Simulation Experimental Device for Hydraulic Oscillation Drag Reduction Drilling Tools

Abstract

The invention discloses a hydraulic oscillation drag reduction drilling tool simulation experimental device. The hydraulic oscillation drag reduction drilling tool simulation experimental device comprises a hydraulic oscillator; the hydraulic oscillator comprises an outer cylinder, a rotating shaft, a support seat and a vibration shaft; the vibration shaft is sleeved with a support bearing; the vibration shaft is arranged in the cavity of the outer cylinder through the support bearing; the support seat is fixedly connected with one end of the outer cylinder; the vibration shaft is arranged at the other end of the outer cylinder; one end of the vibration shaft extends into the outer cylinder, and the other end of the vibration shaft is located outside the outer cylinder; the outer edge of the one end of the vibration shaft which extends into the outer barrel extends outwards along a radial direction to form a support surface; the end surface of one end of the outer cylinder is connected with a flange, wherein the one end of the outer cylinder is provided with the vibration shaft; a spring is arranged between the flange and the support surface in a filling manner; a portion of the vibration shaft, which is located outside the outer cylinder, is sleeved with a pre-compression nut; one end of the rotating shaft, which faces the support seat, is fixedly connected with a main valve having an eccentric hole, and correspondingly, the support seat is provided with an auxiliary valve having the same eccentric hole as the main valve; and the main valve and the auxiliary valve have end surfaces which are attached to each other. With the hydraulic oscillation drag reduction drilling tool simulation experimental device adopted, a simulation test of an oscillation drag reduction drilling tool can be carried out.

Description

technical field [0001] The invention relates to a simulation experiment device, in particular to a simulation experiment device of a hydraulic oscillation drag reduction drilling tool with small flow rate and small inner diameter. Background technique [0002] In the prior art, in the wellbore with large curvature or long horizontal well section, the inability to effectively transmit the weight on bit is an important factor affecting the rate of penetration. In this well section, the borehole wall is subjected to greater pressure from the drill string, and the friction between the drill string and the borehole wall increases accordingly. Therefore, during the drilling process, the underpinning phenomenon of the drill string is serious, resulting in the inability to apply the ideal WOB, which seriously affects the drilling speed. When the friction between the drill string and the borehole wall is large enough, it is easy to cause the drill string to twist and deform and indu...

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Problems solved by technology

[0003] Although the research on hydraulic oscillators has gradually matured, most of the experimental research uses finished products for on-site research, and the research content is limited to the overall drilling efficiency. Although this research method is feasible, it takes a long time, especially If there is a problem with the tool during the research process, it will seriously affect the drilling efficiency of the well section

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