Ultrahigh working layer involute water gap diamond-impregnated drill bit and preparation method thereof

Abstract

The invention discloses an ultrahigh working layer involute water gap diamond-impregnated drill bit and a preparation method thereof. A plurality of first mud blocking structures and a plurality of second mud blocking structures are vertically and alternately distributed in a water gap of a drill bit working part; a through U-shaped groove and a rectangular hole are formed in the positions, located on the inner diameter side of the drill bit and the outer diameter side of the drill bit, of the first mud blocking structure and the second mud blocking structure correspondingly, and a water blocking piece is arranged in the U-shaped groove; an outer water channel and an inner water channel of the working part of the drill bit are communicated with middle flow channel, a drilling fluid can smoothly pass through no matter whether positive circulation or reverse circulation is conducted, and when a first reinforcing layer between inner teeth or a second reinforcing layer between the inner teeth is just completely abraded, only connecting points at the U-shaped opening of the through U-shaped groove in the second mud blocking structure or the first mud blocking structure are worn away, the water blocking piece automatically falls off and is pushed outwards in the radial direction of the drill bit under pump pressure, and a fresh water opening is formed.

Description

technical field [0001] The invention relates to the fields of geological drilling and oil and gas drilling, in particular to a super-high working layer involute nozzle-impregnated diamond drill bit and a preparation method thereof. Background technique [0002] The drill bit is an essential part of the drilling technology, and the efficiency and life of the drill bit directly affect the cycle, cost and effect of the entire drilling. The drill bit is one of the most used items in all the consumption lists of drilling. The service life of the drill bit directly determines the frequency of drilling trips, and its drilling efficiency and life jointly determine the platform-month efficiency and drilling cycle of drilling. For this reason, professional and technical personnel at home and abroad have carried out a lot of research on the diamond material of the drill bit, the formula of the matrix material, the preparation process and the structure of the cutting tooth of the drill ...

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Problems solved by technology

[0007] In the same year, the main inventor also invented the "Integrated Cutting Teeth Impregnated Diamond Bit" whose patent number is 201921748695.6, which discloses a drill bit structure and preparation method with an ultra-high working layer matrix integration. For the strength of the cutting teeth of diamond impregnated drill bits in high working layers, through the integration of matrix, the single teeth of the drill bit are strengthened to connect the cutting teeth of the drill bit with each other, so as to change the "individual combat" of the cutting teeth into "integrated combat" "Greatly improved the strength of the drill bit cutter and the integrity of the drill bit, but the drill bit with this structure requires a higher pump volume. Although it can solve the problem of drill bit cutter strength, the problem of mud "false circulation" still remains not solved

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