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. 14, 1987
Filed:
Dec. 27, 1985
Applicant:
Inventor:
Roderick D McLeod, Edmonton, Alberta, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166 72 ; 166 82 ; 166196 ;
Abstract
A concentric mandrel assembly for use in a wellhead isolation tool is operable from outside the wellhead and casing. An outer mandrel of the assembly carries a packoff nipple, including a resilient seal member, on its lower end and the inner mandrel of the assembly carrier carries an expander on its lower end. Means are provided for axially moving the mandrels relative to one another so that the expander can apply outward force on the resilient seal against the wall of a well casing.