Well stabilization tools and methods
US5823273A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1996 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Aug 6, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B34/142
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to tools and methods for stabilizing incompetent or otherwise unstable subterranean zones or formations penetrated by a well bore during drilling. The methods basically comprise drilling the well bore through an enlarged portion of an unstable subterranean zone or formation when it is encountered, pumping a hardenable cementitious material through the well stabilization tool while moving the tool through the enlarged portion of the well bore whereby the enlarged portion is filled with the hardenable cementitious material, allowing the cementitious material to harden and then drilling the well bore through the hardened cementitious material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.