Assignee
WEATHERFORD US INC
US·42 granted patents·2,158 citations·filing 1984–1996
Top patents by PatentIndex Score
42 records- 0192US4984633ANozzle effect protectors, centralizers, and stabilizers and related methodsWEATHERFORD US INC·Filed 1989·Granted Jan 15, 1991·125 cites·13 claims
- 0292US4589495AApparatus and method for inserting flow control means into a well casingWEATHERFORD US INC·Filed 1984·Granted May 20, 1986·126 cites·18 claims
- 0387US5577566AReleasing toolWEATHERFORD US INC·Filed 1995·Granted Nov 26, 1996·133 cites·10 claims
- 0487US5553667ACementing systemWEATHERFORD US INC·Filed 1995·Granted Sep 10, 1996·97 cites·20 claims
- 0587US5464062AMetal-to-metal sealable portWEATHERFORD US INC·Filed 1994·Granted Nov 7, 1995·88 cites·4 claims
- 0687US4758135APump headWEATHERFORD US INC·Filed 1986·Granted Jul 19, 1988·59 cites·6 claims
- 0784US5409060AWellbore tool orientationWEATHERFORD US INC·Filed 1994·Granted Apr 25, 1995·70 cites·19 claims
- 0884US5341873AMethod and apparatus for deviated drillingWEATHERFORD US INC·Filed 1992·Granted Aug 30, 1994·84 cites·22 claims
- 0984US5113940AWell apparatuses and anti-rotation device for well apparatusesWEATHERFORD US INC·Filed 1991·Granted May 19, 1992·87 cites·10 claims
- 1083US5575333ACentralizerWEATHERFORD US INC·Filed 1995·Granted Nov 19, 1996·122 cites·16 claims
- 1181US5411049AValveWEATHERFORD US INC·Filed 1994·Granted May 2, 1995·48 cites·10 claims
- 1278US5025858AWell apparatuses and anti-rotation device for well apparatusesWEATHERFORD US INC·Filed 1990·Granted Jun 25, 1991·69 cites·22 claims
- 1378US4794986AReticulated centralizing apparatusWEATHERFORD US INC·Filed 1987·Granted Jan 3, 1989·56 cites·11 claims
- 1476US5452759AWhipstock systemWEATHERFORD US INC·Filed 1993·Granted Sep 26, 1995·53 cites·15 claims
- 1576US5081888AApparatus for connecting and disconnecting threaded membersWEATHERFORD US INC·Filed 1989·Granted Jan 21, 1992·54 cites·22 claims
- 1675US5425417AWellbore tool setting systemWEATHERFORD US INC·Filed 1994·Granted Jun 20, 1995·57 cites·14 claims
- 1774US5245877ATong load cell assemblyWEATHERFORD US INC·Filed 1991·Granted Sep 21, 1993·61 cites·9 claims
- 1874US5044232AActive jaw for a power tongWEATHERFORD US INC·Filed 1989·Granted Sep 3, 1991·50 cites·7 claims
- 1974US4842062AHydraulic lock alleviation device, well cementing stage tool, and related methodsWEATHERFORD US INC·Filed 1988·Granted Jun 27, 1989·52 cites·28 claims
- 2071US4895056ATong and belt apparatus for a tongWEATHERFORD US INC·Filed 1988·Granted Jan 23, 1990·45 cites·19 claims
- 2171US4706747ACementing plugWEATHERFORD US INC·Filed 1985·Granted Nov 17, 1987·45 cites·3 claims
- 2269US5368098AStage toolWEATHERFORD US INC·Filed 1993·Granted Nov 29, 1994·38 cites·17 claims
- 2369US5318115ACasing cutting and retrieving toolWEATHERFORD US INC·Filed 1993·Granted Jun 7, 1994·66 cites·7 claims
- 2467US4979562AFloat equipment including float collars and modular plugs for well operationsWEATHERFORD US INC·Filed 1988·Granted Dec 25, 1990·39 cites·3 claims
- 2567US4787458ASpring bow, centralizer, and related methodsWEATHERFORD US INC·Filed 1987·Granted Nov 29, 1988·52 cites·15 claims
- 2665US5429187AMilling tool and operationsWEATHERFORD US INC·Filed 1994·Granted Jul 4, 1995·51 cites·11 claims
- 2758US4688453AApparatus for making and braking connections between screw threaded tubular membersWEATHERFORD US INC·Filed 1986·Granted Aug 25, 1987·31 cites·2 claims
- 2857US4756365ACementing plugWEATHERFORD US INC·Filed 1986·Granted Jul 12, 1988·27 cites·2 claims
- 2954US5584350AWellbore sidetracking methodsWEATHERFORD US INC·Filed 1995·Granted Dec 17, 1996·33 cites·9 claims
- 3054US4625762AAuto-fill flow valveWEATHERFORD US INC·Filed 1985·Granted Dec 2, 1986·25 cites·13 claims
- 3153US5626189AWellbore milling tools and insertsWEATHERFORD US INC·Filed 1995·Granted May 6, 1997·35 cites·6 claims
- 3253US4711301AValve assembly for inflatable packerWEATHERFORD US INC·Filed 1985·Granted Dec 8, 1987·26 cites·33 claims
- 3350US5720349AStarting mill and operationsWEATHERFORD US INC·Filed 1995·Granted Feb 24, 1998·25 cites·19 claims
- 3450US5522461AMill valveWEATHERFORD US INC·Filed 1995·Granted Jun 4, 1996·22 cites·15 claims
- 3549US5620051AWhipstockWEATHERFORD US INC·Filed 1996·Granted Apr 15, 1997·21 cites·20 claims
- 3647US4785588ALiquid blasting systemWEATHERFORD US INC·Filed 1986·Granted Nov 22, 1988·11 cites·4 claims
- 3745US5531271AWhipstock side supportWEATHERFORD US INC·Filed 1995·Granted Jul 2, 1996·22 cites·5 claims
- 3839US5095929ARail tank car cleaning systemWEATHERFORD US INC·Filed 1990·Granted Mar 17, 1992·9 cites·21 claims
- 3939US4759504ADump control and valveWEATHERFORD US INC·Filed 1986·Granted Jul 26, 1988·10 cites·7 claims
- 4036US5642787ASection millingWEATHERFORD US INC·Filed 1995·Granted Jul 1, 1997·14 cites·16 claims
- 4136US4774860ATong and belt apparatus for a tongWEATHERFORD US INC·Filed 1986·Granted Oct 4, 1988·13 cites·17 claims
- 4231US4728041AFluid spray apparatusWEATHERFORD US INC·Filed 1987·Granted Mar 1, 1988·7 cites·19 claims
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