Sealed threaded joint for oilfield pipes

摘要: The invention relates to oil and gas well building can be used in process casing pipes. inventive sealed threaded joint for oilfield pipes comprises female male provided with conical threads sealing thrust surfaces. surfaces are brought into contact a radial direction. embodied on the external surface of three end section pipe internal between thread body, respectively. form face, angle cone which is 5°≤β≤25°in direction axis, mating where first said transforms body thereof, profile has negative along bearing face. height less than pipe. at beginning seal shaped sphere. Said makes it possible increase reliabilityand tightness bending deformation conditions.