Reinforcement for arched type structure with beveled screwed ends
US7364203B2 · kind B2 · utility
0Cited by
14References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2006 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Feb 15, 2026 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An electrical isolation connector subassembly for interconnecting adjacent tubular drill rods of a drilling system used in drilling bore holes in earth formations, the connector comprising an electrically insulative sleeve being sandwiched between two electrically isolated subassembly components, the sleeve providing an exterior gap between the edges of the spaced apart electrically isolated components, the exterior gap having a width of less than 50 cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.