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Composite drill bit

A composite drill bit and drill bit technology, which is applied in mining engineering, oil and gas drilling engineering, tunnel engineering, and geological drilling fields, can solve the problems of high drilling cost, cutting tooth collapse failure, and cutting tooth impact resistance, etc. Rock efficiency, reduce the probability of tooth chipping failure, and reduce the effect of circumferential vibration

Active Publication Date: 2020-07-14
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the cutting teeth installed on the drill bit are polycrystalline diamond composite sheets, and the impact resistance of these cutting teeth is relatively weak. It is easy to cause the collapse and failure of some cutting teeth
In addition, the existing percussive rock breaking technology is usually a tool string combination of impactor and drill bit, which requires additional percussion equipment separately, and the drilling cost is relatively high

Method used

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  • Composite drill bit
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0041] see Figure 1-Figure 8 , the embodiment of the present invention provides a compound drill bit 1 .

[0042] A composite drill bit 1 includes a drill body 2, a blade 3, a tooth palm 10, and a cone 11. The blade 3 is fixedly connected to the drill body 2 or integrally formed. The blade 3 is provided with cutting teeth 31. The cone 11 and the The tooth palm 10 forms a rotational connection through a shaft, the tooth 111 is arranged on the cone 11 , and the impact unit 6 is arranged on the compound drill bit 1 through the supporting body 5 .

[0043] see Figure 3-Figure 6 , the impact unit 6 is made up of rolling body 61, transmission device 62 and impact device 63; Image 6 ) The distance between the outer contour 610 of the rolling element 61 and the blade gauge line 40 in the radial direction is L, and its range is -d / 4≤L≤d / 4, where d is the diameter of the cutting tooth; the impact device 63 consists of an impact The rod 632 is composed of at least one impact tooth 6...

no. 2 example

[0053] The embodiment of the present invention provides a composite drill bit, the structure of this PDC drill bit 1 is basically the same as that of the PDC drill bit 1 in the first embodiment, the difference is: please refer to Figure 9 , in this embodiment, the transmission device 62 is a gear mechanism, including a transmission shaft 621, a transmission gear 91, a driven gear 92, and a convex body 622 on the driven gear 92, and the transmission shaft 621 is fixedly connected or integrally formed with the rolling body 61 , the transmission gear 91 is fixedly connected with the transmission shaft 621 or integrally formed. During work, the rolling body 61 drives the transmission shaft 621 and the transmission gear 91 at the bottom end of the transmission shaft 621 to rotate, the driven gear 92 meshes with the transmission gear 91 and rotates, the convex body 622 on the driven gear 92 and the impact in the impact device 63 The rod 632 forms a cam pair to realize the impact of...

no. 3 example

[0055] see Figure 10-Figure 12 , a composite drill bit 1, comprising a drill body 2, a blade 3, a tooth palm 10, and a cone 11, the blade 3 is fixedly connected to the drill body 2 or integrally formed, and the blade 3 is provided with a cutting tooth 31, a cone 11 It forms a rotational connection with the tooth palm through a shaft. The tooth 111 is provided on the cone 11. The drill bit 1 has at least one tooth-setting blank area 7 around the center of the drill bit. The impact unit 6 is provided on the blade 3.

[0056] Impact unit 6 is made of rolling element 61, transmission device 62 and impact device 63; Rolling element 61 can rotate around its own axis and is arranged in the rolling groove 30 of blade 3; Impact device 62 is made of impact rod 632 and at least one impact tooth 631 Composition; the rotation of the rolling body 61 can realize the impact of the impact device 63 toward the radial direction of the drill bit 1 through the transmission device 62 .

[0057] I...

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PUM

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Abstract

The invention discloses a composite drill bit. The composite drill bit comprises a drill bit body, a cutter wing, a tooth palm and a tooth wheel, the cutter wing and the drill bit are fixedly connected or integrally formed, cutting teeth are arranged on the cutter wing, the tooth wheel is rotatably connected with the tooth palm through a shaft, teeth are arranged on the tooth wheel, the compositedrill bit is characterized in that an impact unit is arranged on the composite drill bit, and the impact unit is composed of a rolling body, a transmission device and an impact device; the rolling body can rotate along self axis; and the impact device is composed of an impact rod and at least one impact tooth. According to the composite drill bit, the rock breaking efficiency is improved, meanwhile the drilling cost is saved, and the circumferential vibration of the composite drill bit can further be reduced.

Description

technical field [0001] The invention relates to technical fields such as petroleum and natural gas drilling engineering, mining engineering, geological drilling, tunnel engineering, etc., and specifically relates to a composite drill bit. Background technique [0002] The drill bit is a tool that directly contacts the rock during the drilling process and breaks the rock through cutting and impacting. PDC (Polycrystalline Diamond Compact) drill bits, as an important type of existing drill bit technology, are more and more widely used in oil drilling, geology and even construction engineering. The PDC drill bit breaks the rock mainly by cutting through the cutting teeth on the drill bit. In soft to medium hard formations, it can obtain ideal drilling speed and has been widely used in oil and gas drilling. [0003] With the exhaustion of shallow oil and gas resources, the focus of oil and gas exploration and development has gradually shifted to deep, deep-sea, and unconvention...

Claims

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Application Information

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IPC IPC(8): E21B10/36E21B10/08E21B10/46
CPCE21B10/36E21B10/08E21B10/46Y02P70/10
Inventor 张春亮杨迎新包泽军唐嘉诚王不正倪平虎
Owner SOUTHWEST PETROLEUM UNIV
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