Deviated borehole drilling assembly
US6386287B2 · kind B2 · utility
10Cited by
12References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2001 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Jun 15, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S166/902
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A wellbore casing, including a casing section, for deployment in a subterranean wellbore. The casing section includes a pre-milled windowed opening. A liner is disposed within the casing section covering the window opening from the inside. In addition, a rigid material is disposed outside of the casing section covering the window opening. A filer is located intermediate the casing section and the liner. The liner, filler and rigid material prevent cement from affecting the window opening when the casing section is being cemented in the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.