Method and apparatus for drilling a well bore
US4440241A · kind A · utility
5Cited by
10References
13Claims
0Family size
Inventor
Key dates
| Filing date | Aug 24, 1981 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Aug 24, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B44/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of and apparatus for drilling directional well bores is disclosed in which the well bore or a portion thereof is drilled along a line that follows, as close as possible, a preselected catenary curve. An extensible joint located between a stabilizer just above the drilling bit and a stabilizer spaced from the bit stabilizer is used to cause the bit to tend to increase the dip angle of the well bore at an increasing rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.