Production Tubing Leak Repair Using Reinforced Thermoplastic Pipe

2021 ◽  
Author(s):  
Olalere Sunday Oloruntobi ◽  
Prasanna Kumar Chandran ◽  
M Azuan Abu Bakar ◽  
Nurul Nazmin Zulkarnain ◽  
Hasrizal A Rahman ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Cost Savings ◽  
Cost Effective ◽  
Internal Diameter ◽  
Hydrocarbon Recovery ◽  
Coiled Tubing ◽  
Well Integrity ◽  
Cost Effective Method ◽  
Integrity Management ◽  
Corrosive Environments

Abstract Operators are faced with never-ending well integrity issues relating to tubing leaks. This situation is particularly important in oil and gas wells that are producing in corrosive environments. When a well can no longer be safely produced due to well integrity issues relating to tubing leaks, an expensive workover is often performed to restore the tubing integrity. To improve the economics of a well intervention involving tubing leak repairs, a new cost-effective method is being proposed. The novel technology involves the installation of reinforced thermoplastic pipe (RTP) inside the existing tubing to isolate multiple leaks using a coiled tubing unit or an E-line. The RTP is engineered for downhole applications with custom designed connectors and accessories. It is designed to handle corrosive fluids (CO2 and H2S) and prevent downhole erosion caused by sand production. The RTP can be used to eliminate tubing – annulus communication in both producers and injectors with full compliance to well integrity management system. The results of the field trial in a gas injector well in Malaysia basin show that the RTP can provide a reliable means of restoring and enhancing the production of oil and gas with considerable cost savings (up to 80% cost reduction when compared to a conventional workover). In most cases, the high cost associated with a conventional workover can make it uneconomical when compared to the expected hydrocarbon recovery from the well, resulting in production deferment (well shut-in). The RTP can significantly increase the viability of repairing a larger percentage of the wells that are shut-in due to the loss of tubing integrity when the hydrocarbon recovery from the well is insufficient to justify a full workover. The significant cost savings provided by the RTP would dramatically improve economics and would likely result in more reserves recovered. The RTP also has a smoother surface that contributes to minimum friction and reduces the risk of scales formation when compared to the steel tubing of the same internal diameter.

Towards Implementing Condition-Based Maintenance (CBM) Policy for Offshore Blowout Preventer (BOP) System

2019 ◽  
Author(s):  
Tobiloba Elusakin ◽  
Mahmood Shafiee ◽  
Tosin Adedipe
Keyword(s):  
Oil And Gas ◽  
Cost Savings ◽  
Oil And Gas Industry ◽  
Condition Based Maintenance ◽  
Gas Industry ◽  
Training Requirements ◽  
Blowout Preventer ◽  
Integrity Management ◽  
Maintenance Personnel ◽  
Oil And Gas Companies

Abstract With the steadily growing demand for energy in the world, oil and gas companies are finding themselves facing increasing capital and operating costs. To ensure the economic viability of investments and improve the safety of operations, oil and gas companies are promoting their asset integrity management (AIM) systems. In the past, the oil and gas industry adopted reactive maintenance regimes, which involved recertification, testing and repair of faulty equipment while trying to achieve minimum downtime. As technology becomes more affordable, operators have been able to carry out improved fault diagnosis, prognosis and maintenance optimisation. As a result of this, condition-based maintenance (CBM) is being adopted more and more as the preeminent maintenance regime for oil and gas equipment. The blowout preventer (BOP) is one of the most expensive and safety critical drilling equipment in the oil and gas industry. However, there have been very few studies and best practices about how to develop a CBM policy and what specific monitoring techniques and devices will be required to implement it for the BOP system. This paper proposes a V-model based architecture for designing a CBM policy in BOP systems. As a result of the model proposed, gaps in implementation are identified and all the hardware, software and training requirements for implementing the CBM solution in BOP systems will be outlined in detail. Our proposed CBM framework will help BOP operators and maintenance personnel make cost savings through less repairs and replacements and minimal downtime.

Enabling Safe and Efficient Well Plug & Abandonments Through Use of Rigless Technologies

2021 ◽  
Author(s):  
Oleksandr Spuskanyuk ◽  
David C Haeberle ◽  
Brandon Max Baumert ◽  
Brian Matthew King ◽  
Benjamin T Hillier
Keyword(s):  
Case Studies ◽  
Low Cost ◽  
Cost Savings ◽  
Design Stage ◽  
Regulatory Requirements ◽  
Significant Cost ◽  
Coiled Tubing ◽  
Well Integrity ◽  
Cost Efficient ◽  
Well Abandonment

Abstract The growing number of upcoming well abandonments has become an important driver to seek efficiencies in optimizing abandonment costs while establishing long term well integrity and complying with local regulatory requirements. With an increasing global inventory of Plug and Abandonment (P&A) candidates, Exxonmobil has been driven to look for the most reliable, safe, and cost-efficient P&A technologies. ExxonMobil's P&A guidelines are consistent with and often more stringent than the local regulatory requirements but are also achievable, at least in part, with rigless technologies, leading to a more cost-efficient approach while ensuring well integrity. The objective of this paper is to demonstrate the success of rigless abandonments and their benefits compared to rig-based solutions. When developing a well abandonment plan, it is essential to consider a number of factors. These include local regulations, identification of zones to be isolated and suitable caprocks, and recognition of constraints including well history, conditions and uncertainties. Teams should begin with low cost operations without a rig if possible, estimate costs and effectiveness to achieve the barrier requirements, and evaluate batch operation opportunities for multi-well programs. ExxonMobil case studies are shown to help describe in detail how to make decisions about applicability of rigless abandonment options and how to properly execute such abandonments to achieve compliance with the barrier requirements. It has been demonstrated that significant cost savings can be achieved by staging the abandonment program in a way that lower cost technologies are utilized during the early stages of well abandonment, starting with wireline where possible, followed by coiled tubing and finally by a pulling unit, as appropriate. P&A execution could be achieved without a rig in a majority of cases, including most offshore wells, with the need to use a rig only in special circumstances or phases of execution. It is important to note that the barrier placement and safety of rigless P&A execution will not be compromised, as compared to the rig-based P&As. Additional cost savings could be achieved by further optimizing P&A design at the well design stage, ensuring that there are no built-in limiters that would prevent rigless P&A execution at the end of well life. Several case studies from ExxonMobil's global offshore experience demonstrate the feasibility and effectiveness of rigless P&A operations, with significant cost savings compared to rig-based P&As. It has been evident that rigless P&A choice is applicable to the variety of ExxonMobil's P&A projects of different complexities, with the same or superior quality of abandonment and safety record.

Lessons Learned from the First Chemical Sand Consolidation in Zawtika Field

2021 ◽  
Author(s):  
Wiwat Wiwatanapataphee ◽  
Thanita Kiatrabile ◽  
Pipat Lilaprathuang ◽  
Noppanan Nopsiri ◽  
Panyawadee Kritsanamontri
Keyword(s):  
Control Method ◽  
Cost Effective ◽  
Lessons Learned ◽  
Candidate Selection ◽  
High Rate ◽  
Operation Performance ◽  
Coiled Tubing ◽  
Cost Effective Method ◽  
Sand Control ◽  
Gravel Pack

Abstract The conventional gravel pack sand control completion (High Rate Water Pack / Extension Pack) was the primary sand control method for PTTEPI, Myanmar Zawtika field since 2014 for more than 80 wells. Although the completion cost of gravel pack sand control was dramatically reduced around 75 percent due to the operation performance improvement along 5 years, the further cost reduction still mandatory to make the future development phase feasible. In order to tackle the well economy challenge, several alternative sand control completion designs were reviewed with the existing Zawtika subsurface information. The Chemical Sand Consolidation (CSC) or resin which is cost-effective method to control the sand production with injected chemicals is selected to be tested in 3 candidate wells. Therefore, the first trial campaign of CSC was performed with the Coiled Tubing Unit (CTU) in March to May 2019 with positive campaign results. The operation program and lesson learned were captured in this paper for future improvement in term of well candidate selection, operation planning and execution. The three monobore completion wells were treated with the CSC. The results positively showed that the higher sand-free rates can be achieved. The operation steps consist of 1) Perform sand cleanout to existing perforation interval or perforate the new formation interval. 2) Pumping pre-flush chemical to conditioning the formation to accept the resin 3) Pumping resin to coating on formation grain sand 4) Pumping the post-flush chemical to remove an excess resin from sand 5) Shut in the well to wait for resin curing before open back to production. However, throughout the campaign, there were several lessons learned, which will be required for future cost and time optimization. In operational view, the proper candidate selection shall avoid operational difficulties e.g. available rathole. As well, detailed operation plan and job design will result in effective CSC jobs. For instance, the coil tubing packer is suggested for better resin placement in the formation. Moreover, accommodation arrangement (either barge or additional vessel) and logistics management still have room for improvement. These 3 wells are the evidences of the successful applications in Zawtika field. With good planning, lesson learned and further optimization, this CSC method can be beneficial for existing monobore wells, which required sand control and also will be the alternative sand control method for upcoming development phases. This CSC will be able to increase project economic and also unlock the marginal reservoirs those will not justify the higher cost of conventional gravel pack.

scholarly journals The Economic Impact of Weight Regain

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Caroline E. Sheppard ◽  
Erica L. W. Lester ◽  
Anderson W. Chuck ◽  
Daniel W. Birch ◽  
Shahzeer Karmali ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Economic Impact ◽  
Weight Regain ◽  
Cost Savings ◽  
Cost Effective ◽  
Median Percentage ◽  
Weight Recidivism ◽  
Cost Effective Method ◽  
Significant Deficit ◽  
The Cost

Background. Obesity is well known for being associated with significant economic repercussions. Bariatric surgery is the only evidence-based solution to this problem as well as a cost-effective method of addressing the concern. Numerous authors have calculated the cost effectiveness and cost savings of bariatric surgery; however, to date the economic impact of weight regain as a component of overall cost has not been addressed.Methods. The literature search was conducted to elucidate the direct costs of obesity and primary bariatric surgery, the rate of weight recidivism and surgical revision, and any costs therein.Results. The quoted cost of obesity in Canada was $2.0 billion–$6.7 billion in 2013 CAD. The median percentage of bariatric procedures that fail due to weight gain or insufficient weight loss is 20% (average:21.1%±10.1%, range: 5.2–39,n=10). Revision of primary surgeries on average ranges from 2.5% to 18.4%, and depending on the procedure accounts for an additional cost between $14,000 and $50,000 USD per patient.Discussion. There was a significant deficit of the literature pertaining to the cost of revision surgery as compared with primary bariatric surgery. As such, the cycle of weight recidivism and bariatric revisions has not as of yet been introduced into any previous cost analysis of bariatric surgery.

scholarly journals Well Integrity Management: A Recommendation for Indonesia's Well Life Cycle

2021 ◽  
Vol 10 (1) ◽  
pp. 52-62
Author(s):  
Ganesha R Darmawan
Keyword(s):  
Life Cycle ◽  
Oil And Gas ◽  
Gas Field ◽  
Well Production ◽  
Well Integrity ◽  
The People ◽  
Oil And Gas Field ◽  
Integrity Management ◽  
The Government ◽  
Integrity Assurance

Indonesia oil and gas field mostly are brownfields which were drilled in the late '40s up to '90s. Development and further development of a new structure throughout the years is done, including drilling exploration wells with new play and development wells. Now, most well locations become a populated village and might raise the potential risk to the people and environment. To fulfil safety commitment, well production operations have to be done safely to the people and environment. Currently, there are no specific data that has registered all the wells in Indonesia. This issue is critical for Government and the operating companies to prepare for abandonment waves to prevent methane emissions from abandoned wells. Well Integrity Management, including well registering/database, reporting, risk assessment of trouble wells, and way forward for all the wells, should be initiated by the Government to ensure integrity assurance. It aims to prevent unwanted event in the future, including when the well is permanently abandoned. This paper will present literature studies about international well integrity standards and how well integrity manages the well life cycle. This paper is also providing recommendation to implement Well Integrity Management in Indonesia to ensure end to end well register.

Qualification Testing of Mechanical Pipe Joining Method

2014 ◽  
Author(s):  
Dave McColl ◽  
Adam Whiting
Keyword(s):  
Oil And Gas ◽  
Cost Effective ◽  
Operating Conditions ◽  
Performance Criteria ◽  
Innovative Technology ◽  
Pipeline System ◽  
Internal Corrosion ◽  
Regulatory Standards ◽  
Cost Effective Method ◽  
Pipeline Failures

Pipeline infrastructure is the backbone of the energy industry and remains the safest and most cost effective method for transporting oil and gas. For decades corrosion has presented a significant challenge to pipeline operators. According to Alberta Energy Regulator data, internal corrosion is considered to be the root cause for more than 54% of all documented pipeline failures in Alberta [1]. Spoolable composite pipeline technologies have become a mainstream corrosion solution over the last 10 years, however these products are limited to smaller pipelines, typically less than 6 inches in diameter. Traditional slip-lining (field installed plastic lined steel pipe) is used for internal corrosion protection of larger pipelines, however it is costly, requiring labour intensive field construction, often completed in inhospitable environmental conditions. As a result project delays and cost over-runs are commonplace. Recognizing the need for a cost effective pipeline corrosion solution for larger gathering pipelines, an innovative technology was developed that combines a unique mechanical pipe joining system with an integrated electro-fusion coupler. The new joining system enables insertion of an HDPE liner in a factory environment where costs and quality can be tightly controlled. The new joining system eliminates conventional welding of the pipeline in the field and instead uses a custom field press to quickly energize the mechanical pipe joint. Field scope is significantly reduced, construction completed in less time, and associated costs greatly reduced. This paper discusses the testing completed to qualify the new joining system for use in oilfield gathering pipelines. The qualification test plan includes all requirements identified in applicable regulatory standards (primarily CSA Z662-11), and prudent engineering requirements based on anticipated field handling and anticipated operating conditions. The test regime was ultimately designed to ensure the suitability of the pipeline system for intended service. Testing included hydrostatic burst, static gas pressure, bend, cyclic pressure and thermal, vacuum, tensile, and compressive tests on the joint. The test results show that in all cases the jointing system successfully met the established design performance criteria and in most cases exceeded the actual mechanical properties of the parent pipe, thus proving the joining system ready for field installations.

scholarly journals Straight to colonoscopy: the ideal patient pathway for the 2-week suspected cancer referrals?

2011 ◽  
Vol 93 (2) ◽  
pp. 114-119 ◽  
Author(s):  
Andrew D Beggs ◽  
Ravinda D Bhate ◽  
Shashi Irukulla ◽  
Mayen Achiek ◽  
A Muti Abulafi
Keyword(s):  
Demographic Data ◽  
Waiting Times ◽  
Cost Savings ◽  
Cost Effective ◽  
Patient Pathway ◽  
Retrospective Audit ◽  
Cost Effective Method ◽  
The Uk ◽  
The Cost ◽  
The Ideal

INTRODUCTION The UK has a higher mortality for colon cancer than the European average. The UK Government introduced a 2-week referral target for patients with colorectal symptoms meeting certain criteria and 62-day target for the delivery of treatment from the date of referral for those patients diagnosed with cancer. Hospitals are expected to meet 100% and 95% of these targets, respectively; therefore, an efficient and effective patient pathway is required to deliver diagnosis and treatment within this period. It is suggested that ‘straight-to-test’ will help this process and we have examined our implementation of ‘straight-to-colonoscopy’ as a method of achieving this aim. PATIENTS AND METHODS We carried out a retrospective audit of 317 patients referred under the 2-week rule over a 1-year period between October 2004 and September 2005 and were eligible for ‘straight-to-colonoscopy'. Demographic data, appropriateness of referral and colonoscopy findings were obtained. The cost effectiveness and impact on waiting period were also analysed. RESULTS A total of 317 patients were seen within 2 weeks. Cancer was found in 23 patients and all were treated within 62 days. Forty-four patients were determined by the specialist to have been referred inappropriately because they did not meet NICE referral guidelines. No cancer was found in any of the inappropriate referrals. The use of straight-to-test colonoscopy lead to cost savings of £26,176 (£82.57/patient) in this group compared to standard practice. There was no increase in waiting times. CONCLUSIONS Straight-to-colonoscopy for urgent suspected cancer referrals is a safe, feasible and cost-effective method for delivery of the 62-day target and did not lead to increase in the endoscopy waiting list.

Disposal Wells Integrity Management- Real Time Annulus Pressure Monitoring Through GSM Connectivity to Enhance Well Integrity

2021 ◽  
Author(s):  
Babar Mohamed Saleem ◽  
Janardhanan Kunissery Puliyakotte ◽  
Abullais Ullalil Mundeth ◽  
Diaa Mohamed Yasein ◽  
Mohammed Ali Al-Muri ◽  
...  
Keyword(s):  
Continuous Monitoring ◽  
Oil And Gas ◽  
Oil Fields ◽  
Wireless Technology ◽  
Pressure Monitoring ◽  
Well Integrity ◽  
Modern Age ◽  
Integrity Management ◽  
Manual Methods ◽  
Water Disposal

Abstract ADNOC BAB Field has 11 water disposal wells, which are currently being monitored manually. The paper is about the implementation of remote annulus pressure monitoring for water disposal wells. The manual methods of monitoring remote annulis pressure comes in with inherent disadvantages like no continuous monitoring and deployment of our skilled resources for the same. The paper throws light on the present issues faced while using the manual monitoring and how it has been covered when the proposed wireless technology is implemented. Also the paper illustrates, the savings in terms of man power and resources and relevance of the technology to the modern age oil and gas upstream industry considering the scalablity to more number of wells in vast oil fields.

Efficacious Use of Simple and Cost Effective Acoustic Flow Analyzer Measurement to Enhance Recovery and Improve Life Cycle of Wells

2016 ◽  
Author(s):  
Omar Alaref ◽  
Mahmoud Saada ◽  
Mongi Abdelmoula ◽  
Marvin Rourke
Keyword(s):  
Data Acquisition ◽  
Oil And Gas ◽  
Cost Effective ◽  
Oil And Gas Industry ◽  
Leak Detection ◽  
Corrosion Monitoring ◽  
Gas Industry ◽  
Well Integrity ◽  
The World ◽  
Scale Down

ABSTRACT Well integrity technologies have been in high demand within the oil and gas industry in the recent years due to two main reasons; Recent incidents and down term in industry. The recent failures and blow out incidents occurring in different parts of the world encouraged new strategies and well integrity management systems to be deployed in order to ensure wells are meeting health, safety and environmental standards. Moreover, the down term in industry caused by relatively low oil price which led oil and gas operators to scale down on exploration and drilling and alternatively work-over existing wells. It is believed that the most economical way to work-over the well is by performing data acquisition first, which enables the work-over team to do an informed decision and tackle the specified problem, saving non-productive time. One of the fast growing well integrity technologies is leak detection. Unlike conventional data acquisition techniques such as corrosion monitoring, leak detection method traces the fluids entering to the well-bore and gives a dynamic image of what's going on in a producing/injecting well. The leak detection is mainly based on passive acoustic measurement, which is typically based on listening to fluid vibration by moving through different aperture sizes, and recorded in different frequencies and amplitudes. Other measurements are recommended to add such as temperature, pressure and multiphase sensors (in case leak is suspected to be inside the tubing). The technology has been used in various locations around the world with challenging environments. The typical and most desired ones are firstly the surface casing leaks where fluids of various types enter into the annuli between casings and build up on surface. Moreover, high amounts of undesired fluids contributing to the production and the source would be hard to identify with conventional technologies.

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