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Publication numberUS1802565 A
Publication typeGrant
Publication dateApr 28, 1931
Filing dateJul 22, 1929
Priority dateJul 22, 1929
Publication numberUS 1802565 A, US 1802565A, US-A-1802565, US1802565 A, US1802565A
InventorsLacey Joseph S
Original AssigneeLacey Joseph S
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pipe retainer for oil wells
US 1802565 A
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Description  (OCR text may contain errors)

p l 23, 1931- J. s. LACEY 1,802,565

PIPE RETAINER FOR OIL WELLS Filed July 22, 1929 INVENTOR Jstpu S. Lnc: X

Patented Apr. 28, 1931 UNITED STATES JOSEPH S. LACE'Y, LONG BEACH, CALIFORNIA PIPE RETAINER FOR OIL WELLS Application .filed July 22,

This invention relates to a pipe retainer for oil Wells which is adapted to hold the pipe, .kelly or the like after it has been severed. This device is particularly useful when used in conjunction with a hydraulic pipe cutter and gate such as is illustrated in my co-pending application, Serial Number 366.961. If a well should accidentally blow in before the drillers are ready, a serious problem is presented, because the drill pipe, kelly or other tools are usually still in the hole. In order to completely shut off the well, it is then necessary to cut the casing, the cutting knives also form the gate. If the severed pipe should fall into the hole, serii ous damage'to the well would result, an

therefore I have devised a pipe retainer p against the; pipe as they are lowered by means which will effectively hold the pipe against dropping into the well after the upper portion thereof has been severed by the knives.

Another object of my invention is to provide a pipe retainer which is simple in operation, which can be quickly and effectively applied and which is operated by any available fiuidunder pressure.

The figure in the drawing is a longitudinal sectional view of my pipe retainer positioned on a pipe cutter;

Referring more particularly to the draw- Qing, the numeral 1 indicates a pipe cutter preferablyof the hydraulic type which includes a pair of cylinders 2-3 in which are,

positioned pistons. 4=5 respectively, and

horiaontally extending lmives 6-7 are se- 5 cured to. the pistons 4-5 respectively. The

knives 6-7 are adapted to extend across the central bore 8 of the pipe severing appliance for the purpose of cutting the drill pipe,

kell a 'cable, etc. The cylinders 4-5 are pre erably hydraulically operated so that ample force is available to sever the pipe.

A flange 9 is formed on the bottom of the pipe cutter 1 and my pipe retainer 10 is provided with a flange 11 on the top thereof which fits against the flange 9 and both of these flanges are then bolted or otherwise suitably secured together. The pipe retainer 10 comprises a body 12 which may be provided with a threaded section 13 on the bottom thereof for the purpose of securing the 1929. Serial No. 380,238.

pipe retainer and the pipe cutter to the casing. It is evident that a flanged joint or any other suitably secured means may be used instead of the threads 13. The central bore 14 of the pipe retainer coincides with the bore 8 of the pipe cutter so that a clear and straight passage is provided through which the pipe, tools or the like can readily pass. The body 12 is provided with a pair of opposed recesses 15-16 in which I position slips 17-18 respectively. The slips 17-18 are provided with toothed or serrated surfaces for the purpose of engaging the pipe or the like. The recesses 15-16 are each provided with a downwardly inclined wall 19 against" which the slips rest. This wall is so inolifnedthat-the slips are directed inwardly to be further described.

A cylinder 20-21 is secured to the body 12 over the recesses 15-16 respectively and these cylinders are provided with a piston 22-23 respectively. A rod 2 i-25 depends from the piston 22-23 respectively and are pivotally secured to the sli s 17-18 respectively -A coil spring 26-2 is positioned in the cylinder 2 0-21 respectively, will bear against the pistons 22-23 for the purpose of holding the slips 17 or 18 in their raised position so that they are out of the way of thedrill pipe or tools. A nipple 28-29 ex tendsinto the cylinder 20-21 respectively 4 for the purpose of admitting a fluid under pressure, which fluid forces the pistons 22 or 23 downwardly, and thus will cause the slips'17-18 to engage the pi e, tools or the like and prevent them from alling into the well.

When the pressure is relieved from the cylinder 20 or 21, the springs 26 or 27 will return the slips 17-18 to'their normal raised position, and the central bore will be clear for the passage of the pipe or tools. Relief ports 30-31 are provided in theicylinders 20-21 respectively adjacent the lower end thereof, for the purpose of relieving the pressure in said cylinder after the piston has moved below the ports, and by this means the inward movement of the slips 17-18 is limited.

A by-pass 32 is provided below the slips 17-18for the purpose of conducting the fluid away from the well after the knives 67 have been closed and the well has been shut OH". It is understood that a suitable gate valve (not shown) is provided in the by-pass 32 so that the fluid can be controlled therethrough.. I I

Having described my invention, I claim:

10 1. A pipe retainer for oil wells comprising a body having a central bore therein, a plurality of slips adjacent said bore, and hydraulically actuated means secured to said slips, said means being adapted and arranged to force the slips inwardly into said bore.

2. A pipe retainer for oil wells comprising a body having a central bore therein, a plurality of slips adjacent said bore, hydraulic cylinders secured to said body, pistons in said cylinders, rods extending from the pistons to the slips whereby said slips are moved inwardly into the bore to engage the pipe.

3. In combination with a pipe cutter, a pipe retainer means to secure said pipe re- 95 tainer to the pipe cutter, said pipe retainer having a central bore therein and a pair of recesses adjacent said bore,'slips positioned in said recesses, a hydraulic cylinder secured to thepipe cutter over said recesses, a piston in the cylinder, a rod extending from the piston and pivotally secured to the slip whereby the slip is moved inwardly into the central core.

4;. In combination with a pipe cutter, a

pipe retainer means to secure said pipe retainer to the pipe cutter, said pipe retainer having a central bore therein and a pair of recesses "adjacent said. bore, slips positioned in said recesses, a hydraulic cylinder secured to the pipe cutter over said recesses, a piston in the cylinder, a rod extending from the piston and pivotally secured to the slip whereby the slip is moved inwardly into the central bore, and a spring in the cylinder en gaging said piston whereby the slips are held in retracted position.

In testimony whereof I aifix my signature.

JOSEPH S. LACEY,

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2502803 *Nov 28, 1945Apr 4, 1950Sorensen Lee SOil saver and drilling control
US2728373 *Jul 22, 1952Dec 27, 1955Reisholz Stahl & RoehrenwerkProcess for expanding preheated tubular bodies
US2889885 *Oct 25, 1955Jun 9, 1959Jersey Prod Res CoUnderwater control of wild wells
US2897895 *Mar 30, 1956Aug 4, 1959Jersey Prod Res CoBlowout closure device pressure head
US2919111 *Dec 30, 1955Dec 29, 1959California Research CorpShearing device and method for use in well drilling
US2989294 *May 10, 1956Jun 20, 1961Alfred M CokerMethod and apparatus for developing oil fields using tunnels
US3379255 *Jul 28, 1966Apr 23, 1968Bowen Tools IncCutoff assembly for use at wellheads
US3438653 *Oct 14, 1966Apr 15, 1969Rockwell Mfg CoWellhead
US4043389 *Mar 29, 1976Aug 23, 1977Continental Oil CompanyRam-shear and slip device for well pipe
US4313496 *Apr 22, 1980Feb 2, 1982Cameron Iron Works, Inc.Wellhead shearing apparatus
US4325404 *Aug 22, 1979Apr 20, 1982Larsen Peder MValve claw to be situated at the end of a pipe to mount a closing valve
US4987956 *Aug 30, 1989Jan 29, 1991Asger HansenApparatus for use in drilling a well at an offshore location
US5203408 *Dec 2, 1991Apr 20, 1993Frontier Oilfield Sales Ltd.Tool saver
US6543546 *Jun 13, 2002Apr 8, 2003Baker Hughes IncorporatedSafety slip ram
US7036578 *Apr 25, 2003May 2, 2006Halliburton Energy Services, Inc.Tubing guide and coiled tubing injector
EP0742343A2 *May 10, 1996Nov 13, 1996Piper Oilfield Products, Inc.Hydraulic tubing head assembly
Classifications
U.S. Classification83/461, 137/560, 166/95.1, 166/55, 251/1.1, 166/75.14
International ClassificationE21B33/04, E21B33/03, E21B29/00
Cooperative ClassificationE21B33/0422, E21B29/00
European ClassificationE21B33/04M, E21B29/00