Log in

Relevant bibliographies by topics / Drilling / Journal articles

Journal articles on the topic 'Drilling'

To see the other types of publications on this topic, follow the link: Drilling.

Author: Grafiati

Published: 4 June 2021

Last updated: 1 June 2024

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Drilling.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Yue, Qian Sheng, Qing Zhi Yang, Shu Jie Liu, Bao Sheng He, and You Lin Hu. "Rheological Properties of Water Based Drilling Fluid in Deep Water Drilling Conditions." Applied Mechanics and Materials 318 (May 2013): 507–12. http://dx.doi.org/10.4028/www.scientific.net/amm.318.507.

Full text

Abstract:

The rheological property of the drilling fluid was one of the focus problems in deep-water drilling, which was widely concerned. In the article, the viscosity-temperature properties of commonly used water soluble polymeric solution, polymeric brine solution, bentonite slurry, polyacrylamide-potassium chloride drilling fluid with different densities and water-base drilling fluid systems commonly used for China offshore well drillings were studied. 4°C-to-20°C viscosity ratio and 4°C-to-20°C YP ratio were used to judge the thickening level of drilling fluids due to low temperature. The experimental results show that on the condition of without considering the influence of pressure on the rheological property of water-base drilling fluid, its viscosity and yield point raised obviously with the decrease of temperature, but the increase level is proximately the same, its 4°C-to-20°C apparent viscosity ratio is basically within the 1.50. Analysis indicates that the viscosity of water-base drilling fluid depends on the viscosity of dispersed media. The performance of water medium determines the viscosity-temperature property of the water-based drilling fluid. It is proposed that in deep water drillings, if a water-base drilling fluid is used, it is not necessary to emphasize the influence of deep water and low temperature on the flowability. On the condition of guaranteeing wellbore stability and borehole cleaning, it is more suitable for using the water-base drilling fluid with low viscosity and low gel strength for deep water well drillings.

APA, Harvard, Vancouver, ISO, and other styles

2

Wen, Yan Liang, Guo Jian Zhang, and Zhi Qiang Zhang. "Numerical Experiments of Drilling Pressure Relief Preventing Roadway Rock Burst." Applied Mechanics and Materials 353-356 (August 2013): 1583–87. http://dx.doi.org/10.4028/www.scientific.net/amm.353-356.1583.

Full text

Abstract:

Based on rock burst mechanism and the present research situation of control technique, pressure relief process of drilling to rock burst roadway is modeled by numerical simulation software, the contrast and analysis of stress field of surrounding rock are put up with and without pressure relief. The results of the calculation indicate that after drilling high stress area on the both sides of the roadway reduces obviously, but stress peak increases and its position is not converted into the deep areas evidently. It is the energy of the high stress area that makes the rock mass between the drillings failure, which achieves the purpose of pressure relief. Drilling diameter and space between drillings are main factors influencing pressure relief effect. The major the drilling diameter and the smaller the space between boreholes, the more complete the rock mass between the drillings failure and the better the pressure relief effect.

APA, Harvard, Vancouver, ISO, and other styles

3

Akbar, Muhammad Sjahid, and Kestrilia Rega P. "Perbandingan Model Data Hilang dengan Model Least Median Square (LMS) pada Optimasi Respon Ganda menggunakan Metode Generalized Reduced Gradient (GRG) (Kasus Penggurdian Komposit Karbon)." Sains & Teknologi 2, no. 1 (October 17, 2019): 63. http://dx.doi.org/10.24123/jst.v2i1.2246.

Full text

Abstract:

Epoxy drillings have consequences the chisel will worn down and drilling result vary greatly. This research purpose is to minimize the chisel wearing out and drilling result deviation with generalized reduce gradient method (GRG). advantage of the method can to look for weighted from both response. This method Applied to outlier data for the chisel wearing out. Research result are more take note of the chisel wearing out than drilling result deviation and optimum condition to machine speed is 715,5 rpm, scrape speed is 90 mm/min, chisel angel is 73,8o with the chisel wearing out is 0,3253 mm and drilling result deviation 5,3720 micron.

APA, Harvard, Vancouver, ISO, and other styles

4

RAHIM, E. A., S. SHARIF, Z. A. AHMAD, A. S. MOHRUNI, and I. A. SYED. "Machinability Investigation when Drilling Titanium Alloys(Drilling technology)." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2005.2 (2005): 553–57. http://dx.doi.org/10.1299/jsmelem.2005.2.553.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Szalma, József, Ole Klein, Bálint Viktor Lovász, Edina Lempel, Sára Jeges, and Lajos Olasz. "Recommended Drilling Parameters of Tungsten Carbide Round Drills for the Most Optimal Bone Removals in Oral Surgery." BioMed Research International 2018 (November 19, 2018): 1–10. http://dx.doi.org/10.1155/2018/3108581.

Full text

Abstract:

Background. High temperatures during drilling can cause thermal osteonecrosis and abnormal wound healing. According to our best knowledge, a widely accepted recommendation for optimal drilling parameters in routine oral surgery bone removals does not exist. Purpose. Our aim was to investigate the correlations of different drilling parameters, including axial load and revolution speed on drilling temperatures and preparation times. Materials and Methods. Standard, 5 mm deep cavities were drilled in 20 PCF (lb/ft3) dens polyurethane blocks with 3 mm (50PCF) cortical layer using new and worn, 3.1mm in diameter tungsten carbide round drills. Worn drills were used in 50 impacted third molar operations before. Axial loads of 3N, 10N, and 25N and speeds of 4.000-8.000-16.000-40.000 revolutions per minute (rpm) were tested. Temperature differences of drilling parameters were calculated by 1-way ANOVA, followed by Tukey’s HSD post hoc tests. Time differences and differences among “optimal” and “suboptimal” groups (with the cut-off value of 3°C and 3s) were estimated by Kruskal-Wallis test with pairwise comparisons. P<0.05 was considered significant. Results. The highest mean temperatures with new and worn drills were 4.64±0.53°C and 6.89±1.16°C, while drilling times varied between 0.16±0.02s and 22.77±5.45s. A 3°C and 3s cut-off value classified drillings significantly to (1) optimal [3N and 8000-16000-40000 rpm or 10N and 4000-8000-16000-40000 rpm] or suboptimal due to (2) high temperatures or (3) long preparation times. Using worn drills, the following parameters should be avoided: 3N with 4.000-8.000 rpm, 10N with 40000 rpm, and 25N at any revolutions. Discussion. The study extensively mapped the drilling temperatures and preparation times of tungsten carbide round drills. Temperatures did not exceed 10°C during drillings with maximal amount of cooling, as well as the drilling parameters, which kept temperatures and preparation times in the most optimal range which were clearly established.

APA, Harvard, Vancouver, ISO, and other styles

6

Schwander, J., S. Marending, T. F. Stocker, and H. Fischer. "RADIX: a minimal-resources rapid-access drilling system." Annals of Glaciology 55, no. 68 (2014): 34–38. http://dx.doi.org/10.3189/2014aog68a015.

Full text

Abstract:

AbstractDetermining the expected age at a potential ice-core drilling site on a polar ice sheet generally depends on a combination of information from remote-sensing methods, estimates of current accumulation and modelling. This poses irreducible uncertainties in retrieving an undisturbed ice core of the desired age. Although recently perfected radar techniques will improve the picture of the ice sheet below future drilling sites, rapid prospective drillings could further increase the success of deep drilling projects. Here we design and explore a drilling system for a minimum-size rapid-access hole. The advantages of a small hole are the low demand for drilling fluid, low overall weight of the equipment, fast installing and de-installing and low costs. We show that, in theory, drilling of a 20 mm hole to a depth of 3000 m is possible in ∼4 days. First concepts have been realized and verified in the field. Both the drill cuttings and the hole itself can be used to characterize the properties of the ice sheet and its potential to provide a trustworthy palaeo-record. A candidate drilling site could be explored in ∼2 weeks, which would enable the characterization of several sites in one summer season.

APA, Harvard, Vancouver, ISO, and other styles

7

Augustin, L., H. Motoyama, F. Wilhelms, S. Johnsen, S. B. Hansen, P. Talalay, and N. Vasiliev. "Drilling comparison in ‘warm ice’ and drill design comparison." Annals of Glaciology 47 (2007): 73–78. http://dx.doi.org/10.3189/172756407786857820.

Full text

Abstract:

AbstractFor the deep ice-core drilling community, the 2005/06 Antarctic season was an exciting and fruitful one. In three different Antarctic locations, Dome Fuji, EPICA DML and Vostok, deep drillings approached bedrock (the ice–water interface in the case of Vostok), emulating what had previously been achieved at NorthGRIP, Greenland, (summer 2003 and 2004) and at EPICA Dome C2, Antarctica (season 2004/05). For the first time in ice-core drilling history, three different types of drill (KEMS, JARE and EPICA) simultaneously reached the depth of ‘warm ice’ under high pressure. After excellent progress at each site, the drilling rate dropped and the drilling teams had to deal with refrozen ice on cutters and drill heads. Drills have different limits and perform differently. In this comparative study, we examine depth, pressure, temperature, pump flow and cutting speed. Finally, we compare a few parameters of ten different deep drills.

APA, Harvard, Vancouver, ISO, and other styles

8

Vieira, Yesus Emmanuel Medeiros, Renata Albergaria de Mello Bandeira, and Orivalde Soares da Silva Junior. "Application of a Logit Model for Water well site location in fractured-bedrock aquifers in northeastern Brazil." International Journal for Innovation Education and Research 10, no. 8 (July 19, 2022): 33–52. http://dx.doi.org/10.31686/ijier.vol10.iss8.3854.

Full text

Abstract:

Wells drilling process in fractured-bedrock aquifers is a difficult task. Extreme variations in lithology and structure features, as well productive water zones sited at preferential points make geological and geophysical investigations difficult. To contribute to the understanding of the process of groundwater zones occurrence in fractured-bedrock aquifers, this paper develops a drilling prospective model by using regression analysis, whose parameters were calibrated according to the photogeological and cartographic analysis of 113 drilling points in the states of Rio Grande do Norte, Paraíba, and Ceará. The effectiveness of the resulting model was assessed through a sample of 43 additional drillings, which were carried out aiming at the distribution of water to the communities in the semiarid region of Brazil. The obtained results indicate the model as an important tool in the drilling process, with direct implications on the logistics costs of water well site location and consequent attendance to the population that needs the water.

APA, Harvard, Vancouver, ISO, and other styles

9

Liu, Gang, Dou Mei, and Jialin Zhang. "A Method Based on SVM Algorithm for Wellbore Collision Monitoring: Using Vibration Signal Characteristics of Bit Drilling in Different Mediums." International Journal of Signal Processing Systems 8, no. 2 (June 2020): 42–48. http://dx.doi.org/10.18178/ijsps.8.2.42-48.

Full text

Abstract:

During well drilling operations of offshore oil and gas exploration, the progress that bit drills through rocks, steel casing and other mediums produces vibration signal with different characteristics. In this work, we presented a wellbore collision monitoring method that using vibration signal produced by bit penetrating in different drilling mediums to identify those unwanted cases that bit is colliding into adjacent wellbores in drilling operation. Firstly, experiments have been carried out to acquire vibration signal of bit drilling in sorts of rock, cement and steel casing mediums. Then, to dig out signal feature in different time scales, empirical mode decomposition (EMD) method was used to decompose every signal sample into several intrinsic mode functions (IMFs) and we extracted and analyzed characteristics in time and frequency domain of all signal IMFs. Finally, support vector machine classifiers were trained with feature vectors of a part of signal IMFs to realize the function of drilling mediums identification and classification. SVM Performance test results indicates that correct identification rate of those classifiers can basically reach 90%. The method presented in this paper proved to be feasible to provide a new approach to monitor wellbore collision risks for offshore drillings.

APA, Harvard, Vancouver, ISO, and other styles

10

Zhang, Guang Wei, Li You, and Zhao Li. "The Finite Element Analysis of a Shaft." Advanced Materials Research 712-715 (June 2013): 1022–26. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1022.

Full text

Abstract:

Finite element method is a kind of method with the aid of computer engineering analysis of discretization numerical calculation. In the rotary steering drilling during the process of practical work, there was a great drilling pressure torque, space size limit strictly and requires a high efficiency and reliability .The working conditions are complex when drillings work underground and the working environment is harsh, there may has many unpredictable situations, the drilling tool may encounter the loose soil, or may be a hard rock, and these changes force is transmitted through the variation cardan shaft, so it is very necessary to check the strength of the variation cardan shaft. This article analyze the variation cardan shaft by ANSYS and provide a reference for actual use.

APA, Harvard, Vancouver, ISO, and other styles

11

Gao, Wen Long. "Casing Drilling Technology to Drilling Site." Applied Mechanics and Materials 214 (November 2012): 63–66. http://dx.doi.org/10.4028/www.scientific.net/amm.214.63.

Full text

Abstract:

Oil development is an important industry of modern construction, for the entire socio-economic development of great significance. The continuous development of all regions of the oil used for exploration and drilling technology have given the stringent requirements, construction problems if the operation would cause serious consequences. Casing Drilling technology is the focus of the entire construction; this paper analyzes the use of technology in the drilling site, and put forward some reasonable proposals to raise the level of promotion of the construction site.

APA, Harvard, Vancouver, ISO, and other styles

12

Hoshino, Masashi. "Drilling fluid for deep water drilling." Journal of the Japanese Association for Petroleum Technology 68, no. 5 (2003): 397–403. http://dx.doi.org/10.3720/japt.68.397.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Kędzierski, Miłosz, Sławomir Wysocki, Rafał Wiśniowski, Małgorzata Uliasz, and Grzegorz Zima. "Drilling mud for shale gas drilling." AGH Drilling, Oil, Gas 32, no. 3 (2015): 503. http://dx.doi.org/10.7494/drill.2015.32.3.503.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

PODO MAHAMAT MATAR, AMINE KARIFENE, and MACKAYE HASSAN TAISSO. "Lineaments as a tool for decision-making in the optimal location of boreholes in the base zone: Case of the department of Abtouyour (republic of Chad)." GSC Advanced Research and Reviews 15, no. 3 (June 30, 2023): 157–70. http://dx.doi.org/10.30574/gscarr.2023.15.3.0191.

Full text

Abstract:

This study has made it possible to highlight that the extraction of structural lineaments helps in the optimal decision-making in the implantation of boreholes in the basement zone. For this purpose, we used remote sensing, as a complementary tool in the extraction of structural lineaments and validated our results with the drillings carried out using electrical tomography carried out in the area. This semi-automatic method allowed us to understand the importance that remote sensing can play in the establishment of successful drilling in the basement zone. For this study we used software such as Excel for drilling data ARMAP 10.8 for GIS, PCI Geomatica software for the extraction of lineaments. The orientation of the lineaments was obtained using the rose diagram of the ROCKWORKS software. In addition, for our study we used images from Landsat 9+, ASTER, DEM, and STRM of 30m resolution which allowed us to develop thematic maps. Thus we were able to validate our Works with the representation by the profiles of electrical resistivity especially the electrical tomography made in the study area and the drillings carried out according to the lineaments extracted. The combination of different parameters in the middle of the basement in a GIS facilitated the spatial analysis, the results was good for the decision making to drill water well in basement area. This approach allowed us to understand that more than 53% of positive drilling intercepts lineaments while only 13% of negative drilling intercepts lineaments.

APA, Harvard, Vancouver, ISO, and other styles

15

Wilhelms, Frank, Heinrich Miller, Michael D. Gerasimoff, Cord Drücker, Andreas Frenzel, Diedrich Fritzsche, Hannes Grobe, et al. "The EPICA Dronning Maud Land deep drilling operation." Annals of Glaciology 55, no. 68 (2014): 355–66. http://dx.doi.org/10.3189/2014aog68a189.

Full text

Abstract:

AbstractWe report on the EPICA Dronning Maud Land (East Antarctica) deep drilling operation. Starting with the scientific questions that led to the outline of the EPICA project, we introduce the setting of sister drillings at NorthGRIP and EPICA Dome C within the European ice-coring community. The progress of the drilling operation is described within the context of three parallel, deep-drilling operations, the problems that occurred and the solutions we developed. Modified procedures are described, such as the monitoring of penetration rate via cable weight rather than motor torque, and modifications to the system (e.g. closing the openings at the lower end of the outer barrel to reduce the risk of immersing the drill in highly concentrated chip suspension). Parameters of the drilling (e.g. core-break force, cutter pitch, chips balance, liquid level, core production rate and piece number) are discussed. We also review the operational mode, particularly in the context of achieved core length and piece length, which have to be optimized for drilling efficiency and core quality respectively. We conclude with recommendations addressing the design of the chip-collection openings and strictly limiting the cable-load drop with respect to the load at the start of the run.

APA, Harvard, Vancouver, ISO, and other styles

16

Mensa-Wilmot, Graham. "Technology Focus: Bits and Bottomhole Assemblies (December 2020)." Journal of Petroleum Technology 72, no. 12 (December 1, 2020): 52. http://dx.doi.org/10.2118/1220-0052-jpt.

Full text

Abstract:

Achieving and sustaining performance drilling’s intended benefits - improved drilling efficiency with minimal down-hole tool failures and the associated reductions in project cycle time and operational costs - requires new protocols in drilling-system analysis. Drilling-system components [bits, reamers, bottomhole assemblies (BHAs), drive systems, drilling parameters, and hydraulics] must be analyzed independently for their relevance on the basis of application types and project challenges. Additionally, the drilling system must undergo holistic evaluations to establish functional compatibility and drilling-parameter responses and effects, considering project objectives and key performance indicators. This comprehensive physics-based approach ensures durability and rate-of-penetration (ROP) improvements without compromising stability and downhole tool reliability. The success of this process is strongly dependent on vibration control. Considering the different vibration modes - axial, torsional, lateral, stick/slip, and whirl - and their many dissimilar initiating and amplification factors, their sources always must be identified. Researchers have challenged the usual classification of erratic torque and revolution-rate behavior as stick/slip. BHA design and drilling-parameter ranges, considering blade spacing, can produce unfavorable tubular deformations, contact points, and side loads. This condition creates torque and revolution-rate fluctuations that have been linked to lateral vibrations. Awareness of these vibration modes, particularly their sources and intensifying conditions, ensures development of effective remediation solutions. Improved borehole quality, with regard to tortuosity and rugosity, must always be considered as a critical requirement in performance drilling. This condition reduces borehole drag, enhances drilling-parameter transfer, and improves ROP and overall run lengths. Most importantly, it reduces vibrations, leading to improvements in downhole tool life and directional drilling performance. In addition to formation drillability effects, drilling-systems components and operational practices have strong effects on borehole quality. Consequently, this must be part of the drilling-system analysis. The industry’s advancements at developing physics-based solutions for drilling challenges have matured. Continuing to ask questions that help us understand how and why we fail or succeed puts more wind beneath our wings to accelerate learning and reduce cycle times. Recommended additional reading at OnePetro: www.onepetro.org. SPE 200740 Digital Twins for Well Planning and Bit-Dull-Grade Prediction by Mehrdad Gharib Shirangi, Baker Hughes, et al. SPE 201616 Validating Bottomhole-Assembly Analysis Models With Real-Time Measurements for Improved Drilling Performance by Mark Smith, Premier Directional Drilling, et al. IADC/SPE 199658 Simulation and Measurement of High-Frequency Torsional Oscillation (HFTO)/High-Frequency Axial Oscillation and Downhole HFTO Mitigation: Knowledge Gains Continue by Using Embedded High-Frequency Drilling Dynamics Sensors by Junichi Sugiura, Sanvean Technologies, et al.

APA, Harvard, Vancouver, ISO, and other styles

17

Król, Kazimierz, Krzysztof Olejarczyk, Marcin Wikło, Zbigniew Siemiątkowski, and Krzysztof Kołodziejczyk. "Individuality dynamic system drilling head – pipe drilling – shaft during drilling deep hole." Mechanik, no. 3 (March 2015): 190/1–190/6. http://dx.doi.org/10.17814/mechanik.2015.3.110.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Panichaporn, Weerapong, Ruktai Prurapark, and Kitipat Siemanond. "Simulation of Drilling Pressure Profile in Directional Drilling and User Program Development." International Journal of Materials, Mechanics and Manufacturing 3, no. 4 (2015): 255–60. http://dx.doi.org/10.7763/ijmmm.2015.v3.206.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Li, Zhong, Lai Bin Zhang, Fan Luo, Bai Ling Zhang, and Shu Ying Tan. "Mechanical Property Analysis of Materials and Application of Buttress Thread Buckle Marine Conductor." Advanced Materials Research 233-235 (May 2011): 2043–46. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.2043.

Full text

Abstract:

At present, offshore drilling operations often use buttress thread casing as surface casing. The design conception of buttress thread casing comes from the offshore drilling’s demands and this kind of casing is mainly used as surface casing. This paper has taken material mechanical experiment, numerical simulation analysis and field test, the research results show that the various parameters of buttress thread casing fully complies with the drilling design requirements and the offshore oilfield production demands. This product can reduce drilling cost effectively, improve working efficiency and safety, and realize manufacture domestically. Meanwhile, the development of this project will fill the blank of the ERW (Electrical Resistance Weld) casing in CNOOC (China National Offshore Oil Corporation), and have a broad prospect of application.

APA, Harvard, Vancouver, ISO, and other styles

20

Holland, Dutch, David M. Pritchard, and Pradeep Anand. "Seven Drilling Myths - Managing Successful Drilling Operations." Journal of Petroleum Technology 55, no. 09 (September 1, 2003): 44–48. http://dx.doi.org/10.2118/0903-0044-jpt.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

An, Byoung-Ky, and Hyun-Jung Oh. "Semi-submersible Drilling Rig and Drilling Equipment." Journal of Ocean Engineering and Technology 26, no. 6 (December 31, 2012): 86–92. http://dx.doi.org/10.5574/ksoe.2012.26.6.086.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

SUN, Hao, and Kazuomi KUSUMOTO. "Drilling Performance of Plasma Arc Drilling Method." QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 28, no. 4 (2010): 421–26. http://dx.doi.org/10.2207/qjjws.28.421.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Zazarli Shah, Mohamad Safwan, Arina Sauki, Wan Zairani Wan Bakar, Nurul Aimi Ghazali, and Azlinda Azizi. "Drilling Fluid Design for Shale Gas Drilling." Advanced Materials Research 1113 (July 2015): 617–24. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.617.

Full text

Abstract:

Shale gas nowadays is an important source of unconventional gas. The limited conventional gas supply makes the unconventional sources as a new source of gas. In this research, the aim is to design a mud formulation that can carry out essential functions of mud for shale gas drilling. Commonly for shale gas drilling, water based mud is used. However, water based mud is ineffective when dealing with water-sensitive shale. The alternative way to deal with this type of shale is using synthetic-based mud (SBM) or oil-based mud (OBM). OBM is an effective mud while drilling well. However, it is toxic and gives negative impact to environment. SBM somehow is more environmental friendly compared to oil based and ester is one of the synthetic based fluids. In order to prove this statement, a toxicity test was carried out to investigate the impact of ester based mud on selected marine life. The results of the test were compared with past research results. The ester use in this research is methyl-ester C12-C14 derived from palm oil and the mud was formulated at different oil-water ratios which are 70/30, 80/20 and 90/10, respectively and the best rheological performance can be seen at 80/20 oil-water ratio. Then, the performance of this mud had been compared to other types of mud which are sarapar-based and WBM. The findings revealed that the rheological performance of ester based mud is comparable with common based mud used for shale gas drilling. Apart from that, it is less toxic than other based mud which can maintain 60% prawn’s survival even after 96 hours exposure in 100,000 ppm of mud concentration in artificial seawater.

APA, Harvard, Vancouver, ISO, and other styles

24

Bybee, Karen. "Drilling-Fluid Rheology Under Deepwater Drilling Conditions." Journal of Petroleum Technology 51, no. 11 (November 1, 1999): 36–39. http://dx.doi.org/10.2118/1199-0036-jpt.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Khojibergenov Davlatbek Turganbekovich, Yanyushkin Aleksandr Sergeyevich, Khozhibergenova Umida Davlatbekkyzy, Ibragimova Zaure Assilbekovna, Sherov Karibek Tagayevich, and Absadykov Bakhyt Narikbayevich. "DRILLING TOOL WITH NEGATIVE DRILLING FORCE VALUE." NEWS of National Academy of Sciences of the Republic of Kazakhstan 1, no. 433 (February 15, 2019): 169–75. http://dx.doi.org/10.32014/2019.2518-170x.21.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Barhate, Abhijit, Piyush Patel, and Egil Abrahamsen. "Real-time drilling optimisation – driving drilling excellence." APPEA Journal 59, no. 1 (2019): 196. http://dx.doi.org/10.1071/aj18231.

Full text

Abstract:

Here we explore a real-time solution that anticipates drilling events and avoid delays caused by such issues as poor hole cleaning, higher torque and drag, swab and surge, stuck pipe, lost circulation, formation damage and wellbore instability. This is important if drilling optimisation is a major technical and corporate goal or if you wish to go beyond the traditional approach of collecting real-time data only to monitor operations. The presented state-of-the-art ‘real-time drilling optimisation’ solution creates a dynamic, real-time picture of the entire wellbore and key drilling variables and parameters using advanced, tightly coupled thermodynamic, hydraulic and mechanical drilling models and trend analysis applications to anticipate potential drilling issues in real-time while drilling. The solution can also be used to perform scenario based ‘what-if’ analysis and ‘look-ahead’ simulations of drilling operation with the purpose to analyse outcome of alternative operating scenarios. This is an effective solution that simplifies real-time data analysis by using trends and deviations between modelled and actual data to predict changing wellbore conditions and developing a digital twin of a wellbore. This paper includes robotic drilling automation, aimed at reducing invisible loss time, enhancing drilling efficiency and safety by applying operational safeguards to the drilling control system, providing automatic safety mechanisms and enabling automatic sequences. This paper highlights technical cases demonstrating how this analytic solution not only auto-detects symptoms (which can lead to drilling events or hazards, invisible loss time and non-productive time) but also optimises drilling performance through simulation well ahead of time, thus driving drilling efficiency.

APA, Harvard, Vancouver, ISO, and other styles

27

GARZONIO, ROBERTO, BIAGIO DI MAURO, DANIELE STRIGARO, MICOL ROSSINI, ROBERTO COLOMBO, MATTIA DE AMICIS, and VALTER MAGGI. "Mapping the suitability for ice-core drilling of glaciers in the European Alps and the Asian High Mountains." Journal of Glaciology 64, no. 243 (December 11, 2017): 12–26. http://dx.doi.org/10.1017/jog.2017.75.

Full text

Abstract:

ABSTRACTIce cores from mid-latitude mountain glaciers provide detailed information on past climate conditions and regional environmental changes, which is essential for placing current climate change into a longer term perspective. In this context, it is important to define guidelines and create dedicated maps to identify suitable areas for future ice-core drillings. In this study, the suitability for ice-core drilling (SICD) of a mountain glacier is defined as the possibility of extracting an ice core with preserved stratigraphy suitable for reconstructing past climate. Morphometric and climatic variables related to SICD are selected through literature review and characterization of previously drilled sites. A quantitative Weight of Evidence method is proposed to combine selected variables (i.e. slope, local relief, temperature and direct solar radiation) to map the potential drilling sites in mid-latitude mountain glaciers. The method was first developed in the European Alps and then applied to the Asian High Mountains. Model performances and limitations are discussed and first indications of new potential drilling sites in the Asian High Mountains are provided. Results presented here can facilitate the selection of future drilling sites especially on unexplored Asian mountain glaciers towards the understanding of climate and environmental changes.

APA, Harvard, Vancouver, ISO, and other styles

28

Kohantorabi, Mostafa, Amirhooman Hemmasi, Mohammad Talaeipour, Mehran Roohnia, and Behzad Bazyar. "Effect of artificial inhomogeneity of density and drilling on dynamic properties developed by poplar block species (Populus nigra) jointed with oak wood (Quercus castaneifolia) beams." BioResources 15, no. 3 (May 5, 2020): 4711–26. http://dx.doi.org/10.15376/biores.15.3.4711-4726.

Full text

Abstract:

Inhomogeneities in wood and wood products are evident. Sometimes these inhomogeneities are combined with other inhomogeneities such as drilling. Each can have different effects on dynamic properties, and these footprints can cause hidden defects in wood and wood products. In this research, the effects of artificial inhomogeneity of density and drilling diameters (1 mm, 3 mm, 5 mm, and 10 mm) on dynamic properties of the beams produced from oak wood jointed with poplar blocks (one at the end and the other at the central part of the beam) were investigated. Free vibration on a free-free beam test was subjected for the evaluations. The results indicated that factors such as dynamic modulus of elasticity, acoustic coefficients, and damping capacity, were affected by both inhomogeneity and drillings. The acoustical converting efficiency showed the exact location of inhomogeneity. It also showed the level of drilling diameter.

APA, Harvard, Vancouver, ISO, and other styles

29

dos Reis, Alcione, Rosemar Batista da Silva, Lucas Gonçalves Silva, Álisson Rocha Machado, Rosenda Valdés Arencibia, Rodrigo de Souza Ruzzi, Mark James Jackson, and Rodrigo Panosso Zeilmann. "Analyses of two manufacturing systems in drilling of CGI: drilling and reaming × drilling." International Journal of Advanced Manufacturing Technology 106, no. 7-8 (January 2, 2020): 2861–74. http://dx.doi.org/10.1007/s00170-019-04833-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Molepo, Maketo, Erik Hohmann, Sinmiloluwa Oduoye, Jolandie Myburgh, Reinette van Zyl, and Natalie Keough. "TRANSCORACOID DRILLING FOR CORACOCLAVICULAR LIGAMENT RECONSTRUCTIONS IN PATIENTS WITH ACROMIOCLAVICULAR JOINT DISLOCATIONS RESULT IN ECCENTRIC TUNNELS." Orthopaedic Proceedings 105-B, SUPP_15 (November 7, 2023): 21. http://dx.doi.org/10.1302/1358-992x.2023.15.021.

Full text

Abstract:

This study aimed to describe the morphology of the coracoid process and determine the frequency of commonly observed patterns. The second purpose was to determine the location of inferior tunnel exit with superior based tunnel drilling and the superior tunnel exit with inferior based tunnel drilling.A sample of 100 dry scapulae for the morphology aspect and 52 cadaveric embalmed shoulders for tunnel drilling were used. The coracoid process was described qualitatively and categorized into 6 different shapes. A transcoracoid tunnel was drilled at the centre of the base. Twenty-six shoulders were used for the superior-inferior tunnel drilling approach and 26 for the inferior-superior tunnel drilling approach. The distances to the margins of the coracoid process, from both the entry and exit points of the tunnel, were measured.Eight coracoid processes were of convex shape, 31 of hooked shape, 18 of irregular shape, 18 of narrow shape, 25 of straight shape, and 13 of wide shape. The mean difference for the distances between superior entry and inferior exit from the apex was Powered by Editorial Manager® and ProduXion Manager® from Aries Systems Corporation 3.65+3.51mm (p=0.002); 1.57+2.27mm for the lateral border (p=0.40) and 5.53+3.45mm for the medial border (p=0.001). The mean difference for the distances between inferior entry and superior exit from the apex was 16.95+3.11mm (p=0.0001); 6.51+3.2mm for the lateral border (p=0.40) and 1.03+2.32 mm for the medial border (p=0.045).The most common coracoid process shape observed was a hooked pattern. Both superior to inferior and inferior to superior tunnel drilling directed the tunnel from a more anterior and medial entry to a posterior-lateral exit. Superior to inferior drilling resulted in a more posteriorly angled tunnel. With inferior to superior tunnel drilling cortical breaks were observed at the inferior and medial margin of the tunnel.

APA, Harvard, Vancouver, ISO, and other styles

31

Hamanaka, Ryo, Toshiro Emori, Mizuki Ohama, Kana Yamamoto, Yui Horiguchi, and Noriaki Yoshida. "The Impact of Drilling Guide Length of a Surgical Guide on Accuracy of Pre-Drilling for Miniscrew Insertion." Applied Sciences 14, no. 1 (December 24, 2023): 177. http://dx.doi.org/10.3390/app14010177.

Full text

Abstract:

Background: Temporary anchorage devices (TADs) are broadly used in orthodontic treatment. TADs must be placed accurately to avoid collision against tooth roots. To place miniscrews with a higher accuracy, a digitally designed surgical guide was proposed in previous studies. However, to our knowledge, there have been no articles that have assessed the minimal required length to achieve good drilling accuracy. The objective of the present study was to evaluate the accuracy of pre-drilling using computer-aided designed surgical guides with different lengths. Methods: A typodont model was scanned, and surgical guides of 3.0, 4.5, and 6.0 mm were designed. Duplicated typodonts and the surgical guides were printed with a 3D printer. Using these models and surgical guides, pre-drillings were performed. Freehand drilling was also conducted for the control. The drilled models were scanned with micro-computed tomography to evaluate the accuracy. Results: The mean errors at the tip of the drill were 0.44 mm, 0.61 mm, 0.41 mm, and 0.24 mm for the freehand drilling, and 3.0, 4.5, and 6.0 mm for the surgical guide, respectively. Conclusion: The results suggested that a longer surgical guide was recommended to achieve good insertion accuracy for a narrow interradicular space, and that 3.0 mm was enough when an error of 1.0 mm was acceptable for the insertion site.

APA, Harvard, Vancouver, ISO, and other styles

32

Bower, Bruce. "Mystery Drilling." Science News 169, no. 14 (April 8, 2006): 213. http://dx.doi.org/10.2307/4019171.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Linden, Eugene. "Drilling deep." New Scientist 255, no. 3399 (August 2022): 25. http://dx.doi.org/10.1016/s0262-4079(22)01438-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Stewart, Alison. "Joseph Drilling." Art Bulletin 70, no. 1 (March 1988): 141. http://dx.doi.org/10.2307/3051161.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

TANAKA, SHOICHI. "Scientific drilling." Journal of the Japanese Association for Petroleum Technology 52, no. 5 (1987): 466–77. http://dx.doi.org/10.3720/japt.52.466.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Hofer, Ursula. "Drilling deeper." Nature Reviews Microbiology 11, no. 8 (June 24, 2013): 508–9. http://dx.doi.org/10.1038/nrmicro3071.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Farrell, John. "Drilling Crew." Oceanography 19, no. 4 (December 1, 2006): 123. http://dx.doi.org/10.5670/oceanog.2006.22.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Cooper, George A. "Directional Drilling." Scientific American 270, no. 5 (May 1994): 82–87. http://dx.doi.org/10.1038/scientificamerican0594-82.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Sweet, William. "Drilling Directions." IEEE Spectrum 49, no. 11 (November 2012): 92. http://dx.doi.org/10.1109/mspec.2012.6341231.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

HESS, GLENN. "DRILLING CHEMICALS." Chemical & Engineering News 87, no. 33 (August 17, 2009): 28–29. http://dx.doi.org/10.1021/cen-v087n033.p028.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

HESS, GLENN. "ARCTIC DRILLING." Chemical & Engineering News Archive 84, no. 4 (January 23, 2006): 10. http://dx.doi.org/10.1021/cen-v084n004.p010.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Blackman, R. A. A. "Drilling wastes." Marine Pollution Bulletin 21, no. 5 (May 1990): 257–58. http://dx.doi.org/10.1016/0025-326x(90)90352-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Prentice, Rachel. "Drilling Surgeons." Science, Technology, & Human Values 32, no. 5 (September 2007): 534–53. http://dx.doi.org/10.1177/0895904805303201.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Gonçalves, Sérgio. "Punching drilling." Metálica, no. 26 (December 31, 2022): 40–41. http://dx.doi.org/10.30779/cmm_metalica_mi26_06.

Full text

Abstract:

The objective of this article is to present the rules to be practiced by steelworking companies, in order to ensure that the manufacturing processes established for the execution of the products are in conformity, allowing the certification with CE marking of these products according to EN 1090. The rules presented here apply to the execution of holes for screws or bolts.

APA, Harvard, Vancouver, ISO, and other styles

45

Carpenter, Chris. "Slide-Drilling Guidance System Optimizes Directional Drilling Path." Journal of Petroleum Technology 72, no. 05 (May 1, 2020): 66–67. http://dx.doi.org/10.2118/0520-0066-jpt.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Zheng, Li Hui, Ming Wei Zhang, and Yong Lin. "A Multifunctional Drilling Fluid for Coalbed Methane Drilling." Advanced Materials Research 455-456 (January 2012): 1317–23. http://dx.doi.org/10.4028/scientific5/amr.455-456.1317.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Denney, Dennis. "Electrical Coiled-Tubing Drilling: A Smarter Drilling System." Journal of Petroleum Technology 51, no. 10 (October 1, 1999): 32–33. http://dx.doi.org/10.2118/1099-0032-jpt.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Zheng, Li Hui, Ming Wei Zhang, and Yong Lin. "A Multifunctional Drilling Fluid for Coalbed Methane Drilling." Advanced Materials Research 455-456 (January 2012): 1317–23. http://dx.doi.org/10.4028/www.scientific.net/amr.455-456.1317.

Full text

Abstract:

With extremely complicated geological conditions, there is abundant coalbed methane in the China's Ordos Basin Area. As a result of coexistence of different pressure systems in the same one naked well section, there are so many problems taking place occasionally during the drilling process, such as the formation lost circulation and collapse, which require the drilling fluid with a perfect rheology behavior and inhibitive to improve the well-bore containment. The coalbed methane well completions are diverse, usually including vertical well, horizontal well, multi-branch well, and other different well types. So the drilling fluid must have cuttings carried effectively and protect formation damaged to ensure that the process of drilling is security and smooth. Lots of drilling methods are used in the coalbed methane drilling, besides normal nearly balanced drilling, the under balance drilling fluids such as the air, fog, foam, etc particularly improved. All this drilling fluids require itself working compatibility with other fluids in the hole. Therefore, the special state-funded science and technology project has developed a novel bionic Fuzzy-Ball drilling fluid to meet the coalbed methane. Without additional equipments, this novel drilling fluids can be made, with non-solid phase and low density, 0.8~1.0 g/cm3. The inert solids can also be used to adjust the property to more than 1.0g/cm3, matching the near/under-balanced drilling. The formation well-bore containment can effectively improve to meet to the more than 1000 meters coalbed methane drilling in the open or low pressure formation, To portable cuttings effectively under low rate, the ratio of yield point and plastic viscosity can be adjusted to 1.0Pa/mPa•s or more. Combined with the air drilling, this novel Fuzzy-Ball material could not be converted to fluid to solve the formation water production, cavings, completion and other operations. 10 wells application of using the Fuzzy-Ball drilling fluid to complete the coal bed methane wells overcoming water production, collapse, lost circulation and air drilling etc, taking five branches well FL-H2-L, "U" horizontal well DFS-02-H2, water production and collapse well J35, air drilling CLY22 for examples, are introduced to indicate the bionic Fuzzy-Ball fluid application on the coalbed methane drilling spot.

APA, Harvard, Vancouver, ISO, and other styles

49

MATSUOKA, HIROSHI. "The Drilling Technology of the Ocean Drilling Program." Journal of the Japanese Association for Petroleum Technology 56, no. 5 (1991): 449–58. http://dx.doi.org/10.3720/japt.56.449.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Wilson, Adam. "Mitigating Drilling Dysfunction With a Drilling Advisory System." Journal of Petroleum Technology 68, no. 10 (October 1, 2016): 69–70. http://dx.doi.org/10.2118/1016-0069-jpt.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!