Special threaded buckle connector

Abstract

The invention relates to a special threaded buckle connector which comprises a female buckle and a male buckle with metal contact surfaces. The metal contact surfaces include thread partial contact and non-thread position contact. Thread partial contact includes the situations that the female buckle internal thread tooth top makes contact with the male buckle external thread tooth bottom and the bearing faces of internal and external thread teeth contact. Non-thread position contact includes the situations that sealed faces of internal and external threads contact, first conical surfaces of the internal and external threads contact, and step surfaces of the internal and external threads contact. After the threaded connector is tightened, the sealed faces of internal and external threads are in interference fit, and the sealing effect is achieved. According to the special threaded buckle connector, through an improved thread tooth structure and a certain distance existing between the positions of the sealed surfaces and the step surfaces, compared with the prior art, the special threaded buckle connector integrates the high properties of high connecting strength, high compression resistance, high torque resistance, high bending resistance, high temperature resistance and the like, on-site actual operation is facilitated, and the abnormal production time of companies of party A is reduced.

Description

technical field [0001] The invention relates to a special threaded joint, which is an improved partial trapezoidal thread and a high-performance special threaded joint with a certain distance between the sealing surface and the step surface. It is suitable for the oil and gas industry, especially for the comprehensive performance requirements of pipe joints. higher oil and gas wells. Background technique [0002] In recent years, as conventional oil and gas wells have become more and more difficult to exploit, unconventional oil and gas production has increased year by year, and thermal lava wells and combustible ice and other energy sources have been experimentally exploited, the comprehensive performance requirements for pipe joints have become increasingly demanding. high. [0003] Existing API (American Petroleum Institute) threaded joints and other special buckle joints can only meet one or several high performances, such as high tensile, high compression or both high ...

AI Technical Summary

Problems solved by technology

[0004] During the downturn in the oil and gas industry in recent years, various special buckle joints are currently in the field application stage. Due to the design structure, the sealing cone surface is often damaged by external hard substances, and during the buckle process, due to eccentric buckle Causes thread teeth to wear during make-up tightening

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