Logging Grease Injection Control Head
Grease Injection Control Head
A grease injection hole, a grease return hole, a gland hydraulic control hole and an overflow hole are arranged on the wireline grease injection control head, and six choke tubes are mounted in the main body. High-pressure high-viscosity sealing grease is injected in the clearance between the inner wall of the choke tube and cables through the lower grease injection hole, sealing grease is also filled in the clearance between the outer layer of the cable and a steel-wire armored layer. Since the clearance between the cable and the inner wall of the choke tube is very small, and the viscosity of sealing grease is very high, this can play the function of effectively sealing pressure fluid flow in wells or preventing air current from flowing upside. When high pressure sealing grease reaches the upper grease return hole through the clearance between the inner wall of a longer choke tube and a cable, the loss of resistance force leads the pressure of sealing grease to be zero almost, and the grease return hole plays the function of making sealing grease flow back and return.
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