Assignee
DOWELL SCHLUMBERGER INC
US·119 granted patents·7,061 citations·filing 1980–1996
Top patents by PatentIndex Score
119 records- 0198US5330005AControl of particulate flowback in subterranean wellsDOWELL SCHLUMBERGER INC·Filed 1993·Granted Jul 19, 1994·531 cites·22 claims
- 0297US4801389AHigh temperature guar-based fracturing fluidDOWELL SCHLUMBERGER INC·Filed 1987·Granted Jan 31, 1989·142 cites·20 claims
- 0397US4695389AAqueous gelling and/or foaming agents for aqueous acids and methods of using the sameDOWELL SCHLUMBERGER INC·Filed 1986·Granted Sep 22, 1987·199 cites·13 claims
- 0496US4734259AMixtures of α,β-unsaturated aldehides and surface active agents used as corrosion inhibitors in aqueous fluidsDOWELL SCHLUMBERGER INC·Filed 1985·Granted Mar 29, 1988·76 cites·30 claims
- 0596US4683068AFracturing of subterranean formationsDOWELL SCHLUMBERGER INC·Filed 1984·Granted Jul 28, 1987·161 cites·22 claims
- 0696US4657081AHydraulic fracturing method using delayed crosslinker compositionDOWELL SCHLUMBERGER INC·Filed 1986·Granted Apr 14, 1987·143 cites·5 claims
- 0795US4940095ADeployment/retrieval method and apparatus for well tools used with coiled tubingDOWELL SCHLUMBERGER INC·Filed 1989·Granted Jul 10, 1990·186 cites·5 claims
- 0895US4733729AMatched particle/liquid density well packing techniqueDOWELL SCHLUMBERGER INC·Filed 1987·Granted Mar 29, 1988·178 cites·25 claims
- 0995US4686052AStabilized fracture fluid and crosslinker thereforDOWELL SCHLUMBERGER INC·Filed 1985·Granted Aug 11, 1987·150 cites·17 claims
- 1095US4669541AStage cementing apparatusDOWELL SCHLUMBERGER INC·Filed 1985·Granted Jun 2, 1987·180 cites·23 claims
- 1195US4644974AChoke flow beanDOWELL SCHLUMBERGER INC·Filed 1984·Granted Feb 24, 1987·112 cites·2 claims
- 1294US4591447AAqueous gelling and/or foaming agents for aqueous acids and methods of using the sameDOWELL SCHLUMBERGER INC·Filed 1984·Granted May 27, 1986·83 cites·7 claims
- 1393US5445223ADelayed borate crosslinked fracturing fluid having increased temperature rangeDOWELL SCHLUMBERGER INC·Filed 1994·Granted Aug 29, 1995·108 cites·5 claims
- 1493US5046856AApparatus and method for mixing fluidsDOWELL SCHLUMBERGER INC·Filed 1989·Granted Sep 10, 1991·94 cites·12 claims
- 1593US4802534AMethod and device for manipulating ferrofluids for use in cementing wellsDOWELL SCHLUMBERGER INC·Filed 1987·Granted Feb 7, 1989·56 cites·20 claims
- 1693US4796701APyrolytic carbon coating of media improves gravel packing and fracturing capabilitiesDOWELL SCHLUMBERGER INC·Filed 1987·Granted Jan 10, 1989·170 cites·12 claims
- 1793US4721160AComposition for a lightweight cement slurry for cementing oil and gas wellsDOWELL SCHLUMBERGER INC·Filed 1985·Granted Jan 26, 1988·162 cites·16 claims
- 1892US4705459AMethod of observing the pumping characteristics of a positive displacement pumpDOWELL SCHLUMBERGER INC·Filed 1985·Granted Nov 10, 1987·111 cites·9 claims
- 1991US4969523AMethod for gravel packing a wellDOWELL SCHLUMBERGER INC·Filed 1989·Granted Nov 13, 1990·131 cites·11 claims
- 2091US4850430AMatched particle/liquid density well packing techniqueDOWELL SCHLUMBERGER INC·Filed 1987·Granted Jul 25, 1989·119 cites·20 claims
- 2190US5230363ASuction valve for high pressure slurry pumpDOWELL SCHLUMBERGER INC·Filed 1991·Granted Jul 27, 1993·84 cites·4 claims
- 2290US5120471AProcess and composition for protecting chrome steelDOWELL SCHLUMBERGER INC·Filed 1990·Granted Jun 9, 1992·73 cites·12 claims
- 2390US4919209AMethod for treating subterranean formationsDOWELL SCHLUMBERGER INC·Filed 1989·Granted Apr 24, 1990·127 cites·14 claims
- 2489US5145340APacking for piston and valve machineDOWELL SCHLUMBERGER INC·Filed 1991·Granted Sep 8, 1992·79 cites·15 claims
- 2589US4828033AApparatus and method for treatment of wellsDOWELL SCHLUMBERGER INC·Filed 1985·Granted May 9, 1989·180 cites·18 claims
- 2689US4797159AExpandable cement compositionDOWELL SCHLUMBERGER INC·Filed 1986·Granted Jan 10, 1989·58 cites·22 claims
- 2789US4691774ANovel ferrofluids for use in cementing wellsDOWELL SCHLUMBERGER INC·Filed 1985·Granted Sep 8, 1987·39 cites·3 claims
- 2888US4838352AProcess for plugging subterranean formationsDOWELL SCHLUMBERGER INC·Filed 1987·Granted Jun 13, 1989·85 cites·5 claims
- 2988US4828034AMethod of hydrating oil based fracturing concentrate and continuous fracturing process using sameDOWELL SCHLUMBERGER INC·Filed 1987·Granted May 9, 1989·81 cites·15 claims
- 3088US4659116APipe union for cryogenic fluidsDOWELL SCHLUMBERGER INC·Filed 1985·Granted Apr 21, 1987·72 cites·18 claims
- 3187US5361836AStraddle inflatable packer systemDOWELL SCHLUMBERGER INC·Filed 1993·Granted Nov 8, 1994·103 cites·5 claims
- 3287US5197324AMethods and apparatus using a gel to isolate mainline valves in a pipeline during a hydrotestDOWELL SCHLUMBERGER INC·Filed 1992·Granted Mar 30, 1993·79 cites·27 claims
- 3387US4797216ADelayed crosslinker compositionDOWELL SCHLUMBERGER INC·Filed 1986·Granted Jan 10, 1989·49 cites·13 claims
- 3487US4780223AStabilized fracture fluid and crosslinker thereforDOWELL SCHLUMBERGER INC·Filed 1986·Granted Oct 25, 1988·47 cites·18 claims
- 3587US4637899ACorrosion inhibitors for cleaning solutionsDOWELL SCHLUMBERGER INC·Filed 1984·Granted Jan 20, 1987·63 cites·22 claims
- 3685US5658861ADelayed borate crosslinked fracturing fluid having increased temperature rangeDOWELL SCHLUMBERGER INC·Filed 1995·Granted Aug 19, 1997·59 cites·46 claims
- 3785US5627143AWellbore fluidDOWELL SCHLUMBERGER INC·Filed 1994·Granted May 6, 1997·48 cites·12 claims
- 3885US5350018AWell treating system with pressure readout at surface and methodDOWELL SCHLUMBERGER INC·Filed 1993·Granted Sep 27, 1994·90 cites·22 claims
- 3985US5314014APacker and valve assembly for temporary abandonment of wellsDOWELL SCHLUMBERGER INC·Filed 1992·Granted May 24, 1994·115 cites·9 claims
- 4085US4920795AElectromagnetic flowmeter for conductive or dielectric fluids and its applications in particular oilfieldDOWELL SCHLUMBERGER INC·Filed 1987·Granted May 1, 1990·54 cites·9 claims
- 4185US4767460ACement compositions for cementing of wells enabling gas channelling in the cemented annulus to be inhibited by right-angle settingDOWELL SCHLUMBERGER INC·Filed 1986·Granted Aug 30, 1988·80 cites·8 claims
- 4285US4572519APacking assembly for use in a plunger boreDOWELL SCHLUMBERGER INC·Filed 1984·Granted Feb 25, 1986·48 cites·4 claims
- 4384US4681165AAqueous chemical wash compositionsDOWELL SCHLUMBERGER INC·Filed 1984·Granted Jul 21, 1987·63 cites·16 claims
- 4484US4633949AMethod of preventing precipitation of ferrous sulfide and sulfur during acidizingDOWELL SCHLUMBERGER INC·Filed 1985·Granted Jan 6, 1987·64 cites·13 claims
- 4583US4646834AAqueous treatment fluid and method of useDOWELL SCHLUMBERGER INC·Filed 1980·Granted Mar 3, 1987·61 cites·18 claims
- 4683US4623399ASolvent for removing iron oxide depositsDOWELL SCHLUMBERGER INC·Filed 1985·Granted Nov 18, 1986·31 cites·25 claims
- 4783US4601758ASulfonated poly (vinyl aromatics) as fluid loss additives for salt cement slurriesDOWELL SCHLUMBERGER INC·Filed 1985·Granted Jul 22, 1986·37 cites·23 claims
- 4882US5229017AMethod of enhancing methane production from coal seams by dewateringDOWELL SCHLUMBERGER INC·Filed 1990·Granted Jul 20, 1993·56 cites·6 claims
- 4981US4671665AMachine for mixing particles with a fluid compositionDOWELL SCHLUMBERGER INC·Filed 1986·Granted Jun 9, 1987·40 cites·37 claims
- 5080US5948733AFluid loss controlDOWELL SCHLUMBERGER INC·Filed 1996·Granted Sep 7, 1999·50 cites·31 claims
Showing the top 50 of 119 patent records by PatentIndex Score.
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