US2121927A - Deep well pump - Google Patents

Description

June 28, 1938. J. PAUL DEEP WELL PUMP 2 Sheets-Sheet 1 INVENTOR.

ATToNEY.

. Filed Dec. 21, 1936 Patented June 28, 1 938 DEEP WELL PUMP Julius Paul, Duluth, Minn, assignor of one-hall.

, p to M. sellwood, Duluth, Minn.

Application December 21, 1936; Serial No. 116,946-

6 Claims.

This'invention relates to double acting deep well fluid operated pumps, the principal object being to provide a more practical, simple and durable pump, efliciently and dependably operable at great depths, especially in the art oi oil pumping.

Another object is to provide such a pump which will effectually care for air or gas encountered within such pumping operations.

Still other objects and advantagesgof the invention will appear in the following description thereof.

Referring now to the accompanying drawings, forming part of this application, and wherein like reference characters indicate like parts:

Figure l is a broken central vertical section on the line l-'-l of Figures 2 and 3 showing a pump unit within a common oil well casing, except that the showing of the rotative twin gate valve is on the line |l' of Figure 4,for a better comprehension of the registration of the various ports a during the operation of the device subsequently set forth. The figure is a somewhat unusual showing in that thehorizontal dimensions are approximately one-half full sizeswhereas the vertical dimensions of the pump unit are materially foreshortened so that the entire structure may be illustrated in one figure.

Figures 2, 3, 4, 5, 6, '7, 8, 9, and 10, are transverse sectionsrespectively on the lines 2-2, 3-3, [-4, 55, 66, '|'I, 88, 9'9,.and Iii-i0, Figure 1. I In Figure 1 there is a further modification from the usual representation of a practical embodiment of the invention, in that the parts of the motor and pump illustrated as integral are cross hatched with alternate full and dotted lines so that these simultaneously movable parts are more readily comprehensible.

I represents the casing of an ordinary oil well, theportion thereof here illustrated being that found adjacent the bottom of the well and within the oil therein, 2 represents the pump cylinder within the casing, the lower end of whichcylinder is attached to an ordinary packer, illustrated at 0, within the casing, and the extreme reciprocable within the oil in the'well. The upper lower end of the pump suction pipe 82 is normally -portion of this cylinder is provided centrally the surface of the well, and the former being for the care of gas delivered by thepump and the latter for service solely as a standpipe in insuring uniformity of pressure in the pump and pro- I vided with a suitable adjustable safety valve, not

shown, to control the working pressure of the 4 power fluid. The connection, above the motor of the pump, to the gas standpipe 4 comprises an axially disposed. depending nipple 6 within which is reciprocably mounted the uppermost end of the hollow piston stem 1, about whichmay be fixed any number of stufling glands, one of which is suggested at 8 to insure against undue leakage. Externally of this nipple-section 6 is a somewhat reduced portion 9 of the pump cylinder forming a chamber l0 intermediate of the nipple 6 and about same internally -of'the upper end of the pump cylinder, and which chamber also communicates as by the passageway II with the standpipe 5. Within this reduced portion 9 of the pump cylinder is mounted the vertically intermittently reciprocal cylindrical valve l2, having the annular port or passageway I 3 thereabouts. it being the exhaust port of the pump control valve. This valve cylinder is provided with the power supply ports i4 and I5 upon opposite sides thereof,- and which ,ports respectively register alternately with the passageways l6 and l'|,'their relative position with the gate valve 20 being shown in dotted lines, Fig. 3. The valve I 2 in its present position is shown as supplying power through the port it to the passageway I 6, while the passageway I1 is communicating through'the exhaust port I! .and discharging out of the port its present position the valve l2 as is obvious willhave permitted power fluid to'have coursed the passageway l6 into the annular chamber l9 in which is installed the swingable gate valve 20.

and will have obviously swung this gate valve anti-clockwise as viewed in Fig. 3 of the drawings, simultaneously turning the cylindrical valve stem 2| to the position illustrated in Figs. 3 and 4 of the drawings. The limit of throw of the gate valve 20 in either direction is governed by the arcuate projections 85 of the block 86 fixed within the opposite side of the chamber i9. This hollow cylindricalvalve stem 2| carries radially disposed upon its lowermost extremity the twin gate valve member 22 operable swingably within the annularchamber 23 of the pump cylinder, it

being noted that about the enlarged central portion of the hollow valve stem 2| is installed a suitable ball bearing 24 upon which,rests the combined block and floor member 86, the floor portion 25 forming the bottom of the chamber l9 in which the gate valve 20 operates. Also at the lower end of this hollow valve stem 2| is a second ball bearing 26 to insure as nearly as possible nonfrictional action of the rotation of this hollow valve stem 2|.

It will be, noted that the twin gate valve 22 is provided with a passageway 21 between the two lateral terminals thereof which at all times is in direct communication with the central power passageway indicated at 28 in the various views so that power fluid is always available therein, and while the passageway 21 is communicating through the port 29 to the vertical semi-annular passageway 30 in one side wall of the pump, it will be furnishing power directly against the uppermost end of the motor piston 3|, and, as before stated, will, when in the position illustrated and power is further applied, force the motor piston to its final lowermost position which will complete the downward stroke of the control valve |2 by'action of the ring 32 fixed about the piston stem 1 engaging the finger-like member 33 formed integral with the bottom of the valve I2, and extending radially inwardly and about the stem 1 as more clearly shown in Fig. 2 of the drawings. At this change of the port communications of the valve l2, it will be noted that instantly power fluid from the interior of said valve will pass through the port I5 and passageway IT to that portion of the chamber |9 upon the opposite side of the gate valve 20, and instantly reverse its position, to that indicated by the' dotted line 34, Fig. 3, from thatpreviously described, simultaneously rotating the twin gate valve 22 to its opposite position, as indicated by the dotted line 35, Fig. 4, which controls the opposite line of communication to the motor piston just described, thus opening up communication for the power fluid from about the stem 1 through the passageway 21 of the twin gate valve 22 to the semi-annular chamber 36 on the opposite side of the upper end of the motor section of the pump cylinder; the interior of the upper portion of this section or core being illustrated at 31 and in which is mounted the lowermost ball bearing 26, previouslydescribed, and below which may be installed any desired form of packing gland, as illustrated at 3B; the exhaust from the chamber l9, of course, freely following the then opened communication to the space 4| intermediate of the pump cylinder and easing I through the passageways and ports l6, I4 and 50.

Just below the upper enlarged central portion or core 31 of the motor section of the pump cylinder is an annular passageway 39 communicating with the passageway 36, so that power fluid now coursing this passageway 39 will be led to the under or lower end of the motor piston 3| and return it to its uppermost position or end of its stroke, while the exhaust from the upper end thereof will be forced through the passageway 39 and ports 29 and 23 behind the twin gate valve 22, thence through the passageway 49 into the space 4| between the casing and the pump cylinder. At the conclusion of the uppermost stroke of the motor piston 3| carrying with it the stem 1, which latter is provided with a ring 42 fixed thereto similar to the ring 32 previously described and spaced therefrom the proper distance, the control valve 2 will be raisedagain to the position illustrated in the drawings and initially described, ready for another cycle.

Now the pump pistons 43 for pumping oil and 44 for the care of gas, though it may at times handle some oil, being rigidly fixed to and carried by the depending outermost extension 56 of the motor piston 3|, will obviously reciprocate with the action just described of the motor piston, and I shall now proceed to describe the flow of the pumped material, first through the pistons.

Assuming as before stated that the valve l2 of the motor and the motor piston 3| are in their unfinished downward stroke, the pump pistons will be in like position, as shown, and the oil remaining in the chamber 46, below the piston 43, will obviously be forced downwardly through the ball valves 41, (of which there may be any desired number circumferentially about the tubular connection 48 of the two pump pistons), and outwardly into the space 4| between the pump cylinder and easing; while the gas in the similarly shaped and positioned chamber 49 below the piston 44 will be forced through the passageway 5| and the ball valve 52 and passageway 53 into the bore 54 of the hollow valve stem 1. Here it must be noted that any air or gas thus liberated within the hollow stem 1 which leads to the standpipe 4, is entirely freed and avoids any obstruction to the operation of the pump, and there is located at 55 a ball valve of predeter mined pressure capacity under ordinary pumping conditions to function at say fifty pounds pressure, so that any oil which may have been drawn therein and creating such pressure may escape through said valve.

At this time during the continued down stroke of the pump pistons 43 and 44, suction will be created within the chamber 56 above the piston 43 drawing oil through he ball valve 51 from the interior 59 of the tube 48, as communication of oil to said tube through the piston 44 is accomplished by the passages 69, see Figs. 8 and 9, simultaneously with like action in the chamber 6| externally of the tube 49 above the piston 44 which will draw gas through the passage 62, ball valve 63, and out of the central passageway 84 in the lower extremity of the pump, thus simultaneously filling these two chambers, 56 with oil, and 6| with gas, to be forced therefrom. by the reverse action or upstroke of the pump pistons 43 and 44. Now when this upward stroke takes place, caused as is obvious by the reverse action of the motor piston previously described, the oil within the chamber 56 will be forced upwardly through the ball valves 64 in the stationary core 65 of the pump cylinder (the latter being provided with a suitable packing gland 66) thence upwardly through the passageways 61 into the chamber 68, through the interior 69 of the tubular connection 10 between the stationary cores 65 and 31 into the chamber 1| within the core 31 and'thence through the discharge port 12 into the space 4| intermediate of the pump cylinder and well casing and on up to the surface of the well. This action of course is simultaneous with the discharge of the gas within the chamber 6| above the piston 44 which passes through the passageway 13 and ball valve 14 into the bore 54 of the hollow valve stem 1.

Obviously when the two pump pistons 43 and 44 are on their upward stroke discharging the contents of the chambers 56 and 6|, just described, they will tend to form a vacuum in the chamber 46 beneath the piston 43, and also in the chamber 48 beneath the piston 44, and which will result in the chamber 46 being filled by passage of the oil from the chamber 59 in the tubular connection 48 through the ball valve I8 and passageway 19 into .said chamber, and, in,

motor piston 3| and the uppermost pump piston 43 form opposite ends of the cylinder 58 which recipro'cates externally of the stationary core 65 and internally of the pump cylinder 2, thus forming ample length of piston for any desired number of piston rings suggested at 83, and that the connection of the pump cylinder to the packer 0 is accomplished by the foot member 88 in which may be installed any desired number or form of packing means as suggested at 81; it being deemed non-essential throughout the drawings to illustrate the threaded connections of thevarious parts of the pump.

I Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

1. A deep well fluid pump comprising a casing, a cylinder within said casing, motor, oil pumping and gas pumping pistons within said cylinder and connected to operate in unison, a source of fluid power and intake and exhaust valves for directing said fluid power alternately to opposite ends of said motor piston, intake and exhaust valves for admitting oil to opposite ends of said oil pumping piston and discharging it therefrom to the surface of the well, intake andexhaust valves for admitting gas to 0pposite ends of said gas pumping piston and discharging it therefrom to the surface of the well independently of said oil discharge, the discharge from said gas piston extending through said other pistons. I

2. A deep well fluid pump comprising a casing, a cylinder within said casing, motor, oil pumping and gas pumping pistons within said cylinder and connected to operate in unison, a source of fluid power, reciprocable valve means for controlling intake and exhaust valves for directing said fluid power alternately to opposite ends of said motor piston, intake and exhaust valves for admitting oil to opposite ends of said oil pumping pistonand discharging it therefrom to the surface of the well, intake and exhaust valves for admitting gas to opposite ends of said oil discharge, the discharge from said gas piston extending, axially of said other pistons and means for operating said reciprocable valve means.

3. A deep well fluid pump comprising a casing, a cylinder within said casing, a motor piston within said cylinder, a combined oil and gas pumping piston within said cylinder and operable in unison with said motor piston, a source of power fluid, intake and exhaust valves for directing said power fluid alternately to opposite ends of said motor piston, intake and exhaust valves for control of oil to one end of said combined piston and discharging it therefrom to the surface of the well, and intake and exhaust valves for control of gas to the opposite end "of said combined piston whereby to pump gas separately from the well, and separate means to conduct the oil and gas to the surface of the well.

4. A double acting deep well fluid operated pump having a power piston a inwgas and fluid pumping pistons, all of saidpistons being operable in unison, an outer casing, a cylinder concentric with and spaced from said casing and within which said pistons operate, a valve within the upper end 'said cylinder for control of power fluid alternately to opposite ends of said power piston, means axially of all of said pistons to conduct gas from above the fluid in the well to the surface of the ground, valve means in said gas pumping piston to control the flow of gas therethrough to said axial means, and valve means in said fluid pumping piston to control the flow of fluid therethrough.

'5. In a deep well fluid operated fluid and gas pump, anouter casing therefor, an inner pump cylinder, a fluid motor therein, an axial power fluid supply through said casing to operate said motor, fluid and gas pumping pistons in said cylinder and operated by and in unison with said motor, an independent gas discharge within said casing to receive the pumped gas and conduct it to the surface of the well, a standpipe within said casing for automatic pressure control of 'fluid operated pumps comprising a hollow piston stem, a combined motor piston, fluid pumping piston and air or gas pumping piston fixed to said piston stem in spaced relation, valve controlled passageways through said fluid pumping piston for the alternate control of fluid passing therethrough, and valve controlled passageways in said air or gas piston for the control of air or gas passing therethrough to the interior of said hollow piston stem.

- JULIUS PAUL.

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