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Gerrit Kroesen |
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| 12385348 |
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Gerrit Kroesen, Suman Katanguri |
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Operating system cartridge for an annular blowout preventer |
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2020-07-28 |
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External pressure CX gasket |
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Systems and methods for assembling a blowout preventer |
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2019-05-28 |
| 10161213 |
Internal and external pressure seal assembly |
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2018-12-25 |
| 9765587 |
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