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Composite drill bit

A composite drill bit and bit body technology, used in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems affecting the rock-breaking efficiency and service life of the drill bit, and the cutting tooth wear speed is fast, so as to eliminate adverse effects, move smoothly, The effect of improving the reliability of the mounting

Active Publication Date: 2015-07-08
SOUTHWEST PETROLEUM UNIV +3
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the longitudinal vibration of the cone in the existing technology of the cone-PDC hybrid drill bit has an adverse effect on the rock-cutting process of the fixed cutter of the drill bit, which leads to fast wear of the cutter and seriously affects the rock-breaking efficiency and service life of the drill bit. Problem, the present invention provides a compound drill bit, which can prolong the service life of the drill bit while improving the rock-breaking efficiency of the drill bit

Method used

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Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0045] see Figure 1 to Figure 12 Shown, a kind of composite drill provided by the present invention, the embodiment of the present invention uses figure 1To illustrate, the composite drill bit includes a drill body 1, a fixed cutting structure (fixed wing in the figure) 4 and at least one cone 2, and the cone 2 and the fixed cutting structure 4 are arranged on the drill body 1, the cone 2 forms a rotational connection with the bit body 1 through a bearing structure;

[0046] The tooth wheel 2 is inlaid with a horizontally mounted tooth 3, and the value range of the deflection angle α of the tooth top of the horizontally mounted tooth 3 is 70°≤|α|≤90°, and the width W of the tooth top of the horizontally mounted tooth 3 is not The lo...

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Abstract

The invention discloses a composite drill bit and belongs to the field of boring. The composite drill bit comprises a drill bit body, a gear and a fixed cutting structure, wherein the gear and the fixed cutting structure are arranged on the drill bit body, and the gear is in rotational connection with the drill bit body through a bearing structure; transversely inlaid teeth are fixed on the gear, the addendum deflection angle Alpha of each transversely inlaid tooth is less than or equal to 90 degrees and is greater than or equal to 70 degrees, and the width B of the quartered addendum of each transversely inlaid tooth is not less than 80 percent of the cylindrical diameter D of the inlaid part of the lower part of the transversely inlaid tooth; and the fixed cutting structure comprises a plurality of fixed cutting teeth. According to the utility model, while the rock breaking efficiency of the drill bit is improved, the service life of the drill bit is prolonged.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to a composite drill bit. Background technique [0002] In oil and gas, mining engineering, building foundation engineering construction, geological and hydrological drilling engineering, drill bits are usually used to break rocks, and drill bits are rock-breaking tools for breaking rocks to form wellbores. At present, the drill bits used in drilling engineering mainly include three-cone bits and PDC bits. Among them, the three-cone bits include steel tooth drill bits (also known as milling tooth bits) and carbide tooth drill bits (also known as insert tooth bits). In recent years, Baker Hughes of the United States has launched a new product of the cone-PDC hybrid drill bit. The following is an example of the cone-PDC hybrid drill proposed by Baker Hughes of the United States. [0003] The cone-PDC hybrid drill bit proposed by Baker Hughes of the United States is formed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/16
Inventor 杨迎新陈炼徐彤郑家伟程荣超纪国栋冯明孙永兴付晓平林敏任海涛包泽军董博
Owner SOUTHWEST PETROLEUM UNIV
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