The influence of rubber material on sealing performance of packing element in compression packer

Hu, Gang; Zhang, Peng; Wang, Guorong; Zhang, Min; Li, Ming

doi:10.1016/j.jngse.2016.12.027

Cited by 67 publications

(32 citation statements)

References 12 publications

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“…Based on the effect of friction shown in Figure 16, it can be inferred that the peak contact pressure would subsequently decrease from the top seal element to the bottom seal element. This effect of friction has also been demonstrated previously by Ma et al [27] in simulations of dual rubber packer equipment.…”

Section: Practical Implicationssupporting

confidence: 83%

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Investigation of Elastomer Seal Energization: Implications for Conventional and Expandable Hanger Assembly

Patel

Salehi

2019

Energies

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Elastomer seals are extensively used in various wellhead and casing/liner hanger equipment as barriers for isolating fluids. Seal assemblies have been identified as one of the major cause of well control incidents. Majority of hangers utilize conventional weight- or mechanical-set slip-and-seal assembly. The objective of this paper is to conduct a detailed investigation of seal energization in conventional and relatively newer expandable type hanger seal assembly. To achieve the objective, the finite element modeling approach was employed. Three dimensional computer models consisting of concentric casings and annular elastomer seal element were constructed. Seal energization process was modelled by manipulating boundary conditions. Conventional seal energization was mimicked by applying rigid support at the bottom of elastomer element and compressing it from the top. Expandable hanger type seal energization was modelled by radially displacing the inner pipe to compress annular seal element. Seal quality was evaluated in terms of contact stress values and profile along the seal-pipe interface. Different amounts of seal energization were simulated. Both types of seal energization processes yielded different contact stress profiles. For the same amount of seal volumetric compression, contact stress profiles were compared. In case of conventional seal energization, contact stress profile decreases from the compression side towards support side. The seal in expandable hanger generates contact stress profile that peaks at the center of contact interface and reduces towards the ends. Convectional seal assembly has more moving parts, making it more prone to failure or under-energization. Finite Element Models were validated using analytical equations, and a good match was obtained. The majority of research related to elastomer seal is focused on material properties evaluation. Limited information is available in public domain on functional design and assessment of seal assembly. This paper adds novel information by providing detailed assessment of advantages and limitations of two different seal energization process. This opens doors for further research in functional failure modes in seal assembly.

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Section: Practical Implicationssupporting

confidence: 83%

“…Hu et al [27] conducted 3D finite element analysis of compression packer equipment. They studied the effect of carbon black content in HNBR formulation and ranked the materials in terms of contact stress, shoulder extrusion, and stresses in structure of the packer.…”

Section: Literature Reviewmentioning

confidence: 99%

Investigation of Elastomer Seal Energization: Implications for Conventional and Expandable Hanger Assembly

Patel

Salehi

2019

Energies

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“…Sealing force prediction of elastomeric seal material for PEM fuel cell under temperature cycling [32] Stress relaxation behaviour of EPDM seals in polymer electrolyte membrane fuel cell environment [33] Sealing force prediction of elastomeric seal material for PEM fuel cell under temperature cycling [34] Temperature-dependent leak tightness of elastomer seals after partial and rapid release of compression [35] Long-term stress relaxation prediction for elastomers using the time-temperature superposition method [36] Improvement of hardness and compression set properties of EPDM seals with alternating multilayered structure [37] Method for the evaluation of elastomeric seals by compression stress relaxation [38] The influence of rubber material on sealing performance of packing element in compression packer [39] Stress relaxation in viscoelastic materials [40] Improvement of hardness and compression set properties of EPDM seals with alternating multilayered structure [37] Extrusion, slide, and rupture of an elastomeric seal [41]…”

Section: Titlementioning

confidence: 99%

Design and Development of Weatherproof Seals for Prefabricated Construction: A Methodological Approach

Orlowski¹,

Shanaka²,

Mendis³

2018

Preprint

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Satisfactory weatherproofing of buildings is vital to maximise their design life and performance which requires the careful design of external sealing technologies. Systems commonly available have served well in conventional construction however with many prefabricated systems emerging in the building industry new and novel means of weatherproofing between panels and modules need to be developed purpose specific to this application. This paper presents a holistic and fundamental methodological approach to Design and Development of waterproof seals and has been applied specific for prefabricated panelised and modular systems. Two purpose specific weatherproof seals are finally presented. Flow charts of the overview of the suggested methodological approach and the processes within which include DfMA that have been incorporated into understanding and developing seals for this practical application. These strategies have enabled a resourceful and holistic set of processes that can be adapted and used for similar forms of product research in new and developing areas of construction such as prefabrication. The design and development process is thoroughly investigated and has resulted in an exploration of the technical challenges and potential solutions which take into consideration factors from installation limitations to building tolerances.

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“…In light of global economic development, the demand for petroleum resources and energy in various countries is increasing [1,2]. To solve the problem of imbalance between supply and demand, oil and gas pipelines have been built in large quantities owing to their economic and high efficiency in oil and gas transportation.…”

Section: Introductionmentioning

confidence: 99%

Risk Assessment System for Oil and Gas Pipelines Laid in One Ditch Based on Quantitative Risk Analysis

2019

Self Cite

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In view of the vegetation reduction caused by the continuous construction of oil and gaspipelines, the pipelines have been designed to be laid in one ditch to reduce land occupation.However, owing to the small spacing between the pipelines, the fault correlation between pipelineshas been proven to increase the potential hazard of adjacent pipelines and routing environments.The neglect of failure correlation in existing risk assessment methods leads to inaccurate results,which will lead to errors in maintenance decisions. Therefore, this paper proposed a riskassessment system for pipelines using this laying method. In the risk assessment, pipelines laid inone ditch (PLOD) were regarded as a series system relative to the routing environment. Therefore,the functional relationship between the total risk of the pipeline system and the risk of eachpipeline was obtained by combining the engineering system reliability theory with themathematical induction method. In addition, fuzzy set theory combined with fault tree analysiswas used to calculate the failure probability of each pipeline in the system. Event tree analysis wasused to sort out all the possible consequences of pipeline failure, and then the consequences wereunified into monetary units to evaluate the severity of failure consequences. Finally, the two partswere merged into a bow-tie diagram to realize the risk management and control of the pipeline.Meanwhile, risk acceptance criteria were formulated to analyze risks and to guide pipelinemaintenance. This system provides a complete risk assessment system for the pipeline system laidin one ditch, including the methods of risk identification, risk assessment, and risk analysis, whichare of great significance to ensure the safety of the pipeline and the surrounding environment usingthis laying method.

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The influence of rubber material on sealing performance of packing element in compression packer

Cited by 67 publications

References 12 publications

Investigation of Elastomer Seal Energization: Implications for Conventional and Expandable Hanger Assembly

Investigation of Elastomer Seal Energization: Implications for Conventional and Expandable Hanger Assembly

Design and Development of Weatherproof Seals for Prefabricated Construction: A Methodological Approach

Risk Assessment System for Oil and Gas Pipelines Laid in One Ditch Based on Quantitative Risk Analysis

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