Application of the Advanced Methods to Investigate Incidents and Drilling Engineering Principles to Prevent Critical Wear-Out of Downhole Equipment When Drilling Wells in Chayandinskoye Field

2021 ◽  
Author(s):  
Nikolay Valerevich Abaltusov ◽  
Anton Sergeevich Ryabov ◽  
Artem Evgenevich Perunov ◽  
Sergey Sergeevich Rublev ◽  
Sergey Aleksandrovich Mitrokhin ◽  
...  
Keyword(s):  
The Other ◽  
Problem Analysis ◽  
Directional Drilling ◽  
Expert Review ◽  
Incident Investigation ◽  
Risk Increase ◽  
Drilling Tools ◽  
Investigation Methods ◽  
Drilling Engineering ◽  
Equipment Wear

Abstract The pressing challenge is the abnormally rapid wear of well logging equipment and drilling tools when drilling wells in pay zone of Chayandinskoye field. Wear-out of BHA stabilizers within one run makes directional drilling inefficient and results in additional trips to replace equipment. Wear-out of drill pipes results in emergencies risk increase. To prevent such incidents the necessity arises to conduct an unscheduled inspection, reject and replace drilling tools. All these conditions entail increase in drilling time and decline in profitability. Problem analysis and expert review was made by drilling optimization specialists from DD Contractor jointly with the experts from R&D Center and Operator Company. This paper discusses how cooperation of the engineers from three companies as well as a particular approach to incident investigation and drilling engineering made it possible to identify the most critical factors, which contribute to a standard BHA wear, to work out measures to prevent similar situations in future and select an alternative BHA. The gained experience has been successfully disseminated to the other wells in Chayandinskoye field and other fields in Eastern Siberia; and the incident investigation methods and drilling engineering procedures are effectively applied under the other projects.

scholarly journals Rotary steerable systems: mathematical modeling and their case study

2021 ◽  
Vol 11 (6) ◽  
pp. 2743-2761
Author(s):  
Caetano P. S. Andrade ◽  
J. Luis Saavedra ◽  
Andrzej Tunkiel ◽  
Dan Sui
Keyword(s):  
Directional Drilling ◽  
Steering Control ◽  
Fundamental Physics ◽  
Drilling Tools ◽  
Drilling Operations ◽  
Beam Bending ◽  
Extended Reach Drilling ◽  
And Control ◽  
2D And 3D

AbstractDirectional drilling is a common and essential procedure of major extended reach drilling operations. With the development of directional drilling technologies, the percentage of recoverable oil production has increased. However, its challenges, like real-time bit steering, directional drilling tools selection and control, are main barriers leading to low drilling efficiency and high nonproductive time. The fact inspires this study. Our work aims to contribute to the better understanding of directional drilling, more specifically regarding rotary steerable system (RSS) technology. For instance, finding the solutions of the technological challenges involved in RSSs, such as bit steering control, bit position calculation and bit speed estimation, is the main considerations of our study. Classical definitions from fundamental physics including Newton’s third law, beam bending analysis, bit force analysis, rate of penetration (ROP) modeling are employed to estimate bit position and then conduct RSS control to steer the bit accordingly. The results are illustrated in case study with the consideration of the 2D and 3D wellbore scenarios.

scholarly journals PISA-LIKE MATHEMATICS PROBLEMS: USING TAEKWONDO CONTEXT OF ASIAN GAMES

2019 ◽  
Vol 10 (2) ◽  
pp. 277-288 ◽  
Author(s):  
Dewi Rawani ◽  
Ratu Ilma Indra Putri ◽  
Hapizah Hapizah
Keyword(s):  
Field Test ◽  
Formative Evaluation ◽  
Design Research ◽  
The Other ◽  
Self Evaluation ◽  
Expert Review ◽  
Mathematical Abilities ◽  
Mathematics Problems ◽  
Two Stages ◽  
Reasoning And Argument

This research aims to produce a valid, practical, and having potential effects PISA-like mathematics problems using taekwondo context in Asian Games. The subjects were MIA 3 student of SMA 10 Palembang. This study was design research of development study in which had two stages: the preliminary and formative evaluation. The formative evaluation includes self-evaluation, one-to-one and expert review, small group, and field test. The context is used to have the students estimate maximum numbers of exercising athletes in a hall with a specific size. The result of the analysis shows that the problems which were reviewed by three expert reviews are valid qualitatively based on the PISA framework; it is also practical and easy to understand the problem. Based on the analysis of students’ answer, the developed problems display potential effects on student’s diverse basic mathematical abilities on the various process of answering the problems. The basic mathematics abilities emerging among which are reasoning and argument ability. It appears that students can develop and solve the problem by modeling using their assumptions. Also, the other ability is designing strategies to solve problems in which students use various procedures in solving problems leading the conclusion.

Pushing the Limits in Offshore Mexico

2021 ◽  
Author(s):  
Hector Hugo Vizcarra Marin ◽  
Alex Ngan ◽  
Roberto Pineda ◽  
Juan Carlos Gomez ◽  
Jose Antonio Becerra
Keyword(s):  
Gulf Of Mexico ◽  
Real Time ◽  
Lessons Learned ◽  
Clear Understanding ◽  
Directional Drilling ◽  
Case Histories ◽  
Control Plan ◽  
Drilling Performance ◽  
Drilling Parameters ◽  
Drilling Engineering

Abstract Given the increased demands on the production of hydrocarbons and cost-effectiveness for the Operator's development wells, the industry is challenged to continually explore new technology and methodology to improve drilling performance and operational efficiency. In this paper, two recent case histories showcase the technology, drilling engineering, and real-time optimization that resulted in record drilling times. The wells are located on shallow water in the Gulf of Mexico, with numerous drilling challenges, which typically resulted in significant Non-Productive Time (NPT). Through close collaboration with the Operator, early planning with a clear understanding of offset wells challenges, well plan that minimize drilling in the Upper Cretaceous "Brecha" Formation were formulated. The well plan was also designed to reduce the risk of stuck pipe while meeting the requirements to penetrate the geological targets laterally to increase the area of contact in the reservoir section. This project encapsulates the successful application of the latest Push-the-Bit Rotary Steerable System (RSS) with borehole enlargement technology through a proven drilling engineering process to optimize the drilling bottomhole assembly, bit selection, drilling parameters, and real-time monitoring & optimization The records drilling times in the two case histories can be replicated and further improved. A list of lessons learned and recommendations for the future wells are discussed. These include the well trajectory planning, directional drilling BHA optimization, directional control plan, drilling parameters to optimize hole cleaning, and downhole shocks & vibrations management during drilling and underreaming operation to increase the drilling performance ultimately. Also, it includes a proposed drilling blueprint to continually push the limit of incremental drilling performance through the use of RSS with hydraulics drilling reamers through the Jurassic-age formations in shallow waters, Gulf of Mexico.

scholarly journals Therapy With Agents Acting on the Renin-Angiotensin System and Risk of Severe Acute Respiratory Syndrome Coronavirus 2 Infection

2020 ◽  
Vol 71 (16) ◽  
pp. 2291-2293 ◽  
Author(s):  
Roberto Gnavi ◽  
Moreno Demaria ◽  
Roberta Picariello ◽  
Marco Dalmasso ◽  
Fulvio Ricceri ◽  
...  
Keyword(s):  
Cardiovascular Diseases ◽  
Renin Angiotensin System ◽  
Case Control ◽  
The Other ◽  
Case Control Studies ◽  
Angiotensin System ◽  
Hypertensive Patients ◽  
Renin Angiotensin ◽  
Risk Increase ◽  
Matched Case

Abstract Exposure to agents acting on the renin-angiotensin system was not associated with a risk increase of COVID-19 infection in 2 Italian matched case-control studies, 1 nested in hypertensive patients and the other in patients with cardiovascular diseases or diabetes.

How does the failure of Absorb apply to the other bioresorbable scaffolds? An expert review of first-in-man and pivotal trials

2019 ◽  
Vol 15 (1) ◽  
pp. 116-123 ◽  
Author(s):  
Yuki Katagiri ◽  
Patrick W. Serruys ◽  
Taku Asano ◽  
Yosuke Miyazaki ◽  
Ply Chichareon ◽  
...  
Keyword(s):  
The Other ◽  
Bioresorbable Scaffolds ◽  
Expert Review

Drill Bit Contact Dynamics Including Side Cutting: Simulation and Validation

2017 ◽  
Vol 139 (2) ◽  
Author(s):  
Alfonso Callejo ◽  
Siamak Arbatani ◽  
József Kövecses ◽  
Masoud Kalantari ◽  
Nick R. Marchand
Keyword(s):  
Experimental Validation ◽  
Contact Forces ◽  
Contact Dynamics ◽  
Specific Method ◽  
Directional Drilling ◽  
Simulation Framework ◽  
Finite Segment ◽  
Oil Drilling ◽  
Simulation Techniques ◽  
Drilling Tools

Simulation techniques are increasingly becoming popular in recent years as a way of simulating oil drilling processes. Among them, directional drilling is a specific method that benefits enormously from such numerical techniques, inasmuch as the estimation of the wellbore curvature is crucial and cannot be properly estimated through approximate geometry methods. We present here some of the latest advances in bit contact dynamics, wellbore update algorithms, and experimental validation of side cutting, in the context of a finite element (FE) and finite segment simulation framework. The framework is based on the high-fidelity dynamic simulation of the mechanical system, including detailed geometry, large displacements, and accurate contact forces. The theoretical aspects, along with the experimental results, are thoroughly presented. Overall, this paper constitutes a step toward a more deterministic way of calculating build rates and designing downhole drilling tools.

scholarly journals Effect of month of birth on the risk of suicide

2006 ◽  
Vol 188 (5) ◽  
pp. 416-422 ◽  
Author(s):  
Emad Salib ◽  
Mario Cortina-Borja
Keyword(s):  
Suicide Risk ◽  
Linear Models ◽  
Negative Binomial ◽  
Early Summer ◽  
The Other ◽  
Month Of Birth ◽  
Generalised Linear Models ◽  
England And Wales ◽  
Risk Increase ◽  
New Strategies

BackgroundMonth of birth as a suicide risk factor has not been adequately explored. The findings of published studies are contradictory and inconclusive.AimsTo examine the association between suicide and month of birth using suicide data for a 22-year period in England and Wales. The sample size of 26915 suicides greatly exceeds all previous studies.MethodWe analysed all suicides (ICD-9 codes E950-959) and deaths from undetermined injury (E980-989) reported between 1979 and 2001 in England and Wales for persons born between 1955 and 1966, using Poisson and negative binomial generalised linear models with seasonal components.ResultsBirthrates of people who later kill themselves show disproportionate excess for April, May and June compared with the other months. Overall, we found an increase of 17% in the risk of suicide for people born in the peak month (spring -early summer) compared with those born in the trough month (autumn-early winter); this risk increase was larger for women (29.6%) than for men (13.7%).ConclusionsThe ‘month of birth’ factor in suicide can be interpreted in terms of the foetal origins hypothesis. Our findings might have implications for our understanding of the multifaceted aetiology of suicide and may eventually offer new strategies for research and prevention.

scholarly journals A comparison of NGS and FISH technologies: comprehensive 24-chromosome screening of embryo

1970 ◽  
Vol 21 ◽  
pp. 311-315
Author(s):  
Yu. V. Gontar ◽  
O. Yu. Verlynskyi ◽  
A. Kyrpyi ◽  
I. E. Ylyn ◽  
A. M. Fedota
Keyword(s):  
Preimplantation Genetic Diagnosis ◽  
Assisted Reproductive Technologies ◽  
Genetic Diagnosis ◽  
Reproductive Technologies ◽  
The Other ◽  
Preimplantation Embryos ◽  
Art Programs ◽  
Chromosomal Aneuploidy ◽  
Investigation Methods

Aim. Optimization of the algorithm of complex 24 chromosomes screening in programs of assisted reproductive technologies. Methods. Research of non-disjunction chromosomes in preimplantation embryos based on the results of trophectoderm nucleus diagnostics using FISH and NGS-based CCS. During the preimplantation genetic diagnosis (PGD) on the nucleus by FISH were used probes for chromosomes 13, 16, 18, 21, 22, X, Y. Results. Among the demonstrated cases of embryo diagnosis there was only one embryo that showed a coincidence in the results obtained by different investigation methods. In the other sample, where was diagnosed non-mosaic 18 and 22 monosomy by FISH, the NGS-based CCS showed only monosomy 18. The other embryo had ploidy mosaicism indicated by FISH, but according to NGS results it was evaluated as euploid. Conclusions. Embryos obtained in ART programs must be screened for chromosomal aneuploidy in the preimplantation period to increase the effectiveness in the programs of assisted reproductive technologies, using combination of FISH and NGS methods. Keywords: preimplantation genetic diagnosis, assisted reproductive technologies, aneuploid embryos, NGS, FISH.

Sprawcy i sprawczynie Zagłady a podejście do sprawiedliwości w NRD w latach 1949–1963

2012 ◽  
pp. 237-268
Author(s):  
Wendy Lower
Keyword(s):  
Democratic Republic ◽  
Married Couple ◽  
The Other ◽  
Judicial Process ◽  
Court Records ◽  
State Security ◽  
Investigation Methods ◽  
The Holocaust ◽  
East German ◽  
The 1950S

Drawn from archives of the former German Democratic Republic (GDR), and mainly the files of the Ministry for State Security (Stasi) and regional court records, this essay analyzes two lesser-known trials of Nazi perpetrators of the Holocaust in wartime Galicia. One case features a typical German gendarme convicted but released from prison in the 1950s; the other features a married couple who shot Jews and others on an SS agricultural estate. Both cases highlight East German investigation methods and prosecutors’ use of evidence, while the second affords an opportunity to consider gendered aspects of wartime crimes and postwar trials. On the basis of these cases the author examines how evolving political considerations in the 1950s and 1960s shaped investigations, judicial process s, and sentences against Nazi perpetrators

Field Tests on the Application of Oscillation Tool with a Fluidic Amplifier to Directional Well Drilling

2015 ◽  
Vol 741 ◽  
pp. 599-602
Author(s):  
Jiang Fu He ◽  
He Liu ◽  
Kun Yin ◽  
Xin Gan
Keyword(s):  
Flow Rate ◽  
Pressure Pulse ◽  
Field Tests ◽  
Test Results ◽  
Directional Drilling ◽  
Drilling Tool ◽  
Well Drilling ◽  
Operation Process ◽  
Drilling Tools ◽  
Drilling Technology

The directional well drilling technology is extensively utilized and developed throughout the world. However, series of drilling problems occurred in the operation process of directional drilling. In order to reduce the friction of drilling tools, an oscillation tool with a fluidic amplifier has been field tested, and the pressure pulse of oscillation tool has been obtained. Field test results have shown that the oscillation tool has an extensive flexibility to directional well drilling, and the oscillation tool could stably actuate the drilling tool to have reciprocating vibration, which contributes to the friction and drag reduction of drilling tools. Furthermore, it can be concluded that the pressure pulse value generated by pumped fluid varies with input flow rate, and the pressure of oscillation tool increases while the flow rate is increasing. In addition, the motion frequency of the oscillation tool is exponentially increasing with the raise of pumped flow rate.

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