Magnetic treatment device and method for modification of hot pressing coring type iron-based diamond drill bit

Abstract

The invention discloses a magnetic treatment device for modification of a hot pressing coring type iron-based diamond drill bit. The magnetic treatment device comprises a U-shaped magnet; the U-shapedmagnet is arranged in a sliding platform; the sliding platform is arranged on a bottom plate, and can slide along the bottom plate; the U-shaped magnet consists of an L-shaped iron core and a reversed-T-shaped iron core; the reversed-T-shaped iron core and the L-shaped iron core each comprises a horizontal section and a vertical section; the bottom surface of the horizontal section of the reversed-T-shaped iron core is in close contact with the top surface of the horizontal section of the L-shaped iron core, and can move along the horizontal section of the L-shaped iron core; the lower partsof the vertical sections of the reversed-T-shaped iron core and the L-shaped iron core are in the sliding platform and are in close contact with the sliding platform; the upper part of the vertical section of the reversed-T-shaped iron core is wound by a first coil; the upper part of the vertical section of the L-shaped iron core is wound by a second coil; and the first coil and the second coil are connected with a programmable power supply in series. The abrasive resistance and the bending strength of a drill bit billet can be improved; and the magnetic treatment device is applicable to drillbits in different external diameters, and rapid attenuation of the magnetic induction intensity is avoided.

Description

technical field [0001] The invention relates to the field of drilling engineering, in particular to a magnetic treatment device and method for modifying a hot-pressed coring type iron-based diamond drill bit. technical background [0002] In the geological drilling industry, hot-pressed impregnated diamond bits are welcomed by the majority of drilling construction teams due to their wide application range, low cost, and reliable performance. At present, the hot-pressed diamond bit matrix system is mainly divided into tungsten carbide-based, cobalt-based and iron-based. Tungsten carbide-based matrix has high hardness and strong wear resistance; cobalt-based matrix has better wettability to diamond, less thermal erosion, and cobalt-based matrix has good performance; but the price of the first two is much higher than that of iron-based diamond For drill bits, if iron is directly used instead of tungsten carbide or cobalt, there will be many negative problems, so the modificati...

AI Technical Summary

Problems solved by technology

[0004] At present, the modification of the bit matrix is ​​mainly carried out from the two aspects of sintering process and matrix formula. However, this kind of modification has high economic cost and is easy to cause pollution. These shortcomings can be overcome by using magnetic treatment modification. , and has a positive effect on the wear resistance and bending strength of hot-pressed iron-based diamond drill bits

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