Drill string section with internal passage
US6634427B1 · kind B1 · utility
23Cited by
8References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 2002 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Drill string sections are provided comprising internal passages that may be used to facilitate the electrical or hydraulic connection of multiple devices, such as sensors, arranged at spaced apart positions along the length of the drill sections. Methods of manufacturing the drill string sections are also provided, wherein the internal passages are formed by a first passage, a second passage, and a connecting passage therebetween.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.