US3195641A - Bottom hole pump retainer - Google Patents

Description

July 20 1955 J. G. BECKER .3;l95,64l

y BOTTOM HOLE PUMP RETAINER Filed May 6, 1963 2 Sheets-Sheet 1 AT TOR NEY July 20, 1965 J. G. BECKER BOTTOM HOLE PUMP RETAINER 2 Sheets-Sheet 2- Filed May 6, 1963 FIGA INVENTOR. JOHN G. BECKER ATTORNEY f 3,195,641 BOTTGM HGLE PUMP RETAINER John G. Becker, 260 Euclid Ave., Long Beach, Calif. Filed May 6, 1963, Ser. No. 278,173 1 Claim. (Cl. 16d-106) This invention relates to a bottom hole pump retainer, and particularly for pumps which are placed in oil or water wells, and where these wells are relatively shallow, that is, about one thousand feet in depth, more or less.

An object of my invention is to provide a novel retainer for a rotary type of bottom hole pump, and where this retainer may also be termed an anchor, a hold down, or a positioner, and whereby the pump is held against both rotary and vertical movement during its operation.

Another object of my invention is to provide a novel bottom hole pump retainer in which there is an expandable boot or bag which is pressed outwardly against the tubing by the hydrostatic head of uid in the tubing.

Another object of my invention is to provide a novel bottom hole pump retainer in which the expandable sack or boot can be collapsed to permit removal of the pump by reversing the rotation of the pump to force uid back into the formation.

Still another object of my invention is to provide a novel bottom hole pump retainer of the character described which can be removed by means of the drive shaft and without removing the tubing in which the pump operates.

Other objects, advantages and features ot invention may appear from the accompanying drawings, the subjoined detailed description and the appended claim.

In the drawings:

FIGURE 1 is a fragmentary side elevation of the driving mechanism at the upper end of the well casing.

FIGURE 2 is a fragmentary longitudinal sectional view of the upper portion of my pump.

FIGURE 3 is a fragmentary longitudinal sectional view of the lower portion of my pump retainer.

FIGURE 4 is an enlarged sectional View taken on line 4 4 of FIGURE 2.

FIGURE 5 is an enlarged sectional view taken on line 5 5 of FIGURE 3.

Referring more particularly to the drawing, the numeral l indicates the casing which extends vertically into the well, and which is provided adjacent its lower end by a perfor-ated =or slotted ior screen section 2 through which uid from the formation can pass. At the surface a drive motor of an appropriate type 3 is provided, and a drive shaft 4 extends from this motor downwardly in the casing 1 to the pump, which will be subsequently described. A string of tubing 5 extends downwardly into the well within the casing 1, and this tubing projects also into the perforated or screen area 2 in order to collect iluid from the well. The upper end of the tubing 5 includes a fitting 6 to which a suitable pipe is attached, all of which is usual and well known in the ant. A pump cylinder 7 is positioned within the tubing 5 and adjacent the lower end of this tubing. The pump cylinder "l includes at its upper end a spirally convoluted section 3. A pump piston 9, also convoluted, is positioned within the section 8 and is xedly attached to the drive shaft 4 so that the rtoor may be continuously rotated within the section or barrel 8 to pump fluid upwardly in the tubing United States Patent O ldlii Patented July 20, 1965 ice S. The piston 9 is continuously rotated by the motor 3, as required, to produce iluid from the well. The coupling 10, which screws the rotor 9 to the drive shaft 4, is preferably somewhat larger in diameter than the rotor 9, so that this coupling will engage a pair of spaced pins 11--12 which extend transversely across the cylinder 7 of the pump, and these pins are engaged by the tting 10, as shown in FIGURE 4, when it is desired to remove the pump to the surface and without disturbing the tubing 5. A suction tube 13 is preferably of smaller diameter than the barrel 7 of the pump, and this tubing may be considered an integral part of the barrel, or it may also be a separate piece but xedly attached to the barrel by means ot appropriate pins, screws, bolts, welds, or the like. The barrel 7 may also include a number of superimposed sections which are threaded, connected, or attached, since the pump barrel may be of considerable length and it would, therefore, be desirable to form the barrel of a number of pieces which, however, are lixedly attached and serve the purpose of a single barrel.

The bottom hole anchor or retainer consists of a flexible and extensible bag or boot 14 which surrounds the reduced diameter tube 13. The outer diameter of the boot 14 is thus somewhat larger than the outside diameter of the barrel 7. The boot 14 is attached to the tubing 13 in the following manner: At the lower end of the boot 14 a packing or seal 15 is provided which surrounds and tightly lseals against the tubing 13. A suitable metal band 16 surrounds the lower end of the boot 14 and compresses the boot and the packing tightly against the tubing so as `to prevent leakage at this point. The tubing 13 may be provided with ribs 17 adjacent the upper end of the tube, and spaces 18 are thus provided between the ribs through which iluid can flow in order tov lill the boot 14. The upper end of the boot surrounds the ribbed portion of the tube 13 and is tightly clamped in a position by means of a suitable metal ring or clamp 19. Suitable packing rings 20 surround the upper end of the boot 14 and are spaced between the outside of the boot and the inside of the tubing 5. Thus a means is provided to prevent fluid from owing on the outside of the boot 14, but directs this uid inwardly so as to flow inside of the boot and distend the same tightly against the tubing 5.

IN OPERATION The casing 1, having been previously set in the well in the usual manner, the flow pipe 5 is next set in the well; after which the pump barrel 7 is lowered into the pipe 5 on the drive shaft 4. The motor 3 is now mounted so as to drive the shaft d. By filling the pipe 5 with water or other iluid, it will by-pass the pump barrel 7 and will then ilow into the top of the boot 14 through the grooves 18. The boot will expand under hydrostatic pressure to tightly press against the inside of the pipe 5 so that the boot will neither rotate nor move vertically. Since the boot 14 is tightly secured to the intake tube 13, which is part of the pump barrel 7, the pump barrel itself will be prevented from rotating, and also moving or vibrating vertically.

If it is desired to remove the pump in its barrel without removing the ilow pipe 5, it is only necessary to reverse the pump piston 9, which will force the fluid within the pipe 5 downwardly into the formation. The pump and the barrel 7, together with the collapsed boot 14, can

t Y d now be pulled upwardly to the surface by means of the and means sealingly .attaching the lower end of the drive shaft 4. boot to said tube.

Having described my invention, I claim: A bottom hole pump retainer for Wells comprising, References'cgged by the Examiner flow ipe inthe well, 5 a purlnp barrel removably mounted in the ow pipe, UNITED STATES PATENTS a pump arranged Within the barrel, 1,514,284 11/ 24 Heeter 166-190 a tube depending from the barrel, said tube being of 1,916,875 7/ 33 Yarbrough 166-106 X less diameter than the barrel, 2,706,450 4/ 5 5 Bodine. a flexible and distendable boot, i@ 2,885,968 5/59 Wagner 166-206 X splines on the outside of the tube adjacecnt the upper f t end thereof, CHARLES E. OCONNELL, Primary Examiner.

clamp means securing the boot to the splined area of the tube, packing means between the upper end of BENJAMIN BENDETT, Examiner. the boot and said How pipe, y 15 f

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