Invention Grant
- Patent Title: Coiled tubing injector with limited slip chains
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Application No.: US14852492Application Date: 2015-09-11
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Publication No.: US09458682B2Publication Date: 2016-10-04
- Inventor: David W. McCulloch , Timothy S. Steffenhagen , William B. White , William G. Stewart
- 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: E21B19/08
- IPC: E21B19/08 ; E21B19/22 ; E21B17/20
Abstract:
A coiled tubing injector comprises a drive system for independently driving a plurality of chains independently but otherwise retarding relative motion between the driven chains when a chain begins to slip uncontrollably.
Public/Granted literature
- US20160002987A1 Coiled Tubing Injector With Limited Slip Chains Public/Granted day:2016-01-07
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