Patent Number: 6,305,482

Title: Method and apparatus for transferring core sample from core retrieval chamber under pressure for transport

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.

Inventors: Aumann; James T. (Heber City, UT), Hyland; Craig R. (Magna, UT)

Assignee:

International Classification: E21B 25/08 (20060101); E21B 25/00 (20060101); E21B 049/00 ()

Expiration Date: 10/23/2018