Comparison of stone elimination capacity and drilling speed of endoscopic clearance lithotripsy devices

The bone tissue destruction during drilling is still one of the crucial problems in implantology. In this study, the influence of drilling speed, coolant presence, and its temperature on bone tissue was tested using swine rib as a biological model of human jaws. The same method of drilling (with or without coolant) was used in all tested samples. The microscopic investigation estimated the size of the destruction zone and morphology of bone tissue surrounding the drilling canal. The achieved results were statistically elaborated. The study proved that the optimal drilling speed was ca. 1200 rpm, but the temperature of the used coolant had no significant influence on provoked bone destruction. Simultaneously, the drilling system without coolant compared to this with coolant has statistical importance on drilling results. Further in vivo studies will verify the obtained results.

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Appraisal of the Drilling Speed Influence on the Evaluated Residual Stress Values

Procedia Engineering ◽

10.1016/j.proeng.2014.12.115 ◽

2014 ◽

Vol 96 ◽

pp. 454-457

Author(s):

Patrik Šarga ◽

František Menda

Keyword(s):

Residual Stress ◽

Drilling Speed

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Study on the Prediction of Drilling Forces on Cortical Bone Based on Finite Element Simulation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.589-590.157 ◽

2013 ◽

Vol 589-590 ◽

pp. 157-162

Author(s):

Ya Hui Hu ◽

Qing Yun Zhang ◽

Xiao Yu Yue

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Feed Rate ◽

Orthogonal Experiment ◽

Element Model ◽

Drilling Speed ◽

Drilling Force ◽

Drill Diameter ◽

Potential Damage ◽

Set Up

The changes of drilling forces during bone drilling provide a useful index for evaluating the risk of potential damage to the bone. The aim of the work is that an elastic-plastic dynamic finite element model is used to simulate the process of a drill bit drilling through the bone. The finite element model was set up in the Abaqus6.11; the prediction model of the drilling force was gotten by using the regression orthogonal experiment and data processing software Matlab7.0. Diverse values of drilling speed, feed rate and drill diameter are important factors which will lead to changes in the drilling forces. By controlling the drilling parameters can obtain the optimal drilling force. The results show that the diameter has the greatest influence on the drilling force, the drilling speed the second, the feed rate the last.

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Horizontal Well Penetration Rate Increasing Technology in Sulige Gas Field

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.733.17 ◽

2015 ◽

Vol 733 ◽

pp. 17-22

Author(s):

Yang Liu ◽

Zhuo Pu He ◽

Qi Ma ◽

Yu Hang Yu

Keyword(s):

Horizontal Well ◽

Economies Of Scale ◽

Reference Value ◽

Drilling Speed ◽

Underground Engineering ◽

Gas Field ◽

Horizontal Section ◽

Well Drilling ◽

Drilling Parameters ◽

Key Techniques

In order to improve the drilling speed, lower the costs of development and solve the challenge of economies of scale development in sulige gas field, the key techniques research on long horizontal section of horizontal well drilling speed are carried out. Through analyzing the well drilling and geological data in study area, and supplemented by the feedback of measured bottom hole parameters provided by underground engineering parameters measuring instrument, the key factors restricting the drilling speed are found out and finally developed a series of optimum fast drilling technologies of horizontal wells, including exploitation geology engineering technique, strengthen the control of wellbore trajectory, optimize the design of the drill bit and BHA and intensify the drilling parameters. These technologies have a high reference value to improve the ROP of horizontal well in sulige gas field.

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Investigation, sensitivity analysis, and multi-objective optimization of effective parameters on temperature and force in robotic drilling cortical bone

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1177/0954411917726098 ◽

2017 ◽

Vol 231 (11) ◽

pp. 1012-1024 ◽

Cited By ~ 15

Author(s):

Vahid Tahmasbi ◽

Majid Ghoreishi ◽

Mojtaba Zolfaghari

Keyword(s):

Sensitivity Analysis ◽

Feed Rate ◽

Process Temperature ◽

Drilling Process ◽

Drilling Speed ◽

Multi Objective Optimization ◽

Bone Drilling ◽

Multi Objective ◽

Tool Diameter ◽

First Time

The bone drilling process is very prominent in orthopedic surgeries and in the repair of bone fractures. It is also very common in dentistry and bone sampling operations. Due to the complexity of bone and the sensitivity of the process, bone drilling is one of the most important and sensitive processes in biomedical engineering. Orthopedic surgeries can be improved using robotic systems and mechatronic tools. The most crucial problem during drilling is an unwanted increase in process temperature (higher than 47 °C), which causes thermal osteonecrosis or cell death and local burning of the bone tissue. Moreover, imposing higher forces to the bone may lead to breaking or cracking and consequently cause serious damage. In this study, a mathematical second-order linear regression model as a function of tool drilling speed, feed rate, tool diameter, and their effective interactions is introduced to predict temperature and force during the bone drilling process. This model can determine the maximum speed of surgery that remains within an acceptable temperature range. Moreover, for the first time, using designed experiments, the bone drilling process was modeled, and the drilling speed, feed rate, and tool diameter were optimized. Then, using response surface methodology and applying a multi-objective optimization, drilling force was minimized to sustain an acceptable temperature range without damaging the bone or the surrounding tissue. In addition, for the first time, Sobol statistical sensitivity analysis is used to ascertain the effect of process input parameters on process temperature and force. The results show that among all effective input parameters, tool rotational speed, feed rate, and tool diameter have the highest influence on process temperature and force, respectively. The behavior of each output parameters with variation in each input parameter is further investigated. Finally, a multi-objective optimization has been performed considering all the aforementioned parameters. This optimization yielded a set of data that can considerably improve orthopedic osteosynthesis outcomes.

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Multifactorial mathematical model of mechanical drilling speed

Mining of Mineral Deposits ◽

10.1201/b16354-65 ◽

2013 ◽

pp. 359-368 ◽

Cited By ~ 4

Author(s):

M. Moisyshyn ◽

B. Borysevych ◽

R. Shcherbiy

Keyword(s):

Mathematical Model ◽

Drilling Speed

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Analysis of methods for assessing the drilling tool performance

E3S Web of Conferences ◽

10.1051/e3sconf/202017703003 ◽

2020 ◽

Vol 177 ◽

pp. 03003

Author(s):

Denis Simisinov ◽

Konstantin Porozhkiy ◽

Olga Pozdnyakova ◽

Ivan Zakharov

Keyword(s):

Correct Choice ◽

Operational Efficiency ◽

Technical Level ◽

Drilling Speed ◽

Drilling Tool ◽

Comparative Tests ◽

Tool Performance ◽

The Cost ◽

One Machine

The analysis of methods for assessing the drilling tool performance using various methods was performed. The applicability of the methods was assessed. Methods based on periodic comparative tests were examined in detail. The technical level and operational efficiency of the drilling tool is determined by the resource (tool driftage), drilling speed, durability, power supplied to the bottom of the well. The correct choice of a drilling tool is ultimately determined by economic assessments. The specific drilling costs are proposed to be determined taking into account the cost of one machine hour, the sharpening of crowns and the average mechanical drilling speed.

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