US1051501A - Well-casing hanger. - Google Patents

Description

mvENTol w. M. KEUR. WELL GASING HANGER. APPLICATION I'I-LED OCT. 8, 193.2. l

PatentedfJn. 28, 191,3.

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T@ SAMUEL EtLLEN GUIBERSON, JR., OF COALINGA, CALEFORN.

WELL-CASNG HANGER.

Specification of Letters Patent.

application med october s, i912. senat no. 724,587.

M. Knott, a residing at Coalinga, in the county of Fresno and State ifo 'boring apparatus,

proved hanger tor different thicknesses tor use -side collars 8 secured to said lugs. fhanger-bars 7 extend upward a distance,

ot' California, have invented certain new and useful improvements in lNell-Casing Hang ers, of which the following is a specification.

My invention relates, in general, to welland, in particular7 to hangers for suspending the casing-pipe, and lowering it as the hole is made by the drilling tools.

My invention consists in the novel iniwellcasings, which shall hereinafter, together with its objects and use, fully describe by reference to the `aocompanying drawings in which- 1 is a perspective view, broken, of well-cas1ng hanger. Fig. 2 1s Fig. 3 is a Figure my improved a section of the clarnp-blockplan ot the same.

1 is the casing-pipe, pended with its upper the well.

2 is a clamp of that i'orni known in the artJ as-a spider. It comprises a block with a central downwardly tapered hole, and a set or series of toothed dogs 3 termed slips. The hole in the spider-block is suticiently large for casing-pipes of largest diameter, and the sets of slips are made of witli different sized pipes, The engagement ot' the spider with the casing-pipe is eli'ected in the usual manner, namely by fitting the spider-block over the pipe and dropping the slips in an.-

here shown as susend exposed above lnular series into the tapering hole ot the toothed faces of the spider block, with the rlhe casing-pipe may slips against the pipe. thus be firmly gripped about and upon its plain surface at any poi tl below and inde.-

pendent of the couplingcollar Il on its upblock 2 is iorm'ed wrth er end. ,The spider side lugs 5. Overthese lugs are freely litted the slotted lower ends 6 of hanger-bars 7, said ends being held on the lugs by o utl'lthe say, in practice, about thirty-live feet., and their upper ends are fitted vit-h across head 9-upon which is the link 10 which is' engaged by the link 1 1 in the baseof the casing-block 12. y

13 indicates the drilling cable or llne which goes down into-fthe casing pipe vand drilling` tools carries the drilling tools on its lower end.' 1l are satety-cliains hooked at their up 'er ends over the collar 4f and adjustably linled at their lower ends through eye bolts 15. in the spider-block. These insure against any possible relative slipping of the spider and. block. Sufficient is now illustrated to understand my improved hanger. More illustration is therefore unnecessary and would merely confuse. Those skilled in th-e art will know that the casing-block 12 is suspended bv lines which lead up over pulleys in thve crown block of the derrick and thence down to the calf-wheel or drum, by the proper manipulation of which the easingpipe is lowered as the hole is made. Also thatI the drilling cable or line passes up over the crow-n block pulley and down to the bull- 'heel drum which provides for paying out and controlling saidline, and that said line is further equipped with the usual temperscrew, a device which adjustably clamps the line at successive points and provides for its descent in lsuccessive stages, and finally. that said temper-screw l isenga-ged and operated by the usual walking beam by which the successive lift and drop of the drilling tools are e' usual parts of a drillingl outfit, and as 'htrve stated are not necessary to be shown for a clear understanding of my improvement.

In well drilling the casing-:pipe is suspended by means which provide for; its periodic lowering as the hole is made by the which are suspended and op erated by the drilling line 13 passing dowr through the casing-pipe l. means for suspending the casing pipe 1s. by a device termed in the art. an elevator This invariably han lected. All these site.

The customary the pipe by engage-- 'rarement aan. es, tais.

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mentunder its coupling collar 4.' Such engagement is found in practice to entail the following drsadvantageous result lt so holds'said collar,

section ot' casing-pipe is screwed down into that when the succecding the collar, said collar will not give or turn on its pipe toniake a surer and tighter joint The collar is seldom initially .so titted to its pipe that, under the increased leverage o screwing in the. nextpipe section, it will n ot turn down tighter. This eXtra turning is of advantage in insuring a tight joint. But, it will be seen, any clamping device such as elevator which directly engages thef ,ros

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collar and thereby holds it from further turning down is not good. IThis difficulty is obviated by the .employment of a clamp which .does not engage the collar, but directly engages the pipe below the collar,I thereby leaving' the collar free to make its additional turn or turns. Such a clamping device is found Ain the spider Q, as I have shown. But. this is not the whole problem. Any suspending device for the casing'pipe must be one which will permit at some point a relative movement between said device and the pipe. The pipe is apt to sticl; iu the hole from time to time, so that. it has to besuccessively lit'tedand lowered a little. If it finds a sticking point somewhat more obdurate than usual `so that it comes to a. dead'stop when being lowered either in its` regulart'eed or during an attempt to workl it down by lifting and dropping', it is obvious that when brought to such stop, the eiilect upon thehanging parts` the weight ot' which is considerable,1 will be to impose upon'them a compression strain which `they are not arranged to bear, and the colisequence Iis that they will slack up or buckle7 and the casing block will turn over. fith the usual device or "elevator, above menioned, as a clamping device under,the col- Iliar, this diliculty is met by the fact that )said elevator itselt` .simply slips down on the pipe and thus compensates for the lost motion. But with a rigidly-clamping device, such 'as the spider which my invention contemplates using, there can be no slippage between it Mand the pipe7 Jand such slippage must be found elsewhere. Accordingly, I provide for thisby the slotted ends G ot the hanger-bars T which are slidably connected with the spider block Q. These slots are of a length suflicient to enable the operator to ibody, said clamp having 'rigidly clamp Arigidly clamp the block see in ample time that the casing is stuck in l the hole and that the slotted hanger-bars 7 are still slipping down, and to stop them by proper use of the controlling mechanism. In brief, I am thus enabled to use ,a clamp which is independent of the collar on the casing-pipe, and still provide for the necessaryrelative slippage of parts, and herein lies my invention.

I claim l. A well-casing hanger comprising a clamp rigidly engaging the casing-pipe body; hanger-bars and a sliding connection between said bars and clamp.

2. A well-casing hanger comprising a clamp` rigidly engaging the casing-pipe side-lugs: and hanger-bars having slotted lower en'ds slidably engaging the side lugs of the clamp.I

'3. A well-casing hanger 'comprising a clamp consisting ofla block provided with a downwardly tapering hole to surround the casing-pipe, and dogs vitted'in said hole to `the block to the pipe: hangerbars and a sliding connection between said bars and the block ofthe clamp.

4. A well-casing `hanger lcomprising a clamp consisting' of a block provided with a downwardly tapering hole to surround Athe casing-pipe, a'nd dogs fitted in said hole to i to the pipe, said block having side'lugs; having slotted lower ends slidably engaging the side-lugs of the block.. i

In testimony whereof I have signed my name to this specification in the presence ot two subscribing witnesses.

VILLIAM M. KECK. VitneSSes:

M. MANXING CLARK.' H. R. Cnozn-zn.

and hanger-bars

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