Downhole shock absorber
US6412614B1 · kind B1 · utility
42Cited by
27References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Sep 20, 1999 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Sep 20, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A shock absorber for damping shock energy generated by downhole perforating guns or stimulation devices is described. The shock absorber includes a spring assembly including at least a first spring and a second spring, the first spring having a tension greater than the second spring; a damper assembly; and a housing retaining the spring assembly and the damper assembly and including ends adapted for connection into a casing perforation assembly. The provision of springs of increasing stiffness permits the force generated by the perforating gun to be absorbed gradually and smoothly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.