Division of the geological section into homogeneous drillability intervals based on the results of modeling the properties of rocks in the drilling process

This study aims to develop an analog compression tester measuring instrument into a digital compression tester as a measurement tool that can provide effectiveness and efficiency to users. This research is a research and development or R&D. This research was conducted in several steps, namely: problem identification, information gathering, product design, product manufacture, expert validation, product revision, testing, final production. The development of analog compression tester was first validated by material experts, media experts, and 15 students, and 5 students for field trials. The subjects of this study were vocational students at Taman Karya Madya Teknik Kebumen. Data collection techniques used in this study using instruments in the form of a questionnaire. The data analysis technique of this research is descriptive qualitative and quantitative descriptive percentage. The results of the development of digital compression tester designs are: 1) the tools and materials used are electric drill, grinding, cutter, goggles, gloves, masks, ruler, acetaminine welding, screwdriver, scissors, digital dial pressure gauge, hose, spark plugs, clamps , and nepel, 2) the manufacturing process that starts from the cutting process, the hole drilling process, the welding process and the process of connecting between components, 3) the workings of digital compression tester design that is reading the pressure or compression of the machine displayed on the monitor digitally using dial pressure digital gauge, 4) the test results obtained from the validation results from: a) material experts at 89% or Eligible; b) media experts at 85% or reasonable; c) response of field trial students in terms of ease of use and reading of 90% or feasible. Thus, the conclusion that the digital compression tester measuring instrument declared feasible to use for measurement.

Get full-text (via PubEx)

Using of thermal model to determine the parameters of printed circuit boards’ drilling process

ELECTRONICS Science Technology Business ◽

10.22184/1992-4178.2017.166.6.190.192 ◽

2017 ◽

pp. 190-192

Author(s):

S. Vantsov ◽

Z. Maung Maung

Keyword(s):

Thermal Model ◽

Printed Circuit Boards ◽

Drilling Process ◽

Circuit Boards ◽

Printed Circuit

Get full-text (via PubEx)

An online hybrid prediction model for mud pit volume in the complex geological drilling process

Control Engineering Practice ◽

10.1016/j.conengprac.2021.104793 ◽

2021 ◽

Vol 111 ◽

pp. 104793

Author(s):

Yang Zhou ◽

Xin Chen ◽

Edwardo F. Fukushima ◽

Min Wu ◽

Weihua Cao ◽

...

Keyword(s):

Prediction Model ◽

Drilling Process ◽

Hybrid Prediction

Get full-text (via PubEx)

Analysis and optimization of laser drilling process during machining of AISI 303 material using grey relational analysis approach

SN Applied Sciences ◽

10.1007/s42452-021-04337-6 ◽

2021 ◽

Vol 3 (3) ◽

Author(s):

V. Chengal Reddy ◽

Thota Keerthi ◽

T. Nishkala ◽

G. Maruthi Prasad Yadav

Keyword(s):

Surface Roughness ◽

Process Parameters ◽

Grey Relational Analysis ◽

Pulse Frequency ◽

Laser Drilling ◽

Simultaneous Optimization ◽

Fibre Laser ◽

Drilling Process ◽

Relational Analysis ◽

Grey Relational

AbstractSurface roughness and heat-affected zone (HAZ) are the important features which influence the performance of the laser-drilled products. Understanding the influence of laser process parameters on these responses and identifying the cutting conditions for simultaneous optimization of these responses are a primary requirement in order to improve the laser drilling performance. Nevertheless, no such contribution has been made in the literature during laser drilling of AISI 303 material. The aim of the present work is to optimize the surface roughness (Ra) and HAZ in fibre laser drilling of AISI 303 material using Taguchi-based grey relational analysis (GRA). From the GRA methodology, the recommended optimum combination of process parameters is flushing pressure at 30 Pa, laser power at 2000 W and pulse frequency at 1500 Hz for simultaneous optimization of Ra and HAZ, respectively. From analysis of variance, the pulse frequency is identified as the most influenced process parameters on laser drilling process performance.

Get full-text (via PubEx)

Kinematics and dynamics analysis of new rotary-percussive PDM drilling tool

Journal of Low Frequency Noise Vibration and Active Control ◽

10.1177/1461348421989156 ◽

2021 ◽

pp. 146134842198915

Author(s):

Jialin Tian ◽

Xuehua Hu ◽

Liming Dai ◽

Lin Yang ◽

Yi Yang ◽

...

Keyword(s):

Drill String ◽

Structure Design ◽

Drilling Process ◽

Analysis Model ◽

Drilling Tool ◽

Stick Slip ◽

Rate Of Penetration ◽

Bottom Hole ◽

Bottom Hole Assembly ◽

The Impact

This paper presents a new drilling tool with multidirectional and controllable vibrations for enhancing the drilling rate of penetration and reducing the wellbore friction in complex well structure. Based on the structure design, the working mechanism is analyzed in downhole conditions. Then, combined with the impact theory and the drilling process, the theoretical models including the various impact forces are established. Also, to study the downhole performance, the bottom hole assembly dynamics characteristics in new condition are discussed. Moreover, to study the influence of key parameters on the impact force, the parabolic effect of the tool and the rebound of the drill string were considered, and the kinematics and mechanical properties of the new tool under working conditions were calculated. For the importance of the roller as a vibration generator, the displacement trajectory of the roller under different rotating speed and weight on bit was compared and analyzed. The reliable and accuracy of the theoretical model were verified by comparing the calculation results and experimental test results. The results show that the new design can produce a continuous and stable periodic impact. By adjusting the design parameter matching to the working condition, the bottom hole assembly with the new tool can improve the rate of penetration and reduce the wellbore friction or drilling stick-slip with benign vibration. The analysis model can also be used for a similar method or design just by changing the relative parameters. The research and results can provide references for enhancing drilling efficiency and safe production.

Get full-text (via PubEx)