US1945876A - Rotary machine - Google Patents

Description

Feb. 6, 1934.

F. J. YOUNG ROTARY MACHINE Filed Feb. 29, @928 3 Sheets-Sheet '1 F. J. YOUNG "ROTARY MACHINE Feb. 6, v 1 934,

3 Sheets-Shet 2 Feb. 6, 1934.

F. J. YOUNG 1,945,876

ROTARY MACHINE Fil ed Feb. 29, 1928 3 Sheets-Sheet 3 v 3mm Patented Feb. 6, 1934 ROTARY MACHINE Forrest J. Young, Torrance, Calif., assignor to The National Supply Company of Delaware, New York, N. Y., a corporation of Delaware Application February 29, 1928. Serial No. 257,823 13 Claims. (o1. 255-23) This invention relates to a rotary machine, and is more particularly related to a rotary machine including automatically operated slips which may be actuated to and from the gripping position without manually raising the slips from the bore of the table of the rotary machine.

In the operation of rotary tables, as employed in connection with the rotary process of drilling wells, large gripping devices 'known asslips are [0 employed for gripping the pipe. These gripping devicesor slips are heavy and difficult to remove from the bore of the rotary table and many accidents have occurred in the handling of these slips both in the removing of the slips from the bore- 15 ofthe table and in the replacing of the same.

Many attempts have been made to provide means for raising the slips from the rotary table automatically either with the drill stem as the same drawn vertically-upward through the bore of the table or by other mechanical means. These attempts, however, have not heretofore been sat isfactory as is believed to be demonstrated by the fact that in no commercial rotary machine is there embodied a means for automatically handling the slips. It is, therefore, an object of this invention to provide a rotary machine with means for automatically raising and lowering the slips in the bore of the rotary table to and from the gripping position and which means are operative irrespective of the load carried by the same. Another object of this invention is to provide a rotary table having means for automatically raising and lowering the slips in the bore of the table which means include means for not only positively raising the slips in the bore of the rotary table but for positively lowering the slips therein so that the lowering of the slips in the bore of the rotary table to the gripping position I is not dependent upon the force of gravity alone. Another object of this invention is to provide a rotary machine having means for automatically raising and lowering the slips in the bore of the rotary table including means for drawing the slips transversely of the bore of the rotary table as the slips are raised therein and for holding the slips in the non-gripping position when the same are raised.

Another object of this invention is to provide a rotary machine including means for automatically raising the slips which means are constructed in two semi-cylindrical sections permitting the same to be assembled within the rotary machine with a minimum of labor and including dividing plates which divide the two semi-cylindrical sections and which also provide means for preventsuitable or desirable construction and which includes a base 2 upon which a table 3 is rotatably ing the slips rotating relative to the rotary table.

Another object of this invention is to. provide a rotary table including a plurality, of slips having insert liners mounted intheir inner periphery;

and which insert liners may be easily removed or replaced as desired. Other objects and advantages of this invention,

it is believed,.will be apparent from the following detailed description of a preferred embodiment thereof, as illustrated in the accompanying e5 drawings:

In the drawings: i

Figure l is an elevation partly in vertical midsection of a rotary machine embodying this invention. Figure 2 is a top plan view of a master bushing carrying mechanically operated slip means embodying this invention.

Figure 3 is a side'elevation thereof.

Figure 4 is a sectional side elevation taken substantially on the line 44 of Figure2, illustrating the slips as actuated to the gripping position.

Figure 5 is a sectional elevation similar to Figure 4, illustrating the slips as actuated to the non-gripping position.

Figure-6 is a fragmental sectional view illustrating a modified form of cam roller construction embodied in this invention.

Figure 7 is a fragmental end elevation thereof, illustrating the cam roller as riding on a fragment-of the cam ring. I

In the preferred embodiment of this invention,- as illustrated in the accompanying drawings, 1 indicates a rotary machine which may be of any mounted. The table3 is driven by any suitable form of drive means such, for example, as is illustrated at 4. Mounted in the rotary table 3 is a master bushing 5, which is constructed of two complementary sections 6 and 7 dividing the master bushing 5 on a. vertical mid-plane. The master bushing 5 is formed at its upper end with a square portion which fits within and is adapted to be driven by the rotary table 3. The master bushing 5 fits withinan axial bore formed in the rotary. table 3. The master bushing 5 is provided with a tapered bore having. aplurality of annular channels or recesses 8 and 9 formed therein. Fitting within the bore of the master bushing 5 are'slips 10 which are formed with shoulders or flanges 11- and '12 complementary to the channels or recesses 8 and 9; respectively. The recesses 8 and 9, and annular flanges 11 and 12 are formed with complementary riding 110 surfaces, as indicated at-13 and 14, for guiding the slips 10 inwardly transverse of the bore of the master bushing as the same are forced downwardly therein. The peripheries of the flanges 11 and 12 are formed tapered complementary to the taper of the sections 15 and 16 of the master bushing 5. Formed preferably at the upper portion of the master bushing 5 is an inwardly extending annular flange 17 which extends inwardly-into the bore of the bushing 5 beyond the extension of the tapered surfaces 15 and 16 of the bore formed through the bushing 5 to provide an inwardly extending riding surface 18 which engages the outwardly extending riding surface 19 formed on the upper surface'of the flange 12. The surfaces 18 and 19 are tapered complementary so that when the slips 10 are raised, the surfaces 18 and 19 are engaged to cause the slips 10 to be moved transversely of the bore formed through the master bushing and hence outwardly away from the gripping position. These overhanging riding surfaces 18 and 19 also provide holding means which prevent late eral displacement of the slips 10 in the bore of the bushing 5 when the slips have been moved to the non-engaging position. A further riding surface is provided between the slips 10 and master bushing 5 at 20. Formed on the upper surface of the flange 17 is a downwardly tapered riding surface 21 tapered complementary to the riding surface 22 formed on the slips 10 which, together with the complementary riding surfaces formed at 13 and 14, cause the slips to move inwardly as the same are forced downwardly in the bore formed through the master bushing 5.

Means are provided for raising and lowering the slips 10 in the bore of the master bushing 5, which means are preferably of the following, construction:

A ring 23 formed in two sections'24 and'25 is mounted on the upper surface of the master bush-- ing and is provided with a clove-tailed projection 24a which fits within a dove-tailed recess 25a. The ring,23 is provided with cam ways 26 into which cam rollers 27 fit. The cam rollers 27 are carried by pins 28 which pass through the segments of the slips 10, as illustrated at 29. As

'the ring 23 is rotated, relative to the master bushing 5, the slips-10 are raised and lowered in the bore formed through the master bushing 5.

Positioned on the abutting faces of the master bushing sections 6 and '7 are plates 30 which fit in ways 31 and retain the slips of each section in a confined assembly so as to facilitate handling of the individual sections as distinct units ,around the derrick floor. The plates 30 also prevent the segments of the slips from rotating relative to the master bushing 5. The plates 30 are held in position by means of the tapered ends 32 thereof, fitting into the lower tapered sections of the cut out recesses 31, and are also held in position by means of bolts, screws or the like which pass through the wall of the master bushing 5. The plates 30 extend upwardly beyond the upper end of the ring 23 and support a frusto-conical ring 33, which provides a guide by means of which the drill stem 34 is guided through the bore or passage way formed through the slips 10. Intermediate the plates 30 automatic slip raising and lowering means.

In order to provide slips 10 with gripping surfaces and in order to provide an inexpensive replaceable gripping means on the slips so as not to require the construction of an entire new set of slips each time the gripping surfaces wear from their inner periphery, it is preferable that the slips 10 be provided with insert liners. The insert liners herein provided are illustrated at 36 and are held in position principallyagainst downward longitudinal movement relative to the slips 10.. The insert liners 36 are held in this manner as this tendency for the liners 36 to slip longitudinally downward relative to the slips 10 is the only real force exerted against the slips relative to the liners 10 with the possible exception of a radial thrust which is imparted to the slips when the rotary table is rotated, while the slips are gripping the drill stem 34. The liners 36 are, therefore, provided with an annularly extending gripping means 37 which fits within an annularly extending recess 38 formed in the inner periphery of the slips lO. The liners 36 are also tapered at their lower ends 39 to fit within a complementary tapered annular recess formed in the inner periphery of the slips 10. In this manner'the liners are also easily removable by merely lifting the same vertically relative to the slips 10. In order to hold the liners 36 in position, and also in order to prevent the same from moving radially relative to the slips 10, the pins 28 which carry the cam rollers 2'7 are passed through bores formed in the upper end of the liners 36. The liners 36 are of a width equal to the width of the slips l0 and are of substantially the same length as the slips 10 in order to provide a maximum of gripping surface.

' Means are provided for rotating the cam ring 23, which means preferably comprise a pair of trunnions 40 which are engaged by means of a wrench indicated in dotted lines at 41. The wrench is removably secured to the trunnion 40 in order to eliminate the handle thereof projecting outwardly when the rotary table is being revolved.

In order to permit the slips 10 to ride easily in and out of the gripping position, the cam rollers may be formed as illustrated in Figures 6 and 7 wherein the pins 28a are illustrated as formed withtwo vertically spaced longitudinally extending ball-ways 29a intowhich ball bearing members 30a are fitted. The pins 28a are held from rotating by means of a key 31a which fits into a key recess 32a formed in the reduced portion 33a of the pin 28a. A shoulder 34a is formed on the pin 28a in the position to engage the shoulder 35a formed in the bore through the slip 10a into which the pin 28a is fitted. The pin 28a is held in position by means of a nut 36a screw-threaded to the end of the pin 28a within the cut-out portion of the slip 10a. The nut 36a may be locked in position by means of a pin 37a passed through a slot. formed in the nut 36a in a bore formed through the pin 28a. The roller assembly, as above described, permits the slips 10a to be carried vertically ,in the ways formed in the cam ring 23, the upper balls 30a engaging the top of the ring in the cam-way when the slips 10a are being carried downwardly and outwardly into the gripping position and the wardly transversely of the direction of rotation ofthe cam ring wtihout causing undue friction,

thereby insuring that the slips 10a may be raised and lowered with a minimum of eiIort.

Having fully described my invention, it is to be understood that I do not wish to be limited to the details herein set forth, but my invention is of the full scope of the appended claims.

I claim:

1. In a rotary machine, the combination of a base, a table rotatably supported on the base, and a master bushing assembly including a pair of half sections, slips mounted in said half sections, a cam ring including two halves rotatably mounted on said half sections, and cam rollers secured to said slips in position to ride in cam ways formed in said cam ring to raise and lower said slips.

2. In a rotary machine, the combination of a base, a table rotatably supported on the base, and a master bushing assembly mounted in a bore formed axially of the table, said master bushing assembly including a pair of half sections, slips mounted in said half sections, a cam ring including two halves mounted on said half sections to rotate relative to said half sections, and cam rollers secured to said slips in position to ride in cam ways formed in said cam ring to raise and lower said slips.

3. In a rotary machine, the combination of a base, a table rotatably supported on the base, and

a master bushing assembly mounted in a bore formed through the said table, said master gushing including two half sections, each of said half sections including a half cam ring rotatably supported by said half section of bushing assembly, slips removably mounted in a bore formed through said bushing assembly, dividing plates interposed between said half sections to hold said slips from falling out of said half sections of bushing assembly, and means operable in the cam ways formed in said cam ring on rotation of the cam ring to raise and lower said slips in said bushing assembly bore.

4. In a device of the class described, the combination of a master bushing divided to provide two half sections, a cam ring rotatably mounted on said half sections, slips movably mounted in a bore formed through said bushing, liners for said slips, pins passed through said liners and slips to hold the liners secured to the slips, and antifriction means mounted on said pins to support the slips in ways formed in said cam ring.

5. In a rotary machine, the combination of a base, a table rotatably supported on the base having an axial bore therethrough, a master bushing mounted in said bore, said master bushing being divided upon a vertical mid-plane to provide two complementary half sections, the master bushing having a tapered bore formed therethrough, slips mounted in said tapered bore, a split cam ring mounted on said half section, means for rotating the split cam ring, means secured to said slips and extending into waysformed in'the split cam ring for raising and lowering said slips as the ring is rotated, table. I

6. In a rotary machine the combination of a base, a table rotatably supported on the base, a multiple section master bushing assembly mounted in said table, sectional slips mounted within the master bushing assembly, and means including a multiple piece cam ring secured to said bushing assembly and rotatable to raise and lower all 01' the slips simultaneously.

'7. In a rotary machine, the combination of a and means for driving the rotary slips with the cam ring, and means for actuating the cam ring to simultaneously raise or lower the slips canied by both parts of the bushing.

8. In a rotary machine, the combination of a base, a table rotatably supported on the base, a split two part bushing in an opening in the table, slips carried by each part of the bushing, a plate carried by each part of the bushing to hold the slips inposition and from rotation relative to the bushing, a two part cam ring, one part of which is carried, by each part of the bushing, means connecting the slips with the cam ring, and means for actuating the cam ring to simultaneously raise or lower the slips carried by both parts of the bushing.

9. In a slip handling device, the combination of a body, a cam ring rotatably mounted on the body, slips movably mounted in a bore formed through the body, liners for said slips, pins passed through said liner and slips to hold the liners secured to the slips, and anti-friction means mounted on said pins to support the slips in ways formed in the cam ring.

10. In a slip handling device, the combination of a body, a cam ring rotatably mounted on the body, slips movably mounted in a bore formed through the body, pins securedto the slips, antifriction means mounted in the upper and lower portions of said pins to engage cam-shaped surfaces formed in the ways of said cam rings.

11. In a slip structure, the combination of a body having an opening therethrough, a split two part bushing in the opening of the body, slips carried by each part of the bushing, a two part cam ring one part of which is carried by each part of the bushing, means operatively connecting the slips with the cam ring, means for actuating the cam ring to simultaneously raise or lower 'theslipscarried by both parts of the bushing.

12. In a rotarymachine-, the combination of a base, a table rotatably supported on the base, a master bushing assembly mounted in a bore formed through said table, said master bushing including two half sections, slips removably mounted in a bore formed through said-bushing assembly, retaining plates interposed between said halt sections to hold the slips in their respective mounted in a bore formed through said bushing assembly. retaining plates interposed between said half-sections to hold the slips'in their respective having an inverted 'frusto-conical opening to guide the pipe into said bushing assembly, depending spacers provided on said semi-annular ring for spacing the slips in said bushing assembly.

J. YOUNG.

positions, said retainer plates extending upwardly and terminating into a semi-annular ring

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