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Патент USA US2405324

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Au. 16, w46.,
J. D. Nlxow
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2,4@5932
SYSTEM OF'AND‘APPARATUS FOR FLQWING WELLS
Filed Jan.
-12, 1945
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SYSTEM 0F AND APPÁRATUS FOR FLOWING WELLS
Filed Jan. 12, 1945'
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Aug, 6, 194.,
J. D. NlxoN
¿499324
' SYSTEM OF AND AP'PARATUS FOR FLOWING WELL'S.
Filed Jan. l2, 1945
'
4 Sheets-Sheet 5
77
I Jed'dy
Nikon
Aug. 6„ E946.
.,J. D. NHXON
SYSTEM oF AND APPARATUS FOR FLowING 'WELLS
Filed Jan. 12, 1945
613
60
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2,4@559324
4 sheets-snee@ 4v
Patented Aug. 6, 1946
2,405,324
UNITED STATES PATENT OFFICE,
2,405,324
SYSTEM OF AND APPARATUS FOR
FLOWING WELLS
Jeddy D. Nixon, New Braunfels, Tex. f
Application January 12, 1945, Serial No. 572,490
20 Claims. (Cl. 10S-240)
l
2
This invention relates to new and useful im
top of the well in a single and continuous oper
provements in systems of and apparatuses for
ation, and also in which method the supply of
flowing wells.
pressure fluid to displace the well fluid is con
_
.
One object of the invention is to provide an
trolled from two sources, one a secondary source
improved system for flowing wells of the slow
for intermittently causing small conserved sup
plies of pressure iluid to displace well lluid from
or low production type, which wells, due to the
consolidated nature of the producing formation
produce slowly or which due to the relatively
the receiving area into the collecting area and
the other, a primary source for causing a suf
ficient supply of pressure iluid to elevate and
cumulate a relatively short column of well fluid 10 discharge the collected well iluid from the col
lection area, all`V without channeling or undue
in the well and/or build up a column of fluid very
slowly; thus making ordinary producing meth
aeration, as well as without bleeding oil wasteful
small yield or low formation pressure either ac
ods expensive, wasteful and unsatisfactory.
quantities of pressure lluid.
Another object of the invention is to provide
tated with parañin, my improved method also 15 an improved system wherein the well fluid is
displaced by pressure iluid in stages from the
seeks to eliminate or reduce paraf?ning by re
accumulating area to the collecting area and
moving the cause.
then cascaded in the collection area, whereby
Another object of the invention is to provide
no hydrostatic load of well fluid is imposed upon
an improved system wherein small or relatively
small quantities of well fluid are periodically 20 the slug of well iluid when being displaced, other
Since such wells are prone to become incrus
displaced into a collection area by means of
than that inherent to said slug.
`
A further object of the invention is to pro
relatively small quantities of pressure ñuid and
vide an improved apparatus operating in accord
the accumulation thus collected is elevated and
ance with the system.
discharged from the well with a proportionate
A further object of the invention is to provide
amount of pressure fluid, whereby regular lift 25
an improved apparatus operating in accordance
ing stages may be maintained and pressure iluid
with the system wherein the well casing is uti
conserved, as well as channeling of the pressure
lized to form a collection chamber as Well as
fluid through the well lluid due to the relatively
one which lends itself to ready assembling and
short column usual in wells of the type described,
is prevented.
30 installation in a well.
A still further object of the invention is to
Still another object of the invention is to pro
vide an improved system whereby the building up `
of the usual short columns or long columns com
posed of slugs of well fluid, superimposed upon
each other, is prevented and the resultant back
pressure upon the formation is obviated or the
waste of pressure fluid is eliminated due to the
superimposing of successive slugs prior to final
provide an improved well fluid lifting apparatusKL
wherein a receiving chamber is located at the`
bottom of the well and a collection chamber is
also located at the bottom of the well adjacent
to the receiving chamber and connected thereto;
together with a tubing or conductor extending
from the collection chamber to the top of the
well and a pressure fluid inlet valve connected
ejection from the well.
A further object of the invention is to provide 40 with the receiving chamber and located in the
an improved system of flowing wells wherein they
lower end portion of the well, whereby pressure
fluid maybe economically supplied to the cham
well fluid is admitted from the producing for
mation into a receiving area in small or relative
bers.
Another object of the invention is to provide
ly small quantities and such quantities periodi
cally displaced into a larger collecting area, 45 animproved well fluid lifting apparatus wherein
a collection chamber in the lower end of the well
whereby it is not necessary to wait until a column
is located above and adjacent to a receiving
of well fluid of such length as to be economically
chamber and the well fluid discharge> tubing is
and efficiently lifted, is built up.
connected to the bottom of the collection cham
A still further object of the invention is to
provide an improved system of flowing wells 50 ber, whereby well fluid accumulated in the re
wherein the well fluid is periodically displaced in
ceiving chamber may be periodically displaced
small or relatively small quantities into a collec
therefrom, conducted to the upper end portion
tion area by pressure fluid and after a sizeable
'of the collection chamber and cascaded thereintol
with displacing the hydrostatic load of previously
accumulation of well fluid in the collection area
is obtained, such accumulation is displaced to the
`displaced accumulations.
2,405,324
3
4
Still another object of the invention is to pro
“tight” formation or the comparatively small
quantity of Well iiuid in the formation, said well
vide an apparatus of the character described
wherein the collection chamber is exterior of
the eduction conductor and is formed between
packers adjustably fastened in the casing, where
by the capacity of the chamber may be varied
by vertically adjusting one of the packers and
changing the lengths of the intermediate con
ductors, and also whereby the capacity of the
collection chamber is not by the length or diame
ter of the eduction conductor.
A construction designed to carry out the inven
tion will be hereinafter described- together wit
other features of the invention.
'
does not build up a sufficient column in the well,
to make ordinary lifting methods practical.
There are many wells which produce so slowly or
in such limited quantities that in practicing the
method, it becomes necessary to lift only approxi
mately one gallon of well íiuid (liquid) at each
operation, while in other wells several gallons
may be lifted at each operation. However, the
`quantities will always be relatively small. The
receiving chamber may be of such length as is
required to carry out the method.
The principle on which the apparatus oper
The invention will be more readily understood
from a reading of the following specification and
Y
ates being to periodically displace limited accu
mulations of well fluid into a collecting area, pres
by reference t0 the accompanying drawings,
sur@ fluid is supplied by the pipe I6 to the upper
wherein an example of the invention is shown
end of the chamber. In order that this pressure
and wherein:
ñuid may act on top of the well fluid standing in
Figs. 1, 2 and'3 are views partly in section and 20 the chamber, a discharge tubing I S extends down
partly in elevation and representing sequence, a
into the said chamber. An ordinary standing
well installation of an apparatus for carrying out
valve I9 is screwed into the lower end of said
the method,
tubing, a short distance above the standing valve
Fig. 4 is an elevation, illustrating in general, the
I4. The pressure fluid forces the well ñuid down
operating mechanism for the apparatus,
wardly in the chamber I0, whereby said ñuid un
Fig. 5 is an enlarged, horizontal cross-sectional
seats valve i9 and is elevated in the tubing.
View taken on the line 5-5 of Fig. 1,
When the liquid level in the chamber goes below
Figs. 6, '7 and 8 are enlarged, horizontal cross
the valve IS, the pressure fluid escapes into the
tubing.
sectional views taken on respective lines of Fig. 2,
Fig. 9 is a longitudinal, sectional view of' the
As is shown in Fig. 2, the upper end of the down
automatic shift valve,
pipe Iâ is screwed into the lower reduced collar 20
Figs. l0, 11 and 12 are views similar to Figs. 1,
of a lower iitting 2 I. This fitting is provided with
2 and 3 and illustrate another iorm of apparatus,
a substantially L-shaped passage 22 and the up
Fig. 13 is an elevation of a. time controlled ap
per end of the discharge tubing I8 is screwed into
the bottom of the fitting so as to discharge into
paratus such as may be used with the intermitters,~
and
the bottom of said passage. The tubing I8 is
Fig. 14 is a view of a modified form of receiving
disposed at one side of the collar 2Q and the flared
and collection chambers, partly in elevation and
mouth of a vertical duct 23 discharges into the
partly in section.
'
collar for supplying pressure fluid to the down
This application is ñled as a continuation-in 40 pipe IB. This duct23 is arcuate in cross-section
part of my co-pending application Serial No.
as is shown in Figs. 7 and 8. The upper end of
454,620, filed August 12, 1942.
In the drawings, the numeral Ill designates an
upright cylindrical receiving chamber or recep
tacle, which is located at the bottom of the well as is shown in Fig. 3. The chamber has a reduc
ing coupling II screwed into its lower end and a
depending nipple I2 is screwed into this coupling.
the duct opens into a cylindrical sump 24 in the
upper end of the ñtting, which sump is internally
screw-threaded to receive the lower end of a con
necting pipe 25. A counter-bored well 26 is pro
vided in the bottom of the sump and the lower
end of an eduction tubing 21 is screwed into the
upper end of said well; A port 23 leads from the
bore through the fitting (Figs. 2 and 7) and dis
A bull-plug strainer I3 is screwed onto the lower
end of the nipple. An ordinary standing valve 50 charges into the casing.
.
I4', of the ball type, is mounted in the upper end
An upper ñtting 29 shown in Figs. 1, 2, 5 and
of the nipple and extends upwardly in the cou
6, is formed with a bore 30 extending there
pling I’I.
through, somewhat larger in diameter than the
The receiving chamber Ill has a second reduc
eduction tubing 27 which extends axially through
ing coupling I5~screwed into its upper end; While 55 said bore. In an actual installation the eduction
a down-now pipe I6 has its lower end screwed into
tubing will not be bent as shown, since owing
thev upper end of said coupling. As is shown in
to the lengths of the parts, said tubing will pass
Fig., 3 the usual well casing C extends slightly be
through with only slight deflections. A vertical
low the upper end of the chamber I0. A suitable
discharge tubing 3i disposed at one side of the
packer I1 mounted in the casing, packs oil be
connecting pipe 25 has its lower end screwed into
tween the casing and the pipe, thereby shutting
the top of the lower fitting 2| in communication
off the producing formation which lies be1ow the
with the passage 22 and is provided in its upper
portion with an elongate discharge slot 32. In
casing. Well fluid which may be oil and/or gas
and sometimes including water, flows from the
order to anchor the upper end of said tubing,
producing formation and enters the perforations 65 a cap 33 is screwed thereonto. An anchor belt 34
ofthe strainer I3, from which it rises through the
is supported in a ñanged bushing 35 carried by
nipple I 2 into the receiving chamber I0.
a bracket 3S projecting laterally from the lower
One of the features of the invention is the step
end of the upper iitting 2S. This bolt has screw
in the method whereby a small or relatively small
threaded engagement in the cap 33.
quantity of wellñuid may beY displaced from the
receiving chamber I0, at each operation. The
' The upper ñtting 29 has an internally screw
threaded collar 31 at its upper end for receiving
the lower end of a hanger pipe 38. A suitable
invention is most applicable to wells where the
bottom-hole pressure is low and the well ñuid
packer 3d packs off between the casing and the
does not accumulate with suiiicient rapidity or
hanger pipe. ` It will be observed that the lower
rise high enough; or due to a consolidated or 75 packer I'I (Fig. 3) and the upper packer 39, pack
2,405,324.
5
off a space within the casing C exterior of the
elements i6, 2i, 25, 29, 3| and 3B which forms
a collecting chamber A, into which the slot 32
of the tubing 3|, discharges. The Well ñuid which
is elevated through the tubing I8 and passage 22
by the pressure fluid, is thus ejected into the col
lection chamber >A and this chamber is of such
size as to accumulate a sizeable quantity of well
fluid, as for instance a barrel. Adjustable pack
ers are common in the well art and the packers
Il and 39 may be vertically adjusted to vary the
capacity of the collection chamber as conditions
may require.
.
The eduction tubing 21 (Figs. 1 and 2) extends
upwardly through the bore 39 of the fitting 29 .
into and through the hanger pipe 38. Connected
in the tubing is a slip joint 40 comprising a sleeve
4I into the lower end of which the tubing is
screwed.
A bell 42 is formed on the upper end
6
durationto permit the requiredlnumber >of-rse'c»l
ondary-operations during such duration. As an
illustration, the primary intermitter P may be set
to operate every v7 hours; -while thel secondary
apparatus may be set to’operate vat intervals of
10 minutes, skipping an operation at the time'in
termittei-> P operates. Thus, the intermitter »Si>
would operate approximately 42 times to each op,
eration of the intermitter P. If the intermitterS displaced one gallon at each operation or stage,
approximately 42 gallons (liquid) of Iwell fluid
would have been collected in the chamber A, when:
the intermitter P operated. A barrel of -oil con
tains approximately 42 gallons (liquid).
.
y
I have shown the intermitter P connecting wit
a pressure fluid discharge pipe 50 and the inter
mitter S, as connected with a discharge pipe 5I;
The pipe 50 isv connected with one side of the
T-shaped casing 52 of an automatic shift valve
E and the pipe 5| is connected to the opposite of
I
of the sleeve and is provided with internal pack
ing rings 43 in which the upper length of the
said casing as is shown in Figs. 4 and 9. A pres.->-`
tubing has a sliding fit, whereby a fluid-tight
sure ñuid conducting pip'e 53 leads to the actu-»
joint is made. This slip joint 4 permits the
ating apparatus for. the valve B. in the well.
upper length of tubing to be vertically adjusted.
A coupling 54 is screwed onto one side of the`
The hanger pipe 38 is, connected to the lower 25 casing and the pipe 5U is screwed into .this cou-v
end of an operating valve B. As this valve may
pling. An annular beveled valve seat 55 formed
be of any suitable type, it is not considered neces
in the couplingat'one end of the casing. , A like
sary to illustrate or describe the same in detail.
coupling 56 is screwed onto the opposite side of
A valve and control apparatus such as are shown
the casing andthe pipe l5l isscrewed thereinto.
in my Patents 2,245,003, 2,202,462, and 2,245,005.
A slide valve 5l has a sliding fit in thecasing 52
may be used. The valve B has pressure fluid inlet
and is provided with a reduced shank 58k inter-f
ports 44 and suitable valve means for controlling
mediate its ends. On each end of the valve a bev~V
the supply of such fluid to the hanger pipe 39;
eled annular valve disk 59 is suitably secured.
while a Well tubing 45 leads from the valve for
The disks may be made of anyr suitable material,A
conducting Well fluid from the eduction tubing.
such as synthetic rubber or packing material. '
The principle of operation involved in the in
In operation, one or the other of said disks is
vention is that of periodically lifting relatively
always in engagement with an adjacentl valve.
small quantities of well fluid from the receiving
seat 55, thus alternately closing ofi`> the pipes 50.k
chamber l0 to the collecting chamber A, by means
and 5 I. The valve 45l is of such length that when
of pressure :fluid and lwhen a sufiicient quantity 40 one of the disks 59 is seated, the opposite end
of well fluid has been accumulated in the collecof the valve is in the medial portion of the casing
tion chamber, to elevate and discharge such ac
52, thus `permitting free flow of fluid from'the
cumulation. Obviously, the quantity of pressure
open seat to the pipe 53. The valve is alternately
iluid required to lift a small or relatively small
shifted from one seat to the other seat by the
quantity of well fluid from the receiving chamber . , pressure fluid acting on the seated end ofv said
I0 to the collection chamber A, a distance usually
less than 25 feet, is not nearly as large as the
The pipe 53 leads to an actuator which in
quantity of pressure fluid necessary to lift the
cludes a cylinder 6i as is shown in Fig. 4 whichA
many times larger quantity of Well ñuid from the
contains a piston as shown in my Patent No.'V
collection chamber to the top of the well, a dis
2,202,462. This cylinder is suitably supported
tance varying from several hundred to several
and has a piston 62 fastened to the upper end
thousand feet. As it also is desirable to maintain
of a wireline 63 which line extends down through
the casing C above the packer 39 full of pressure
the Well head 64 and is connected with the
fluid and under sufficient lifting pressure, it be
valve B.
valve.
»
'
'
comes manifest that it is also desirable to con
In operating the apparatus, it is ñrst installed
in the well.r The apparatus is hung from the
pipe 45 which in turn may be suitably suspended
from the well head 64. As the well casing is
source and a secondary source connected in com
shut in at the surface in accordance with the
mon with the mechanism for actuating the valve 60 usual practice, the casing space above the packer
B, and including an automatic valve for shifting
39 forms, a reservoir R which is ñlled with pres
the supply from one source to the other source.
sure ñuid, such as gas, by means of the pipe 60.
Here again the particular mechanisms for Supply
This gas is constantly supplied under a suñîcient
ing the pressure fluid may be of any suitable
pressure to :build up a working pressure in the
type. As the primary source, an apparatus P,
reservoir, usually from 250 to 600 lbs. per square
such as it shown in my Patent No. 2,202,462, may
inch. Such a working pressure is substantially
be used and for the secondary source an appara
serve such pressure iiuid, which is usually gas.
In order to supply the pressure fluid in accord
ance with the invention, I provide a primary
tus of the type shown in my Patent No. 2,171,478,
may be employed.
maintained throughout the operation.
The entire apparatus including the valve B is
located Yat the bottom or lower end of the well.
. Both of these apparatuses are time controlled 70 In many installations the valve B may be less than
and thus the secondary apparatus or intermitter
100 feet above the base of the well in a well which
S may be set to supply pressure fluid for brief
may be several hundred or more than a thou
periods at predetermined intervals, while the pri
sand feet in depth. As set forth in my Patent
mary apparatus or intermitter P may be set to
No. 2,171,478, the valve B is operated by the Wire
operate at the end of an `overall period of proper 75 line 63 which is attached to .the'piston 62 of the
2,405,324'
8
7
fluid possessing insufficient energy to unseat the
valve I9, will be trapped between said valve I9
and valve B and not lost.
shutolîv the supply ofl pressure iluid from the>
In order to release pressure fluid trapped in the
reservoir R through the inlets vlill.
The secondary intermitter S is of the type Ul upper portion of the collection chamber A, a.
relief valve 65 is provided in the ñtting 29 above
which is designed to operate rapidly so pressure
the bolt 34 (Fig. 2). lI‘his valve is of the ball
ñuid may be supplied to the cylinder 6| for a
type and is provided at the lower end of an up
brief lperiod of time and quickly shut oiî. Usu
right passage 66 connected intermediate its ends
ally thevintermitter S will open the valve B from
1 to several seconds, as very little pressure fluid, 10 with the bore 39 of said fitting. Whenever the
pressure of the gas trapped in the collection cham-V
at the Working pressure herein speciñed, will be
ber becomes suñicient, it will unseat the valve 63
required to lift the small quantity of ‘ Well iluid
and flow into the bore 30, when the valve B is
from the chamber l0 to the chamber A. It will
closed.
be assumed that the well has been emptied of
As a conservation measure, the secondary in
collected well iiuid and the shift valve 51 is 15
termitter is timed to shut off when the accumula
seated at the left hand side ofl the casing 52. of
tion oi well iluid is discharged through the slot`32
the automatic valve E, thus shutting oiî new
oi' pipe 3l; thus gas is supplied only in sufficient
through the pipe 5I; also thatwell fluid has ñlled
quantity to displace the accumulation of Well
the receiving chamber l0 to the point Where the
fluid and in this case is not lost or vented to the
desired and predetermined quantity has accu
atmosphere.
mulated by ñowing thereinto through the strain
As an illustration and in no sense, a limitation,
er I3 and past. the standing valve i4. The tim
if it is desired to collect a barrel of well iiuid which
ing mechanism in the intermitter S at this time
may be oil, the chamber i9 may be arranged to
operates said intermitter> to release the pressure
accumulate above the valve I9, one gallon of oil.
fluid which flows through the pipe 5|, unseats
Thus in 42 successive intermittent operations.
theyalve 51 and causes it to engage the oppo
approximately a barrel of oil may be Collected in
sitevalve seat 55Y and close off the pipe 50, where
the chamber A. The quantities may of course be
by said pressure ñuid may iiow into the pipev 53.
less or greater. The collection period will vary in
The pressure uuid.. from the pipe 53 enters the
actuator cylinder 6l and raises the wire line 30 accordance with production of the Well. Some
wells may be more productive than others and
whereby the valve B (Fig. 1) is opened to admit
thus the quantity of well iluid accumulated in
pressure fluid through the inlets »44 from the res
chamber l0 and collected in chamber A, may vary,
ervoir R. >‘This pressure ñuid flows down the
as well as the timing of the operations.
hanger pipe 38. to the bore 30> of ñtting 29, (Figs.
The primary intermitter P is of a type designed
1 and 2) thence by >pipe 25 `to the well 24 and 35
to supply a larger quantity of gas at each opera
by way of duct 23 and pipe I-B to the top of the
tion than is the secondary intermitter S. It is
receiving chamber l0. Usually the Well fluid will
timed to operate when the predetermined quan
rise in the chamber l0 to a point; adjacent the
tity of oil has been collected in the chamber A.
coupling l5. (Fig. 3) and thus, the pressure fluid
In Figs. l0, 1l and 12, I have shown another
will> be delivered. on top of the accumulation. of 40
form of the invention and also have further illus
well iiuid. When this occurs, the valve E4. will
trated the installation. The casing C is provided
be closed. thereby keeping the pressure off of the
with a Well head fill' on which is mounted a cross
formation. The pressure. fluid acting upon the
T 10, from which the usual iiow line 1l extends.
well ñuidwill. force it downwardly in the cham
ber l0, unseating the valve I9 and displacing such 45 A stuihng box 12 is mounted on the T and wire
line 63 extends through this boX. The T 1.0 is
iluid upwardly into the discharge tubing» lB,
fastened to the upper end of the tubing 45 which
through said tubing (Fig. 2), thence through the
extends down to the Valve B as is shown in Figs.
passage 22 into the tubing 3l and thence through
10 and .11. In Fig. 1l, the wire line G3 is shown
the slot 32 to the collection chamber A.
cylinder 6| for raising and lowering the wire line
and thereby operating said valveto admit and>
. Itis here pointed out that the slot 32 islocated 50 attached to the upper end of a weight bar 13.
in the upper> portion of the tubing 3l andalso
that the packer L1 is located some distance below
said Slot, thereby giving to` the. collection Cham.
ber a large capacity below said slot.
An im,
portant feature of the> invention, is that the well
fluid which discharges threughthe slot4 cascadesv
or falls down into the collection chamber there
below.- Owing tothe cascadingV of the oil, in the
collection chamber, no hydrostatic load from pre
ceding displaced accumulationsv is imposed upon
each succeeding displaced accumulationV dis.-r
charged into the collection chamber A
This weight bar when lowered engages a plunger
'it and depresses- the same to close the valve B
as is clearly shown in my Patent No. 2,245,004.
As before stated, it is not considered necessary
to describe the valve B in detail because any valve
suitable for the purpose may be used. While in
the form shown in Figs. 10 and 1l, the weight bar
is lowered to close the valve and raised to open
the valve, as in my Patent No. 2,202,462, the oper
ation may be reversed as in my Patent Re. 21,199.
Suitable kick-oil valves 15 may be connected in
the tubing 45 above the valve B as is common in
this art; such valves are shown in my Patents
: When theliquid level of thewell fluid in cham
2,171,480 and 2,245,002.
ber I0 is forced below the valve i9', no additional
The Valve B is connected with a suitable gas
Well ñuid will be displaced into the tubing l 8 and.
release valve 16 such as is shown in my Patent
when the displaced well iìuid has‘been. discharged
No. 2,245,008, Fig. 13, by means of a nipple orv
through the slot 32,> the. supply oi pressure fluid
short length of pipe 11. A suitable packer 18 is
will be shut ott. Due to the larger diameter of
mounted on the nipple so as to pack oiî the casing
the collection chamber A and the considerable
space. therein above the slot 32,. the residue of 70 C thereabove and form the-pressure fluid reser
voir R in the same manner as the packer 39 in
pressure ñuid. flowing from the slot 32:, will be'
Fig. 1. The purpose of valve 1G is to release any
dissipated inthe upper portion of.' said collection
gasv or'pressure ñuid from the casing below the
chamber. Whenthe velocity of thepressure iiuid`
iiowing through the. valve1l9 recedes, said valve.
will close. `Whenthe valve B. closes, any pressure.
packer to the nipple 11. The upper reducedend.
of an elongate. receiving chamber 19 is> screwedy
2,405,324;
-9
10
into the lowerl end of the valve 16. This chamber,
ried into the collection chamber A and with the.
as shown in Figs. 11 and 12, is cylindrical in cross
following pressure fluid, forces the collected well
section and is given suilicient length to accumulate
fluid which will always stand well above the port
the desired quantity of well fluid.
28, into the tubing 21, so that when the pressure
» A rdischarge tubing 80 ' extends upwardly 5 ñuid enters said tubing the column of well fluid
through the valve 16, nipple 11 to the valve B.
will be in motion and the pressure fluid will not
The lower portion of this tubing is swaged or
channel therethrough. _It is obvious that in the
otherwise enlarged to form a cylindrical receiving
forms shown in Figs. 10 to l2 and 14, the accumu
chamber 19 which is disposed co-aXially in a col
lation will be displaced into the ytail pipe 83 and
lection chamber 8| which is co-axially disposed in 10 start the collected well fluid moving upwardly,
the casing C, The receiving chamber 19 is spaced
before the pressure iluid enters the collection
area.
'
from the casing and the collecting chamber is
spaced from the receiving chamber so as to pro- "
This invention Seeks to conserve the pressure
vide the necessary areas therebetween. A stand- y
fluid which is usually gas, by locating the valve
ing valve 33 is screwed into the lower reduced end
of the chamber 8| and has a tail pipe 84 depend
ing therefrom as is shown in Fig. l2, The tail
pipe terminates above a standing valve 85 screwed
into the lower reduced end of the receiving cham
ber 19 and supports a nipple 86 towhicha bull 20
B at a point adjacent the receiving and collection
areas, as compared with a valveat the top of the
well. By this arrangement it is not necessary
to fill a long pipe with gas and waste this gas
in orderto rlift a small accumulation, or a large
collection of well fluid. It will be noted that the
slot 32 is near the top of the discharge tubing 3|
so that the collection chamber AV therebelow is
ample to store the desired quantity of Well fluid, ,
such as oil; also thatby dumping or cascading
each batch or accumulation into the chamber A,
plug-strainer 81 is attached.
,
,
The spacing between the collecting chamber 8|
and the receiving chamber 18 may be very narrow
because the bulk of the well fluid accumulated in
the chamber 19 will be below the enlarged portion
of the chamber 8|. This arrangement permits a
no -hydrostatic load must be displaced therein.Y
maximum diameter to be given to the _collecting
By using the casing C and the packers |1 and 38
chamber so that its storage capacity will be ade
to form-the collecting chamber, not only is such
quate. Where the accumulation of well iluid in
chamber economically formed, but it may be
the receiving chamber is small, said fluid may 30 lengthened or shortened at will because adjust
able packers may be used.
y
'
submerge only a portion of the tail pipe 84.
The formation of parañîn is prevented because
Any suitable time controlled intermitter may
be employed for supplying pressure iluid from
by accumulating and collecting the oil at the bot
tom of the well, the temperatures will usually be
the reservoir` R to the valve B; such time con
trolled mechanisms are clearly shown in my pat
high enough to keep the paraffin in solution; and
ents herein enumerated. It is possible to use a
when the oil is elevated to the top of the well,
single intermitter of the type shown in my Patent
it will be in suñlcient volume and so rapid, as to
obviate a pressure drop suflicient to parailln the
No, 2,245,005, and to provide reduced additional
tubing. The apparatus .beingv formed largely of
notches 8B on the Wheel || l of such patent be
tubular members lends itself to ready assembly
tween the notches ||2 thereof, to provide for
and installation in the well under ordinary oil
short or limited operations for displacing the well
ñeld practices. The fluid which is supplied to
fluid from the receiving chamber 19 into the col
lection chamber 8| and to employ the larger
elevate or lift the well fluid may be referred to as
“pressure fluid,” “lifting fluid” or “gas”
’ Y '
notches ||2 of said patent Vfor lifting the col
What I claim and desire to secure by Letters
lected load from the well, as is shown in Fig. 13. 45
The well fluid enters the receiving chamber 19
Patent is:
.
1. A system of flowing wellsy having casing vand
in the same manner as it enters the chamber I0
tubing therein which includes, means for packing
in Fig. 3. |At suitable intervals determined by
the spacing of the notches 88, relatively small
off the casing and maintaining therein a reser
amounts of pressure fluid are dischargedby the 50 voir of pressure fluid under working pressure,
means for accumulating a relatively small quan
valve B on top of the fluid in the chamber 19,
whereby the accumulated well fluid is discharged
tity of well iluid at the bottom of the well in "a
through the tail pipe 84 past the valve 83 into
confined area, means for periodically admitting a
proportionate quantity of pressure fluid from said
the collection chamber 8|. This operation is re
peated until the predetermined amount of well 55 reservoir to the accumulating means to displace
each accumulation of well fluid, whereby the well
iluid has been collected in the chamber 8|, where
fluid is displaced in a series of stages, means for
upon, the collection of well fluid is elevated in the
collecting the displaced well fluid in a single body
tubingupon the roller I lll of the lever |85 enters
the larger notch | I2.
in a confined area at the bottom of the well
through a period of several stages of displace
It is pointed out that the pipe 11 and tubing 80
may be of any desired length. In Fig. 14, I have 60 ment until a quantity of well fluid has been col»
lected, and means for admitting pressure fluid
shown another form of apparatus wherein the
from the reservoir to the collecting area in suf
pipe 11 and tubing 8|) are both lengthened and the
ficient quantity to displace the body of collected
enlarged portion of said tubing is eliminated,
thus making the tubing 8i) serve as the collecting 65 well iluid-into the well tubing and elevate it tothe
chamber.
top of said tubing and discharge it therefrom
It is also pointed out that during the interval
o'ftime elapsing between the last displacement of
during a continuous operation.
'
2. A system of flowing wells having tubing
well fluid from the receiving chamber I8 or 18
therein which includes, means for maintaining a
into the collecting chamber A, 8| or 88, well iluid 70 reservoir of pressure fluid under working pres»
will accumulate in the receiving chamber, there
sure in the well exteriorly of the tubing, means
fore when pressure is supplied to lift the collected
for accumulating a body of well fluid at the bot
well fluid, it will first displace the accumulation
tom of the well, means for admitting pressure
from the receiving chamber. In the form shown
fluid from said reservoir at predetermined'in
in Figs. 1 to l9, the displaced accumulation is car 75 tervals to said body of accumulated well fluid to
2,405,324
n
12
displace it instages, means for collecting the well
iiuid displaced' through a seriesïof stages in_to a
supplying small quantities of lifting'iiuid and dis-placing and cascading each accumulation of well
body‘at the 'bottom of the Well, and'meansA for ’
admitting pressure fluid from the reservoir'to the
fluid into a collection area in said Well until a
it from the collection arear to the tubing and ele
through a Vseries of stages into a body'of> pre
quantity of Well iiuid has been collected, means
for collecting and trapping the pressure fluid ex
bodyof collected Well fluid >for a period of _time
pended in lifting each accumulation, and means
and in sufficient quantity to continuously dis
for supplying sufficientlifting fluid to the'colle'c
place the collected body of well fluid Vupwardly
tion area to displace the collected well uuid from
through the tubing and discharge it therefrom.
the Well.
3. A system of flowing wells having tubing
9. A system of flowing wells wherein a body of
therein which includes, means for accumulating 10
lifting fluid is stored in the casing under oil-lift
Welliiuid at the bottom of the well, means for
ing pressure and an eduction tubing is'disposedin
periodically supplying pressure liuid to the accu
the casing which includes', means for accumulat
mulation of Well fluid to displace it and cascade
.ing a body of oil inthe well, means for supplying
it »into a collection area eXteriorly of the tubing
the lifting 'iiuid at ~predetermined intervals to
at the lower end of the Well until a body of well
said body of accumulated oil to displace it in
fluid is collected, and means for supplying pres
stages, means for collecting the oil displaced
sure fluid to the collected well iiuid to displace
determined volume at the bottom of the` well,
vate itin said tubing tothe top'ofïthe well.
4. A >systenui of iiowingevvells*having> tubing 20 and means for supplying the lifting iiuid to the
therein > whichA includes, means for -accumulating a
collected body of oil for a period of >time and in
`small quantity of well fluid in a confined area
quantity suiiicient to continuously lift the -col
«- at >the bottom of the well, means for periodically
lected body of oil'through the »tubing of the Well
supplying small quantities of lifting fluid and dis
placing and cascading each accumulation of well
and' discharge it therefrom,
iiuid into a collection area in said well until a
lifting iiuidis 'stored 'inthe casing under oil-lift
ing'pressui'e'andan eduction tubing is disposed
quantity of Well fluid has been collected, means
rfor conserving therlifting fluid in the well, and
means for supplying suiiîcient lifting fluid to the
collection area to displace the collected Well fluid
from the well.
Y ,
"
5. A system of flowing wells having tubing
e
1G. A system of flowing wells wherein a body of
in the casing which includes, means for accumu
lating oil from the formation in a confined area
at intervals of time, means for periodically sup
plying' the lifting fluid to the accumulated oil to
displace it into a collecting area,l means for col
lecting the displaced oil in such area during such
periods until a body of oil is collected equal to at
successively accumulating quantities of well duid
least one barrel at the bottom of the well, and
in a confined area at the bottom of a well in small
means for supplying the lifting fluid to the col
lected body of oil to continuously lift it through
individual batches, means for supplying pressure
the tubing of the Well and discharge it therefrom.
fluid to each successive batch of Well fluid from
a, point adjacent said area to displace each batch
11. A system of flowing Wells wherein a body
Y into a collection area, >means for supplying pres 40 of lifting fluid is stored in the casing under oil
sure fluid `from a' point adjacent said collection
liftingipressure and an eduction tubing is disposed
in the casing which includes, a receiving chamber
area to lift the .collected batches en masse to the
top of the Well, and means forcontrolling the
having a standing valve located below the liquid
supplies of pressure fluid from the top of the
level 4in'the well for admitting and trapping oil
well.
45 therein, an oil collecting chamber connected with
6. A` system of flowing Wells having tubing
the tubing and also connected with the 'receiving
therein which includes, means for successively
chamber for -receiving fluid therefrom, the col
accumulating quantities of well fluid in a con
lecting chamber havinga capacity for storing the
fined area at the bottom of a well in small indi
quantity of oil to be ejected from the well during
vidual batches, means for supplying pressure 50 a single lifting operation, vmeans for retaining
fluid .to each successive batch of well fluid from
oil in the collecting-chamber adapted to open in
a point adjacent> said area to elevate it in the
response to fluid pressure, means for supplying
Well, means for cascading each elevated batch into
iiuid pressure from the well casing tothe receiv
a confined collection area, means-for supplying
ing chamber to ~displace oil therefrom into the
fluid from a point adjacent said collection area
55 collecting chamber. surface-controlled means for
`to lift the collected batches en masse to the top
actuating the ñuid pressure supply means. and
of the well, and means for controlling the sup
time-controlled means for operating the surface
plies of pressure iiuid from the top of the well.
controlled apparatus having means for causing
therein which' includes, means for confining a
supply of pressure ñuid in the well, means for
7. A system of flowing Wells having tubing
the operation of Athe surface-controlled means
therein which includes, means for successively ac
andthe fluid pressure supply means to periodical
cumulating quantities of well fluid in a confined 60 ly supply pressure liuid to the receiving chamber
area at the bottom of a well in small individual
to displace oil'therefrom into the collecting cham
batches, means for supplying pressure fluid to
ber without displacing said oil from the collecting
each successive batch of Well fluid from a point
chamber and to periodically supply pressure fluid
adjacent said area to elevate it in the well, means
to the collecting chamber in suiiicient 4quantity
for cascading each elevated batch into a confined
to-discharge the collected oil from the collecting
collection area, means for supplying duid from a
chamber intorthe tubing and ejectxsaid oil from
point adjacent said collection area to lift the col
the tubing at the surface of the Well.
»
lected batches en masse to the top of the Well,
l2. A system of flowing wells having casin
and means for automatically controlling the sup
and tubing therein which includes, means in the
> 'plies of pressure fluid from the top of the well.
casing providing a reservoir of pressure fluid, a
8. A system of flowing Wells having tubing
receiving chamber disposed in the lWell below the
liquid >level therein, means in the Well adjacent
therein which includes, means for accumulating
the receiving chamber for supplying pressure-fluid
a small quantity of well fluid in a confined area
from said reservoir to the receiving chamber to
at the bottom of the well, means for periodically
13
2,405,324
displace oil therefrom, a collecting chamber at
the bottom of the well connected with the tubing
and communicating with the receiving chamber
for receiving well and pressure fluid therefrom,
and surface operating apparatus having means
including a time-controlled device for periodi
cally operating the lifting fluid supply means to
14
tion chamber exterior of the eduction tubing and
conductor, a discharge conductor leading from
Ithe receiving chamber to the collection chamber
for conducting fluid, and a fluid discharge tubing
between the collection chamber and the valve.
17. A well fluid lifting apparatus including, an
eduction tubing, a collection chamber connected
supply lifting fluid to the receiving chamber to
with the eduction tubing, a receiving chamber
displace oil therefrom into the collecting cham
connected with the collection chamber and
ber and to subsequently supply lifting fluid to the 10 adapted to be mounted at the bottom of a well.
collecting chamber to displace oil therefrom into
said receiving chamber having a Well fluid inlet,
the tubing and eject such oil from the tubing.
means for supplying pressure fluid to the receiv
13. A system as set forth in claim 12 wherein
ing chamber to displace well fluid therefrom into
the time-controlled device includes a movable
the collection chamber, a valve adapted to be lo
member having elements spaced to cause opera
cated in a well connected to the eduction tubing
tion of the fluid pressure supply means at prede
and to the means forsupplying pressure fluid,
termined intervals of time and each for a pre
surface means for operating said valve, second
determined duration of time and at least Aone ele
ary means for actuating the surface means for
ment to cause said operation subsequent to the
brief successive periods to operate the valve to
other elements and for longer duration of time. 20 periodically supply small quantities of pressure
14. A well fluid lifting apparatus for wells hav
fluid to the receiving chamber, land primary
ing tubing therein including, a vertically elon
means for actuating the surface means to oper
gated receiving chamber adapted to be located in
ate the valve to supiply pressure fluid to the re
a well below the liquid level therein for receiving
ceiving and collection chambers to displace col
oil from the well, a vertically elongated collect 25 lected well fluid through the eduction tubing to
ing chamber connected with the tubing having an
the top of a well.
inlet at its lower end extending into the receiving
18. A system of flowing wells having tubing
chamber, a valve for admitting fluid to the col
therein including, means for packing off the well
lecting chamber and retaining liquid therein, a
and maintaining therein a reservoir of pressure
pressure fluid inlet valve mounted in the well 30 fluid, a well fluid accumulating chamber having
tubing and connected with the receiving chamber
an inlet below the liquid level in the Well, a col
for supplying lifting fluid to the receiving cham
lecting chamber in the well connected with the
ber to displace oil therefrom to the collecting
accumulating chamber and the well tubing,
chamber, whereby said lifting fluid is supplied
means for admitting pressure fluid from the res
also to the collecting chamber when a predeter 35 ervoir in the well to displace accumulations of
mined quantity of oil has been displaced from the
well fluid from the accumulating chamber to
receiving chamber, surface-controlled means for
the collection chamber prior to discharging such
opening the pressure-fluid admitting valve, and
accumulations into the well tubing, and means
.apparatus on the surface for periodically operat
for admitting pressure fluid from the reservoir
ing said surface-controlled means having means 40 to the collection chamber for discharging the ac
for causing a series of operations of predeter
cumulated Well fluid therefrom into the well tub
mined periods of time and a subsequent operation n
ing and to the top of the well.
for a longer period of time, whereby oil is ac
19. A system of flowing wells having tubing
cumulated in the collecting chamber in a series
therein, means for packing off the well and main
of displacements from the receiving chamber 45 taining therein a reservoir of pressure fluid, a
and the collected oil raised from the collecting
well fluid accumulating chamber having an inlet
chamber by the lifting fluid.
below the liquid level in the well, means for
15. A system of flowing wells having tubing
packing oir the well casing to provide a collect
therein which includes, a receiving chamber dis
ing chamber in the well connected with the ac
posed in the Well having an inlet below the liquid 50 cumulating chamber and the well tubing, means
level therein, means mounted in the well tubing
for admitting pressure fluid from the reservoir
for supplying lifting fluid to the receiving charn
in the well to displace accumulations of well fluid
ber to displace oil therefrom, a collecting cham
from the accumulating chamber to the collec
ber wholly at the bottom of the well adapted to
tion chamber prior to discharging such accumu
be connected with the well tubing and connected 55 lations into the well tubing, and means for ad
with the receiving chamber1 to receive fluid dis
mitting pressure fluid from the reservoir to the
placed therefrom and having means for retain
collection chamber for discharging the accumu
ing oil therein, means for operating the lifting
lated Well fluid therefrom into the well tubing
fluid supply means to displace oil from the re
and to the top of the Well.
ceiving chamber into the collecting chamber in 60
20. A well fluid lifting apparatus including, an
a series of stages until a load of oil has been
elongate tubular accumulating chamber, a pres
collected in the collecting chamber, and means
sure fluid conductor connected with said »accu
for supplying lifting fluid to the collecting cham
mulating chamber, a Well fluid conductor ex
ber to raise in the well tubing the load of col
tending upwardly from the accumulating cham
lected oil and to discharge it from the well.
ber and having a discharge opening, packers en
16. A well fluid lifting apparatus including, an
gaging with the pressure fluid conductor above
eduction tubing, a pressure inlet valve connected
and below the discharge of the well fluid con
to said tubing, a receiving chamber adapted to be
ductor, well fluid eduction tubing having an inlet
mounted at the bottom of a Well, a conductor
between said packers, and means for supplying
connecting the receiving chamber with the valve
pressure fluid to the pressure fluid conductor.
for supplying pressure fluid to the receiving
chamber to displace fluid therefrom, a collec
JEDDY D. NIXON.
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