A test method and device for dynamic comprehensive performance of drill pipe used in coal mines

Abstract

The invention relates to a method and device for testing the dynamic comprehensive performance of drill pipes used in coal mines, belonging to the field of comprehensive performance tests of drill pipes used in coal mine drilling. Torque loading systems for simulating the force state of the power end of the drill pipe are respectively arranged at both ends of the test drill pipe and a load system for simulating the force state of the drilling end of the drill pipe, and an axial force loading system for loading a controllable axial load on the test drill pipe, which is used to simulate the radial displacement constraints and constraints on the drill pipe during loading construction. The radial restraint system for radial force loading, and the waterway loading system for high pressure or ultra-high pressure water pressure on the test drill pipe; can realize controllable and composite dynamic loading of the test drill pipe load, and simulate the drill pipe in the The comprehensive performance under the conditions of steady state and dynamic load of drilling construction, drill pipe whirl, drill pipe vibration and resonance, as well as revolution and rotation centrifugal force solves the comprehensive force and dynamic load model of drill pipe that cannot be simulated by the existing technology The problem.

Description

technical field [0001] The invention belongs to the field of comprehensive performance test of drill rods used in coal mine drilling, and relates to a dynamic comprehensive performance test method and device of drill rods used in coal mines. Background technique [0002] With the gradual increase in the construction depth of coal mine gas drainage drilling, geological advanced detection drilling, water disaster control and water exploration drilling, the control and operation methods are developing towards automation and unmanned development, and the quality and comprehensive performance of drill pipes are put forward. higher requirement. Therefore, it is necessary to test and test the fatigue life of the drill pipe under complex stress conditions and motion conditions, the stability of the drill pipe under comprehensive loads, and the strength of the drill pipe under various stress and motion conditions to test whether the drill pipe can meet the requirements of coal mines....

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Problems solved by technology

[0003] At present, the test methods for drilling tools used in coal mines mostly use the test devices and inspection methods for the torsional strength of tubular materials. There are no test devices and methods specially used for the comprehensive performance inspection of coal mine drilling tools. The test detection methods are single load loading and static load loading, which cannot simulate the real working conditions of the drill pipe, and cannot test the comprehensive performance of the test drill pipe such as fatigue life, dynamic response, sealing, vibration, and comprehensive force strength.

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