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A kind of roller cone-fixed cutting structure composite drill bit

A technology of cutting structure and compound drill bit

Active Publication Date: 2015-11-18
SOUTHWEST PETROLEUM UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the longitudinal vibration of the cone-PDC hybrid drill bit in the prior art has an adverse effect on the rock-cutting process of the fixed cutting teeth of the drill bit, which leads to fast wear of the cutting teeth and seriously affects the rock-breaking efficiency and service life of the drill bit. Problem, the present invention provides a roller cone-fixed cutting structure composite 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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  • A kind of roller cone-fixed cutting structure composite drill bit
  • A kind of roller cone-fixed cutting structure composite drill bit
  • A kind of roller cone-fixed cutting structure composite drill bit

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Embodiment Construction

[0049] 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.

[0050] see Figure 1 to Figure 15 As shown, a kind of roller cone-fixed cutting structure composite drill bit provided by the present invention, the embodiment of the present invention uses figure 1 To illustrate mainly, the roller cone-fixed cutting structure composite drill bit includes a drill body 1, a fixed cutting structure (fixed wing in the figure) 4 and at least one roller cone 2, and the roller cone 2 and the fixed cutting structure 4 Arranged on the bit body 1, the cone 2 forms a rotational connection with the bit body 1 through a bearing structure;

[0051] The tooth wheel 2 is inlaid with a wide insert 3, and the value range of the tip deflection angle α of the wide insert 3 is 70°≤|α|≤90°, and the lower insert part 31 of...

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Abstract

The invention discloses a gear-fixed cutting structure composite drill bit and belongs to the boring field. The drill bit comprises a drill bit body, as well as a gear and a fixed cutting structure which are arranged on the former, wherein the gear is in rotational connection with the drill bit body through a bearing structure; wide inserted teeth are embedded into the gear, the absolute value of the deflection angle Alpha of the top of each inserted tooth is larger than or equal to 70 degrees and smaller than or equal to 90 degrees, each inserted tooth is mushroom-type, and the width of the top of each wide inserted tooth is not less than 80 percent of the horizontal length of each wide inserted tooth; and the fixed cutting structure comprises a plurality of fixed cutting teeth. The composite drill bit can improve the rock breaking efficiency and is prolonged in service life.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to a composite drill bit with a cone-fixed cutting structure. 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 Hu...

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张广存
Owner SOUTHWEST PETROLEUM UNIV
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