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Patent applications and USPTO patent grants for Ilfrey; William T..The latest application filed is for "gravel packing apparatus and method".
Patent | Date |
---|---|
Gravel packing apparatus and method Grant 4,858,691 - Ilfrey , et al. August 22, 1 | 1989-08-22 |
Riser set-aside system Grant 4,147,221 - Ilfrey , et al. April 3, 1 | 1979-04-03 |
Annular seal Grant 4,131,287 - Gunderson , et al. December 26, 1 | 1978-12-26 |
Casing seal and blowout preventer tester and test method Grant 4,090,395 - Dixon , et al. May 23, 1 | 1978-05-23 |
Self-supported drilling riser Grant 3,999,617 - Ilfrey , et al. December 28, 1 | 1976-12-28 |
Marine riser Grant 3,981,357 - Walker , et al. September 21, 1 | 1976-09-21 |
Marine Riser Assembly Grant 3,913,668 - Todd , et al. October 21, 1 | 1975-10-21 |
Casing seal tester for subsea completions Grant 3,872,713 - Ilfrey , et al. March 25, 1 | 1975-03-25 |
Method And Apparatus For Controlling Hydrostatic Pressure Gradient In Offshore Drilling Operations Grant 3,815,673 - Bruce , et al. June 11, 1 | 1974-06-11 |
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