Wellhead equipment is a device installed at the wellhead to control the pressure and direction of gas-liquid (oil, water, etc.) It seals each layer of tubing, casing, and annular space of the casing. It usually consists of casing head, tubing head, blowout preventer group, four-way valve, and bypass fittings. What are the installation requirements for wellhead equipment? Next, Jianhu Fulida Machinery Manufacturing Co., Ltd. will provide you with a detailed introduction!
The selection and pressure testing of wellhead equipment should be determined based on the construction high pressure designed for fracturing and acidizing. The nominal pressure of the selected wellhead device must be greater than or equal to the high pressure designed for construction. Before installation, a comprehensive pressure test must be conducted on the wellhead equipment, and only after passing the test can it enter the well. Oil wells are tested according to the water seal pressure test standard, while gas wells are tested according to the water seal pressure test standard.
2. Inspection and installation of casing short joints for wellhead equipment. The material and specifications of the casing short section at the corner of the impact well should be consistent with the casing connected inside the well. All annealed parts should be removed and not used to ensure the strength of the sleeve short section. The wellhead device buckle should be smooth and free of burrs, and the pressure test standard is 80% of the original manufacturer's pressure test value.
The wellhead device consists of a steam Christmas tree and a tubing head. The lower part of the conical tubing cross is connected to a 7 "bottom flange, and the upper part is connected to a Christmas tree.
The wellhead device is a double wing structure. The valve adopts the parallel gate structure commonly used in the world today. The valve body, valve cover, valve plate, and valve stem are all made of materials with good high temperature resistance and creep resistance. Therefore, the entire valve can withstand a high temperature of 380. Under high temperature and pressure, the valve will not deform when opened and closed. Non metallic seals are made of high-temperature resistant materials and have good sealing performance at 380 ° C.
A wellhead device for oil production, comprising a tee, a gate, a coupling, a short section, a flange, and a smooth rod seal. The upper flange of the wellhead device is connected to a lifting short section, and the lower part is provided with an outer cone. The wellhead device is precisely positioned and aligned with the inner cone of the upper part of the lower flange. The downhole string of the wellhead device is directly connected to the upper flange. There is an annular groove on the end face of the connection between the upper and lower flanges, and the sealing steel ring is installed in the groove of the wellhead device. The entire wellhead device has a simple structure, light weight, easy manufacturing, reliable sealing, and convenient use.
