Parameterization design method for special threaded connector of oil casing pipe
A parametric design, special thread technology, applied in special data processing applications, casing, design optimization/simulation, etc., can solve problems such as large geometric modeling, and achieve the effect of reducing workload and improving work efficiency
Inactive Publication Date: 2017-02-22
HOHAI UNIV CHANGZHOU
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Problems solved by technology
[0003] In order to overcome the defects of the existing structural design method for special threaded joints of oil casings, the present invention proposes a parametric design method for threaded joints of oil casings, which solves the problem of finite element analysis of the sealing performance of special threaded joints of oil casings. The workload of geometric modeling is relatively large, which greatly improves work efficiency
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Embodiment 1
[0039] Such as figure 1 The joint parameters of the special threaded joints of the oil casing shown are:
[0040] The bearing surface angle is -3°, the guide surface angle is 10°, the tooth height of the outer thread of the pipe is 1.575mm, the tooth height of the inner thread of the coupling is 1.775mm, the thread pitch is 5.08mm, 5 teeth / 1 inch, and the thread taper is 1:16; The sealing structure adopts the main sealing structure of cone surface / cone surface and the auxiliary sealing structure of -15° reverse torque shoulder. The sealing surface forms an angle of 20° with the horizontal direction, which can ensure that the joint has a large enough contact area and contact pressure, and the sealing performance is good. , The torque shoulder is used as the positioning control of the make-up, which ensures that the threaded contact part and the sealing surface contact part can be matched accurately, and at the same time ensures that the interference of the sealing structure can...
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The invention discloses a parameterization design method for a special threaded connector of an oil casing pipe. The method comprises the following steps of determining geometric parameters according to a drawing size, and building an initial connector two-dimensional geometric model by utilizing a relationship between a geometric constraint and a size constraint in a sketch interface of UG software; establishing a geometric expression which comprises expression names corresponding to the geometric parameters and an expression initial value, and performing driving to generate an initial graph; replacing geometric parameter values in the initial graph with the expression names in the geometric expression; selecting required geometric parameters from the geometric expression, creating a component family form, and filling geometric parameter values related to a connector pipe body and coupling; and selecting required connector components in a component family, and automatically generating a connector geometric model corresponding to the connector components. According to the method, parameterization design of a connector structure is realized based on a parameterization design method for a sketch by utilizing three-dimensional modeling software, so that while the workload of connector geometric modeling is greatly reduced, the working efficiency and the accuracy of finite element analysis can be improved.
Description
technical field [0001] The invention belongs to the field of oil casing structure design, and in particular relates to a parametric design method for a special threaded joint of the oil casing. Background technique [0002] In recent years, oil and gas wells under complex working conditions have been continuously developed and used. API oil casings can no longer meet the market demand, and there is an urgent need for oil casings with special threaded joints with high performance. The thread of the special threaded joint is improved and optimized on the basis of the partial trapezoidal thread, and the metal-to-metal sealing structure is designed, including the main sealing structure and the auxiliary sealing structure, which not only improves the connection strength, but also maintains good sealing under complex loads. performance. Special threaded joints can be divided into joints with couplings and joints without couplings according to the presence or absence of couplings....
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Login to View More IPC IPC(8): G06F17/50E21B17/02E21B17/042
CPCE21B17/02E21B17/042G06F30/17G06F30/20
Inventor 李堑刘卫博纪爱敏樊鑫业支佩许才斌
Owner HOHAI UNIV CHANGZHOU