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Blade and method for processing special screw thread of oil sleeve pipe

A special thread and oil-casing technology, applied in the field of processing and manufacturing, can solve problems such as poor thread accuracy, fast tool wear, and low processing efficiency, and achieve the effects of reducing production costs, increasing benefits, and improving production efficiency

Active Publication Date: 2016-09-14
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a special thread processing blade and processing method for oil casing pipe, so as to solve the problems of fast tool wear, low processing efficiency and poor thread precision in the existing special thread processing of oil casing pipe

Method used

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  • Blade and method for processing special screw thread of oil sleeve pipe
  • Blade and method for processing special screw thread of oil sleeve pipe
  • Blade and method for processing special screw thread of oil sleeve pipe

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0027] Such as figure 1 As shown, a certain type of casing joint adopts a special thread, the thread is a partial trapezoidal thread with a negative load-bearing surface, the angle of the tooth-shaped guide surface is 8°, the angle of the load-bearing surface is -5°, the tooth height is 1.62mm, and the pitch is 5.08mm. The taper of the thread is 1:16, and the end of the thread is provided with a sealing surface and a torque shoulder. The thread on the negative bearing surface makes the threaded joint have stronger anti-tripping performance, thus ensuring the connection integrity of the joint unde...

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Abstract

The invention discloses a blade and a method for processing a special screw thread of an oil sleeve pipe. The blade and the method for processing the special screw thread of the oil sleeve pipe relate to the technical field of processing and manufacturing. The blade comprises a screw thread body turning tool and a screw thread outline turning tool; outline shapes of cutting edges of the screw thread body turning tool and outline shapes of cutting edges of the screw thread outline turning tool are the same; the outline shapes of the cutting edges of the screw thread outline turning tool are matched with a thread form outline line of the target special screw thread. The method comprises the steps of using the screw thread body turning tool to turn a thread form main body part of the target special screw thread; using the screw thread outline turning tool to turn a thread form outline of the target special screw thread at a time. The blade and the method for processing the special screw thread of the oil sleeve pipe provided by the invention solve the problems of quick cutting-tool wearing, low processing efficiency and poor turned screw thread precision during the existing processing of the special screw thread of the oil sleeve pipe.

Description

technical field [0001] The invention relates to the technical field of processing and manufacturing, in particular to a special thread processing blade for oil casing and a processing method. Background technique [0002] With the development of oil and gas fields entering a new stage, API threaded joints have been difficult to meet the high connectivity and sealing requirements of tubing and casing. Domestic and foreign tubing and casing manufacturers and scientific research institutions have intensified their efforts in special thread design and processing research. Enterprises from Valunec Mannesmann in Europe, Hunting Hunting in the United States, Hydril in the United States, and Tenaris in Argentina have developed various types of special threads for oil casings, while domestic Tianjin Pipe Company, Shanghai Baosteel, Valin Heng Steel, etc. have also developed special threads for oil casings with their own characteristics. The special thread structure is novel and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23G5/00B23B27/06B23G1/22
CPCB23B27/065B23G1/22B23G5/00
Inventor 闫凯杨红兵卫栋赵新伟杨专钊田新新王冬林
Owner BC P INC CHINA NAT PETROLEUM CORP
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