Hollow Polished Rod
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Hollow Polished Rod
Introduction
Hollow polished rod is a special polish rod which is produced for effective exploration of "high condensation, high viscosity and high wax " wells. It used for upper end of rod string, connecting with hollow sucker rod. Besides inject heat medium (hot oil, hot water and gas), chemical agent and heating cable into the channel to reduce oil viscosity and remove wax, it can also used for sand cut, slim hole and separate layer oil extraction. Meanwhile, it can be used for drive downhole PCP with its large rigidity and bearing high torque characteristic.
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