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Bionic adaptive PDC drill bit

A self-adaptive, drill bit technology, applied in construction and other directions, can solve problems such as delamination or even spalling, low work efficiency, and drill bit failure, and achieve the effects of improving efficiency and chip removal, improving drilling efficiency, and convenient loading and unloading

Active Publication Date: 2015-11-04
四川宝石机械石油钻头有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned existing PDC drill bit when drilling into the bottom layer, the cutting teeth wear quickly, the damage to the cutting teeth and the PDC sheet is large during drilling, and the polycrystalline diamond layer is prone to fragmentation, delamination or even peeling off. , leading to the failure of the entire drill bit, low work efficiency and other issues, and to provide a bionic adaptive PDC drill bit

Method used

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  • Bionic adaptive PDC drill bit
  • Bionic adaptive PDC drill bit

Examples

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no. 1 example

[0021] see figure 2 , image 3 , Figure 5 with Figure 6 As shown, this embodiment is composed of a drill base 1, several cutting teeth 2 and several drill blades 3, several drill blades 3 are fixedly arranged on the upper end of the drill base 1, and several cutters 2 are arranged through a pin shaft 22 On several drill blade blades 3;

[0022] The polycrystalline diamond composite sheet 25 is fixedly arranged on the upper end of the cutting tooth cylinder 21 to form the cutting tooth 2. The cutting tooth cylinder 21 is hinged on the drill bit blade 3 through the pin shaft 22. The first elastic body 23 and the second elastic body 24 are respectively arranged On both sides of the cutting tooth cylinder 21, and cooperate with the inner wall of the drill bit blade 3;

[0023] The initial back rake angle a of the cutter 2 is 0°-10°, and the side rotation angle β is 0°-15°;

[0024] The cutting teeth 2 are superhard cutting materials, which are polycrystalline diamond compo...

no. 2 example

[0026] see image 3 , Figure 4 , Figure 5 with Figure 6 As shown, this embodiment is composed of a drill base 1, several cutting teeth 2 and several drill blades 3, several drill blades 3 are fixedly arranged on the upper end of the drill base 1, and several cutters 2 are arranged through a pin shaft 22 On several drill blade blades 3;

[0027] The initial back rake angle a of the cutter 2 is 0°-10°, and the side rotation angle β is 0°-15°;

[0028] The cutting teeth 2 are superhard cutting materials, which are polycrystalline diamond composite sheets or polycrystalline diamond sheets or cemented carbide teeth.

[0029] Working principle and process of the present invention:

[0030] see figure 1 , figure 2 , image 3 with Figure 4 As shown in the bone diagram of the bionic prototype tiger claw of the present invention, when the tiger preys on the prey, its front paw toe can instantly penetrate the prey's flesh, but when the toe tip touches the hard bone of the p...

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Abstract

The invention discloses a bionic adaptive PDC drill bit which is composed of a drill bit matrix, a plurality of cutting tooth assemblies and a plurality of drill bit wings. The plurality of drill bit wings are fixedly arranged at the upper end of the drill bit matrix. The plurality of cutting tooth assemblies are fixedly arranged on the plurality of drill bit wings. The bionic adaptive PDC drill bit simulates a prototype tiger paw bone. The bionic adaptive PDC drill bit is designed according to the adaptive characteristic of the pawl. A self protecting structure is realized through a joint movement by means of a biological paw. The cutting angle of the cutting tooth can be adaptively changed under the function of a stratum impact force in drilling into a complex stratum by the drill bit. After the drill bit drills into a hard rock, a caster angle enlarges and a lateral rotation angle reduces for protecting a composite sheet. After the drill bit drills into a soft rock, the caster angle reduces and the lateral rotation angle enlarges. A polycrystalline diamond compact can easier drill into the rock, thereby realizing high-efficiency rock crushing. The bionic adaptive PDC drill bit has advantages of realizing simple structure and convenient detachment, reducing and preventing impact damage of the cutting tooth by stratum change, effectively prolonging service life and drilling efficiency of the drill bit, and improving rock cutting efficiency and chip removal effect.

Description

technical field [0001] The invention relates to a drill bit in the field of drilling, in particular to a bionic adaptive PDC drill bit. Background technique [0002] As the main drill bit for drilling medium-hard formations, PDC bit is widely used. When the drill bit drills into hard formations, highly abrasive formations, soft and hard interlayers, gravel interlayers, broken rock formations and other formations, the mechanical speed drops sharply, the cutting teeth wear faster, and the polycrystalline diamond layer is prone to fragmentation and delamination. Even peeling off, resulting in the failure of the entire drill bit. In addition, the back rake angle of the PDC cutter has a great influence on the drilling efficiency. When cutting soft formations, the smaller the angle is, the better the ROP can be played; Damage from small rock impacts to PDC pieces. In the field of oil drill bits, some scholars have made improvements to the adaptability of PDC drill bits. For exa...

Claims

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Application Information

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IPC IPC(8): E21B10/43
Inventor 高科孙阳孙友宏陈宝义马宇谢晓波
Owner 四川宝石机械石油钻头有限责任公司
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