Half-funnel-type nozzle double-layer water channel diamond-impregnated bit

Abstract

A half-funnel-type nozzle double-layer water channel diamond-impregnated bit comprises a steel body and a working layer with at least two wings, and further comprises stepped water channels and half-funnel-type nozzles. The half-funnel-type nozzles are formed on bottom lip surfaces of the working layer, and the stepped water channels are arranged below the half-funnel-type nozzles and located in the inner surface and the outer surface of the working layer. The diamond-impregnated bit can reach a total drilling depth of 80-100m. Compared with an existing bit with the drilling depth of 40-60m, the diamond-impregnated bit is long in service life, can beneficially reduce drill raising frequency, reduces labor intensity of workers, and improves work efficiency.

Description

technical field [0001] The invention relates to a semi-funnel-shaped double-layer water tank impregnated with diamond drill bit. Background technique [0002] Geological exploration drilling can be divided into single pipe drilling, double pipe drilling and wireline core drilling. Wireline core drilling is a method of core drilling without lifting. Its advantages are simple drill bit structure, high drilling efficiency, high core recovery rate, low labor intensity, and low drilling cost. At present, the existing rope core drill bit is generally a single-stage water tank, and the nozzle adopts a rectangular nozzle or a trapezoidal nozzle. The nozzle is formed by machining, which has low efficiency and high labor intensity; the existing nozzle has a thick bottom lip surface, and the cooling liquid is often not better. Cooling can not achieve better results, and the chip removal effect is not good, which increases the repeated crushing of the drill bit, increases the force of ...

AI Technical Summary

Problems solved by technology

At present, the existing rope core drill bit is generally a single-stage water tank, and the nozzle adopts a rectangular nozzle or a trapezoidal nozzle. The nozzle is formed by machining, which has low efficiency and high labor intensity; the existing nozzle has a thick bottom lip surface, and the cooling liquid is often not better. Cooling can not achieve better results, and the chip removal effect is not good, which increases the repeated crushing of the drill bit, increases the force of the drill bit, etc., and affects the service life of the diamond drill bit; in addition, the height of the working layer is generally 7 -10mm, when the cumulative drilling depth of the drill bit reaches 40-60m, the drill bit will be scrapped and the service life is short

The existing single-stage water tank is not suitable for ultra-high working layers, otherwise the coolant will not be able to reach the bottom lip of the drill bit working layer

Most of the existing drill bits use alloys and polycrystals to protect the non-working layer. In this way, the loss of the inner and outer diameters of the working layer is often accelerated, the wear is serious, and the service life is short.

And when drilling, most of them use deep hole drilling, and it takes a long time to lift the drill once, sometimes even 1-2 shifts (more than 8-10 hours), the work efficiency is low, and the labor intensity is high

Images