Sub assembly
US10392874B2 · kind B2 · utility
0Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2016 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Mar 28, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1064
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A sub assembly for coupling to a drill string, the assembly comprising; a mandrel; a sleeve arranged to be co-axially positioned about said mandrel; a first stop arranged to prevent axial movement of the sleeve along the mandrel in a first direction; a second stop arranged to prevent axial movement of the sleeve in a second direction; wherein said second stop is releasably engageable from the mandrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.