Direct push type drilling tool assembly for well construction and water sampling

Abstract

The invention provides a straight-pushing-type well building water-sampling drilling tool assembly comprising an impact handle, an impact inner pipe and an impact outer pipe. The impact inner pipe issleeved with the impact outer pipe, an inner pipe punch is connected to the bottom end of the impact inner pipe in a threaded mode, and a hollow drilling bit seat is connected to the bottom end of theimpact outer pipe in a threaded mode; a hollow outer pipe drilling bit is arranged at the bottom end of the drilling bit seat and communicates with the drilling bit seat; the impact handle is mountedat the top end of the impact outer pipe, and a cavity is formed in the bottom end of the impact handle; and an inner pipe impact cap is arranged in the cavity of the impact handle, and the inner pipeimpact cap is connected to the top end of the impact inner pipe in a threaded mode. Rapid well forming can be achieved, high-quality well forming is achieved, and the representativeness of a water sample of a sampling layer is ensured.

Description

technical field [0001] The invention relates to geological survey equipment, in particular to a direct-push drilling tool assembly for well construction and water sampling. Background technique [0002] Traditional well construction methods include: one is to use a three-winged drill bit or a cylindrical drill bit to connect the bare drill pipe, rely on the rotary drive of the drilling rig, and return water or mud to replace the soil and sand, and the other is to use a drill with a cutting edge. The round drill bit is connected to the drill pipe, and the drilling tool is hoisted by the hoisting function of the drilling rig, and the well is formed gradually by reciprocating impact, extrusion or cutting soil. Both of the above two methods have a certain degree of mud spill pollution and soil spill pollution, which will obviously damage the surface of the monitoring point and easily cause the detection well to collapse, which will lead to secondary pollution of the sampled wate...

AI Technical Summary

Problems solved by technology

Both of the above two methods have a certain degree of mud spill pollution and soil spill pollution, which will obviously damage the surface of the monitoring point and easily cause the detection well to collapse, which will lead to secondary pollution of the sampled water and affect the representativeness of the sampled water, and the efficiency is low , the operation method is extensive, and there is a certain safety risk

Images