Invention Grant
- Patent Title: Top drive with shaft seal isolation
- Patent Title (中): 顶部驱动器与轴封隔离
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Application No.: US12001484Application Date: 2007-12-11
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Publication No.: US07748445B2Publication Date: 2010-07-06
- Inventor: Lawrence Edward Wells , Preston R. Fox , Darrin Lynn Yenzer
- Applicant: Lawrence Edward Wells , Preston R. Fox , Darrin Lynn Yenzer
- 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: Williams, Morgan & Amerson, P.C.
- Main IPC: E21B19/22
- IPC: E21B19/22
Abstract:
A top drive system for wellbore drilling operations, the top drive system including a main shaft having an upper shaft seal system with a raised platform for supporting the seal system. The top drive may also have a shroud for covering the seal(s), and contaminants may flow down from the seals, since the seals are raised by the platform.
Public/Granted literature
- US20080210437A1 Top drive with shaft seal isolation Public/Granted day:2008-09-04
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