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Sliding sleeve sub and method and apparatus for wellbore fluid treatment |
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Energized slip ring assembly |
Byron John Sand, Herman Hinrich Albers, John Hardin |
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Variable gauge drilling apparatus and method of assembly therefor |
Julio Abraham Carrera Garcia, Nestor Humberto Gil, Bryan James Restau, Richard Thomas Hay, Edward James Cargill |
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Floating instrument insert for a tool |
John Hardin |
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Drilling direction control device |
Edward James Cargill, Evan Lloyd Davies, Gary L. Donison, Gerald Edward Kent, Boguslaw Wiecek |
2004-08-03 |
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Steerable rotary directional drilling method |
Laurier E. Comeau, Elis Vandenberg, Edward James Cargill, John Hardin, Bryan James Restau +3 more |
2002-01-22 |
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