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Patent Searching and Data


Title:
METHOD AND DEVICE FOR LOCKING OR RELEASING DRILL STEM
Document Type and Number:
Japanese Patent JPS5952089
Kind Code:
A
Inventors:
MARUKU RUMEERU
ROORAN RU ROTSUKU
Application Number:
JP7733983A
Publication Date:
March 26, 1984
Filing Date:
April 30, 1983
Export Citation:
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Assignee:
BURISONOO E ROTO MARIINU SA
International Classes:
E21B19/10; E21B19/16; (IPC1-7): E21B19/16