Invention Grant
US3190370A Drive and feed device for a string of rotary drill string elements
失效
用于一系列旋转钻柱元件的驱动和进给装置
- Patent Title: Drive and feed device for a string of rotary drill string elements
- Patent Title (中): 用于一系列旋转钻柱元件的驱动和进给装置
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Application No.: US18804462Application Date: 1962-04-17
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Publication No.: US3190370APublication Date: 1965-06-22
- Inventor: GUNNAR KVELLO-AUNE ALF , FREDRIK TROFTEN PER
- Applicant: ATLAS COPCO AB
- Assignee: Atlas Copco Ab
- Current Assignee: Atlas Copco Ab
- Priority: NO13987361 1961-04-17
- Main IPC: E21B3/02
- IPC: E21B3/02 ; E21B7/02 ; E21B19/00 ; E21B19/08 ; E21B21/00
Public/Granted literature
- US20240404154A1 DISPLAY RESPONSIVE COMMUNICATION SYSTEM AND METHOD Public/Granted day:2024-12-05
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