US2318980A

US2318980A - Cylinder liner puller

Info

Publication number: US2318980A
Application number: US393735A
Authority: US
Inventors: White Clarence
Original assignee: OIL WELL Manufacturing CORP
Current assignee: OIL WELL Manufacturing CORP
Priority date: 1941-05-16
Filing date: 1941-05-16
Publication date: 1943-05-11
Anticipated expiration: 1960-05-11

Description

May ll, 1943. C. WHITE CYLINDE LINER FULLER Filed May 16, 1941 R QN OM .m R @w mw m f on WW d w 5 M .H %\w a a. am N WM w @v E u a M l m \\1 /110 QN 1 Q ww WG.. m El EEE LMA/000 R om M, 3 @n Nv@ Q A .6% o@ .NRW @u w ww Patented May 11, 1943 CYLINDER LINER PULLER Clarence White, Walnut Park, Calif., assignor to Gil Well Manufacturing Corporation, Los Angeles, Calif., a corporation of California Application May 16, 1941, Serial No. 393,735'

(Cl. Ztl-88.2)

Claims.

This invention relates to devices for pulling an insert member from a bore. The device is especially adapted for pulling various pieces of equipment from oil well pump tubing, such as valves and liners, and for pulling the liner from the bore of a slush pump. It is in connection with the latter use that the device is illustrated in the drawing. It should be understood, however, that it is not intended that the scope of the invention be limited tc use in connection with slush pumps, or for use solely in pulling liners from pumps, this embodiment being chosen for the purposes of illustration and description.

This invention is an improvement upon the pulling devices disclosed in the patent to Clarence White and Oliver B. Graham, No. 2,039,371, and in the application for patent of Clarence White and Oliver B. Graham, filed December l5, 1939, Serial No. 309,374,

It is one object of the invention to shorten the puller and thereby reduce its weight.

It is another object of the invention to provide a puller adaptable 'for use with cylinders of different lengths and bore diameters.

It is still another object of the invention to provide a pullervwhich shall be readily assembled for the pulling operation.

It is another object of the invention to provide a puller capable of extracting an insert member with less manipulation of the parts of the puller than has been heretofore characteristic thereof.

These and other objects and features of the invention will be apparent from a perusal of the following descriptive speciiication in connection with the accompanying drawing `and of the appended claims.

In the drawing, which is for illustrative purposes only:

Fig. 1 is a longitudinal, fragmentary section through a cylinder, such as the cylinder of a slush pump, and illustrates the manner inwhich the device embodying the features of this invention is installed for the operation of pulling a liner from a pump cylinder;

Fig. 2 is `an enlarged cross section of the pulling shown in position ready to pull the liner from a pump cylinder. A pump body is formed with `a cylindrical bore I2 and an outer, slightly larger, opening I5 coaxial with the bore I2. An insert liner I3 in the form of a sleeve provides a pump bore I4 within which reciprocates a pump piston (not shown). The liner i3 is inserted in and removed from the bore I2 through the opening I5.

Although the pulling device is illustrated in an operable Vposition in a horizontal bore for illustrative purposes, theV device is equally adapted for use with vertical bores. The invention comprises generally a grasping mechanism 2l) carried by a puller bolt or stem 2| and a means for imparting longitudinal movement to the bolt 2|, which means is generally indicated on the drawing by the numeral 23. y

The several parts of the grasping mechanism and their operative relationship will be described.

A grip expanding nut 24 having a frusto-'conical rim surface I6 is threaded upon thepuller bolt 2| with its small end Il facing toward the opening I5. The larger end 26 is disposed adjacent the inner end of the puller b olt 2| and is diametrally slotted at 21 to receive a cotter pin 28 which engages the bolt 2| and prevents the nut 24 from turning thereon. A plurality of ,segmental expanding grips29 are circumferentially spaced about the nutv 21|. Each of these grips constitutes the segment of a ring, and each two grips are separated `by a radially-disposed gap 30. A bore surface 3| of each grip 29 is conically shaped to fit the conical rim surface I6 of the nut 24. Each of the grips 29 is also machined to present a segmental cylindrical rim surface 32 dimensioned to slidably fit within the bore`l4 of the liner I3, a segmental cylindrical rim surface 33 of larger radius' than that of the surface 32, and a segmental cylindrical rim surface'Sd of Vsmaller radius than that of the surface 32. f

Between the cylindrical rim surface 33 at the inner end of 1eachof the grips 29 and the cylindrical surface 32 is an annular shoulder 35 adapted to engage the inner end of the liner I3. Each cylindrical surface 33 isof the same, or preferably of somewhat smaller, radius than the outsidevrim surface of the liner I3 when the grips Vare expanded sufficiently to bring their cylindrical surfaces 32 in contact with the bore surface I4` of the liner I3, enabling the grips 29, when in fully expanded position, tojbe withdrawn through the bore of the pump body and yet have a solid and extendedcontactual surface engage-= cylindrical segmental surfaces 34 andthe bore I4 of the liner I3. The web 4| at its inner end is integrally connected with an annular flange 42 which extends radially inwardly Yfrom the web 4| and projects into and has annular sliding engagement with the side walls of the grooves' 31. The length of the web 4| is such that the position of the flange 42 within the side walls of the grooves 31 permits an endwise thrust contact between the faces 39 and 49. y

A collar 48 is rigidly secured in fixed position upon the bolt 2| at such a position therealong that it isspaced a short distance from a hub portion 49 of the nut 38. This collar 48 affords a shoulder for positively stopping movement of the nut 38 along the bolt 2|. Otherwise, as the nut 38 is rotated with respect to the bolt 2| in a manner to cause it to move rightward to the end of the threaded portion of the bolt 2| the threads of the nut might become jammed on the Unthreaded portion of the bolt 2| and be difficult to dislodge for a subsequent movement to the left on the bolt 2|.

The radial distance between bore faces 53 of the outer or rightward end portions of the segmental grips 29 and the bolt 2| is less than the depth of that portion of the flange 42 which overlaps the outer side walls 31a of the grooves 31 of the segmental grips 29 when the latter are in operative position of engagement with the liner I3; The radial distance between the bore faces 53 and bolt 2| is somewhat greater than the depth of the shoulder 35. It follows from these relationships that, when the nut 38 is withdrawn longitudinally of the bolt 2| a suicient distance from the nut 24 to enable the bore faces 53 of the segments 29 to be moved radially into contact with the bolt 2|, the entire grasping structure 2|) can be inserted within the bore |4, but that the several segments will be held in assembled relationship with respect to the bolt 2| and

nuts

24 and 38 by reason of the engagement of the ange 42 with the slots 31 of the segmental grips 29. To disassemble the segments 29, the cotter pin 28 is removed, the nut 24 is unscrewed the outer section of the wrench 43 engages a slot 54 formed in the cylindrical wall of the inner section 44. 'Ihe slot 54 has an elongated portion 55 extending longitudinally of the section 44 and closed at its two ends. The slot 54 is also characterized by a plurality of recesses 59 communicating with the elongated portion 55 and disposed on that side of the portion 55 of the slot toward which the torque of the outer wrench section is directed when the wrench is rotated in the direction requisite for expanding the segmental grips 29. As shown in the drawing, this direction is clockwise when viewed from the right-hand side of the drawing. The enl gagement of the pin 5| with the slot 54 determines the extent and character of the relative movement of the two sections of the wrench both longitudinally and angularly.

When the pin 5| is at the outer end of the slot 54, the handles 5|! are disposed adjacent the opening I5 in a position convenient for manual operation of the wrench 43. If the device is used for pulling liners from cylinders which are shorter than the cylinder II shown in the drawing, the pin 5| is seated in an inner one of the recesses 5G so that the handles 59 will assume a position relative to the outer pump body opening corresponding to that shown in Fig. 1.

This invention includes in combination with the grasping mechanism 29, the means 23 for moving the bolt 2| longitudinally of the cylinder bore |4 for movement of the grasping mechanism 20 to remove the liner I3 from the bore |2. This means 23 comprises a pressure or thrust yoke 51 and a nut 58 threaded upon the stem 2|. The yoke 51 comprises a cross arm 59 and two strut members or pressure posts B0.

The cross arm 59 is provided with an outwardly projecting hub portion 6| having an outermost substantially fiat pressure end surface 62. In ene side of the cross arm 59 and extending through the outwardly extending hub 6I thereof is a laterally facing slot 63, an inner wall 64 of which is arcuate in transverse section, as shown from the bolt 2 I, and the nut 38 is moved leftwise of the bolt 2| at least to a point at which its face 39 is flush with the left end of the bolt 2|. The segments 29 can then be moved radially inwardly to clear the inner edge 52 of the flange 42.

The grip adjusting nut 38 is turned by means of a cylindrical socket wrench 43. The wrench 43 has two telescopically joined sections, an inner section 44, and an outeru section 45. The inner end of the inner section 441s formedrwith longi tudinally projecting jaws 46 adapted to engage at its outer end upon the inner end of the outer section 45. A pin 5| projecting radially VVfl' in Fig. 4. The slot 63 is adapted to receive the stem 2| in the manner shown in Figs. l and 4, the cross arm 59 being thereby made free for lateral movement away from the stem 2| in one direction.

The cross arm 59 is formed adjacent each of its ends with a slot 65 which extends through the cross arm from its outer to its inner face, the slot being elongated longitudinally of the cross arm. The cross arm 59 is also formed on the inwardly directed face of each of its end portions with a longitudinally extending groove or guideway 59.

Each of the strut members 99 is disposed between one of the end portions of the cross arm 59 and the pump body Il. It is formed with a recess E1 extending from an inner end 68 of the strut member almost to the outer end face 69 thereof. The strut member or post 50 is thus in the form of a hollow rectangular prism open at its inner end and closed at its upper end. The recess 51 serves the double purpose of lightening and cheapening the lcost of manufacture of the post and providingfor the accommodation of a cylinder head stud 13. A centrally directed side wall 1I of the post 99 is cut away at its inner end to provide an' opening 12, which makes it possible to move the post 55 toward thestem 2| With its inner end 68 adjacent or in sliding contact with an outer surface 13 of the pump body II. from a position in which the wall 1`|` is beyond the cylinder head stud 18 to a position in which it is between the cylinder head stud and the stem 2|.

The outer end of the post 68 is formed with a tongue 14 extending outwardly from the face 89.

and adapted to slidably t within the groove or guideway E8.

A bolt 15 is threadedly seated in the outer end of the post 58 and extends through the slot G somewhat beyond the cross arm 59. By means of the bolt and a nut 18 and washer 11 on its outer end, the post 68 is securable in any desired position of xed relationship to the cross arm 59 within the range of travel of the bolt 15 longitudinally of the slot 85. The inner end surfaces 18 and the outer end surfaces 69 of the posts 88 are in planes perpendicular to the stent 2| and are suiciently extended that when the cross arm 53 is pressed perpendicularly toward the cylinder body Ii, each post 69 is maintained in perpendicular relationship both to the outer surface 13 of the pump body II and to the cross arm 59, forming with the cross arm 59 a rigidly assembled yoke 51 equivalent under such conditions to a yoke of which the cross arm and post are integrally connected, like the yoke 15 of Patent No. 2,039,371.

The nut 58, threadedly mounted on the stem 2| and adapted to pressurally engage the pressure surface 52 when the nut is threaded downwardly on the stem, is the means 23 by which an Voutwardly directed longitudinal force is imparted to the grasping mechanism 28. Lateral movement of the cross arm 59 relative to the stem, when such a longitudinal force is being imparted to the grasping mechanism 28, is provided to obviate slippage of the cross arm while the liner I3 is being pulled from the bore. In the form shown in the drawing, this means 23 comprises an inwardly facing annular recess 19 which accommodates a roller bearing interposed between the stem 2i and the nut 58, and an annular collar 8| secured to the nut 55 at the inner end of the recess 19. The collar 8| annularly embraces the outer end of the hub 8| of the cross arm 59. By means of the collar Si, the nut 58 and the stem 2| are held in axial alignment with the cross head 59 when the puller is in the assembled operative position shown in Fig. 1.

The nut 58 is formed with four tubular radial extensions 83. A handle bar (not shown) is inserted into a hollow socket 84 oi any one Vof, these tubular extensions 83, as may be convenient, to turn the nut 58 upon the stem 2|.

The operation of extracting a liner I3 from the bore I2 of a pump body I I will be described. The stem 2|, with the grasping mechanism 20 and wrench 43 assembled upon its inner end and the nut 58 in position upon its outer end, is inserted in the liner bore I4 until the shoulders 35 are inside of the inner end 38 of the liner I3. When the stern 2| is thus being inserted in the bore I4, the grip adjusting nut 38 is backed ofi' on the stem 2| sufficiently to enable the rim surfaces 33 of the segmental grips 29 to slide within the bore I4. The pin 5| is then placed in that one of the recesses 56 which will dispose the handles 58 just outside of the opening I5 in the pump body. As shown in Fig. 1 of the drawing, the pump bore |2 is of that length to require that the pin 5I be placed in the outermost of the bore recesses 56. By means of the handle 59, the wrench 43 is then turned in a clockwise direction as viewed from the right, causing the grip adjusting nut 38 to expand the segmental grips 29 until their rim surfaces 32 contact the bore surface I4 of the liner I3, placing the annular shoulders 35 in position to engage the inner end 38 of the liner I3 when the stem 2| is later moved outwardly.

The nut 58 is then turned on the stem 2| to a position which will allow for the disposition of the yoke 51 between the pump body and the nuts 58. With the nuts 16 loosened and the bolts 15 disposed adjacent the outer ends of the slots 65, the yoke 51 is placed in position with the walls of the slot 63 embracing the stem 2 I. The posts 68 are then moved centrally toward the stem 2|, the centrally directed walls 1I clearing the cylinder head studs 10 by virtue of the openings 12 at the inner ends of these walls 1I. When the posts 60 have been placed in the proper position with respect to the opening I 5 in the pump body, the nuts 16 are tightened. The posts 88 are now held in rigid perpendicular relationship to the cross arm 59.

The nut 58 is now turned inwardly of the stem 2|, the collar 8| rst telescopically engaging the hub 6I, and the assembled yoke 51 next being pressed tightly` against the surface 13 of the pump body, with the result that the stem 2| is pulled longitudinally outwardly of the liner bore I4 until the shoulders 35 engage the inner endr of the liner. Further rotation of the nut 58 slides the liner I3 outwardly from the bore I2.

When the outer section of the wrench 43 approaches the inner face of the cross arm 59, the wrench is shortened by turning its outer section 45 slightly counter-clockwise, moving the pin 5| into the elongated portion 55 of the slot 54. The wrench section 45 is then moved inwardly with respect to the wrench section 44 opposite anotherv recess 58 and turned clockwise, permitting the nut 58 to be again rotated until' the outer end of the liner I3 comes into contact with the cross arm 59. At this juncture the liner I3 has usually been suiciently dislodged from the bore I2 to permit the completion of its removal from the pump body by means other than the pulling mechanism. If, however, this proves impossible, the nut 58 may be turned outwardly of the stem 2|, the posts 89 replaced by other longer posts, and theA nut 58 turned inwardly of the stem 2| to complete the removal of the liner I3.

. It will be observed that the contractible wrench 43 makes it possible to dispose the wrench handles 58 initially at a position for convenient access and at the same time obviates the need for long posts on the yoke 51, whether those posts be integrally formed with the cross arm of theyoke or separably secured thereto. It will also be observed that the contractible wrench permits the initial disposition of the handles 58 in the same relative position with respect to the pump body when the puller is used with diiierent pump cylinders having bores of diiTerent lengths.

It will also be observed that the feature of the invention by which the posts 6|) are separably secured to the cross arm 59 both makes it possible to substitute longer posts during the later stage of the pulling operation, should such substitution be required, and renders the yoke 51 adaptable to cylinder lbody openings I5 of diier ent diameters and to diierent spacings of the cylinder head studs 10. The openings 12 make it possible to assemble the posts in position with respect to the cross arm 59 and the pump body by lateral movement of the posts centrally toward the stem 2|, obviating the need either for disassembling the stem 2| and nut 58 from the cross arm 59 or moving the nut and cross arm outwardly so that the` inner ends of the posts mayclear the outer ends of the cylinderhead studs 1,8'.

Although there has been herein described. in.

connection with the drawing only one embodiment of the invention, it will be understood that the invention may have other embodiments, all of which come within the scope of the appended claims.

I claim as my invention:

l. In a puller for pulling a cylinder insert `member from a, cylinder, the combination of: a

stem adapted to be extended inwardly of the bore of said cylinder; an expansible device on the inner end of said stem adapted when expanded to engage an inwardly directed face of said insert member; an expander for said device including a nut threaded on said stem adapted when rotated in one direction to expand said device; an elongated, two-section, longitudinally extensible socket wrench for said nut rotatably mounted on said stern and extending from said nut outwardly of said bore, the two sections of said wrench being telescopically joined; and means associated with said stern for moving it longitudinally outwardly of said bore, including a thrust yoke extending outwardly from the outer end of said cylinder and spanning said bore and means for applying a thrust force to said yoke and a pulling force to said stem.

2. In a puller for pulling a cylinder. insert l member from a cylinder, the combination. of:` a stem adapted to be extended inwardly of the bore of said cylinder; an expansible device on the inner end of said stern adapted when ex-V panded to engage an inwardly directed face of l said insert member; an expander for said device including a nut threaded on said stem adapted when rotated in one direction to expand said device; an elongated, two-section, longitudinally extensible socket wrench for said nut rotatably mounted on said stem and extending from said nut outwardly of said bore, the two sections of said wrench being telescopically joined; a pin element and a slot element mating therewith upon said two sections respectively, the slot element of which comprises an elongated portion closed at each of its ends and diSDOSed lngitudinally of the wrench and further comprises laterally oi-set detent recesses disposed in communication with said elongated portion and along that side of said elongated portion toward which the torque between said sections is directed when the wrench is rotated in said one direction; and means associated with said stem for moving it longitudinally outwardly of said bore, including a thrust yoke extending outwardly from the outer end of said cylinder and spanning said bore and means for applying a thrust force to said yoke and a pulling force to said stem.

3. In a puller for pulling cylinder insert members from cylinders of diierent lengths, the combination of: a stem adapted to be extended inwardly from the bore of said cylinder; an expansible device on the inner end of said stem adapted when expanded to engage an inwardly directed face of an insert member; an expander for said device including a nut threaded on said stem adapted when rotated in one direction to expand said device; an elongated, two-section, longitudinally extensible socket wrench for said nut rotatably mounted on said stem and extending from said nut outwardly of said bore, the two sections of said wrench being telescopically joined and said wrench when fully extended being suciently long to dispose the outer section of said wrench adjacent the outer end surface of the longest pump cylinder with which the puller is designed to be used; and means associated with said stem for moving it longitudinally outwardly of said bore, including a thrust yoke extending outwardly from the outer end of said cylinder and spanning said bore and means for applying a thrust force to said yoke and a pulling force to said stem.

4. In a puller for pulling a cylinder insert member from a cylinder, the combination of: a stem adapted to be extended inwardly of the bore of said cylinder; an expansible device on the inner end of said stem adapted when expanded to engage an inwardly directed face of an insert member; an expander for said device in cluding a nut threaded on said stem adapted when rotated in one direction to expand said device; an elongated, two-section, longitudinally extensible socket wrench for said nut rotatably mounted on said stem and extending from said nut outwardly of said bore, the two sections o1" said wrench being telescopically joined in a manner to transmit a torque to said nut in said direction in any relative longitudinal position of said two sections; a cross arm extending across said bore and formed for lateral engagement with said stem; separable strut members disposed between the end of said cylinder and the ends of said cross arm, respectively; and a nut threaded on said stem beyond said cross arm for pressing said strut members against said cylinder end and applying a tensile stress to said stem.

5. In a puller for pulling a cylinder insert member from a cylinder, the combination of: a stem adapted to be extended into the bore of said cylinder; an expansible device on the inner end of said stem and adapted when expanded to engage an inwardly directed face of said insert member; an expander for said device, including an operating element movable in one direction relative to said stem to expand said device; an elongated, two-section, longitudinally extensible actuating member mounted on said stem and movable relative thereto to move said operating element in said one direction, said actuating member extending from said operating member outwardly from said bore, the two sections of said actuating member being telescopically joined; and means associated with said stem for moving it longitudinally outwardly through said bore, including a thrust yoke extending outwardly from the outer end of said cylinder and spanning said bore, and including means for applying a thrust force to said yoke and a pulling force to said stem.

CLARENCE WHITE.