Crank connector for directional drilling
US4286676A · kind A · utility
34Cited by
7References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1979 |
| Grant date | Sep 1, 1981 |
| Priority date | — |
| Expiry date | Jul 24, 1999 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/067
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This connector comprises two tubular members connected to each other, one of which can pivot about a rotation axis which forms an acute angle with the axis of the two members. This axis of rotation and the axes of the two members converge to the same point. Remote control means are operative to vary at will the relative angular position of the tubular members and means are adapted to lock said two members against relative rotation in a selected angular position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.