Ultra-high working layer involute nozzle impregnated diamond drill bit and preparation method thereof

Abstract

Super-high working layer involute nozzle impregnated diamond drill bit and its preparation method, multiple first mud resistance structures and multiple second mud resistance structures are vertically and alternately distributed in the nozzle working part of the drill bit; the first mud resistance structures and The second mud blocking structure is located on the inner diameter side of the drill bit and the outer diameter side of the drill bit. There are through U-shaped grooves and rectangular holes respectively, and a water-blocking sheet is provided in the U-shaped grooves; the outer water channel and inner water channel of the working part of the drill bit are connected with the middle flow channel. , whether it is positive circulation or reverse circulation, the drilling fluid can pass through smoothly. The only connection point at the U-shaped mouth that runs through the U-shaped groove is worn out, and the water-blocking sheet automatically falls off, and is pushed outwards along the radial direction of the drill bit under the pump pressure to form a new nozzle.

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 ...

AI Technical Summary

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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