Shock absorber assembly for absorbing shocks encountered by a drill string
US4387885A · kind A · utility
6Cited by
27References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 7, 1982 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | May 7, 2002 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/07
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A shock absorber assembly for absorbing shocks encountered by a drill string wherein the shock absorber assembly is for use with a drill string having a working fluid therein and includes a body member affixed to the drill string, a mandrel mounted for reciprocal longitudinal movement with respect to the body member and a fluid dampening member floated within the central bore of the body member in engagement with the body member and the mandrel for absorbing shocks transmitted between the body member and the mandrel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.