Auxiliary equipment for downhole fittings of injection wells and water supply lines used to improve their performance in winter

Abstract

Abstract The article deals with two methods for eliminating freezing of injection wellhead fittings. The first method involves removing injected water from the well fitting under long well operation stoppage at negative ambient temperatures. Water is removed and air is supplied through the system of valves (a spring loaded valve and a float valve). When pumping water into the injection well, the float valve closes the access to the environment, and the spring-loaded valve is open for injected water. When the injection process stops, the spring-loaded valve supplies remaining water into the well fittings and the surface part of the water supply line and closes; the float valve opens. Air into the free space of the well fittings is supplied through the float valve thereby preventing the wellhead and the surface part of the water supply line from freezing. The second method is used to prevent the mouth of the injection well from freezing. A device is installed inside the casing, which allows heat to be accumulated in summer and winter. Accumulated heat is used to heat up the mouth when the water injection process stops.