US1640847A - Multiple sucker-rod socket - Google Patents

Description

Au'g. 30, 1927.

' A. H. NEILSON MULTIPLE sUcKER ROD SOCKET 5 Sheets-Sheet 1 Filed Aug. 31, 1925 A TTORNEY Aug. 30, 1927.

A. H. NEU-SON MULTIPLBSUCKER ROD SOCKET Aug. 30,1927. 1,640,847 A. H. NEILSON MULTIFLE SUCKER ROD SOCKET Filed Aug. 3l, 1925 5 Sheets-Sheet 5 .ff/Q. 12.

Patented Aug. 30, 1927.

PATENT oFFlcE.

ALBERT H. NnILsoN, or TULSA. OKLAHOMA.

MULTIPLE'SUCKER-ROD SOCKET.

Applicationv led August 31, 1925. Serial No. 53,510.

My invention relates to sucker rod sockets andv constitutes an improvement over they sockets disclosed in my prior Letters Patent of the United States, No. 1,382,602 of June 21, 1921, and No. 1,433,146 of October 24, 1922.

As explainedin my prior patents, a tool of this kind is employedv for the removal of broken sucker rods from a'well andthat, as the break may occur in either the rod section or at the box joint, a multiple gripping surface must be provided to accommodate the tool to the diameter of the rod at the point of severance. This diameter may be that of the rod proper. as where the break is in the rod section, of a mushroomed rod, as where the break is in the rod section and -subjected to hammering, of the box pin when rod sections have become disconnected, or of the box itself, when the break in the .rod is adjacent the upper end of the box.

In my earliest- Letters Patent I disclosed a single set ofl slips,having atapered gripping surface graduated to receive eithery the 5 box or rod, but found this construction not v altogether satisfactory because of the required length of the slips. Y

In'my second Letters Patent 1'; disclosed a reversible set of slips having a gripping surface at one end adapted for receiving,

the rod, and agripping surface at the opposite ends for receiving the box. While this construction has been generally satisfactory,`

it is objectionable in that, it is not always possible to determine beforehand just which end should be presented for the work, and it sometimes becomes necessary to remove the tool and reverse thek slips.

It is the principal object ofthe present invention to provide a tool combiningwthe advantages of both of my prior construe tions, in that it affords the substantially continuous gripping surface for thebox or rod found in the first pat-ent, withouttherk excessive length of that construction, Aand also ali'ords the relatively independentl box and rod gripping sections of the second i patent, without the necessity there present for reversal of the ltool for box or rod engagement.

ln accomplishingthese and otherobjects of the invention I have provided improved detailsof structure, the preferred forms; of.

'primary .or cage slips.

which are illustrated' in the accompanying drawings, wherein j Fig. 1 is a perspective' `View yof my imf proved socket about to be applied to a broken sucker rod.

Fig. 2 is an enlarged, longitudinal section of the socket, the parts lbeing in normal posi; tion.

Fig. 3 is a similar view showing the parts?,

as` they appear when engaging a brokenl sucker rod.

Fig. 4 is a similar view showing theparts as they appear when engaging a sucker rod box. f

Fig. 5- is a detail, perspective view of the slip cage.

Fig. 6 is a transverse section on the line 66,'Fig. 5.

Fig. 7 is a det-ail, perspective view ofthev cage, with the secondary slips removed tol Y better illustrate the throat jaws.

Fig. 8 isa detail, perspective view of one ofthe secondary slips.

Fig. 9 is an enlarged, longitudinal section ofa modified form of socket. I

Fig. 10 is a detail, perspective viewyof tllie modified form of cage and secondary s ips. l v

Fig. 11 `is a transverse section on the linenl 11-11, Figio.

Fig. 12 is a detail, perspective view of' one of the 'secondary slips.- Fig. 13 is a similar viewv of vone of theL l,Referringcmore in ings z-y l. 1 designates a well hole; 2 the casing; 3;

detail -to the draw.-

the tubing and 4 a sucker rod-all of or-Y dinary construction, the sucker Vrod being formed in sections, each section having a head 5 (Fig.` 4) and pin V6 at one end and a box'7q(Fi`g. 3) for receiving the pin of.y an adjacent section at the other end.

As wells in which vmy socket-fis adapted:y

for vuse range from a few hundred to several thousand feet in depth, it 1s necessary to4 employ la number'of sections' of sucker rod, and it vnot rinfrequently happens 'that the rods break, dueto some defect in matey rial or unusual strain, or become separated at a joint. It then .becomes necessary-to remove the retained upper sections ofthe rodl and then fish for the lower portion with. a.

VYillustrated in. F ig. 1.

tool capable of first finding the rod and then gripping it so that the lower portion may be removed. If the break isin the body of the rod and the broken end has not been hammered, a cross section of the diameter of the rod is presented to the gripping tool. If the end of the rod has been inushroomed by hammering larger diameter is presented to the tool, and if the break is at the joint or the severance due to disconnectionV of the box and pin,l then a still larger diameter is presented for the gripping tool.

This condition 'requires that the tool be graduated in order that it may adapt itself to Whichever condition is encountered, it beingvimpossible to foretell the condition because of the depth of the rod in the well.

The socket which l have designed to meet these conditions consists of a tubular barrel 8 having an interiorly threaded upper end 9 whereby it is attached to a sleeve 10 having an interior bore or bearing'll of substantial diameter.

' Extending through the bore ll is a bolt l2 'having a hexagonal boss i3 at its upper end provided with a curved lower surface bearing` in a concave seat v14 at the top of the sleeve 10 and provided witha screw shank 15 at its lower end.

'sucker rod joint and whereby the socket may be suspended from a sucker rod, as

YThe barrel 8 is only of slightly less diameter than the tube 3 within which itk works, and Vis provided at its lower end with a bevel face 18 so that the barrel may move freely in the tube, but when lowered to the broken rod, may iind the rod irrespective of whether the rod is standing straight or lying against the tube, and the rodbe directed to the interior of the barrel. The barrel 8V is of substantial thickness at its lower end but e3:-

i` pands gradually for about'six inches to form a vdownwardly constricted bore 19 therein.

Slidably mounted within the bore 19 isa cage/20,` comprising longitudinally split head 21y formingindividual slip members 22 preferably three in number, havingarms 28 at their upper ends connected at their ends opposite the slip members by aring` 2 4. he cagexis of such diameter' as totit snugly within the barrel with the slip kmeinber's-compressed, the lower edges 25 of the slip members beingv bevelled to form .sub-v stantially a continuation of the bevelled edge' 1,8 of the barrel 8, so that when the socket is lowered over af broken sucker rod, `the latter will be directed to the interior ofthe cage. .v i c The cage 21 has an outer surface tapered oppositely to the bore 19 of the barrel 8, so that it will fit the tapered bore snugly when in normal position therein,and so that the slip members may be expanded under tension ot' the aiins 29, or pressure from the rod, as will presently be described, when l 2T of substantially less dian'iete'r than 1 the.

socket 26 and within Ywhich a'mushro'omed rod may be received and gripped, the throat also tapering toward a restrictednpper end, as in the case of the socket 26.

rlhe lsocket 26 and the throat 27 are ribbed to form gripping surfaces, the ribs being down-.cut to form ratchet faces` whichV may be lowered over a rod, pin or box, but which will tend to grip the same when thesocket is lifted, the gripping face on the throat being extendedV a short distance up 'along the arms 23 of the cage to provide a more extended gripping surface.` i

Located within the cage are secondary slips 29, also preferably three in number, and each having a longitudinal groove 30 in its outer face 'seating corresponding arm 23, the arms 23 being bevelled to form a downwardly-constri-cted, skeletonfbore, and the bases of the grooves 30 being reversely tapered to permit the slipsto expand when` moved upwardly within the cage. rlhe inner facesv of the slips are tapered to form' an upwardly-constricted bore, and are provided with down-cut teeth corresponding to those of the primary socket 26 and vthroat 27, the dimensions of the throat 27 and secondary slip bore 31 being 'such as to provide a continuous,graduated bore when theV parts are in normal iliiosition, there 'being an offset between the bore of the' throat and that ot the primar7 socket,1for the r`reason that the primary socket isintended to take overa sucker rod, pin or box, whereas' the throat Suspended Vfrom `the ring 24 b v a flange 32 is a Vj'a'liinger 38, the lowerend of which terminates adjacent the topfof 'thesecondary slip socket, and the upper end of which pro-A jects above the flange to forni ay seat 34.

Seating on and rising fromv the scat within the barrel' 8 is a Ycoil spring 35', andv interposed betweenv the upper end of the spring andthe lower end of the castellated nut 16 is washer 36 forming a stop against which the spring` is compressed whenY the plunger 33Mis moved upward-ly, either from e cage proper or from' the 'secondary'.slip

socket, as will presently beY described. M s

and secondary socket are V,intended to take over a straight orinushroomed rod.'

no y

iso

the cage.

37 designates' drain holes in the barrel preferably"adjacentits upper end.

The bolt and sleeve connection at the top ofv the` socket affords aV swivel which will permit the socket. and suspended portion of the sucker rod to turn and prevent twisting land possibly. further breakage during the pulling of the rod.

In usingtlie device and first assuming that the rod is broken at the joint, or' that the joint has become separated so that the part exposed to the fishing tool is of the thickness of the box or pin. the upper end ofthe broken rod is first removed from the tubeand. then the socket lety down by means of a Sucker rod. Reaching the box or pin the bevelled end of the socket directs `the same into thebarrel and into the primary socket QG'fOrmed by the slips that are integral with lVhen the pin or box contacts with the teeth 26Yit slides over the teeth for a distance until the constriction in the socketI bars the pin or box, when the cage is held while the barrel moves over it, the tapered contact of the barrel and cage permitting the cage, and' particularly7 the slips 22, to expandy to further' seat the pin or box, the sliding movement of the barrel on the cage beingv cushioned by the spring 35 which is compressed between the washer 36 and the plunger seat 34 as the barrel movesdownwardly, the plunger in turn being held by the ring 24 of the cage. The springhaving reached the limit ofits compression, the pin or box isforcedinto vthe'cage slips and when the socket is lifted'the' teeth hold to the pin or box and as the Constricted barrel is lifted along the cage the bevelled' fa-ce of the barrel and cage tend to compress the slips against the pin or boxl and tightly grip the same so that the rod `is lifted out of the well with the socket.

Assuming next that the break is a clean one in a rod section, then the socket, being lowered as before described, passes over theV end of the rodv until constriction of the secondary slips causes them to engage the rod, and the slips are pushed upwardly and expanded because of their tapered conta-ct with the cage arms to provide a better gripy on the rod when travel ofthe socket is reversed.

In this case the spring is again compressed between the washer 36 and the plunger seat 34, but pressure of the plunger is against the upper ends of the secondary slips, t-he- 'ca-ge moving downwardly withthe barrel.

upper end presents a gripping surface too small to libe engagedby the primary1 slips landV too larger fr the secondary slips, it is gripped in thethroat 27, this operationbeingthe same as described inf connection with the pin or box break.

In Figs. 9 to 13 inclusive I have shown a modified form of cage wherein the secondary` slips are unconfined except bythe compression spring. In-this form the cage 3.7 is ofV solid construction, split longitudinally to rforni the individual slips 38 and the upper confining portions 39, the slips being held together by a. split spring band et() seatinuf; in an ai'inular groove eljat the center or thevcage. Theslips 38 have the upwardly-eonstrieted tooth bore ofthe preferredforn'i lbut thelthroat ofthe cage is not adapted Ior grippinol but merely for the passage of a rod therethrough. The upper slips e2 have tapered seat on the solid upper face oit' the cage and have an upwardly-constrieted toothed bore, as in the preferred form, andare held in assembled relation by a split spring band t3 seating inthe annulargroove del. Operation of the modified form of socket is substantially similar to that of the preferred form, any slight difference being readily apparent from observation of the dra ings, and the operationwill, therefore, not be specifically described. y

' lVhat I claim and desire to secure by Letters Patent is l. In a socket of the character described,

an interiorly-taperedy barrel, an expansible set of exteriorly-tapered primary slips within the barrel,v having interiorly tap-ered ex-` tensions, and an'expansible set of externallytapered, secondary slipswithiirthe extensionsofy the primary slips.

A 2. In a. socket of the character described, a primary of relatively expansible slips movable longitudinally within the barrel, and a secondary set of relatively expansible slips movable longitudinally within the primary set of slips, the primary slips having downwardly restrictive relation with the barrel and theV secondary slips having corresponding relation withtlie primary slips toV effect selective gripping relation of the slips with contained stationary objects when the socket is raised along the objects following a preliminary grippingcontact of the slips with the objects.

3. Ina socket of the cl'iaratter described, an interiorly-tapered barrel, an expansible set of exteriorly tapered primary slips within the barrel, having Yinteriorly tapered extensions, an expansible set of externallytapered. seeondaryslips within the extensions of the primary slips, and means yieldingly resisting v longitudinal movement ofi either set of Islip-s.

a. In a socket of the character described, an interiorly-tapered barrel, an expansible set of exteriorly tapered primary slips with- `tensions, an expr in the barrel, having interiorly taperedextensions, an expansible set of externallytapered secondary slips within the extensions of the primary slips, a plunger operable under thrust from either set of slips, and a spring yieldingly restraining thrust. movement of the plunger.

5. lnv a socket oij' the character described, an vinterierly-tapered barrel, an expansible set of exteriorly-tapered prin'iary slips within the barrel, having interiorly tapered exihle set of exteriorlytaperc secondary )lips within the extensions or the primary slips, a plunger suspended from the said extensions and engageable by lsaid secondary slips, and a spring confined within the barrel in restraining relation to the plunger.

`6. ln a socket or' the character described, a primary set of slips con'iprising separate gripping jaws and extensions on 4said jaws connected remote -from the jaws to form a cage and permit the jaws to spread, and a secondary set or slips confined within the cage.

7. In a socket oit the character described,

a primary set of slips ccmprhiing separate primary set of slips comprising separate gripping jaws and extensions on said jaws connected remote t'rom the jaws to Vform a cage and permit the jaws to spread, and a secondary set ot slips confined within the cage and slidable longitudinally on said extensions, the extensions being tapered to per-- mit the slips to spread.

9. ln a socket of the character described, a primary set of slips, having tapered, jaw- :taced inner surfaces iorniing an upwardlyconstricted channel having tapered, jawraced extensions connected remote from the slipsto t n a cage, a secondary set or slips conlined w in the cage and having tapered, jaw-laced inner sui-tacos :forming vupwardly-constricted channel., l graduated relative to the channel in the primary set of slips.

10. ln a socket oit the character described, a primary set of slips, jaw-'faced innell surlaces forming an uj vardly-constricted enannel andhaving tapered, j aw-ifaced connected remote from the slips toriorm a cage, secondary set or slips eonlined within the cage and having tapered, jaw-faced inner surfaces forming an `upwardly-constricted channel, graduated relative to the extensionsV channel in the primary set of slips, the meeting faces of said extensions and said secondary slips being tapered oppositely to permit the slips to expand when moved longitudinally within the cage. Y l

11. In a socket of the character described,

a Pl'ml'y Seil Of slips having tapered, jawf fa-ced inner surfaces forming an upwardlyconstricted channel and having tapered, jawtaced inner extensions connected remote from the slips to form a cage, a secondary set of slips conncd within the cageand having tapered, jaw-raced inner surfaces forming an upwaidlyeconstrioted channel, graduated relative to thechannel in the primary'set :of slips, and single means tor resisting longitudinal movement of eitherset oi' slips.-` n

i2. A. socket oi' the character described, con'iprising a barrel having atapered inner wall, a cage slidable in the barrel comprising a longitudinally split head and arms on the head members connected to form a cage, the head members having tapered and toothed inner walls, slips slidable in the cage, the

slips and cage arms being` reversel'y tapered to contract the slips or permit them vto expand, the slips having tapered and toothed inner walls, a plunger' in said cage engageable by the cage or by the. slips, a head for the barrel, and a cushionk interposed between the plunger and said head. f

13. In a socket of the character described, a barrel, a cage slidable within the barrel, comprising a set ot primary slips, a-set of secondary slipsslidable within the cage, a v5 plunger slidable within the cage operable by the cage or by the secondary slips, a head on said barrel, and a cushion between the `head and plunger. I

14. In a socket of the character described, a barrel, a cage kslidable within the barrel, comprising a set ofprimary slips, a Vset of secondary slips slidable within the cage, a plunger slidable within the cage having a flange overlying the top of the cage, a head on the barrel, and a coil spring seatingY on vsaid flange about the plunger and retained by said head. l Y

15. In a socket of the character described, a barrel, a head in the barrel, bolt rotatable in the head having a head seated on the barrel head and provided with a pin, and having a nut engaging the other end of theQ lbarrel head, a cage in the barrel comprising a primary set olf slips, a'secondary set oat slips within the cage, a plunger in the cago operable by either the canje or the secoi'idary slips, and aspringl interposed between the plunger and said nut.. i

In testimony whereoii'l ai'lixmy signature.

ALBERT n; Nnirison.

lll!

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