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. 27, 2016
Filed:
Mar. 14, 2013
Longyear Tm, Inc., South Jordan, UT (US);
George Iondov, Mississauga, CA;
LONGYEAR TM, INC., Salt Lake City, UT (US);
Abstract
A bushing for positioning within a core barrel assembly during an up-hole drilling operation. The bushing has a wall with an inner surface and an outer surface. The inner surface defines an inlet, an outlet, and a central bore of the bushing. The central bore surrounds a longitudinal axis of the bushing and extends between the inlet and the outlet. The outer surface has a first portion positioned proximate the inlet and a second portion positioned proximate the outlet. The first portion of the outer surface of the wall projects outwardly from the second portion of the outer surface relative to the longitudinal axis of the bushing such that the first portion of the outer surface defines opposed first and second shoulder surfaces extending substantially perpendicularly relative to the longitudinal axis. Core barrel head assemblies including such bushings are also described.