Apparatus for wellbore communication
US7413018B2 · kind B2 · utility
40Cited by
55References
64Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2004 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Mar 24, 2025 |
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.