Orienting, retrievable whipstock anchor
US5871046A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Aug 11, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/061
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A whipstock and whipstock anchor that allows for select orientation of the whipstock, retrievability of the whipstock, and also resetting of the whipstock in select orientation. The whipstock is for use in drilling a cased subterranean well with a drill bit. The whipstock includes a first device that directs the drill bit. The first device is supported at a desired location along the well casing by a second device. The first device and second device incorporate mechanisms that allow selective orientation of the first device with respect to the second device. The orientation of the second device in its location along the well casing can be accurately detected, and the mechanisms that allow selective orientation of the first device with the second device can be adjusted to provide an accurate, desired orientation for diverting a drill bit or other tool as it contacts the first device. The first device of the whipstock is retrievable and may be run multiple times to the same wellbore location to provide multiple orientations for creating wellbore bends and branching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.