Apparatus for wellbore communication
US7730968B2 · kind B2 · utility
12Cited by
57References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2008 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Aug 19, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/13
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods and apparatus for communicating between surface equipment and downhole equipment. One embodiment of the invention provides a wellhead assembly that allows electrical power and signals to pass into and out of the well during drilling operations, without removing the valve structure above the wellhead. Another embodiment of the invention provides an electromagnetic casing antenna system for two-way communication with downhole tools. Another embodiment of the invention provides an antenna module for a resistivity sub that effectively controls and seals the primary/secondary interface gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.