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Air hammer coring apparatus and method |
— |
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— |
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— |
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Drilling, completing and stimulating a hydrocarbon production well |
— |
2011-05-31 |
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— |
2009-06-02 |
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Method and apparatus for isolating and testing zones during reverse circulation drilling |
— |
2008-03-18 |
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Reverse circulation directional and horizontal drilling using concentric drill string |
— |
2007-04-17 |
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Reverse circulation clean out system for low pressure gas wells |
— |
2006-08-15 |
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Reverse circulation directional and horizontal drilling using concentric coil tubing |
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Two string drilling system |
— |
2005-05-17 |
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Two string drilling system using coil tubing |
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2005-02-15 |
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Temperature control system for a cryogenic refrigeration |
Graham J. Higham, Gerald R. Pruitt |
1991-05-28 |
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Linear motor compresser with stationary piston |
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1990-05-15 |