Invention Grant
- Patent Title: Core lifter
- Patent Title (中): 升降机
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Application No.: US12917774Application Date: 2010-11-02
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Publication No.: US08770320B2Publication Date: 2014-07-08
- Inventor: Christopher L. Drenth , Hongyan Zhang
- Applicant: Christopher L. Drenth , Hongyan Zhang
- Applicant Address: US UT South Jordan
- Assignee: Longyear TM, Inc.
- Current Assignee: Longyear TM, Inc.
- Current Assignee Address: US UT South Jordan
- Agency: Ballard Spahr LLP
- Main IPC: E21B10/02
- IPC: E21B10/02

Abstract:
A core lifter may be used in a drilling system. An exterior surface of the core lifter may include a plurality of longitudinally-oriented recesses. The core lifter may include a raised contact feature that may extend inwardly away from a gripping surface of the core lifter. The core lifter may include a flared skirt configured to limit movement of the core lifter relative to a core lifter case. The core lifter may be formed via stamping a sheet of material.
Public/Granted literature
- US20110100718A1 CORE LIFTER Public/Granted day:2011-05-05
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