Special-structured PDC drill bit

A drill bit and special-shaped technology, applied in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of rock breakage in the formation, fatigue of downhole drilling tools, and decrease in ROP, so as to reduce the density of teeth and increase the pressure of a single tooth. , the effect of low layout density
CN108930518AInactive Publication Date: 2018-12-04CHINA UNIV OF PETROLEUM (EAST CHINA)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF PETROLEUM (EAST CHINA)
Publication Date
2018-12-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of geological exploration drill tools, and relates to a special-structured PDC drill bit. Cutting wings and stabilizing wings are alternately uniformly arranged at intervals in the circumferential direction. Portions, exposing a drill bit body of the stabilizing wings are shorter than the cutting wings. PDC cutting teeth and spherical stabilizing teethare arranged at crown portions of the cutting wings. Drill bit protection necks are arranged on the lateral faces of the cutting wings and the stabilizing wings. PDC side direction cutting teeth and spherical abrasion resisting teeth are inlaid at the drill bit protection necks. The drill bit body is provided with fluid channels. Connecting screw thread is arranged at the top of the drill bit. Thecutting wings and the stabilizing wings are provided with the PDC cutting teeth. The PDC side direction cutting teeth are arranged at root portions of the cutting wings and the stabilizing wings meanwhile. The spherical stabilizing teeth are arranged at the drill bit protection necks. The structure is simple, and application is safe and convenient. The number of the cutting wings can be reduced,teeth arrangement density is lowered, pressure intensity of single tooth is improved, the special-structured PDC drill bit can be effectively fed into stratigraphic broken rocks, and can stably work at the shaft bottom. Rock breaking efficiency of the drill bit is high, the service life is long, and shaft body quality is guaranteed.
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Description

Technical field:

[0001] The invention belongs to the technical field of geological exploration drilling tools, and relates to a drill bit for drilling underground minerals such as oil and natural gas, in particular to a special-shaped structure PDC drill bit suitable for drilling oil, natural gas or other minerals. Background technique:

[0002] Formation drilling is essentially a direct dialogue between the drill bit and the formation, and the performance of the drill bit directly affects the drilling speed and economic benefits. At present, the main types of drill bits involved in the drilling process include scraper bits, roller cone bits, PDC bits and diamond bits, among which roller cone bits and PDC bits are more commonly used, especially in the drilling construction of oil and natural gas fields. Compared with wheel bits, PDC bits have the advantages of simple structure and long life, and are suitable for drilling long well sections. Therefore, PDC bits are more commo...

Claims

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