Assignee
WESTERN CO OF NORTH AMERICA
US·40 granted patents·2,269 citations·filing 1974–1994
Top patents by PatentIndex Score
40 records- 0197US4708202ADrillable well-fluid flow control toolWESTERN CO OF NORTH AMERICA·Filed 1986·Granted Nov 24, 1987·259 cites·32 claims
- 0296US5069283AFracturing process using carbon dioxide and nitrogenWESTERN CO OF NORTH AMERICA·Filed 1989·Granted Dec 3, 1991·114 cites·26 claims
- 0395US4474204ADelivery and metering device control systemWESTERN CO OF NORTH AMERICA·Filed 1983·Granted Oct 2, 1984·88 cites·6 claims
- 0494US5437331AMethod for fracturing subterranean formations using controlled release breakers and compositions useful thereinWESTERN CO OF NORTH AMERICA·Filed 1994·Granted Aug 1, 1995·118 cites·11 claims
- 0594US4579668AWell servicing agents and processesWESTERN CO OF NORTH AMERICA·Filed 1983·Granted Apr 1, 1986·124 cites·15 claims
- 0692US4158521AMethod of stabilizing clay formationsWESTERN CO OF NORTH AMERICA·Filed 1978·Granted Jun 19, 1979·112 cites·16 claims
- 0791US5305832AMethod for fracturing high temperature subterranean formationsWESTERN CO OF NORTH AMERICA·Filed 1992·Granted Apr 26, 1994·106 cites·14 claims
- 0891US5164099AEncapsulations for treating subterranean formations and methods for the use thereofWESTERN CO OF NORTH AMERICA·Filed 1990·Granted Nov 17, 1992·115 cites·40 claims
- 0988US5106518ABreaker system for high viscosity fluids and method of useWESTERN CO OF NORTH AMERICA·Filed 1990·Granted Apr 21, 1992·136 cites·21 claims
- 1085US5226479AFracturing fluid having a delayed enzyme breakerWESTERN CO OF NORTH AMERICA·Filed 1992·Granted Jul 13, 1993·66 cites·7 claims
- 1185US3948325AFracturing of subsurface formations with Bingham plastic fluidsWESTERN CO OF NORTH AMERICA·Filed 1975·Granted Apr 6, 1976·76 cites·34 claims
- 1284US4534870ACrosslinker composition for high temperature hydraulic fracturing fluidsWESTERN CO OF NORTH AMERICA·Filed 1982·Granted Aug 13, 1985·43 cites·18 claims
- 1382US5424285AMethod for reducing deleterious environmental impact of subterranean fracturing processesWESTERN CO OF NORTH AMERICA·Filed 1993·Granted Jun 13, 1995·61 cites·22 claims
- 1482US5211859ALow pH fracturing compositionsWESTERN CO OF NORTH AMERICA·Filed 1991·Granted May 18, 1993·42 cites·15 claims
- 1581US5360558ASlurried polymer foam system and method for the use thereofWESTERN CO OF NORTH AMERICA·Filed 1992·Granted Nov 1, 1994·58 cites·34 claims
- 1681US5116421AHigh temperature fluid loss additive for cement slurry and method of cementingWESTERN CO OF NORTH AMERICA·Filed 1990·Granted May 26, 1992·42 cites·33 claims
- 1780US5099922AControl of gas flow through cement columnWESTERN CO OF NORTH AMERICA·Filed 1991·Granted Mar 31, 1992·41 cites·17 claims
- 1880US4258790AWell cementing method using low fluid-loss cement slurryWESTERN CO OF NORTH AMERICA·Filed 1979·Granted Mar 31, 1981·50 cites·14 claims
- 1979US5232497AClay control additive for cement compositions and method of cementingWESTERN CO OF NORTH AMERICA·Filed 1992·Granted Aug 3, 1993·30 cites·17 claims
- 2079US5217531AFluid loss additives for cementing compositionsWESTERN CO OF NORTH AMERICA·Filed 1991·Granted Jun 8, 1993·50 cites·19 claims
- 2178US5441109AEnzyme breakers for breaking fracturing fluids and methods of making and use thereofWESTERN CO OF NORTH AMERICA·Filed 1994·Granted Aug 15, 1995·41 cites·7 claims
- 2278US4484625AWell casing perforated zone washing apparatusWESTERN CO OF NORTH AMERICA·Filed 1982·Granted Nov 27, 1984·55 cites·11 claims
- 2377US5089151AFluid additive and method for treatment of subterranean formationsWESTERN CO OF NORTH AMERICA·Filed 1990·Granted Feb 18, 1992·54 cites·25 claims
- 2476US4276182AHigh temperature cement mud spacerWESTERN CO OF NORTH AMERICA·Filed 1979·Granted Jun 30, 1981·28 cites·15 claims
- 2575US5597040ACombination gravel packing/frac apparatus for use in a subterranean well boreWESTERN CO OF NORTH AMERICA·Filed 1994·Granted Jan 28, 1997·61 cites·5 claims
- 2674US5054552ABreaker system for aqueous fluids containing xanthan gumsWESTERN CO OF NORTH AMERICA·Filed 1990·Granted Oct 8, 1991·34 cites·7 claims
- 2773US5002125AFracturing process using a viscosity stabilized energizing phaseWESTERN CO OF NORTH AMERICA·Filed 1989·Granted Mar 26, 1991·51 cites·26 claims
- 2869US4535915ADelivery and metering device for granulated and powdered materialsWESTERN CO OF NORTH AMERICA·Filed 1983·Granted Aug 20, 1985·25 cites·15 claims
- 2965US4190110AMethod of cementing wellbores using high temperature cement mud spacerWESTERN CO OF NORTH AMERICA·Filed 1978·Granted Feb 26, 1980·19 cites·6 claims
- 3065US3980881ASimultaneous logging system for deep wellsWESTERN CO OF NORTH AMERICA·Filed 1974·Granted Sep 14, 1976·32 cites·27 claims
- 3158US5362408AHigh temperature gel stabilizer for fracturing fluidsWESTERN CO OF NORTH AMERICA·Filed 1992·Granted Nov 8, 1994·13 cites·10 claims
- 3257US5389145ACement mixing systemWESTERN CO OF NORTH AMERICA·Filed 1993·Granted Feb 14, 1995·15 cites·10 claims
- 3357US5376749AStabilized ammonium polysulfide solutions and process utilizing sameWESTERN CO OF NORTH AMERICA·Filed 1993·Granted Dec 27, 1994·12 cites·11 claims
- 3454US4448535AApparatus for blending additives into a liquidWESTERN CO OF NORTH AMERICA·Filed 1981·Granted May 15, 1984·20 cites·19 claims
- 3547US5180010AMultiple acting lock for gravel pack systemWESTERN CO OF NORTH AMERICA·Filed 1991·Granted Jan 19, 1993·21 cites·23 claims
- 3643US5423205ADensitometerWESTERN CO OF NORTH AMERICA·Filed 1992·Granted Jun 13, 1995·19 cites·38 claims
- 3737US4679624AHydraulic setting toolWESTERN CO OF NORTH AMERICA·Filed 1985·Granted Jul 14, 1987·10 cites·32 claims
- 3837US4588509AProppant concentratorWESTERN CO OF NORTH AMERICA·Filed 1984·Granted May 13, 1986·13 cites·29 claims
- 3934US4735268AMechanical setting toolWESTERN CO OF NORTH AMERICA·Filed 1986·Granted Apr 5, 1988·8 cites·15 claims
- 4030US4007366ARadioactive tracer profiling system and apparatusWESTERN CO OF NORTH AMERICA·Filed 1975·Granted Feb 8, 1977·7 cites·22 claims
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