Auto-extending/retracting electrically isolated conductors in a segmented drill string
US6655464B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2001 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Dec 26, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/0232
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A system includes a drill string for at least partial use in the ground made up of a plurality of connectable pipe sections to align the innermost passages of attached ones of the sections. An assembly is provided including a pair of adapters for installation of a first one of the adapters in a first end of the innermost passage each pipe section and installation of a second one of the adapters in a second end of each section. The first adapter defines a first electrical contact area and the second adapter defines a second electrical contact area. The adapters are configured for resiliently biasing the first and second contact areas against one another between attached ones of the pipe sections to establish an electrical connection between the pair of adapters to complete an electrically conductive, isolated path extending through the drill string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.