Steerable directional drilling tool
US5941323A · kind A · utility
40Cited by
7References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Sep 23, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drilling tool for use with a drill string into which drilling fluid is pumped. The tool comprises: a non-rotating housing having stabilizer blades on its outer surface; a rotating mandrel, passing through the housing; extendible blade means for moving the housing relative to a borehole; and a cam mechanism that is carried by at least one of the mandrel and the housing, and that is operated by drill string rotation and the flow of drilling fluid for operating the extendible blade means to move the drill string and steer the drill bit attached hereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.