Active control method and control device for wellbore pressure in the open-cycle drilling of marine natural gas hydrates
US-11002126-B2 · May 11, 2021 · US
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Patent family 72919380
This patent family groups 2 related publications across US. Members often share priority claims or equivalent filings in different countries.
| Field | Value |
|---|---|
| Family ID | 72919380 |
| Family type | — |
| Earliest priority | Aug 4, 2020 |
| First filing country | US |
| Member publications | 2 |
| Countries | US |
| Representative publication | US11002126B2 — Active control method and control device for wellbore pressure in the open-cycle drilling of marine natural gas hydrates |
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US11002126B2 — Active control method and control device for wellbore pressure in the open-cycle drilling of marine natural gas hydrates (published May 11, 2021)
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