Inventor · disambiguated record
Thad O. Walker
Also filed as: WALKER THAD O · WALKER THAD OSCAR
34 granted patents·918 citations·filing 1973–1993
98Inventor score
Top patents by PatentIndex Score
34 records- 0193US4447338ADrilling mud viscosification agents based on sulfonated ionomersEXXON RESEARCH ENGINEERING CO·Filed 1981·Granted May 8, 1984·76 cites·10 claims
- 0292US4508628AFast drilling invert emulsion drilling fluidsOBRIEN GOINS SIMPSON & ASS·Filed 1983·Granted Apr 2, 1985·189 cites·8 claims
- 0392US4425462ADrilling fluids based on sulfonated elastomeric polymersEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Jan 10, 1984·71 cites·15 claims
- 0492US4172800ADrilling fluids containing an admixture of polyethoxylated, sulfurized fatty acids and polyalkylene glycolsTEXACO INC·Filed 1977·Granted Oct 30, 1979·61 cites·18 claims
- 0589US3953337AMethod of drilling wells employing water base drilling fluidsTEXACO INC·Filed 1973·Granted Apr 27, 1976·41 cites·2 claims
- 0688US4464269AAdditive composition for release of stuck drill pipeEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Aug 7, 1984·47 cites·8 claims
- 0783US5403820AEnvironmentally safe water base drilling fluidOBRIEN GOINS SIMPSON & ASS·Filed 1992·Granted Apr 4, 1995·43 cites·13 claims
- 0883US3956141AAdditive for reducing fluid loss or filtration rate for aqueous drilling fluid containing both high salinity and high soluble calciumTEXACO INC·Filed 1973·Granted May 11, 1976·21 cites·8 claims
- 0982US4382002ADrilling fluids containing an additive compositionEXXON RESEARCH ENGINEERING CO·Filed 1981·Granted May 3, 1983·16 cites·5 claims
- 1076US4442011ADrilling mud viscosification agents based on sulfonated ionomersEXXON RESEARCH ENGINEERING CO·Filed 1981·Granted Apr 10, 1984·30 cites·9 claims
- 1176US4095987AMethod of and composition for cementing oil wellsTEXACO INC·Filed 1976·Granted Jun 20, 1978·24 cites·6 claims
- 1272US4540496AIntramolecular polymer complexes - viscosifiers for high ionic strength drilling fluidsEXXON RESEARCH ENGINEERING CO·Filed 1983·Granted Sep 10, 1985·26 cites·5 claims
- 1371US4425461ADrilling fluids based on a mixture of a sulfonated thermoplastic polymer and a sulfonated elastomeric polymerEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Jan 10, 1984·24 cites·24 claims
- 1468US4427564AAdditive composition for release of stuck drill pipeEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Jan 24, 1984·23 cites·8 claims
- 1567US5710107AEnvironmentally safe drilling fluidOBRIEN GOINS SIMPSON & ASS·Filed 1993·Granted Jan 20, 1998·20 cites·26 claims
- 1666US4436638AAdditive composition for release of stuck drill pipeEXXON RESEARCH ENGINEERING CO·Filed 1981·Granted Mar 13, 1984·23 cites·8 claims
- 1763US4525522ADrilling fluids based on sulfonated thermoplastic polymers having improved low temperature rheological propertiesEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Jun 25, 1985·19 cites·14 claims
- 1863US4053422ADrilling fluids containing polyethoxylated tetraalkyl acetylenic diolsTEXACO INC·Filed 1976·Granted Oct 11, 1977·16 cites·22 claims
- 1963US4043396AAlkoxylated asphalt as sacrificial agents in oil recovery processesTEXACO INC·Filed 1976·Granted Aug 23, 1977·17 cites·9 claims
- 2061US3998742AAdditive for reducing gel strength in aqueous drilling fluidsTEXACO INC·Filed 1974·Granted Dec 21, 1976·8 cites·10 claims
- 2160US4478727ASodium styrene sulfonate-co-sodium-n-(4-sulfophenyl)-maleimide- an improved viscosity control additiveEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Oct 23, 1984·16 cites·5 claims
- 2258US4510998AFluid loss additive for well drillingEXXON RESEARCH ENGINEERING CO·Filed 1983·Granted Apr 16, 1985·15 cites·18 claims
- 2355US4425455ADrilling fluids based on powdered sulfonated thermoplastic polymersEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Jan 10, 1984·12 cites·14 claims
- 2454US4465801AInterfacial viscosification of aqueous system utilizing sulfonated ionomersEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Aug 14, 1984·11 cites·19 claims
- 2552US4425463ADrilling fluids based on a mixture of sulfonated thermoplastic polymer and an amine-treated clayEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Jan 10, 1984·13 cites·18 claims
- 2651US4021356AAlkoxylated asphalts as co-surfactants in surfactant oil recovery processes usable in formations containing water having high concentrations of polyvalent ions such as calcium and magnesiumTEXACO INC·Filed 1975·Granted May 3, 1977·11 cites·6 claims
- 2749US4064056ADrilling fluids containing an additive compositionTEXACO INC·Filed 1976·Granted Dec 20, 1977·10 cites·8 claims
- 2847US4491524ALubricating additive for drilling mudsEXXON RESEARCH ENGINEERING CO·Filed 1983·Granted Jan 1, 1985·9 cites·9 claims
- 2946US4579669AHigh temperature drilling fluids based on sulfonated thermoplastic polymersEXXON RESEARCH ENGINEERING CO·Filed 1984·Granted Apr 1, 1986·9 cites·13 claims
- 3045US4141840ADrilling fluids containing polyethoxylated, sulfurized fatty alcoholsTEXACO INC·Filed 1977·Granted Feb 27, 1979·8 cites·6 claims
- 3138US3978927AAlkoxylated asphalts as sacrificial agents in oil recovery processesTEXACO INC·Filed 1975·Granted Sep 7, 1976·5 cites·9 claims
- 3237US4427812AInterfacial viscosification of salt water systems utilizing sulfonated ionomersEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Jan 24, 1984·4 cites·19 claims
- 3330US4584386AAlkylthiomethyl substituted mono-oxazolinesEXXON RESEARCH ENGINEERING CO·Filed 1984·Granted Apr 22, 1986·0 cites·5 claims
- 3430US4426473AInterfacial viscosification of aqueous acid systems utilizing sulfonated ionomersEXXON RESEARCH ENGINEERING CO·Filed 1982·Granted Jan 17, 1984·0 cites·19 claims
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