US1356458A

US1356458A - Gripping device

Info

Publication number: US1356458A
Application number: US295940A
Authority: US
Inventors: Joseph F Moody
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-05-09
Filing date: 1919-05-09
Publication date: 1920-10-19
Anticipated expiration: 1937-10-19

Description

. J. f. MOODY. GRPPING DEVICE. Arrucmon mso MAQ 9, |919.

1,356,458, Pgnwd oet. 19,1920.

2 SHEETS-SHEET l.

i ,To all whom it may concern:

.citizen of the United States, residin UNITED STATES PATENT OFFICE.

JOSEPH r. moonY, o F AUGUSTA, masas.

GRIFFIN@ DEVICE.

Be it known that I, Jesi-:PH

the present application for patent is designed for gripping oil or other well cas- .ing's, pipes, etc., las they .are being raised or lowered, and its object is to provide a simple and highly eicient device of this character, f

^ the .same consisting in a novel combination vand arrangement of parts to be hereinafter described and claimed.

In order that the invention may befbetter understood, 'reference is had to the accompanying "drawings forming a part of this specification, and in said drawings,

Figure 1 is an elevation of the invention, partly in section; I "F ig. 2 is a horizontal section on the line 2--2 of Fig. 1;

F ig. 8 `is a-view similar to Fig. 1 showing a modification, and i F ig. 4 is a cross section of Fig. 3 with parts in elevation.

Referring specifically tothe drawings, 5

denotes a support or base block having a.

vertical opening 6 in which seats a series of wedge shaped gripping jaws 7 commonly known in the art as slips, the sameV being arranged in a circular series through which the well casing C extends. The opening 6 has a downward taper and the slips 7 are slidable therein, and hence when they move downwardly in the opening they are crowded inwardly to grip the casing C or other part to be operated on, and when they move upwardly they recede and release the same. The innerfaces of the slips are serrated to obtain a\firm grip on the casing or other art. I i

To facilitate the manipulation of the slips 7, they are suspended by chains or other suitable flexible connections 8 from a ring.9

vcarried bya lever 10 which is fulcrumed at 11 on a swingingr support 12 pivotedat 13 to the base 5. The end of the. lever 10 carrying the ring 9 is forked, as shown at 14, to straddlethe latter, and the fork branches are pivoted to the ring as 'shown at 15. The ventire set' of slips can therefore be simultaneously elevated v,to release the cas- The-upward movement of the slips Specicationof Letters Patent.

Patented Oct. 19, 1920.

Application mea my a, ma. serial mi. 295,940.

is limited by chains 16 connected to the bottom thereof and anchored to the bottom of the base 5.

The slips 7 are also fiexibly connected in a circular series by a spring or other suitable flexible means 17. Each slip has a horizontal transverse opening 18 from one slide edgeto theother, and the openings of the slips are in alinement or registry'to produce a continuousoi` annular opening through the'series, in which latter the spring 17 seats, the sprin' being in annular .form and having .a ten ency to crowd the slips inwardly to grip the casing C. The sprin holds the slips snugly around the casing and also prevents them from slipping unevenly v'from one casing section to another when they are released. It will be under stood however, that the tension of the spring is not great enough to cause the slips to grip the casing whenthey are elevated, s0 as not to interfere withthe movement of casing throughthe series of slips.

The device is shown supported on sil blocks' 19 located on the floor of the usual cellar beneath fioor 2() of the derrick.

vTo the outer end ofthe lever 1() is pivotally connected, as shown at 2l, a link 22 which extends upwardly to the derrick floor 20 and through a slot 23 therein. Byimeans of. this link the lever 10 may be swung to elevateor lower the -slips 7 as hereinbefore described.' The upper end of the link 22 hasa handhold- 24 to facilitate .its operaf remain in theposition it was place to elevate the slips.

A downward movement of the link 22 swingsl the lever 10 to elevate the slips, and it is held down by the dog 26, and upon releasing the lattierVthe link is released to allow the lever to swing to lower the .ring 9, whereupon the slips descend to grip the part C.

The dog 26 is pivoted at 27 to asupport 28 mounted on the derrick floor 20, said support having spaced parts 29 between which the dog seats and between which the upper end of the link 22 extends.

The slips 7 may also be controlled from the'under side of the base 5 as shown in Figs. 3 and4. Here the base has two dia- Inetrically opposite vertical holes in which rods 30 are slidably mounted, said rods supupper ends, above the base.

lower ends of the rode, beneath the base 5,; and it is pivoted to a swin ing support 31 onv the bottom of thebase. .his structure enables the device to be supported/on the derrick floor 2U.

In `the to i of the base 5 may be a recess 32 to seatvtlie ring`9 when it is down so as to leave the top of the latter free of obstructions whicli might interfere with elevators or other appliances attached to the casing C above the ring.

'lhe device provides a handy and safe device for running in and pulling out wellcasing or other parts of the well, it can be easily handled, and it is out of the way so as not to interfere with other operations. If

the hoisting line or the derrick givesaway,

while the slips 7 are up, they can be instantly lowered to grip the casing or other pait by kicking' the link 22 away from-the ing, aseries of slips iexibly connected ina' circular series and adapted to enter the and lower the same elevate and lower dogv 2G, which releases the lever l() andallows the ring' to lower thc slips 7 to grip the casing. ll hei] lowering casingf sections, the section below a coupling collar can be 2f fripped .to allow tightening of the collar if it is loose, which is sometimes the case. The device can be easily controlled by the. driller or other person handling the machinery by which the casing or pipe is being elevated or lowered. The drawings show the base 5 provided with foiirslips 7, but their number 1s immaterial and may be varied desired. I claim: l. A gripping device comprising a base havingA a downwardly taperedvcrtical openp the slips. y

r2. A gripping device comprising a base having a downwardly tapered vertical opening, a series. of slips flexibly connected in a circular series and adapted to enter the open-y ing in the base, a supporting member above the slips, flexible suspension means connecting the slips to said member, and' means carrying the suppoiting member and operable to raise and lower the same to 'elevate and lower the slips.

3. A gripping device comprising a base having a downwardly tapered vertical opening a' circular series of slips adapted to enter the opening in, the base, a resilient member connecting the slips to contract the same, a supporting member carrying` the slips, 'and means carrying the supporting same to elevate and lower lthe slips.

4. A gripping devicecomprising a base having a downwardly tapered vert-ical opening, van annular supporting memberposimember andoperable to raise and lower the.

tioned above the base, a series of 'flexibly' connected slips suspendedfrom the supportin?,r member and adapted to entertheaforesaid opening when said member is lowered,

and raising and lowering means for the sup-` porting member. i

l In testimony whereof I affix niv swnatu re.

JOSEPH r. Mooor.