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How to assess corrosion with reliability-based criteria

Thursday, February 14, 2019

Examples of burst and leak event in pipelines.

Reliability-based Limit State Design and assessment corrosion criteria have been developed as part of a joint industry project to optimize corrosion mitigation for vintage pipelines. The criteria is calibrated to meet specific reliability targets within a certain tolerance but does not require probabilistic calculations for application. Comparison of the criteria to the CSA Z662 and TransCanada’s in-house reliability-based criteria was undertaken to evaluate the performance of the criteria.  

Dr. Dongliang Lu is presenting the results of this project at the upcoming Pipeline Pigging and...

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How to evaluate and verify external leak detection systems

Thursday, February 14, 2019

Schematic Representations of Operating Areas 1 and 2

A leak detection evaluation framework for onshore transmission pipelines has been developed in conjunction with PHMSA. The framework is to be used by pipeline operators to evaluate and verify leak detection systems that operate external to the pipeline, specifically those with the ability to detect small leaks.

In addition to developing the framework, we have shown how the developed framework can be used through a demonstration exercise, which involved assessing the ability of candidate technologies to meet specific performance requirements.

Mr. Mathew Bussière is presenting the results of...

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Unconventional Well Applications
paula.kreba Fri, 11/23/2018 - 14:34
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Seminar Announcement: Colorado School of Mines

Unconventional well applications present several challenges for artificial lift. The rapid production decline usually makes it necessary for operators to change the lift system after certain time, and minimizing the costs associated with these changes is paramount.

The deep, long horizontal well configuration also creates additional difficulties. Landing a downhole pump deep in the well, to achieve higher drawdowns, may be associated with higher failure rates, due to the additional loads on the pumping system equipment through the deviated sections.

The well often produces in slugs, which is...

Course Announcement: PCP System Design and Performance Optimization Course including PC-PUMP® Software Training - Bogota, Colombia
paula.kreba Wed, 10/31/2018 - 13:17
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Diseño y Optimización de Sistemas de Bombeo por Cavidades Progresivas (BCPs)

C-FER estará dictando el Curso de “Diseño y Optimización de Sistemas de Bombeo por Cavidades Progresivas (BCPs)” incluyendo entrenamiento en el software PC-PUMP®. Del 19 al 23 de Noviembre de 2018, en Bogotá, Colombia.

Para información de costos e inscripción, visite Eventbrite: https://www.eventbrite.ca/e/pcp-system-design-and-performance-optimization-course-including-pc-pump-software-training-bogota-registration-46332385412




C-FER is holding course on "PCP System Design and Performance Optimization including PC-PUMP® Software Training" on November 19-23, 2018 in Bogota,...

Workshop Announcement: Geothermal Well Design & Integrity for Geothermal Applications
admin Tue, 09/25/2018 - 16:21
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An overview of the considerations, key factors, industry guidelines and practices, examples, and field experience related to the design and integrity of geothermal wells

C-FER Technologies is holding a workshop on “Thermal Well Design & Integrity for Geothermal Applications” at the Peppermill Resort Spa Casino, in Reno, Nevada on Thursday, October 18, 2018 from 8 am – 5 pm.

The workshop is immediately after the 42nd GRC Annual Meeting & Expo. If you are attending the meeting, visit us at booth 320 & 322.

Pricing: register by September 30, 2018 for $685 CAD; after September 30, 2018 for $815 CAD.

Register now through Eventbrite

How to perform quantitative risk analysis for transmission pipelines

Friday, September 21, 2018

Framework for the Quantitative Risk Analysis Process

Quantitative risk analyses are used in the pipeline industry to identify high-risk locations and main contributing threats; to evaluate risk against an acceptance criterion; to evaluate changes in risk over time; to guide integrity management decisions; and to demonstrate regulatory compliance.

We developed for the U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration (PHMSA) guidelines for the development and application of pipeline quantitative risk analysis models for natural gas and hazardous liquids transmission pipelines. The purpose of these guidelines...

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How to improve corrosion assessment using reliability-based criteria

Thursday, September 20, 2018

Illustration of the probability of failure as a function of time for a corrosion feature

Corrosion assessment criteria in current standards for onshore transmission pipelines rely on safety factors that are experience-based, with their implication on the risk or safety level associated with the pipeline unknown.

Working as part of a joint industry project, we have developed reliability-based corrosion assessment criteria in a deterministic format that are calibrated to achieve a specified safety level. The main features of the criteria are:

  • Inclusion of calibrated safety factors and input parameters that result in intended reliability levels within a specified tolerance
  • Considera...
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How to apply limit states design rules for geotechnical loads

Wednesday, September 19, 2018

Using a structural reliability-based approach to develop the strain demand and strain capacity parameters

A limit states design approach for onshore pipelines has been developed with reliability-based design rules for geotechnical loads. In consideration of the modelling complexity of the soil movement mechanisms and pipe-soil interaction, and to allow for flexibility to incorporate future model developments, the design rule formation is directly based on the distribution parameters of the strain demand and capacity of the pipeline.

Working as part of a joint industry project, we used the structural reliability-based approach to develop the strain demand and strain capacity parameters required to...

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How to analyze angled cracks in spirally welded pipelines

Monday, September 17, 2018

Example of Spiral Pipe Manufacturing

Spirally welded pipelines (extensively used in liquid transmission pipeline systems) may contain manufacturing anomalies that are susceptible to fatigue growth. To account for the angle of these cracks with respect to the longitudinal pipe axis, modifications to inputs of crack assessment models are required.

Using the widely-used pipeline assessment model CorLAS®, we worked with Enbridge Pipelines to investigate two input modifications:

  • Consideration of the normal stress component perpendicular to the angled crack, for which we developed a stress transformation calculator
  • Using an effective...
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Does feature length growth affect predicted burst pressure in pipelines?

Monday, September 17, 2018

Effect of defect length growth on probability and mode of pipeline failure

The pipeline industry has established various methodologies to estimate corrosion growth in pipelines. However, growth of corrosion feature length is inconsistently addressed in these methods.

We worked with Enbridge Pipelines to review these methodologies and determine the impact of feature length on corrosion burst pressure predictions.

This review:

  • Considered methodologies that are applicable to both feature lengths and depths
  • Evaluated the methodologies’ abilities to identify unsafe defects using estimated burst pressure from repeated in-line inspections
  • Compared findings with feature...
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