US1789247A - Release spear - Google Patents

Description

W. J. MILLER RELEASE SPEAR Jan. 13, 1931.

Fild May 13, 1930 M/ 4L. m

Patented Jan. 1931 y VRELEASE srEA'nf .l y application ledMay 13,

This invention relates to a release spear" and it is an' object of the invention to provide adevice of this kind constructed in amanner whereby a packer may be readily applied :and

wherein the structure is Asuch to vassure suf- .icient tension'against the'packer'tohold the sam'e:(irm.lhj jwY Y.

f It is also 'an'obj ect of the invention to provvide a spear ofthis kindv with a packer assoi 1g ciated therewith, thevassemblybeingpsuchto cause the -packer to expand under pulling strain on the spear tof-add an upward kick to lthe fish vand wherein the packer, upon lowering of the' spear, goes back to normal Y to allowl free circulation between 'the spear and pipe to speed 'up'thepump .Y

An additionalv lobject of the'invention is to provide a spear ofthis kind which will pull the 'fish with the pump pressure.V 2o'. The invention consists in the details of construction and lin the combination and arrangement of the several parts Vof my improved automatic release -spear whereby certain important advantages are attained and the device. rendered'simpler, less expensive and otherwise morev convenient and advantageous for use, aswill ybe hereinafter more Vfully set forth.' y

The novel features of my invention'will so hereinafter bedeflnitely claimed. n'

VIn order that my invention may be the better understood, I. will now proceed `to describe the same with reference to ,the accompanying drawings, -wherein L Figure l is aview partly in section and.

partly in elevation illustrating a spear constructed in accordance with an embodiment of my invention, theassociated casing being o fragmentarily shownin section and the'shank under pulling strain;

Figure 2Ais a fragmentary sectional view of the'lower portion of the spear with the parts innormal position; A n

Figure Sis an enlarged sectional view takensubstantially onthe line of Figurel; v

Figure eis a sectional Yview taken substantially on the line of Figure 3; f. Figure 5 is a sectional viewsimilar to Fig- 'shoulder' 9 disposed l circumferentially 1930. semi 119.452,095.-

of fmy invention. 4 4

, Asfdisclose'd in they accompanying drawings, 'l denotes the lower portion of a drill ure'` a further embodiment i stem which has 'threaded therein the upper 55 portion of,V an elongated tubulargvshank 2. Threaded. or l otherwise engaged with the lower portion ofthe v`shank .2V is a tool 3, hereindisclosed, as constituting `aguide member or reamer. lTheyupprer or Vinner 'portion ofv 60 the l guide memberv or reamer' has-its wallV ymaterially reduced-` from without :ink diameter, asat 4, the bottom annular wall or shoul der ixresulting fromt .such reduced portion;

being inwardly'and downwardly inclined.

j VSurrounding the' portion '4f of @the guide member or r'eamer 3 is apackerzjhaving its i lower edge face beveled to have snug or lclose contact with thebeveled or inclined shoulder -5, while'V theA opposite endf face ofthe 70 s packer 6 islbeveledk for close contact withthe beveled edge/face of the, ring member 7 surroundingthefportion .4. v'The upper or inner end ofthis ring member v7 is dened by an inwardly disposed flangeS overlying the 75 Y inner 'or-1, upper end'of the applied'guide membervlor reamer 3.; NormallyV thefpacker isfully expanded with its outer or peripheral face substantially flush with the outer i face of vthe guide member or reamer -3 and with theflangeS ,of the ringrmember 7 spaced upwardly from the guide member yor ream'ervlan'd preferablyin contact withthe aroundthe shank`2 and Awhich lshoulder is, `inthe presentembodimentof ,myjinventiom Y obtained bygre'ducingth'e lowergend portion Yof said shank-2 .for.- a; desired distance lengthwise'thereof.

member-17 ,and having ,"contactjwith said Vmember 7 fromabofvefis .-a'tapered mandrel 10..; The mandrel 1.110 is freely "mounted on the'. shank 2 andgsaidzmandrel coacts from l within with the elongatedgripping arms 11 carriedcybysthe lower'sectlon -12 o fra slip fsleeve S. Y f This lower section 12 is'inthread'- ed engagement,as at 14, with the` upperv sec- .tion 1510i the sleeve S. vBy providing the separate sections 12'a'nd 15 the lower sec-` Surroundingthe shank2 yabove.'the ring e0 Y lon tion 12 together With the gripping arms 11 can be -readily replaced When desired.v

The section 12 can be readily removed after taking ofi" the guide member or reamer Y 3, the packer 6, the ring member 7 and the mandrel 10. Upon removal of the guide member or reamer 3 thepacker 6 maybereplaced: asfrequire'd. i Q- Atthis timeit is to be statedv that the v'paeller 6 preferably constitutes fabric reinforced'V rubber although Othrigifblejlbglilimyi be employed which will assure the requisite outward expansion of the packerfuln-n der the lifting pull or strain imposed upon the guide member or reamer 3.1" Y f The upper section 15 ofthesleeve Sat dia'n'netricallyl opp'osed"points` is Yprovided With the elongatedslots 16,.'thelovverfportion @of each of lwvhi'ch'jbeingl transversely'endel-"18 substantially straight from end to larged, ias at' 17,to,providea n upper shoulend. Thegloiver edge Wall ofthe enlarged 'portion'17o the slot remote romthe'shoulder 18 is disposed downwardly on an incline, as at 19, toward the` opposed edge Wall.

"Tightlyengaged'withthe shank 2 is a key V2001? desiredvdimensions andnof alength to project beyond opposite sides. of `the f shank with each'extended vend* portion being received. Withinva/slotfl. and its yenlarged portion" 17. 4 The bore of thelshank 2l adjacent to the Vkey1v20v is enlarged, 'as at 21, to.- allow Water passage `'around the' appliedjkey`20. 'The .inclined edgewalls 19are for the purpose of automaticallyhplacing each extended portion ofthe keyj20`d`irectly under, ashoulder -1Sy Whenthe ,shrank 2 is vlowered tov permit theannular' shoulder 2 2 off-the shank 21ste contact Withthe .upper end vofthe mandrel to `jar said arm-11..

'rlhisshoulder122 surrounds the shank 2 at a desired pointthereon VYbelovv the-key 20.

mandrel'H from .the gripping `This`shoulder 22`is alsoprovided by reducing in diameter thezshou'lder 2. l

Y -lithftlie spear .underpulling 'strain' the packerjS expands against the inner'vvall of the `.pipe "P and the ring member 7 moves doivnvvardlyuntil thewinterivial flange ,8, there-l of vcontacts with the;` upper 'Y or, innerend of the, 'gudefmembr or? reamer.. ith'f'the i packer 6 soegpanded thepumpifcanbe used for circulation aroundthegish and thus, help liftthe fish With'hydraulicjapressure( By lQWering the.' Spear .the packer 6 ,will return Vto nominal and L allov'vQ `free circulation' between the Spear andppe 'ofish P seas to :speed andere@ pulled' iqu-cklyin iztheypnlling "strain, fthe .sudden packing pif will 'i uid-v an nel@ .embodiments my 'invention Las' i11- long, ,one end aeeof, the packerf.having snug or close contact'ivith the shoulder 5 of themember or reamer y3 While the opposite With the ring member 7 in the same manner fandatashion as previously described with respect to the packer 6.

romm'the'*foregoing description it is thought to be obvious that, an automatic release l Spear Constructed/in accordance with my invention is lparticularly ,Well .adapted for ,use ibyfreason Aoit' the convenience ,and facility with which itmaybe assembled'and operated, and it will 1 alsobe obvious .thatmy invention is'suscep'tible of some changeand modication Without departing `fromV Ythe principles ,and spirit kthereof and orthis reason I do not Wish to ,bezunderstood as limin Qarrying,outl my invention. in'practice ex- 'cept as hereinafter claimed.

j I claim 'l 1. A release spear. of 'the class described' `comprising an 'elo ngatedshank, a kmember engaged with 'theinserting end portion-of the shank, the yWall oflsaid'member,beingreduced from Without providingfalovver,shoul- 4kiting ymyself totheprecise arrangement and I vformation off the several parts, herein shown der, eXpansible packing surrounding said reduced portion of the imember, "a ring mem-A ber surrounding, said reduced 'portion of l the .first named member-,above the packingga mandreljfreely.4 mounted ,upon the shank, for

limiting the f movement of the ring member in a 'direction away from vthe virstnamed lmember, and a slip,sleevesurroundingthe shan'k'an'd having enpansible pipegengaging means, the rmandrelfcoacting Withisaidrexf pansiblepipeengagingmeans." Y v A. .Y 2. rAv'release spear 'ofthe class described comprising' an Aelongated shank, a' member engaged Withlthe insertingrend portion of the r shank, vthe Wall. of said member beingreduced from without providing a lovverfs'ho'udlen-an leX-panslble packing-surrounding 'saldi reduced "portion-,of the member, a ring'. member 'surrounding said reduced .fportionz or'- thei-rst named member above thepacking-a mandrel freely -mounted upomthe-shankfon coaction -.-WithV the ,f ring f member, meansfor f limiting the movement of thel ringnmembergingadierection: .away l"from, :the yiirst named y member, and aslipfleeve surroundngifthehank and having expansible pipe engaging means,.the mandrel coacting IWith. said ex yansible l.pipe engagingffrneansfsaid'ring mem er havingan inwardlyV disposed flange J)for 1 coa-ction :with

the adjacentend ofthe first named member p for limiting the movement of the ring memof the rst named member above the packing, a mandrel mounted upon the shank for co-` action with the ring member, means Jfor limiting the movement of the ring member in a directiony away from the iirstrnamed member, and a slip sleeve surrounding the shank and having expansible pipe engaging means, the mandrel coacting withsaid eX- pansible pipe engaging means, the shoulder of the first named member being inwardly and downwardly inclined, thel adjacent end of the packing having close contact atall times with such shoulder.

4. A release spear of the class described comprising an elongated shank, a member engaged with the inserting end portion'of the shank, the wall of said member being reduced from without providing a lower shoulder, an expansible packing surrounding said reduced portion of the member, a ring member surrounding said reduced portion of the first named member above the packing, a mandrel freely mounted upon the shank for eoaetion i with the ring member, said shank being pro- Vvidedtherearound with a shoulder for contact by the ring member for limiting the movement of the ring member away from the rst named member.

5. A release spear of the class described comprising an elongated shank, a member engaged with the inserting end portion of the s ank the wall of said member being reduced from without providing a lower shoulder, a sleeve havingone end portionA engaged with said reduced portionV of the member, an expansible pack-er surroundingl the sleeve, a ring member surronnding'the sleeve above the packer, a mandrel freely mounted upon the shank for coaction with the ring member, means for limiting' the sleeve, a ring member surroundingthe sleeve above the packer, a mandrel mounted upon,V the shank for coaetion with thering member, means for limiting the movement of the ring member in a direction away from the first named member,and a' slip sleeve surrounding the shank and having expansible pipe engagf ing means, the mandrel coacting with said eX- pansible pipe engaging means, an end porl tion of the sleeve having a rabbet tightly receiving the reduced portion of the member.

7. A release spear comprising an elongated shank, expansible pipe engagingl means carried by the shank,anactuatingrmember for, expanding such means upon pull on theV shank, and an expansible packing mounted upon the shank below the actuating member,

said actuating memberupon pull of the shank y.

expanding the packing.

In testimony whereof I hereunto afIiX my` signature. l

WILLIAM J. MILLER. l f

movement of the ring member in a direction Y away from the first named member, and a slipsleeve surrounding the shank and having eXpansible pipe engaging means, the mandrel coacting with said expansible pipe engaging means.

6. A release spear .of the class described comprising an elongated shank, a member engaged with the inserting end portion of the shank, the wall of said member being reduced from without providing a lower shoulder, a sleeve having one end portion engaged with said reduced portion of the memv ber, an expansible packer surrounding the

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