The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2017
Filed:
Mar. 04, 2013
Well Techonology As, Tananger, NO;
Arne Gunnar Larsen, Sandnes, NO;
Patrick Andersen, Hafrsfjord, NO;
Roy Inge Jensen, Stavanger, NO;
Arnt Olav Dahl, Randaberg, NO;
Morten Myhre, Tananger, NO;
Well Technology AS, Tananger, NO;
Abstract
A method is for removing casing from a well. The method includes setting a first sealing element into fluid-sealing engagement with the inside of the casing, lowering a flow-through string into the well, a cutting tool and a second, reversibly expandable sealing element being connected to the string, forming perforations into the casing by means of said cutting tool, expanding the second, expandable sealing element into fluid-sealing engagement with the inside of the casing, passing a pressurized fluid through the string and into the annulus via the perforations, so that the viscous and/or solid mass is displaced up the annulus, cutting the casing around its entire circumference; and pulling a length of the casing up from the well.