Global Marine, Inc. drilling crew installing the torque arms onto the Bowen Power Sub on the drill floor of D/V Glomar Challenger (ship) during Leg 57 of the Deep Sea Drilling Project. The assembly will be lifted up the derrick with the torque arms running on guide rails, the rotation for the drill string was provided by the power sub. 1977.

• 1977

This digital image is a surrogate of an item from the SIO Deep Sea Drilling Project Records, 1961-1987

• Deep Sea Drilling Project

• Core Drilling
• Drilling and boring
• Scientific Expeditions

• image

• UC Regents

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2020-10-28