Underreamer with adjustable cutter block expansion
US9988852B2 · kind B2 · utility
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1References
20Claims
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Assignee
Inventor
Key dates
| Filing date | Dec 17, 2015 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | May 24, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/322
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An underreamer for increasing a diameter of a wellbore. The underreamer includes a body having an axial bore extending at least partially therethrough. A sleeve is arranged and designed to move a first axial distance within the body. A cutter block is movably coupled to the body. The cutter block is arranged and designed to move at least the first axial distance with respect to the body to contact the sleeve in response to hydraulic pressure in the bore. The cutter block moves from a first outer diameter to a second outer diameter as the cutter block moves the first axial distance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.