US1996068A - Hollow trip casing spear - Google Patents

Description

April 1935. F. J. HINDERLITER 1,996,068

HOLLOW TRIP CASING sPEAR 7 Filed March 30, 1952 2 Sheets-Sheet 1 5;. Z Ig j April 2, 1935. F. J. HINDERLITER HOLLOW TRIP CASING SPEAR 2 Sheets-Sheet 2 Filed March 30, 1932 uNITEofS-T E a. drill casing and the likes Patented Apr. 2, 1935 r This invention relates to fishing tools and will be described as embodied in an improved tool adapted for removing cylindrical objects from a deep well such for example as a drill pipe or An object of the present invention isthe ,provision' of tan improved fishing tool of the type above identified which is adapted to be lowered 'into a well and inserted intoa pipe or well casing for lifting the same from the well.v

; Another object is the provision of such a tool including means for locatingand-passing into a I --pipe' or casing to be lifted, and means associated incorporating my invention;

thereof; i

therewith for forming .a seal between the tool and .pipe to facilitate the circulation of pressure 'fluidathrough the pipe. e

A further object is the provision of such a toolincorporating means for causing the automatic gripping of the pipe by the tool and automatic release of the same upon vertical and rotary movement of the tool.

j Other objects andradvantages of this invention will become apparent from the following detailed description with reference to the accompanying drawings .in which:

' Figure 1 is an elevational view of a fishing tool Figure 2,is a'frag'mentary elevation of a part of the tool shown in Figure 1 with portions broken away to more clearly show the construction Figure '3 is a' horizontal section taken on the lineIII-III of Figure 2; 1 a V ;.Figure 4 is a horizontal sectiontaken on the line IV-YIV of Figure 1;.

Figure is a vertical sectional view substantially onthe axis of the tool disclosed in Figure 1 andshowing it about to be inserted in a -pipe or 'thetool inserted in the casing to belifted with the clutchmeans and the sealingmember adjacent the head of the tool engaging the-inner surface of the casing.

The improved fishing tool as herein disclosed comprises a body 3 which is hollow'having a substantially cylindrical bore 4 therein through which water or the like may be forced under pressure to aid in loosening the casing or drill pipe so that it may be more readily lifted;

The body 3 is provided adjacent its upper end with threads 5 which have engagement" with threads 6 on the lower end of a cylindrical supporting element 1 which is also hollow The upper end of the. supporting element 1 is provided with an enlarged bore and internal threads 8 engaging the external threads on the lower end 9 of an actuating pipe ll. v v

The lower end of the body 3 has formed integral therewith a head 12 which has relatively ofthe tool. The lower endfof the head His tapered at 1,4 to facilitate the location of the casing-or pipe ll to be lifted and totfacilitate'the] entrance of the tool into such-a'pipe, Adjacent the upper edge of the headis provided a gasket or annular sealing member [5 preferably formed of rubber or the like to form a seal between thje resents thick walls l3 for encountering various elements j 1 asit isbeinglowered intoa well and to withstand wear an'dstrain while protecting the remainder tool and the'inner surface of thepipe'or casing l'| as shown in Figure 6. Thesealin'g member l5 is interposed between two'metal rihgs IBandI'Q' which may be split'riiogs, as shown in Figures 1 and 4-., in orderthat they may be pressedfinto position. The ring iBis seated upon the shoulder 2! and the ring is engages beneath the shoulder 22 as best illustrated'in Figures 5 an d 6.- 7

Between the upper cylindrical portion of the body 3 and the head l2, the body is provided with an outwardly taperingportionifi, the outer surface of which forms an annular cam 21 which cooperates with the internalrcarnf surface 28 fo n the lower portiongof the clutch or wedgemember 29 for the purpose of expanding the clutch member when it is lowered relative to the body caused by friction engagement ofthe teeth 3| with a pipeor the like l1 'as illu strated iriFigure 6;

The clutch mernber includes a shank portion 32,

having a shoulder 33 on which is seated 'afcoil spring 34.; The upper" edge of the coil spring 34 normallypresses against the lower end'of the supporting velement I and asithus interposedbea tween thej supporting member I andthe'clutc h 'memben; it tends toforce the'clutc'h" member downwardly which downward movement is however restrained by the coaction of the cam surfaces?! and 28, but the clutch member when aided by frictional force from the pipe I'I does become forced downwardly over the cam surface new so I firmly enga ges the inner s'ur face ofv the pip'e ll sufiiciently that the pipe I? may be withdrawn from a deep well in which it may be situated."

In caseiti'sfound ,to be impossible to'lift the casing "or pipe 'I'I after the ChitChEhaS beenfirmly engaged therewith it maybe desirable to with'-' draw thefishing tool from the pipe. For such a purpose'I have provided cooperating means on the body 3 and'on the clutch whereby the clutch may be automatically released-from the casing tive to the clutch. I V v Referring particularlyto' Figures; 1, 2 ;,and 3 of the drawings, the body 3 isprovided yvith bores axially extending bayonet slots 43 in which the pin 42 extends. Thebayonet slots 43 include'offset slots 45 into which the pins may be. rotated.

I! upon proper manipulation of the bodyi rela- 1 I I 5 "memberas above described;

f2 i e, i I a :i,99 Whenithe pins 42 arein the; position shown in Figure 2 lifting of the body causes'the clutch member to be released from the casing I1 and.

permits the fishing tool as .a whole to be with- 5 .drawnjfrom the casing and lifted from'the well. The upper'end or shank of theclutch member has an enlarged portion 5l1on the outer surface of which is fixeda slip ring or band 5210f rela tively hard; metal to resist'wear occasioned by a 10 friction along the surface of ,the'well. Theijring 52 is held from vertical movement relative'to the a clutch member by means of a flat spring 53 formed into a ring and fitted into a groove on the inner surface of the ring. To prevent rotationalmovernent of the slip ring: 52 relative to' therclutch 1' member, locking pins 55 are provided which ,en-'

gage in apertures 51 inthe portions '51 and engage ;;in vertical grooves 56 in the'inner surface 'of the ring- 5 2; V Thisfring'52"is-also{usefu1in causing the g :clutch member to rotate relative to the body'by reason of'frictional engagement of the ring 52 ;with,the sides-of the well when the body is rotated, to facilitate engagement or disengagement {fthepins 42 fromtheside slots 45 in the. clutch I r {.In the operation of my invention the tool isfirst loweredinto a well bya series of pipes I I. As the }tool approaches the casin'g t'obe' lifted as shown in--Figure. the sealingf'member l5-is somewhat expanded. i 'lfhetaperedportion of the head, i2

' 'guides thetool in to the casing l1 and protects the sealing member; ISfrominjury, It also'pro-' Ltects the clutch member from*'damage .asit is' 'loweredthrough the well and into the casingll 5 in themanner shown in Figure '6} ,With the't jol v in-this-position, a slight lifting of; the bodywill 1; cause the clutch member 29 to firmly grip the innersjurface of the casing I! such}. that upon further upward movement of the body, theca'sing'" I1 isdrawn vertically from the well. H In case great difficulty is, encountered inlifting the casing; from the well afterthe tool has been properly set, fluid under pressu'remayi be forced 'downwardly through the hollow body 3; and

" ithroughthe casing into-the bottom of -;,the well to loosen or displace earth that may be crowding .tl ieeasing. The sealing ring [5 disposed adjacent the"head;l2 prevents the escape of fluid'be- I tween-the casing an'd the'tool thereby avoiding loss of pressure. This arrangement makes tl'ie' introduction of water or the like underfp'res's'ure 7 verypra cticalj in loosening. the casing. ji

Some iines it soih ap'penstha't regardless-of thea H amountfo f fluid and pressure applied, itjis imp'os- I sible to remove the "casing from the well and in V 65 :43 into the'position shown in Figure 2'. When in "this position the lifting ofthebody causes the pins 43m, lift'the-clutchmember 29 and prevent j it 'moving'downwardly and expanding by reason of the cam face 21 on:the lower portionof the '70 body. *As the clutch is lifted withzthe' body the i gripping engagement with the inner surface of the casing II becomes released and the tool may be then withdrawn from the well. n Although onlya preferred form of 'thisinvention' has been described herein, it will be'appreciated byv those skilled in the art that, the device herein disclosed is susceptible of various'modifi? cations, and there is no intention to limit the pat- :ent to be granted hereon except as required by V the prior art. l ,7 V

I claim asmy inve'ntionjz 111 In a-too'l of the class describedin combination, a tubular body, a substantiallyflcylindrical clutch member disposed on their-outside of said:

body and adapted for gripping engagement with apipe, said clutch member including teeth on the 1 outer surface of they lower-"'portion', a

shank portion .adjacen upper end of said body; a" slip band'surround ng the uppeeportion of said shank; means forllocking said band'to said shank, said body including a tapered portion]? forming a cam engageable with saidclutch member, to-expandthe same" upon relativeiupward moWen e-nt of said body, and means carried'by said body engageable' directly with the sha'nk of said clutch member 'for automatically*releasing said clutch memberfr'om'a pipe upon upward movemerit of the body;

1clutch member disposed on the'outs'ide of said body and adapted forgripping engagement with I 2. In a tool of the class described in combina (1' tion, a tubular *body, a substantially; cylindrical,

a; pipe, said clutchflmember"including teeth; on the outer surface-of; the lowerportiongand a shank portion adjacent" the-upperend' ;of said body; a slip band'surrounding the upper portion s a5" of said shank, means for locking said'bandto 'said shank, including a'ret'r'actable ring and a radially extending pin carried by the shank, saidbody ineluding aitaperedportionkforming a camengage j able with saidclutch-member to expand theesame upon-relative upward movement of; said body, and means 'on said bodyengageable with the shank of said-clutch member--for automatically i Y releasing said clutch member; from: a pipe upon i upward movement of enemy, saidbody including an enlarged head tapered at the lower "end -toguide said body into a :pipe in a well; r

3. In a'tool of the class described in combina-r Ption, a tubular-body, a substantially cylindrical clutch member isp se on the outsideof'said 5 'body andfadapted for; gripping engagement-with apipe, said clutch member including; teeth on the Icuter, surface -of the lower "portion, "and a shank-portion adjacent the upper end: of said b'odyfa' slip band surroundingthe upperwportion 0f said shank, means forlocking said band 'to said shank against relative .movement therebetween, said body i'ncluding a tapered xportion forming a cam engageable with said clutchlmemb'er toexpand the same upon. relative upward 1 movement of said body, means", on saidib'ody engageable with the shank of said clutch member for automatically releasing said clutch member from-a pipe upon upwardimovementof the body,

said b'ody including an enlarged head taperediat v,the lower endto guide said b dy into a p pe in v a. well, anannular resilien-tysealing member. fixed aid body, adjacent said head, and being of,

larger external'diameter than the head for seal ingly engaging tioned. I I

a pipe in which it may be posi- J. VH INDERLI'I'ERLQ

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