Electrically insulating gap subassembly for downhole electromagnetic transmission
US6439324B1 · kind B1 · utility
22Cited by
23References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2000 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Mar 30, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/0285
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electrically insulating gap subassembly for inclusion in a pipe string (30) comprising a pair of tubular members (90, 98) having an electrically insulating isolation subassembly (94) threadably disposed therebetween is disclosed. The electrically insulating isolation subassembly (94) has an anodized aluminum surface that provides electrical isolation to interrupt electrical contact between the two tubular members (90, 98) such that electromagnetic waves (46, 54) carrying information may be generated thereacross.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.