Патент USA US2405324код для вставки
Au. 16, w46., J. D. Nlxow _ 2,4@5932 SYSTEM OF'AND‘APPARATUS FOR FLQWING WELLS Filed Jan. -12, 1945 , 4 SheQtsL-Sheet l W Jeafd'y Númfz I ¿Imam/bof@ 'Àwä 9 w45» J. D. NlxoN v SYSTEM 0F AND APPÁRATUS FOR FLOWING WELLS Filed Jan. 12, 1945' E . 245,24 * 4 sheets-sheet 2 m , o v I, „ 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 /lr,.fÁ/4 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.