US2890520A

US2890520A - Liner puller

Info

Publication number: US2890520A
Application number: US436384A
Authority: US
Inventors: Erwin C Ford
Original assignee: PIONEER SPECIALTIES Inc
Current assignee: PIONEER SPECIALTIES Inc
Priority date: 1954-06-14
Filing date: 1954-06-14
Publication date: 1959-06-16
Anticipated expiration: 1976-06-16

Description

June 16, 1959 fr W//7 C. Fora INVENTOR.

E. 0. FORD LINER FULLER June 16, 1959 Filed June 14.

2 Sheets-Sheet 2 VIA/AI 452m A T. b

Unite States 2,890,520 Patented June 16, 1959 ice LINER PULLER Erwin 'C. Ford, Houston, Tex., assignor to Pioneer Specialtics, Inc., Houston, Tex., a corporation of Texas Application June 14, 1954, Serial No. 436,384

7 'Claims. ((31. 29--252) This invention relates to new and useful improve ments in a liner puller.

It is an object of this invention to provide a puller for pump liners, and the like, that will pull liners from pumps of various sizes of the type commonly used in petroleum pipe lines, and in the oil fields.

It is another object of the invention to provide a roller for liners, and the like, that may be readily and easily applied to a pump housing and that may be readily and easily adjusted to the housing of a series of various size pumps.

It is still another object of the invention to provide a puller for pump liners, and the like, that may be operated by hydraulic pressure, or by mechanical pressure, or both.

It is still another object of the invention to provide a puller for liners, and the like, having a novel means for selectively applying the device to various sizes of pumps.

It is still another object of the invention to provide a puller for pump liners, and the like, that may be employed without the necessity of removing the pump rod.

With the above and other objects in view, the invention has relation to certain novel features of construction and arrangement of parts more particularly defined in the following specifications and illustrated in the accompanying drawings, wherein:

Figure 1 is a horizontal view, partially in cross section.

Figure 2 is an end view, taken on the line 22 of Figure 1.

Figure 3 is an end view, in cross section, taken on the line 3-3 of Figure 1.

Figure 4 is a horizontal cross sectional view taken on the line 4-4 of Figure 1.

Figure 5 is an end view of the puller head, taken on the line 55 of Figure 4, and

Figure 6 is a cross sectional view of the hydraulic piston taken on the line 6-6 of Figure 4.

Referring now more particularly to the drawings, the numeral 1 designates a pump housing, such as commonly used in pipe lines, and the like, in which a liner 2 is mounted in the usual manner, and which is equipped with the usual "head bolts 3. A cross bar 4, having the removably mounted

feet

5, 5, is adapted to fit on said housing 1. The feet 5 have bolt receiving chambers 6, at one end, and have guide members 7 at the other end. The chambers 6 receive one of the head bolts 2 when the feet are moved into position, and the guides 7 align the bar 4 and the feet 5 and maintain such alignment.

An externally threaded shaft -8 is mounted in and extends through the bar 4. Welded on the shaft 8 is a spacer block 9 adapted to abut against the bar '4 and limit the movement of the axially mounted puller head 10. The head 10 has a series of marginal notches 11, 11 comprising pairs of diametrically opposed notches of the same depth. The notches are arranged in pairs of various depths to accommodate various sizes of pumps. An internally threaded socket 12 is formed in each notch and a pair of

longitudinal arms

13, 13 have one end mounted in said notches of a given pair and secured in position in any suitable manner, such as by the insertion of a bolt 14 through the arms and into the sockets 12.

If desired the connecting ends of the

arms

13, 13 may be downwardly turned, forming an abutting shoulder to fit against said head. The opposing ends of said arms are outwardly turned to abut against the end face of the liner to be pulled. The end of said shaft 8, adjacent said head 10, may be provided with a flattened area to receive the jaws of a wrench when it is desired to turn the shaft 8 manually.

A hydraulic jack is provided to assist in the pulling operation, such as the jack 15, which consists of a housing having an internally threaded insert 23 at one end adapted to receive the externally threaded portion of the head it), which forms a reduced hub. A piston 17 is mounted in the housing 15 and is constantly urged into inactive position by the coil spring 18, theinwardly extended end of the insert 23 acting as a guide for the spring it. A reduced piston 19 is axially mounted through the piston 17 and has an extended arm 25 designed to provide an extended stroke to the piston 19. A suitable flexible conduit, as 20, is connected at one end to the jack housing 15 and a hand operated pump, as 21, may be employed to provide hydraulic pressure to the pistons 17, 19.

When it is desired to pull a liner, or the like, from a pump, the head is removed from the bolts 3 and the feet 5 are positioned on the bar 4 so that the chambers 6 receive diametrically opposed bolts. anchored in place by tightening the nuts which are mounted on the bolts 27, 27 which may be welded to the outside end wall of the

feet

5, 5 or mounted in the

feet

5, 5 in any suitable manner. The guide members 7 restrict the feed 5 against turning on the bar 4 and the

slots

22, 22 in the bar 4 permit a wide range of adjustment for various sizes of pump housings. The mounting of the bolts 27, 27 on one end face of the

feet

5, 5, permit the feet to be mounted on the bar 4v and positioned to extend outwardly therefrom where large sizes of pumps are to be serviced, or extend inwardly as shown in the drawings to permit servicing of small sizes. The shaft 8 will be screwed in the bar 4 until the spacer block 9 abuts against the outer face of the bar 4. The arms l3, 13 are mounted in the proper notches 11, 11 according to the size of the pump being serviced. The pump rod 24 will be withdrawn to the extreme end of its stroke, and as the

arms

13, 13 are inserted into the housing 1, the outwardly turned ends The feet 5 are thereof will pass between the piston rod 24 and the inside wall of the liner 2 and will be brought into contact with the end face of the liner 2, and the shaft 8 then screwed with a counter clockwise rotation until the slack is taken up and the head 10 abuts against the spacer block 9. The

arms

13, 13 are held tightly in place in the head 10 by the bolts 14, so that they will clear the end of the piston rod 24 as they are moved into position. The jack 15 is then mounted on the reduced hub 16 of the head 10, and the pump 21 manipulated to apply hydraulic pressure to the piston 17. When the piston 17 moves forwardly, it applies direct pressure to the shaft 8, forcing the head to move rearwardly, drawing the liner rearwardly with it, and when the piston reaches the end of its stroke it will abut against the inwardly extended end of the insert 23. The liner 2 will have been started out of the pump housing, and the piston 19 will then move against the shaft 8 at a much faster speed than the speed of the piston 17 continuing the movement of the head 10 rearwardly. When the piston 19 reaches the end of its stroke, the jack 15 may be disconnected, and the fluid therein permitted to run back into the pump 21, and the pistons 17, 19 permitted to return to their initial position, and the shaft 8 rotated manually until the head 10 again abuts the spacer block 9 on the shaft 8. The rotation of the shaft 8 will be necessary to back it out the same distance as the liner has moved and the initial movement of the liner may loosen same sufliciently so that the rotation of the shaft 8 may be continued and the liner removed by applying a wrench to the flattened end of the shaft 8. However, if the liner does not readily yield to the manual rotation of the shaft 8, or again becomes hard to move before it is completely removed from the pump, the jack 15 may be again connected to the head 10 and the hydraulic pressure again used to continue the outward movement of the liner 2.

It is customary to pack the liner in the housing with several packings (not shown) which tend to bind the liner in the housing. The action of the puller as above described will draw the liner out of the housing until the respective packings clear the restricted portion of the housing. When the liner is free of the binding action of the packing, it will be loose in the housing and the puller may be removed and the liner entirely and easily withdrawn by hand from the housing. The spacing of the bar 4 from the pump housing by means of the adjustable feet 5, permits the outer end of the liner to extend out of the housing as it is pulled out of the restricted area.

As is obvious the arms 13 may be provided with outwardly turned members on the extended ends thereof to fit and pull valve seats, as well as pump liners, the length of the arms 13 being adjusted in accordance with the respective valve.

When desired, the

slots

22, 22 in the bar 4 may be enlarged in order that the feet 5 may be removed, and the slots in the ends of the bar 4 positioned on the extending bolts 3 to anchor the bar in position on the pump housing, and the pull then effected as hereinabove described.

While the foregoing is considered a preferred form of the invention, it is by way of illustration only, the broad principle of the invention being defined by the appended claims.

What I claim is:

1. In a liner puller, a bar member, a pair of adjustable feet on said member, a shaft adjustable in and extending through said bar having a portion thereof externally threaded, a head loosely mounted on said shaft having a pair of arms mounted thereon, said arms having engaging means on their extended ends for engagement with a liner to be pulled, and means on said head for exerting hydraulic pressure against said shaft moving said head longitudinally with relation to said shaft.

2. In a liner puller, a bar adapted to be mounted on the pump housing, a pair of adjustable feet mounted on said bar, head bolt receiving chambers in said feet, a threaded shaft adjustably mounted in said bar, a puller head loosely mounted on sxid shaft, puller arms having one end anchored to said puller head and the other ends engaged with the end faces of a liner to be pulled and means for exerting pressure against said shaft to move said head longitudinally with relation to said shaft and pulling said liner.

3. In a liner puller, a bar adapted to be mounted on the pump housing, a pair of adjustable feet mounted on said bar, head bolt receiving chambers in said feet, a partially threaded shaft mounted in said bar, a puller head loosely mounted on said shaft, puller arms having one end anchored to said puller head and the other ends engaged with the end faces of a liner to be pulled and means for exerting pressure against said shaft and moving said head longitudinally with relation to said shaft comprising a hydraulic jack mounted on said head having a pair of pistons thereon, said pistons abutting against the extended end of said shaft and means for successively moving said pistons against said shaft moving said head longitudinally with relation to said shaft and pulling said liner.

4. In a liner puller to be mounted on a pump housing, a transverse bar mounted on said housing, a threaded shaft rotatably mounted in said bar and extending into said housing, a head loosely mounted on said shaft, a pair of arms mounted at one end on said head and at the other end abutting against the end face of the liner to be pulled, means detachably mounted on said head for exerting pressure against said shaft and pulling said liner.

5. In a liner puller for removing pump liners, a bar member having means for mounting said member on the extended bolts of the pump housing, said bar member having an internally threaded port extending transversely therethrough, an externally threaded shaft mounted in said port, a puller head loosely mounted on said shaft, puller arms removably mounted on said head, the extended ends of said arms being outwardly turned forming liner engaging fingers, means detachably secured to said head for exerting pressure against said shaft to move said head outwardly with relation to said shaft.

6. In a liner puller for removing pump liners from a pump housing, a bar member having means for mounting said member on the extended bolts of the pump housing, said bar member having an internally threaded port extending transversely therethrough, a puller shaft having an externally threaded area mounted in said port, a spacer block mounted on said shaft at the terminus of said threaded area, a puller head loosely mounted on said shaft on the unthreaded area thereof and movable longitudinally thereon adjacent said spacer block, puller arms removably mounted on said head, the extended ends of said arms being outwardly turned forming liner engaging fingers, means detachably mounted on said head for exerting pressure against said shaft to move said head and arms outwardly with relation to said shaft.

7. In a liner puller for removing pump liners from a pump housing, a bar member having means for mounting said member on the extended bolts of the pump housing, said bar member having an internally threaded port extending transversely therethrough, a puller shaft having an externally threaded area mounted in said port, a spacer block mounted on said shaft at the terminus of said threaded area, a puller head loosely mounted on the unthreaded area of said shaft and movable longitudinally thereon adjacent said spacer block, puller arms removably mounted on said head, the extended ends of References Cited in the file of this patent UNITED STATES PATENTS Ragsdale Aug. 10, 1926 Staser Apr. 8, 1930 Heimbaph et al. June 29, 1937 Hancock Oct. 30, 1951 DHaem Nov. 11, 1952 Lee May 4, 1954 Williams Aug. 16, 1955