US1284641A - Pump. - Google Patents

Description

y) nections, etc.

UNITED STAT] I PATENT OFFICE.

VINCENT H. FRANCIS, 0F DBUMBIGHT, OKLAHOMA, ASSIGNOB. TO yEBICK-Ellllllf) SUPPLY COMPANY, OF PITTSBURGH, PENNSYLVANIA, A (3'OPOIILA'lION4 OF PENNSYLVANIA.

PUMP.

To all whom it may concern.'

Be it known that I, VINCENT H. FRANCIS, a citizen of the UnitedStates, and resident of Drumri ht, in the countyof Creek and State of klahoma, have invented a new and useful Improvement in Pumps; and I do hereby declare the following to be a. full,

clear, and exact description thereof.

My invention relates to pum s for oil orY like wells, and is devised particu a'rly thou h not exclusively as a pump for deep oil we ls adapted to be operated by awire rope or pump rods.

Heretofore the operation of pumping deep wells in which rods or wire rope is employed for reciprocntion of the pump-piston, the volume of flow, or the capacity of the pump is limited to the rapidity with which the pump-piston can be reci rocated by the wire rope or rods. Diiiicu ties obtain by reason of the flexibility of the pumpin connection between the pump beam an the ump-piston, permitting the pump-piston to e retarded on the down-stro e by compression of the fluid in the pump chamber, between the bottom or standin valve and the working valve or piston. he opening in the check-valve of the piston being only a small opening as compared with t e piston area, ermits the valve to settle down only as Huid is displaced through this opening. The slow settling of the valve on the downstroke, causes slack in `the pumping rods or wire rope and irregularity of the pumpingstroke of the piston, with resultant lessened capacity per pumping minute. Also, by reason of slack in the rods or wire rope the pump connections are subjected to severe strains when the pumping-beam takes up the slack, often resulting in breakage of the con- Water and gas pressure in the workingbarrel also act in a like mannerfto retard the downward movement of the piston, and be-4 sides, the gas creates a pressure on the inlet,

or standin valve which restricts or totally obstructs ow of fluid through this valve.

The primary object of my invention is to provide a pump adapted to be operated by rods or wire rope which is so constructed as to permit full length strokes in regular or substantially regplar time intervals in each direction, and w ich may be operated vat any desired degree of rapidity` an thereby provide for greater capacity per pumping hour.

pecicatlon of Letters Patent. l

Patented Nov. 12, 1918.

1917. serial no. 176,555.

A further Objectis to provide means which revent obstructive gas pressure in the workinchamber of the pump.

he invention consists in the novel construction, as hereinafter 'described and claimed. y

Figure 1 of the' drawing is a longitudinal sectional view of my invention; and Fig.'2

-is an enlarged longitudinal section of one of the valves employed.`

The numeral 2 indicates a portion of the well-tnbin to which my improved pump is attached, t ie location oythe pum with ref.- erence to its position in the welfbeing the same as with the standard arrangement for pumping. The pump comprises the workihg-fbarrel -3 which maybe the standard working-barrel of a re -lar oil-well pump, with anchor-tubing an strainer 4, lower or sta-ndin -valve 5, and traveling valve or iston 6. he traveling valve is connecte to the pumping-cable (not shown) 'by' the valve-rod 7 The type of checkalves within the barrel may e ofvanyl f the wellknown types of check-valves used in umps now employed in work of this genera `char.

' acter. lprefer, however, to employ a double check-va ve for the standing valve, so as to lessen the liability of leakage in the pumpchamber due to the sand in the valve. It has been found that with a double-seated valve the lower seat of the valve is exposed less to the action of the' sand'than the upper seat, and for this reason there is an advantage in the employment of a double valve.

Also this valvemis made with an elongated stem 5f, the purpose of which will hereinafter appearuf.

All of the above structure so far described functions in a manner precisely the same as with the standard pu'm as now employed. The working-barrel in t e resent invention is provided with means for ly-,passing a por- `tion of the iiuid from the pump-chamber to a point above the up ermost position of thesloo standing valveofV the pump chamber and 110 yinstance com- 10b the stem 5" of the valve pro'ects upward far enough to prevent closure of this port by the pump piston in case of slippa e or stretching of the pump cable. The y-pass 11 is provided with a check valve, and preferably two of such check-valves 12 are employed, the double arrangement being for the same purpose as the double-valve of the pumpbarrel, and these valves also seat downwardly. The structural arrangement of the by-pass includes a slip-joint connection 13 adapted to permit of adjustment of the several sections and to facilitate the assembling of the connection on the pump-barrel. The by-pass so arranged provides a greater intake area to supply the pump-chamber with fluid on the Lip-stroke of the piston, and by reason of the double connection to the umpchamber insures a constant supply o fluid to the chamber iu case of failure of one of the valve connections to admit fluid to the chamber.

A by-pass 14, preferably a continuation of the oy-pass 11 connects to the pump-chamber at port 10, and terminates in the pumptubing, or working-barrel at a point 15 above the uppermost position of the traveling valve. This section of the icy-pass also is provided with a pair of downwardly seating check-valves 16 and a slip-joint connection 17, which are in structure similar to valves 12 and joint 13. The function of this section of the by-pass is to convey fluid from the pump-chamber on the downward stroke of the traveling valve, from between the valves of said chamber to`aJ point in the pump-tubing' above the traveling valve. The enlarged detail Fig. 2 of the drawing shows the preferred construction of the check-valve' and slip-joints of both sections of`\the b vi pass. These valves are especially designed,4 for the particular arrangement shown/"and :include structure formingl the subject of a separate application for Letters Patent filed by me of even date herewith, Serial No. 176,559.

ther forms of check-valves and by pass pipe structure may be used which functionV in a similar manner, and it is to be understood I do not limit my invention to the .precise arrangement of the check-valves and by pass as shown. The by-pass may be arranged in two separate sections and have separate and distinct connections with the pump-chamber as shown and described in an application filed of even date herewith. I prefer, however, to employ the structure as illustrated, as in this manner the invention may readily be applied to the regular pumping outfit, the attenuated form of check-valve permittingr close positioning of the by-pass pipe to a standard' Workingbarrel which makes a compact structure which may readily be inserted through the well-casing. y

In the operation of my improved pump,

upward movement of the Working valve or piston 6 acts to draw fluid into the pumpchamber through standing valve 5 and through the by-pass 11 and port 10 and move up the column of fluid above the working valve. Downward movement of the valve acts to displace the fluid so drawn in, by forcing the fluid through the check-valve of the piston as in the usual manner, and through port 10, and by-pass 14 into the tubing above the traveling-valve. The port 10 and the opening of the valve in the piston 6 provide openings for the escape of the fluid of the chamber when under compression of the downwardly traveling valve, the combined area of these o enings permitting' of rapid displacement o the fluid. It will fluid in this manner, the resistance in the Apump-chamber by Huid'to the descending piston is greatly relieved, and at the same time the port 10 allows gas in the pumpchamber to escape, thus relieving the piston entirely of burden from compression and permitting more rapid reciprocation of the piston, resulting in increased flow or capaoity of the pump per pumping hour. Furthermore, by reason of the by-pass connections from the strainer to the tubing above the traveling valve, when fluid is standing in the casing above the working barrel, head pressure in the casing will force the fluid up through the by-pass to its own level in the tubing thereby greatly increasing the pumping efliciency.

It will be seen from the foregoing description of the structure and its operation that l have provided a 4pump of high pumping efficiency, which is simple and compact in structure and which may readily be applied to the standard pumping outfitsl What I claim is:

1 'In a pump for oil or other deep wells, the combination with a working-barrel having a standing valve for admission of fluid at the lower end thereof, `of a single piston operable in the barrel for suction offthe fluid to and 'for expulsion of the fluid from the barrel in pumping operation, said piston controlling said valve, and an auxiliary fluid passage having independent communication with the source of fluid supply and communicating with the barrel at opposite sides of the iston.

2. In a pump for oil or other deep wells` the combination with a working barrel having a standing valve for admission of fluid at the end thereof, of a single piston opereating with the barrel at opposite nidee ot the piston, and a valve in said auxiliary paaage influenced by the movement of said piston for controlling flow of fluid to the barrel.

3. ln a pump for oil or other deep welle, the combination with a working barrel havingr a standing?T valve Jfor admit-sion ol fluid at the end thereof, of a single piston operable in the barrel for ut-tion of the tluid to, and for expulsion of the tluid from the barrel in pumping operation, .-,aid pif-ton controlling;l .-aid valve, an auxiliary fluid pimsage having;- independent communieation with the Amurce ot luid supply and coniniunieat'iner with the barrel at a poilu` between the standing valve and the pieton, and means t'or liv-passing fluid from the barrel around the pieton to its oppositeI laide.

vl. 1n a pump for oil or other deep welle, the combination with a workingl barrel having a standing valve for adn'lianion ol' tluid at the end thereot', ot' a ingle piston operable in the barrel for auction et the fluid to, and t'or expulsion of the fluid from the barrel in pumpingoperation, unid piston controlling said valve. an auxiliary tluid paar-'age having` independent communication with the barrel at a point between the pif-- tou and the standing valve1 a. valve in ,said

passage influeneed by said piston tor con-v trolling the flow of fluid through said paenage, and a paaaag'e 'f'or b v-paeaing fiuid around the piston having a permaiuntljir open port communicating with the barrel between the piston and the Standing' valve.

5. ln a pump for oil or other deep well-g the combination with a working barrel. having a standing valve t'or admission of tluid at the end thereof, of a single pieton operable in the barrel for auction ot the. fluid to, and for expulsion of the. fluid troni the barrel in pumping operation, Said pieton rontrolling said valve, an auxiiiary fluid passage having independent communication with the source of fluid aupplv and communicating by an inlet port to the barrel at a point between the pieton and the Standing valve, and means for limiting the, down- Ward movement of the pif-ton to a point above the inlet port of said auxiliaryT paasage.

6. In a pump for oil or other deep wells1 the combination with a working;r barrel havingia standings,r valve for admission ot fluid at'the end thereof. ot a eingle piston operable in the barrel for suction ot' the tluid to`y and for expulsion of the fluid fr: the

operatioxn aaid piston controlling Aaaid valve, an auxiliary luid par-sage having independent communication with the source ot fluid supply and communicating by an inlet port to the barrel at. a point between the pistoni and the standinr valve` and nie-ana carried by the standing valve for limiting the downward movement ot' the pieton to a point above the inlet port ot' :laid auxilialwv paaaage.

T. A pump tor oil or other deep wells comprising a worlting barrel and ita piston, a Vtandingr valve in the lower end ofi the barrel t'or admission of fluid. and a separate fluid admiasion )manage hauling,1 independent rolumunication with the yaource ot' fluid uppl)Y and communicating with the barrel at oppo iie widen of the pieton.

S. pump t'or oil or other deep wells1 romprieing a working barrel and its piston, a tending valve in the lower end ot the barrel tor admianion ot fluid, and a separate lluid admi-sion passage having' iinlependent ronnnunieation with the source of fluid .auppljyv and eonnnunicating with the barrel above the piston and having; an admisaion port to the barrel at a point between the pi-ton and the standing' valve.

l). ln :l pump for oil or other deep wells, the combination with a working barrel havingl a Standing' valve and including theV anehor tubing. ot a fluid by-paes having independent eonnnuniration with the anchor tubing: beneath the standing valve and conimunieatinewith the barrel between the atandinar valve and the piston, and means tor bypassing fluid trom the barrel around the pieton from beneath the piston.

l0. Aln a pump for oil or other deep wells, the combination with a working-barrel and ita piston and having' a standing valve for admiaeion ot fluid, ol. a Iepm-ate fiuid admis- `ion passage having independent communication with the source ot' fluid supply and eonununiratiinlr with the barrel between the pieton aud the Staiulingr'valvm a downwardly seating cheek-valve in said paasage, a paran-age Vtor lay-passing fluid around the piston, and a valve in aaid yaecond passage for controlling: the flow ol'l fluid therethrough.

lin testimony whereof, l the Said VxNCEN'r ll. Fawxt'w. have, hereunto Set my hand.

VINCENT ll. lFRiMtllS.l

barrel in pun'ipnig lllitnesses: l

(lawn l'loorox Manni, lionne.

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