System for drilling deviated boreholes
US5602541A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1995 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | Apr 24, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/26
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Improved techniques are provided for drilling a deviated borehole through earth formations utilizing a rotary bit powered by a drill motor, and for obtaining information regarding the borehole or earth formations. A sensor permanently positioned in the drilling string between the drill bit and the drill motor detects a downhole parameter. An MWD tool may be provided within a non-magnetic portion of the drill string for receiving and transmitting a sensor representative signal to the surface. The sensor signal allows the drilling operation to be altered, and highly reliable and near-bit information thus improves the drilling operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.