A matrix blade hybrid drill bit and preparation method thereof

Abstract

The invention discloses a matrix knife-blade mixed drill bit and a preparation method thereof. The mixed drill bit includes a drill body, on which a knife wing and a cone are arranged, fixed cutting teeth are arranged on the knife wing, and the cone passes through the tooth palm and the cone. The drill bit body is connected, and the blade is formed by sintering the base body with the blade and the matrix powder material together to form the matrix blade. During preparation, the matrix with blades is installed above the sintered bottom mold through a sand board, and the position of the graphite replacement sheet is arranged in the sintered bottom mold; then the matrix powder is filled, and the sintered bottom mold containing the matrix powder material The mold and the matrix with blades are put into a high-temperature sintering furnace and sintered together to form the blade matrix. The matrix blade hybrid drill bit of the present invention improves the wear resistance of the drill bit, and improves the ability of the drill bit to adapt to complex formations; the preparation method of the present invention is realized by combining the sintering process of the matrix blade and the machining method of the steel body drill bit. Simple, it can improve the safety factor of the drill during use.

Description

technical field [0001] The invention belongs to the technical field of drilling, and in particular relates to a matrix blade hybrid drill bit for petroleum, natural gas and geological drilling and a preparation method thereof. Background technique [0002] In the prior art, due to the composite cutting structure of fixed blades and rolling cones, the hybrid drill bit has the advantages of adapting to various formations, high ROP, and more footage. In the drilling formation, the inner cone is not covered by the cone and the shoulder is the most prone to failure position. The PDC cutting teeth of the inner cone have a large radius and are prone to chipping and wear. The PDC cutting teeth of the shoulder are prone to chipping due to the high linear speed of the drill bit. Tooth wear, and the outer row of teeth of the cone is also easy to break. Tooth wear and tear. After the shoulder composite sheet fails, it loses the cutting function. Wheel movement or even falling well acci...

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Problems solved by technology

[0002] In the prior art, due to the composite cutting structure of fixed blades and rolling cones, the hybrid drill bit has the advantages of adapting to various formations, high ROP, and more footage. In the drilling formation, the inner cone is not covered by the cone and the shoulder is the most prone to failure position. The PDC cutting teeth of the inner cone have a large radius and are prone to chipping and wear. The PDC cutting teeth of the shoulder are prone to chipping due to the high linear speed of the drill bit. Tooth wear, and the outer row of teeth of the cone is also easy to break. Tooth wear and tear. After the shoulder composite sheet fails, it loses the cutting function. wheel loosening or even well falling accident

[0003] In the current industry, no suitable solution has been found to solve this kind of dilemma. At present, although it is seen that the inner cone part is densely arranged with teeth and the second row of teeth is added to improve the wear resistance of the drill bit, when the second row of teeth fails, it is still It is easy to wear the substrate, and even the center is worn out and scrapped; installing various wear-resistant teeth on the steel substrate does not have a good effect

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