Retrievable whipstock
US5909770A · kind A · utility
19Cited by
34References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1997 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Aug 13, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/01
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A thru-tubing retrievable whipstock is disclosed. A running tool creates relative movement to pivot out anchors at the lower end of the whipstock to accomplish its support. The setting force is trapped by spring-loaded wedges. The whipstock can be released and retrieved through tubing by undermining the wedges which allows retrieval of the whipstock by a pick-up force on the whipstock which collapses the anchoring mechanism for retrieval of the entire assembly to the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.