Invention Grant
- Patent Title: Preperforation apparatus for wells
- Patent Title (中): 井的先导装置
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Application No.: US37966064Application Date: 1964-07-01
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Publication No.: US3313351APublication Date: 1967-04-11
- Inventor: WIDMYER RICHARD H
- Applicant: TEXACO INC
- Assignee: Texaco Inc
- Current Assignee: Texaco Inc
- Priority: US37966064 1964-07-01
- Main IPC: E21B43/11
- IPC: E21B43/11 ; E21B43/14
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