Development and Validation of a Modeling Technique for the Accurate Prediction of Heat-Up Times

ABSTRACT Accurate prediction of the time required for a heat treat load to reach the prescribed temperature will reduce variability and improve the quality of the heat treating process. A technique for these predictions, based on finite element models, was developed and validated....

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A Reliability Approach to the Design of OCTG Tubulars Against Collapse

ABSTRACT: In reviewing the current API 5C3 process for designing downhole tubulars against collapse under external pressure, it has been found that the API equations do not reflect a uniform 0.5% probability of failure as is commonly believed. By applying the API equations to an...

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Circumferential Stiffeners As Buckle Arrestors In Long Panels

ABSTRACT: It is well known that certain larger structures are susceptible to a type of collapse which starts locally but under favorable conditions can spread and has the potential of affecting the whole structure. The lowest load which can sustain this spreading of collapse...

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Riser Collapse Pressures Resulting from Release of Deepwater Mud Columns

ABSTRACT Emergency disconnect of a deepwater drilling riser filled with a heavy mud column creates the potential for collapse of the drilling riser. The concern for collapse is traditionally focused on the idea that the pressure equalization process at the bottom of the riser...

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Four Years’ Experience Using an Inconel Probe to Test the Cooling Characteristics of Production Quench Oil

ABSTRACT In the aircraft industry, heat treatment is performed that has to conform to several specifications and monitoring the performance of a quenchant is one aspect that must be taken into account. However, most of the accepted methods in these specifications, (i.e., Jominy...

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Localization and Propagation of Instabilities in Long Shallow Panels Under External Pressure

ABSTRACT: This paper discusses the response of long, shallow, elastic panels to uniform pressure loading. Under quasi-static conditions, the deformation of such panels is initially uniform along their length, and their response has the nonlinearity and instabilities characteristic of...

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Analysis and Design of Anti-Recoil System for Emergency Disconnect of a Deepwater Riser: Case Study

ABSTRACT Emergency disconnect of the drilling riser is required when a dynamically positioned deepwater floater has either a drift-off or a drive-off. This cannot be anticipated; therefore, the riser tension setting cannot be adjusted to a preferred value. Hence, following...

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Development of a Mud-Motor-Powered Coring Tool

ABSTRACT A new wireline retrievable mud motor powered coring tool has been developed. A significant aspect of this development project was a "design by analysis" approach whereby the performance of the tool was completely analyzed prior to performing the detailed mechanical...

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