US1143257A - Combined rotary drilling nut and slips. - Google Patents

Description

E. DOUBLE. COMBINED ROTARY DRILLING NUT AND SLIPS.

APPLICATION FILED JUNE 8. I9I4.

Patented June 15, 1915.

To all 'wko/mit may concern:

Be it known that I, EDWARD a citizen of 'the United States, residing at Los Angeles, in the county of Los Angeles and State of California,'have invented a new and useful yCombined Rotary Brilling Nut and Slips, of which the followingis a specification.

This invention relates to a combined drilling nut -and slips for rotary drilling.

Heretofore, so far as I am aware, in r0- tary drilling, the respective operations of rotating the stem anddrill and of suspending the string, have been accomplished by two dierent instrumentalities, a nut being employed for rotating the stem, and separate slips being employed for suspending the string. When rotating the stem, the nut has been placed in operative relation between the table and stem to impart rotation from the table to the stem. lin suspending the string the slips have been placed in substitution for thenut in o erativ'e relation between the table and. 'ng to suspend the string. rIhus, for two different operations, these two separate instrumentalities have been used interchangeably and either one in substitution for the other, according to theoperations to be performed. Where two separate 'instrumentaliti are employed in such manner, it has been customary tp lift the nut out of engagement with the table by means of. the coupling in the string immediately below the nut which formsan enlargement adapted for 'the purpose. When the' nut was thus lifted outof place in the table the slips were inse i in lieu thereof. When Ithe' nutA was usedv in engagement with the table, the slips had to be removed and laid at one side.

With my inventionthe disadvantages of having two separate instrumentalities are avoided 4and a single element is provided thatis so constructed that, when pla in one 'position with respect to the stein and the table, it actsas a nut to revolve th'e'stem, and, when placed in another position. between th'e string and the. table it acts as slips to engage the' drill pipe and mend t string.

ln carrying ont my invention, I employ a member'whicli on one sideis formed to en gage the string as a slip, and itsothersldfe is formed to engage the drilling stein to produce rotation thereof, and either side is adapted to co-act with the vtable while the geniessen if ses @anni .Ententes Func t5, 19m entienden tiled un'e a, 181e.

i No. M8107.

act' with the drilling stem arev se constructed aS t0. also co-act with the table when the members are employed as slips te suppsrt the string. v

rEhe members are reversible with respect to each other so that their slip surfaces may be arranged toward each other for gripping and suspending the string, o r their nut surfaces may he placed toward each other in position tpr engaging, the drilling stem.

Referring to the drawings, Figure l is a side elevation of' the upper pant of the rotary stem, showing the. table in cross section. with the device operating as a, nut. Fig. 2 1s a. View,y similar to Fig. li, Showing the device acting as slips. Eig. Sais a plan view ofthe table as arranged in Fig. 1. Fig. 4 is a view, similar teilig. 3, showing the table as arranged-in Fig. 2. Fig'. 5 is a persDective view of a member, looking toward thenut side. Fig. Gvis a perspective view of a member, lookingl toward the slip side. Fig. 7V is a perspective view off one of. the members ofthe split bushing.

1 designates the drilling-stem which has one or more faces adapted to co-act with the nut to be 'described for producing the rotative movement of the and the-string, the stem preferably.A being squarein cross section.

2 designates the lower portion of the string consisting ofthe usual drillingpipe which is connected with the drilling stem 1 by e couplingt 3.-

4. designates he rotary table, operated in well=known manner by bevel gear 5 and bevell pinion 6.' The tablev 4 is recessed at the center to receive a split bushing, consisting of two members 7. which are provided with shoulders 8- which take against similar vshoulders. 9 on the table. and the outer portions ofthe, members 7 below the shoulders B are. round, while above the shoulders 8 they are square, that is tov say, the two u rstogether form a Square, as clearly Ashown in Figs. 3-and 4.. Each of the members 7 is also provided with4 a vertical notch 10, the backl wall 11 of which is I preferably employ two such s inclined,V` andwi-th an inner flange 12; handholds 13 are preferably provided on the and withdrawn. Each of the members isv alsoprovided with a rabbet 14, so that when be used as slips, they are lifted out, reversed,

the two members are in position a slot 15 is provided on opposite sides, which enables the passage of a fish tail bit without withdrawing the split bushing. The combined nut and slips, as herein shown, are formed of two segmental members 16, each having a longitudinal groove 17, the bottom of which is parallel with the face in which it is formed. On the other side the member is formed with a concave groove 18, which is provided with transverse ribs or teeth 19, the groove and face in which it is formed being at an angle to the opposite face. For convenience of description I will refer to the inclined face having the teeth as the slip face, and the other face as the nut -face. Either member is also preferably provided with suitable handholds 20 for withdrawing it. Onl the nut facelthe wall on either side of the groove 17 forms flanges 21, and on the slip face flanges 22 are formed.

When the members are to be used as a nut, as in Fig. 1, .they are inserted in the split bushing, with the flanges 21 touching each other, and the anges 22 in contact with the inclined back wall 11 of the associated member of the split bushing. When thus in position, the'two grooves 17 form a nut, square in cross section, as clearly shown in Fig. 3, which nut engages the drilling stem 1 and acts to revolve the same as they table revolves. When the members are to and reinserted, as shown in Fig. 2, with the flanges 21 resting against the walls of the split bushing, and the teeth 19 of the-slip faces bearing against the drilling pipe 2 and biting the same in such a`manner ast support the string. The gripping effect o the teeth 19 is produced by weight of the strin acting downwardly on the wed eshape members and forcin their teeth rmly into the drilling pipe. en the members are in` use as slips, with their teeth 19 in contact with the drilling pip, the teeth.of both members are parallel. When the members are used asnuts, thefiange 12 forms a positive support for the members, preventing them from dropping through or from wedging the string.

What I claim is:

1. In combination with a rotary string, a rotary table, a plurality of members rotated by the table, each of said members being provided with means on one surface for holding. the strin against longitudinal movement, and wit means on another surface for 1mparting rotation to the string vwhen the table is rotated.

l2. In combination with a rotating table and string, a plurality of members rotated by the table, each of said members having a vmembers, each of said members being provided with means for supporting the string against longitudinal movement, and with means for rotating the string, said table Y having inclined supporting means for sup porting said wed e shaped members.

5. In combinatlon with a rotating table and string,`members reversibly mounted on the table, and each provided with a face 1 having a series of teeth for gripping -the string to suspend the string and provided with another face having a fiat surface for engaging the attened surface of the stem of the string for rotating the string.

6. In combination with a rotating table and string, a plurality of members reversibly mounted on the table, each of said members provided with a concave surface having a series of transverse corrugations from the teeth adapted to engage and suspend the string, each of said members having a longitudinal groove formed in the oppositeface adapted when the member is reversed to engage the stem of the string -to rotate the same.

7. In combination with a rotating table and string, a bushing in the ,table ormed with a tapering inner wall, and members reversibly mounted in said bushing and fitting between said wall and string and each provided on `one face' with means for'supporting the string and on another face with means for rotatingthe string.

8. In combination with a rotary table and string, a split bushing in the table, the members of the bushin having. inclined inner walls, a plurality o wedge shaped members fitting against the inclined inner walls of the bushing and against the string, each of said members having a face with teeth for 'ping the string to suspend the same and avmg another face with a attened surface to engage the stem of the string to rotate the same.

9. In combination with a rotary table and string, a split bushing in the table, the members of the bushin having inclined inner walls, a plurality o wed e shaped members fitting against the incline inner walls of the bushing and against the string, each of said members having a face With teeth for gripping the string to suspend the same and having another face with a attened surface to engage the stem of the string to rotate the same, the rst mentioned face of each member having 'anges adapted to rest against the inclined face of the bushing when the opposite face is in engagement With the stem, and the second mentioned face of the member being provided-with flanges adapted to rest against the inclined face o the bushing when the opposite face is engaging the string to suspend the same.

l0. In combination With a rotary table and string, a split bushing in the table, the members of the bushing having inclined inner Wails, a plurality of Wedge shaped members fitting against the inclined inner Walls of the bushing and against the string, each of said members having a face with teeth for gripping the string to suspend the saine and having another face with a iattened surface to engage the stem of the string to rotate the same, said bushing having an inward flange for supporting said members when Vthey are engaging the stem to rotate the string.

11. In combination with a rotary table and `theinclined Aface of the bushing when the opposite face is in engagement With the stein, and the second mentioned face of the member being provided With flanges adapted tq rest against the inclined face of the bushing when the opposite face is engaging the string to suspend the same, said bushing having longitudinal slots to permit the passage of a fish-tail bit.

In testimony whereof I have hereunto set my hand at Los Angeles, California, this day of May 1914.

EDWARD DOUBLE.

In presence of- FREDERICK S. LYON, LORRAINE E. DUnRAN.

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