Design and test of a self-adaptive bionic polycrystalline diamond compact bit inspired by cat claw

Tang, Qiongqiong; Guo, Wei; Gao, Ke; Gao, Rongfeng; Zhao, Yan; Sun, Yan; Zhou, Yu

doi:10.1177/1687814018810249

Cited by 10 publications

(3 citation statements)

References 20 publications

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“…Experimental investigations revealed that this adjustable structure possessed the capacity for adaptive rake angle adjustment in layered formations of varying hardness. This adaptability enabled the PDC cutter to maintain a smaller rake angle in softer formations and a larger rake angle in harder formations, thereby ensuring an extended lifespan of the cutter during the drilling process [26]. It is evident that by observing the advantageous structures found in nature and incorporating them into the structural design of PDC cutters, the efficiency and lifespan of the drill bit during the rock-breaking process can be effectively improved, thereby reducing drilling costs.…”

Section: Introductionmentioning

confidence: 99%

Structure Design of Bionic PDC Cutter and the Characteristics of Rock Breaking Processes

Wu,

Yuan,

Zhang

et al. 2023

Processes

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The rational structural design of polycrystalline diamond compact (PDC) cutters effectively enhances the performance of drill bits in rock fragmentation and extends their service life. Inspired by bionics, a bionic PDC cutter was designed, taking the mole claw toe, shark tooth, and microscopic biomaterial structures as the bionic prototypes. To verify its rock-breaking effectiveness, the finite element method was employed to compare the rock-breaking processes of the bionic cutter, triangular prism cutter, and axe cutter. The study also investigated the influence of different back rake angles, cutting depths, arc radii, and hydrostatic pressures on rock breaking using the bionic cutter. Prior to this, the accuracy of the finite element model was validated through laboratory tests. Subsequently, a drill bit incorporating all three types of cutters was constructed, and simulations of rock breaking were conducted on a full-sized drill bit. The results demonstrate that the bionic cutter exhibits superior load concentration on the rock compared to the triangular prism cutter and the axe cutter. Additionally, its arc structure facilitates the “shoveling” of the rock, making it more susceptible to breakage under tensile stress. As a result, the efficiency of the bionic cutter surpasses that of the triangular prism and axe cutters. Similarly, it exhibits minimal fluctuations and values in cutting force. As the back rake angle and cutting depth increase, the MSE and cutting force of all three cutters also increase. However, the bionic cutter consistently maintains the lowest MSE and cutting force, confirming the superiority of its bionic structural design. The MSE and cutting force of the bionic cutter fluctuate with the increase of the arc radius, and the optimal arc radius falls within the simulation range, between 21 mm and 23 mm. Compared to the other two types of cutters, bionic cutters possess a unique structure that allows for better release of internal stress within the rock, thereby ensuring higher efficiency in rock-breaking, particularly in deep geological formations. The rock breaking simulation results of full-sized drill bits show that the use of a bionic cutter can improve the drill bit’s ability to penetrate the formation, reduce the possibility of drill bit bounce during the rock breaking process, prevent the occurrence of stick-slip, improve the drilling stability, effectively improve the efficiency and service life of the drill bit during the rock breaking process, and reduce the drilling cost. It is concluded that the research results of bionic PDC cutters are helpful to the development of high-performance drill bits and the reduction of drilling costs.

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Section: Introductionmentioning

confidence: 99%

Structure Design of Bionic PDC Cutter and the Characteristics of Rock Breaking Processes

Wu,

Yuan,

Zhang

et al. 2023

Processes

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“…Du et al designed a biomimetic cutter to reduce the force and energy required to cut the stalks of tea plants inspired by the special geometrical structure of the teeth of crickets [ 12 ]. Tang et al designed a self-adaptive bionic PDC bit inspired by cat claw to solve the problem of short service life and low comprehensive drilling efficiency of PDC bits [ 13 ]. Capra sibirica is the wildlife conservation at the national level.…”

Section: Introductionmentioning

confidence: 99%

Geometric Evolvement, Simulation, and Test of a Bionic Lateral PDC Reamer Bit Inspired by Capra sibirica Horn

Chen

Yan

Zou

et al. 2022

Applied Bionics and Biomechanics

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PDC (polycrystalline diamond compact) bit is the key equipment for drilling holes inside the rock in oil and mining industry. Inspired by the shape and structure of Capra sibirica horn, a bionic lateral PDC reamer bit with variable lateral reaming radius was developed. Side view of Capra sibirica horn was employed for fitting the horn shape curve based on picture processing method. PDC teeth were arranged on the horn shape blade imitating the transverse ridges on the horn to cut the rock material, found with only 30% utilization rate of the total teeth and load concentration of the last tooth. A bionic blade curve evolved from the Capra sibirica horn was defined with geometric method for the lateral reamer bit; the utilization rate of the teeth on the bionic blade curve was improved to 90% with uniformly distributed reaming load. Multigroup simulations were conducted with the finite element method; the effects of bit revolution speed and rotation feed speed of the bionic blade to reaming load were emphatically studied. Concrete sample was reamed indoors from 240 mm to 407 mm in diameter, and the bionic lateral PDC reamer bit was approved by the test result.

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“…The shape and diameter of the holes made in the rock are directly determined by the bit blades and teeth on them, the existing blades on the bit are mostly fixed structure. The hole is thus a single straight cylinder shape with a constant diameter, which is equal to the cutting dimension of the bit teeth (Tang Q.Q. et al, 2018;Wang S.N.…”

Section: Introductionmentioning

confidence: 99%

Research of a Lateral Reamer Bit for Digging Planting Hole in Rocky Abandoned Mine Area

Luo

Chen

2021

INMATEH

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In the abandoned mine area with Karst landform in China, soils are few and thin but rocks are common, traditional planting hole diggers are unequal to work in rocks for vegetation restoration. A reamer bit with variable lateral drilling radius was designed based on the PDC (polycrystalline diamond compact) bit technology and metamorphic mechanism. Two lateral camber blades with PDC teeth were installed inside the bit body, a screw mechanism was employed as the actuation and a spatial double triangle mechanism was taken for the transmission. The curve of the camber blade was specially defined thus the reaming load was decentralized to 85.7% teeth on the blade. The kinematics of the lateral reamer bit was analysed, the mapping models from the actuation to the reaming radius and speed were established. Concrete samples were reamed indoors from 240mm to 407mm in diameter, the reaming cutting load and time length were measured and analysed. The lateral reamer bit was approved with the experiment results, this study provided equipment support for digging the planting hole in rocky abandoned mine areas and also expanded the PDC bit application.

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Design and test of a self-adaptive bionic polycrystalline diamond compact bit inspired by cat claw

Cited by 10 publications

References 20 publications

Structure Design of Bionic PDC Cutter and the Characteristics of Rock Breaking Processes

Structure Design of Bionic PDC Cutter and the Characteristics of Rock Breaking Processes

Geometric Evolvement, Simulation, and Test of a Bionic Lateral PDC Reamer Bit Inspired by Capra sibirica Horn

Research of a Lateral Reamer Bit for Digging Planting Hole in Rocky Abandoned Mine Area

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