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Патент USA US2109546

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March 1, 1938.
(5_ E, MGLAGAN
>
2,109,546
TUBING CONTROL HEAD
Filed Nov. 20, 1936
2 Sheets-Sheet 1
@156 a
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YINVENTOR.
GEORGE E MCLHGAN
"@-WIQd-Mif
AT‘TORNEYS.
March 1, 1938.
' G, E, MCLAGAN
2,109,546
TUBING CONTROL HEAD
Filed Nov. 20, 1936
2 Sheets-Sheet -2
F5204~
INVEN TOR.
GEORGE‘ E. MLQQQN
- vPatented Mar. 1,
r
_ 2,109,546
. UNITED STATES PATENT‘ ‘oi-"rice - I
2,109,546 '
TUBING'CONTROL- HEAD
George E. McLagan, Los Angeles, Calii'., assignor '
to Abegg & Reinhold Company, Los Angeles,
Calif., a corporation of California _
Application November 20, 1938, Serial No. 111,838
?
' 5 Claims.
(Cl. 186-15)
,
.
.
This invention relates to oil well- equipment and packing structure and disclosing the manner in ‘I
particularly pertains to a tubing control head, which its elements interlock and which is pro-_
and is especially concerned with structures or vided to cooperate with guides within the hous
the type ‘shown in my co-pending application ;ing of the packing head.
5 ?led June_l8, 1930, and entitled "tubing blowout
Referring more particularly‘ to the drawings, 5
preventer. In the operation of oil wells it ‘often - l0 indicates a well casing at the upper end of dccurs that it is necessary to elevate the pump or
drill tubing, and in view of the fact that an ex
cessive amount of oil and gas pressure is present
10 vwithin the well it is diiiicult to remove the tubing
from the well casing without causing oil and gas
to spurt from the casing with a resulting waste
and the possibility of ?re.
>
It is the principal object of the present inven
15 tion to provide means automatically operating
and disposed at the upper end of a well casing
which is mounted a safety tubing head ll. 2 This
head is intended to accommodate, a well stem I!
which has been lowered into the well and which
in the present instance it is desired to elevate 10
‘from the well. This well stem provides a. plu
rality of sections connected by couplings l3. It
will be understood that the couplings are of
larger diameter than the stem.
Slips ll-are
couplings and while permitting the tubing to be
shownin Fig. 1 as being provided to grip the stem 15
and prevent it from lowering into the well. The
\tubing head comprises a base ?ange Iii which is
hereshown as having a hub portion internally
threaded~ to receive‘the upper end oi the well
casing Hi. The ?ange portion l6 receives a cy 20
lin'drieal body member 'I ‘I which is secured there-‘
to by bolts l8 at its lower end. The cylindrical
withdrawn at a rapid rate of speed.
body member is formed with a downwardly and -
through which tubing may be elevated and
‘which structure embodies a tubing head which
.will automatically seal the mouth of the well
20 casing around the tubing, irrespective 01' any dif
ierence in. the diameter of the tubing and its
»_
_The present invention contemplates the pro
inwardly tapering packing bore I9 which re
25 vision of a head adapted to be mounted upon the ceives a- packing structure 20'. The packing
upper end of a well casing and which head is, 1structure 20 is irusto-conical ‘in shape and com
formed with automatically expanding and con
pises a plurality of packing segments 2i. These
tracting packing members which will accommo :segments are here shown as each representing
date well tubingand couplings of a desiredv di
substantially 120° 01 a circle and as each being
30 meter, and which will automatically form a seal 1 formed with‘a groove 22in one of its longitudi 30
around the tubing and the couplings, irrespective naledges, and a tongue ‘23 in its opposite longi- .
of variations in diameter, and while the tubing is tudinal edge, whereby the contiguous edges‘ of
being continuously elevated from the-well.
The invention is illustrated by way of example
35 in the accompanying drawings in which:
the segments will at all times interlock; Each of ~
the segments is provided upon its upper end with
a wear member 24 and each segment is provided-‘35 Figure 1 is a view in central vertical section _ along its side with .a dove-tailed groove late 25'
through one form of my invention‘ showing the
packing structure as acting upon the tubing.
. '
'walloi
“
Fig. 2 is a view_ in central vertical section .the bore l9. The lengthv'oil the-tape" bore It’
40 through the device shown in Fig. 1 showing a in the packing body I 'I is consid
lyv greater 40
tubing'collar ll passing through the. packer 2|. than the length of the packing me, r II and'
‘ Fig. 3 is a view in transverse section through. thus accommodates a packing cup ‘I whichis'
the casing head as'seen on the line 3-3 of Fig. 2 ‘formed with an outturne'd ?ange 28 extending
and'as showing the construction of the packing. upwardly along the inclined face of the bore [8'
45
Fig. 4 is a view in central vertical section show
and with an intumed body portion '29 seated
ing-a' di?lerent i'orm of easing head in which ?uidi within an annular groove 30 of a pressure sleeve
pressure’;v utilizedto maintain the packing in II. The sleeve ii is formed with an outer‘ an
r
‘ nular shoulder-l2 which provides a seat for a
Fig. 5 is a view in transverse section through
50 the structure shown in Fig. 4 and as viewed
helical spring 33, circumscribing the sleeve and
itsisealedposition.
,
'
1
>
_
-
extending upwardly therealong to engage a pack so"
"ing ring 34 which, is formed with a semi-circular
Fig. 6 is a view in transverse section through. face 3! adapted to press into an-annular groove
"the valve structure for controlling the ?uid un
86 01' a resilient packing ring 31. The pressure
‘ (der pressure and as seen on'the' line
oiFlg. 4. sleeve ll extends upwardly- beyond the topvoi'
along the line 5—__5 of Fig.4.»
{'55 v1- Flg." 'l is aviewin
’
Y
'
body I‘! and into a cylindrical hous
2
2,109,546
ing 38 which is bolted to the upper end of the
packing body I‘! by bolts 39 and is disposed in
longitudinal alignment therewith. The cylindri
,
lindrical ports 58 and 59, and will alternately reg
ister with‘ an exhaust 66 through which ?uid
in the inactive side of the cylinder may be ex
cal housing 38 is formed with a bore 40 having a hausted as the plunger moves to force it out.
an annular inturned collar 4| at a point midway
its length. This collar has a central opening 42
therethrough of a diameter to permit the upper
end of the pressure sleeve 3| to project through
the opening and to be engaged by a pressure cross
10 head 43. This cross head is formed with a cylin
drical portion 44 which telescopes 'within the
upper end of the bore 4|! and rests with its lower
end against the upwardly projecting face of the
pressure sleeve 3|. :The cross head 43 is shown
15 in Figs. land 2 as being formed with cross head
In operation of the present invention it is to be
understood that a stem I! has been passed into
a; well casing and that it is the desire of the op
erator to elevate the stem from the casing at as
high a rate of speed as possible, but without at
tendant leakage of oil and gas. The stem is ele 10
vated by any suitable means and will slip through
the packing 20 while the packing ?rmly em
braces-the stem and fits tightly within thev tapered
bore IS. The packing 20 will also be held in this
seated position due to the expansive action of .15
bolts 45 which extend downwardly through open
springs 33 and.48. When variations in the diam
ing 46 in a ?ange 41 formed around and pro
eter of the stem occur such as would be the case
jecting outwardly from the upper edge of the when an enlarged coupling passes through the
cylindrical member 38.
packing, the upper edge of_ the coupling will strike
the lower edge of the packing unit 20 and will tend
20 As here shown expansion springs 48 are dis
posed. around the downwardly projecting por
to elevate this unit at the same time causing its
tions of the bolts 45 and are interposed between segments to move outwardly and upwardly along
the ?ange 41 and a washer 49, one of which is the inclined face of the bore l9, and as held and.
carried on each of the bolts and is held in posi ' directed by the dove-tailed grooves 25 in the
25 tion by a nut 50. It will thus-be evident that the packing segments and the dove-tailed ribs 26
cross head 43 and its extension 44 will be forcibly along the walls of the bore. This action will be
held against the upper end of the pressure sleeve against the expansive action of .springs 33 and
3| due to the expansive action of the expansion 48. This will cause force to be exerted against
springs 48. This action will tend to continuous
the lower end of the pressure sleeve 3| and will
30 ly exert a downward force upon the upper end ' cause compression of the spring 33 and movement
of the packing unit 20 and assist the spring 33 in of the cross head 43 against the expansive action
holding the packing unit ?rmly against its seat of springs 48. The packing members will be re
and resisting the gas pressure which may be ex
tracted until they have expanded su?iciently to
erted within the well, and in an effort to lift the form an opening through which the enlarged
coupling may pass, after which they will be forced
35 packing unit and' to cause it to expand and move
from contact and a sealing position with relation downwardly and inwardly by the springs to en
to the drill stem IE, or its couplings. As an added gage the wall of the tubing and seal it with rela:
precaution to hold the packing unit 2|] upon its’ tion to the tubing control head.
seat and to expand the packing cup 21 against
In the form of the invention shown in Fig. 3
and Fig. 4 of the drawings, the pressure exerted
40 the side wall of the bore l9, it may be desirable to
connect the well casing ID with the compartment by the packing may be optionally controlled by
formed by the bore 40 within the cylindrical the operator, by the manipulation of the valve 62
member 38 and at a point above the packing cup and the amount of pressure imposed upon the
21. This is accomplished by securing a pipe 5| upper faces of the plungers‘ 56. When it is de45 through the wall of the casing l0 and leading it sired to relieve this pressure and thus discon
outwardly and then connecting it with a pipe 52 tinue the gripping action of the packing unit, and
which may be interrupted at a point along its its effect in sealing the tube within the casing,
length by a valve 53. A pipe 54 is connected the valve is manipulated to cause pressure to be
with the upper end of the pipe 52 and is secured exerted upon the lower‘ side of the plungers 56
which will tend to raise the cross head 43 and
50 in communication with the compartment formed
by the bore 43 so that the well pressure will be permit the packing unit to be held down only by
' equalized on each side of the packing unit and
will be to a great extent neutralized.
In the vform of the invention shown in Fig. 4
65 of the drawings, it will be seen that instead of re
lying upon the expansive action of springs 33 and
20
25
40
~
_
45
50
'
the spring 33. In conditions of excessive pres- .
sure it may be desirable to utilize the‘ pressure onv
the fluidwit-hin the wel’. to hold the packing in
position, and this is accomplished by opening 55
valve 53 as shown in Fig. 1 of the drawings and
}in permitting the ?uid to by-pass so that it will
48 to hold the packing members on their seats
and to resist the internal pressure of gas with - exert a pressure upon the upper end of the pack
in the well casing, ?uid pressure means is ing structure. This pressure will act to expand
provided and may be controlled at the option the packing cut 21 in the tapered bore and will 60
of the operation. This structure includes plung
er rods 55 secured to‘the cross head 43 in sub
stitution for the bolts 45. The lower ends of
these rods are ?tted with a plunger 56 which
are reciprocably mounted within cylindrical bores
51. Fluid inlet ports 58 are formed through the
walls of the cylinders at their upper end and ?uid
-' inlet ports 59 are formed through the walls of the
also act to force the packing downwardly against
the pressure of the fluid within the well.
It will thus be seen that the structure here dis
closed provides simple means adapted to be read
ily mounted upon the upper end of a well casing; 65
and which will act automatically to continuously
pack the casing and form a seal between it and
the tubing extending downwardly therethrough,
cylinders through their lower end. These ports
communicate with manifold pas'sageways?'ll and
6|, respectively, which are controlled by a two
irrespective of variations in the diameter 01' the
tubing or of the rate of speed 'with which the 70
way valve 52 to which ?uid under pressure is de
livered through a pipe 53. The valves are formed
same time providing means whereby the packing
pressure may be optionally increased or relieved
with circumferential ports 84 and 65 which may
be alternately brought to register with the cy
tubing is being withdrawn, the device at the
as
required.
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~
While I have shown the preferred form of my 75
3
2,l09,546
packing member including a plurality of' inter
invention, as now known to me, it will be under
stood that various changes may be made in com
bination, construction, and arrangement of parts
by those skilled in the art without departing from
the spirit of the invention as vclaimed.
Having thus ‘described my invention what I
claim and desire to secure by Letters Patent is:
1. A tubing control head for well casing, com
prising a housing structure adaptedto be-mount
ed upon the upper end of a well casing and from
which casing a well tubing is to be withdrawn,
a downwardly and inwardly tapering‘packing
seat within the housing and through which the
tubing extends, a frusto-conic‘al segmental pack
15 ing member adapted to rest upon said seat, and
to embrace the tubing extending therethrough,
said packing member including a plurality of
interlocking segments, means whereby the indi
vidual segments will interlock with the tubing
seat permitting the segments to move radially.
locking segments, means whereby the individual
segments will interlock with the tubing seat per
mitting the segments to move radially with re
lation to their common axis and move longitu-.
dinally of the tapered face of the seat, and spring
means. tending to force the packing segments
downwardly along the tapered’ face of theseat
and hold them in intimate contact with‘the sur
face of the tubing extending therethrough, a pres 10
sure sleeve through which the tubing extends and
which sleevev rests against the upper end of the
packing unit, and ?uid pressure means optionally
controlled to exert pressure upon the sleeve and
to thus increase the pressure upon the packing 15
member.
'
'
4. A tubing control head for well- casing com
prising a housing structure adapted to be mount
ed-upon the upper end of va well casing and
through which a tubing member extends, a ta 20
pered-segmental packing within the housing and
adapted to circumscribe the tubing extending
and spring means tending to force the packing _ therethroughia tapered seat within the housing
segments downwardly along the tapered face of for the packing which seat tapers. upwardly and
with relation to their common axisand move
longitudinally of the tapered face of the seat,
25 the seat and hold them in intimate contact with
the surface of the tubing extending therethrough,
a packing cup carried at the upper end of said.
packing, and means for conducting ?uid under
pressure from the casing into the housing where
30 by it will act against said packing cup and the
upper end of the packing to force the cup out
wardly against the tapered seat of the housing
and to force the packing downwardly to ‘a. sealing
position.
35
'
downwardly and inwardly tapering packing seat
40 within the housing and through which the tubing
a
wardly into the housing and resting against the
upper ends of the packing segments,.yieldable
means holding said sleeve in constant contact
with'the upper end of said segments, a cup pack
ing carried upon the lower end of said sleeve with
frusto-conical segmental packing
member adapted to rest upon ‘said seat, and to
embrace the tubing extending therethrough, said
‘ packing member including a plurality of inter
45 locking segments, means'whereby the individual
segments will interlock with the tubing seat per
mitting the segments to move radially with rela
tion to their common axis and move ‘longitudi
nally of the tapered face of the seat,-and spring
50 means tending to force the packing segments
downwardly along the tapered face of the seat
_ and hold them in intimate contact with the sur
face of the 'tubing/ extending ‘therethrough, a
pressure sleeve through which the tubing ex
tends and which sleeve rests against the upper
end of the packing unit, and auxiliary pressure
its free edge ?aring upwardly and outwardly to .
for delivering ?uid under pressure into the hous
ing'and above said cup packing whereby to force
the sleeve downwardly to hold the packing seg
ments in packing relation to the tubing extend
ing therethrough and the seat for said packing.
‘5. A tubing control head for well casing com
prising a housing structure adapted to be mount
ed upon the upper end of‘ a well casing and.
through which a tubing member extends, a ta
pered segmental packing within the housing and
adapted to circumscribe the tubing extending -46
therethrough, a tapered seat within the housing
for the packing which seat tapers upwardly and
outwardly so that the packing will recede as a
coupling of the tubing is drawn upwardly and
encounters the packing, a sleeve extending down
wardly into the housing and resting against the
upper ends of the packing segments, yieidable
means holding said sleeve in constant - contact
with the upper end of said segments, a cup pack
ing carried upon the lower end of said sleeve with 55
its free'edge ?aring upwardly and outwardly to
contact with the tapered packing seat, and means
for by-passing ?uid from the 'well easing into the
3. A tubing control head for well casing, com
housing and against the'cup packing carried by
prising a housing structure adapted to be mount
60 ed upon the upper end of a well casing and from v‘the sleeve whereby the pressure of this ?uid will
means for holding said sleeve in position.
so
contact with the tapered packing seat, and means
'
2. A tubing control head for well casing, com—
prising a housing structure adapted to be mount
ed ‘upon the upper end of a well casing and from _
whichcasing a well tubing is to be withdrawn, a ‘
v extends,
outwardly so that the packing will recede as a 25
coupling of the tubing is drawn upwardly and en
counters the packing, a sleeve extending down
I
‘act against thev cup packing and the sleeve to
a downwardly andinwardly tapering packing seat' force'the sleeve downwardly and hold the ‘seg
mental packing in its packing position by a ?uid
within the housing and through which theftub
which casing a well tubing is to be withdrawn,
1 ing extends, a frusto-conical segmental packing
-65 member adapted to rest upon said seat,.and to
embrace the tubing extending therethrough, said
pressure-
_
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I
GEORGE E. McLAGAN.
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