Electronic manufacturing sector uses Computer Numerical Control (CNC) machines for drilling holes on Printed Circuit Board (PCB). Some machines do not choose the optimal route when completing their tasks. Hence, this paper proposes an approach, which is based on my Algorithm Shortest Path Search Algorithm (SPSA), for finding the optimal route in PCB holes drilling process. In SPSA, when the rob...

The bottom hole assembly during the drilling process is prone to fatigue and damage under influence of alternating stress, particularly drill bit part assembly. vibration shock data are normally used estimate working status collars for post-processing a particular logging method. recent developments in technology have increased investigations into continuous information measurement. However, ex...

In this paper, we consider the axial motion of a directional multi-sectional drill-string. The drill-string dynamics are represented by distributed dynamical model (wave equations) coupled with an ordinary differential equation at downhole boundary (bit-rock interaction). interaction between drill-bit and rock can introduce severe vibrations in result safety performance issues. Consequently, dr...

In the downhole operation of horizontal Wells, pipe string is subjected to combined action many kinds loads. The may bend sinusoidal or spiral under axial compressive stress, which will also increase friction between and wellbore wall. Because existence friction, milling, salvage, unstuck, sand other construction bring adverse effects. This paper describes characteristics well in fishing, washi...

In directional drilling, the most important thing that leads to pulling out the drill string is end of mud motor working life. Considering the working conditions of down hole mud motors; increasing the mechanical properties of their stator’s elastomer is crucial. Some attempts were done to increase the motor performance through geometrical changes but lack of material improvement is significant...

Mountain geophysical prospecting operations play an important role in the entire petroleum exploration field. Geophysical drill-bit is main tool for mountain operations. Its hydraulic structure directly affects downhole flow field and then chip removal efficiency drilling of bit. At present, most scholars’ research focused on Poly Diamond Crystalline bit, roller etc., less, them study based cha...

In the process of oil drilling, it is often required to improve drilling efficiency and be able analyze faults in process, so great significance study parameter acquisition system drill bit working process[1]. Aiming at this situation, paper designs a device for downhole data acquisition, vibration detection, temperature detection rotational speed deep well bits. paper, an overall scheme design...

Week 6 of Expedition 356 (Indonesian Throughflow) consisted of completing operations at Site U1462 (including another successful downhole logging deployment in Hole U1462C) and the start of operations at Site U1463 (proposed site NWS-2A). The science party was able to finalize all outstanding reports from Site U1461, particularly downhole logging and stratigraphic correlation, and begin finaliz...

An automatic circuit uses several electronic components that are contained on a printed board (PCB), which is micro (tiny) sized board. As there more and holes in the PCB, it becomes increasingly time-consuming to drill them manually with human force. Additionally, accuracy needed when bit makes contact PCB board, might produce drilling errors due friction. The goal of this project create an au...

This study focuses on analyzing the turbulent flow of drilling fluid in inclined wells using Computational Fluid Dynamics (CFD) technique. The analysis is performed considering an annulus with a fixed eccentricity 90% and varying properties, diameter ratio, bed thickness to examine velocity profile, pressure loss, overall wall average shear stresses. CFD simulation results are compared existing...