Method and device for cementing a well or a pipe
US8091640B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 22, 2006 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jan 15, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/127
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Introducing within a well or pipe a mandrel equipped with an inflatable membrane which can expand radially under the effect of an internal pressure. Positioning the mandrel opposite the portion to be treated, in introducing a pressurized fluid within the membrane such that its end regions form annular bulges pressing firmly against the wall, whereas its mid-region expands to a lesser degree. Forming a peripheral annular space into which is then injected a cement which is liquid but able to harden. Leaving the cement to set so as to form a solid sleeve. Deflating the tubular membrane. Withdrawing the mandrel together with the deflated membrane. The method can be used in the oil sector, particularly for repairing and/or plugging a portion of casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.