A horizontal directional drilling reaming gas reverse circulation simulation experimental device and experimental method

Abstract

The invention discloses a simulation experiment device for reaming gas reverse circulation through horizontally directional drilling, and an experiment method, and relates to the technical field of non-excavation engineering. According to the simulation experiment device for reaming gas reverse circulation through horizontally directional drilling, and the experiment method, an air storage tank isarranged on the right side of an air compressor, the right side of a pressure reducing valve is connected with an air inlet pipeline, and a motor is arranged below a vortex shedding flowmeter. According to the simulation experiment device for reaming gas reverse circulation through horizontally directional drilling, and the experiment method, the rock debris discharging process during gas reversecirculation reaming through horizontally directional drilling is simulated, by using the simulation experiment device for reaming gas reverse circulation through horizontally directional drilling, and the experiment method, the influences of different working flow pressure, annulus mud pressure and drilling rod rotating speeds on the working property and the cavitation property of a reamer can beresearched, and the influences of different mud properties, rock debris particle diameters, rock debris adding speeds and drilling rod rotating speeds on the debris discharging efficiency of the reamer can be further researched.

Description

technical field [0001] The invention relates to the technical field of trenchless engineering, in particular to a horizontal directional drilling and reaming gas reverse circulation simulation experiment device and an experiment method. Background technique [0002] Horizontal directional drilling is the use of drilling equipment anchored on the ground to drill into the formation at a small incident angle relative to the ground to form a pilot hole, and then expand the diameter of the pilot hole to the required size, and pull the pipeline into Drilling is a trenchless pipeline laying technique. [0003] Compared with the traditional mud circulation method, the reverse circulation technology changes the mud circulation channel, and the mud carrying cuttings enters the drill pipe from the annulus and returns to the surface. Since the inner diameter of the drill pipe is much smaller than the diameter of the borehole, the mud carrying cuttings can easily obtain a high flow rate...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a horizontal directional drilling reaming gas reverse circulation simulation experiment device and experimental method, which solves the problem that the existing reverse circulation technology proposed in the above-mentioned background technology is applied in the field of horizontal directional drilling to solve the problem of Practical problems in the cuttings migration process of large-diameter horizontal directional drilling, based on experimental equipment and experimental methods to provide scientific guidance for the determination of gas reverse circulation reaming construction parameters in horizontal directional drilling

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