Patent · US Active

Centralizer

US9534456B2 · kind B2 · utility

5Cited by

7References

14Claims

0Family size

Assignee

STATOIL PETROLEUM AS · NO

Inventors

Morten Eidem · Trondheim, NO
Tore Weltzin · Stavanger, NO
Gaute Grindhaug · Stavanger, NO
Jafar Abdollahi · Trondheim, NO

Key dates

Filing date	Jan 7, 2011
Grant date	Jan 3, 2017
Priority date	—
Expiry date	Jun 3, 2032

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B17/1064
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A centralizer includes a centralizer body to be situated at the outer surface of a pipe string in the form of casing, liner, or the like used while drilling, the centralizer body being formed with a plurality of outer centralizer blades arranged in an inclined manner to the longitudinal axis thereof, wherein the centralizer body has an separate split inner tube secured to the pipe string by means of a press fit, and low friction inner surface of the centralizer body and separate center tube facing each other are made from low friction material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.