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Publication numberUS1422289 A
Publication typeGrant
Publication dateJul 11, 1922
Filing dateDec 17, 1920
Priority dateDec 17, 1920
Publication numberUS 1422289 A, US 1422289A, US-A-1422289, US1422289 A, US1422289A
InventorsMoody Joseph F
Original AssigneeMoody Joseph F
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Gripping device
US 1422289 A
Images(3)
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Description  (OCR text may contain errors)

- J. F. MOODY.

GRIPPING DEVICE.

APPLICATION FILED 050.11, 1920.

Patented. July 111, 1922..

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GRIPPING DEVICE.

APPLICATION FILED 050.17. 1920.

Patented Jilly H, 1922.

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GRIPPING DEVICE.

APPLICATION FLLED DECJT, 1920."

1 4122528, Patented July 111, 1922.

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To all whom it may concern:

Be it known that I, JOSEPH F MOODY, a citizen of the United States, residing at Ranger, in the county of Eastland and State of Texas, have invented'new and useful Improvements in Gripping Devices, of which the following is a specification.

This invention relates to apparatus or appliances employed in connection with well drilling machinery for gripping the casing sections, pipes, etc., as they are being raised or lowered, and the inventionhas for its object to provide a novel and improved means for holding a section while another section is being coupled or uncoupled.

The invention also has for its object to provide a means which operates automatically to grip the pipe, casing or the like in the event of the same starting to go down too fast while being run in.

Other objects and advantages of the in vention will be pointed out in the detaileddescription appearing hereinafter, and in order that the invention may be better understood, reference is had to the accompanying drawings forming a part of this specification.

In the drawings,

Figure 1 is a plan view of the apparatus; Fig. 2 is a central longitudinal section thereof; Fig. 3 is a cross-section on the line 3-3 of Fig. 1, and Fig. 4 is a horizontal sectional view on the line 44 of Fig. 2.

Referring specifically to the drawings, the supporting frame of the apparatus is composed of laterally spaced, parallel side walls 5, and cross walls 6 connecting'the same at their ends, said side and end walls being rigidly connected inany suitable manner. This frame is supported on cross beams 7 at the top of the usual cellar 8 beneath the floor 9 of the derrick, and it is fastened down on said cross beams by hook bolts 10.

Intermediate its ends, the supporting frame carries two spaced cross members 11 and 12, the same being secured by transverse bolts 13 passing through the side walls 5, the latter also having inturned bottom Specification of lLetterslatent.

art as slips, the same being arranged in a circular series so that the pipe or casing sections may pass therethrough. The opening 17 has a downward taper and the slips 18 are slldable therein, and hence when they move downwardly in said opening they are crowded inwardly to grip the pipe or casing, whereas when they move upwardly they recede and release the latter.

The slips 18 are suspended by chains 19 or. other suitable connections, from a ring 20, and between this ring and the top of the slips is located a ring 21, the same being supported by the chains and serving to hold the slips in a circular series, Each slip is suspended from the ring 20 by a chain 19, and between said ring and the top of the sllp is located a spring 22, the latter being coiled around the chain. The ring 21 is splitand has a normal tendency to expand, whereby it holds the chains 19 spread to keep the sllps in contact at their outer surface with the wall of the opening 17 when in non-gripplng position, the slips now extending only partly into the opening. Upon lowering the slips in the opening 17 they grip the pipe or casing as hereinbefore described. The springs 22 assist the downward movement of the slips when the supporting ring 20 is lowered.

I The ring 20 is carried by two vertical and diametrically opposite supporting stems 23 passlng through openings 24 in the base 16, and connected at their lower ends, below said base, to levers 25 which are pivotally,

supported intermediate their ends by the walls 5, the arrangement being such that when the levers are swung the stems 23 move upwardly or downwardly and thus elevate or lower the ring 20 to raise or lower the slips 18. As shown in Fig. 1, the levers 25 have lateral bends 26 intermediate their ends which pass through apertures in the walls 5, whereby the pivotal support of the levers is had. The outer ends of the levers 25 have a connecting portion 27' so that they may operate together.

To the levers 25 are connected springs 28 for swmging the same in a direction to move the stems 23 downwardly to lower the ring 20 and allow the slips 18 to come to grippin position. The levers 25 are normally hel in a position in which the ring 20 is elevated and supporting the slips 18 in nongripping position. This holding means is a counterweight 29 carried by a suspension Patented July 111, 1922.

Application filed December 17,1920. Serial No. 431,443.

line 30 hungon a trigger 31 ivoted to an arm 32 extending forwardly rom the conthe line 30 to slip off, and as the levers 25 are now free of the counterweight 29, the springs 28 operate to swing the levers in a direction to allow the slips 18 to come to gripping position, It will be understood of course, that the weight 29 is heavy enough to overbalance the tension of the springs 28. The line 30 is positioned to allow the weight to drop into the cellar 8 when said line slips off the released trigger 31. The floor 9 has a hole throu h which the line 30 passes.

matically cause the pipe or, casing to be gripped by the slips 18 if it should start to go down too fast while being run in, and to accomplish this, the detent 33 is controlled by a speed-responsive device which is driven by the descending pipe or casing. This mechanism will now be described.

Between the side walls 5 are located two cross frame members 35 and 36 respectively which are spaced so as to be located on opposite sides of the plane of the opening These frame members are slidably supported by the walls 5, so that they may be moved toward and from each other, the supporting means being the flanges 14 and outstanding ribs 37 on the inner surfaces of the walls 5. The adjustment of the frame members is effected by turn-buckle rods 38. The ad justing rods 38 of the frame member 35 are carried by the cross member 11, and the adjusting rods 38 of the frame member 36 are carried by a slidable cross head 39 supported b the walls 5 between the flanges 14 and gui e ribs 40 on said walls. The last mentioned adjusting rods pass through openings in the cross member 12. The cross head 39 is backed by springs 41 positioned between the same and the adjacent end wall 6. The walls 5 support a transverse shaft 42 having a crank bend 43 behind the crosshead 39. One end of the shaft 42 has on the outside of the corresponding wall 5 a hand lever extension 44. The purpose of'the slidable cross-head 39 will be presently made clear.

The frame member 35 carries a horizontal shaft 45 on which are loosely mounted two frusto-conical rollers 46 which are corrugated circumferentially. The shaft 45 is supported inbearings 47 on the member 35. The rollers 46 are placed so that their smaller ends face each other, and on the shaft 45 are set collars 48 engageably by the outer ends of the rollers to limit the spread thereof.

On the' frame member 36 are bearings 49 supporting a shaft 50 carrying rollers 51 similar to the rollers 46 and also held adjusted by set collars 52. That portion of the shaft 50 'on which the rollers 51 are mounted is squarein cross-section so that said rollers and the shaft may rotate together.

The frame members 35' and 36 are to be adjusted by the rods 38 to locate the rollers 46 and 51 on opposite side of the pipe or casing section 53 which is to be run in, as shown in Fig. 4. The rollers will also be adjusted by the set collars 48 and 52 according to the diameter of the part 53 so as to properly engage the same. If now the pipe or casing section 53 is lowered, its frictional engagement with the rollers 46 and 51 will cause the latter to rotate, and the shaft 50 A to turn. It is the o ject of the invention to auto- The shaft 50 is geared to a centrifugal governor, andthe latter controls a drum 54 on which is adapted to be 'wound a line 55 which is connected to the detent 33'to tripv the same and release the trigger 31 so that the weight 29 may drop and allow the levers 25 to swing to lower the slips 18 to gripping position as hereinbefore described. The governor consists of the following parts:

The frame member 36 supports an up- I right tubular shaft 56 through which passes a shaft 57 carrying the drum 54. On shaft 56 is a bevel gear 58 which is in mesh with V a bevel gear 59' on a shaft 60 having a pinion 61 which is in mesh with a spur gear 62 on the shaft 50, whereby the motion of the latter shaft is transmitted to the shaft 56. .The drum shaft 57 projects from the top of shaft 56 and is her'e fitted with two cooperating clutch members 63 and 64, the

former being fast on the drum shaft and the latter loose and slidable on said shaft. The supporting arms 65 of the governor balls 66 are pivoted to the slidable clutch mem-- ber 64 and connected by links 67 to the shaft 56. The outward movement of the governor balls 66, in response to an increase in speed of the shaft 56 driven by shaft 50, causes the clutch member 64 to slide down and engage clutch member 63, and as the clutch member 64 also rotates owing to the connections 67 between the arms 65 and the shaft 56,-the shaft 57 now turns in a direction to wind the line on the drum 54, thereby tripping the latch 33. The slips 18. immediately descend and grip the descending pipe or casing 53 and stop the same.

As the frame member 36 is held pressed forwardl by the springs 41 it can yield to" permit the passage of coupling sleeves or collars on the pipe or casing 53.

The rollers 46 and 51 can also be used for gripping the pipe or casing 53 when a sec- 126 tion above the same is to be screwed on or memes materially assisting the gripping action. The

cross head 39 is advanced as stated by rocking the shaft 42 in a direction to cause its crank ortion 43 to force the cross head forwar l the shaft being operated'in this manner by the hand lever 44. The wall 5 carries a stop abutment 68 for the hand lever 44' to prevent the latter from being swung over far'enough to back the crank away from the cross head 39 Associated with the gripping mechanism hereinbefore described is a turn-table69 for rotating the pipe or casing section to be a-trigger carried by the lever "and supporting the suspension means, a detent engageable with the trigger for holding the same in position to support the suspension means, and a speed responsive means for disengaging the detent from the trigger.

5. In a well-drilling appliance, work gripping means, a support for said gripping means movable to place the same in operative and inoperative positions, a lever for operating said support, a spring for swinging the lever in a direction to move the support in a direction to place the gripping means screwed on or unscrewed. The turn-table\in operative position, a counterweight op- 69 is mounted on a bed plate 70 seating on the base member 16, said bed plate having an upstanding hub 71 on which the turntable rotates. The turn-table has the usual annular rack 72 for engagement by a drive L driven from any suitable power source. The

upper end of the hub 71 carries a retaining plate 76 fitting over the top of the turntable 69. The central opening in the turntable hub 71 is in alinement with the opening 17 and stems 23 pass therethrough.

Any suitable means may be provided for making the pipe or casing section to be rotated st to the turn-table 69. The drawing ShOWlS a bail 77 which is to be swung up and snubbed to said section. When not in use, the bail 77 is dropped to seat'ofi top of the turn-table as shown in Fig. 1, clear of the work and the slips.

Upward movement of the slips 18 is limited by chains 78 connected to their lower ends and fastened to the base member 16.

I claim:

1. In a well-drilling appliance, a work gripping means, and means controlled by speed of descentof the work for placing the grlpping means in operative position. v

2. In a well-drilling appliance a work gripping means whose actuation is controlled by the speed of descent of the work.

3. In a well-drilling appliance, a work gripping means, rollers engageable with the work and rotatable by the descent thereof,a governor driven of the rollers, means controlled by the governor for holding the gripping means in inoperative position, and means for placing the gripping means in operative position upon release of the holding means.

4. In a well-drilling appliance, work gripping means, a support for said gripping means movable to place the same in operative and inoperative positions, a lever for operating said support, a spring for swinging the lever. in adirection to move the supweight opposing the action of the spring,

a suspension means for the counterweight,

posing the action of the spring, a suspension means for the counterweight, a trigger carried by the lever and supporting the suspension means, a detent engageable with the trigger for holding the same in position to support. the suspension means, and means controlled by the speed of descent of the work for disengaging the detent from the trigger.

6. In a well-drilling appliance, work gripping means, a support for said gripping means movable to place the same in operative and inoperative positions, a lever for operating said support, a spring for swinging the lever in a direction to move the support in a direction to place the gripping means in operative position, a counterweight opposing the action of the spring, a suspension means for the counterweight, a trigger carried by the lever and supporting the suspension means, a detent engageable with the trigger for holding the same in osition to support the suspension means, rolls engageable with the work and rotatable by the descent there- 'of, a governor driven by the rollers, and

means in operative position, a counterweight opposing the action of the spring, a suspension means for the counterweight, a trigger carried by the lever and supporting the suspension means, a detent engageable with the trigger for holding the same in position to support the suspension means, rollers engageable with the work and rotatable by the descent thereof, a governor driven by the rollers, a winding drum driven by the governor, and detent disengaging line connected to the drum.

8. In a well-drilling appliance, a work gripping means, a pair of rollers engageable with one side of the work, a second pair of rollers engageable with the opposite side of the work, a governor driven by the second pair of rollers, means controlled by the governor for holding the grippin means in anoperative position, and means or placing the gripping means in operative position upon release of the holding means.

9. In a well-drilling appliance, a Work gripping means, a pair of rollers engageable with one side of the work, a second pair of, rollers engageable with the opposite side of the work, said pairs of rollers being adjustable toward and from each other a governor driven by the second pair of rollers, means controlled by the governor for holding the gripping means in inoperative position, and means for placing the gripping means in operative position upon release of the holding means.

10. In a well-drilling appliance, a work gripping means, a pair of rollers engageable with one side of the work, a second pair of rollers engageable with the opposite side of the work, said rollers being cone-shaped with their smaller ends facing each other, a governor driven by the second pair of rollers, means controlled by the governor for holding the gripping means in inoperative position, and means for placing the gripping means in operative position upon release of the holding means.

11. In a well-drilling appliance, a work gripping means, a pair of rollers engageable with one side of the work,-a second pair of rollers engageable with the opposite side of the work, said rollers being cone-shaped with their smaller ends facing each other, shafts supporting the rollers, and on which they with one side of the work, a second pair of rollers engageable with the opposite side of the work, said rollers being cone-shaped with their smaller ends facing each other, shafts supporting the rollers, and on which the are longitudinall adjustable, said roller sliafts being adjusta le toward and from each other, a governor drive-n by the second pair of rollers, means controlled by the governor for holding the gripping means in inoperative position, and means for placing the gripping means in operative position upon release of the holding means.

13. In a well-drilling appliance, 'a work gripping means, a pair of rollers engageable with one side of the work, a second pair of rollers engageable with the opposite side of the work, a governor driven by the second pair of rollers, means controlled by the governor for holding the gripping means in inoperative position, means for placing the gripping means in operative position upon release of the holding means, and means for placing the rollers in gripping engagement with the work to prevent rotation thereof.

In testimony whereof I afiix m signature.

JOSEPH F. OODY.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5203408 *Dec 2, 1991Apr 20, 1993Frontier Oilfield Sales Ltd.Tool saver
US6264395Jun 19, 2000Jul 24, 2001Jerry P. AllamonSlips for drill pipe or other tubular goods
US6471439Jan 8, 2002Oct 29, 2002Jerry P. AllamonSlips for drill pipes or other tubular members
Classifications
U.S. Classification166/53, 173/179, 403/369, 188/67, 175/24
International ClassificationE21B19/10, E21B19/00
Cooperative ClassificationE21B19/10
European ClassificationE21B19/10