Invention Grant
- Patent Title: Spear method for retrievable pig
- Patent Title (中): 可回收猪的矛法
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Application No.: US12231279Application Date: 2008-09-02
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Publication No.: US07644463B1Publication Date: 2010-01-12
- Inventor: James Robert Crawford , Benton Frederick Baugh
- Applicant: James Robert Crawford , Benton Frederick Baugh
- Main IPC: B08B7/00
- IPC: B08B7/00
Abstract:
The method of retrieving a pig which is stuck in a pipeline including the steps of piercing the pig, establishing a circulation from the near end to the far end of the pig, gripping the central portion of the pig, and pulling the pig back to the proximate end of the pipeline.
Information query
