Research on Hydraulic Control Ball Valve Technology of Subsea Tubing Hanging into Pipe String System
The subsea string is the primary safety barrier for well control during completion operations.When well safety risks occur,the subsea string can be shut down in an emergency by controlling the hydraulic control ball valve,or the flexible pipe string such as coiled tubing,cable and steel wire can be cut,and the response time of good control can be improved.The design and manufacturing technology of the ball valve body assembly is the key technology to realise the sealing of the hydraulic control ball valve after cutting the flexible measuring pipe string.Based on the design structure,material selection and surface treatment process of ball valve body assembly,this paper describes the key technology of realizing the shear seal of hydraulic control ball valves,and provides a feasible ball valve body assembly structure and manufacturing process scheme.The research results of this paper have a guiding significance for the domestic research and field application of the subsea pipe hanger feed string technology.
tubing hanging into pipe string systemhydraulic control ball valvecutting
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