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Screwed joint based on position control

A technology of threaded joints and threads, which is applied in the field of threaded joints based on position control, to avoid the problem of overtightening

Pending Publication Date: 2021-11-05
XIAN COMPWELL ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical solution involved in this patent document achieves a limiting effect by changing the processing technology or thread shape to reduce the risk of joint sticking, but it has certain processing difficulties

Method used

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  • Screwed joint based on position control
  • Screwed joint based on position control
  • Screwed joint based on position control

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Embodiment Construction

[0034] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0035]A threaded joint based on position control, including a male thread and a female thread. The cross-sectional shape of the male thread and the female thread is a trapezoidal thread, a rectangular thread or an inverted trapezoidal thread; in the thread structure, the tooth top is parallel to the tooth bottom, and the tooth side is parallel to the tooth The angle between the top or tooth bottom is ≥80°, the thread taper is 1:8~1:14, the thread tooth height is 1.0mm~1.6mm, and the pitch is 6mm / tooth~8mm / tooth. The section of the male thread and the female thread gradually changes along the helical direction of the thread, showing that the tooth height remains unchanged, the tooth width of the male thread gradually increases, and the tooth width of the female thread gradually decreases. The change rate of the tooth width of the male thread and...

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Abstract

The invention discloses a screwed joint based on position control. The screwed joint comprises a male thread and a female thread, wherein the cross section of the male thread and the cross section of the female thread are trapezoidal threads or rectangular threads or inverted trapezoidal threads; in the thread structure, the tooth top is parallel to the tooth bottom, the included angle between the tooth side and the tooth top or the tooth bottom is larger than or equal to 80 degrees, the thread taper is 1: 8-1: 14, the thread tooth height is 1.0-1.6mm, and the thread pitch is 6-8mm / tooth. According to the screwed joint, the special thread structure form is adopted, so that the pipe screwing position control in the screwing process is realized; by the adoption of the structure mode, the problem that an existing API screwed joint is excessively screwed can be avoided; and meanwhile, the problems that a conventional special screwed joint needs special torque equipment for screwing and is complex to operate can be solved.

Description

technical field [0001] The invention relates to the field of oil pipe construction machinery, in particular to a threaded joint based on position control. Background technique [0002] Oil pipes are mainly used for oil and gas well drilling and oil and gas transportation. It includes oil drilling pipe, oil casing, oil extraction pipe. Oil drill pipe is mainly used to connect drill collars and drill bits and transmit drilling power. The oil casing is mainly used to support the well wall during the drilling process and after the well completion, so as to ensure the drilling process and the normal operation of the entire oil well after the well completion. The oil suction pipe mainly transports the oil and gas at the bottom of the oil well to the surface. [0003] Oil casing is the lifeline to keep oil well running. Due to the different geological conditions, the downhole stress state is complex, and the combined effects of tension, compression, bending and torsional stress...

Claims

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Application Information

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IPC IPC(8): E21B17/042
CPCE21B17/0426
Inventor 宋延鹏张冬杰
Owner XIAN COMPWELL ENERGY TECH
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