Invention Grant
- Patent Title: Lubricating washpipe system and method
- Patent Title (中): 润滑水管系统及方法
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Application No.: US12587146Application Date: 2009-10-02
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Publication No.: US08225858B2Publication Date: 2012-07-24
- Inventor: William D. Martin
- Applicant: William D. Martin
- Agent Sue Z. Shaper
- Main IPC: E21B19/00
- IPC: E21B19/00
Abstract:
The invention relates to washpipes for use in drilling operations such as drilling for oil and gas, and more particularly to an auto lubricating washpipe and liner system and method.
Public/Granted literature
- US20100101797A1 Lubricating washpipe system and method Public/Granted day:2010-04-29
Information query
