Patent · US Active

Method and apparatus for wellbore centralization

US10570675B2 · kind B2 · utility

1Cited by

4References

20Claims

0Family size

Assignee

Blackhawk Specialty Tools, LLC · US

Inventors

Ron D. Robichaux · Houma, US
John E. Hebert · Houma, US
Scottie J. Scott · Houma, US

Key dates

Filing date	Jan 6, 2017
Grant date	Feb 25, 2020
Priority date	—
Expiry date	Apr 15, 2037

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B33/14
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A centralizer assembly installed on a casing section. A bow spring assembly having bow spring members is installed around the outer surface of the casing section and can rotate about the outer surface of the casing section. A portion of the casing section that is aligned with the bow spring assembly is swaged to increase the outer diameter of that section. Bow spring heel supports prevent bow spring members from contacting the outer surface of the central casing section when compressed. Non-abrasive materials prevent damage to wellhead or other polished bore receptacles.

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