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:
Dec. 18, 2001
Filed:
Feb. 04, 2000
Applicant:
Inventors:
Ian Gillis, Leduc, CA;
Craig Knull, Leduc, CA;
Assignee:
Halliburton Energy Services, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 3/313 ;
U.S. Cl.
CPC ...
E21B 3/313 ;
Abstract
A pack-off bushing for placement inside an outer conduit while a fluid is passed through an inner conduit positioned within the outer conduit. The bushing includes a mandrel having a mandrel passage extending axially therethrough, a housing carried on the mandrel and capable of axial movement relative to the mandrel and a balancing system associated with the mandrel and the housing for applying a balancing force to the mandrel to oppose an axial mandrel force applied to the mandrel.