Core barrel sonic latch mechanism and methods of sonic drilling using the same
US8261857B2 · kind B2 · utility
10Cited by
14References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2008 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Feb 13, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B25/02
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A head assembly includes a body, a spearhead operatively associated with the body and configured to translate axially relative to the body, and at least one latch operatively associated with the spearhead and the body. The latch is configured to move between an extended position and a retracted position relative to the body in response to axial translation of the spearhead relative to the body. In an extended position, the latch covers more than 25% of the circumference of the body adjacent the latches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.