US1704057A - Oil-well slip and method of actuating same - Google Patents

Description

March 5, 1929. K, P, NE L 1,704,057

OIL WELL SLIP AND METHOD OF ACTUATING SAME Filed Dec, 28, 1927 I/VVEATZYR. AHRL P #51455.

i/i/iw Patented Mar. 5, 1929.

STAT

FFICE.

KARL P. NEILSEN, F LONG BEACH, CALIFORNIA, ASSIGNOR OF NINETY-IFIVE PER CENT TO A. E. SEDGWICK, OF LOS ANGELES, CALIFORNIA.

OIL-WELL SLIP AND METHOD OF ACTUATINGSAME.

Application filed December 28, 1927. Serial No. 243,028.

This invention relates to slips and a method oi: actuating same, the tlips being operated to control the movement of the casing, tubing, rods, and the like in'the well. It is desirable that these slips be released and engaged qulckly to prevent accidents, and to facilitatethe speed of thework. My slips are operated by the driller or another operator, who is stag tioned immediately adjacent the well, and actuates the slips by a foot treadle or the like.

An object of my invention is to provide slips of the character stated, which are released or engaged with a-Very short vertlcal movement.

Another. feature of my invention resides in the fact that it may be assembled around the casing, tubing, or the like, without having to pass the head and slips over the top of the pipe or tubing, which latter action is cumbersome and slow.

Another feature of my invention s the positioning of the operating spider inside of the collar, which makes the slips operate easier and over a small distance.

Uther objects, advantages, and features of invention may appear in the" accompanying drawings the subjoined detailed descriptions, and the appended claims.

In the drawing: p i

Fig. 1, is a side elevation of my slipcontrol with parts broken away to show the interior construction.

Fig. 2, is a plan view of my control.

Fig. 3', is a plan view of one of'the slips.

Fig. &, is a side elevation of the same.

Referring more particularly to the drawing- My slip control 1, is mounted on top of the y \casing 2, and may either rest on the top of the casing, extend around the outside of the same, or inside of the casing as desired. The slip control consists of a head 3, which isformed in tWo halves45, said halves being suitably secured together by such means as bolts, 6-6,

or the like, which bolts extend through the flanges 78,. extending from the halves 1-5 respectively. H

' As shown in Fig. 1, the casingrests agamst a shoulder 9, in the head 3, although as previously stated the head may be mounted 1n di-fier'ent ways, that is, the casing may extend on the outside, or the bottom of the head may be flat and rest on the top of the casing.

The tubing, rods, pipes, and the like 10, ex-

tends downwardly through the head onto the casing as will be readily understood. The head 3, is preferably held in position on the casing by means of chains 11-12, or the like, which chains are looped around nipples 131 l-, extending from the casing, the other end of the chain being secured in eyes 15-16,

' usual in this type of construction.

A split spider 18, is connected to each of the slips 17, by chain links 19, or the like, and the spider has outwardly extending fingers 20, which extend through slots 21, in a ring 22; rising from the head 3, a foot treadle 23 is formed with arcuate arms which extend spiderand the slips, which makes for easier action and more efiec'tive control.

As shown in Fig. 1, as the slips 17, are lifted they are also moved outwardly a sufiicient dis- I tance to entirely clear the pipe, tubing or the like; The slips 17, are each provided with a seat 26, approximately midway between the top and bottom thereof, and the lower edges 3 of the slips are tapered as at 27, the purpose of which will be further. described.

A ring seat 28, is formed in the head 3,,upon which the seat 26, .is adapted to rest, both seats 26, and 27, being tapered so as to force the slips inwardly against the tubing.

' From the ringseat 28, a wall 29, rises to an offset 30, from which ofi'set the wall 30.,

rises. The purpose of thisis to accommodate the upper section of the slip when said slips are in elevated position.

As shown in Fig. 1, when the slip is elevated the tapered seat 26, rests on the edge of the tapered surface 27,.which distance is relatively short, and about the same height as the slots 21 in the wall 22, which means that a short movement of the spider 18, will move the slips upwardly and outwardly into inoperative position.

Having described my invention, 1 claim:

1. An oil well slip comprising a split head adapted to be assembled about a casing, a split spider positioned within the head, a p urality of slips in the head and adapted to engage a pipe and the like, and links connecting the spider and slips, a treadle and lit means connecting said treadle and spider whereby the spideris elevated to actuate the gage a pipe and the like, and links connecting the spider and slips, a treadle and means connecting said treadle and spider, whereby the spider is elevated to actuate the slips, a tapered ring seat in the head, a tapered seat on each of the slips adapted to. rest on the tapered ring seat, the lower edge of the slip being beveled to rest on the ring seat when the slips are in elevated position.

t. An oil well slip comprising a split headv adapted to be assembled about a casing, a

split spider, a ring rising from the head Within which the spider is "ositioned, fingerson the spider said ring aving slots therein through which the fingers extend," slips in said head, links connecting the spider and slips, and'a foot treadle connected to said spider, a tapered ring seat in the head, a tapered seat on each of the slips adapted to rest on the tapered .ring seat, the lower edge of the slip being beveled to rest on the ring on the inclined rin the'ring seat in the head, said wall being- .aboutthe same height as the distance from seat when the slips are in elevated position.

5. An oil well slip comprising a split head adapted to be assembled about a casing, a split spider, a ring rising from the head within which the spider is positioned, fingers onthe spideiysaid ring having slots therein,

through which the fingers extend, slips in said head, links connecting the spider and slips, and 'a foot treadle connected to said.

spider, nipples extending from the casing, eyes formed on the head, and chains adapted to extend from the eyes and around the nipples, whereby the headis held in position.

6. An oil well slip comprising a split head,

adapted to be assembled about a casing, a ring rising from the head, a split spider mounted within the ring, fingers extending from the spider, said ring having slots therein, through which the fingers extend, a treadle connected to said fingers, whereby the spider is elevated, slips mounted in the head, and means connecting the spidefiand slips, an inclined ring seat in the head, and an inclined seat on each of the slips adapted to rest; on the. inclined ring 'scat, a wall rising above the rin seat in the head, said wall being about the same height as the distance from the inclined seat to the bottom of the slip.

7. An oil well slip comprising a split head, adapted tobe assembled about a casing, a ring rising from the head, a split spider mounted'within the ring, fingers extending from the spider, said ring having slots therein, through which the fingers extend, a treadle connected to said fingers, whereby the spider is elevated, slips mounted in the head,

and means connecting the spider and slips, an inclined ring seat in the head, and an inclined seat on each of the slips adapted to rest 0 seat, a wall rising above the inclined seat to the bottom of'the slip, a tapered lower edg .on the slip adapted to rest on'the ringjseatin the elevated position of the slips, and means to secure said head to the casing.

,In testimony whereof, I aflix my signature.

' KARL P. 'NnrLsEN;

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