Invention Grant
- Patent Title: Frangible core barrel
- Patent Title (中): 易碎的核心桶
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Application No.: US14242325Application Date: 2014-04-01
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Publication No.: US09540896B2Publication Date: 2017-01-10
- Inventor: Alan Grant Norrie , Khoi Trinh , Rahul Patel
- Applicant: National Oilwell Varco, L.P.
- Applicant Address: US TX Houston
- Assignee: National Oilwell Varco, L.P.
- Current Assignee: National Oilwell Varco, L.P.
- Current Assignee Address: US TX Houston
- Agency: Porter Hedges LLP
- Agent Derek V. Forinash
- Main IPC: E21B25/10
- IPC: E21B25/10 ; E21B25/00
Abstract:
A coring assembly comprises an outer barrel coupled to a coring bit. An inner barrel is disposed within the outer barrel. An inner sleeve is disposed within the inner barrel and includes at least one frangible region that allows the inner sleeve to break so that coring operations can continue after the occurrence of a core jam.
Public/Granted literature
- US20150275604A1 FRANGIBLE CORE BARREL Public/Granted day:2015-10-01
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