Method for making centralizers for centralising a tight fitting casing in a borehole
US7195730B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2001 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | May 29, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/1042
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Method for the centralization of drill casings in a tight borehole, both vertical and deviated, comprising the following operations: Application on the casing section in question, of an adherence strip equipped with one or more housings and rapid adjustable lever closure; Insertion of suitable molds in the housings of which the strip is equipped; Injection into the molds of plastic material characterized by a high mechanical resistance, a high degree of surface adhesion and resistance to abrasion by friction, and also in-place elasticity, higher than the elasticity of the casings; Removal of the adherence strip once the hardening of the plastic material in the shape of the mold, has been completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.