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Experiment device for testing fatigue life of threading connector of petroleum drill

A threaded joint and fatigue life technology is applied in the field of experimental devices for testing the fatigue life of full-size oil drilling tool threaded joints, and can solve the problem of not being able to test the fatigue life of full-scale drilling tools.

Inactive Publication Date: 2012-04-11
SOUTHWEST PETROLEUM UNIV
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AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide an experimental device for testing the fatigue life of threaded joints of oil drilling tools, to solve the problem that the fatigue life test cannot be carried out on full-scale drilling tools, and to provide experiments for studying the fatigue fracture mechanism of oil drilling tools and evaluating the performance of new threaded joints in accordance with

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  • Experiment device for testing fatigue life of threading connector of petroleum drill
  • Experiment device for testing fatigue life of threading connector of petroleum drill
  • Experiment device for testing fatigue life of threading connector of petroleum drill

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Embodiment Construction

[0014] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0015] see figure 1 , the present invention includes: base 10, guide rail 12, motor 1, coupling 2, floating bearing 3, spherical roller bearing 4, fixed end spring clamps 5 and 5', bending moment applying devices 6 and 6', deflection measurement Instrument 11, tailstock 8, counter 9. Install the motor 1 at one end of the base 10; the motor 1 is connected with the coupling 2; the coupling 2 is sequentially connected with the floating bearing 3 and the spherical roller bearing 4; the fixed end of the head is set at one end of the spherical roller bearing 4 Spring clamp 5; Tailstock 8 is placed on the other end of the base 10, and the tail fixed end spring clamp 5' is connected with the tailstock 8; two fixed end spring clamps 5, 5' at the head and tail respectively fix the two ends of the drilling tool sample 7 And apply torque; the bending moment app...

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Abstract

The invention provides an experiment device for testing fatigue life of threading connector of petroleum drill, which comprises a base, a guide rail, a motor, a coupler, a floating bearing, an aligning roller bearing, a fixing end spring clamp, a bending moment applying device, a flexivity measuring instrument, a tail seat and a counter. Bending stress can be applied to the threading connector of the drill by the bending moment applying device based on four-point bending principle. The fixing end spring clamp is driven by the motor to rotate, so the threading connector of the drill can be rotated under certain torsion moment. Therefore, composite alternating stress working conditions of drill under well can be truly simulated. The experiment device is suitable for test research on fatigue life of full-size drill.

Description

technical field [0001] The invention relates to an experimental device for testing the fatigue life of threaded joints of full-scale oil drilling tools in oil drilling equipment. Background technique [0002] In the process of oil and natural gas drilling, oil drilling tools connected by threaded joints are the main tools for transmitting power and transporting mud. During the drilling process, the threaded joint of the drilling tool collides with the well wall, and works under the condition of axial tension, bending moment and torque compound alternating stress, which often becomes the weakest link in the entire drill string. Among the many drill tool fracture accidents in oil and natural gas drilling, many are caused by fatigue damage. And once the accident of drill tool fatigue fracture occurs, it will cause great economic loss. [0003] Therefore, it is of great significance to study the fatigue failure mechanism of oil drilling tools. Existing fatigue testing machine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/32
Inventor 林元华曾德智严仁田刘飞施太和朱红钧朱达江王其军周莹谢娟
Owner SOUTHWEST PETROLEUM UNIV
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