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gripper blocks

1. n. [Well Workover and Intervention]

The profiled blocks attached to the drive chains of a coiled tubing injector head. The gripper blocks are arranged in opposing pairs to secure the coiled tubing string in the injector-head chains. As the hydraulic drive system rotates the chains, the gripper blocks feed the tubing string into, or out of the well.

See: coiled tubingcoiled tubing stringinjector head

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