semi submersible drilling unit |
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| navigate by keyword : asia beam boom chain clouds column crane cumulus design drilling endurable engineering equipment foam gas handrails hold horizon industry leg lines mechanical metal offshore oil operations petroleum pipe piping post powerful rig ripple rope rust sea semi sky stabilize strong submersible support thick unit vietnam waves wires work |
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| Columns of semi-submersible drilling unit supporting the unit during offshore operations for oil and gas. Taken offshore Vietnam. |
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