US1752822A - Slip for rotary tables and spiders for handling pipe - Google Patents

Description

R. v. ui-m'ls SLIP FOR ROTARY TABLES AND SPIDERS FOR HANDLING- Filed July 2, 1928 r a 4 M. r w

fiber/K04 5% 1 V Patented Apr, 1, 1930 .PATEN'U OFFICE,

RICHARD V. UHRIG, OF LOS AEGELES, CALIFORNIA SLIP FOR ROTARY TA- BLES SPIDERS FOR HAZNIDIZJIN'G- PIPE Application filed July 2,

This invention has to do with a slip for use in a rotary table, or the like, and it is a primary object of the invention to provide a slip that is easily handled and which cannot Y fall into the well.

- In the drilling of wells with the rotary method, it is common to use slips in connection with rotary tables, or the like, for the purpose of holding or engaging parts such as tubing, casings, etc. These slips are segniental wedge members and, in accordance with the usual construction, there are three or more in each set. The slips are usually handled separately or individually, and it is common to provide each slip with a handle either in the form of a U-shaped metal bale or in=the form of a strap of flexible cable, or the like.

In practice, difiicult is sometimes ex erienced in handling a slip as the ordinary orm of handle just mentioned does not enable an operator to engage the slip conveniently with more than one hand. Further, serious trouble is often caused by a slip being accidentally released to fall through the rotary table and into the well, it being necessary in such case to fish the slip out of the well, which operation is usually very diflicult.

It is an object of my present invention toprovide a slip having a handle whereby it can be easily and conveniently handled. The handle provided by this invention is such as to enab e an operator to conveniently grip it with both hands.

It is another object ofthe invention to provide a slip which cannot be passed or lost through a rotary table, that is through the opening in which it operates.

It is a further ob'ect of. the invention to provide a slip suita 1e for use. in a spider as well as a rotary table.

The various objects and features of my invention will be bestand more fully under-.

stood from the followin detailed description of a typical form an a plication of the invention, throughout whic description I reerh to the accompanying drawings, in w 10 Fig. 1 is a plan view of a rotary table 1928., Serial No. 289,736.

terior or outside view of the slip showing the handle in an up or extended position. Fig. 3 is a plan, or top view of theslip showing the handle lowered or in a horizontal posi tion, and Fig. 4 isa detailed sectional view taken as indicated by line 44 on Fig. 3. The present invention is particularly useful as. applied to or in connection with slips such as are used in the usual form of rotary table of a rotary well drilling outfit. I have thereforeshown a typicaLrotary table 10 having the usual opening 11 to carry bushings, or the like. In the drawin s I have shown slip bushings 12 in the opening of the table-and have shown slips 13 embodying the present invention in position in the bushings 12 to hold a casing C. In the particular case illustrated I have shown a set of casing slips em bodying three individual or independently movable slips. It" is to be understood, of course, that the invention can be applied to slips of various sizes and shapes, a set of three slipshaving been shown merely for purpose of example. v

Each slip 13 embodying the present invention comprises a main part or slip body 14 and a handle l5. The slip body may, as far as this invention is concerned, he of any suitable form of construction, the present inventionbeing concerned primarily with the bandle and the combination of the body and handle. In the drawings I have shown a common and popular type of slip in which the-body is provided with a detachableinner face 16 to engage a casing, or the like. The outer portion-or exterior 17 of the body is made to seat or bear in the opening of the bushin 12.

The andle15' provided b this invention is attached to the upper en portion of the slip body 14 and has a projecting part-extending laterally beyond the body. In the preferred formof the invention illustrated in the drawings the handle comprises spaced legs 20 attached to the upper end oftheslip body and extending a substantial distance therefrom, a transverse or laterally-disposed head 21 projecting in either direction beyond the legs, and connecting parts 'or extensions 22 of the legs 20 joining the outer ends of the legs with the head 21. The legs 20 are attached to s aced points on the upper end of the slip body 14 and may extend in parallel relation from the body as clearly shown in 5 the drawings.

The head 21 is disposed transversely or at right angles to the legs 20 and is made sufficiently wide to extend beyond the legs so that it is wider than the slip body. In pracm tice the width or extent of the head 21 is made considerably greater than the smallest diameter of the opening in the bushing 12 so that the handle cannot possibly pass through the bushing. It will be obvious that 15 the length of the slip body and the combination of the slip body and handle make it impossible for the slip to be passed throu h the bushing 12 in a tilted position or si eways.

The handle may be formed so that the legs are outwardly divergent or shaped so that their outer ends connect directly with the 'outer ends of the head 21. In the form of the invention illustrated the legs are parallel, and therefore outwardly curved extensions 22 are provided to connect the outer ends of the legs 20 with the ends of the head 21. In practice it is preferred to form the entire handle of a single bar or strap of metal, it being obvious from the drawings how the handle can be easily bent or forged from plain bar stock.

It is desirable to provide a flexible, for instance pivotal connection, between the handle and slip body. In the drawings I have shown lugs 30 provided on the upper end portion of the slip body and have shown a pivot pin 31 passing through the lugs 30 and through eyes 32 in the legs 20 of the handle to pivotally connect the legs with the slip body.

From the foregoing description it will be apparent that my invention provides a slip with a handle that can be conveniently and effectively gripped. The head portion 21 of the handle is of such extent and is so disposed as to give an o erator a very convenient purchase on the s ip. The handle being proportioned to project laterally from either side, or beyond, the body of the slip, positively prevents the slip from being lost through the opening in the slip bushing 12. The com- 3. A sli to operate in an opening in a rotary tab e including, a body to extend into the opening, and a handle on the body having a portion projecting in opposite directions laterally beyond the body so that it is wider than the opening.

4. A slip to operate in an opening in a rotary table including, a body to operate in the opening, and a handle on the body including legs attached to the body and projecting therefrom, and a head on the outer ends of the legs, the head being substantially wider than the body and the opening.

5. A slip to operate in an opening in a rotary table including a body 'to operate in the opening, and a handle on the body ineluding, legs pivotally connected to the body and extending in parallel relation therefrom, and a head carried by the outer ends of the legs transversely thereof, the head being Wider than the body and wider than the opening in the rotary table.

n witness that I claim the foregoing I have hereunto subscribed my name this 5th day of June, 1928.

RICHARD V. UHRIG.

bination of handle and slip provided by this invention forms a structure that cannot be worked or manipulated in any way to pass through the bushin opening, this beingtrue even after the slip body has been materially worn.

Having described only a typical preferred form of my invention, I do not wish to limit myself to the specific details set forth, but wish to reserve to myself any changes or variations that may appear to those skilled in the art or fall Within the scope of the following'claims. Having described my invention, I claim:

Images