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Патент USA US2131822

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Oct. 4, 1938.
H. A. SCHMIDT
V2,131,822
WELL PUMP
Filed Sept. 8A, 1936
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Oct. 4, 1938.
H. A. SCHMIDT
2,131,822
WELL PUMP
Filed Sept. 8, 1936
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H. A. SCHMIDT
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WELL PUMP
Filed Sept. 8, 1936
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2,131,822
Patented Oct. 4, 1938
UNlTEo _STATES PATENT _ OFFICE?
WELL PUMP v
Herbert A. schmidt, Whittier', oeuf., assigner ef
one-half to James V. Keith, Los Angeles, Y
Calif.
Application September s, 1936, señal Ne. 99,750
15 Claims. (c1. 10s-_190)
This invention relates to pumping apparatus
and relates more particularly to well pumps. A
general object vof this invention is to provide a
practical and very efficient double acting well
5
pump.
Y
v
Another object of this invention is to provide
a pump for use in oil wells, etc. that is operable
to alternately dischargecharges- of liquid and
gas into the oil string.
`
-
i
Another object of this‘invention is to provide
gitudinal, fragmentary detailed sectional View
of the upper portion of the pump illustrated in
Fig. 3 showing the plunger latched at the lower
end of its stroke. Fig. 5 is a View similar to Fig.
1 illustrating still another form of the invention. 5
Fig. 6 is an enlarged fragmentary longitudinal
detailed sectional view of the upper portion of
>the pump illustrated in Fig. 6` showing the plung
Ver at the lower end of its stroke, and Fig. 'l is
an enlarged fragmentary longitudinal sectional Vl0
a deep well pump that assures the eiiicient re
view of a ‘slightly modified form of anchor as
covery of- the liquid or oil from the well by dis
charging a charge of gas into the oilv string fol
lowing each oil elevating stroke, which gas ma
terially assists in raising the oil to the surface.
sembly.
Another object of this invention is to provide
_a double acting pump of the character mentioned
that is adapted to receive gas under pressure that
may bepassed into the well from the surface of
the ground and that discharges this gas under
pressure into the oil string following each oil ele
~
The »present invention is adapted to be em
bodied `in Various forms and may be provided
in the form of attachments for use with typical `15
well pumps. .In the following detailed disclosure
I will described several typical forms and instal
lations of the invention, it being understood that
the invention is not »to be construed as limited
or restricted to the speciiic structures or appli- 20
cations about to be described, but that it is to
be taken as including any featuresY orfmodii‘lca
Another object of this invention is to provide tions that may fall within the scope of the claims.
The embodiment of the present invention illus
an improved well pump that is double acting and
»trated
in-Figs. 1 and‘2 of the drawings includes, 25
that
is
operable
to
displace
or
elevatea
charge
25
generally, 'a seat I0 Von the lower end of an oil
of liquid during each movement of its plunger.
Another object of this invention is to provide rstring S, a pump barrel II; an anchor l2 con
an appliance or attachment for a well pump that nected with the barrel‘Ii and cooperating with
>renders `the pump double acting therebygreatly the seat I0 to suspend the barrel where it extends
vating stroke.
increasing its efliciency.
Á
`
.
`
‘
l
Another object of this invention is to provide
an appliance or attachment of the character
mentioned that may be readily applied to a typ-`
ical well pump with a minimum of alteration and
`at little cost.
. Another object of thisinvention is to provide
an attachment or appliance for a typical single
‘acting deep `well pump `that makes the pump
double acting and that provides for the alternate
pumping oi liquid and gas.
The various objects and features of my inven
-tion will be fully understood fromV the following
beyond the lower end of the string S,`a plunger v30
I3 operable in the barrel Iû to displace liquid
upwardly into the string S during'its down stroke
and means >Iliwhereby the plunger I3 displaces
_gas into the string S during its up stroke.
The `seat I0 and the associated parts may be"35
in the form -of an >attachment for application to
the lower end of a typical oil string S. The string
S is provided to conduct the fluid from the well
and >may be madeup of lengths of tubing in the
usual manner; The seat IIJ is a tubular member 40
connected with the lower end of the oil string S
by a suitable coupling I5. A downwardly and in
detailed description of typical preferred forms ~ wardly inclined wall Iâ is provided on the interior
and> applications of my invention, throughout of the seat I0. 4An annular downwardly facing
which description reference is made to the ac
companying drawings, in which:
Fig. l is a central longitudinal detailed Sec
`tional view of one form of the invention show
. shoulder I'I is provided on the‘interior of the seatv45
I0 'below its inclinedwall I6. The shoulder I1
is preferably inclined downwardly and outwardlyr
Vas illustrated.
In accordancelwith `the invention
ing the parts in the operative `positions in the a tubularl section I8 is connectedwith the lower
well. Fig. 2 is an enlarged fragmentary longi S end of the'seat I0. `The section I8 may be thread- 50
ed on the lower `portion `of-the seat It] and may
tion of the pump illustrated inFig. 1 showing be of substantially the same diameter as the oil
the plunger at the lower end of Vits stroke. Fig. lstring S. A_shoe or collar I9'»is` provided on the
3 is a View similar to Fig, 1 illustrating another lower end. ofthe section 4i8 and presents an up
wardlyfacing `internal shoulder 20.
, 55
form of the invention. Fig. 4 is an enlarged, lon
. tudínal detailed sectional view of the upper por
2
2,131,822
An annular or tubular packing assembly 2| is
provided in the section I8 and is supported on
the shoulder 20. The packing assembly 2| may
comprise superimposed rings. Alternate rings
of the assembly 2| have inwardly and outwardly
convergent ends and the ends of the adjacent
rings cooperate whereby the packing assembly
tends to expand both inwardly and outwardly
when subjected to compression. The lower end of
the lowermost ring of the assembly 2| is inclined
downwardly and inwardly and cooperates with
the shoulder 2|] which may be correspondingly
it from the well the cooperation of the upper
outer corner of the lock ring 32 with the inclined
shoulder I'I results in contraction of the ring so
that it passes upwardly through the seat II) allow
ing the pump to be withdrawn from the seat I0.
In accordance with the invention the anchor I2 is
provided with means for packing about the
plunger I3. A tubular section 33 is threaded in
the upper end of the anchor collar 3U and projects
upwardly from the collar. A collar 34 is threaded
on the upper end of the section 33 and carries a
tubular member 35. A packing assembly 36 simi
inclined, as illustrated. A metal ring or follower
22 is provided at the upper end of the packing
lar in nature to the packing assembly 2| is ar
ranged within the tubular member 35. A gland
assembly 2| and its upper end cooperates with or follower 31 is threaded in the upper end of
a downwardly facing shoulder 23 on the interior the member 35 to compress the packing assembly
of the section I8. The packing assembly 2| is 36. The upper end of the follower 31 may be
adapted to be compressed by the collar I9 and is Y open to the interior of the string S to allow the
provided to seal between the section I8 and parts fluid pressure or ñuid head in the string to com
20 on the barrel, as will be hereinafter described.
press the packing assembly 36.
20
The barrel II constitutes the outer relatively’I
The plunger I3 is the reciprocable element of
stationary element of the pump proper. The the pump and is operable by a typical pump rod
barrel I I is an elongate tubular structure extend
R. The plunger I3 extends through the packing
ing downwardly from the packing assembly 2| to
25 project into the ñuid of the well.
A standing
valve V is provided on the lower end of the
barrel II. The standing valve V may include a
tubular cage 24 having an internal seat 25 and a
ball 26 in the cage 24 for seating downwardly on
30 the seat 25. It will be observed that the lower
end of the barrel I I carrying the valve V may be
unsupported and need not be provided with an
anchor or the like. A connecting member 21 is
- threaded in the upper end of the barrel I I to fa
cilitate its connection with the anchor I2. The
barrel II, its valve V and the plunger I3 may be
typical well pump parts.
The anchor I2 is provided to suspend the barrel
II and to hold the barrel against movement.
40 The anchor I2 includes a tubular member 28
threaded on the upper end of the connecting
A50
member 21 to extend upwardly through the pack
ing assembly 2|. The tubular member 28 ex
tends upwardly into the lower end of the seat I0
and its upper portion may be increased in wall
thickness. A connecting member 29 is threaded
in the upper end of the tubular member 28. An
anchor collar 30 is threaded on the upper portion
of the connecting member 29 and has its lower
end spaced some distanceÀ above the upper end
of the tubular member 28. 'I’he anchor collar 30
is provided with a downwardly and inwardly in
clined surface 3| adapted to cooperate with the
wall I6 of the seat IIJ-to suspend the barrel II
from the seat. The cooperation of the surface 3|
with the seat wall I6 also prevents fluid from the
string S from passing downwardly into the
tubular section I8.
A split lock ring 32 surrounds the connecting
60 member 29 between the lower end of the anchor
collar 30 and the upper end of the tubular mem
ber 28. The periphery of the lock ring 32 is
assembly 3B, and the various parts of the anchor
I2 to extend into the barrel II. The plunger I3
carries the cup leathers or other suitable sealing
elements 38 for slidably sealing with the interior
of the barrel II. The sealing elements 38 are
preferably such that they are eiîective during
both strokes of the plunger. Heads 39 may be 30
provided on the plunger I3 at the opposite ends
of the assembly of sealing elements 38. 'I'he re
ciprocating plunger I3 is tubular to conduct the
liquid from the barrel I I to the string S during its
down stroke. A working valve V' is provided on
the plunger I3 to control the passage of iluid
through the plunger. In the particular instance
illustrated the valve V’ is provided at the upper
end of the tubular plunger I3, it being under
stood that the valve V’ may be otherwise po
sitioned on the plunger I3. 'I‘he valve V’ in
cludes a ported cage 40 secured to the upper end
of the plunger I3.and to the lower end of the
rod R to form a connection between the plunger
and red. The cage 40 houses a valve or ball 4I
which cooperates with a seat in the cage to con
trol communication between the interior of the
string S and the interior of the barrel II. The
vabove described packing assembly 36 seals about
the plunger I3 to prevent the leakage of fluid
from the string S into the anchor I2.
The means I4 provides for the pumping of gas
from the well into the string S during each up
stroke of the plunger I3. It is a feature of the
invention that the means I 4 renders the pump 55
double acting so that it displaces or forces fluid
into the string S during each movement of the
plunger I4. The means I4 includes a multiplicity
of ports 43 in the wall of the section I8. The
ports 43 communicate with the interior ci the 60
section I8 between the lower end of the seat Iû
and the upper end of the follower 22. In installa
tapered downwardly and inwardly. When the tions where the level L of the liquid in the well
pump is lowered through the string S to its po
is above the ports 43 the invention provides a
65 sition in the well the tapered periphery of the
tube 44 for carrying the gas from the well to
lock ring 32 cooperates with the inclined wall I6 the ports. The tube 44 may be threaded on the
of the seat IIJ and this cooperation causes con
exterior of the collar I9 to have its lower end
traction of the ring. When the ring 32 moves . closed against the entrance of the liquid in the
past the shoulder I1 it snaps outwardly or re
well. The tube 44 extends upwardly around the
turns to its original dimensions to cooperate with section I8, the seat I0 and the string S to a
the shoulder I1. The cooperation of the lock point above the level L of the iluid in the well.
ring 32 with the shoulder I1 serves to hold the The gas conducting tube 44 surrounds the parts
barrel II and its associated parts against up
just mentioned with substantial clearance leav
ward movement relative to the string S. When an ing an annular passage for conducting the gas
75 upward strain is applied to the pump to remove downwardly to the ports 43. 'I'he tube 44 may be
2,131,822
3
formed of one or‘more. lengths of tubing. It is
to l‘be `understood that where the level L of the
is reciprocated in the usual manner to reciprocate
the» plunger I3. During the upstroke 'of the
liquid in the well'is‘below the ports‘43 the tube
. plunger \ I3 a reduced pressure is created in the
y
lower end of the barrel -II resulting 'in opening
" The means I4 further includes inlet valve
l means for controlling the admission of gas from
of the‘valve 26 `and passage of‘liquid from the
well into‘the lower end of the barrel. As 'the
plunger `I3 moves upwardly gas which may have
been drawn intothe upper end of the barrel dur
‘44`rnay be eliminated.
»
i
the ports 43 andthe interior of the section> I8
vtol the upper end of .the pump barrel l-I. An
annular inclined shoulder or seat 45 is provided
10 'on therinterior oil the member 28 and ports 45
extendvthrough the wall of the member 28 to
the seat 45;V The ports 4B have their outer ends
in communication` with the interior ofthe sec
ingrthe previous down'stroke‘of the .plunger is
yforced upwardly through the passage P under 10
pressure and'raises theV valve 5I to pass into the
lower end of the oil string S. Thus during the
up‘stroke ofthe plunger I3 a charge of liquid is
tion I8 and, therefore, communicate with theV drawn into the barrel II and a charge of gas is
`ports 43. A shiftable gas inlet valve 41 of tubular discharged into the lower end of the string S.
form‘is arrangedpwithin the member28. to coop
erate with the seat 45. Theupper end «of the
valve 41 is tapered to effectively. cooperate -with
Ythe seat 45 and fully close the ports 46. The
i20 valve 41 surrounds the`plunger I3 .with substan
" Atialclearance leaving an annular fluid passage.
A spring 48 is arranged under compression' be
-tweenuthe upper end >of the connecting member
21 and the lower endof the valve 41 to yieldingly
During th'e‘down stroke of the'plunger I3 the
.charge of oil in the barrel II below the sealing
elements 3S of the plunger I3 is displaced up
íwar'dly through the tubular plunger to open the
15_
valve 4I.v and discharge into the oil string S. As 20
‘the plunger I3 moves downwardly inthe barrel
II a reduced or lessened pressure is created vin
-the barrel above the elements 38 and the gas in
the well is drawn or received inthe barrel above
25 hold the valve in sealing. cooperation with the
the'plunger. Thus .during the down strokeV of 25
the plunger I3 a charge oi liquid is discharged
I3 extends through the connectingrmembers 21
into the lower end ofthe oil string S and a charge
of ygas is received in the barrel II above the seal
ing elements 38. Thegas received in the pump
may be rock gas or` gas produced from the earth 30
formation or may be gas pumped into the well
from the surface of the ground to facilitate the
recovery of the oil `or liquid. The pump illus
seat 45y where -it closes the ports 46. The plunger
and 29, the tubular member 28 and the anchor
-collar 30 with substantial clearance leaving an
UO annular gas passage l?.V The lower .end of the
`passage P is in direct communication with the
_ upper end of the barrel` Il `and the valve 41 de
scribed above controls the communication be
.tween the passage P and the interiorV of the
tubular section I8.
.
trated in 1Figs. l and 2 of the. drawings operates
to discharge alternate charges of liquid and gas
The means I4 further includes outlet valve l into the oil string S under pressure.. The charges
means controlling communication between the of gas forced into the oil string by the pump
upper end of the passage P and the lower end greatly assist in elevatingV or lifting the liquid
to the surface of the ground in the well known
manner. Being double` acting the well pump de~ Iii)
`scribed above is particularly efficient. It will be
noted that the barrel II, the `plunger I3 and the
valves V and V’ may be elements of a typical well
end and communicate with the groove 49. A ' pump while the other parts described above may
'shiftable discharge valve 5I is provided t0 con- Y constitute an attachment or appliance for mak
trol the ports 50.V The valve 5I may be a tubular ing the pump double acting and gas handling.
of the string S.
An annular recess or groove 49
is provided in the interior of the anchor collar
30 toconstitute the upper end of the passage P.
A plurality of spaced `vertical ports 5i! extend
`downwardly through the collar 3l) from its upper
member shiftably surrounding the tubular seo
tion 33. The lower end of the valve 5I is adapt
ed to cooperate with the upper end of the collar
35 to close the ports 5I). Gravity and the hydro
static head in the string S serve to hold the valve
5I in its closed position and to return it to its
.closed position after operation.` The lower end
of the collar 34 limits the upward travel of the
55
valve 5I.
Í Ä
and application of thev invention embodying a
typical anchor I2a and adapted to be anchored
in the lower end of'a string of oil tubing T. The
pump illustrated in Figs. 3 and 4 of the drawings I
includes, generally, a pump barrel ‘IIa carrying
the anchor I2a and adapted to be anchoredV in
the lower end of the string of `oil tubing T, a
plunger I3a operable in the barrel IIa, packing.,
,
When the oil string S is to -be run into the well
the seat II), the tubular section I8, the collar I9,
the tube 44 and the associated parts are ‘connecte
" l60
' ‘ Figs.v 3 and Llof the drawings illustrate a form
„ ed with the lower end of the string.V Following
the proper setting or positioning of the string S
the well pump may be lowered through the string
to its operative position. When the pump ap
proaches its operative position the barrel II
passes through the packing assembly 2|. When
’means 55 carried by the `barrel Ila to seal with
the string T, and means I4n whereby the pump is
operable to handle gas admitted to the string T
below the packing means 55.
The barrel IIa may be of typical construction, 60
.being an elongate tubular member or assembly.
The barrel I'Ia extends longitudinally through the
string T with substantial clearanceleavíng an
the lock ring 32 engages `the inclined seat surface
annular iiuid passage 56. A connecting member
51a >is provided on the upper end of the barrel
`I6 it is` contracted and upon’passing the shoulder`
I1 the lockA ring 32 expands or returns to its
Ila to facilitate its connecting with the packing
means 55. 4A typical anchor shoe 51 is provided
normal size. The anchor surface 3| seats on the on the lower end of the string T.> The shoe 51
wall I6 of the seat Ill to suspend the barrel VI I ' . has a downwardly and inwardly inclined seat 5B
from the seat while the ring 32 cooperates with on its interior and has an annular internal ilange 70
70
59 spaced below the seat 58.
' -
the shoulder I1 to preventupward movement
ofthe innerv barrel and the connected parts.
The pump is irl-condition for ,operation vwhen
seated orlocated as `just described.
q
'I’he anchor .I2El is provided on the lower end `
ofthe barrel‘I I@ to cooperate with the anchor
shoe 51. >In practice the anchor I2EL may be kcon
During operation the _string of. pllmllrods R l nected Withthe lower end of the barrel .IIa by 75
4
2,131,822
a tubular valve cage 60. The valve cage 60 may
be thre'aded on the anchor I2a and may be con
nected with the vbarrel I Ia by a suitable connect
ing member 6I. 'I'he anchor I2a has a down
$1 wardly and inwardly tapered face 62 adapted to
seat on and seal with the seat 58. The lower por
tion of the anchor I2@ is split into a multiplicity
of flexible lingers 63 which carry lugs 64. The
lugs 64 are adapted to spring into. cooperation
with the under side of the flange 59 when the
pump is lowered into place and their cooperation
with the flange 59 releasably holds the pump
against upward movement. The anchor shoe 51
and the anchor I2a just described may be of
typical construction. A standing'valve is pro
vided on the lower end of the barrel Ila. The
standing valve may comprise a seat 65 in the
lower portion Vof the cage 68 and a ball valve
66 for cooperating downwardly with the seat 65.V
20 The connecting member 6I may have an internal
perforate web 61 to limit the upward movement of
the valve 66.
The plunger I (liL is the reciprocating element
of the pump. 'I'he plunger I3a extends into the
barrel IIa from its upper end and carries series
of packing means or elements 68 for slidably seal
ing with the interior of the barrel I Ia. The seal
ing elements 68 are preferably operable to seal
with the interior of the barrel I9a when the plung
30 er I3a operates in both directions. The plunger
I3a is tubular to pass or conduct fluid from the
barrel IIa upwardly into the string T.
ing valve is carried by the plunger
traveling valve may be arranged at the
35 of the plunger I3a and may comprise
A travel
|33. The
upper end
a cage 69
forming a connection between the upper end of
the plunger I3a and the plunger operating rod
R. 'I'he cage 69 is perforate and houses a ball
valve 1I). The valve 'I8 is adapted to seat down
wardly in the cage 69 to close olf communication
between the interior of the string T and the in
terior of the plunger I3a during the upward move
ment of the plunger.
The packing means 55 is provided to seal off
the upper end of the passage 56 from the interior
of the string T above the passage. The packing
means 55 includes a tubular section 1I threaded
on the upper end of the connecting member 51a
to extend upwardly through the string of tubing.
The upper portion of the section, 1I is thickened
and an annular external flange 12 is provided on
the member 1I between its ends. A packing as
sembly 13 surrounds the thickened portion of
the section -II above the flange 12. The packing
assembly 13 may be similar to the above described
packing assembly 2| comprising a multiplicity of
superimposed rings having tapered abutting ends
- whereby the assembly is expansible outwardly as
well as inwardly when subjected to compression.
60 The packing assembly 13 is operable to seal with
the interior of the string T and with the exterior
of the tubular section 1I. ’A follower 14 is pro
vided to cooperate with the upper end of the
packing assembly 13. The follower 14 is an elon
gate tubular member and its lower end bears on
the inclined upper end of the upper ring in the
packing assembly 13. A tubular member 'I5 of
reduced diameter is threaded in the upper end
portion of the section -II and a packing gland
housing or body 16 is carried on the upper end
of the member 15. A packing assembly 11 is ar
ranged in the body ‘I6 to- seal about the plunger
I3a. The packing assembly 11 may be similar
to the assembly 55. A follower 18 is threaded
in the upper end of the body16 to actuate or com
press the assembly 11. A spring 19 is arranged
ìmder compression between a shoulder 8U on the
body 16 and a shoulder 8I on the follower 14 t0
urge the follower downwardly against the packing
assembly 13. The spring 19 is provided to actuate
or assist in actuating the packing assembly 13.
The invention provides means for connecting
the barrel IIa and the parts connected therewith
with the plunger I3EL and rod R to be run through
the tubing string T on the rod R with the packing
assembly 13 in a normal uncompressed state. TheA
tubular follower 14 projects upwardly beyond
the upper end of the gland body 16 and has two
diametrioally opposite bayonet slots 82. The
bayonet slots 82 extend downwardly from the
upper end of the tubular follower 14. VA pin 83
projects radially from opposite points on the cage
69 to cooperate-with the bayonet slots 82. When
the follower 14 is connected with the rod R by
the pin 83 cooperating with the bayonet slots 82 20
the barrel IIa, the tubular section 1I, the mem
ber 14, the gland body 16 and the associated parts
are supported on the shoulder 8I through the
medium of the spring 19. Thus the pressure
exerted on the packing assembly 13 by the spring 2.5
'I9 is relieved from the packing assembly when
the pump is run into the well. Following the
anchoring of the pump in the shoe 51, as de
scribed above, the rod R may be given a partial
rotation and a slight upward movement to dis 30
engage the pin 83 from the bayonet slots 82 where
upon the plunger I3EL may be reciprocated by the
rod R.
The means I4a is provided to render the pump
double acting and capable of handling gas as well '
as liquid. The means I4a includes means for
admitting gas from the well or well casing into
the passage 56. A multiplicity of spaced ports
84 is provided in the string of tubing T to com
municate with the passage 56 below the flange 12. 40
In certain installations the ports 84 may directly
communicate with the portion of the well or the
well casing carrying the gas. Where the level L
of the liquidrin the well is vabove the ports 84,
as illustrated in the drawings, a tube 85 may be
threaded on a coupling 86a of the string T to
extend upwardly around the string to a point
above the liquid level L.
The tubing 85 is spaced
some distance from the string T to leave an annu
lar passage placing the ports 84 in communica
tion with the portion of the well containing the
, gas.
The means I4a further includes inlet valve
means for governing the admission of gas to the
upper end of the barrel IIa. This valve means
may include a seat 86 on the interior of the tubu
lar section 1I. Ports 81 extend through the wall
of the tubular section 'II to have their outer ends
in communication with the passage 56 and to
have their inner ends at the seat 86. A shiftable 60
tubular valve 88 is arranged in the tubular section
1I and is adapted to seat upwardly against the
seat 86 to close the ports 81. A spring 89 is ar
ranged under compression between the lower end
of the valve 88 and the upper end of the con
necting member 5`Ia to urge the valve 88 to its
closed position. The plunger I 3a extends through
the tubular section 1I with substantial clearance
leaving a fluid passage 90 which has communica
tion with the interior of the barrel I Ia and which
extends upwardly to an annular groove 9| in the
upper portion of the section 1I. Valve means is
provided to govern communication between the
passage 98 and the interior of the string T above
vthe packing means 55. This valve means may.
5
’include a multiplicityof ports 92 extending up-4
wardly through the section 1| `from the groove 9|
`to the upper end of the Section.
A shif table tubu- '
lar valve 93` surrounds the member 15 and is
adapted to cooperate with the upper end of the
`section 7| to close the ports 92. Gravity and the
`head of fluid in the tubing string T may hold the
valve 93 in its closed position.
k
. Y
. The pump illustrated in Figs.V 3 and 4 of the
.10. `fdrawings may be anchoredl in its operative posi
" tion Qin the well `by lowering it into the well on
k l.the string of rods R. When the pump is >lowered
, 15
through thewell the pin 83 cooperates with the
bayonet slots 8.2‘ whereby the rod R carries the
tubular follower‘l4 `and through> the medium of
the spring'lS bearing onrthe shoulder 8| carries
the other parts "of the pump. When the pump
reaches its proper position'in the well the anchor
I2a is automatically latched in the‘shoe 5`|,"as
Following the‘anchoring of the
20 described above.
pump the rod R is turned and moved upwardly
to release the pin 83 from thebayonet slots 82.
The spring 19 then exerts its pressure upon the
`<packing assembly 13 to actuate the same against
25 the controlof the string T and the exterior ofthe
section '|'|`. ‘The pump is then in condition for
ted. The lower‘end of the‘passage 56, occurring
between the `barrel ||a and the interior of the
tubing string‘T has communication with the in
terior of the ~anchor |2ß below the valve 66.
A
plurality of lateral ports 56 is provided in the
anchor 12a to place the lower portion of the pas
sagef56 inlcommunication with'the interior of
the anchor.> vThepo-rts 96 communicating with
the interior of ¿the anchor |28~ below the valve 66
admit the Well fluid‘into the passage 56.
The operation of the pump> illustrated in Figs.
5 and 6 of the drawings is substantially the same
as the operation’of’the structure illustrated in
Figs. 3fand 4‘, except that the pump handles liq
uid duringeach movement of its plunger'lâa. 15
During the down stroke of the plunger I3a liquid
is displaced from the lower portion of the barrel
Ha through the `plunger to‘dìscharge into the
tubing string'I‘.` During the down stroke of the
plunger i3a liquid is drawn through the anchor
>|2a`,.the ports 96, the passage 56 and the ports
31 into the upper portion of the barrel | la. Dur
per portion- of the barrel |'|a causing opening of
ing the up stroke ‘of the barrel ||a the liquid in i
the barrel above the sealing elements 68 is forced
through ‘the ports "92 and the tubular follower ‘M
into the‘tubing‘string T and liquid is drawn into
the'lowerïportion of the barrel ||a through the
anchorî l2a andl past the valve 66.
Fig;A 7 of the drawings illustrates a slight modi-fication off the plunger and anchor structure il
lustrated in Figs. 52and 6. In this form of the
invention a member 98 is interposed between the
upper end of the anchor l2a and the lower end
of the valve cage 6|). The member 98 `may` be
`the valve `88 and the admission. of gas> from the
threaded 'on the upper` end‘ of' the anchor l2a
operation.
k
.
.
l
‘
`
`Duringftheïdown stroke of the plunger |3a
fluid lwithin 'the> barrel ||a below the packing
.30 elements-68 is displaced upwardly through the
plunger ‘|311` to discharge past the ‘valve 'l0 into
the string T. As tlfieïplun'ger"ItEL moves down
wardly a reduced pressure is-created inlth'e up
20
`well above the level L. Thus the down `stroke and may be threaded into the lower end of the
of the plunger 13a `results in the discharge of
a charge of liquid' into the string Tand the re
ception of a charge of gas in the barrel Ila above
40 the sealing elements .68 of the plunger. As 'the
cage 60. A central longitudinal ’opening 99`ex
tendsfthrough the member' 98 toplace the inte
rior _of the anchor |’2ab in 'communication'with
the valve seat. |00 of _the standing valve 66. VA
pluralityl'of Vlateral Yports ||l|is provided in the
ing` elements 68 is‘forced upwardly through the ` wall of the member 98 an‘d- places the opening
passage 90 and ports 92 to lift the valve 93` and 99 in“ communication with the‘passage 56. The
flow finto" the string TI‘. Upward movement of ports |-|l| Aare adapted to " admit ,fluidi fromfthe
plunger moves‘upwardly the gas ‘aboveits seal'
well into ‘the’ 'passage 56 yduringrthe down stroke 45
the‘lowerporti’on of the barrel ||2ab so that the of the plunger l`3a. The member 98 may be read»
valve ‘66. is unseated and liquid is ldrawn into .the ` ilyl‘interposed betweenïthecageßll and"v anchor
I2a of a typical well pump so that the pump -may
lower portion of the barrel. From the above it
will be apparent that the pump illustrated in embody‘a ¿typical standing valve and a typical
l'
"
Figs. 3 and 4 ofthe drawings is a double acting anchor.
59
' the plunger |3a ‘creates a reduced " pressure in
pump operable to displace a charge of liquid
Having described only typical preferred forms
into the string T during each down stroke of its
plunger lila and operable 'to displace Ya charge
of gas into the string TY during'each up stroke
and applications of my invention,- I do not wish
to be limited or restricted to the specific details
of its plunger; The charges ofA gas thus admitted
tothe tubing string T materially assist in raising
any variations or modifications that may appear 55
to those skilled inthe art or fall >within the scope
herein ’set forth, but wish to reserve to myself
or lifting the pumped liquid to the surface'. ï' The of the following claims.
„
'
y
barreli ||ß with its anchor l2ar and the plunger
' Having described my invention, I claim:
|35”` with` its valve 'Hlmay be typical well pump
1.` Well pump-ing apparatus including, a tub
parts andthe packing means 55 andthe meansv ing for conducting the iluid to the surface, a 60
I4 vmay comprise an attachment to adapt the barrel in the tubing having an inlet valve vat its
pump for the duty described above.' ‘
. ‘
Y lower end, aV tubular plunger reciprocable >in the
yFigs.'5 and Grof the drawings illush‘ate a form barrel and having a’ _discharge communicating
ofthe invention adapted to handle liquidv orv oil with the tubing, a traveling valve on the plunger,
A ‘ . during each stroke of its plunger."
In thezpump
illustrated in Figs. 5 and 6 'the barrel, Ile, the
plunger |321, the packing means 55 and the valves
88 and 93 -may be identical with the correspond-V
ing elements of the- form' ofthe invention illus
70 trated in Figs. 3 and'4`and corresponding refer
‘ ence numerals will be‘ employed for such parts.
The pump illustrated in Figs. 5 and 6 differs from
the `‘structure illustrated in Figs. V3 and 4 in that
means sealing off between the barrel _and tubing
below theA discharge of the plunger, there being i
communicating ports inthe barrel `and tubing
below said means, an inlet Valve controlling the
port in thebarrel, and outlet valve‘means con
trolling communication between-the upper end
of the barrel and the tubing above the sealing
means.
`
‘
2‘.. In a double actingwell pump for use in the
the tubing string T is imperforate‘throughout 'well, a tubing for conducting the fluid to the
`itsliî-:ngtlr and the. collar 86 and tube4 8.5 are omit.. surface, a barrel extending into the tubing and
asY
6
2,131,822
having an inlet valve for` its lower end, atubular kberrand the interior of >the tubing, there being
plunger operable in the barreland having a dis
ports in the member and the tubing below the
charge communicating with the tubing, a working sealing means, and an inlet valve governing the
valve controlling the discharge from the plunger admission of fluid from the well through the port
DI into the tubing, the plunger discharging into the
in the member to the barrel.
tubing during its down stroke, means connecting
the barrel with the tubing‘and sealing between
the barrel and tubing below the discharge of the
plunger, there being a port in the wall of the
upper portion of the barrel,v a tube on said means
placing said port in communication with the well
above its liquid level, a Valve controlling said
port and open during the down stroke of the
plunger, and a valve governing communication
15 between the upper end of the barrel and the tub
ing open during the up stroke of the plunger.
3. An attachment for a well pump for use on a
tubing and having a barrel with a standing valve
and a reciprocable tubular plunger having a
20 working valve and operable in th'e barrel, said
attachment comprising a tubular part secured to
the upper end of thel barrel and having a port in
its wall, a tubular part secur'ed to the tubing and
surrounding the ñrst tubular part to provide Vva
25 space thereabout communicating with‘the port,
there being a port in the second tubular part
communicating with said space >to admit 'fluid
from the well to said space, `a valve controlling
the first mentioned port, and valve means govern
30 ing communication between the upper portion of
the barrel and the interior ofÍthe tubing.
4. In combination with a well pump including
a tubing, a barrel with an ‘inlet valve at its‘lower
end and a tubular plunger operable inthe barrel
35 and having a discharge valve, an attachment for
the pump comprising, a' tubular' member con
nected with the upper end ofthe pump barrel, a
tubular'extension on> the lower end of the’tubing,
packing means sealing between the-member and
40 the interior of the tubing extension, there being
ports in the member and tubing extension for
placing the interior of the member and the upper
end of the barrel in ‘communication with 'the
well, an inlet valve governing the admission of
45 ñuid to the barrel ‘through said ports, andan
outlet valve governing communication 'between
the interior of the member and the“ tubing above
the packing.
‘
'
‘
"
7. An attachment for a well pump for use on a
tubing, said pump having a barrel with an'inlet
valve at its lower endV and a tubular plunger op
erable in the barrel and having a discharge valve,
the attachment comprising, a tubular member
connected with the upper end of the barrel .and
forming a ñuid passage between the upper end of
the barrel and the tubing, an outlet valve govern
ing the passage of fluid through the member,
means sealing between the exterior of the mem
ber and the interior of the tubing, there'being
ports in the member and the tubing below the
sealing means, means placing the port in the tub
ing in communication with the well above the liq
uid level therein, and an inlet valve governing
,the admission of fluid from the well through the
port in the member to the barrel.
8. An attachment for a well pump for use on a
tubing, said pump having a barrel with an inlet
valve at its lower end and a tubular plunger op
erable in the barrel and having> a discharge Valve,
the attachment comprising, a tubular member
connected with the upper end of the barrel and
forming a fluid passage between the upper end
of the barrel and the tubing, means on the mem 30
ber sealing about the plunger, an outlet valve
governing the passage of fluid through the mem
ber, means sealing between the exterior of the
member and the interior of the tubing, there
being ports in the member and the tubing below
the sealing means, and an outlet valve governing
the admission of fluid from the well through the
portfin the member to the barrel.
- 9. A well pump for use on a string of tubing
including, a seat connected in the tubing, there -
being a port in the wallY of the tubing below the
seat, a barrel extending from the lower end of
the tubing, an anchor cooperating with the'seat,
a tubular member interposed between the 'barrel
and the anchor whereby the anchor suspends the
barrel, ‘a plunger operable in the barrel, said
member having a port in its wall, an inlet valve
in the member controlling its port, and an outlet
valve controlling the passage of fluid through the
5. An attachment for a well pump for-use on
50 a tubing, said pump having a barrel with an inlet _ member from the' barrel into the tubing.
50
valve at its lower "end and a tubular plunger oper
10. A well pump for use on a string of tubing
able in the barrel and having a discharge valve,
the attachment comprising, a tubular member
connected with the upper end of the barrel, pack-~
55 ing means sealing between the member and the
interior of the tubing, means for actuating the
packing following the anchoring of the pump,
there being ports in the member and tubing for
placing the interior of the member and the upper
60 end of the barrel in communicationl with the well,
an inlet valve governing the admission'of fluid to
the barrel through said ports„and an outlet valve
governing communication between the interior of
the member and the tubing above the packing
65
means.
K
,
-
6. vAn attachment for a well pump for use on a
tubing, said pump having a barrel with an inlet
valve at its lower end and a tubular plunger op
erable in the barrel and having a discharge valve,
70 the attachment comprising,` a tubular member
connected with the upper end ofthe barrel and
forming a fluid passage between the upper end
of the barrel and the'tubing,- an outlet valve gov
erning the Vpassage of ñuid through the member,
75 means sealing’between the exterior of the mem
including, a seat connected in the tubing, there
being a port in the wall of the tubing below the
seat, means for maintaining said port in com
municationA with the well above a liquid level in 55
the well above said port, a barrel extending from
the lower end of the tubing, an anchor cooper
ating with the seat, a tubular member interposed
between the barrel 'and the anchor whereby the
anchor suspends the barrel, a plunger operable 80
inthe barrel, said member having a port in its
wall, an inlet valve in the member >controlling
its port, and an outlet valve controlling the pas
sage of fluid through the member from the barrel
into the tubing.
65
11. A double acting well pump for use on a
string of tubing including, a seat connected in
the tubing, there being a portl inv the wall of the
tubing below the seat, a barrel extending from
the lower end of the tubing, an anchor coop 70
erating with the seat, a tubular member inter
posed between the barrel and the anchor whereby
the anchor suspends the barrel, means packing
-between said member and the tubing, means
maintaining said port in communication with the 75
7
2,131,822
well above a liquid level therein higher than said
port tosupply gas to said port, a plunger oper~
able in the barrel, said member having a port in
its Wall, an inlet valve in the member controlling
its port, and an outlet valve controlling the pas
sage of fluid through the member from the barrel
into the tubing.
12. A well pump for use with a tubing having
4a shoe and a port above the shoe, said pump 'in
10 cludíng, a barrel in the tubing, an anchor on the
barrel cooperatingA with the shoe to support the
barrel on the tubing in spaced relation to its wall,
a plunger operable in the barrel, a tubular mem
ber on the upper end of the barrel having a port
in communication with the first mentioned port,
means sealing Said ports, an inlet valve governing
the passage of fluid through said ports to the
barrel, and an outlet port controlling the flow
of fluid through said member from the barrel.
13. Well pumping equipment comprising a tub
20
ing for conducting the pumped fluid Vto the sur
face, a shoe on the tubing, the tubing having a
port above the shoe, a barrel in the tubing,r an
14. Well pumping equipment comprising a tub-v
ing having a shoe, a barrel extending through the
tubing with clearance, an anchor assembly on
the barrel cooperating with the shoe to support
the barrel, said assembly being ported to main Ul
tain the space between the barrel and tubing in
communication with the well, a tubular plunger
operable in the barrel, means sealing off the up
per end of said space from the tubing above the
barrel, means for compressing the sealing means,
means maintaining the last mentioned means in
operative during movement of the pump through
the well, the upper portion of the barrel being
ported to communicate with the said space, valve
means governing the admission of ñuid to the
upper portion of the barrel from said space, and
valve means governing the passage of fluid from
the upper end of the barrel to the tubing.
15. A double acting well pump comprising a
tubing for conducting the pumped fluid, a barrel 20
having an inlet valve for its lower end, means at
the upper end of the barrel for locking the barrel
to the tubing and releasable to allow upward
anchor on the barrel cooperating with the shoe ` Withdrawal of the barrel from the‘well, a tubular
to support the barrel on the tubing in spaced
relation to its wall, a plunger operable in the
barrel, a tubular member on the upper end of
the barrel having a port in communication with
the first mentioned port, means sealing between
30 the tubing and the member above said ports,
means maintaining said ports in communication
with the well above a liquid level higher than
the port in the tubing to deliver gas to said ports,
an inlet valve governing the passage of fluid
through said ports to the barrel, and an outlet
port controlling the flow of fluid through said
member from the barrel.
plunger operable in the barrel and having a dis
charge communicating with the tubing, a work
ing valve controlling the discharge from the
plunger into the tubing, said means having ports
for admitting fluid from the well to the upper
portion of the barrel, inlet valve means control 30
ling said ports, and discharge valve means gov
erning communication between the tubing and
the upper end of the barrel.
HERBERT A. SCHMIDT.
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