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:
Nov. 11, 2003
Filed:
Sep. 14, 2001
Philippe Fanuel, Brussels, BE;
Halliburton Energy Services, Inc., Carrollton, TX (US);
Abstract
The invention concerns a core barrel, in particular for oil exploration, comprising a string, an external tube ( ) fixed at the front end of the string, a core bit mounted on a front section ( A) of the external tube, and an internal tube assembly ( ) mounted in the external tube and comprising hydrodynamic means transforming a core sampling line pressure into a load thrusting said assembly towards the core barrel front, the front section of the external tube being mounted axially sliding, limited by front and rear stop elements ( A, P), in a rear section ( P) of the same external tube to project therefrom longitudinally, the assembly comprising a support stop ( ) arranged to thrust selectively forward the front section of the external tube, means being arranged between the inner tube ( ) proper and said front section such that the latter can be driven in rotation about its longitudinal axis independently of said internal tube, a motor ( ) capable of driving the core bit in rotation relative to the string.