Experimental method and experimental device for horizontal directional drilling annular space multi-field coupling simulation drilling

Abstract

The invention provides an annular multi-field coupling simulation drilling experiment method through horizontal directional drilling. The method comprises the steps: building an experiment environment, conducting state initialization, and conducting mutual coupling motion analysis between a drilling rod and slurry, between a drilling rod and rock debris and among slurry, a drilling rod and rock debris by adjusting the slurry input speed, adjusting rock debris injection speed and changing the mass of a weighting counterweight. The invention also provides an annular multi-field coupling simulation drilling experiment apparatus through horizontal directional drilling. The apparatus comprises a slurry circulatory system, a drilling tool revolution system, a rock debris injection system, a slurry flow field monitoring system and an image processing system. The distribution situation of annular slurry flow fields, the spatial movement form of a drilling rod and the motion state of a rock debris bed can be collected and analyzed in real time according to mutual coupling interaction among a drilling rod, rock debris and slurry in an annular space during horizontal directional drilling (HDD).

Description

technical field [0001] The invention relates to a horizontal directional drilling annular space multi-field coupling simulation drilling experiment method and an experiment device, which belong to the field of non-excavation engineering. Background technique [0002] Horizontal Directional Drilling (HDD) is the use of drilling equipment installed on the surface to drill into the stratum at a small incident angle relative to the ground to form a pilot hole, and then expand the pilot hole to the required size and lay the pipeline (line) a technology. At present, horizontal directional drilling technology has been widely used in municipal pipelines and large-diameter long-distance oil and gas pipelines crossing rivers. With the rapid development of my country's economy, the demand for energy continues to increase, and the size of pipes constructed by horizontal directional drilling (HDD) is also increasing. According to the analysis of the failure cases of HDD projects in the...

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Problems solved by technology

[0003] In order to solve the deficiencies of the prior art, the present invention provides a horizontal directional drilling annular space multi-field coupling simulation drilling experiment method and experimental system, aiming at the gap between the drill pipe, cuttings and mud in the annular space during the HDD drilling process. Coupling and interaction problems, real-time acquisition and analysis of the distribution of the annular mud flow field, the spatial movement of the drill pipe, and the movement state of the cuttings bed, through the changes in the annular mud flow field, the movement state of the drill pipe, and the cuttings bed To study the influence of the coupled interaction of drill pipe, cuttings and flow field during HDD drilling

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