Down-hole Safety Valve

Down-hole Safety Valve

  1. Brief introduction
    Down-hole safety valve is one type of control device for well liquid abnormal flow. It has self-balance structure, which could close automatically in emergency to control liquid flow in well. Self-balance structure is made by anti-corrosion material and guarantee to supply security in emergency, which could lower influence for integrity and reliability of safety valve.
  1. Structure feature
    Tubing retrievable butterfly type safety valve is open by hydraulic control pipeline, close by spring, hydraulic power, spring compression etc. Apply butterfly structure and surface pressure, hydraulic oil through pressure hydraulic control pipeline to hydraulic port till to floating piston, push piston to down movement and compress spring, open valve or ball valve. Safety valve keeps open as holding hydraulic pressure. Release hydraulic control pipeline pressure, spring tension push floating piston upward, valve flapper or valve ball is closed. Circulating port area of butterfly type safety valve is full size, which is suitable for high production oil & gas well by large flow.
  1. Technical specification
    OD (mm) ID (mm) Length (mm) Max. working pressure (MPa) Working temperature Service circumstances
    Ф127 Ф46 1642 70 -29℃~+190℃ Mud, crude oil and natural gas, which without H2S
    Ф142 Ф20 2260

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