Stranger Things 2: Unconventional Deployment Method of High Performance Lightweight Cement Enables Success in Complex Wells

2021 ◽  
Author(s):  
Joe Shine ◽  
Urooj Qasmi ◽  
Ilesanmi Gbemiga
Keyword(s):  
Quality Assurance ◽  
Potential Flow ◽  
High Performance ◽  
Wellbore Stability ◽  
Technical Solution ◽  
Viable Option ◽  
Isolation Requirements

Abstract There are advantages to using high performance lightweight cement when encountering low bottomhole pressures. The most notable are maintaining wellbore stability during cement placement and the isolation of potential flow zones to achieve the wellbore construction objectives. Several complex wells sought these advantages for similar situations. A review of the deployment process for using high performance lightweight cement conventionally, including the quality assurance measures, initially deemed it as not a viable option. As the complex wells needed a technical solution, an unconventional deployment method for high performance lightweight cement enabled its use while simplifying and improving quality assurance; allowing achievement of the isolation requirements.

scholarly journals Performance Assesment of Bauchi Polytechnics and Technical Colleges Using Quality Assurance Indicators in Nigeria Qualification Framework

2016 ◽  
Vol 4 (2) ◽  
pp. 17-26
Author(s):  
Idris Adamu
Keyword(s):  
Quality Assurance ◽  
Vocational Education ◽  
Skill Acquisition ◽  
High Performance ◽  
Technical Colleges ◽  
College Of Education ◽  
Academic Goals ◽  
Medium Level ◽  
Teaching Learning ◽  
High Level

Technical and Vocational Education emphases skill acquisition, Quality Assurance in vocational education is concept that is concerned with high performance involved activities with vocational education such as teaching, learning, infrastructures, student’s behavior and entire academic process. Good quality education is very necessary in the total development of staff and students which ensures proper development, job prospects and the realization of academic goals and objects. Enhanced and sustained to ensure accountability and improve performance. Higher educational institutions in Nigeria continue to experience carelessly attitude about the use of Quality Assurance to understand the risk they are exposed to poor standard. To address these issues, the study embarked upon to determine the level of performance and difference usability of Quality Assurance in Polytechnics and Technical Colleges in Bauchi state. Quantitative method technique was employed using survey questionnaires, 60 staff both senior and junior within these institutions were selected and a questionnaire distributed for their responses. The data were analysed using SPSS software. The result reveals that Federal Polytechnic Bauchi and State Polytechnic Bauchi has high level of Performance about Quality Assurance indicators while College of Education Azare has medium level of Performance. College of education Azare has highest mean rank of 29.87 and percentage of 31.8% obtained from the output result indicated that it has high usability to Quality Assurance, followed by Federal Polytechnic Bauchi with medium usability then State Polytechnic Bauchi has low usability to Quality Assurance. The study concluded by Quality Assurance Unit be made aware to each institution staff to enable recognize the benefits of it. Federal government should give more funding and employ staff to cater the need of Quality Assurance Unit in every institution so that it will help the students to develop their potentialities.

scholarly journals Laponite: a promising nanomaterial to formulate high-performance water-based drilling fluids

2020 ◽  
Author(s):  
Xian-Bin Huang ◽  
Jin-Sheng Sun ◽  
Yi Huang ◽  
Bang-Chuan Yan ◽  
Xiao-Dong Dong ◽  
...  
Keyword(s):  
High Performance ◽  
Drilling Fluid ◽  
Nitrogen Adsorption ◽  
Drill String ◽  
Wellbore Stability ◽  
Fluid Loss ◽  
Drilling Fluids ◽  
Mechanism Analysis ◽  
Water Based ◽  
Inhibition Performance

Abstract High-performance water-based drilling fluids (HPWBFs) are essential to wellbore stability in shale gas exploration and development. Laponite is a synthetic hectorite clay composed of disk-shaped nanoparticles. This paper analyzed the application potential of laponite in HPWBFs by evaluating its shale inhibition, plugging and lubrication performances. Shale inhibition performance was studied by linear swelling test and shale recovery test. Plugging performance was analyzed by nitrogen adsorption experiment and scanning electron microscope (SEM) observation. Extreme pressure lubricity test was used to evaluate the lubrication property. Experimental results show that laponite has good shale inhibition property, which is better than commonly used shale inhibitors, such as polyamine and KCl. Laponite can effectively plug shale pores. It considerably decreases the surface area and pore volume of shale, and SEM results show that it can reduce the porosity of shale and form a seamless nanofilm. Laponite is beneficial to increase lubricating property of drilling fluid by enhancing the drill pipes/wellbore interface smoothness and isolating the direct contact between wellbore and drill string. Besides, laponite can reduce the fluid loss volume. According to mechanism analysis, the good performance of laponite nanoparticles is mainly attributed to the disk-like nanostructure and the charged surfaces.

Four-well comparison in Papua New Guinea: high-risk, high-angle wells demonstrate extended wellbore stability and faster drilling time with inhibitive high-performance water-based fluid

2011 ◽  
Vol 51 (1) ◽  
pp. 119
Author(s):  
Angus Florence ◽  
Mike Dow ◽  
George Shieh ◽  
JV Babu
Keyword(s):  
High Risk ◽  
Papua New Guinea ◽  
High Performance ◽  
Cost Savings ◽  
New Guinea ◽  
Wellbore Stability ◽  
Drilling Fluids ◽  
Water Based ◽  
Performance Decline ◽  
Glycol Fluid

A four-well project located onshore Papua New Guinea provided an opportunity to compare the performance of two inhibitive drilling fluids in the problematic 12¼” interval. Wells A and B were drilled using a conventional KCl/glycol fluid. Wells C and D used a high-performance water-based fluid (HPWBF) containing a shale inhibitor that also provides lubricity. All four wells were drilled with the same rig. The base brine for both fluids was KCl. All hole sections were directionally drilled from vertical to near horizontal by section TD through a claystone interval. Tectonic wellbore breakout was present in all four wells, and the position of the breakout in the wellbore varied from well to well. Well A was regarded as the easiest well to drill due to the breakout being on the sides on the inclined well bore (horizontal), and Well D was regarded as being the most difficult well to drill due to the breakout being located directly on the top and bottom of the wellbore (vertical). Performance comparisons were made using on bottom rates of penetration, tripping times, casing running times, and overall hole section costs. These data have been normalised to remove non hole related NPT events. The KCl/glycol system provided sufficient wellbore stability in Wells A and B with horizontal breakouts and with non-optimal breakouts with very limited openhole exposure. For higher risk wells C and D with non-optimal breakout positions however, the HPWBF offered improved reliability and ensured there was no performance decline. Outstanding performance occurred in Well D where the HPWBF maintained good wellbore stability over a 56-day exposure. Although the KCl/glycol fluid had a lower cost/bbl, improved overall cost savings were achieved by using the HPWBF in the high-risk wells. This paper addresses all operations performed while drilling and casing the 12¼” interval. Possible causes for performance differences are evaluated, taking into account that mud systems represent only one variable. As other variables were introduced progressively, it was possible to back these out to determine mud system effectiveness.

scholarly journals High-Performance Steel Bars and Fibers as Concrete Reinforcement for Seismic-Resistant Frames

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Andres Lepage ◽  
Hooman Tavallali ◽  
Santiago Pujol ◽  
Jeffrey M. Rautenberg
Keyword(s):  
High Performance ◽  
Volume Fraction ◽  
Lateral Displacement ◽  
High Strength ◽  
Longitudinal Reinforcement ◽  
Concrete Compressive Strength ◽  
Viable Option ◽  
Earthquake Resistant ◽  
Steel Bars ◽  
Displacement Reversals

Experimental data are presented for six concrete specimens subjected to displacement reversals. Two specimens were reinforced longitudinally with steel bars Grade 410 (60 ksi), two with Grade 670 (97 ksi), and two with Grade 830 (120 ksi). Other experimental variables included axial load (0 or 0.2fc′  Ag) and volume fraction of hooked steel fibers (0 or 1.5%). All transverse reinforcement was Grade 410, and the nominal concrete compressive strength was 41 MPa (6 ksi). The loading protocol consisted of repeated cycles of increasing lateral displacement reversals (up to 5% drift) followed by a monotonic lateral push to failure. The test data indicate that replacing conventional Grade-410 longitudinal reinforcement with reduced amounts of Grade-670 or Grade-830 steel bars did not cause a decrease in usable deformation capacity nor a decrease in flexural strength. The evidence presented shows that the use of advanced high-strength steel as longitudinal reinforcement in frame members is a viable option for earthquake-resistant construction.

A REVIEW ON METHOD DEVELOPMENT AND VALIDATION BY USING HPLC

2021 ◽  
pp. 34-37
Author(s):  
Dipali S. Doifode ◽  
Shailesh G. Jawarkar ◽  
Monika P. Jadhao ◽  
Manali M. Bode
Keyword(s):  
Quality Assurance ◽  
Analytical Method ◽  
High Performance ◽  
Method Development ◽  
Limit Of Detection ◽  
Science Research ◽  
Hplc Method ◽  
Pharmaceutical Drugs ◽  
Method Development And Validation ◽  
Development And Validation

Analytical method development and validation are the continuous and inter-dependent task associated with the research and development, quality control and quality assurance departments. High performance liquid chromatography (HPLC) has been widely used for years as an analytical method and is a key tool for the separation and analysis of pharmaceutical drugs, for drug monitoring and for quality assurance and life science research. Most of the drugs in multi component dosage forms can be analysed by HPLC method because of the several advantages like rapidity, specicity, accuracy, precision and ease of automation in this method. HPLC methods development and validation play important roles in new discovery, development, manufacture of pharmaceutical drugs and various other studies related to humans and animals. This review gives information regarding principle, types, instrumentation and along with various application of the method and Validation of HPLC method as per ICH Guidelines covers all the performance characteristics of validation, like Accuracy, precision, specicity, linearity, range and limit of detection, limit of quantication, robustness

Sodium Silicate Based Drilling Fluid Application in Gulf of Thailand to Stabilise Wellbore: A Case Study

2021 ◽  
Author(s):  
Waleepon Sukarasep ◽  
Rahul Sukanta Dey ◽  
Visarut Phonpuntin
Keyword(s):  
Sodium Silicate ◽  
High Performance ◽  
Drilling Fluid ◽  
Wellbore Stability ◽  
Drilling Fluids ◽  
Gulf Of Thailand ◽  
Hole Cleaning ◽  
Water Based ◽  
Wellbore Strengthening ◽  
Effective Seal

Abstract Sodium Silicate were first used in water-based drilling fluids to stabilize claystone formations in the 1930's, but found favour in the 1990's in high performance, non dispersed water based systems for drilling problematic claystone formations as an alternative to oil-based drilling fluids. In Bongkot South field, Gulf of Thailand, sodium silicate-based drilling fluid (SSBDF) were used with mixed success in shallow gas drilling. Typically, platform WP-33, the claystone formation of the 12¼" section were drilled with 5% v/v Sodium Silicate in the water based drilling fluid together with excessive circulation as intention to improve hole cleaning frequently result in a wellbore that was overgauge by upto 18.9% in some case. This led to further hole cleaning problem that also compromised cement job quality. A further 6 well campaign on WPS-16 required a re-evaulation of the SSBDF coupled to an understanding of the wellbore instability mechanisms that leads to hole enlargement. To overcome better wellbore stability, sodium silicate has been designed by increased concentration to 8% v/v sodium silicate treated drilling fluid showed optimal design for application base on application of SSBDF has been used on platform WP-11 in 2002. Rheology, hydraulic and flow regime was adjusted for laminar flow that reduced the erosion of fragile claystone formation in the wellbore. The revised SSBDF formulation at WPS-16 result in a significant reduction of hole enlargement to 3.2% in the claystone section through a combination of chemicals and mechanical inhibition that contribute improved hole cleaning. The addition of wellbore strengthening material also provide an effective seal to minimize gas invasion. This paper describes the field trials in the Gulf of Thailand drilled with revised sodium sodium silicate based drilling fluid, the use of wellbore strengthening materials to manage gas influxes, better drilling practice and hydraclic simulation concluded that high performance water based drilling fluid of this nature have wider application where oil-base drilling fluid have traditionally been used.

scholarly journals Migrating Engineering Windows HPC applications to Linux HTCondor and Slurm Clusters

2020 ◽  
Vol 245 ◽  
pp. 09016
Author(s):  
Maria Alandes Pradillo ◽  
Nils Høimyr ◽  
Pablo Llopis Sanmillan ◽  
Markus Tapani Jylhänkangas
Keyword(s):  
Message Passing ◽  
High Performance ◽  
Message Passing Interface ◽  
Technology Development ◽  
General Purpose ◽  
Low Latency ◽  
Technical Solution ◽  
Single Node ◽  
It Department ◽  
Linux Cluster

The CERN IT department has been maintaining different High Performance Computing (HPC) services over the past five years. While the bulk of computing facilities at CERN are running under Linux, a Windows cluster was dedicated for engineering simulations and analysis related to accelerator technology development. The Windows cluster consisted of machines with powerful CPUs, big memory, and a low-latency interconnect. The Linux cluster resources are accessible through HTCondor, and are used for general purpose parallel but single-node type jobs, providing computing power to the CERN experiments and departments for tasks such as physics event reconstruction, data analysis, and simulation. For HPC workloads that require multi-node parallel environments for Message Passing Interface (MPI) based programs, there is another Linux-based HPC service that is comprised of several clusters running under the Slurm batch system, and consist of powerful hardware with low-latency interconnects. In 2018, it was decided to consolidate compute intensive jobs in Linux to make a better use of the existing resources. Moreover, this was also in line with CERN IT strategy to reduce its dependencies on Microsoft products. This paper focuses on the migration of Ansys [1], COMSOL [2] and CST [3] users from Windows HPC to Linux clusters. Ansys, COMSOL and CST are three engineering applications used at CERN for different domains, like multiphysics simulations and electromagnetic field problems. Users of these applications are in different departments, with different needs and levels of expertise. In most cases, the users have no prior knowledge of Linux. The paper will present the technical strategy to allow the engineering users to submit their simulations to the appropriate Linux cluster, depending on their simulation requirements. We also describe the technical solution to integrate their Windows workstations in order from them to be able to submit to Linux clusters. Finally, we discuss the challenges and lessons learnt during the migration.

High Performance Water Base Fluid Improves Wellbore Stability and Lowers Torque

2016 ◽  
Author(s):  
E. DeNinno ◽  
M. Molina ◽  
J. Shipman ◽  
H. Dearing ◽  
F. Arpini ◽  
...  
Keyword(s):  
Base Fluid ◽  
High Performance ◽  
Wellbore Stability ◽  
Water Base
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