High-efficiency rock breaking drilling head for adjusting and controlling lateral cutting ability adaptively

Abstract

The invention discloses a high-efficiency rock breaking drilling head for adjusting and controlling the lateral cutting ability adaptively. The high-efficiency rock breaking drilling head comprises adrilling head connector and a drilling head hat portion which are fixedly connected, wherein the drilling head hat portion is evenly provided with a plurality of drilling head cutter wings in the circumference direction, the drilling head cutter wings extend from the side wall of the drilling head hat portion to the end portion of the drilling head hat portion, the outer end faces of the sides, close to the drilling head connector, of the drilling head cutter wings extend outwards in the radial direction to form gauge protection blocks, the front ends of the drilling head cutter wings in the clockwise directions are provided with a plurality of main cutting teeth in the generatrix direction, the rear ends of the main cutting teeth on the drilling head cutter wings are provided with subsidiary cutting teeth, the front ends of the gauge protection blocks in the clockwise directions are provided with a plurality of the main cutting teeth in the generatrix direction, and the rear ends of the main cutting teeth on the gauge protection blocks are provided with gauge protection subsidiary teeth with the end portions being capable of performing elastic stretching and contracting. Accordingto the high-efficiency rock breaking drilling head for adjusting and controlling the lateral cutting ability adaptively, adaptive adjusting of the main cutting teeth on the gauge protection blocks onthe well wall cutting depth is realized by utilizing the gauge protection subsidiary teeth capable of performing the elastic stretching and contracting, so that the effect of adjusting and controlling the overall lateral cutting ability of the drilling head is achieved.

Description

technical field [0001] The invention belongs to the technical field of drilling engineering, and in particular relates to a high-efficiency rock-breaking drill bit for self-adaptive regulation and control of lateral cutting ability. Background technique [0002] Directional wells are the most important well type for oil and gas development. Directional drilling is a necessary means for the formation of directional wells. The deflection building and deflection stabilization are two basic processes of directional drilling. A set of drilling tools is used to complete the deflection building and deflection stabilization process (one trip Drilling technology) is the technical requirement for directional well technology in the field of modern drilling. Among them, the development of the rotary steerable drilling system provides equipment support for the realization of the "one-pass drilling technology" of directional wells. The use of lateral thrust to realize the lateral cutting ...

AI Technical Summary

Problems solved by technology

However, in directional drilling, it is difficult to simultaneously increase the deflection building ability and drilling speed in the "one-trip drilling technology". If the drilling speed is strong, the penetration rate will be low, and if the drilling speed is fast, the deflection ability will be weak; there is a contradiction between the requirements for the lateral cutting ability of the bit in the deflection section and the deflection stabilization section, that is, the deflection section requires the lateral cutting ability of the deflection side of the bit to be strong, while the deflection stabilization section requires a strong lateral cutting ability of the bit The oblique section requires the drill bit to have the same lateral cutting ability in all directions

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