US2218496A - Take-off tool for wells - Google Patents

Description

A 011151940. 1 G, pHlLLlpS 2,211`916'` l `TAKE-GFF TOOL FOR WELLS Filed Jan. 1:3, 1959 fiar-3J.. Janna..

QNX

ATTORNEY.

proveniente tak'eloff toolsigo il, l gas and 1" One object 'ff thefihvetionlfis' to rovide .a

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" This inventionzreate i le n'.

atleet any desired timel Another object of the lnyetien lieto proygde a ball-bearing take-01T` tool so constructed as to` retain theweight ofthe string of tubing :upon

said ball-bearings, thereby leaving the thread connectionslfree toturn. H

`Still another object of the invention is to pro-V vide" `a ball-bearing take-off tool operating `through ground joints and oil baths thereby positively eliminating foreign substances from inter"- fering with connecting screw threads.

`The invention will be more readily understood l from a reading ofthe followingspecication and `by reference to the accompanyingdrawing` wherein means for carrying out the invention are disclosed and wherein:

` Figure l is a transverse vertical sectionalfview of a take-off tool constructed inaccordance with thepresent invention.

Figure Zis a horizontal `cross-sectional view taken on the`lines 2-2 of Figure 1. Figure 3` is another horizontal cross-sectional `view taken on the line 3--3 of Figure 1,` and Figure 4 is a transverse vertical sectional view l of a modified form of the invention.

In the drawing,`the numeral I designates an" elongated cylindrical housing having a bore II l screw-threaded at I0 therebelow. Y

` An adapter I3 is secured by thethreads I2and A hollow sleeve I6 having an outwardly errtherein;` The bore II is screw-threaded at its upper end at l I2 while the body II) is recessed to form a shoulder at its lower end and externally is inturn secured to the usualstring of tubing (not shown); j An internal `annular shoulder I4 is provided within thebore I I whereby a reduced bore I is formed in the lower end of said body I0.

.tending "annular collar I1 at its upper end is slidably conned within thelower bore I5 by the adapter I3 and a roller-bearing `race-way `I8 atl l the bottom ofsaid body I Il. `Said race way being retained by an internally threaded cap I3 which is secured tothe body' I0 by the threads I0 and is provided'withan inwardly extending circular flange I9 whichltlange engages the race way.

The sleeve `I 61s internally` threaded to receive the left-hand threads of the upper portion of` a nipple 2|.FA shoulder 22 istormed `on the body of the `nipple, and a right-hand threaded `conparts. revolve with the body I0 due tothe balls 26 and 4 tend to'be tightened during the'take-oi operastructure is disposed' on*` Ahe outside of a string of "peredannular member 3I surrounding the tub--l be `securedfto atool B. l

'- A; packing medium 25 is disposed between the shoulder I `1betweermthe,boreIl and collar II is aground 5 I Land collar Il, whilethe sliding fit 1 To-` prevent-the,l sleeveyfrorn rotating during i operation,A `zisavvill hereinafterA ybe explained, ballbearingsjl are'. provided-in the wall of thev body Il). Vertical grooves 21 are formed in the outer l0 periphery of the sleeve III and one-half of each ball-bearing 2 6 protrudes into this groove, said balls being held in position by screws 28, Thus it will be seen'that the sleeve is capable of vertical movement but is prohibited from rotation b the balls 26 and grooves 21.

Inoperation the tool B, such as a packer or the like'isset at a desired point, and instead of the weight of `the string of tubing resting on the thread connections between the string and tool 20 asis the VVusual practice, the tubing A is supported by the race way I8. Y i

When it is desired to take-oir the packer,` leaving. the same set in the hole, it is only necessary to revolve the member I0 and its cooperating This action will "cause the sleeve I6 to grooves 2T, therebydisengaging the left-hand threads on the portion 20 of the nipple2l.

As the threads are disengaged the sleeve I6 will be forced upwardly, but at no time is the weight ofthe tubing on these threadsl As all other threads are right-hand threads they will tion. The frictional' engagement of the tool B is suflicient to prevent rotation `of that memberv during the take-off operation.

In Figure 4 a slightly modified form of the invention is shown whereinthe race way and other A collar C connects'the string of tubing .and confines a race way 30 between itself and a taing. A second collar D forms a seat for the mem- A memberv 32 is rigidly secured to the tubing A, said member being substituted for the sleeve I4, and having grooves 33 in the outer periphery thereof similar to the grooves 21, `A member 34. contains ballsA 36 and grooves 33. l

The lower portion of the member 34 is externally, right-hand, screwthreaded at 36 Ato receive the upper portion of a connecting collar 31,1vhi1e 65 2,zis,4969 L the lower portion of the collar receives the upper left-hand threads of a tool E.

The tapered member 3| is of suficient outer diameter whereby said member seats upon the upper portion of the tool E.

The operation of the device disclosed in Figure 4 is principally identical to that form shown in Figures l-3 and therefore a description of the same is. deemed unnecessary. y

From theforegoing it may be seen thata tool simple in construction, cheap in manufacture and positive in action may be had. Also, the forms 'disclosed may be used not only with well packers but may be employed in combination withv all oil Manifestly, the construction as shown and described is capable of some modification and suchI modification as may be construed within the scope and meaning of the appended claims is `also considered to be within vthe spirit and intent of the invention. .1 l 4 '-Whatis claimedis: l 1

1.-Aftakeoff tool for wellsincluding in combination with a drill pipe assembly, arcylindrical body, a sleeve constrained vagainst other vthan sliding movement in said body, and provided with a-left-hand female threaded socket, a shouldered rnipple having a pin receivable in said .socket and well comprising a tubular body, a sleeve therein, means for holding said sleeve against other than sliding movement, a box carried by said sleeve having interior left-hand threads, a bearing race carried by the lower end of said body and means 'in' contact with said bearing race, receivable by said sleeve for connection with said special equipment. y Y 4. A tool for depositing a liner in a well includying a tubular body, a sleeve held against other than sliding movement in said body and having aninternal threaded box, means receivable in said box for suspending said liner and means for freely supporting the lower end .of said body` on said latter means preparatoryto releasing said 'tool from said liner.

` JAMES G. PrnLuPs.

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