Fail safe downhole signal repeater
US6218959A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1997 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Dec 3, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/14
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system and method of fail safe communication of information between surface equipment and downhole equipment are disclosed. The system comprises two or more repeaters (34, 35, 36) disposed within a wellbore (38) such that two repeaters (34, 35) will receive each signal carrying information that is telemetered. The repeater (35) that is farther from the source (44) will include a memory device (292) that stores the information carried in the signal. A timer device (293) also in the repeater (35) that is farther from the source (44) will trigger the retransmission of the information after a predetermined time period unless the repeater (35) that is farther from the source (44) has detected a signal carrying the information generated by the repeater (34) that is closer to the source (44).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.