Insulated drill collar gap sub assembly for a toroidal coupled telemetry system
US4496174A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1981 |
| Grant date | Jan 29, 1985 |
| Priority date | — |
| Expiry date | Jan 30, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L37/2445
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An insulated drill collar gap sub assembly for a toroidal coupled telemetry system including a first annular sub member (150) operable to be connected at one end to a drill collar and a second annular sub member (156) operable to form a part of a drill collar sub. The first and second annular sub members have interconnecting structural members (54, 58) operable to structurally interfere. The interconnecting structural members are dimensioned to form a continuous gap (160) between mutually opposing surfaces and a dielectric material (162) fills the gap to electrically isolate the first annular sub member with respect to the second annular sub member. A bearing member (164) is positioned between the first annular member and the second annular member and is coated with a dielectric insulation (166) to facilitate the formation of a drill collar gap sub assembly of structural and electrical integrity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.