Deep well instrumentation
US6568481B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 4, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | May 4, 2021 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B47/09
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A fiber optic instrumentation line is introduced down a hydrocarbon (oil) well bore 12 by control line 16 formed by pressure tubing conduit fixed on the outside of intermediate casing 14 and set in cement slurry 21 between casing 14 and surrounding rock 13 and reaching to the hydrocarbon production zone 15. Hollow primary member 18 accepts distal end of control line 16 at the end of casing 14. Secondary member 22 having sealed terminal control line 27 on its outer surface is lowered through primary member 18 to zone 15, automatically angularly aligning and engaging respective top and bottom end couplings 24 and 20, sealing together a respective top and end of terminal control lines 27, 16 forming a continuous, high pressure, fiber optic receiving tube, from well head 10 to well bottom. Alternatively, two lines 16 linked by loop 26 provide a continuous control line returning to the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.