US2046588A - Pump - Google Patents

Description

July 7, 1936. c. w. sPRoULl.

PUMP

Filed April 3, 1934 I5 Sheets-Sheet l 3 Sheets-Sheet 2 PUMP July 7, 1936. c, w. sPRoULl.

' Filed April s, 1934 IIII July 7, 1936. c. w. sPRoULL PUMP 3 Sheets-Sheet 3 Filed April 3, 1934 Patented July 7, 117936 UNITED STATESv PATENT OFFICE PUMP Charles W. Sproull, Houston, Tex. Application April 3, 1934, Serial No. 718,746 Claims. (Cl. 10S-155) This invention relates to a pump.

An object of the invention is to provide, in a deep well pump, novel means for controlling the pilot valve whereby the application of the oper- 5 ating iiuid to the pump plunger, by the'master valve, is also controlled. Y -Another' object is to provide novel means for operating the pump plunger which is specially adapted to utilize an operating liquid.

A further object is to provide, in a pump, a

novel combination of working barrel and displacement plunger. t

With the above and other objects in view, this invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification, and illustrated in the accompanying drawings, wherein:

Figure 1 shows an elevational view, partly in 0 section, of the upper portion of the pump shown positioned in a well casing in a well.

Figure 2 shows an elevational view partly in section of the lower end thereof.

Figure 3 shows a cross sectional view taken on the line 3-3 of Figure 8.

Figure 4 shows a cross sectional view taken on the line 4--4 of Figure 9. 1

Figure 5 shows a vertical sectional view of the upper end of the' pump showing the master valve and pilot valve in position to permit the application of motive nuid to the plunger piston to eiect the down, or power, stroke of the plunger.,

Figure 6 shows a vertical sectional view o! an intermediate portion of the pump showing the pilot valve controlling means.

Figure 7 shows a vertical sectional view showing the upper end of the working barrel and the displacement plunger associated therewith in its upper position, or in position to begin its power stroke, showing also the associated parts o! the Dump- Figure 8 shows a vertical sectional view of the upper portion of the pump, showing the valves in position they will occupy atthe beginning of the back stroke, or up stroke, of the plunger.

v Figure 9 shows a vertical sectional view of the pilot valve controlling mechanism in position, to effect the reversal of the pilot valve to apply the operating uid to effect the back stroke, or up stroke, of the plunger, and

Figure 10 shows a vertical sectional view showing the upper end of the working barrel and the plunger associated therewith in position to begin its back stroke. Referring now more particularly to the drawings, wherein like numerals of reference designate similar parts in'each of the iigures, the numeral I designates a tubular outer housing whose upper end is connected to the tubular string 2 which extends to the ground surface and which 5 forms a conduit for the application oi the operating fluid, such as oil, water, or other liquid to the Pump- Connected to the lower end of the housing there is a tubular coupling 3 containing the stuiiing box 10 l through which the hollow displacement plunger 5 operates. The lower end of the coupling 3 is extended down into the tubular packer support 6 and carries a 'packing assembly I comprising cup rings and spacer rings therearound and forming 15 a packing between said coupling and support. The packing assembly is. retained assembled on the coupling by means of the ring nut 8 adapted to rest on an inside seat 9 in the packer support. Surrounding the packer support there is a packer go I0 which forms a uid tight seal between the support and the well casing I I.

Beneath the packer support and attached thereto there is a liner I2 all or a portion of which may be formed into a screen such as I3 adapted 25 to be set opposite the producing stratum in the well.

A tubular working barrel, or cylinder, I4 has its upper end connected to the coupling 3. The lower end of this working barrel has a coupling a0 I5 thereon provided with a seat to support the upwardly opening standing valve structure I6. Attached to and depending from the coupling I5 there is a tubular gas anchor I1 which may extend down the desired distance into the well. 35

The liquid displaced from the cylinder I4 passes out from the upper end of said cylinder through the back pressure valves I8, I8 and thence through the inverted U-shaped tubes I9, I9 into the space between the housing I and casing Il 40 and passes thence up through said casing and out through the flow line 20.

It will be noted that the string 2, the housing I and the entire pumping Lapparatus may be. 45 withdrawn as a unit from the well leaving the packer I0 and the well screen in the well, and may be re-inserted, also as a unit, into the well and seated in the packer support.

' Within the lower end of the housing I and 50 spaced therefrom there is a cylinder 2l whose lower end is connected to the upper end of the coupling 3 and is provided with the. inlet ports 22 adjacent the upper end of said coupling. A piston 23 works within this cylinder 2| and is 55 i attached to the upper end' of the displacement plunger 5.

As more clearly shown in Figures 5, 6, 8 and 9, the housing I is composed of sections, connectedtogether, and the walls of the upper section are. thickened, as also shown in Figure 3. The upper end of the cylinder 2| is reduced and threaded into the lower end of the upper section of the housing I.

This upper end of the housing I is formed with the master valve cylinder 24 and beneath it, the pilot valve cylinder 25, said cylinders being separated by the partition 26. The upper end of the cylinder 24 is closed by the plug 21 and the lower end of the cylinder 25 is closed by the stuiing box 28 through which the pilot valve stem 29 works.

As shown, the master valve comprises the pis-A tons 38, 3|, 32, and 33 which are fitted in the cylinder and spaced apart and held in xed relation by the valve rod 34. On the ends of this rod are the projecting end caps 35 and 36 which maintain the end pistons of the valve spaced from the opposing ends of the cylinder.

In the pilot valve'cylinder there are the spaced `pistons 31, 38 which are fitted into the cylinder and are iixed in spaced relation on the piston rod 39. 'This pilot valve assembly is xed to the 'upper end of the pilot valve stem 29. A plunger 48 is iixed to the other `end of the stem 29 and is located in the tubular fixed sleeve 4I of the pilot valve controlling device. The upper end of the sleeve 4| is reduced and is xed to the stuihng box 28. This sleeve depends within and is spaced from the cylinder 2|.

A sleeve valve 42 telescopes over the lower en of the sleeve 4i and its lower end is closed by the plug 43. A shift rod 44 is attached to and depends from the plug 43 and works through a central bearing in the piston 23. A head 45, on the lower end of the rod 44, is engageable with said piston 23.

Assuming that the displacement plunger has just completed its up stroke, the master valve will be in its upper position, as shown in Figure 5, the operating iiuid, such as oil or water, under pressure will pass downwardly through the channel 46 and through the port 41 into the cylinder 24 between the pistons 3|, 32, and thence out through the port 48 into the channel 49, 'and thence down through saidchannel, through the port 58 into the cylinder 2| and will operate against the piston 23 to drive said piston, and the displacement plunger 5, downwardly, displacing the liquid in the working barrel I4, said displaced liquid passing out through the back pressure valves I8 and tubes I9 into the casing il outside of the housing I. The inverted U-shaped tubes'will prevent the sand from falling back down into, and clogging the valves I8. As the piston 23 moves downwardly, the iiuid beneath it in the cylinder 2| will be forced out through the ports 22 and up around said cylinder 2| and up through the channel 61 through the port 68 into the cylinder 24 and thence out into the uid being pumped through exhaust port 12.

As the piston 23 moves downwardly it will engage the head 45 and pull the sleeve valve 42 downwardly with it. 'Ihis sleeve valve has'the longitudinal side slot 5| arranged to register, alternately, with the upper and lower ports 52 53 through the sleeve 4|, and said sleeve valveA also has the longitudinal side slot 54 arranged to move into and out of registration with the port 56 through the sleeve 4I. 'I'he sleeve valve 42 is.

held against turning on the vsleeve 4|, but is permitted to move longitudinally thereon, by means of the key 56 carried by the sleeve which projects through the longitudinal slot 51 of the sleever` valve 42.

The lower end of the sleeve 4I carries an expansion ring 58 which frictionally engages the sleeve valve 42, and which normally holds the valve 42 against movement relative to the sleeve. There is a channel 59 which leads downwardly from the upper end of the housing I and which enters the cylinder 25', through the port 68, between the pistons 31, 38, and the lower end of the cylinder 24 has a port 6I leading from Hwhich is-'the channel 62 which enters the cylinder 24, through the port 63, this last mentioned port being spaced above the port 68. There is also a channel 64 connecting the ports 65, 66 at the upper end ofthe cylinder 24 and spaced above the lower end of the cylinder 25, respectively. i

There is also a channel 61 which is connected into the cylinder 24 through the port 68, saidv last named port being located beneath and spaced from the port 41, and this channel 61 leads downwardly into the space between the cylinder 2| and housing I.

The cylinder 24 has an outlet 69 leading 4out from between the pistons 38, 3| .into the space between the housing and casing and the cylin-v der 24 likewise has an outlet 18 leading from the upper end thereof into said space. While the operating iiuid is being applied to the piston 23 the pressure of said fluid between the pilot pistons 31, 38 and beneath the master v lower end of the cylinder 25 having an exhaust' port 1I into the casing II. l

As the sleeve valve 42 moves downwardly the port 52 which, upon initial movement of the valve, is at the upper end of the slot 5|, will be closed and a partial vacuum will be created in the sleeve 4| and valve 42 beneath the piston 48 and at the same time the slot 54 registers with the port 55, which upon such initial movement is closed, and the operating fluid, under pressure will now enter through the port 55 above the piston 48, and said pressure, assisted by the partial vacuum will cause the piston 48 and the pilot valve to move downwardly to the position indicated in Figures 8 and 9.

The pilot piston 31 is now located between the ports 68, 63 and the operating iiuid may pass' down through the channel 59 and back up through the channel 64 above the master valve and will force the pistons of the master valve downwardly, the piston 3| moving into position between the ports 41, 48 and the piston 32 moving into position beneath the port 68 to the end that the operating iiuid may now passv downwardly through the channel 46, the port 41, the cylinder 24 between pistons 3|, 32 and thence out through port 68 and down through the' channel 41 around the cylinder 2| and in through the ports 22 beneath the piston 23 and said piston, and the displacement plunger 5 will be elevated and an additional charge -of the pumped liquid will be drawn into the working barrel I2 .through the standing valve I6.

In Figure 9 the controlling mechanism for the pilot valve is shown in the -position it will occupy at'the end of the down stroke, or discharge stroke, of the displacement plunger with the ports 53, 55 open to admit operating uid to opposite sides of piston 40. As the piston 23 moves upwardly it will strike the lower end of the sleeve valve 42 and move the same upwardly into position shown in Figure 6. Upon initial upward movement of the sleeve valve 42 the port 53 will be closed but the port 55 will remain open and as the lsleeve valve continues its upward movement the operating uid trapped in the sleeve 4I and valve 42 beneath the piston 40 will operate against and elevate said piston 40 causing an upward movement of the pilot valve, carrying the same into position indicated in Figure 5, or to original position with the parts in position for beginning another power stroke.

The slots I 54 are elongated, longitudinally, to

` permit the ports 52, 55 to be maintained open for a time to give the necessary lead, that is, while the pilot valve is causing the master valve to move toward the end of its stroke in either direction', the piston 23 can continue to travel a dis,

tance limited only by the length of the slots 5|,

54 until the master valve has reached the limit of its movement in either direction and thus providing liquid cushions Ior the piston 23 to cushion it at the end of its stroke in either direction. Furthermore by reason of .the fact that the slots 5|, 54 are elongated the piston 23 is permitted to rest on the upper end ofthe coupling 3 when the pump is not being operated without hanging on the head 45.

What I claim ist 1. In a pump the combination with a working barrel adapted to be located in a well, of a packer about the barrel forming a seal between the barrel and the walls of the well, said barrel being insertable into and removable from the packer and having a valve controlled inlet beneath said seal'and a. valve controlled outlet above the seal, a displacement plunger spaced from the barrel and a mounting for the plunger adjacent the barrel through which the plunger works into the barrel, said mounting forming a fluid tight seal about the plunger.

2. In a pump the combination with a working 50 barrel adapted to be located in a well, of a packer about the barrel forming a seal between the barrel and the walls of the well, said barrel having a valve controlled inlet beneath said sealand a valve controlled outlet above the seal, a displacement plunger adapted to work into the barrel, but

being spaced therefrom, and a mounting for theplunger adjacent the barrel through which the plunger works into the barrel, said mounting forming a uid tight seal about the plunger, and means for reciprocating the plunger.

3. In a pump, a working barrel adapted to be located in a well, packing forming a seal between the barrel and walls of the well, said barrel having a valve controlled inlet beneath the packing and a valve controlled outlet above the packing, a bearing at the upper end of the barrel, a displacement plunger working through said bearing into the barrel, said plunger being spaced inwardly from the wall of the barrel.

4. In a pump, the combination with a working barrel adapted to be located in a well, of a packer about the barrel forming a seal between the barrel and the walls of the well, said barrel having a valve controlled inlet beneath the seal and a valve controlled outlet above the seal, a displacement plunger arranged to reciprocate in the barrel and forming a fluid tight joint with the barrel above the outlet, sealing means around the barrel and located between the barrel and packer, said barrel and sealing means being withdrawable from and insertable through the packer.

5. In a pump, the combination with a working barrel adapted to be located in a well, of a tubular packing support, a packer surrounding the support and forming a fluid-tight seal between the support and the walls of the well, a tubular outer housing having a coupling thereon which is extended into the packer support and to which the working barrel is connected, a packing assembly between the packer support and the extended end of the coupling, means for controlling the advance of the well liquid upwardly through the working barrel, a displacement plunger arranged to reciprocate in the barrel and forming a fluidtight joint with the barrel above said controlling means, said barrel and packing assembly being withdrawable from and insertable through the packer support, and means for reciprocating the plunger.

. CHARLES W. SPROULL.

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