Inventor · disambiguated record
Hwa-Shan Ho
Also filed as: HO HWA-SHAN
11 granted patents·812 citations·filing 1985–1995
94Inventor score
Technology areasE21B
Top patents by PatentIndex Score
11 records- 0191US4804051AMethod of predicting and controlling the drilling trajectory in directional wellsNL INDUSTRIES INC·Filed 1987·Granted Feb 14, 1989·108 cites·16 claims
- 0291US4662458AMethod and apparatus for bottom hole measurementNL INDUSTRIES INC·Filed 1985·Granted May 5, 1987·107 cites·14 claims
- 0385US5456141AMethod and system of trajectory prediction and control using PDC bitsFiled 1993·Granted Oct 10, 1995·84 cites·15 claims
- 0485US5358059AApparatus and method for the dynamic measurement of a drill string employed in drillingHO HWA SHAN·Filed 1993·Granted Oct 25, 1994·114 cites·19 claims
- 0584US5465799ASystem and method for precision downhole tool-face setting and survey measurement correctionFiled 1994·Granted Nov 14, 1995·91 cites·18 claims
- 0683US4972703AMethod of predicting the torque and drag in directional wellsBAROID TECHNOLOGY INC·Filed 1989·Granted Nov 27, 1990·66 cites·6 claims
- 0781US5608162AMethod and system of trajectory prediction and control using PDC bitsFiled 1995·Granted Mar 4, 1997·84 cites·10 claims
- 0877US4848144AMethod of predicting the torque and drag in directional wellsSPERRY SUN INC·Filed 1988·Granted Jul 18, 1989·51 cites·38 claims
- 0968US5044198AMethod of predicting the torque and drag in directional wellsBAROID TECHNOLOGY INC·Filed 1990·Granted Sep 3, 1991·47 cites·11 claims
- 1054US5431046ACompliance-based torque and drag monitoring system and methodFiled 1994·Granted Jul 11, 1995·27 cites·9 claims
- 1153US5560439AMethod and apparatus for reducing the vibration and whirling of drill bits and the bottom hole assembly in drilling used to drill oil and gas wellsFiled 1995·Granted Oct 1, 1996·33 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →