US1780699A - Grab for drill rods and the like - Google Patents

Description

Nov. 4,' 1930. H. E. BROWN il? ',Z, Z

. 2 Sheets-Sheet l amocmo'b.

V l I anew m3 o H. E'. BROWN GRAB FOR DRILL RODS AND THE LIKE Nov. 4, 1930.'

Filed May 3, 1929 2 She'etS-Sheet 2 Juventa Snor/nap, Y

* STATES eFFICE* v Y :5 .be used inl connection'with rods of dierent opposed f depressions?) `for the purpose-of 55 i i5 I'Od fromafvvellQ/ fl2c Afu'rther Objectis tojso constructacircular 4emi-trolling head 10 fromjwhich projects@ 7 0 f :25 ing 'of reduced thickness where thefstrains counterbore While the other end bears against 7,5

' 40 Figure l` is acentral longitudinal lsection fwhichare t' othedlasshownatlS. The slips 120. *l

'^ 145 Figure LLis a'section on line t-4, Figure l. head '10-so asltoflimit 'itsmovementgunder 95 APatataNa.aigre 1,780,699j

EL BBOWNQoFWoHITA, KANSAS, AssIenon 'roninnnfi H. NninsoisLoFTUiisr, c f y oKLAHoiviA f sintieron nerr-.L nonsnnnrrrnnixnQ zappiicationiea' May.3,'192`9, j seri'ai m1360324". Ihis iriventionrelatesto a grab designed aofthelto'olv. the saineljbeilg providedl 1-bh p rimarily for lifting broken rodsfrom the in# vend ,Wi'th a. threadedl stud 21for?engagement side ofvVell-tiibing,1one of the objects vofthe with a rod use df'formanipulating the tool. invention beingto provide a grab Whichfcan The upper-portion "of the head'is formed with diameters,` the `grab"beingsimple and co-mr lightening theV toolk Without-` reducingrlithe pactin `Construction and constituting means' strength thereof. A llongitudinal bore 4 is for Vfirmly gripping the krod With which it is :extended into the tool from the lovverzend 1-Placedin engagment= f 'l thereofeandhasa Icomi'terbore"xextendini' '1,10 Another lObjectis to'piovideay structure therefrom into the reduced portion ofthe 50 of this characterhavillgmeansforengaging head:l The' Wall ofthe bore 4 iscut away/to acollar orljoint on a rod if'conveniently loprovide 'diametricaflly opposed Aslots Giland :ated,jtherebjy. to providel a supplemental rod belowthese slots-the Wall o-f-thef.bore iscon'-v engagingy means to 'insure elevationof the tractedand formed with opposed'groofves y,7o

i t theinner Wallsof Which converge downiva'r'df. Another object i to provide, atool ofthis 1y and terminate at a throatS from Whichathe character vhawifn'g means .combined therewith Wallis iiaredtothe endof' the head asshown whereby a brokenvrodcan be kengagedand at 9;V i :jj i i Slidablymounted Within the bore isfa guide casing forthe gra-bas .tolprop'erlyoreL stem 11 vlocated Within the oo unterbor'e 5.11.A sist strains Without unduly adding 'tothe size 'coiled'springlZ'is-located'inthe 'counterbore `or Weight of the'tool52the :Wall ofthe strucand 'extends laround-the stemllyone endof turebeing thickened Where necessary and bethis `spring ,bearing against the end of F'the Y A s the controlling head 10,'Vv Anl opening '13 is f'Withvthetzforegoingand other `objects in'v lextended diametrically'through the headlO view which Will appear 1 as .the description "fandl is "adapted, when saidvhead isthIllSUUP- proceeds, they invention-resides in the com- ".jwardly within thef head1', to:register fvvith- .f i; 30 bination and arrangement of parts and in the openings ltrformedJ-inthe Wallof theicounf (810 detailsof'construf'zi-,ion hereinafterrdescribed terbcre.;A When thus located,a pinP can1be yandclaimed,it'being understood that changes insertedthrough the aligning openings-1,3

inthefprecise embodiment 'ofthe' invention and 14jfortlie purposeiof holding thefhead herein disclosed may -be ymade Within'- the` l0`elevated andthe spring 12 undercompres-v scope-ofivhat isirclainied'iivithoiit departing -"sion.""- Y V85j fromthespirit ofthe invention. 'f i 2 yExtending kthrough theh'ead 10 yis abolt l @Inf the accompanying drawings the 'pref v15 to the endsiof which are connected arms f ferred'formlof the inventionhas been shown. 1 6 that extend upwardly froml substantially i y'Wledgelshaped slipsjlf', thevinner. faces of arey thel least. I

7; In'the said"'drawings,r

" arefseatedlinithe -opposed lgrooves 7. .f .1f A

j through the'tc o' l.` f f' v c l"-"FigureE2 is a frontelevation of the latch Stopv'studs-'lQfare extendedfrom thejw'all 'portion thereof.-` f' 'a f offtheborefl atdiametrically.opposedpoints FigureB is a section `on line 3 -35 Figure 2. and projectr into the path of vthe 'controlling Fig', 5 is a sec'tionioiithe line 5f-5,Figure l. the action of' thespring l2. n, f- Y V Figurefisa section on linejf-ByFigure 2. guide socketl or1tube12() isv Xtendedfonr c Figure 7 is a section 'onfline-7-r71, Figurel. jv the lower portion of the head 1- as s hovvn'andiV Referring to the-figures by characters ofV hasits Wall out away to provide a relatively p50 Arreference.l Adesignatesfthe elongatedhead,broad; slot V21 forthe receptionofj-.theonef100- piece latch 22. The side walls of this slot converge adjacent the lower ends thereof where bearing shoulders 23 are provided from which said walls extend downwardly as at 24 and merge into the walls of laterally extending recesses 25 that-V are preferably rounded 'as shown. As shown in Figure 3, the port- ions 21 and 24 of the walls of the slot are disposed in Vsubstantially parallel planes. This slot 21 is'adapted to receive the latch 22 preferably of the construction illustrated,the said latchincluding a transversely bowed head 26 the width of which is slightly less than the distance between the inner edges of the walls23. A tongue-27 is extended downwardly from the headand has laterally lextending 'rounded projections 28 adapted to fitv within the recesses 25. Y The lower end of the tongue is adapted to bear against the bottom wall 29 of theslo't which thus forms a bearing for the latch. It will benoted that the bottom edge Yofthe tongue is inclined downwardlyV and inwardly whereas the edge'29vforming the wall ofthe slot is inclined upwardly and outwardly. A lap is thus provided which prevents the latch from shifting: outwardly from its proper engagementV with the socket ortube 20. A spring 30 is secured to the outer face l.of the socket 20 and bears against a fiat .surface 37' on the head 26 so as to hold the head normally pressed inwardly as shown.

The upper end of the latch 22 is concaved from side'to side to provideanend recessr 38 and the wall ofthis recess is beveled to an edge39.l 'l As shown in 'Figure 1the'wall ofthe socket .20 Ycan be thickened where the slot 21 is'provided, thus to properly strengthenthe socket and hold it against-"collapsing when subjectedfto severe strain.

Formed within the socket member 20 above VYa point diametrically opposite the slot 21Vis b la' longitudinal `slot40 inwhich is slidably mounted thefhead- 41 vof a stud 42 which is 'located withinthe upper portion of anA arcuate'blockor slip 43 which is inserted upward- `ly into the. socket member 20A and thereafter held in place by screwing the stud 42 thereinto. The slip extends back ofthe latch 22 y and `has its 'lower end beveled as -shown at 44 so as to constitute'deflecting means. The

Y.inner surfaceof the slip or block is curved `inwardly and terminates in a shoulder-45- The side'edges of the blockV are formed with angular recesses 46 and these sideslare adapt- Vled to .be -slidably'engaged by the sides of the latch 22 when said latch is pressed toward the slip 48. The upper walls of the recesses 46 normally overhang the sides of theupper ends of the latch. 1 i Y Y K `In using this tool ffor: the purpose of ex`V tractingbroken rods the controlling head 10 Vfis released so as-to rest upon the'lug or stud V19V and the tool is then loweredrinto the well If a collar or coupling is located at the upper end of the broken rod the same will be received within the socket 20 and as the latch 22 moves downwardly past vthe collar or coupling, it will be forced outwardly against the action of spring 30 until the upper end of the latch passes below the collar or coupling. At that time it will be forced back spring 30 so as to assume a 1 position astride the rod and under the coltween the slips 17 as the tool isvlowered.

The frictional engagement of the rod with the slips will force them upwardly and apart against the action ofthe sring 12. As lthe rod is brought to position well Within the bore 4 the tool is pulled upwardly. This will result inthe teeth gripping opposed portions vof the rod,'the-spring 12 forcing the slips downwardly upon the converging walls of the slots or grooves V7 so that the rod will be tightly held and will be drawn upwardly with the tool.v A Importance is attachedV to the fact that the slips can be held upby inserting a nail, pin or the like through the openings 18 and 14 sothat the slips will' be out of the way when the latch 22'is used for pulling a rod *as` hereinbefore described. f

. As this latch is subjected to severe strains vduring the pulling operation it is essential that the same be provided with the greatest possible bearing surface. F or this reason the arrangement of .the bearing shoulders 24, the Vearmg projections 28 and the Vrecesses 25 as well as the lapping-bearings29vare of considerable importance.

By mounting the spring- 30 as shown it vcanbe swung laterallyV to Vallow a latch to be readily placedrin or removed fromposition.

of the socket 20 isk gradually thickened as shown particularly inFigures 1, 3 and 6 so that when an engagedrod or the likefis thrust transversely against the'slip .43 because of its engagement'with the latch 272., there will be no dangerY of Asaid wall' bending under the strains to whichit-hasV been subjected. At other points where the socket is Anot subjected to excessive strains thewall vis of minimum thickness.' f

By mounting thespring 30 ona pivot as shownit ispossible to swing the same away from the opening in which thela-tch 22 is seated so that a new/latch -can easily be placed lin position when desired. Y

. hile'l .this devicel is particularly useful Y `Adjacent and: above the latch 27 the wall for removing'broken and parted rods, it can also be used advantageously for lgrabbing and lifting tools, sections, or parts ofwell casings, etc.

The upper and lower. portions of the deviceare used in one tool and lowered simul.r taneously so that should it be impossible Vto grab the broken or separated part withA oneY portion of the tool the other portionwould be in position for engaging and lifting'v the part.

What I claim and desire to secure by LettersvPatent is: 1. A tool of the class described,'including a socket member having a lateralopening and superposed bearing portions,and1.a latch mounted for pivotal movement in said opening having superposed bearing portions cooperative with the bearingV portions on the socket to provide a multiple support for the latch and a load carried by the latch.

2. A tool of the class described, including a socket member having a lateral opening and superposed upwardly facing bearing portions inv` said opening, a latch pivotally mounted in said opening having downwardly facing bearing. portions cooperative with thek bearing portions on the sockettoprovide a multiple support for the latch when subjected to downward pressure offa load supported f by the latch, and means yieldingly urging the slot therein, said slot having oppositely ex v ltendingsockets, a latch movably supported within the slot and having laterally eXtendlatch into the socket.

A tool of the classdescribed including, a head, spring controlled gripping slipsmovl ably mounted therein, a tubular socket member v depending `from the lhead, there being a ing projections rmounted for movement with- .in the socket, the bottom wall of the slot conv stituting a bearing-for the lower endvof the latch, there beingshoulders extending later-l l I i allyfrom the side portions of the latch and shoulders at the sides of the slot, all of the shoulders cooperating to 'support'thelatch when subjected to the weight of-a load, and

yieldingkmeans `for `holding thezlatch norv mally pressed inwardly relative tothe socket member.

4.'In atool of the class-*described the combination with a head, of v a socket member projecting therefrom and having a slot in the wall thereof, a spring'controlled means in the slotk pivotally connected toand normally projecting into the socket member, and a slip within the socket member, said slip .and

spring controlled meansV cooperating to grip and supporty a rod'insertableintothe socket member.

5. In a tool of the` class described a socket,V member yhaving aV slot, a slip-removably mounted in the socket member and having a shoulder, alatch mounted to swing within the slot, and yieldingmeans for holding the v port an inserted rod.

' 1 6. The combination with a socket member having a slot, ofa slip'removably mounted in the socket member and having a shoulder, there being opposed recesses inthe edge portions of the slip, a latch pivotally mounted in the slot, and yielding means for'holding the klatch normally pressed against the recessed'edges of the slip, therebyv to hold the slip within the socket member, said latch and slip cooperating to engage and support a rod inserted therebetween. 1

'7.7'A tool of the class described including a socket member having a'slot, of a latch pivotally mounted in said slot having a recess within the socket member',;a latchfin the slot, 4 p

rounded projections uponl the latchy seated within said'recesses in the socket thereby to provide a hinged connection between the latch and socket, said latch and projectionsy being movable bodily into the slot and recesses respectively, a springsecured to the socket vand :bearing'against"the latch to hold the" freeendv thereof normally pressed 'intov the socket, and a lslip in the socket for engagement bythe latch. 1 l

In'testimony that I claim the foregoing as kmy own, I have hereto aflixed my signature.

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