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. 09, 2003
Filed:
Feb. 08, 2001
Applicant:
Inventors:
James T. Aumann, Salt Lake City, UT (US);
Craig R. Hyland, Magna, UT (US);
Assignee:
Japan National Oil Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 2/500 ; E21B 4/900 ;
U.S. Cl.
CPC ...
E21B 2/500 ; E21B 4/900 ;
Abstract
A pressure and temperature core sampler comprises a tool for recovering cores specifically enabling the evaluation of methane hydrate resources. Because methane hydrate tends to decompose under conditions of pressure decrease and/or temperature increase as the samples are retrieved to the surface, a coring tool in accordance with the present invention provides a self-contained system for retrieving core samples at or near in situ pressure while cooling the core sample. The coring tool is preferably a wire line retrievable device that provides for nearly continuous coring during the drilling operation.