bluuebunny/crossref_metadata_2025_split huggingface dataset:
Torsional Drillstring Vibration Modelling and Mitigation with Feedback Control
Authors: Pehlivantürk Can , Chen Dongmei , van Oort Eric 
Published: March 2017

Abstract
Existing controllers that are used in the field to reduce stick-slip induced torsional vibrations have certain shortcomings, especially when it comes to higher order dynamics. This paper proposes a feedback controller based on frequency-domain loop-shaping techniques for torsional vibration mitigation in drillstrings.
The new feedback controller is designed such that the closed-loop system is stable with adequate gain margin for robustness. As a proof of concept, a 35 degree of freedom lumped mass drill string laboratory testbed was developed that utilizes precision inertial masses and a state-of-the-art motion tracking system. The physical testbed is used to tune and verify the mathematical model upon which feedback controller is built. The controller is also tested on the physical testbed.
Using the physical testbed, the performance of the controller is compared with the existing techniques that are applied in the field, such as the Soft Torque Rotary System. Significant performance increases are observed. The closed loop system with the proposed controller exhibits much less bit velocity increase after a stick phase, which is thought to be one of the main contributing factors to bit and bottom-hole assembly (BHA) damage. The controller also effectively mitigates the self-excited vibrations during drilling speed changes.
Frequency-domain loop-shaping techniques are applied extensively in the Aerospace field. However, it is not yet applied in drilling. The main contribution of this paper is the introduction of this new methodology of developing high performance feedback controllers for stick-slip mitigation. From an operational perspective, the effective elimination of unwanted bit velocity increase would significantly reduce bit damage and off-bottom time, and in turn improve drilling performance.
Application of Deep Directional Resistivity Reservoir Mapping Tool on Arctic Field Development – Case Studies from the Goliat Field in the Barents Sea
Authors: Gianbattista Tosi , Wang Haifeng , Denichou Jean-Michel 
Published: March 2017

Abstract
The Goliat field development is challenging because of its extreme and remote environment in Barents Sea. The field consists of two separate main reservoirs, Realgrunnen and Kobbe, both having complex structural setting with a high number of faults and considerable reservoir heterogeneity. In order to maximize production, producer wells usually navigate through several sand sequences. In addition, proximity to oil-water-contact (OWC) in the Kobbe formation has to be considered to avoid early water break through.
Eni Goliat team selected deep directional resistivity reservoir mapping LWD technology for geosteering and detecting payzone remotely. Being able to map multiple formation layers away from the wellbore, the service helped G&G team to optimize well paths during drilling to achieve the target sand exposure in the different sequences.
The results presented here on both the Realgrunnen reservoir and Kobbe reservoir were excellent. The producer well C was successfully geosteered in the upper sands in Realgrunnen reservoir, achieving a NTG of 70% despite the presences of subseismic scale faults and lateral facies heterogeneities along the well.
For the producer well E in the Kobbe reservoir, although the well was landed deep and close to OWC because the top reservoir came 11 meter deeper than prognosis, the accurate mapping of the top reservoir, OWC, and optimizing the well path, helped to support the decision to build aggressively and level out at optimal TVD, achieving 340 meters in the Kobbe 9 sand.
This communication will present also how cautious and in-depth evaluation, extensive pre-drilling study and operation planning enabled efficient geosteering of the horizontal producers in this challenging environment and maximizing productivity delivered. Post drilling, the mapping of the reservoir structure and fluid contacts were used as inputs to the static model and integrated into future development plans.
Remote Toe Isolation in ERD Wells Using an RFID-Actuated Circulating Toe Sleeve CTS A case study
Authors: Vázquez Karina , Murdoch Euan 
Published: March 2017

Abstract
One of the main challenges in the oil industry is to reduce well intervention costs. This paper will explain the planning and execution of an application in the Middle East in which Radio Frequency Identification (RFID) technology has been incorporated into a Circulating Toe Sleeve (CTS) to close and operate the tool remotely. Using the remotely activated CTS tool eliminates the need for additional intervention equipment and subsequently reduces the operational cost and risk involved in isolating and testing liners in Extended Reach Drilling (ERD) wells.
The remotely activated CTS will be located at the toe of a plugged Pre-Perforated Liner (PPL). The RFID CTS tool will be run open so that the liner can be circulated in. When the liner assembly is at the desired depth, it will be activated either by circulating RFID tags to the tool or allowing a timer to elapse. Once the CTS has been closed, it will prevent communication between the liner and the wellbore, thereby functioning as a barrier and allowing the liner assembly to be pressure tested.
The use of a standard circulating toe sleeve to provide liner isolation would typically result in significant costs and risks for the operator. These could be incurred in intervention time, additional service personnel on location, and budgeting for the risks associated with intervention. In ERD applications it may not be technically possible to provide an intervention solution to all parts of the well, especially the toe section. The use of a remotely activated CTS can reduce all of these considerations and make ERD wells economical and technically feasible. The potential savings this technology can bring increase by an order of magnitude when applied offshore/subsea.
Successful Multi-Well Deployment of a New Abandonment System for a Major Operator
Authors: Stokkeland Thore Andre , McNicol Jim , McWilliam Gary 
Published: March 2017

Abstract
Service companies were challenged by a major operator to come up with a solution to set a barrier against the overburden and to circulate oil based mud out of the annulus between the 10-3/4 in. and 13-3/8 in. casings before pulling the wellhead. The most common industry solution to this challenge is to cut the 10-3/4 in. casing by the 13-3/8 in. shoe and pull the casing to surface. An innovative new downhole tool based abandonment system was developed and successfully deployed to meet this objective.
The first stage of the operation was to run a perforation gun loaded with one foot of 18 shots per foot of a proprietary abandonment charge (single casing perforation gun) to just below the wellhead at 475 ft. Then perforate the 10-3/4 in. casing with 0.8 inch diameter holes without damaging the 13-3/8 in. casing behind, to create a circulation path.
The second stage was to run a V0 rated Retrievable Bridge Plug, RBP, with another one foot long perforation gun below. Set the V0 rated RBP and perforate just above the 13-3/8 in. shoe at 2,300 ft. then establish circulation up to the shallow perforations above and circulate out the oil based mud in the 10-3/4 in. by 13-3/8 in. annulus above. After the circulation parameters were established, a wash pill was pumped around the annulus to clean out all the oil based mud.
The third step was to set the actual overburden barrier in both the A and B annulus. This was done by displacing cement through the ball valve of the V0 rated RBP into the perforations below the RBP; placing the cement plug below and into the 10-3/4 in. × 13-3/8 in. annulus. The ball valve was closed and a cement plug was pumped on top of the RBP completing the barrier. The barrier was verified by pressure testing through the shallow perforations to 1,000 psi above the seawater gradient. A barrier was in place in both A and B annuli.
This procedure was deployed on four wells for a major operator on the Leadon South Field in the North Sea with great success. The operations were flawlessly executed with each well taking less than 18.5 hours to secure. The successful operation saved the major operator considerable time and expense by eliminating the need for cutting and pulling the 10-3/4 in. casing to get the oil based mud out of the annulus before removing the wellheads.
This paper provides an overview of the innovative new abandonment system elements and describes the successful deployment operation in detail.
API Specification 16 RCD Demystifying Rotating Control Device Manufacturing Specifications for Operations
Authors: Dow Blaine , Kamps Charley , Cremer Justin , Conn John , Mettai Adel 
Published: March 2017

Abstract

Objective/Scope
The rotating control device is an integral piece of equipment for managed pressure and underbalanced drilling applications. In 2005, a joint IADC/SPE committee, collaborating with American Petroleum Institute, authored specification guidelines first published as API-16 Specification RCD (API-16 RCD). Does applying a manufacturing specification as a control for operations really minimize risk, or does it limit liability? This paper will outline the journey toward API-16 RCD certification, gaps identified between testing results and operating guidelines, and methodology applied to field performance data to bridge test data with real-life performance expectations.

Method/Procedure/Process
Analysis of a large laboratory test data set has been accumulated for the API-16 RCD application process. Meanwhile, a much larger data set of field performance has been accumulated over several years from live operations throughout the world.
In an effort to seek continuous performance improvement, interrogating the data to determine a proper base line for performance was initiated. It became apparent that determining this base line was challenging, given the wide range of variables. However, through systematic data analytics, along with improved field data capture guidelines, normalizing these variables enabled operating data to validate performance inferences drawn from the existing lab data.

Results/Observations/Conclusions
Several hundred field runs were compared against more than 50 independent lab tests to determine links. Through comprehensive data analysis, along with acknowledgement of the scientific limits understanding elastomer performance over conditions and time, RCD testing in the lab is better able to predict field performance, serving as a suitable alternative to costly fit-for-purpose field simulation testing. Additionally, this methodology better guides technology improvements required to expand performance criteria.

Novel/Additive Information
Replicating field conditions in controlled laboratory tests requires a significant range of variables beyond RPM, temperature and pressure. For example, field failures have resulted from chemical factors such as mud compatibility at a range of temperatures, or physical factors such as drillpipe condition and rig alignment. Some in industry view fit-for-purpose testing as a solution, but this can become cost prohibitive for service providers and operators alike. This paper will document viable alternatives.
Efficiency Improvement in the Bakken Realized Through Drilling Data Processing Automation and the Recognition and Standardization of Best Safe Practices
Authors: Duffy W. , Rigg J. , Maidla E. 
Published: March 2017

Abstract
Technological advancements continuously change in the oil and gas industry and shape drilling performance. Trends point toward increased automation at the rig but there will likely always maintain an element of human touch. By incorporating an automated drilling state detection monitoring service, best-safe-practices were identified and standardized, allowing for a significant increase in rig efficiency.
A best-safe-practices initiative was implemented that included the following process:
Rigorous measurement of rig activities: A third-party service carefully quality-controlled the data feed and automatically determined the rig state. Rigorous measurement of human activity: The rigs' activities were transformed into meaningful performance information on individual crews following a data classification process and aggregation of rig operations. Recognition of safe working rates: The performance data provided by the monitoring service identified the most consistent and efficient crews to help observe their methods and share with the other crews. A teamwork environment: Involvement of stakeholders to help produce actionable plans with clear accountabilities Transparency: Sharing of the measurements with all stakeholders, including the drilling contractor, to further improve the process Safety first: Through transparency and a no-blame culture, it was possible to identify actionable items, such as new processes and additional personnel training.
The following case study focuses on the Weight to Weight (W2W) connection time during drilling operations and dissects these activities to reveal identified improvement opportunities. Efforts resulted in a savings of more than 11.75 days on a single pad of nine wells drilled by the same rig and a 45-percent improvement in overall non-drilling time.
Automated Trend-Based Alerting Enhances Real-Time Hazard Avoidance
Authors: Mickens Roscoe , Kumar Dev , Smith Gregory , Cheatham Curtis 
Published: March 2017

Abstract
A method is presented to efficiently analyze drilling data using trend analysis to predict downhole hazards and allow proactive decision making. The workflow is a data-driven process that provides analysis on both real-time (RT) and historical drilling events. For RT application, the method provides the user with an alert functionality prior to the hazardous events occurring. This method is designed to augment the Real-Time Operation Center (RTOC) to provide additional layers of real-time predictive capabilities, historical hindsight, situational awareness, and hazard avoidance. A software program has been developed to incorporate the methodology into a real-time workflow.
The core tenet of drilling hazard management (DHM) is process awareness, which is more relevant than ever in the industry. Routine activities such as daily drilling reports (DDR) analysis and manual RT data analysis such as planned versus actual (PVA) data are time consuming and not very efficient because they are highly dependent on the skill sets and experience of the personnel. By using a standardized automated trend analysis, time- or depth-based data can be analyzed to determine the risks and downhole hazards involved in the drilling and completion operations.
This paper presents on-bottom analysis on historical wells to show how trend deviation is used to identify potential hazards before they occur. The trend analysis uses percent deviation for specific parameters, such as standpipe pressure, surface torque, flow rate and hookload, to alert the user when thresholds for normal operations have been exceeded. This logic was developed and validated using more than 50 wells throughout the world, and the logic's thresholds were calibrated from these test cases. Alerts are triggered only when criteria for specific hazards are met.
This method champions hazards avoidance through prevention and ultimately reduces noproductive time (NPT) in well construction. This system enables efficient and standardized DHM for both real-time and historical analysis. The proactive approach in hazard avoidance helps users to be aware of trend deviation in real-time and increases the user's situational awareness through alerts. The software provides audit capabilities through documenting time-stamped acknowledgment or notes from users. This system also enables faster offset well analysis and supplements real-time data engineers to improve overall efficiency. In this paper you will see real results of how the program performed in a blind testing environment. Results from the test case demonstrate that the program can generate useable alerts well before a potentially hazardous event. The alerts prior to hazardous events could improve situational awareness for rig staff and on-site engineers.
Recorded Dynamics Measurements While Coring Enhances Performance and Recovery
Authors: Jones Steve , Sugiura Junichi , Wood Howard 
Published: March 2017

Abstract
Measurement of downhole dynamics while drilling has become commonplace. However, the use of sensors to measure downhole dynamics while coring has rarely been exploited. This paper will detail the use of compact dynamics sensors strategically placed within the coring assembly. A unique 4" (core diameter) jam mitigation device provides two jam protection, significantly improving core quality and reducing the total economics of obtaining whole core samples. At the occurrence of a core jam, two telescoping liners deploy within the aluminum inner barrel, allowing the ability to mitigate the core jam(s) and continue with coring operations.
Compact downhole dynamics data recorders are strategically embedded in the core hanger (non-rotating) and near-bit stabilizer directly behind the core head (rotating). The data recorders are fitted with 3-axis vibration, 3-axis shock, 3-axis gyros and two temperature sensors. Measurements include shock, vibration, rotation speed (angular velocity in RPM), torsional oscillation, stick-slip and temperature.
The sensors have been deployed on multiple coring applications throughout North America Land (NAL). The data recovered revealed formation related coring dynamics response while transitioning through interbedded intervals. Certain formations produced very high shock and vibration levels that could potentially cause damage to core quality and equipment. The onset of shock and vibration also revealed a significant temperature rise above bottom-hole temperature due to the coring dysfunctions.
This paper will detail the coring dynamics data captured from the sensors. The dynamic response of a coring assembly is significantly different from that of a drilling assembly due to the assembly mechanical dimensions and rock recovery methods. Proprietary software was utilized to merge downhole dynamic recorder data and surface Electronic Drilling Recorder (EDR) data. The software provides a fast and efficient interface to view the merged data, allowing surface and downhole correlation of the information.
Anaphylactic shock secondary to teicoplanin
Authors: Warrener Tim , Southall Paul , Kapur Sandeep 
Published: March 2017

SummaryWe describe a case of anaphylactic shock secondary to the glycopeptide antibiotic teicoplanin. A 35‐yr‐old female presented for a urological procedure due to complications following a previous gynaecological procedure. She reported an allergy to co‐amoxiclav and was therefore given teicoplanin as per our hospital protocol. This precipitated profound anaphylactic shock requiring admission to the intensive care unit. Subsequent immunological testing confirmed teicoplanin as the precipitant. Teicoplanin is only rarely associated with anaphylaxis, however it should be considered in patients suffering from a life‐threatening allergy.
PENGARUH STRATEGI EKSKLUSIF TERHADAP KINERJA LEMBAGA KEUANGAN SYARI’AH
Authors: Mujibatun Siti 
Published: March 2017

<p>This study aims to analyze the marketing performance of Sharia Financial Institutions (LKS) and obtain empirical evidence and find clarity about the effect of Exclusive Strategic on marketing performance of Sharia Financial Institutions by focusing the research on (Arta Surya Barokah Bank, Semarang and Asad Alif Bank, Sukorejo, Kendal). Formally, the contribution of this research is expected to provide contributions to the development of science in the field of Islamic Economics and practically to improve the marketing performance of Sharia Financial Institutions both in terms of fund raising and in its distribution, so that by the year 2010, the target planned by the Bank of Indonesia to obtain 5% of total assets accessed by a conventional bank can be achieved.<br />This research is quantitative by using questionnaire method. While the hypothesis test conducted is based on computing a simple regression analysis. The finding of this study is the absence of significant influence of Exclusive Strategies to increase marketing performance of Sharia Financial Institutions at Arta Surya Barokah Bank Semarang and Asad alif Bank Sukorejo Kendal in 2009, therefore both banks are expected can improve the marketing performance of Sharia Financial Institutions by changing the paradigm of its model in offering product to be more inclusive and familiar with the language that is comprehensible by stakeholders, as a esult it can offset the conventional financial institutions, especially in product of financial marketing.</p>
Transformasi Fungsi Komunikator dan Fungsi Konstruksi Akun Facebook Presiden SBY
Authors: Mardjianto F. X. Lilik Dwi 
Published: March 2017

Abstract: New media in a form of social media has grown rapidly nowadays. The growth of social media is supported by technological advances connected people around the world. They are connected to each other and easily exchange messages. The transformation has finally weakened the media itself. This is a concept paper combining two methodoloies, namely literature review and content analysis of Presiden Yudhoyonoâ€™s Facebook account. This paper reveals that public connectedness within digital era has brought back the media to its original function; media that has only message distribution function, without having message construction function.Â Abstrak: Media baru dalam bentuk media sosial berkembang begitu pesat. Perkembangan yang didukung dengan kemajuan teknologi tersebut telah menciptakan keterhubungan antar orang. Publik terhubung satu dengan yang lain dan saling bertukar pesan. Transformasi peran dan fungsi audiens akibat kemunculan media sosial itu berpotensi mendegradasi fungsi media. Makalah ini adalah makalah konseptual yang menggabungkan dua metodologi, yaitu studi pustaka dan analisis isi sederhana terhadap akun Facebook Presiden Susilo Bambang Yudhoyono. Makalah ini mengungkap bahwa keterhubungan publik di era digital adalah masa ketika media kembali kepada fungsi awalnya, hanya sebagai perantara distribusi pesan, tanpa lagi dilengkapi kemampuan untuk mengemas atau mengonstruksi makna.
Media Sosial dan Peran Manajerial Public Relations PT PLN Persero
Authors: Prastya Narayana Mahendra 
Published: March 2017

Abstract: Social media affect communication technicians and managerial roles in Public Relations (PR). This study observes PR managerial role in PT PLN Persero in the policy making of social media use for the companyâ€™s internal environment. This research use interviews, document studies, and observation as data collection techniques. The results show that the role of communicating the policy is more dominant than the managerial role. Factors influencing PR managerial role are organizationâ€™s recognition on the PR role and function in the organization, the number of personnel in the PR department, and the authority overlap within the organization.Â Abstrak: Media sosial memengaruhi praktek Public Relations (PR) sebagai teknisi komunikasi dan manajerial. Penelitian ini membahas peran manajerial PR d PT PLN Persero dalam penyusunan kebijakan penggunaan media sosial untuk lingkungan internal perusahaan. Penelitian menggunakan metode kualitatif dengan teknik pengumpulan data wawancara, studi dokumen, dan observasi. Hasil penelitian menunjukkan bahwa Bidang Komunikasi Korporat PT PLN Persero sudah melaksanakan peran manajerial walaupun masih didominasi peran mengomunikasikan kebijakan. Peran manajerial PR dipengaruhi oleh pemahaman dan pengakuan formal organisasi terhadap peran dan fungsi PR dalam organisasi, jumlah personel di departemen PR, dan tumpang tindih kewenangan dengan bidang kerja lain dalam organisasi.