Flow off downhole communication method and related systems
US9702245B1 · kind B1 · utility
2Cited by
7References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2016 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Feb 12, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method enables communication with downhole tools during a “flow off” condition by energizing at least one sensor and a controller using a local power source only after flow of drilling fluid has been reduced below the threshold flow rate value. Thereafter, the method involves generating the at least one predetermined pattern into the wellbore, detecting the at least one predetermined pattern using the at least one sensor and the controller, and transmitting a signal using the controller in response to the detected at least one predetermined pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.