Automatic detection device for trenchless reaming hole bottom slurry pressure and drill bit torque

Abstract

The invention designs an automatic detection device for trenchless reaming hole bottom slurry pressure and drill torque. The automatic detection device comprises an underground short section and earth surface receiving and processing equipment, wherein the underground short section is a barrel, a cylinder is arranged in the barrel, two ends of the cylinder are attached to the inner wall of the barrel, the middle part of the cylinder is a triangular pyramid, cambered surfaces are milled on two corner angles, strain gauges are attached to the cambered surfaces, a pressure sensor is installed on the conical surface between the two edges pasted with the strain gauges, a circuit board and a power supply are installed at gaps between the conical surface and the barrel, and a through hole is formed in the central axis. The automatic detection device has the advantages that enough strength is guaranteed, and meanwhile the best environment for the strain gauges and the pressure sensor to detect the torque, axial force and slurry pressure of a drill bit is provided; and collected data are uploaded to the ground in a wireless electromagnetic wave mode, it is ensured that the real working condition of an underground drill bit part is accurately obtained in real time, a basis is provided for scientific judgment of the condition in a hole and reasonable regulation and control of construction parameters in horizontal directional drilling (HDD) construction, and safety and high efficiency of a project are guaranteed.

Description

technical field [0001] The invention relates to an automatic detection device for non-excavation reaming mud pressure and drill bit torque. Background technique [0002] One of the main processes of electrical horizontal directional drilling pipe laying is hole reaming, which determines the efficiency and success of the entire project. In the reaming operation, the drill bit torque and the mud pressure at the bottom of the hole are the most critical parameters to be controlled. [0003] Obtaining the torque data of the drill bit can grasp the working status of the reaming in real time, and then scientifically adjust the key operating parameters of the reaming. At the same time, the difference between the torque value of the drill bit at the bottom of the hole and the torque value displayed by the instrument of the drilling rig is the fundamental basis for measuring the friction and adhesion of the drill pipe. If the mud pressure at the bottom of the hole is greater than th...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the real working conditions in the hole cannot be accurately grasped only by surface sensors and instruments in the current non-excavation reaming construction, and develop an automatic detection device for the mud pressure at the bottom of the hole and the torque of the drill bit. The underground short joint detects the drilling parameters and codes and modulates the signal, then collects the data signal and backs it up in the underground memory, and transmits it to the surface receiving equipment in the form of wireless electromagnetic waves for demodulation

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