Harold D. Johnson

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Houston, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Electrical surface activated downhole circulating sub
- Patent number 6,543,532
- Issue date Apr 8, 2003
- Halliburton Energy Services, Inc.
- James W. Estep
- E21 - EARTH DRILLING MINING
Information Patent Grant
Electrical surface activated downhole circulating sub
- Patent number 6,349,763
- Issue date Feb 26, 2002
- Halliburton Energy Services, Inc.
- James W. Estep
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for automatic closed loop drilling system
- Patent number 5,332,048
- Issue date Jul 26, 1994
- Halliburton Company
- Lance D. Underwood
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for adjusting the position of stabilizer blades
- Patent number 5,318,137
- Issue date Jun 7, 1994
- Halliburton Company
- Harold D. Johnson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Adjustable stabilizer
- Patent number 5,318,138
- Issue date Jun 7, 1994
- Halliburton Company
- Charles H. Dewey
- E21 - EARTH DRILLING MINING
Information Patent Grant
Moineau motor with conduits through the stator
- Patent number 5,171,139
- Issue date Dec 15, 1992
- Smith International, Inc.
- Lance D. Underwood
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Electrical surface activated downhole circulating sub
- Publication number 20020005299
- Publication date Jan 17, 2002
- James W. Estep
- E21 - EARTH DRILLING MINING