Method and device for remote-controlling drill string equipment by a sequence of information
US5065825A · kind A · utility
48Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1989 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Dec 29, 2009 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of and a device for remotely-controlling at least one piece of drill string equipment from an instruction issued from the surface. The method includes issuing from the surface a first information sequence to cause a first predetermined action according to a predetermined sequence, detection of a condition indicative of a second sequence resulting from the first sequence, comparison of this second sequence with another predetermined sequence, and operating the equipment only if there is similarity between the latter two sequences. The method can be applied to actuation of a variable-angle bent element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.