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U.S. Department of Energy
Office of Scientific and Technical Information

Jack-up rig for marine drilling

Patent ·
OSTI ID:6149751

This invention relates to a mobile drilling platform of the jack -up type equipped with a special system which allows the said drilling platform to work as a drilling derrick and alternatively as a hoisting crane rig for marine service.

Assignee:
Petroleo Brasileiro S A Petrobras (Brazil)
Patent Number(s):
US 4269542
OSTI ID:
6149751
Country of Publication:
United States
Language:
English

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