Methods for completing subterranean wells
US9574419B2 · kind B2 · utility
3Cited by
13References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 27, 2012 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Oct 19, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/0285
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Methods for cementing a subterranean well comprise installing a casing string into a borehole, wherein the casing string comprises a metal having a coefficient of thermal expansion (CTE) lower than about 6×10−6/° C. A cement sheath is then placed between the exterior surface of the casing string and the formation wall. The low-CTE metal may reduce casing shrinkage when the well temperature falls during stimulation treatments, cyclic steam injection or when the well temperature reaches equilibrium at the top of a long casing string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.