نتایج جستجو برای: drilling

تعداد نتایج: 12560  

Journal: :Eng. Appl. of AI 2011
Ivan Rizzo Guilherme Aparecido Nilceu Marana João Paulo Papa Giovani Chiachia Luis C. S. Afonso Kazuo Miura Marcus V. D. Ferreira Francisco Torres

Petroleum well drilling monitoring has become an important tool for detecting and preventing problems during the well drilling process. In this paper, we propose to assist the drilling process by analyzing the cutting images at the vibrating shake shaker, in which different concentrations of cuttings can indicate possible problems, such as the collapse of the well borehole walls. In such a way,...

Journal: :Journal of obstetrics and gynaecology of India 2017
Mohamed Lotfy Mohamed El-Sayed Mostafa Abdo Ahmed Marwa Abdel Azim Mansour Shymma Abdel Azim Mansour

OBJECTIVE This study aimed to evaluate the efficacy of unilateral laparoscopic ovarian drilling versus bilateral laparoscopic ovarian drilling with thermal dose adjusted according to ovarian volume in clomiphene citrate (CC)-resistant PCOS patients in terms of endocrine changes, menstrual cycle resumption, ovulation and pregnancy rates. PATIENTS AND METHODS This study was conducted in the Dep...

Journal: :journal of chemical and petroleum engineering 2012
jaber taherishakib mansour fatehirad hossein jalalifar

the main task of drilling the formation by the bit is done via scraping, crushing and grinding. discharging the fluid from the bit nozzles is done with high pressure which assists to break the rocks. different parameters affect the bit selection and design for each drilling formation, but the most important one is drillability that depends on hardness of the formation. in this paper, the design...

2006
J. Kopač S. Sali

Purpose: of this paper is to investigate tool wear monitoring of drilling process by acoustic emission (AE). Design/methodology/approach: of tool wear monitoring in drilling acquires the AE signal and analyses it in the frequency domain. Findings: Tool wear in drilling significantly influences the AE signal independently of the measuring method. This influence is evidently different for various...

2014
A. Munia

This paper focused on evaluation of machining parameters influencing thrust force during drilling of Al–SiC–Gr metal matrix composites using multifaceted carbide drills. There are three machining parameters i.e. Spindle speed, Feed rate, Drill diameter. Experiments are conducted on a vertical machining centre using Taguchi design of experiments. Taguchi orthogonal array is designed with three l...

Journal: :CoRR 2017
Júlio Hoffimann Youli Mao Avinash Wesley Aimee Taylor

Drilling activities in the oil and gas industry have been reported over decades for thousands of wells on a daily basis, yet the analysis of this text at large-scale for information retrieval, sequence mining, and pattern analysis is very challenging. Drilling reports contain interpretations written by drillers from noting measurements in downhole sensors and surface equipment, and can be used ...

2007
C. C. Tsao

Drilling-induced delamination is among the major concerns of applying the fiber-reinforced composite materials in various industries. Core drill ossesses the advantage for reducing the delamination by distributing the drilling thrust force toward the drill periphery. The thrust force of core rill varying with the conditions in drilling carbon fiber reinforced plastic (CFRP) is experimentally in...

2016
Vikas Dhawan

Drilling of fiber reinforced plastics is necessary in order to assemble complex/intricate composite products. Drilling induced damage leads to high percentage of part rejection and reduced product efficiency and life. The thrust force and torque have been found to be the important factors influencing damage. In the present research endeavor, an attempt has been made to develop a fuzzy rule base...

2015
K. S. K. Sasikumar

Agave is the one of the abundantly available plant in India. The wide application of agave reinforced composite plate necessitate the joining of two plates together. For making such joint drilling of those plates is required. Drilling of natural fiber composites is different from the other metals because of its mechanical properties. The major problem faced in drilling of theses natural fiber c...

2015
Pertti Sarala

Methodological development and tests were carried out in the Savukoski-Pelkosenniemi area and eastern Rovaniemi during the project ‘Novel technologies for greenfield exploration’ funded by Tekes. The aims were to develop or provide recommendations for suitable drilling equipments and methods that would enable the sampling of both basal till and bedrock at the same time, as well as stratigraphic...

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