the ?ow of well ?uids
through a ?ow conductor wherein externally operable
pressure equalizing means are provided for subjecting the
means which move the ?ow conductor to an open posi
tion to the pressure of the well ?uids in the ?ow con
ductor when the valve element is in its closed position.
Still another object of the invention is to provide a
?ow control device adapted for use in a well ?ow con
ductor which has a valve element biased towards the
closed position by a pressurized gas charge and which
member 13 being provided intermediate its ends with
an external annular recess 27 in which is disposed a
65 snap ring 28 which extends outwardly of the annular re
cess 27 and the external wall of the valve element or
sleeve 25 to engage an upwardly facing annular shoulder
30 of the connector sub 16 to limit downward movement
of the valve element 25 in the outer tubular member ‘13.
The valve element ‘25 is also provided with an enlarged
lower end 32 which provides an upwardly facing annular
seal shoulder 33 which is ‘adapted to engage the annular
spouses
3
.
downwardly and outwardly extending seat surface 35 of
4
A resilient spring 1185 is disposed in the compartment
91, de?ned by the upper end of the connector sub 16,
the lower end of the piston member 59, the sleeve 15
of the outer tubular member and the valve element 25,
and has its upper end bearing against the lower annular
surface 1% of the piston member 50 and its lower end
bearing against a stop ring 198 which rests on the upper
longitudinal bore 38 which extends through the upper
reduced end 17 of the connector sub 16. It will be ap
end of the valve element and with a plurality of circum
parent that the spring 105 biases the valve element up
ferentially spaced lateral ports '40 adjacent its lower end
wardly as well as the compressed charge of gas in the
communicating with the {bore 38 adjacent its lower end
compartment 91 below the piston member 50.
and with the exterior of the valve element 25. The lower
The upper end of the tubular valve element 25 tele
end of the sleeve is closed by the transverse’ wall 42.
scopes in the upper sub 14. The engagement of the
The connector sub 16 is provided with an internal
external surface 110 of the valve element and the in
annular recess 48 in which is disposed an ‘O-ring or
similar resilient annular sealing member 49 which seals 15 ternal annular wall surface 111 of the upper sub does
the connector sub ‘16 to limit upward movement of the
valve element in the outer tubular member 13. Engage
ment of the shoulder 33 with the seat surface 35 also pre
vents ?ow of ?uid therethrough.
The valve element of sleeve 25 is provided with a
between the connector sub and the valve element to pre
vent ?ow of ?uids therebetween.
An annular piston member 50 is rigidly connected to
the valve element 25, above the upper end of the con
nector sub 16 and below the lower end of the upper
sub 14 of the outer tubular member 13‘, by means of
a split ring 52 disposed in an annular external recess
53 of the valve element which projects outwardly of the
annular recess 53 and of the external wall of the valve
element. The split ring '52 is received in an annular up
wardly opening recess of the piston member 50 which
provides an upwardly facing annular stop shoulder 54
which abuts the lower protruding edge of the split ring.
not constitute a ?uid or a gas tight seal, sothat the
?uids which may lbe present in the bore 112 of the
outer tubular member and in the bore 38 of the valve
element may ?ow into the annular cylindrical space 113
between the valve element and the sleeve 15 and be
tween the piston member 59 and the lower end of the
upper sub 14, whereby the pressure of the fluids ?owing
through the control device 10 acts upon the piston mem
ber ‘55 to tend to move the piston member, and there
fore the valve element, downwardly against the force
of the spring 195 and of the pressurized charge of gas
in the compartment 91 toward the lower position illus
trated in FIGURE 1 when the pressure of the well ?uids
is communicated to the bore 38 of the valve elements
A set screw 56 threaded in a suitable bore of the annu
lar piston member 50 extends theret-hrough into an 30 and to the longitudinal bore 112 of the outer tubular
member 13 above the piston member 50. This occurs
aligned aperture 58 of the split ring to prevent relative
when the \wave element 25 is in the lower position illus
movement between the snap ring and the piston member
trated in FIGURES 1 and 2 and the lateral ports 41}
and, therefore between the piston member and the valve
thereof are open or when the valve element is in its
element.
35 upper closed position if the lateral port 12% of the
The piston member is provided with internal and exter
nal annular recesses 60 and 61, respectively, in which are
disposed ‘O-rings or seal members 62 and 63 which seal
between the piston member and the valve element ‘and
‘between the piston member and the sleeve 15, respectively.
The connector sub 16 is provided with a similar external
annular recess 65 in which is disposed an 'O-ring or
similar annular resilient sealing member 66 which seals
between the connector sub and the lower end of the
sleeve 15.
In addition, a copper gasket 68 is disposed between
the lower end of the sleeve 15 and the upperwardly fac
ing shoulder 89 of the connector sub whereby a ?uid
and gas tight seal is obtained between the connector sub
and the threaded sleeve so that a cylindrical chamber
equalizer sub 29 is open.
The port 129 of the equalizer sub 20 is normally
closed by a valve 121 which engages the annular valve
seat 122 of the equalizer sub due to the action of the
spring 124. The opposite ends of the spring bear against
the annular shoulder 125 of the valve 121 and the an
nular shoulder 126 of the spring retainer cage 127
threaded in an enlarged bore 128 of the equalizing sub
2%. The ?ow control device ‘10 and the equalizing sub
are adapted to be ‘positioned or mounted within the flow
conductor or well tubing 12 by any suitable means or
in any suitable manner but, as illustrated in FIGURE 3,
they may be connected to the lower end of the hanger
and sealing tool 135 which is adapted to be locked in
a landing nipple 136 connected in and constituting a sec
or piston compartment 91 is formed between the piston 50 tion of the well tubing 12. The landing nipple has an
member '50 and the connector sub 16.
internal annular recess 137 which provides a downwardly
Gas under pressure may be introduced into the piston
and inwardly extending, downwardly facing shoulder 138
compartment 91 between the piston member 50 and the
and also has a sealing surface 140 positioned below the
connector sub 16 through a transverse port 94 of the
locking
recess 137.
connector sub whose outer end communicates with an
The hanger and sealing tool 135 includes an inner
enlarged threaded bore '95 and with an angularly out
tubular mandrel 142 having an upper neck section 143,
wardly extending port 96 which extends from the ex
an expander section 144 connected to the lower end of
terior of the connector sub to the enlarged bore 95.
the neck section and a seal section 145 connected to
A plug 98 is threaded in the enlarged bore 95 and is
provided with a gasket 109 at its inner end which bears 60 the lower end of the expander section 144.
The seal section 145 is provided with an external
against the annular shoulder 11011 to seal the bore 94
annular ?ange 147 which provides an upwardly fac
and thus prevent ?ow or escape of compressed gas from
ing shoulder 143 and a downwardly facing shoulder 149.
the compartment 91 when the plug 98 is threaded into the
Any suitable seal assembly 151 may be mounted on the
enlarged bore 95 and compresses the gasket 100 against
65 seal section 145 and is held in position against the
the annular shoulder 101.
7 Conversely, when the plug 98 is unscrewed, a com—
upwardly facing annular shoulder 148 by the lower an
pressed gas under pressure may be introduced through
nular end surface 153 of the expander section 144 which
the ports 96 and 94 into the interior of the connector
is threaded on the upper end of the seal section 145.
sub and thence upwardly between the outer wall of the
A similar sealing assembly 155 is mounted on the seal
valve element and the inner wall of the connector sub 70 section 145 below the ?ange 147 thereof and is held
to the compartment 91. The snap ring 28 does not, of
against the downwardly facing shoulder 149 of the ex
course, provide a ?uid or gas tight seal between the
ternal ?ange 147 by the upper surface of a retainer nut
connector sub and the valve element so that it does
not impede the flow of gas into or out of the chamber
or ring 156 threaded on the lower end of the seal sec
tion. The equalizing sub 20 is threaded on the lower
91 through the ports 94 and 96 of the connector sub. 75
it”
5
3,090,443
end of the seal section 145 of the tubular member 142
of the hanger and sealing tool 135.
the ports 96 and 94 of the connector sub 17, after which
the plug 95 is rotated to seal the port 96. The valve
element 25 is then in its upper closed position with the
ports 40 closed due to the sealing engagement of the
seal surfaces 33 and 35 of the valve element 25 and the
The expander section 1411 is provided with a down
wardly and outwardly extending surface 161} which is
arranged to coact with the dogs 161 suspended from a
dog carrier sleeve 162 longitudinally slidably mounted
outer tubular member 13 of the ?ow control device.
on the upper neck section 143 of the tubular mandrel
142. The hanger and sealing tool 135 may be of the
The assembly is then inserted into the conventional
lubricator (not shown) which is connected to the upper
type illustrated and described in the patent to H. C. Otis,
2,144,850.
The locking and sealing tool 135 may be lowered
10
through the well tubing to the landing nipple 136 by
end of the well tubing 12 in the usual manner.
The valve of the lubricator above the assembly thus
introduced thereinto is closed and the valve of the lubri
cator below the assembly is opened so that the assembled
control device may pass downwardly into the well tubing
means of any suitable running tool which holds the
dog carrier sleeve 162 in an upper position on the neck
12, the tubing thus being closed against ?ow of well
section 143 of the inner tubular mandrel 142 so that
15 ?uids from its upper end.
the dogs 161 are positioned above the expander surface
The well ?uids may ?ow upwardly past the exterior of
160 and therefore may pass through the tubing into the
the hanger and sealing tool 135 since the seal assemblies
landing nipple until the carrier sleeve shoulder 162a
151 and 155 thereof do not engage the Walls of the
engages the upper end of the landing nipple and the
bosses 170 of the dog are aligned with the locking re
cess 137 of the landing nipple.
Upwardly acting forces are then applied to the tubu
lar member 142 of the hanger and sealing tool 135 to
cause it to move upwardly relative to the dog carrier
sleeve 162 and to the dogs 161 whereby the expander
25
surface 166 engages the internal surfaces 171 of the dogs
tubing 12, and thence through the upper end of the
tubular mandrel 142 thereof and the bore 175 of the
equalizing sub into the bore 112 of the outer tubular
member 13 above the piston member 50. If the pressure
of the well ?uids is above the predetermined value, such
?uids ?ow between the external and internal surfaces
110 and 111 of the valve element and of the upper
sub 14, respectively, to exert their pressure against the
and cams the dogs outwardly into expanded position in
upper end of the piston member 50 of the valve element
the locking recess of the landing nipple 136. In this
and move the valve element downwardly against the
position of the hanger and sealing tool 135 in the land
ing nipple, the seal assemblies 151 and 155 engage the 30 combined forces of the spring and of the charge in the
compartment 91. As a result, the valve member moves
seal surface 140 of the landing nipple and thus pre
to
the lower open position illustrated in FIGURE 1.
vent ?ow of ?uids between the tubular mandrel 142 and
The
assembly is then lowered through the well tubing
the landing nipple 136 so that any upward ?ow of well
and through the landing nipple 136 thereof until the
?uids through the well tubing 12 may take place only
shoulder 162a of the carrier sleeve engages the upper
through the lateral ports 49 of the valve element 25 into
the bore 38 thereof, thence through the bore 112 of
35 end of the landing nipple and the bosses 170 of the dogs
161 of the tool 135 are aligned with the annular locking
recess 170 of the landing nipple whereupon upward forces
the bore 175 of the equalizing sub 20 and thence through
are imparted to the tubular mandrel 142 of the hanger
the bore 176 of the inner tubular mandrel 142 of the
and sealing tool 135 to move the tubular mandrel up
locking and sealing tool 135.
110 wardly relative to the dogs to cause the expander mem
It will thus be apparent that the ?ow control device
ber 144 to cam the dogs outwardly whereby the bosses
10 will prevent ?ow of ?uids through the well tubing
the outer tubular member 13 of the control device to
170 of the dogs move into the locking recess 137 to pre~
12 when its valve element 25 is moved to its upper posi
tion wherein the ports 41} are closed due to the engage
ment of a seal surface 33 and seat surface 35 of the
valve element and ‘of the connector sub 16 of the flow
vent longitudinal displacement of the hanger and sealing
tool in the landing nipple. The control device 10 is
therefore locked in the tubing in its open position.
control device 10. As will be explained below, flow of
well ?uids from the well tubing below the hanger and
sealing well tool 135 may also take place through the
of the well ?uids which act on the upper end of the
122 for a purpose to be described below.
bined forces of the spring 105 and of the compressed
The control device is maintained open by the pressure
piston member 50 to maintain the valve element in its
lower open position. In the event the pressure of the
port 120 of the equalizing sub 20 when a suitable tool
is inserted through the bore 176 of the tubular member 50 well ?uids in the well tubing drops below the predeter
mined value due to excessive withdrawal of the well
142 into the bore 175 of the equalizing sub to move
?uids from the upper end of the well tubing, the com
the valve 121 outwardly out of engagement with its seat
gas charge in the compartment 91 move the valve member
When it is desired to control the ?ow of well ?uids
through the ?ow conductor or well tubing 12 to shut off 55 25 upwardly to its closed position wherein the ports 40
are closed so that the ?uid below the control device 10
flow whenever the pressure in the well tubing falls below
cannot ?ow upwardly therethrough and through the bore
a predetermined value for any reason, for example if
176 of the locking and seal tool 135. Even should the
excessive ?ow of well ?uids from the ?ow conductor is
pressure of the well ?uids below the control device 10
permitted by the failure of ?ow conductors or of the ?ow
control equipment (not shown) at the surface of the
well, the ?ow conductor device 10 is installed in the well
tubing below the surface. The ?ow control device 10 is
connected to the lower end of the equalizing sub 20 in
now increase above the predetermined value, such in
creased pressure cannot exert any in?uence on the piston
member 50 of the valve member 25 to again move it
downwardly, since the ports 40 are now closed, which
prevents communication of the ?uid pressure from below
the manner illustrated in FIGURE 1 by the threaded
connection between the upper sub 14 and the lower 65 the control device into the bore 38 thereof, and since
the seal assemblies 151 and 155 of the tool 135 prevent
reduced end 21 of the equalizing sub 20. The equaliz
communication
of such ?uid pressure from below the
ing sub 20 in turn is connected to the lower threaded
lliargger and sealing tool 135 to the upper end of the bore
end of the seal section 145 of the tubular mandrel 142
of the locking and sealing tool 135. The ?ow control
If it is desired to again cause the ?ow control device
device 10 may then be preset to close to prevent ?ow of 70
10
to open to permit upward ?ow of the valve ?uids
the well ?uids through the well tubing 12 whenever the
therethrough
to the surface, a suitable tool may be in—
pressure of the well ?uid in the well tubing 12 falls below
serted through the lubricator, in the manner described
a predetermined value by introducing a predetermined
charge of gas under pressure into the chamber 91 through 75 above, into the tubing and through the bore 176 of the
hanger and sealing tool 135 into the equalizing sub 20
3,090,443
7
to move‘ the valve 121 outwardly against the force
exerted by its spring 124 and also against the force
exerted by the pressure of the well ?uids below the seal
members 151 and 155. When the valve 121 is open,
the ?uid pressure of the well ?uids below the locking
and sealing tool 135 is again communicated to the cham
ber v113 above the upper end of the piston member 50
whereby it the ?uid pressure is above the predetermined
value, the valve element 25 again moves downwardly to
the open position illustrated in FIGURE 2. The equaliz
ing valve 121 may then be allowed to close but the
valve element 25 will remain in its lower open position
for the pressure of the well ?uids below the hanger and
sealing tool 135 is again communicated to the chamber
113 above the piston member 59 through the lateral
ports 49 and the bore 38 of the valve member and the
bore 112 of the outer tubular member 13. Of, if desired,
extraneous ?uid pressure may vbe introduced into the
tubing at the well surface to raise the pressure above the
control device to a value in excess of the predetermined
pressure at which the valve opens to cause opening of
the valve.
8
movable downwardly to its open position by ?uid pressure
when su?icient ?uid pressure is admitted into the upper
end of the bore 112 of the outer tubular member.
It will further ‘be seen that the outer tubular member and
the valve element provide a compartment in which a pre
determined charge of gas under pressure may be injected
to bias the valve element to its upper closed position
whereby the value of the ?uid pressure within the tubular
member above the valve element neccessary to move the
valve element downwardly towards its open position may
be selectively predetermined by predetermining the amount
of charge injected into the chamber 91.
It will further be seen that the ?ow control device may
be provided with resilient means which also bias the valve
element toward its closed position in the tubular member.
It will further be seen that the equalizing sub 20, the
outer tubular member 13 and the tubular mandrel 142 of
the (locking and sealing tool 13-5 constitute a single tubular
member which is provided with sealing means for sealing
between such tubular member and a well tubing when
such tubular member is positioned in a predetermined loca
tion'in the well tubing.
It will further be seen that such tubular member is.
In the event that, when the assembly of the locking and
seal tool 135, the equalizing sub 'Zil and the ?ow control
provided'with a pressure equalizingvalve below the sealing
landing nipple until the hanger and sealing tool is posi~
suitable tool into the well tubing from the surface through
device 10 is moved into the lubricator and thence to the 25 means 151 and 155 thereof so that the pressure of the well
?uids in the well tubing below the sea-ling means may be
well tubing above the landing nipple 136, the pressure
communicated to the upper portion of the bore 112 of the
of the well ?uids in the well tubing is below the predeter
tubular member above the valve element by externally
mined value even after the valves which permit ?ow of
operable means to cause the valve element to again move
well ?uid from the upper end of the well tubing are
downwardly to its open position.
closed, the valve element 25 remains in its upper closed
It will further be seen that the flow control device 10,
position in the outer tubular member while the control
once it has closed, may be opened by the insertion of a
device is being moved through the well tubing to the
tioned as illustrated in FIGURE 3 to hold the equalizing
sub and the control device 10 in the well tubing.
the usual lubricator to open the valve 121 after the pres
sure in the well tubing has again risen above the prede
termined value. Or, if desired, su?icient ?uid pressure
The well tubing is shut in until the pressure of the well
has increased above the predetermined value whereupon
may be introduced from an extraneous source into the
a tool is run in, in the manner described above, through
the lubricator, the well tubing 12 and the bore 176 of the
tubing above the ?ow control device to a value in excess
tubular mandrel 142 of the hanger and sealing tool 135
into the vbore 175 of the equalizing sub 2% and is then
operated to move the valve 121 outwardly, whereupon the
pressure of the well ?uids below the sealing assemblies
151 and 155 will be communicated through the bore 175
of the equalizing sub, the bore 112 ‘of the chamber 113‘
above the upper end of the piston member 50‘ and will
thus force the valve element downwardly against the
combined forces of the spring 1015 and of the char e in
the compartment 91. The equalizing valve actuating
tool is then removed from the well tubing and the well
?uids are permitted to ?ow out of the well tubing until the
pressure of the Well ?uids in the well tubing falls below
the predetermined value in which case the valve element
is again moved upwardly to close the valve tubing to pre—
vent further flow of well ?uids through the well tubing
and will remain in its upper closed‘ position until the
equalizing valve 121 is again opened after the pressure in
the vwell tubing has again increased above the predeter
mined value.
It will now be seen that a new and improved ?ow con
trol device has been illustrated and described which in
cludes an outer tubular member 13;v which is positionable
in the Well tubingland that sealing means are provided to
prevent ?ow of well ?uid past the outer tubular member
well tubing at the surface to raise the pressure in the
of the predetermined pressure at which the valve will
open.
The foregoing description of the invention is explana
tory only, and changes in the details of the constructions
illustrated may be made by those skilled in the art,
within the scope of the appended claims, without depart
ing ?rom the spirit of the invention.
What I claim and desire to secure by Letters Patent is:
1. A well ?ow control device including: an outer tu
bular member; a valve member movably mounted in the
said tubular member for longitudinal movement therein
and having a longitudinal ?ow passage formed therein;
means sealing between said tubular outer member and
said valve member, said ?ow passage of said valve mem
ber communicating with the interior of the tubular outer
member above and below said seal means; means on said
outer tubular member below said seal means and on said
valve member below said flow passage engageable upon
movement of said valve member longitudinally of said
outer member to close off flow of ?uids through said
valve member; biasing means in said outer member en
gaging said valve member and biasing said valve member
toward such closed position, said valve member having
an area thereon exposed to the pressure of ?uids ?owing
It will further be seen that the outer tubular member
through said valve member, said pressure of ?uids ?ow
ing through said valve member acting on said area of
said valve member against said force exerted by said
13 is provided with a longitudinally movable valve element
25 which, when it is in its upper position, prevent-s ?ow
of well ?uids. through the outer tubular member and
which, when it is in its lower position, permits such ?ow
of well ?uids through the tubular member 13‘ and thus
through the well tubing past the sealing means.
position, pressure of ?uids upstream of said valve acting
and the well tubing.
.
It will further be seen that the flow control device is
provided with means for biasing the valve member toward
its upper closed position and that the valve element is
biasing means to move said valve member longitudinally
in said outer member to a position opening said passage
of said valve member to permit ?ow therethrough, said
area of said valve member being downstream of the valve
means whereby when said valve member is in closed
on said valve member coacts with said biasing means to
hold said valve member in closed position.
2. A well ?ow control device including: a tubular
3,090,443
member; a valve element movably mounted in said tubu
10
said tubular member whereby said valve means may be
lar member for controlling upward ?ow of ?uids through
moved to open said ?ow passage by means of an exter
said tubular member; means in the tubular member bias
nally operable means insertable into said tubular mem
ber to engage said exposed portion of said valve means.
7. A well ?uid control device including: a tubular
member; a valve element having a longitudinal ?ow pas
sage therein moveably mounted in said tubular member
ing said valve element longitudinally upwardly in said
tubular member to a closed position in the tubular mem
ber Wherein it prevents ?ow of ?uids through the tubular
member; means on said tubular member and said valve
element engageable to close 01f ?ow of ?uids upwardly
for controlling upward ?ow of ?uid through said tubu
through said tubular member; and means on said valve
lar member; means on said tubular member and said
element exposed to and responsive to ?uid pressure of 10 valve element engageable to close off ?ow of ?uids
the ?uids ?owing past the tubular valve member and
within the tubular member immediately above the valve
element for moving the valve element longitudinally
downwardly in said tubular member to separate said
through said tubular member and said flow passage of
said valve element; means in the tubular member biasing
said valve element upwardly to an upper position in the
tubular member wherein said means on said tubular
means on said tubular member and valve element and 15 member and said valve element are engaged to prevent
move said valve element to an open position against the
?ow of ?uids through the tubular member; and upward
resistance of said biasing means when the ?uid pressure
ly facing surface means on said valve element exposed to
acting downwardly on said means on said valve element
and responsive to ?uid pressure of ?uids ?owing upward
exposed to and responsive to ?uid pressure exceeds a pre
ly past said valve element within the tubular member
determined value to permit upward ?ow of ?uids through
said tubular member.
3. A well ?ow control device of the type set forth in
claim 2 including: means providing a lateral ?ow passage
from the exterior to the interior of said tubular member
above said longitudinally movable valve element; and
immediately above the valve element for moving the
valve element downwardly ‘to an open position against the
resistance of said biasing means when said ?uid pressure
above said valve element exceeds a predetermined value
to permit upward ?ow of ?uid through said tubular mem
ber, such downward movement of said valve element
separating said means on said tubular member and said
valve element to open the same to ?ow therethrough;
said ?ow passage of Said valve element comprising a
valve means for said lateral ?ow passage normally biased
to a closed position for preventing ?ow of ?uids from
the exterior to the interior of the tubular member, said
valve means having a portion thereof exposed in the bore
longitudinal upward opening ‘bore and a lateral port adja
of said tubular member whereby said valve means may 30 cent the lower end of said ‘bore, said port being closed
be moved to open said ?ow passage by means of an ex
ternally operable means insertable into said tubular mem—
her to engage said exposed portion of said valve means.
4. A well ?ow control device of the character set forth
against ?ow of well ?uids upwardly therethrough into
the ?ow passage of the valve element when the valve
element is in its upper position in the tubular member
and said means on said tubular member and said valve
in claim 2, including: hanger and sealing means on said 35 element are engaged.
tubular member for holding said tubular member in a
8. A well ?ow control device of the type set forth in
predetermined position in a well ?ow conductor and for
claim 7 including: means providing a lateral ?ow passage
sealing between the tubular member and the Well ?ow
from the exterior to the interior of Said tubular member
conductor whereby ?ow of ?uids in the well conductor
above said longitudinally movable valve element; and
are directed through such tubular member.
40 valve means for said lateral ?ow passage normally biased
5. A well ?ow control device including: a tubular
to a closed position for preventing ?ow of ?uids from
member; a valve element movably mounted in said tubu
the exterior to the interior of the tubular member, said
lar member for controlling upward ?ow of ?uids through
valve means having a portion thereof exposed in the
said tubular member; said valve element having a longi
bore of said tubular member whereby said valve means
tudinal ?ow passage formed therein; means on said tubu
may be moved to open said ?ow passage by means of
lar member and said valve element engageable to close
an externally operable means insertable into said tubular
o? ?ow of ?uid through said tubular member and through
member to engage said exposed portion of said valve
said valve element when said means are engaged; means
means.
in the tubular member biasing said valve element up
wardly to an upper position in the tubular member where
9. A well ?ow control device including: a tubular
member; a valve element having a longitudinal flow pas
in said means on said tubular member and said valve
sage therein providing for ?ow of ?uids therethrough and
element are engaged to prevent ?ow of ?uids through
movably mounted in said tubular member for controlling
the tubular member; and upwardly facing surface means
upward ?ow of ?uid through said tubular member; clos
on said valve element exposed to and responsive to ?uid
ure means on said tubular member and said valve ele
pressure of ?uids ?owing upwardly past said valve ele 55 ment coengageable to close off ?ow through said ?ow
ment within the tubular member immediately above the
passage and said tubular member; means in the tubular
valve element for moving the valve element downwardly
member biasing said valve element upwardly to an upper
to an open position against the resistance of said biasing
position in the tubular member wherein said valve clos
means when the ?uid pressure exceeds a predetermined
ure means are engaged to prevent ?ow of ?uids upward
value, such downward movement of the valve element 60 ly through the tubular member; and upwardly facing sur
separating said means on said valve element and said
face means on said valve element exposed to and respon
tubular member to permit upward ?ow through said ?ow
sive to ?uid pressure of ?uids ?owing upwardly past said
passage of said valve element and through said tubular
valve element within the tubular member immedi
member; said tubular member being provided with seal
ately ‘above and downstream of the Valve element for
means for sealing between said tubular member and a 65 moving the valve element downwardly to an open posi
?ow conductor in which said control device is adapted to
tion separating said valve closure means against the re
be located to control ?ow of ?uids therethrough.
sistance of said baising means when said ?uid pressure
6. A well ?ow control device of the type set forth in
above said valve element exceeds a predetermined value
claim 5 including: means providing a lateral ?ow passage
to permit upward ?ow of ?uids through said tubular
from the exterior to the interior of said tubular member 70 member, said tubular member being provided with seal
above said longitudinally movable valve element; and
means for sealing between said tubular member and a
valve means for said lateral ?ow passage normally biased
?ow conductor in which said control device is adapted
to a closed position for preventing ?ow of ?uids from the
to be located to control ?ow of ?uids therethrough, said
exterior to the interior of the tubular member, said valve
longitudinal ?ow passage of said valve element com~
means having a portion thereof exposed in the bore of 75 prising a longitudinal upward opening bore and a lateral
3,090,1i43
11
12
port adjacent the lower end of said bore, said'closure
means being engaged to close off said ?ow passage against
?ow of well ?uids'upwardly therethrough into the ?ow
said valve element exposed ‘to and responsive to ?uid pres
sure of ?uids ?owing upwardly through the ?ow passage
passage of the valve element when the valve element is
in its upper position in the tubular member.
10. A well ?ow control device of the type ‘set forth in
claim 9 including: means providing a lateral ?ow passage
ately above the valve element for moving the valve ele
ment downwardly to an open position against the resist
ance of said biasing means when the ?uid pressure exceeds
a predetermined value, such downward movement of the
of the valve element within the tubular member immedi
from the exterior to the interior of said tubular mem
valve element separating said valve closure means on said
ber above said longitudinally movable valve element;
and valve means for said lateral ?ow passage normally
biased to a closed position for preventing ?ow of ?uids
from the exterior to the interior of the tubular member,
said valve means having a portion thereof exposed in
the bore of said tubular member whereby ‘said valve
Valve element and said tubular member to permit ?ow of
?uids upwardly through the tubular member and said
valve element.
'15. A well tool for a well ?ow conductor including:
an elongate outer member having a longitudinal bore
lar member to engage said exposed portion of said valve
member and the well ?ow conductor whereby ?ow of
?uids in the well conductor may occur only through such
therein; hanger and sealing means on said outer member
means may be moved to open said flow passage by means 15 for holding the outer member in a predetermined position
of an externally operable means insertable into said tubu
in a well ?ow conductor and for sealing between the outer
means.
11. A well tool for a well ?ow conductor including:
an elongate outer member having a longitudinal bore
therein; hanger and sealing means on said outer member
bore of the outer member; a valve element having a
longitudinal ?ow passage mounted in said ‘bore of the
‘outer member for limited longitudinal movement between
a ?rst closed position and a second open position, said
valve element and said outer member having valve closure
means thereon engaged when said valve element is in said
?rst position for closing said ?ow passage of said valve
element and separated to permit ?ow through said valve
element and said ‘outer member when said valve element
for holding the outer member in a predetermined posi
tion in a well ?ow conductor and for sealing between
the outer member and the well ?ow conductor whereby
?ow of ?uids in the well conductor may occur only
through such bore of the outer member; a valve element
for ‘controlling upward ?ow of ?uids through said well
tool, said valve element having a "longitudinal ?ow pas
sage therethrough and being mounted in said bore of
is in its second position to permit upward ?ow of ?uids
through the well tool, said valve element having upwardly
the outer member for limited longitudinal movement be 30 facing surface means exposed .to and responsive to fluid
tween an upper closed position and a lower open posi
pressure of ?uids ?owing upwardly through 'the ?ow pas
tion, said valve element and said outer member having
sage of the valve element within the outer member imme~
valve closure means thereon engageable when said valve
dia-tely above the valve element for moving said valve
element is in the upper position in said outer member
element to said second position when the ?uid pressure
for closing said ?ow passage of said valve element and
acting on said upwardly facing surface of said valve ele
disengaged when said valve element is in said lower
ment exceeds a predetermined value; and means in said
position in said outer member to permit upward ?ow
outer member biasing said valve element longitudinally
of fluids through the Well tool, said valve element having
therein to said ?rst position closing said ?ow passage of
an upwardly facing surface thereon exposed to and re
said valve element when the ?uid pressure acting on said
sponsive to ?uid pressure of ?uids ?owing upwardly
through said valve element within the outer member im
mediately above said valve element and acting on said
upwardly facing surface, said valve element being moved
downwardly to open position when said ?uid within said
outer member above said valve element increases ‘above
a predetermined value, said valve element being movable
upwardly to ‘said closed position when the ?uid pres
sure within the outer member immediately above said
valve element acting on said upwardly facing surface
thereon decreases below a predetermined value; and
means in said outer member biasing said valve element
longitudinally upwardly therein to said closed position
when said ?uid pressure acting on said upwardly facing
surface decreases below said predetermined value.
upwardly facing surface of said valve element decreases
below said predetermined value.
16. A well tool for a well ?ow conductor including:
an elongate outer member having a longitudinal bore
‘therein; hanger and sealing means on said outer member
45 for holding the outer member in a predetermined position
in a well ?ow conductor and for sealing between the outer
member and the well ?ow conductor whereby ?ow of
?uids in the well conductor may occur only through such
bore of the outer member; a valve element having a longi
tudinal flow passage and a lateral passage communicating
with said longitudinal ?ow passage and the exterior of
said valve element, said valve element being mounted in
said bore of the outer member for limited longitudinal
movement between a ?rst position and a second open posi
55 tion, said valve element and said outer member having
closure members thereon engaged when said valve element
is in said ?rst position for closing said lateral ?ow passage
of said valve element to prevent ?ow of ?uids upwardly
through said outer member and said ?ow passages of said
60 valve element, said closure members of said valve element
and said outer member being disengaged when said valve
12. A well tool of the character set forth in claim 11
wherein said valve closure means comprises an upward
ly facing seat surface on said valve element below said
?ow passage and a downwardly facing seat surface on
said outer member.
13. A well 1001 of the character set forth in claim 11
wherein said outer member is provided with a seal means
for sealing between said outer member and a ?ow con
ductor in which said control device is adapted to be lo
cated to direct the ?ow of ?uids through said well tool.
14. A well ?ow control device including: a tubular
65
member; a valve element having a longitudinal ?ow pas
sage therein movably mounted in said tubular member;
valve closure means on said tubular member and said
element is in its second position to permit upward ?ow
of ?uids through the well tool, said valve element having
upwardly facing surface means exposed to and responsive
to the ?uid pressure of ?uids ?owing upwardly through
the valve element within said outer member immediately
above said valve element for moving said valve element
to said second open position when the ?uid pressure ex
valve element coengageable to close off the ?ow of ?uids
upwardly through said tubular member and said flow 70 ceeds a predetermined value, said valve element and said
outer member having external and internal ?anges, re
passage of said valve element; means in the tubular mem
spectively,
and seal members on said ?anges sealing be
ber biasing said valve element upwardly to an upper posi
tween said ?anges and the valve element and said outer
tion in the tubular member wherein said valve closure
member, respectively, said ?anges and seal members de?n
means are engaged to prevent ?ow of ?uids through the
tubular member; and upwardly facing surface means on 75 ing a ?uid tight chamber between said outer member and
13
3,090,443
said valve member for receiving a predetermined charge
of compressible gas, said charge biasing said valve ele
14
communicating with said longitudinal ?ow passage of the
exterior of said valve element, said valve element being
ment toward its second position.
moune'd in said bore of the outer member for limited
17. A well tool for a well ?ow conductor including:
longitudinal movement between an upper closed position
an elongate outer member having a longitudinal bore
and a lower open position, closure means on said outer
therein; hanger and sealing means on said outer mem
member and on said valve element below said longi
ber for holding the outer member in a predetermined
tudinal flow passage, said closure means being engaged
position in a well ?ow conductor and for sealing between
for closing said ?ow passage of said valve element when
the outer member and the well ?ow conductor whereby
said valve element is in its upper closed position to pre
?ow of ?uids in the well conductor may occur only 10 vent ?ow of ?uids through said outer member and said
through such bore of the outer member; a valve element
valve element, said closure means being separated to per
having a longitudinal ?ow passage and a lateral passage
mit upward ?ow of ?uids through said ?ow passages of
communicating with said longitudinal flow passage and
said valve element and said outer member when said
the exterior of said valve element, said valve element be
valve element is in its lower open position to permit
ing mounted in said bore of the outer member for 15 upward ?ow of well ?uids through the well tool, said
limited longitudinal movement between a ?rst position
valve element having an upwardly facing surface thereon
and a second open position, said valve element and said
exposed to and responsive to the ?uid pressure of ?uids
outer member having closure members thereon engaged
?owing upwardly through the ?ow passage of said valve
when said valve element is in said ?rst position for
element and present in said outer member immediately
closing said lateral ?ow passage of said valve element
above said valve element whereby said valve element
to prevent ?ow of ?uids upwardly through said outer
moves to its lower open position when said ?uid pres
member and said flow passages of said valve element,
sure exceeds a predetermined value, said valve element
said closure members of said valve element and said outer
and said outer member having external and internal
member being disengaged when said valve element is in
?anges, respectively, and seal members on said ?anges
its second position to permit upward ?ow of ?uids through 25 sealing between ‘said ?anges and the valve element ‘and
the well tool, said valve element and said outer mem
said outer member, respectively, such ?anges and seal
her having external and internal ?anges, respectively, and
seal members on said ?anges sealing between said ?anges
and the valve element and said outer member, respec
tively, said ?anges and seal members de?ning a ?uid tight
chamber between said outer member and said valve ele
members de?ning a ?uid tight chamber therebetween for
receiving a predetermined charge of compressible gas,
said charge biasing said valve element upwardly toward
its closed position.
21. A well tool for a well ?ow conductor including:
ment for receiving a predetermined charge of compressible
an elongate outer member having a longitudinal bore
gas, ‘said charge biasing said valve element toward its
therein; hanger and sealing means on said outer mem
second position, said external ?ange of said valve ele—
ber for holding the outer member in a predetermined
ment being exposed to the pressure of the ?uids ?owing 35 position in a well ?ow conductor and for sealing between
through said ?ow passage of said valve element within
the outer member and the well ?ow conductor whereby
said outer member and present therein immediately above
?ow of ?uids in the well conductor may occur only
said valve element whereby the pressure of said well
through such bore of the outer member; a valve element
?uids moves said valve element to its second position
having a longitudinal ?ow passage and a lateral ?ow pas
when the pressure of said well ?uids present in said 40 sage communicating with said longitudinal ?ow passage
outer member above said valve element rises above a
and the exterior of said valve element, said valve element
predetermined value.
being mounted in said bore of the outer member for
18. A well tool of the character set forth in claim 17
wherein said outer member has means providing a ?ow
limited longitudinal movement between an upper closed
position and a lower open position, said valve element
port communicating between the exterior and the interior 45 and said outer member having closure means thereon en
of said outer member below said hanger and sealing
gaged for closing said ?ow passage of said valve element
means whereby well ?uids from below said well tool may
when said valve element is in its upper closed position
?ow through said port into said outer member above
to prevent ?ow of ?uids upwardly through said valve ele
said valve element; and valve means in said ?ow passage
ment and said outer member, said closure means being
in said port biased to closed position therein for pre
separated when said valve element is moved downwardly
venting ?ow of ?uids inwardly through said port into
to its lower open position to permit upward ?ow of ?uids
said outer member, said valve means having means there
through the well tool, said valve element and said outer
on projecting into the bore of said outer member and
member having external and internal ?anges, respec
exposed therein for engagement by means insertable into
tively, and seal members on said ?anges sealing between
said outer member for moving said valve means to its 55 said ?anges and the valve element and said outer mem
open position to permit ?ow of ?uids inwardly through
ber, respectively, said ?anges and seal members de?ning
said port.
a ?uid tight chamber therebetween for receiving a pre
19. A well tool of the character set forth in claim 17
determined charge of compressible gas, said charge bias
including an injection port means in the wall of said
ing said valve element upwardly toward its closed posi
tubular member providing communication between the 60 tion, said external ?ange of said valve element being
exterior thereof and the chamber de?ned therein between
exposed to the pressure of the ?uids ?owing through
the ?anges and said tubular member and said valve
the ?ow passage of said valve element and said outer
element whereby gas may be injected under pressure into
member and present therein immediately above said valve
said chamber to bias said valve element upwardly to
element whereby the pressure of said well ?uids moves
its closed position, and means closing said injection port 65 said valve element to its lower open position when such
means for sealing such gas in said chamber.
pressure of said well ?uids present in said outer member
20. A well tool for a well ?ow conductor including:
above said valve member rises above a predetermined
an elongate outer member having a longitudinal bore
value.
therein; hanger and sealing means on said outer member
22. A well tool for a well ?ow conductor including:
for holding the outer member in a predetermined posi 70 an elongate outer member having a longitudinal bore
tion in a well ?ow conductor and for sealing between
therein; hanger and sealing means on said outer mem—
the outer member and the well ?ow conductor whereby
ber for holding the outer member in a predetermined
?ow of ?uids in the well conductor may occur only
position in a well ?ow conductor and for sealing between
through such bore of the outer member; a valve element
the outer member and the Well ?ow conductor whereby
having a longitudinal ?ow passage and a lateral passage 75
flow of ?uids in the well conductor may occur only
3,090,443
15
23. A well ?ow control device including: a tubular
member; a valve element having a longitudinal ?ow pas
sage therein and movably mounted in said tubular mem
er; means in the tubular member biasing said valve
element upwardly to an upper position in the tubular
member; and upwardly facing surface means on said valve
element exposed to and responsive to ?uid pressure of
through such bore of the outer member; a valve element
having a longitudinal ?ow passage and a lateral ?ow
passage communicating with said longitudinal ?ow pas
sage and the exterior of said valve element, said valve
element being mounted in said bore of the outer member
for limited longitudinal movement between an upper
closed position and a lower open position, said valve
?uids ?owing upwardly through the ?ow passage of said
element and said outer member having closure means
valve element and present within the tubular member
thereon engaged for closing said ?ow passage of said
valve element when said valve element is in its upper 10 above the valve element for moving the valve element
downwardly against the resistance of said biasing means
closed position to prevent ?ow of ?uids upwardly through
to permit upward ?ow of ?uid through said control de
said valve element and said outer member, said closure
vice when the ?uid pressure present in said tubular mem
means being separated when said valve element is moved
ber immediately above the valve element exceeds a pre
downwardly to its lower open position to permit up
ward flow of ?uids through the well tool, said valve ele 15 determined value, said movable valve element having
valve seat means thereon adjacent the lower end of said
ment and said outer member having external and internal
?ow passage; and means on said outer member engage
?anges, respectively, and seal members on said ?anges
able with said valve seat means adjacent the lower end
sealing between said ?anges and the valve element and
of said movable valve element to close said ?ow passage
said outer member, respectively, said ?anges and seal
members de?ning a ?uid tight chamber therebetween for 20 upon movement of said valve element to its upper
position.
receiving a predetermined charge of compressible gas,
said charge biasing said valve element upwardly toward
its closed position, said external ?ange of said valve ele
ment being exposed to the pressure oi the ?uids ?owing
References Cited in the ?le of this patent
UNITED STATES PATENTS
through the ?ow passage of said valve element within
said outer member and present therein immediately above
said valve element whereby the pressure of said well ?uids
moves said valve element to its lower open position when
such pressure of said well ?uids present in said outer
member above said valve member rises above a prede
termined value, said external ?ange being shut off from
the pressure of the well ?uids below said well tool by the
engagement of said closure members on said valve ele
ment and said outer member when said valve element has
08 0
moved to its upper position.
l
2,144,850
2,187,635
2,509,839
2,592,325
2,644,481
2,940,470
Otis __________________ __ Jan. 24, 1939
Stamps ______________ __ Jan. 16, 1940
Panner _____________ __ May 30, 1950
2,963,089
Sizer __________________ __ Dec. 6 1960
774,785
Great Britain __________ __ May 15, 1957
Utis et all _______________ __ Apr. 8 1952
Perlman ______________ __ July 7, 1953
Morgan _____________ __ June 14, 1960
FOREIGN PATENTS
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