当液压传动系统使链转动时，夹块将挠性管柱送入井内或将它从井内带出。
As the hydraulic drive system rotates the chains, the gripper blocks feed the tubing string into, or out of the well.
固定在挠性管注入头的传动链上的定型块。
The profiled blocks attached to the drive chains of a coiled tubing injector head.
它们相对成双排列，以便将挠性管柱紧固在注入头的链中。
The gripper blocks are arranged in opposing pairs to secure the coiled tubing string in the injector-head chains.
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