US1891832A - Elevating and rotating device - Google Patents

Description

Dec. 20, 1932. R. PARKS 1,891,832

ELEVATING AND ROTATING DEVICE Filed June 23, 1930 2 She ets-Sheet O T 1 T 3 f5 I3 13 if Q 8 'll 5 I 7 13 lo II I "i v I. H E @3 $5 I 58 ,46 4 I I I r v f l I E- v 6 /8 45' O I i 553% 2'7 Us! TI INVENTOR Hoes/qr E PARKS.

Dec. 20, 1932. R. F. PARKS ELEVATING AND ROTATING DEVICE 2 Sheets-Sheet 2 INVENTOH v ROBERT F. PARKS Filed June 23, 1950 ATTORNEY.

Patented Dec. 20, 1932 ROBERT F. PARKS, F COMPTON, CALIFORNIA ELEVATING AN D ROTATING DEVICE Application filed June 23,

This invention relates to an elevating and rotating device, by means of which one stand of pipe is unscrewed from another. This device is particularly advantageous around an oil well during either the drilling or producing operations. The prime object of my invention is to provide a novel elevating and rotating device which attaches to the top of the stand of pipe to be unscrewed, and is actuated by the upward movement of the blocks which support the device. I

Another object is to provide a novel elevating and rotating device of the character stated which operates through a gear means between the blocks and the elevator encircling the pipe, thereby rotating the pipe to screw or unscrew the same.

Still another object is to provide a device of the character stated which is attached to the elevating blocks, and which will also serve to support the pipe while it is being removed from the point where it was unscrewed from the lower stand.

Other objects, advantages, and features of invention, may appear from the accompanying drawings, the subjoined detailed description, and the a pended claims.

In the drawings Figure 1 is a side elevation of my elevating and rotating device in operative position.

Figure 2 is an enlarged side elevation, with parts in section, of my device.

Figure 3 is a longitudinal, sectional view of the rotating screw, and the rotating means co-operating therewith.

Figure 4 is a bottom plan view of the weight.

Figure 5 is a top plan view of the bridge, and of the rotating screw.

Referring more particularly to the drawings, the numeral 1 indicates the rotary table in which the lower stand of pipe 2 is secured. The stand of pipe 3 rises above the rotary table and is secured to the stand 2 by a threaded joint. After this joint has been loosened by the tongs, or the like, my device becomes operative to unscrew the joint and remove the stand 3.

My elevating and rotating device 4 com- 1930. Serial No. 463,161.

prises a bail 5 which is secured to a block 6. The block 6 is positioned at the bottom of the bail 5 and the purpose thereof will be further described. The travelling blocks 7 are at tached to the bail 5 by means of an eye 8 which depends from the blocks.

A bridge 9 is secured between the bail 5 adjacent the upper end thereof. In this bridge I journal a pair of sheaves 1011. The purpose of these sheaves will be further described. An actuating shaft 12 depends from the bridge 9 and is non-rotatably held in the bridge by some suitable means, although under strain, it is desirable that the shaft shall rotate in order not to break any of the co-acting parts. To accomplish this purpose, I provide a drum 13 on the top of the shaft 12, and this drum is engaged by a pair of brake shoes l l14. The brake shoes grip the drum tightly so that the drum and the shaft can only rotate when a very high torque is exerted upon the shaft. The brake shoes 1 i14 are pressed together by suitable springs 15-15 and 1616. The shaft 12 is cut with a double thread as. shown at 17, and these threads are'engaged by members so as to rotate the pipe stand 3, as will be subsequently described.

The shaft 12 extends into a sleeve 18 and moves up and down in the sleeve during the operation of the device. To the lower end of the sleeve 18 there is pivotally secured a yoke 19 and a pair of links 202O fit over the yoke 19. The lower ends of the links 2020 are attached to an elevator 21, which elevator engages and grips the upper end of the pipe stand 3. The elevator 21 may be of any usual p, and well known design, and the detailed construction thereof forms no part of this invention.

A pipe section 22 is suitably attached to the upper end of the sleeve 18, and this pipe section extends upwardly around the shaft 12. To the inside of the pipe section 22 I secure a pair of superposed female clutch members 23-24. (Jo-operating with the clutch member 23, is a male clutch member 25, and similarly a male member 26 co-operates with the clutch 24. The clutch members 26 are each'provided with grooves which engage the left and right hand threads respectively, of the shaft 12. Thus the member 25 will constantly rotate in a right hand direction while the clutch member 26 will rotate in a left hand direction. Whichever member of the pair 25-26 engages its corresponding female clutch member, that is the direction in which the pipe section 22 and the sleeve 18 will rotate.

It is evident that one of the members 25 or 26 must be held-out of engagement at all times. That is, only one must engage its corresponding female clutch member. To accomplish this, I surround the pipe section 22 with a rotatable ring 27. This ring is provided withupward and downward extending cam slots 2829 respectively. A pair of clutch releasing fingers 3031 are positioned in the pipe section 22, and surround the shaft 12. These releasing fingers have outwardly.

extending pins 3233 respectively which enter the cam slots 2829 respectively. Thus as the ring 27 is rotated, one of the clutch engaging fingers 30 or 31 is moved into engagement with the corresponding male clutch member 25 or 26 to hold said male member out of operative engagement, as

shown in Figure 3. The other member will be free to engage its female clutch member, and thus rotate the pipe section, sleeve and attached parts either to the left or to the right. By the above arrangement, it is impossible to have both of the clutches simultaneously operable.

The sleeve 18 is guided through the blocks 6 and a ball bearing 34 is mounted in the top of said block, and the bottom of the pipe section 22 engages the ball bearing in the lowered position of said section, and thus minimizes the frictional resistance between the block and the pipe section.

To return the sleeve 18, pipe section 22 and attached parts to their raised position. I provide a counter weight 35 which is slidably mounted on the bail 5. and the counter weight surrounds the sleeve 18. A pair of chains,

cables, or the like. 3637 are secured to the weight 35, pass over the sheaves 1011 respectively, and then extend downwardly and are attached to the races of a ball bearing 38. The ball bearing 38is mounted in a fitting 39 which is secured to the top of the pipe section 22.

' engage recesses 45-46 in the bail.

The operation of my invention is as follows: The blocks 7 are lowered until the elevator 21 can engage the upper end of the pipe stand 3. The clutches 25 or 26 have been previously arranged so that the rotation of the sleeve 18 will be counter clockwise. Now, by pulling upwardly on the block 7, the bail 5, bridge 9 and shaft 12 will also be pulled upwardly relative to the sleeve 18, pipe section 22, and the clutches therein. This relative movement of the clutch and the threads in the pipe will cause the engaging clutch to rotate and also carry with it the pipe section, sleeve, the links 20 and the elevator 21. Since the elevator tightly grips the top of the pipe stand 3, it will unscrew the same from the stand 2.

The block 7, bail 5 and attached parts are held against rotation because of. the spaced cables which encircle the sheaves in the travelling block. As soon as the pipe stand 3 has been unscrewed, the operator can continue to raise the pipe the required amount and move it to one side of the derrick, or any place desired. When the pipe stand 3 has been removed to its desired place of storage, the counter weight 35 is latched in its raised position until the next stand has been engaged. Then it is released and will drop into its lowermost position as shown in Figures 1 and 2, and the device is ready for the next operation.

The counter weight 35 .is slightly heavier than the combined weights of the elevator, links, yoke, sleeve 18. pipe section 22 and the clutch assemblies. The reason for this is that the counter weight must raise all of these in order to prepare the device for its next rotating operation. The threads 17 on the shaft 12 are of sufficient length so that the proper number of turns is imparted to the elevator 21 in order to unscrew the pipe stand 3.

A stout coil spring 47 is set in a recess in the block 6 and this spring bears against the ball bearing 34. The purpose of this spring is to relieve the shock when the elevator 21 engages the collar on the top of the pipe stand 3 when this pipe stand is being elevated.

Having described my invention. I claim:

1. An elevating and rotating device for pipe comprising travelling blocks, a bail suspended from the travelling blocks. a threaded shaft mounted in the bail, a sleeve extending over the shaft, means on the sleeve engageable with the threads'of the shaft wherebv said sleeve is rotated as the blocks are raised. an elevator and links attached to the elevator and to said sleeve, and counter weight means attached to said sleeve whereby said sleeve is drawn upwardly over the shaft when the pipe is disengaged from the elevator.

2. An elevating and rotating device for pipe comprising travelling blocks, a bail suspended from the blocks, a threaded shaft mounted in the bail, a sleeve extending over said shaft being formed with right and left hand threads, one of said clutches engaging the right hand threads and the other the left hand threads, disengaging means for the clutches, an elevator, and means suspending said elevator from the sleeve.

- 4. An elevating and rotating device fdr pipe comprising travelling blocks, a bail suspended from the travelling blocks, a bridge secured to the bail, a threaded shaft suspended'from the bridge, a sleeve extending over the shaft, a pair of clutches in the sleeve, said shaft being formed with right and left hand threads, one of said clutches engaging the right hand threads and the other the left hand treads, disengaging means for the clutches, an elevator, and means suspending said elevator from the sleeve, and counter weight means attached to the sleeve whereby said sleeve is raised when there is no work in the elevator.

5. An elevating and rotating device for pipe comprising travelling blocks, a bail sus-.

pended from the blocks, a bridge in the bail, a threaded shaft suspended from the bridge, a sleeve extending over the shaft, said shaft being formed with right and left hand threads, a pair of clutches in the sleeve, one of said clutches engaging the right hand, and the other the left hand threads, means engaging said clutches whereby either may be held inoperative, an elevator adapted to grip the pipe, and links attached to the elevator and to said sleeve.

6. An elevating and rotating device for pipe comprising travelling blocks, a bail suspended from the blocks, a bridge in the bail, a threaded shaft suspended from the bridge, a sleeve extending over the shaft, said shaft being formed with right and left hand threads, a pair of clutches in the sleeve, one of said clutches engaging the right hand, and the other the left handthreads, means engaging said clutches ,whereby either may be held inoperative, an elevator adapted to grip the pipe, and links attached to the elevator and to'said' sleeve, a counter weight, means attaching said counter weight to the sleeve, said counter weight being adapted to pull the sleeve upwardly when there is no work in the elevator.

7. An elevating and rotating device for pipe comprising travelling blocks, a bail suspended from the blocks, abridge on the bail, a threaded shaft suspended from the bridge, brake means gripping said shaft, a sleeve extending over the shaft, said shaft being formed with right and left hand threads, a pair of clutches in the sleeve, one of said clutches engaging the right hand, and the other the left hand threads, means whereby on of said clutches is held inoperative while the other is active, an elevator, and means attaching said elevator to the sleeve.

8. An elevating and rotating device for pipe comprising travelling blocks, a bail suspended from the blocks, a bridge on the bail, a threaded shaft suspended from the bridge, brake means gripping said shaft, a sleeve extending over the shaft, said shaft being formed with right and left hand threads, a pair of clutches in the sleeve, one of said clutches engaging the right hand, and the other the left hand threads, means whereby one of said clutches is held inoperative while the other is active, an elevator, and means attaching said elevator to the sleeve, a counter weight, sheaves journaled in the bridge, chains attached to the counter weight and extending over the sheaves, and means attaching said chains to the sleeve whereby said sleeve is pulled upwardly when there is no work in the elevator.

9.- An elevating and rotating device for pipe comprising travelling blocks, a bail suspended from the blocks, a bridge on the bail, a threaded shaft suspended from the bridge, brake means gripping said shaft, a sleeve extending over the shaft, said shaft being formed with right and left hand threads, a pair of clutches in the sleeve, one of said clutches engaging the right hand, and the other the left hand threads, means whereby one of said clutches is held inoperative while the other is active, an elevator, and means attaching said elevator to the sleeve, :1 counter weight, sheaves journaled in the bridge, chains attached to the counter weight and extending over the sheaves, and means attaching said chains to the sleeve whereby said sleeve is pulled upwardly when there is no work in the elevator, and latch means on the. counter weight whereby said counter weight is held in raised position and is inoperative to elevate the sleeve. 7

10. An elevating and rotating device for pipe, comprising travelling blocks. a bail suspended from the blocks, a bridge in the ball, a threaded shaft suspended from the bridge, said shaft being formed with right and left hand threads, a sleeve extending over the shaft, a pair of clutches in the sleeve, one of said clutches engaging the right hand, and the other the left hand threads of the shaft, a pair of clutch releasing fingers in the sleeve, said fingers engaging each of the clutches, a ring encircling the sleeve, said ring having cam-slots therein into which the outer ends of the clutch releasing fingers extend, said cam slots beingso arranged that one of the clutch releasing fingers engages a clutch while the other is disengaged from the second clutch, an elevator, and means attaching said elevator to the sleeve.

11. An elevating and rotating device for pipe comprising travelling blocks, a bail suspended from the blocks, a bridge in the bail, a threaded shaft suspended from the bridge, said shaft being formed with right and left hand threads, a sleeve extending over the shaft, a pair of clutches in the sleeve, one of said clutches engaging the right hand, and the other the left hand threads of the shaft, a pair of clutch releasing fingers in the sleeve, said fingers engaging each of the clutches, a ring encircling the sleeve, said ring having cam slots therein into which the outer ends of the clutch releasing fingers extend, said cam slots being so arranged that one of the clutch releasing fingers engages a clutch while the other is disengaged from the second clutch, an elevator, and means attaching said elevator to the sleeve, a counter weight slidably mounted on the bail, a pair of sheaves journaled in the 'bridge, chains extending over the sheaves, one end of the chain being attached to the counter weight and the other end to the sleeve whereby said sleeve is moved into raised position when there is no work in the elevator.

In testimony whereof, I afix my signature.

ROBERT F. PARKS.

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