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A self-adaptive, drill bit technology, applied in construction and other directions, can solve the problems of delamination or even peeling, low work efficiency, fast wear of cutting teeth, etc., to achieve the effect of improving efficiency and chip removal effect, improving drilling efficiency and simple structure
Active Publication Date: 2017-12-08
四川宝石机械石油钻头有限责任公司
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[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
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no. 1 example
[0020] See figure 1 , figure 2 , Figure 4 with Figure 5 As shown, this embodiment is composed of a drill base 1, several cutting teeth 2 and several drill blade wings 3. The several drill wings 3 are fixedly arranged on the upper end of the drill base 1, and the several cutting teeth 2 are arranged through a pin 22. On several drill blades 3;
[0021] 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 to the bit blade 3 through a pin 22, and the first elastic body 23 and the second elastic body 24 are respectively arranged On both sides of the cutting tooth cylinder 21 and matched with the inner wall of the bit blade 3;
[0022] The initial caster angle a of the cutting teeth 2 is 0°-30°, and the side turning angle β is 0°-15°;
[0023] The cutting tooth 2 is a superhard cutting material, which is a polycrystalline diamond composite sheet or a po...
no. 2 example
[0025] See figure 2 , image 3 , Figure 4 with Figure 5 As shown, this embodiment is composed of a drill base 1, several cutting teeth 2 and several drill blade wings 3. The several drill wings 3 are fixedly arranged on the upper end of the drill base 1, and the several cutting teeth 2 are arranged through a pin 22. On several drill blades 3;
[0026] The initial caster angle a of the cutting teeth 2 is 0°-30°, and the side turning angle β is 0°-15°;
[0027] The cutting tooth 2 is a superhard cutting material, which is a polycrystalline diamond composite sheet or a polycrystalline diamond sheet or a cemented carbide tooth.
[0028] The working principle and process of the present invention:
[0029] See figure 1 , figure 2 with image 3 As shown, the bionic prototype tiger claw bone of the present invention, when the tiger preys on its prey, its front paws can instantly penetrate the prey’s skin and flesh, but when the toe tip touches the prey’s hard bones and encounters resista...
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Abstract
The invention discloses a bionic self-adaptive PDC drill bit, which is composed of a drill bit base body, several cutting tooth assemblies and several drill bit blade blades. On several bit blades, the bionic prototype tiger claw skeleton diagram of the present invention, the bionic adaptive PDC drill bit structure is designed according to the self-adaptive characteristics of its claws, and the biological claw toes are used to realize the self-protection structure through joint activities, and when drilling into complex formations Under the action of the impact force of the formation, the cutting angle of the cutter can be adaptively changed, the back dip angle becomes larger and the side rotation angle becomes smaller when drilling into hard rock, the composite sheet is protected, and the back dip angle becomes smaller and the side rotation angle becomes larger when drilling into soft rock. , the polycrystalline diamond composite sheet is easier to cut into the rock and complete the high-efficiency rock crushing. The invention has simple structure, convenient loading and unloading, slows down and avoids the impact force damage of the stratum change on the cutting teeth, effectively improves the lifespan and drilling efficiency of the drill bit, and improves the 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] PDC bits are widely used as the main bits for drilling medium-hard formations. When the drill bit penetrates into hard formations, highly abrasive formations, soft and hard interlayers, gravel interlayers, broken rock formations, etc., the mechanical speed drops sharply, the cutting teeth wear faster, and the polycrystalline diamond layer is easily broken and delamination. It even peels off, resulting in the failure of the entire drill. In addition, the back dip angle of the PDC cutter has a greater impact on drilling efficiency. When cutting soft formations, the smaller the angle, the better the ROP; when drilling hard formations, the back dip angle is appropriately increased, which is beneficial to reduce Damage caused by the impact of small rocks on the PDC film. In the field of petroleum drill bits, some schol...
Claims
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Application Information
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