Total Depth Solutions' technologies provide effective, efficient and safe well construction method to mitigate borehole problems

2011 ◽  
Vol 51 (1) ◽  
pp. 459
Author(s):  
David Whitby ◽  
Budi Utama ◽  
Richard Reading
Keyword(s):  
Decision Making ◽  
Cost Effective ◽  
Economic Benefits ◽  
Hole Drilling ◽  
Decision Making Process ◽  
Drill Bit ◽  
Effective Surface ◽  
Running System ◽  
Fluid Losses ◽  
Productive Time

Permit TL/2 in the Carnarvon Basin, WA, presents several challenges for top hole drilling and casing running operations. Previous experience showed that drilling the 16” hole section and running 13⅜” casing was typically a time consuming phase of the well due to fluid losses and tight hole conditions, consequently requiring the use of seawater to drill, back reaming, wiper trips and occasional spotting of pills. The initial solution delivered to the operator as an alternative method to get 13⅜” casing to total depth (TD) was to employ a casing drill bit to ream the casing to bottom while also delivering an improved drill-out time. This would be coupled with a sophisticated, unique, reliable and simply operated top drive casing running system that was already installed on the rig. Reviewing the Weatherford Total Depth Solutions team’s systems with cost, time and capabilities analysis, the operator was certain that the application of a complete drilling with casing system (DwC™) would mitigate the known hole problems and yield a safe and more cost-effective surface hole operation, significantly reducing non-productive time (NPT). This paper reviews: the problems that were traditionally encountered during conventional surface hole drilling and casing running operations; the decision-making process that the operator followed prior to employing DwC technology; and, the hazard mitigation and economic benefits realised through a one-way trip to total depth of about 1,000 m TVDRT, which broke to date the longest Weatherford 13⅜” DwC interval globally by the service company and operator.

The First Multilateral Well in Eastern Siberia on the Separated Oil Reservoirs

2021 ◽  
Author(s):  
Ruslan Fanisovich Gataullin ◽  
Stanislav Evgen’evich Ter-Saakov ◽  
Evgenij Vladimirovich Nikulin ◽  
Dmitriy Pavlovich Stifeev ◽  
Alexey Vyacheslavovich Filatov
Keyword(s):  
Low Frequency ◽  
Cost Effective ◽  
Drill String ◽  
Hole Drilling ◽  
Drill Bit ◽  
Eastern Siberia ◽  
Water Contact ◽  
Bottom Hole ◽  
Drilling Technology ◽  
Equipment Failures

Abstract This article describes engineering and technology solutions developed to successfully construct unconventional and unique horizontal well at the field of Eastern Siberia targeted to two isolated formations with an option to shut-off top Botuobinsky horizon after gas breakthrough and produce oil from underlying Ulakhansky bed further on. As oil-water contact in the lower part of Ulakhansky horizon makes fracturing the well inexpedient, multi hole drilling technology was implemented enabling drainage of the reserves that are far from the main borehole. The main objective of this well is to deplete Botuobinsky horizon subsequently shutting it off and continuing to recover petroleum reserves from Ulakhansky pay zone. Constructing such well is cost-effective, as it requires drilling only one intermediate casing interval instead of two. Accumulated experience of drilling and completing multi hole wells was used to ensure successful well construction; also, geological and stratigraphic data as well as possible complications while drilling Botuobunsky and Ulakhansky formations were analyzed in-depth. The following appliances were selected to meet the objective: –Bottom-hole equipment enabling drilling abrasive formations under conditions of high vibrations;–Special line of drill bits to ensure high ROP and successful sidetracking without additional tripping;–RSS with 152.4 mm drill bit. The goal set by the operating company was achieved through multi-faceted approach to performing the task, efficient cooperation of engineering technical services and continuous monitoring of output data while drilling. All that combined delivered the results listed below: –Sidetracks were carried out in an open horizontal hole without cement plugs and additional tripping for drill bit or BHA.–Minimized bottom-hole equipment failures under condition of increased high-frequency vibrations from bit while drilling hard formations due to implementation of modular PDM with data-transmitting channel.–Minimized bottom-hole equipment failures under condition of increased low-frequency vibrations from drill string with Hard Bending due to improved BHA design and optimized drilling parameters selection.–Liner was effectively run to Botuobinsky and Ulakhansky reservoirs with an option to shut-off the former after depletion and gas breakthrough. This well is the first one targeted at two isolated formations in East Siberia.

scholarly journals Economic Comparison of Satellite, Plane and UAV-Acquired NDVI Images for Site-Specific Nitrogen Application: Observations from Italy

Agronomy ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2098
Author(s):  
Marco Sozzi ◽  
Ahmed Kayad ◽  
Stefano Gobbo ◽  
Alessia Cogato ◽  
Luigi Sartori ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Decision Making ◽  
Optical Properties ◽  
High Resolution ◽  
Economic Benefits ◽  
Decision Making Process ◽  
Variable Rate ◽  
Nitrogen Application ◽  
Sensing Platforms ◽  
Medium Resolution

Defining the most profitable remote sensing platforms is a difficult decision-making process, as it requires agronomic and economic considerations. In this paper, the price and profitability of three levels of remote sensing platforms were evaluated to define a decision-making process. Prices of satellite, plane and UAV-acquired vegetation indices were collected in Italy during 2020 and compared to the economic benefits resulting from variable rate nitrogen application, according to a bibliographic meta-analysis performed on grains. The quality comparison of these three technologies was performed considering the error propagation in the NDVI formula. The errors of the single bands were used to assess the optical properties of the sensors. Results showed that medium-resolution satellite data with good optical properties could be profitably used for variable rate nitrogen applications starting from 2.5 hectares, in case of medium resolution with good optical properties. High-resolution satellites with lower optical quality were profitable starting from 13.2 hectares, while very high-resolution satellites with good optical properties could be profitably used starting from 76.8 hectares. Plane-acquired images, which have good optical properties, were profitable starting from 66.4 hectares. Additionally, a reference model for satellite image price is proposed.

KALLISTO: cost effective and integrated optimization of the urban wastewater system Eindhoven

2012 ◽  
Vol 7 (2) ◽  
Author(s):  
S. R. Weijers ◽  
J. de Jonge ◽  
O. van Zanten ◽  
L. Benedetti ◽  
J. Langeveld ◽  
...  
Keyword(s):  
Decision Making ◽  
Water System ◽  
Cost Effective ◽  
Decision Making Process ◽  
Urban Water ◽  
Urban Wastewater ◽  
Urban Water System ◽  
Treatment Techniques ◽  
Project Strategy

The Kallisto project aims at finding cost effective sets of measures to meet the WFD derived goals for the river De Dommel. The project reasons from the both acute and long term impacts of the urban wastewater system on the quality and ecology of the river that are studied with an integral monitoring campaign in the wastewater system (WWTP and sewers) and river. By applying impact based RTC, the project aims at minimizing additional investments in infrastructure while meeting the requirements. Moreover, uncertainty is explicitly considered in the optimization and decision making process. The paper describes the overall project strategy, some preliminary results of modelling and monitoring of the components of the urban water system and the demonstration research for treatment techniques and the planned integration into optimization and decision making.

A Systematic Approach to Re-Using of Used or Out-of-Service Static Equipment

2016 ◽  
Author(s):  
Kaveh Ebrahimi
Keyword(s):  
Decision Making ◽  
Systematic Approach ◽  
Cost Effective ◽  
Life Extension ◽  
Decision Making Process ◽  
Correct Identification ◽  
End User ◽  
Hydrocarbon Production ◽  
Major Equipment ◽  
Extension Evaluation

The constant uncertainty within the hydrocarbon production and refining market coupled with the continued pressure to reduce greenhouse gas emissions and costs is increasing the need for operators of petroleum facilities to seek cost-effective ways of utilizing used or out-of-service equipment instead of installing new equipment. As an example, there may be equipment in parts of a refinery that have been out of service for a while, which the operator or end user would like to use in similar applications in the same refinery or other plants elsewhere. Once an operator decides to look at the possibility of re-using used or out-of-service equipment, a few important steps need to be taken to determine whether the equipment is still operable and suitable for its new intended service. As inspection, moving or relocating of major equipment within operating plants is usually possible only during planned turnarounds, the correct identification of necessary steps, prioritizing of tasks, and precise planning and coordination of activities to evaluate the condition of used or out-of-service equipment are critical to meet the usual tight deadlines of the decision making process. This article is structured primarily as an attempt to assist the organizations in charge of evaluation of used or out-of-service equipment to identify and plan the necessary steps in order to determine their suitability for their new intended service. Many of the issues discussed here can be also applied to any life extension evaluation program, and therefore throughout this report the term out-of-service is interchangeable with ‘used’ equipment. The focus of this article is mainly static equipment as re-using of machinery or rotating equipment would require a rather different approach [1]. Two case studies included at the end of this report demonstrate the benefits of adopting a systematic approach in evaluating used equipment.

A Public Choice Perspective on the Legalization of Casino Gaming

2016 ◽  
Vol 10 (2) ◽  
pp. 22-45
Author(s):  
Miao He ◽  
Ricardo C. S. Siu
Keyword(s):  
Decision Making ◽  
Public Choice ◽  
Choice Theory ◽  
Economic Benefits ◽  
Decision Making Process ◽  
Public Choice Theory ◽  
Policy Makers ◽  
The Public ◽  
Casino Gaming ◽  
Public Choice Perspective

The public choice theory is applied in this study to explore the effects of the expected economic benefits and cost of voters in the process of casino legalization. It is shown that in contrast to most voting processes, the emotional inclination of voters and the related changes have an explicit role in determining the decision made on a ballot for casino legalization. A model is therefore proposed based on the existing literature (for e.g., Morton, 1991; Olson, 1965; Riker and Ordeshook, 1968) to show the interactions and decision making process of related policy makers, and beneficiary and anti-gaming groups. The arguments are elaborated and verified by using evidence from New Jersey and Taiwan, where state-wide referendums were adopted as part of the legalization process of casino gaming.

scholarly journals Life Cycle Cost management of blower station construction for wastewater utility

2018 ◽  
Vol 170 ◽  
pp. 04021 ◽  
Author(s):  
Victor Bazhenov ◽  
Andrei Ustiuzhanin
Keyword(s):  
Decision Making ◽  
Life Cycle Cost ◽  
Cost Management ◽  
Power Saving ◽  
Cost Effective ◽  
Decision Making Process ◽  
Control Methods ◽  
Discount Rates ◽  
Economic Management ◽  
Support Decision Making

Management and Economics in construction is submitted by this article as a settlement tool for construction justification of blower stations. These buildings with powerful units are under financial provision of communal wastewater utilities. Economic management implemented by usage of LCC analyses, which supposed to support decision making process. LCC analyses refer to its application with and without consideration of discount rates (DR, DR-out, DR-with). Also investigated variants of blower types: multistage without control (v1), multistage with VFD control (v2), single stage dual vane control (v3). The result of LCC analysis (DR-out) shows, that last variant 3 is most cost-effective for investments with economy of: 26,9% to (v1) and 21,7% to (v2) under the identical duty conditions. Consideration of discount rates (DR-with) resulted the same as: 21,5% to (v1) and 19,7% to (v2). The power consumption plays a significant role in LCC estimation. The result of LCC analysis (DR-out) shows the proportion “energy/LCC”: 94,9% (v1); 87,1% (v2); 84,5% (v3). Consideration of discount rates (DR-with) resulted the same as: 92,5% (v1); 81,1% (v2); 76,6% (v3). The reached power saving for all control methods of blower regulation are inside range 14,3–34,9%.

Influencing the importance of health, partners, and hygiene among Zambian women

2017 ◽  
Vol 29 (3) ◽  
pp. 259-265 ◽  
Author(s):  
Violeta J Rodriguez ◽  
Maureen Chisembele ◽  
Deborah L Jones ◽  
Ryan Cook ◽  
Stephen M Weiss ◽  
...  
Keyword(s):  
Decision Making ◽  
Hiv Prevention ◽  
Bacterial Vaginosis ◽  
Cost Effective ◽  
Standard Of Care ◽  
Vaginal Flora ◽  
Decision Making Process ◽  
Intravaginal Practices ◽  
Hiv Acquisition ◽  
Over Time

Intravaginal practices (IVPs) are common in Zambia and are usually practiced for hygiene, partner pleasure, and health. IVPs are associated with HIV acquisition, changes in the vaginal flora, and bacterial vaginosis (BV), making it important to understand the decision-making process behind IVP engagement. The Women’s and Sexual Health (WASH) intervention decreased IVP engagement among HIV-infected Zambian women, though change in reasons for engagement has not been assessed. We used conjoint analysis (CA) to quantify the decision-making process of IVP engagement and evaluated how the WASH intervention impacted these factors. Participants were N = 84 women (37 ± 8 years old) randomized to WASH (n = 46) or standard of care plus (SOC+; n = 38) who completed demographic measures and a CA questionnaire at baseline, six months, and 12 months to quantify the importance placed on hygiene, partner pleasure, and health. The importance placed on health increased from baseline to six months (15.5 versus 25.1; p < 0.001) and from baseline to 12 months (15.5 versus 50.5; p < 0.001), and was higher in SOC+ at six months (19.9 versus 30.3; p = 0.003). Hygiene importance decreased from baseline (63.6) to six months (50.3), and from baseline to 12 months (26.1), and was higher in the experimental arm at six months (56.1) compared to SOC+ (44.6; p = 0.029). Importance placed on partner pleasure did not change over time in either group. Findings suggest that both groups exhibited an increase in the importance placed on health and a decrease on hygiene importance for IVP engagement, suggesting that SOC+ may be sufficient to promote attitude changes that may facilitate IVP discontinuation and may prove to be more cost effective by using fewer monetary resources. Findings highlight the potential of interventions to influence attitudes toward IVPs and provide novel avenues for research to improve the design and conduct of interventions aimed at reducing IVPs among Zambian women and contribute to HIV prevention efforts.

scholarly journals Economic Value of Meteorological Services to Switzerland’s Airlines: The Case of TAF at Zurich Airport

2014 ◽  
Vol 6 (2) ◽  
pp. 264-272 ◽  
Author(s):  
Stefan von Gruenigen ◽  
Saskia Willemse ◽  
Thomas Frei
Keyword(s):  
Decision Making ◽  
Economic Value ◽  
Economic Benefits ◽  
Transport Sector ◽  
Decision Making Process ◽  
Strategic Decisions ◽  
Service Areas ◽  
Domestic Airlines ◽  
Economic Need ◽  
Decision Making Model

AbstractJust as in other state-subsidized service areas, in the field of aviation weather there is political pressure as well as a growing economic need to substantiate or at least evaluate the economic benefits of meteorological information. The research presented in this paper has been conducted as part of a broad study concerning the economic benefits of the meteorological services in the Swiss transport sector. For the aviation sector, interviews revealed that meteorological information is a pivotal input factor in the decision-making process of airlines: In addition to security and safety purposes, airlines use meteorological information to optimize the economic efficiency of daily operations as well as for strategic decisions regarding flight routes and flight planning.In this paper a decision-making model is used to evaluate at least part of the economic benefits of the meteorological services to Switzerland’s domestic airlines by analyzing the use of terminal aerodrome forecasts (TAF) at Zurich Airport (Switzerland). By lowering the probability of costly wrong decisions, meteorological information generates direct economic benefits for the airlines. The total benefits for all domestic airlines at Zurich Airport amount to between 11 and 17 million Swiss francs per year [12 to 18 million USD; 1 U.S. dollars (USD) = 0.934 Swiss francs (CHF), average exchange rate 2012]. By extrapolating the results based on the number of flights, the total economic benefits of TAF to Switzerland’s domestic airlines at both main Swiss airports (Zurich and Geneva) add up to somewhere between 13 and 21 million Swiss francs per year (14 to 22 million USD).

scholarly journals Analytical Framework for Homeowner-Focused Computational Cost-Benefit Mitigation Decision Making

2021 ◽  
Vol 6 ◽  
Author(s):  
Fatemeh Orooji ◽  
Carol J. Friedland
Keyword(s):  
Decision Making ◽  
Hazard Mitigation ◽  
Cost Benefit ◽  
The United States ◽  
Economic Benefits ◽  
Decision Making Process ◽  
Economic Decision Making ◽  
Wind Hazard ◽  
Building Characteristics

As a result of increasing windstorm losses in the United States over the past 50 years, a variety of residential wind hazard mitigation strategies have been recommended. Wind hazard mitigation undoubtedly reduces windstorm losses; however, little customized information is available to support the economic decision-making process for individual stakeholders, especially at the consumer level. Therefore, there is a need for decision support tools to calculate, evaluate, and present the economic benefits of mitigation over variable decision-making time horizons for unique building characteristics in specific geographical locations. This paper presents a cost-benefit computational decision-making recommendation framework that evaluates and presents the cost effectiveness of mitigation, customized based on location, years of interest, and building characteristics. The decision-making framework consists of two cores. The user-independent core and user-dependent core which consists of eight steps, divided into four subprocesses: (1) data acquisition, (2) data evaluation, (3) cost-benefit calculation, and (4) results comparison and decision making. To demonstrate the framework, a wood-framed single-family home in light suburban terrain in Golden Meadow, Louisiana, is used as a case study, considering retrofit mitigation with a $15,000 budget and a decision-making time horizon of 30 years. The case study provides six mitigation options, with cost ranging between approximately $2,000 and $15,000 and net benefit/cost ratios ranging from 2.4 to 13. Once fully implemented in a decision making information tool, the developed mitigation recommendation framework will provide valuable information that can be used by home designers, builders, owners, and other stakeholders to better understand the economic facets of wind hazard mitigation, providing critical information as part of the overall decision-making process.

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