Method of decoding MWD signals using annular pressure signals
US5272680A · kind A · utility
15Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 17, 1991 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | May 17, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/22
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method is presented for obtaining borehole measurements using measurement-while-drilling apparatus wherein mud pulse telemetry signals are decoded from the annulus pressure signals (as opposed to the standpipe pressure signals). The data bearing signals are enhanced by combining the annulus pressure signals and standpipe pressure signals using addition, multiplication or correlation techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.