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PDC drill bit with self-impact capability

A technology of impact capacity and drill bit, which is applied in the fields of tunnel engineering, geological drilling, oil and gas drilling engineering, and mining engineering. Effect

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

[0005] The purpose of the present invention is to provide a PDC drill bit with self-impact ability. The PDC drill bit is provided with a self-impact unit, which can effectively improve the intrusion ability of the cutting teeth and improve the rock-breaking efficiency. The problem with the impactor

Method used

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  • PDC drill bit with self-impact capability
  • PDC drill bit with self-impact capability
  • PDC drill bit with self-impact capability

Examples

Experimental program
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Effect test

no. 1 example

[0047] see Figure 1-Figure 10 , the embodiment of the present invention provides a PDC drill bit 1 with self-impacting capability.

[0048] see figure 1 , figure 2 , the PDC drill 1 includes a drill body 2, a blade 3, the blade 3 is fixedly connected with the drill body 2 or integrally formed, the blade 3 is provided with cutting teeth 31, the drill body 2 is provided with a support body 4, the support body 4 A self-impact unit 5 is arranged on it.

[0049] see image 3 , the self-impact unit 5 is composed of a rolling body 51, a transmission 56 and an impact device 50; the rolling body 52 can rotate around its own axis; the impact device 50 is composed of an impact body 54 and at least one impact tooth 53; the rotation of the rolling body 51 can pass The transmission 56 implements the striking of the striking tooth 53 in the striking direction. Apparently, the supporting body 4 can be independently arranged on the drill body 2, or can be fixedly connected with the bla...

no. 2 example

[0059] The embodiment of the present invention provides a PDC drill bit with self-impacting ability, 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 11 , in this embodiment, the transmission device 56 is a slider crank mechanism, which includes a transmission shaft 52, an intermediate connecting rod 60, the transmission shaft 52 is fixedly connected to the rolling body 51, and the intermediate connecting rod 60 is connected to the transmission shaft 52 and the impact body 54 respectively. Hinged, the impact body 54 forms a sliding connection with the support body 4, so that the rotation of the rolling body 51 can realize the impact of the impact teeth 53 towards the impact direction through the slider crank mechanism. The output of the slider crank mechanism is stable, and the impact on the transmission shaft 52 will not be reversed due to the contact of the impact too...

no. 3 example

[0061] The embodiment of the present invention provides a PDC drill bit with self-impacting ability, 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 12-Figure 15 , a cutting tooth 31 is provided on the support body 4 .

[0062] The cutting teeth 31 are arranged on the supporting body 4, which makes full use of the precious space on the drill bit, and can also significantly increase the tooth density of the drill bit, prolonging the service time of the drill bit. Especially for formations with strong abrasiveness, the higher the tooth density means the more diamond content on the drill bit, and the stronger the wear resistance. It is easy for researchers in the field to imagine that the cutting teeth 31 are arranged in front of the impact teeth 53 (see Figure 12 ), or rear (see Figure 13 ), or be set at the front and rear of the impact tooth 53 simultaneously. rea...

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Abstract

A PDC drill bit with the self-impact capability comprises a drill bit body and cutter wings, wherein the cutter wings are fixedly connected with the drill bit body or integrally formed, cutting teethare arranged on the cutter wings, a supporting body is arranged on the drill bit body, a self-impact unit is arranged on the supporting body, and the self-impact unit consists of a rolling body, a transmission device and an impact device; the rolling body can rotate around the axis of the rolling body; the impact device consists of an impact body and at least one impact tooth; and the rotation ofthe rolling body can realize the impact of the impact device through the transmission device. According to the PDC drill bit with the self-impact capability, an impactor tool does not need to be arranged when rock breaking is achieved, drilling cost is saved, meanwhile, invasion capacity of the cutting teeth is improved, and rock breaking efficiency is improved.

Description

technical field [0001] The invention relates to technical fields such as oil and gas drilling engineering, mining engineering, geological drilling, tunnel engineering, etc., and specifically relates to a PDC drill bit with self-impacting ability. 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 unco...

Claims

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Application Information

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IPC IPC(8): E21B10/42E21B10/43E21B10/46E21B10/36
CPCE21B10/42E21B10/43E21B10/46E21B10/36Y02P70/10
Inventor 张春亮杨迎新包泽军陈攀张森林钱齐田鹏
Owner SOUTHWEST PETROLEUM UNIV
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