Borehole sidetrack locator
US5415238A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1994 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Apr 29, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B23/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention is an apparatus for guiding a borehole servicing tool string into a sidetrack of a borehole. In one embodiment, a centralizer displaces a pivotally-mounted housing towards the sidetrack. A rounded nose on the bottom of the housing enables free passage of the housing into the sidetrack. In an alternative embodiment, a rounded nose is attached to a hinge at the bottom of the housing, and the tool housing is rotatably mounted to the tool string. The nose is displaced axially about the hinge, and the housing is rotated until the nose is aligned with the sidetrack as indicated by an orientation measuring device disposed within the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.