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:
Jul. 20, 2010
Filed:
Aug. 24, 2007
Graeme Mckay, Aberdeen, GB;
Graeme McKay, Aberdeen, GB;
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A wellhead removal tool features a rotary cutter run by a Moyno type progressive cavity pump that is powered by fluid pumped through it. The stator of the motor has a gripping device with a series of collets or slip inserts that have grip features that face outwardly. A support shoulder on the grip assembly cooperates with a j-slot connection to the stator to allow a cone to be moved under the collets to push them into a grip position below or in a selected portion of the wellhead where the grip will not damage the wellhead internal components. Fluid pumped through the downhole motor causes the casing cutter blades to extend and rotate to cut the casing.