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:
Feb. 19, 1991
Filed:
Oct. 25, 1989
Applicant:
Inventor:
Roderick D McLeod, Edmonton, Alberta, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166 72 ; 166 96 ; 166196 ; 166387 ;
Abstract
A wellhead isolation tool is presented which includes an expanding nipple operable from outside the wellhead and casing, the nipple and its concentric mandrels being inserted into the wellhead and thus down through the wellhead array and into the casing or tubing by a single hydraulic cylinder and then the nipple expanded and sealed in the casing or tubing. The cylinder and its support rods may be removed when the nipple and mandrels are in place.