A bidirectional cutting edge polycrystalline diamond composite sheet for high-frequency rotary vibration crushing rock

Abstract

The invention discloses a bidirectional cutting-edge polycrystalline diamond composite sheet for high-frequency rotary vibration rock crushing, which belongs to the technical field of drilling and well drilling, and consists of a first polycrystalline diamond layer, a hard alloy layer and a second polycrystalline diamond layer Composition, the structure of the first polycrystalline diamond layer and the second polycrystalline diamond layer is consistent; the cemented carbide layer is sandwiched between the first polycrystalline diamond layer and the second polycrystalline diamond layer, and the two sides of the cemented carbide layer are respectively The first polycrystalline diamond layer and the second polycrystalline diamond layer are bonded together by high temperature and high pressure sintering and multi-faceted bonding; both the first polycrystalline diamond layer and the second polycrystalline diamond layer are provided with cutting surfaces, edge surfaces and bonding surface; under the high-frequency rotational vibration, the blade faces of the first polycrystalline diamond layer and the second polycrystalline diamond layer can achieve two-way crushing and forming holes for extremely weakly abrasive hard rock formations, which has little vibration for surrounding rocks and avoids the conventional single The one-sided wear of the edge polycrystalline diamond composite sheet improves the life of the polycrystalline diamond composite sheet.

Description

technical field [0001] The invention belongs to the technical field of drilling and well drilling, and relates to a high-frequency rotary vibration rock breaking tool, in particular to a bidirectional cutting edge polycrystalline diamond composite sheet for high frequency rotary vibration rock breaking. Background technique [0002] In drilling, the hard rock formation with extremely weak abrasiveness is characterized by dense and complete rock, high compression resistance hardness, and weak abrasiveness. Generally, the drilling time of diamond drill bits is extremely low, and the lip surface of the drill bit and the rock are polished each other. "Slip" phenomenon. As the drilling depth increases, the depth, frequency and thickness of similar hard and slippery formations increase, and drilling becomes extremely difficult. Drilling to overcome this type of formation is usually accomplished by using a diamond drill bit combined with hydraulic axial impact, torque impact, or h...

AI Technical Summary

Problems solved by technology

Drilling to overcome this type of formation is often accomplished by using a diamond drill bit combined with hydraulic axial impact, torque impact, or hydraulic axial impact combined with torque impact, but the effect is still not ideal

In view of the above difficulties, a high-frequency rotary vibration rock breaking method and equipment are disclosed in the Chinese patent literature. See the application number 201811148280.5 for details, which fundamentally solves the problem of hard rock drilling. Only one-way cutting can be achieved, and the service life of the polycrystalline diamond composite sheet is low

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