Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8030389 | Thermal insulation composition | Mohammad Tej, David B. Young, John B. Trenery, Floyd Harvey, Marvin L. Pless | 2011-10-04 |
| 7977280 | Process for minimizing breaking of emulsion type drilling fluid systems, emulsion type drilling fluid systems, and spotting fluids | — | 2011-07-12 |
| 7651980 | High temperature filtration control using water based drilling fluid systems comprising water soluble polymers | Dennis K. Clapper | 2010-01-26 |
| 7067460 | Organofunctional compounds for shale stabilization of the aqueous dispersed phase of non-aqueous based invert emulsion drilling system fluids | Jerry L. Summerhill, Alexander McKellar, David B. Young, Patrick E. Grover, William J. Gusler | 2006-06-27 |
| 6855671 | Water based fluids comprising multivalent salts and low molecular weight, low charge cationic polyacrylamide copolymers | James Norfleet, Patricia A. Potts, Tao Xiang, Frank E. Evans | 2005-02-15 |
| 6790812 | Acid soluble, high fluid loss pill for lost circulation | William S. Halliday, Dennis K. Clapper, Michelle Carr | 2004-09-14 |
| 6355600 | Shale stabilizing drilling fluids comprising calcium chloride and low molecular weight low charge cationicpolyacrylamide copolymers | James Norfleet, Patricia A. Potts, Tao Xiang, Frank E. Evans | 2002-03-12 |
| 6211120 | Application of aluminum chlorohydrate in viscosifying brine for carrying proppants in gravel packing | John C. Welch, Allen D. Gabrysch, Benn Voll, Brett Collins, Cedric Nix | 2001-04-03 |
| 6194216 | Method for determination of amine-based additives in drilling fluid filtrates | Nyal S. Walker, Dennis K. Clapper | 2001-02-27 |
| 6194355 | Use of alkoxylated surfactants and aluminum chlorohydrate to improve brine-based drilling fluids | Harold R. Krause, John C. Welch, Allen D. Gabrysch, Patricia A. Potts | 2001-02-27 |
| 5919738 | Fluids for use in drilling and completion operations comprising water insoluble colloidal complexes for improved rheology and filtration control | James Norfleet, William M. Dye, Dennis K. Clapper, Geoffrey Robinson, Ronald G. Bland +2 more | 1999-07-06 |
| 5607904 | Nonionic alkanolamides as shale stabilizing surfactants for aqueous well fluids | — | 1997-03-04 |
| 5593952 | Amphoteric acetates and glycinates as shale stabilizing surfactants for aqueous well fluids | — | 1997-01-14 |