Downhole deployment valves
Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A downhole deployment valve (DDV) may provide the isolation utilizing a valve member such as a flapper (1702) that is disposed in a housing of the DDV...
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| Main Authors | , , , , , |
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| Format | Patent |
| Language | English French German |
| Published |
19.12.2012
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| Subjects | |
| Online Access | Get full text |
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| Abstract | Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A downhole deployment valve (DDV) may provide the isolation utilizing a valve member such as a flapper (1702) that is disposed in a housing of the DDV and is designed to close against a seat (1714) within the housing. The DDV includes an operating mechanism (1703,1704) for opening/closing the DDV. In use, pressure in one portion of a well that is in fluid communication with a well surface may be bled off and open at well surface while maintaining pressure in another portion of the casing string beyond the DDV. |
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| AbstractList | Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A downhole deployment valve (DDV) may provide the isolation utilizing a valve member such as a flapper (1702) that is disposed in a housing of the DDV and is designed to close against a seat (1714) within the housing. The DDV includes an operating mechanism (1703,1704) for opening/closing the DDV. In use, pressure in one portion of a well that is in fluid communication with a well surface may be bled off and open at well surface while maintaining pressure in another portion of the casing string beyond the DDV. |
| Author | PAVEL, DAVID SMITH, PAUL L GRAYSON, MICHAEL BRIAN BRUNNERT, DAVID J NOSKE, JOE IBLINGS, DAVID |
| Author_xml | – fullname: SMITH, PAUL L – fullname: PAVEL, DAVID – fullname: GRAYSON, MICHAEL BRIAN – fullname: NOSKE, JOE – fullname: BRUNNERT, DAVID J – fullname: IBLINGS, DAVID |
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| DocumentTitleAlternate | Soupapes de déploiement de fond de trou Bohrloch-Einsetzventile |
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| Notes | Application Number: EP20120183774 |
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| RelatedCompanies | WEATHERFORD/LAMB INC |
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| Snippet | Methods and apparatus enable reliable and improved isolation between two portions of a bore extending through a casing string disposed in a borehole. A... |
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| SubjectTerms | EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS |
| Title | Downhole deployment valves |
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