Patent · US Active

Method and apparatus for cementing a liner in a borehole using a tubular member having an obstruction

US8307898B2 · kind B2 · utility

2Cited by

6References

41Claims

0Family size

Assignees

BP CORPORATION NORTH AMERICA INC. · US
Baker Hughes Holdings LLC · US

Inventors

Mark Johnson · Anchorage, US
Robert Harris · Christchurch, GB

Key dates

Filing date	Dec 17, 2009
Grant date	Nov 13, 2012
Priority date	—
Expiry date	Sep 11, 2030

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B33/165
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A method and apparatus are disclosed for cementing a liner in place in an open borehole using a tubular member having at least one obstruction in the tubular member to pass the cement into the liner and through the liner into an annular space surrounding the liner to position the liner in the open borehole.

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