Coiled tubing conveyed milling
US7478687B2 · kind B2 · utility
18Cited by
36References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 2005 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Dec 23, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B27/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Milling in casing that is over 4½ inches is done with coiled tubing that is anchored against torque reaction. An improved debris catcher is part of the bottom hole assembly to capture cuttings from the milling. A thruster can be used to maintain weight on the mill during the milling. The coiled tubing supports a mud motor to drive the mill. Return fluid is separated from the cuttings and returned to the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.