DRILL STRING ELEMENT TRANSFER MECHANISM
United States Patent 3506075
US Patent References:
Tongs for coupling and uncoupling drill pipe joints
- - 2737839
Transfer mechanism for the drill pipe of an oil field drill rig
- - 3061011
Racking mechanism for earth boring equipment
- - 3177944
Pipe tongs
- - 3316783
Tongs for coupling and uncoupling drill pipe joints
- - 2737839
Transfer mechanism for the drill pipe of an oil field drill rig
- - 3061011
Racking mechanism for earth boring equipment
- - 3177944
Pipe tongs
- - 3316783
Inventors:
Attebo, Kurt Anders Gustav
Publication Date:
04/14/1970
View Patent Images:
Export Citation:
Assignee:
ATLAS COPCO AB
Primary Class:
Other Classes:
173/189, 414/22.650, 175/85, 81/52
International Classes:
E21B7/02; E21B19/14; E21B19/20; E21B19/00; E21B19/14