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A failure mechanism as described in this database is a detailed description of a technical failure mode. Most failure mechanisms are physical degradation of components due to operational conditions combined with component features like design, materials and surface treatments. Other failure mechanisms are non-destructive.
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Materials are the building blocks for technology components. This database has emphasis on metal alloys and polymer compounds used for well technology. Emphasis is put on material ‘problems’ helping people to find good material candidates from a safety and reliability point of view.
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Surface treatments are used to improve the surface of a manufactured item. Reasons may be to improve corrosion protection, wear resistance and friction control. Surface treatments typically are removing material, adding material or chemically altering the surface.
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Operational conditions include environmental conditions and physical loads as experienced by the equipment during all life cycle phases. Functional failures with or without failure mechanisms can only be predicted and prevented if the operational conditions are known and understood prior to the design phase.
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Worst case load scenarios are events where the equipment is exposed to severe operational conditions. ExproBase describes worst case load scenarios related to the drilling and the operational lifecycle of the well itself. Worst case scenarios and not the single or individual operational loads are normally dimensional for well equipment.
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Human errors are incorrect performance of human actions. Humans are not made to do the right decisions in every case. Human errors can be divided into unintended- and intended human errors.
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Performance influencing factors (PIF’s) affects the human performance and thus humans ability to perform actions correct and efficient. Performance influencing factors can be divided into workplace related factors and human related factors.
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The drill string is the assembly used for making the hole in the ground. The drill string is normally made up of the sections; drill pipe, heavy weight drill pipe collars and bottom hole assembly.
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The main functions of the subsea BOP as a system are to keep the well fluid inside the well bore and displace and replace the well fluid to regain hydrostatic control
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This database describes specific well components related to casing, completion string, wellhead and Xmas tree to better understand how they work and typical problems related to these components.
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Interventions equipment are used for well maintenance.
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