Tricone PDC concentric drill bit

A technology of three cones and drill bits, which is applied to drill bits, earth-moving drilling, drilling equipment, etc., can solve the problems of serious drill bit effectiveness, short footage of a single drill bit, and slow ROP, etc., and achieves good self-cleaning effect and expands Use range, reduce the effect of tripping
CN110359847AInactive Publication Date: 2019-10-22河北锐石钻头制造有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
河北锐石钻头制造有限公司
Publication Date
2019-10-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a tricone PDC concentric drill bit. The tricone PDC concentric drill bit consists of a tricone PDC concentric drill bit and a PDC drill bit, wherein a pilot bit at the front endof the lower part of the tricone PDC concentric drill bit is the tricone PDC drill bit, and an reaming bit following an opening of the tricone PDC concentric drill bit is the PDC drill bit, so that atwo-stage drill bit is formed; the rotating axes of the upper and lower two-stage drill bits are overlapped; and the tricone PDC drill bit and the PDC drill bit are connected in a regular buckling manner through conical threads. The tricone PDC concentric drill bit is the combination of the tricone drill bit and the PDC drill bit; the tricone drill bit is the pilot bit with smaller diameter, thePDC drill bit is an expanding bit with larger diameter, and the rotating axes of the tricone drill bit and the PDC drill bit are overlapped, so that the advantages of the tricone drill bit and the PDCdrill bit are combined, and the efficient rock breaking of the two-stage drill bits is realized; the mechanical drilling speed potential is high; the mechanical drilling speed is improved; the drilling footage of the drill bit is increase; the underground accidents such as mud bags are decreased; the stratum applicability is wide; and a new technical scheme for improving the speed and the efficiency of the ground drilling operation with high deep hardness is supplied.
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Description

technical field

[0001] The invention relates to the technical field of a PDC drill bit, in particular to a tricone PDC concentric drill bit. Background technique

[0002] Drilling is an important link in the exploration and development of oil and gas and deep mineral resources. As an important tool for breaking rocks in the drilling process, the ability to select an appropriate drill bit according to the formation characteristics and drilling process conditions is the main factor affecting the drilling speed and cost. Drill bits used in oil and mineral exploration drilling are divided into three categories: roller cone bits, diamond material bits and scraper bits. That is, there are three types of TSP drill bits. At present, drilling operations are developing into deep and complex formations, and the number of deep and ultra-deep wells has increased. The traditional tricone and PDC bits have low rock breaking efficiency, slow ROP, short footage of a single bit, serious dri...

Claims

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