| Patent |
Priority |
Assignee |
Title |
| 2040889, |
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| 2160228, |
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| 2223602, |
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| 2230447, |
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| 2286126, |
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| 2331532, |
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| 2376605, |
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| 2555627, |
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| 2589506, |
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| 2593520, |
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| 2616502, |
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| 2640546, |
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| 2713910, |
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| 2714932, |
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| 2737242, |
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| 2756827, |
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| 2830666, |
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| 2833354, |
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| 3013612, |
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| 3054453, |
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| 3062296, |
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| 3082824, |
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| 3160209, |
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| 3163225, |
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| 3273588, |
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| 3282342, |
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| 3291218, |
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| 3298437, |
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| 3298440, |
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| 3306362, |
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| 3308895, |
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| 3356140, |
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| 3393743, |
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| 3429375, |
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| 3517742, |
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| 3554280, |
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| 3602305, |
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| 3623551, |
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| 3687202, |
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| 3787101, |
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| 3818987, |
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| 3851706, |
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| 3860066, |
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| 3926253, |
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| 4035024, |
Dec 15 1975 |
Jarva, Inc. |
Hard rock trench cutting machine |
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Jan 09 1973 |
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Check valve assembly |
| 4134455, |
Jun 14 1977 |
Dresser Industries, Inc. |
Oilwell tubing tester with trapped valve seal |
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Dec 12 1977 |
Halliburton Company |
EZ disposal packer |
| 4185689, |
Sep 05 1978 |
Halliburton Company |
Casing bridge plug with push-out pressure equalizer valve |
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Jul 23 1977 |
Gebr. Eickhoff, Maschinenfabrik und Eisengiesserei m.b.H. |
Mining machine with cutter drums and sensing apparatus |
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Apr 18 1977 |
PIPE RECOVERY SYSTEMS, INC |
Chemical cutting apparatus |
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Jun 12 1980 |
RICHARDSON, CHARLES |
Method and apparatus for well treating |
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Nov 21 1980 |
ROBBINS COMPANY, THE |
Raise bit with cutters stepped in a spiral and flywheel |
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Nov 27 1981 |
Dresser Industries, Inc. |
Quick release downhole motor coupling |
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Oct 02 1981 |
Baker International Corporation |
Positive locating expendable plug |
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Nov 09 1981 |
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Apparatus for releasably bridging a well |
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Jun 07 1982 |
Baker Oil Tools, Inc. |
Apparatus for well cementing through a tubular member |
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Jun 03 1981 |
Baker International Corporation |
Combination release mechanism for downhole well apparatus |
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May 17 1982 |
Baker Oil Tools, Inc. |
Flapper type safety valve for subterranean wells |
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Mar 24 1983 |
DRESSER INDUSTRIES, INC , A CORP OF DE |
Hydraulic setting tool |
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Aug 17 1983 |
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Well casing float shoe or collar |
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Dec 06 1983 |
ATLAS COPCO ROBBINS INC |
Mobile mining machine and method |
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Aug 01 1983 |
Hughes Tool Company |
Tubing pressurized firing apparatus for a tubing conveyed perforating gun |
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Oct 19 1983 |
Compagnie Francaise des Petroles |
Production tubes for use in the completion of an oil well |
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Aug 29 1984 |
CAMCO INTERNATIONAL INC , A CORP OF DE |
Method and apparatus for stopping well production |
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Mar 15 1983 |
Metalurgica Industrial Mecanica S.A. |
Reperforable bridge plug |
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Sep 04 1985 |
Hydra-Shield Manufacturing Co. |
Coupling for fire hydrant-fire hose connection |
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Jul 25 1986 |
CAMCO INTERNATIONAL INC , A CORP OF DE |
Well packer with releasable head and method of releasing |
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Jan 28 1987 |
Halliburton Company |
Safety valve |
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May 17 1984 |
BJ Services Company |
Drillable well-fluid flow control tool |
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Aug 04 1986 |
Oil Patch Group Inc. |
Stabilizing tool for well drilling |
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May 22 1987 |
ENTERRA PETROLEUM EQUIPMENT GROUP, INC |
Drillable bridge plug |
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Aug 04 1986 |
Oil Patch Group, Inc. |
Method and apparatus for well drilling |
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Apr 12 1988 |
Dresser Industries, Inc. |
Setting tool for mechanical packer |
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Apr 12 1988 |
CONOCO INC , 1000 SOUTH PINE STREET, PONCA CITY, OK 74603, A CORP OF DE |
Apparatus for installing a liner within a well bore |
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Jun 08 1988 |
Tam International |
Multiple-set downhole tool and method |
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Dec 01 1988 |
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Back pressure plug tool |
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Jun 02 1989 |
VERMEER MANUFACTURING COMPANY, A CORP OF IA |
Undercut trenching machine |
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Jul 25 1990 |
Halliburton Company |
Rotary locking system with metal seals |
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Feb 15 1991 |
HALLIBURTON COMPANY, A DE CORP |
Non-rotating cementing plug with molded inserts |
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May 02 1990 |
SASSY OLIVE HOLDINGS, LLC |
Well apparatuses and anti-rotation device for well apparatuses |
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Aug 31 1989 |
UNION OIL COMPANY OF CALIFORNIA, DBA UNOCAL, A CORP OF CA |
Well casing flotation device and method |
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May 22 1990 |
BAKER HUGHES INCORPORATED, A CORP OF DE |
Valving system for hurricane plugs |
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Jun 04 1991 |
Coors Technical Ceramics Company |
Ball and seat valve |
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Jul 13 1990 |
Halliburton Company |
System containing expendible isolation valve with frangible sealing member, seat arrangement and method for use |
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Aug 12 1991 |
Halliburton Company |
Apparatus and method of anchoring and releasing from a packer |
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Sep 13 1990 |
Halliburton Energy Services, Inc |
Corebarrel |
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Mar 27 1992 |
Vermeer Manufacturing Company |
Trenching apparatus |
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Jun 21 1991 |
Halliburton Energy Services, Inc |
Downhole tool apparatus with non-metallic components and methods of drilling thereof |
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Mar 06 1992 |
Baker Hughes Incorporated; BAKER HUGHES INCORPORATED A CORPORATION OF DE |
Self-contained closure mechanism for a core barrel inner tube assembly |
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May 01 1992 |
Davis-Lynch, Inc. |
Cementing apparatus |
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Apr 09 1992 |
Halliburton Company |
Hostile environment packer system |
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Jun 10 1992 |
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Rock saw |
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Jul 16 1992 |
Camco International Inc. |
Multiple use well packer |
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Mar 08 1993 |
Baski Water Instruments |
Flow and pressure control packer valve |
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Apr 03 1992 |
TIW Corporation |
Hydraulically actuated liner hanger arrangement and method |
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Nov 03 1992 |
Halliburton Company |
Apparatus and method of anchoring and releasing from a packer |
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Apr 26 1990 |
Halliburton Energy Services, Inc |
Downhole tool with sliding valve |
| 5392540, |
Jun 10 1993 |
Vermeer Manufacturing Company |
Mounting apparatus for a bridge of a trenching machine |
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May 05 1994 |
Canadian Fracmaster Ltd. |
Hydraulic disconnect |
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Sep 02 1993 |
The Sollami Company |
Insert for tungsten carbide tool |
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Jun 02 1994 |
|
Trenching system for earth surface use, as on paved streets, roads, highways and the like |
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May 16 1995 |
Halliburton Energy Services, Inc |
Downhole tool apparatus with non-metallic packer element retaining shoes |
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Jul 12 1994 |
Halliburton Company |
Well completion system with flapper control valve |
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May 04 1994 |
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Valve cage for a rod drawn positive displacement pump |
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Dec 20 1994 |
Smith International, Inc. |
Self-centering polycrystalline diamond cutting rock bit |
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Mar 29 1996 |
Halliburton Energy Services, Inc |
Downhole tool apparatus and method of limiting packer element extrusion |
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Oct 03 1996 |
ATLAS COPCO BHMT INC |
Earth-boring bit having cutter with replaceable kerf ring with contoured inserts |
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Oct 04 1996 |
Battelle Energy Alliance, LLC |
Device and method for producing a containment barrier underneath and around in-situ buried waste |
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Jul 29 1996 |
Baker Hughes Incorporated |
Liner wiper plug apparatus and method |
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Nov 25 1996 |
Halliburton Company |
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Oct 01 1996 |
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Excavation Engineering Associates, Inc. |
Shielded cutterhead with small rolling disc cutters |
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Oct 31 1997 |
Halliburton Energy Services, Inc; Halliburton Company |
Plug release indication method |
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Jan 09 1998 |
Halliburton Energy Services, Inc |
Chip resistant buttons for downhole tools having slip elements |
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Halliburton Energy Services, Inc. |
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Feb 09 1998 |
ERC Industries, Inc. |
Full bore tubing hanger system |
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Dec 09 1997 |
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Device for excavating an elongated depression in soil |
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Schlumberger Technology Corporation |
Releasable connector assembly for a perforating gun and method |
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Jun 29 1998 |
Baker Hughes Incorporated |
Diamond enhanced insert for rolling cutter bit |
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Halliburton Energy Services, Inc |
Hydraulic setting tool |
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Sep 08 1998 |
Halliburton Energy Services, Inc |
Underbalanced well completion |
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May 08 1998 |
Baker Hughes Incorporated |
Removable non-metallic bridge plug or packer |
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Jul 14 1998 |
Baker Hughes Incorporated |
Multi-port cementing head |
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Feb 16 1999 |
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Halliburton Energy Service,s Inc. |
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BJ Services Company |
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Liner hanger running tool and method |
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Compagnie Du Sol |
Drum for an excavator that can be used in particular for the production of vertical trenches in hard or very hard soils |
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Wells Fargo Bank, National Association |
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Wells Fargo Bank, National Association |
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Utility trenching and sidewalk system |
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