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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