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Патент USA US2038441

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April 21», 1935- _
April 21, 1936.
Filed Feb. 24, 1935
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EMM [email protected]
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April 2l, 1936.
Filed Feb. 24, 1953
4 Sheets-Sheet 5
7H. man“
April 21, 1936.
Filed Feb. 24, 1933
4 Sheets-Sheet 4
EMAB Wßaïfßzeäazv
Patented Apr.. 21; _1936 _
_ 2,038,441
UNITED l s'm'rss- _PATENT oFFlcE y
Edgar W. Patterson, Long Beach, Calif., assignor,by direct and'mesne assignments, of one-half
to Margaret D. Patterson, Long Beach, Califl,
_ and one-half to Chas. M. O’Leary, "Jr.,- Los '
Angeles, Calif.
Application February 24, 1933, Serial No. 658,315
13 Claims.
This invention relates to a fluid lift pump
especially adapted for use in elevating iluids from
cil wells and the like.
In the operation of ‘oil‘wells- to obtain produc5 tion of oil therefromit is the usual practice to
»installi a plunger pump mechanism within the
Awell in order to elevate the liquid therefrom.
(Cl. 103-231)
\ e
independent of_ well pressures, or submergence,_
and the motivating gas may be either that de-`
' . veloped in the well itself,`or supplied from exter
n'al sources. It will be noted as one of \the prin
cipal .accomplishments of this device that due to d __
the junction of'a foot valve, hereinafter described,
the deviceis not aiîected by the depth to which
Such an installation is quite expensive to manu- _ it is submerged in fluid in a well, and will start
' facture and to operate, and under certain condi- to function initially under substantially the same
-10 tions, such as when' usedin a well of great depth
numerous other problems arise which usually
pressure as will be required at any time there- l0
after, consequently not requiring the'` commonly
makes such apparatus decidedly complicated _in known “High kick over pressure” due to an excess
operation, While requiring considerable adjust- initial submergenoe.
ment and manipulation to obtain an optimum
It is another object of the present invention
l5 :dow of iluid from the well. In the oil well in- to provide means Whel‘eby the fillid under PreS- i5
dustry lt usually occurs that the' oil which is to _, Sure after having performed useful Work in ele
. be drawn from the well is commingled with'gas, vatine liquid may be exhausted from the appara
_ and while the gas may not be of sufdcient pressure
- ' to'lift the liquid to the surface of the ground, yet
20 it may he utilized to exert a beneficial pressure
which may be built up to overcome the hydro-
static head of the liquid in the well irrespective
tus against a reduced hydrostatic head from that
existing- at the point Where its „work was accom
plished, whereby maximum pumping efneienoy of 20
the apparatus may be obtained-
The Present invention oonteniplates the pro
of the amount of submergence` of the liftv tube, ‘ vision of a iluidl actuated 4pli-nlp mechanism
and which pressure may be utilized to lift the adapted to be lowered into a >well casing upon a e
2_5 liquid from the We11_ It rs the principe] object
of the present invention, therefore, to provide
e, fluid lift apparatus which may be introduced.
into en oil well shaft to e desired depth of suh-A
mergenee, and which will- e'et to lift the hquld
30 column by means of Igas under pressure sulcstuntially-less thanl the normal static head pressure
ldeveh-,ped by a solid- commu of uuid the depth
of 'an average oil well of approximately 4000 feet,
thus developing a. Statie pressure cf approxi35 mately 1500 pounds per square inch, pressures`
as _high as >this arel commerciany impractical in
oil well practice. It will be readily understood,
however, that the device es it will be disclosed is
readily'adaptable for use atshallower depths, as
40 in water raising systems wherein the device can
be'used 1n the fprm of e, direct displacement pump
motivated by ’gas under sumcient pressure to
overcome the static head pressure developed by
tubing string, .and-to be set at a pre-determined 25
degree 0f .Submergenee’ which device may then be
caused to automatically operate under the im
'Pulse 0f the fluid Under Pressure Within' l511e Well
to elevate the liquid and pump it to a point above
the ground level where it may be drawn oiî into 30
desired Storage eenteinere
The invention is illustrated by wayof example
in the accompanying drawings, in Whiehï.
Figure 1 is a view in central longitudinal section
through the lower portion of the main tubing 35
string and the upper portion of the ñuid lift ap
Daratus, particularly disclosing the gas pressure
Chamber and o portion of the valve mechanism.
Fig. 2 iS a View in Central longitudinal Section
With Parts in elevation disclosing the adjacent 40
length of the ñuid lift apparatus to that shown in
Fig. 1 0f the drawings, further indicating the
details 0f Construction 0f the* 'beianeed Pisten.
the column of fluid being raised.
It is a further object of the invention to provide
valve and the-regulating float.
Fig. 3 iS a VieW in central longitudinal Section 45
e uuid lift apparatus of the ges or air motivated
and elevation showing thel portion of the uuid
_ type, that will _be capable ofv attaining a higher ' lift Dump aS it Ooonl‘SY at the loWei‘ end of the
< degree of eiliciency f_rom a power consumption
. standpoint than that 'attained by the present gas
,50 ha systems, by making it ppssibiete supply the
maximum quantity of fluid that agiven volume of
gas is capable of aerating and propelling to, the
surface or top/of a well.
It wilL-'be obvious to those familiar with the art,
, 5
structure and particularly disclosing the details
of construction of the foot valve mechanism. It
win be understood that Figs. 1, 2 and 3 are sup- 5°
plemental to each other, and that they indicate
the entire fluid lift pump structure with the re
lationships of the parts shown asv they exist
when the main pump chamber is substantially
that -this_devlcc as _disclosed operates ’absolutely empty.v
v-Fig.4 4 is a view in central longitudinal sec[tion through the portion of the fluid lift pump
mechanism as shown in>- Fig. 1, disclosing the
parts in their transposed positions as will occur
when the liquid chamber is filled.
Fig. 5 is a view similar to Fig. 2, showing the
lower parts ofthe balanced valve and the float
as they will appear when the liquid chamber* is
admitted4 to- saidv chamber from the top of the
-well by Way of the annular space between tub
ing string I6 and flow string 29. .The pressure
inlet tube to the main flow chamber 83 is formed
with a plurality of perforations 2I through its
wall near its upper end, so that the tube 2l) will
act as' a sieve and prevent extraneous matter
from lpassing from the pressure 'chamber and
scale trap I9 into the piston valve, and conse
partially filled.
Fig. 6 is a view in longitudinal central section i quently clogging the apparatus. The lower end
of the gas pressure chamber‘and scale trap I8
similar to Fig. 3, showing the parts of the foot
valve mechanism as they will appear when the
liquid chamber is filling.
is closed by a sub-head 22 to which the tube sec
tion 20 passes. The sub-head has a central pas
sageway 23 extending downwardly through the.. y
' Fig.` 7 is a view in transverse section through
the gas pressure chamber'as seen Aon the line
1-1 of Fig. 1.
tubular extension 24 and terminating at its up
per end in a counterboredportion 25 which is
threaded to receive the end of an aspirator tube
Fig. 8 is a viewing-transverse section in ele
vation as seen on the line 8-8 of Fig. 1, show
26 which .extends upwardlyl through the main
string I6 and is _formed with a central
ing 'the various exhaust and .pressure passage
passageway 21' in communication with and inl
20 ways in the main valve head;
Fig. 9 is a view in transverse. section through longitudinal alignment with the central pas
sageway 23 vof the sub-head 22. The aspirator
the main valve head as seen on the line 9-9 of
Figa 1.
tube 26_ is formed at pre-determined intervals
throughout its length with jet openings 28 by
Fig. l0 is a view in transverse section thrpugh
which fluid under pressure may be introduced 25
into the central passageway 21 of the aspirator
the main valve head as seen on the line Ill-_40y
of Fig. 1.
Fig. 11 is a view in transverse section through
the main valve head as seen on the line II-II
of Fig. 2.
tube -in a manner and for a. purpose to. be here
inafter set forth.
_ Fig. 12 is a view in transverse section showing
the float structure as seen-on the line I2-I2
of Fig. 2.
The aspirator tube 26 tele
'. scopes». into an adjusting sleeve 29 which has a
Fig. 1.3 is a view in transverse section through
the foot valve structure as seenv on the line
35 I3-I3 of Fig. 3.
Fig. 14 is a view in longitudinal section and
elevation with parts broken away, generally in
dicating the complete assembly, and further
showing means for regulating the jetting effect
40 of the fluid under pressure from a point above
the ground.
central bore forming a snug sliding fit with 30
relation to the outer diameter of the aspirator
tube, so that by longitudinal adjustment of the`
sleeve with relation-to the tube a desired number
of jet openings 23 may be uncover/ed and thus a
controlled amount of iluid under pressure may 35
be introduced into the column of liquid passing
upwardlythrough the central passageway 21 of
the aspirator tube. The)sleeve 29 may be longi
tudinally adjusted from a point above the ground
in any'manner, such for example, as shown in 40
Fig. 14 of the drawings.
to the lower side of the sub-head 22
Fig. 15 is a view showing the complete pump is Secured
a relatively short casing length 30 which forms
an exhaust transfer chamber 3| around the tu- '
Referring more particularly~ to the drawings, _ bular extension 24 of the head. `Thelower end '45
I0 indicates a well bore which may be fitted of the casing section 30 is attached to the upper
with a suitable casing II, and through which end`of the main valve head 32. This valve head
» an exhaust space tube I2 may extend. This tube '
formed with a central liquid eduction passage
is substantially concentric. with the well casing is
way 33 in longitudinal alignment with the pas
and is suñiciently smaller in diameter to permit sageways 23 and 21, and being in effect a' con 50
the structure to be readily introduced into the f tinuation thereof. Disposed'eccentrically of the
` accumulated liquid within the’well, arid to at
passageway 33 is the valve head 32, and extend
tain a desired degree of submergence. It will ing through this head _is a cylindrical -bore 3_4
be understood, of course, that the exhaust space
which'receives a'balanced piston valve 35. This
tube I2 is formed in lengths appropriately cou
piston valve may reciprocate longitudinallyA with- '
55 pled together to extend from the desired point of
this bore and will act Ato control the inlet of
pumping operation to_ a desired point of exhaust in
pressure gas and the educ-tion of liquidv from the
which may be above the ground or at a pre-de
fluid lift chamber, and the exhaust of spent
termined level therebeneath. I
pressure fluid, and the refilling of the iluid 60
Mounted upon the lower end of the exhaust _
The valve comprises two cylindrical
space tube I2 is a top adaptor shoe I3 to which . chamber.
portions; an upper one indicated at.36','and a
various parts of the fluid lift apparatus are at'
lower portion indicated at 31. These portions
tached, and by' which they are anchoredk This
adaptor shoe is formed with an upper bore I4 to
receive the threaded end of' the tube I2, and a
65 bore `of reduced diameter receive the lower
end of the main tubing string I6. This string
is of considerably smaller outside diameter than
the inside diameter of the exhaust space tube I2,
thus creating a concentric exhaust passageway
I1 to accommodate the pressure fluid in a man
ner to‘be hereinafter explained.
The lower end of the top adaptor shoe I3 is
connected with a tubular and cylindrical pipe
75 I8 forming a gas pressure chamber I9, gas being
are , connected by a stem 38 of considerably
smaller diameter, which forms a bypass passage- . A
way to permit communication of certain bores
in the valve head 32 when the piston valve‘35 is 1
reciprocated Afrom one extreme position to-thé'
other. The upper end of thecylindrical bore“ .
for the piston 35 is closed by a plug 39.
Formed at diametrically opposite sides o_fî‘the>
valve head 32, as indicated in Fig. 8 of the d;
ings, is a pair of exhaust passageways 40 and'lH.
These passageways extend longitudinally of the
valve housing and parallel to the central axis'
thereof. The upper ends of these exhaust pas
6| with relation thereto. The upper end of the
¿sageways communicate with the exhaust trans-y sleeve 6| is formed with an annular shoulder 62
‘ fer chamber.3|.v 'I‘he upper end of the exhaust
which extends outwardly and into a groove 63
transfer chamber is ñtted with a plurality of ex
formed in the side faceîif the valve stem 53, and
haust transfer tubes 42 which extend‘upwardly which groove terminates `at its upper end in a
through the pressure chamber |9 and communi
lshoulder 64, and 'at its- lower end-in a shoulder 65.»
cate with passageways 43 to adaptor shoe I3, .'I‘he length of the groove as defined by the distance l
which -passageways are in conununication with between these» shoulders is here shown as being
thev exhaust rspace |'| occurring between the ex
substantially twice the width of the Vannular
r10 haust tube I2 andthe main tubing string I6.' The shoulder 62 on the sleeve 6|. 'I'he sleeve 6| is also
lower ends of the exhaust passageways 40 and 4|
formed with an internal shoulder 66 which will
in the main valve head 32' do not extend through
encounter the abutting face of the external -shoul
out the entire length of the head, but terminate der 61 upon- the lower end of the mandrel.` This
. at a point short thereof to communicate with a
laterally extending exhaust port 44 which com
municates with theyalve piston bore 34. Extend
' ing upwardly from the lower end 'of the main valve
head 32 is a pair of pressure passageways 45 and
46. 'I‘hese passageways do not extend the entire
length of the valve head, but terminate» with the
laterally. extending chamber port 81. vThis port
communicates with the valve bore 34 and when
permits the mandrel 58' in the housing 6| to have
limited longitudinal movement with relation to 15
each other when assembled, but does not allow
them to become separated.
A pair of ‘annular ball grooves 68 and 69 are
formedV around and in the outer face of the man- `
drel 58', and are intended to alternately receive 20
lock ballsv1|l which are mounted in radial pas
sageways 1| formed through the shoulder 62 at
the piston valve 35 is in ‘the -position indicated in vthe upper end of the sleeve 6|. These balls are I
Fig. l 'of the drawings, the shoulder 48 occurring , yieldably ‘held by springs 12 which may be ad
at the- upper end of the portion 31 of the pistonA justed by adjusting screws 13. This makes it 25
will register with the lowerïedge of the chamber possible to impose a desired tension upon the balls
port 41, and the spindle-portion 38 of the piston so that there cannot be displacement of the fric
_valve will cause a passageway 49 to occur around tion mandrel 58’ with relation to the housing 6|,
the spindle and within the bore 34 to permit the until a pre-determined longitudinal pressure has
pressure iluid to communicate with a pressure
port 58 formed in the valve head 32, and which
port is in communication with the pressure cham
ber tube 28..
By examination of the drawings it will be seen
that the exhaust port 44 is disposed at a point
below the chamber port 41, and that the space
between the portions 38 and 31 of the piston valve,
as defined by the length of the spindle 38, is such
as to insure that the chamber port 41 may be
either _in communication with the exhaust port
44 or with the pressure port 58.
lThe piston valve 35 is formed with a central
bypass duct 52. This duct tends to break the seal
which might .otherwise occur between the upper
end of the piston valve and its closed cylinder,
@and will provide equal hydrostatic pressure at
been set up to cause relative longitudinal move
ment between the ymandrel and housing.
A lock nut 68 normally rests against the upper '
end of' a ñoat tube 14, through which the educ
tion tube 59 extends and with relation to which
the iioat tube 14 may have longitudinal recipro 35
cable motion, 'I'he -i‘loat tube is disposed centrally
of a hollow ñoat 15 which comprises a cylirïdri‘cal
outer wall 1,6 closed at’ its opposite ends by heads
11 and 18.
The foot valve structure previously described, 40'
as Well as the friction mandrel 58,- the friction
sleeve 6|, and the float 15, are included within a
tubular casing 19 which extends downwardly to
a foot valve housing 80, carrying a foot valve ball
The'ñoat 15 is 45
8| adapted to rest on a seat 82.
designed to respond to the level of liquid within
l'opposite ends of the valve so that the valve will the main liquid chamber 83', as dei-ined bythe
be balanced and can move without the resistance casing 15|,v and due to the If_act that conditions of
of any hydrostatic head or pressure which might excessive hydrostatic pressure will prevail within
...50 occur yaty either end of the valve, orthrough the l the main liquid chamber 83 the float is ñlled with 50
valve housing ports.
~ .
fluid underv pressure which pressure will be equal
'I'he valve is provided' at its lower endwith a to the maximum pressure exerted externally upon
. vvalve stem 53., shown particularly in Figs. 2 and 5 the float wall, it beingunderstood that the wall
of the drawingsí This valve stem- is actuated by will be of suñicient strength to prevent bursting
' a. mechanism which will> now be described.
of the float due to its internal pressure. The ñoat 55
Mounted at the lower end of the piston'yaite is lalso designed so thatA its weight will be sub
head 32 is an eduction tube nipple> 54, which'is stantially half that of the liquid which it displaces.
formed with a central tubular opening commu
'The upper end of the float tube 14 projects be
nicating _with and in alignment with the central yond. the head 11 to encounter the' lock nut 60. >
eduction ' passageway through the valve head. This nut issplìtì'so that it will readily clamp upon 60
The tubular’ nipple 54 is formed with the upper lthe eduction tube 59 at a desired pre-determined
' end of an eduction tube valve housing 55, which
is tubular in shape and extends downwardly to
accommodate a valve seat 56 for the bore 58 of an
eduction tube foot valve. Thelower opened end
of the valve housing 55 receivesv the threaded end
ï of a. bali friction mandrel 58’. 'I‘he central bore
of the mandrel is provided to receive the upper
end of eduction tube 59. The eduction _tube tele
70 scopes within the bore ofthe mandrel and carries
a-nut 60 which- is threaded intothe lower threaded
end >of a ball friction sleeve 6|, which telescopes
over the ball friction mandrel 58’. The lower end
of the Amandrel 58' is formed with an enlarged
l75 lshoulder which limits the movement of the sleeve
Mounted upon the @duction tube at a point be- .
low they float 15 is a fluid controlcollar 84 which. `
will be encountered by the lowen projecting end 65
of the ñoat tube 14 when the float isin the act
of moving to its lowermost position, as indicated'
by dotted lines ’in»'„Fig."6 ofthe drawings.'y C_This
collar controls the Ydistance-the float ,can travel,
and consequently the.volume of iiuid per j_cycle.
-The volume per cycle ‘will _be calculatedvif'...a-d;
Vance with reference to the expected production,
submergence, etc.
The eduction pipe 59 telescopes into the upper
` end of a lock nut 85 by which it is rigidly clamped
and fastened to sleeve 86 of the foot valve struc
` ture. This sleeve telescopes overl a tubular man
drel 81 of the foot valve structure and has a
tight sliding ñt with relation thereto. „ The lower
end of the tubular mandrel is fastened to the
During such a time the ball friction mandrel 58'
and the ball friction sleeve 6| will be in the posi
'tion shown in Fig. 5 of the drawings, so that thev
lock balls 10 will be in engagement with the lower
lock ball groove 69. The spring tension of the
ball springs 12 is sufficient to insure that there
member v8|! of the foot valve.- The upper end of
the tubular mandrel is closed, save for a laterally
extending port 88 through its side wall, which is
10 shown lin Fig. 3 of the drawings, as being closed
by the overlapping portion of the sleeve 86. This
sleeve- is formed with an incoming fluid portv 89
which may move to register with the port 88 of
will be a differential in the resistance of the
springs and the buoyancy force of the float vof
approximately 20 pounds, so that the upward
movement of the float will be resisted until this
amount of force has been created in holding the
float down, and after which the balls 1l]v _will
be forced from the lower ball groove 69 and the
friction sleeve 6| will be violently moved upward
the mandreL‘as shown in Fig. 6 of the drawings, ly until the balls 18 register with the upper ball 15
and during which time the passageway through groove 68 on the mandrel. This action will not
the mandrel may communicate with the main',l be produced, however, until the fluid has been liquid chamber 83 through the incoming huid elevated to a point where the upper endl of the
port-89 and an annular passageway ‘98 which float tube 14 encounters the lock nut 60 which ,
occurs between the contiguous walls o_f the man- . is secured in the lower end of the ball friction 20
20 drel 81 and the sleeve 86 due to~a difference in
sleeve 6|. Attention is directed to the fact that
their diameters. .
until the friction ball sleeve and mandrel have
The sleeve 86 is formed with an enlarged shoul
been thus tripped, the eduction pipe 59 will be held
der 9| at its upper end, beneath lwhich a balanc
in its lowermost position. During this time a hy
ing> spring 92 is seated. ThisXspring being helical drostatic head is being built up by the column of 25
25 in formation and extending downwardly to seat 'liquid filling into the main chamber 83 of the
at its lower end upon a shoulder 93 formed near device. When the buoyancy of the iioat 15 in
thebase o_f the mandrel 81. The tension of this the main chamber 83 has increased to a degree
spring being just suf?cient to balance .the weight sufllcient to overcome >the frictional resistance
`of the parts resting upon it,--foot valve cage, between the~ lock balls 10 and the lower lock 30
30' eduction tube, nuts, ball friction cage, etc. The
groove 69, the resistance to relative movement ~
valve ball 8| is limited in its motion by a ball . ofthe friction ball sleeve 6| and the mandrel 58
pin 94 which extends across the valve housing will be instantly released, thus permitting the _
88 at a point directly beneath the base of the buoyancy of the float 15 to _force the .friction
ball sleeve upwardly to its upper locked, position 35
If desired, the lower tubular end of the foot as shown in Fig. 2 of the drawings, and without
valve housing or bottom shoe 80 may be fitted' any possibility that thesê parts will assume any
with a casing .member 95 which may be used1as intermediate unlocked' position with relation to '
an- extension for a tubing catcher.
each other.
,In operation of thepresent invention the lift L Prior to the application of sufficient pressure 40
mechanism is mounted at the lower end of the upon the friction ball sleeve 6| to cause it to
exhaust tube I2, and is also connected to kthe be released from its lowermost position, the valve
main tubing string |6. -Extending downwardly stem 53 of the piston valve 35 will be in its lower
through this tubingstring from a point above most position with the lower face of the shoulder
the ground is the aspirator» regulating the flow 62 in engagement withy the shoulder 65 of the
45 tube 29. The assembled structure is lowered into
valve stem recess 63. At this time the piston valve
the well to any desired> depth of submergence.
35 will be in its lowermost positionso that the
It will be understood that the lower the op
portion of the piston valve which is reduced in
erating point is beneath the fluid in the well, diameter and which occurs around- the spindle
the greater will be the hydrostatic head of fluid 38 and between the enlarged cylindrical portions 50
50 upon the apparatus. It will be assumed that when
the device is setA in operation there will be no
fluid within the main chamber 83, and that as
the foot valve structure 80 is fsubmerged in the"
liquid it will lift the valve ball 8| and tend to i'lll
the central passageway of the foot valve mandrel
81. At this time the float 15 will berestingupon
the fluid regulating collar -84 to force the educ
tion tube 59 downwardly, at. the same time com
pressing` the foot valve spring 92, and moving the
sleeve' downwardly until it reaches the position
indicated in Fig. 6 of the drawings, when the ex
haust is open to low pressure area. Here it will
` be seen that the yupwardly moving fluid will travel
through the central passageway of the foot valve
65 «mandrel 81 and may then pass outwardly through
the lmandrel opening 88 intothe annular passage
g way 98 occurring between the upper reduced end
of the mandrel 81 .and the inner wall of the foot
‘.valvef- sleeve 86. This; fluid will- then flow up
wardly into eduction tube 59. At the same time
the fluid _from the mandrel 81 will flow outward
ly through the fluid port 89 in the foo't valve sleeve
86 and will tendïto fill ~the main chamber 83 of
the pump. .As?the level „of> liquid „within this
75 chamber 'rises,'the„iloat_' ‘l5I will begin -to rise.
36 and 31 of the valve will be in its lowermost
position as shown in Figs. 4 and 5 of the draw
ings, thus permitting communication between
the main fluid chamber 83 and the exhaust space
between I2 and I8 by way of the intermediate 55
chamber port 41 and the exhaust port 44. This
establishes communication between the exhaust
passageways 40 and 4| and communicates with ex
haust transfer chamber 3| and the pressure pas
sageways 45 and 46 within the head and opening 60
int'o chamber 83. With the piston valve in this
position, it is evident that the chamber may ñll
withiluid readily under a pressure equal to that.
at the top ofthe exhaust space, etc.
When the .
friction ball mandrel 58’ and its sleeve 6| are 65
released from their distended relation and move
toward their telepscoped position, the shoulder
62 on the sleeve 6| will have a short period of
lost motion represented by the distance of travel
from engagement with the lower shoulder 65 of 70
the valve stem to _a position where it encounters
the upper shoulder 64 on the valve stem 53. When
the upper shoulder 54 is encountered, the valve
stem and -its piston valve 35 will be instantly
moved to its uppermost position. At this time
2,038,441 ' f
the piston valve will be shifted from- the position
indicated in Figs. 4~and5 of thev drawings, to
eduction valve ball 5l will seat and will cause
a column of liquid to be entrapped in the pas
_ the position indicated in Figsj'l- and 2 ofthe
sageway above the valve. The height of this
This will cause the chamber port 4l - column will be in direct ratio to the quantity of
to be placed in communication with the pressure
liquid which had been` impounded. within the
port 50, andsince the chamber port is in com
main pump chamber 83; When thev liquid level ~
munication with , the pressure. passageways 45
within the main'pump chamber 83 lowers, the
and 46,“the fluid under pressure within the p_res-,
float 15 will correspondingly lower and will re
sure chamber i9 and the gas'pressure area be
cede from .a position in engagement with the
lower face- of the lock nut 60. The ball friction jo t
10 tween the inside of the main tubing string i6
and outside of aspirator orl manually controlled sleeve 6l andthe ball friction mandrel 58' will
flow string 29 will enter the space above the ñuid not move from the position indicatedlin Fig. 2,
in the main displacement chamber 83. So long - however, until sumcient weight has been im
as there is a slight differential in pressure between
15 that admitted to'l the main„fio_w or `displacement
posed upon the fluid 4control collar 34 to overcome
the friction existingbetween the vlock balls 13
chamber l83, and the pressure constantly prevail-. and the uppergroove y68 on the'ball friction f
ing inside the aspirator tube and flow column,4 , mandrel 58', at which time anew cycle of oper
it lis" evident -that like fluid inside the main ation will be imparted to move the various parts
, chamber 83 will be forced up through the educ ‘ to the positions shownl in Figs. 4, 5, and‘ö of the
tion tube by way of ports 89 _in the foot‘valve drawings. Y
- yhousing and be carried away -to the surface by
Attention is directed to the fact that the col
the constantly- incoming gas at the aspirator L umn of liquid passing through the aspirator tube
.\ tube. 'As the fluid level in the mainchamber 26 will. be aerated by the fluid admitted through
83 lowers the ñoat will also- lower, leaving the the passageways 28 in the wall of the tube, and
piston'valve and foot valve mechanism held inr that by regulation of the aspirator sleeve 29 the
their respective positions by the ball friction >de
amount of fluid required for this purpose may be
vice together with »the weight. of all the parts accurately controlled so that >the fluid will not
being balanced, and therefore of no consequence L blow through the column of liquid, but will add
or detrimental value, by the balancing spring 82. , its pressure to the liquid in elevating the same,
As, the iiuid reaches a predetermined low level, thus creating a true fluid lift operation which is r3o l
the lioat will engage the ~stop or regulating collar at all ‘times within. the control of the operator
84 and come to rest upon said stop until such
above vthe ground.
time .as the ñuid will have lowered away under t . It will be understoodv that the pumping struc
the float, until a weight value of approximately
ture here shown operates while submerged with
20 pounds has been reached. As above stated, a
thrust or weight value of approximately 20
in a column of liquid within ya well. This col
umn may vary in height and may extendfor a. .
pounds 'willi cause the ball friction to release,. considerable distance. above the pumping mech- '
anism. Under ysuch conditions it will befrecog
piston valve from that of admitting gas under nized that the pressure head of the column of'
thereby instantly reversing the position ofthe
v pressure to that of exhausting the gas used to
force the iiuid from the chamber to a predeter
mined- lower pressure, in order that the chamber
. liquid within the well will be in proportion tov 40
its height, and since the exhaust pressure of the
the ' pump~
may again rapidly lill with iluid from the well
through the exhaust tube l2 will l'be llimited in
under a predetermined static head pressure. pressure, it will be‘necessary to extend theex
Simultaneously with the piston valve movement haust pipe `I5 upwardly into the column of liquid
occurs theffoot valve movement from a closed ' within the well to a point where the pressure
-position to an open position, and the cycle is re
head of this column of liquid will be low enough
-peated as before. In so far as the normal cycle ' to allow the exhaust gas to pass upwardly into
of operation is concerned, the foot valve per
forms no function that an ordinary ball .valve
would not perform. Theoretically, the foot valve
- can be dispensed with and the ball valve will an
swer the purpose, as it will admit'fñuid lto the
chamber .when the pressure within is .reduced
below-the static head pressure of fluid outside
’the chamber, and will seat and holdv when the
pressure is applied within the chamber. There
fore the only` function of the foot valve is in
closing- the chamber to any more incoming iluid
after the ñoat has been raised> sufliciently to ac
tuate the piston valve and the foot valve. The
function of this foot valve then becomes one of
stopping the fluid from seeking'a level both in
the well. Since this is theconditio'n which exists
it will be evident that in different wells the pipe
l2 may be of different lengths.
- . '
It will also be evident that due tothe fact that
excessive pressures occur upon various opposed
surfaces of the piston valve 35, that the bypass
duct l52 therefor will break any seal between Athe
opposite ends of the valve member, and balance “
the pressure so that the piston valve 35 may op
erate with the same freedom as though `it were
moving in 4conditions of yuniform atmospheric
It wil1,thusY be seen thatthe apparatus here;
disclosed provides simple and effective means for
lifting and expelling liquid from an oil or water
side and outside of the device at the time it, is I well while tilizing the beneñcialforcas produced
lowered into the well, or at any time thereafter by the h ldrostatic head of the liquid within 65
that it may be necessary to release all gas pres- . which the device is submerged, and the gas _pres
sure from the device. .This valve function thus
sure which may occur in the well, and that the de
.eliminates the ,common high-kick over pressure
vice may be controlled and adjusted from a point
abov’ethe/ ground to >insure that it will operate
met with in all flowing devices that are initially
v. submerged to any appreciable depth in fluid.
It lends to the device the characteristic of normal
initial operating pressure.
eñiciently under conditions as they'may uniform
ly occur in a'well, or to meet emergencies arising -
v from varying conditions created by change in-the
When the pressure of theI hydrostatig;A head of ` flow of the well and diiferences in gas pressure. .
liquid within the main pump chamber~83 and
yWhile I have shown the preferred form of my
the fluid pressure -thereinhas :been spent the,v invention, as nowknown to me, it will be under--y
, _
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 my invention vas claimed.
Having thus described my invention, what I
claim and desire to secure by Letters Patent‘is:
1~ In a device of the character described, a
fluid lift pump adapted- to be positioned in a
well shaft at a determined degree of submer
10 gence, valve means for controlling the iiow of
tor tube and into which liquid said ñuid is being
ond string of tubing connected with said pump
and through which fluid under pressure may be
elevated from the well into the liquid in which 10
the pump is submerged, a main fluid chamber
adapted to communicate With the pressure fluid
liquid from the Ywell shaft into the pump, means
for conducting iiuid under pressure from a point
above the level of theliquid in the well to said
pump, means for conductingv liquid from the
tubing and with the lifted liquid tubing, valve
means interposed in the line of flow of said pres
sure fluid to the main liquid chamber whereby
pump to a point above the level of the liquid
the now of pressurev fiuidlmay be interrupted,
within which it is submerged, float operated
means for bringing the air under pressure into
lifting relationship to a quantity of liquid intro
duced into the pump and for interrupting the
20 flow of air under pressure when said quantity of
means for introducing liquid to the main. liquid
chamber, means for' interrupting the flow of liq
uid into said chamber and a`iloat within the
chamber simultaneously and alternatelyacting
clusion of said float operation for exhausting theA
er than that at which the pump structure is posi
to open the liquid pressure valve and to inter
` liquid has been forced into the liquid conducting
' means, and for interrupting said liquid inflow
through the controlvalve and means at the con
25 spent pressure fluid into the well at a point high
4. A Adevice of the character described, com
prising a string of tubing at the lower end of
which a fiuid lift pump is attached, means at the
upper end thereof to supply a pressure fluid
through the .tubing to the fluid lift pump, a sec
rupt the flow of liquid into the main liquid cham
ber whereby the pressure fluid may be admitted
to the main liquid chamber to elevate a quan
tity of liquid entrapped therein and to cause it 25
oto be lifted through the liquid lift tube, means
`constantly introducing the pressure fluid into>
the column of liquid being lifted, and means for
2. In a device of the character described, a fluid , exhausting the pressure fluid from the ,main liq
lift pump adapted to be positioned in a well shaft uid chamber as liquid enters thereinto.
at a determined degree of submergence, means
5. A device of the character described, com
for conducting liquid from the well shaft into the prising a string of tubing at the' >lower end of
pump, means for conducting iiuid under pressure which a ñuid lift pump is attached, means at the
from a point above the level of the liquid in the upper end thereof to supply la pressure fluid
well to said pump, means for conducting liquid through the tubing to the >ñuid lift pump, a sec
as, from the pump to a point above the level of the ,ond string of tubing connected with said pump
liquid within which it is submerged, ñoat oper
ated means for bringing the air under pressure
into lifting relationship to a quantity of liquid
introduced into the pump and for interrupting
40 the flow of air under pressure when said quantity
of liquid has been forced into the liquid con
ducting means, an aspirator tube through which
the fluid under pressure flows from the pump as
the liquid is lifted, and means manually con
and through 'which fluid under pressure may-be
elevated from the wellA into the liquid in which
the pump is submerged, a main fluid chamber
adapted to communicate with the pressure ñuid 40
tubing and with the lifted liquid tubing, valve
means interposed in' the line of ñow of said fluid
to the main liquid chamber whereby the iioW of
pressure fluid may be_,interrupted, means for in
troducing liquid to the main'liquid chamber, 45
means for interrupting the flow of liquid into said
chamber, and a float Within the chamber simul
taneously and alternately acting to open the ñuid
lifted and means for exhausting pressure fluid pressure valve and to interrupt the flow of liquid
from the pump.
into the main liquid chamber whereby the pres
3. In a device 'of the character described, a Ísure fluid may be admitted to the main liquid
fluid lift >pump adapted to be positioned in a well chamber to elevate a quantity of liquid entrapped
shaft at a determined degree of submergence, therein and to cause it to be lifted through the
means for conducting liquid from the well shaft liquid lift tube, and alternately to exhaust the
into the pump, 'means for conducting fluid under pressure iiuid from the main liquid chamber and 55
55 pressure from a point above the level of the liq
simultaneously to open the «liquid control valve
uid in the well to said pump, means i’or'con-l to admit liquid from the Well into the main liquid
‘ducting liquid from the _pump to a point above chamber and `means for conducting the spent
the levelof the liquid Within`which it-is sub
pressure fluid from the pump and releasing it
merged, means actirig to prevent return flow of within the well at a level of lesser hydrostatic
said liquid into the pump, ñoat operated means
for bringing the air under pressure into lifting - pressure than that prevailing at the position of
relationship to a quantity of liquid introduced the pump.
6. A device of the 'character described, com
into the/pump and-for interrupting the ñow of prising
a string of tubing at the lower end of
air under pressure when said quantity of liquid which a fluid lift pump is attached, means at the - 65
end thereof -to supply a pressure fluid
an aspirator tube through which the fluid under. upper
through the tubing to the fluid liftÍ pump,-a sec
pressure flows from -the pump as the liquid is ond string of tubing connectedwith said pump
nftea and by which air’ is introduced into said and through which ñuid under pressure may be
column of fluid, manuallyl controlled means for elevatedfrom the Well into the fluid in which the
70 introducingfluid under pressure into said aspira
pump is submerged, a main fluid chamber adapt
45 trolled from above ground for introducing fluid
under pressure into said aspirator tube to in
creasethe buoyancy of the liquid which is being
!tor tuber` to vincrease the buoyancy of the liquid
which is being lifted, and means actuated from
ed to communicatewith vthe pressure fluid tubing ’
and with the lifted liquid tubing, valve means
" f above the ground for -regulating the proportion interposed in the line'of ñow of said Apressure
of fsaid fluid under pressure'withrelation to the
iölllweight of the liquid flowing-through the, aspira >fluid to the main liquid chamber whereby thedow
of pressure fluid may be interrupted, means forv operation of the pressure fluid valve by the float
introducing liquid to the main liquid chamber, will be delayed until a predetermined- amount of
means for interrupting 'the flow of liquid into ‘ energy will ‘be stored by the float'to positively
said chamber >and a float within the chamber si--` move the valve, and -a positively actuated foot l
multaneously and alternately acting to open the vvalve mechanism at the bottom of the liquid
iluid pressure valve and to interrupt the flow of chamber adapted to beactuated by the float in
liquid into themain liquid chamber whereby the ‘ alternate' movement with-relation to the pres
pressure fluid may be admitted to the main liquid sure fluid valve.
chamber to elevate a quantity of liquid entrapped
9. An air lift pump comprising a main cylinder,
therein and to cause -it to belifted through the a sleeve foot valve at the bottom o_f the cylinder
liquid lift tube, means permitting pressure fluid‘ for regulating the inflow of liquid tothe cylinder,~
to be exhausted from- the main liquid chamber as an eduction pipe by which vthe .liquid is con-_
displaced ‘by incoming _liquid and delay> action ducted from the cylinder, and a float within the
means resisting movement of the float at oppo
cylinder adapted to operate _the valve to permit
site ends of its cycle of operation thereby insur
liquid to enterthe' cylinder, means for conducting 15
ing that energy will be stored until a forcev has a pressure fluid into the` cylinder, a valve -for
' been accumulated sufficient to positively
p'letely move -the pressure ñuid valve.
_ '7. A device of the character described, com
.establishing and interrupting the flow of pressure
‘fluid to the cylinder, means permitting exhaust
of pressure fluid from said liquid vcylinder and an
prising a string of pressure fluid tubing adapted to operative connection between the valve and the
extend downwardly into a well, the upper end of vfloat whereby the- opening and closing of the 20'
said tubing communicating with a source of fluid pressure fluid valvewill be in synchronisrn with
under pressure, a fluid lift pump connected with the opening and closing of the sleeve foot valve.
the _lower endof' said tubing, a liquid eduction
10. In a iiuid lift pump a chamber into which
` pipe extending downwardly into the well to-com'
municate with said pump, a liquid chamber with
in the- pump and in constant communicationV
with said eduction pipe, «afoot valve interposed
vin the line of communication from the liquid
chamber to the eduction pipe whereby fluid ex
>liquidK flows, said chamber being submerged below
the level of `said liquid, means for delivering'fluid
under pressure to said chamber, aflow pipe com
municating with said .chamber and upwardly
through which said liquid may be` forced by said
' pressure fluid, said ñow pipe being formed at an 30,
pelled from the chamberinto the eduction pipe area of its length 'with a series of openings
will be entrapped in the pipe, a pressure fluid- through and along its sidewall, a pressure com
valve interposed between the pressure fluid tubing partment embracing the section of pipe through
I and the liquid chamber whereby the flovif of pres- Y `which the openings occur and into which ñuid
sure iiuid into the liquid chamber may be inter- _ under pressure is delivered, and a sleeve slidable 35'
rupted for a periodin the cycle ‘of operation of on said pipe and manipulated from a remote point
the pump, means for constantly introducing pres- - to vary the area oi’ said openings and the volume
' sure fluid into'the column of liquid above the foot
valve, afloat within the liquid chamber-connect'
of said pressure iìuid forced A_into the liquid flow
ed with the pressure fluid valve and operating at - ,11. A ñuid lift pump structure comprising a 40'
the ‘opposite ends of the stroke of said float to in
cylindrical pump unit adapted to be mounted at '
troduce said pressure fluid into the liquid _cham
the vlower end of' a string of pipe, said unitbeing '
ber whensaid chamber is filled and to interrupt formed with va pump chamber therein, a foot valve
the iiow lof pressure fluid into said chamber when at the bottom of said chamber to'permit liquid
the liquid has'been expelled therefrom and means yfrom the well to enter the chamber, a pressure 45
whereby the. operation of the pressure fluid valve valve at . the top of‘ said ‘ chamber to establish.
b_y the ñoat will be delayed until a predetermined- ' andinterrupt the iìow of a pressure ñuid into the
amount of energy will be stored by the float to -pump chamber, a fluid eduction -pipe extending>
positively move the valve to bring about said a‘. _upwardly through the pump chamber and cen
ternate operation and means permitting` pressure ~ trally of the‘string of pipe'by'which the pump 50
fluid to be exhausted from the main liquid cham .unit is supported; said fluid eduction pipe and the
ber .as displaced by incoming liquid.
' supporting pipe string being concentrically ar
8. A device of the character described, compris- _ ranged whereby the ñuid under pressure may pass
-ing a string of pressure fluid tubing adapted to
extendxdownw'ardly into a well, the upper end of
said tubing communicating .with the lsource.oi’
_fluid under pressure, a duid lift pump connected `
with the' lower end of said tubing, a liquid educ
tion pipe extending downwardly into the well
downwardly between the supporting string‘of pipe
and the liquid eduction pipe to the pump unit,
-a pressure fluid control valve establishing and
interrupting _the flow of pressure iiuid to the
pump chamber,- means for permitting exhaust of
'said pressure iiuid from the pump chamber, a
foot valveat the bottom of the pump chamber 60
to prevent the outflow of liquid from the bottom
tion with said eduction pipe.'a foot valve inter
of the pump unit, and afloat within the pump
posed in the _line of communication from the chamber adapted to open and close the pressure
‘liquid chamber tothe eduction pipev whereby fluid 'ñuid valve adjacent the opposite ends of its
expelled from the 'chamber into the eduction pipe movement, the eduction pipe being formed above es'
will be entrapped in the pipe, a pressure fluid the pump 'chamber with openings, means for in
valve- interposed between the pressure ñuid tub
troducing a iiuid under, pressure to the liquid in
ingland the liquid chamber whereby the> ñow of the eduction pipe 'through said openings, ‘and a '_
pressure fluid into the liquid chamber may be in-" tubular sleeve adjustable from above the well and
terrupted for a period in the cycle of .operation slidable _to vary the degree ofr eñective yarea of
to communicate with said pump, a liquid cham-v
ber within the pump and in _constant communica
'of the pump, means permitting exhaust of pres
sure _fluid from the liquid chamber, a float within
the liquidy chamber connectedl with the pressure
12.v An'air lift'p ofthe character disclosed' comprising' _a maní, liquid chamber, a vertically
fluid valve vand operating at the opposite ends of
the-stroke of said ?oat, and means whereby the
tube extending through the float and by' whichf
movable` float within s'aidchamber, an eduction '
said tube is vertically moved, a positively acting
foot valve at _the bottom of said’liquid chamber
and connected to the eduction tube whereby ver
tical movement of the tube will actuate said
valve, and adjustable means controlling the rela
tive movement of the float and the eduction tube
~ and whereby the column of liquid entering the
main liquid chamber at each cycle of operation
foot valve at the bottom of said liquid chamber
and connected to the eduction tube whereby ver
tical movement of the tube will actuate said valve,
adjustable means controlling the relative move
ment of the float and the eduction tube and
whereby the column of liquid entering the main
liquid chamber at each cycle of operation of the
positively operated foot valvev will be controlled,
and a spring acting to balance the weight of the
of the positively operated foot valve will be con
eduction tube and the parts attached thereto in
a manner to permit‘the tube and all of said parts
13. An air .lift pump of the character disclosed
be moved up and down with equal force under
comprising a main liquid chamber, a vertically to
the action of the movement of the float.
movable float within said chamber, an eduction
tube extending through the float and by whichEDGAR w.- PATTERSON. 15
said tube is vertically moved, a positively acting
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