Engineers and environmental consultants use the term borehole to collectively describe all of the various types of holes drilled as part of a geotechnical investigation or environmental site assessment (a so-called Phase II ESA).

The borehole wall is cooled by drilling fluid and maintained at temperature T w = 80°C. The mechanical and thermal properties used in this simulation are listed in Table 9.1.

2024年2月3日 · Borehole wall is the interface between the ground and the heat-carrier fluid. The heat flux on the borehole wall determines the heat exchange rate of DGHEs, an engineering quantity that is of particular interest [36]. Fig. 7 shows how the heat flux on the bore wall varies with time and borehole depth. The heat flux is nearly a linear function ...

2024年7月17日 · These calculations aim to investigate the fracture mechanism and geometry around the borehole wall of the coal rock under varying conditions, including far-field stress, borehole radius, young’s modulus of the coal seam.

study the impact pressure changing law of different bore diameters. By analyzing the movement process of the hole wall under the action of detonation, a simplified calculation model for three stages of dynamic expansion of the incompressible fluid, rock-

2007年9月1日 · In this paper, numerical simulation strategies are proposed and numerical analyses are performed to investigate the stability of a borehole wall during horizontal directional drilling in loose sand with an emphasis on the role of the filter cake in borehole stability.

Bore Hole Diameter Detection. Acoustic BoreHole Measurement Instrument: This device utilizes a sonic transmitter, probes, amplifiers, and recorders to send sound waves through the drilling fluid to the bore hole wall. By measuring the time it takes for the waves to travel to the wall, the instrument calculates the distance from the probe to the ...

BOREHOLE翻译：（为寻找石油、天然气或水而钻的）钻井，钻孔。 了解更多。