Drilling kick-off device
US5431223A · kind A · utility
23Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1994 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Apr 28, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/061
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A kick-off device is provided. The kick-off device is useful in drilling a pair of opposite deviated borehole branches in an under ground formation from a single borehole and comprises an open-ended tube provided at its upper end with connecting means to join the open-ended tube to a string of casing, and a guide element arranged in the open-ended tube near its lower end, which guide element includes two hollow slanted guide ways arranged on opposite sides of the guide element, wherein the wall of the open-ended tube has elongated openings facing the slanted guide ways.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.