An experimental device and method for a wellhead connector large-load tension-compression bending test

Abstract

The invention relates to a wellhead connector large-load pulling, pressing and bending testing experiment device and method. The device is characterized by comprising an auxiliary tool system, a hingeforce amplifying structure system, a hydraulic power loading system, an input data collection and analysis system and an output data collection and analysis system, the auxiliary tool system is arranged on an existing wellhead connector system, the hinge force amplifying structure system is connected with the auxiliary tool system and provides output load to the same, the hydraulic power loadingsystem is connected with the hinge force amplifying structure system and provides input load for the same, the input data collection and analysis system is arranged on hinge force amplifying structures and collects strain force on the same as actual input load, and the output data collection and analysis system is arranged on the wellhead connector system and collects strain force in the same as actual output load. The device can be widely applied in the technical field of underwater oil-gas exploitation.

Description

technical field [0001] The invention relates to the technical field of underwater oil and gas exploitation, in particular to an experimental device and an experimental method for a large-load tension-compression bending test of a wellhead connector. Background technique [0002] The subsea Christmas tree is an oil production system composed of valves, pipelines, connectors and accessories placed on the submerged wellhead on the seabed, and the subsea Christmas tree wellhead connector is an important part of the subsea Christmas tree, which can Connect underwater production facilities such as subsea trees to subsea wellheads to seal the connection between subsea trees and subsea wellheads, prevent oil and gas leakage, and carry internal and external loads. The wellhead connector and the subsea tree are generally connected by a special trapezoidal thread, and the special trapezoidal thread has better pressure bearing capacity. However, due to the swing or vibration of the pip...

AI Technical Summary

Problems solved by technology

[0003] At present, there are a large number of comprehensive test devices for tension, compression and bending in China. Chinese patent document 200520029374.2 proposes a multi-functional testing machine platform component, which can add various auxiliary devices on the platform to achieve multiple loads under the four loads of tension, compression, bending and torsion. material and structure tests, but the experimental setup failed to take component errors into account

Chinese patent document 201420622826.7 proposes a mechanical experimental device that can perform various experiments such as the measurement of the normal bending stress of the beam, the combined deformation of the compression and bending, the measurement of the internal force of the truss, the measurement of the internal force of the statically indeterminate structure, and the measurement of the internal force of the hyperstatically indeterminate structure. Although the experiment considers the influence of manufacturing error, it cannot realize the experiment of larger load

[0004] 1. When conducting different experiments, it is usually necessary to make different experimental devices, which increases the cost of the experimental site and experiment, and reduces the efficiency of the experiment

[0005] 2. When doing large load experiments, a large input load is required to complete the task, and the requirements for the load input system are high, which will also increase the cost of the experiment

[0006] 3. In terms of measurement, the existing tension-compression bending test device usually only considers the deformation measurement of the tested piece, but does not consider whether the input load meets the requirements

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