Hole bottom vibration simulation test bed

Abstract

The invention provides a hole bottom vibration simulation test bed which comprises an upper shock excitation source, a lower shock excitation source, a supporting rack and a measure and control unit. The upper shock excitation source is arranged on the supporting rack, the lower shock excitation source is arranged below the supporting rack, a simulation drilling tool is arranged in the supporting rack, the upper end of the drilling tool is connected with the upper shock excitation source, the lower end of the drilling tool makes contact with the lower shock excitation source, and the measure and control unit is arranged on the drilling tool. According to the hole bottom vibration simulation test bed, upper drilling tool vibration is mainly simulated through an upper electromagnetism vibration exciter, the vibration generated by the action of a drill bit and the stratum is simulated through a curved face plate structure of a lower variable frequency motor, damp restraint simulating devices for different hole walls and bottom drilling tool restraint simulating devices are arranged, and a testing system capable of detecting multiple kinds of performance parameters in real time is allocated. The hole bottom vibration simulation test bed can enable experimental studies to be carried out on the vibration characteristics of the bottom drilling tool, the vibration attenuation characteristics of an under-hole damper, the propagation characteristics of vibration waves in a drilling rod in a laboratory state.

Description

technical field [0001] The invention relates to a test bench, in particular to a hole bottom vibration simulation test bench. Background technique [0002] In the prior art, vibration is one of the most common problems encountered by drilling tools during drilling. Especially in the deep hole drilling process, the elastic expansion and contraction of the drilling tool makes the axial vibration become the main problem of the drilling tool vibration. The main source of BHA vibration is the interaction between the bottom hole bit and rock, the rotation of the upper rotary table and the vibration of the upper hole induced by the hole wall, and the coupling between the two. The vibration of the drilling tool in the hole will reduce the life of the drill bit or even damage it, and the tripping of the drilling tool will lead to fish falling accidents and reduce the drilling speed. Designing and developing a suitable downhole shock absorber to reduce and rationally utilize the axi...

AI Technical Summary

Problems solved by technology

Although a lot of research has been done on the vibration of bottom drilling tools at home and abroad, there is no public report on the vibration testing platform of bottom drilling tools that considers the characteristics of reasonable vibration spectrum, has the actual damping of the simulated hole wall and multiple vibration sources.

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