Shale crushing experimental device capable of considering drill string dynamic vibration and experimental method

Abstract

The invention provides a shale crushing experimental device capable of considering drill string dynamic vibration and an experimental method. The device comprises a one-layer plate, a drilling pressure detection device, a two-layer plate, a plane thrust ball bearing, a three-layer plate, a clamping device, a torque detection device, a displacement detection device, a data acquisition system, a drill string and a drill bit. The shale crushing experimental device is characterized in that a cantilever beam pressure sensor is mounted in a center position between the one-layer plate and the two-layer plate, the three-layer plate can freely rotate through the plane thrust ball bearing between the two-layer plate and the three-layer plate, and the torque of the drill string acts on the cantilever beam pressure sensor fixed on the one-layer plate through the rotation of the three-layer plate; a displacement sensor pull rod is connected with a plastic circular ring, a rolling bearing is stuck into the plastic circular ring, and a T-shaped steel tube stuck into the rolling bearing is connected with the drill string to measure the displacement of the drill string. With the adoption of the device and the method, the influence of dynamic vibration, drilling pressure, drilling footage and the torque of the drill string on shale crushing can be determined; an experimental basis is provided for anisotropic shale optimization drilling.

Description

technical field [0001] The invention relates to a rock crushing experimental device in petroleum and geological drilling engineering, in particular to a shale crushing experimental device and an experimental method considering the dynamic vibration of a drill string. Background technique [0002] With the sustained and rapid growth of my country's national economy, the demand for energy has increased sharply, and the contradiction between supply and demand of oil and natural gas resources has intensified. In 2013, my country's foreign dependence on oil reached 58.1%, and natural gas reached 31.6%, which greatly exceeded the internationally recognized warning line and seriously threatened the security of the national energy strategy. New resources must be found. As a clean energy, natural gas accounts for a low proportion in my country's energy consumption (only 4.5% in 2011). In 2012, China's natural gas production was about 100 billion cubic meters, and its imports were ab...

AI Technical Summary

Problems solved by technology

[0005] At present, the existing isotropic sandstone rock breaking devices can only consider the rock breaking volume, and it is difficult to measure the impact of the dynamic vibration of the drill string on the rock breaking volume, WOB, ROP, footage and torque. Anisotropy can easily cause dynamic vibration of the drill string and is one of the main factors that must be considered in shale crushing

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