Well cementing using permeable cement
US5339902A · kind A · utility
78Cited by
22References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1993 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Apr 2, 2013 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/261
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of cementing a well casing or liner in a well bore wherein an annulus exists around the exterior of the casing or liner. The method comprises the step of placing a foamed cement slurry composition in the annulus. A method of treating a well bore comprising the steps of: (a) filling an uncased portion of the well bore with a foamed cement slurry composition; (b) allowing the cement composition to harden; and (c) drilling a hole through the hardened cement composition along at least a portion of the uncased portion of the well bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.