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|1. (WO2018040283) COILED TUBING CLAMPING DEVICE AND INJECTION HEAD USING SAME|
|Applicants:||JIANGSU HEXIN PETROLEUM MACHINERY CO., LTD.
|Title:||COILED TUBING CLAMPING DEVICE AND INJECTION HEAD USING SAME|
Disclosed are a coiled tubing clamping device and an injection head using the clamping device. An inner surface of a clamping block (1) of the clamping device is a trapezoid-shaped clamping opening; the bottom of the clamping opening is arc-shaped, and clamping ribs and grooves (1-1) are alternatingly distributed on both sides of the clamping opening, wherein the clamping ribs comprise plastic clamping ribs (1-2) and rigid clamping ribs (1-3) that are arranged apart from each other, and the plastic clamping ribs (1-2) and the rigid clamping ribs (1-3) are alternatingly arranged. The clamping device may reduce wear and tear of the inner surface of the clamping block and damage to a coiled tubing, and may also increase clamping force of the clamping block in clamping a tubing, thereby improving the operational effect and work efficiency of the device, and extending the service life of the device.