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Keywords: preload
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Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2024
Paper Number: OTC-35491-MS
... installation and operations offshore technology conference hpht houston hpht development application information conductor hanger complex reservoir operation texas drilling operation mudline chevron wellhead anchor preload intervention Introduction The Anchor field was discovered...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 2–5, 2022
Paper Number: OTC-31714-MS
... (FEA) results. The satisfactory correlation between numerical methods and physical tests provides reliability in design and validation method to develop and qualify subsea flowline connection systems. subsea system lrfd factor contact pressure preload connection system external load strain...
Proceedings Papers

Paper presented at the Offshore Technology Conference, August 16–19, 2021
Paper Number: OTC-31051-MS
.../unlock functionality, fracture based failure, mechanical disengagement, leakage and preload exceedance. These capacities are validated through full scale testing based on the requirements of API 17TR7 and API STD 17G with combined loading applied to the Normal, Extreme and Survival capacity curves...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2019
Paper Number: OTC-29308-MS
... either a reduction in the installation preload, an increase in bolt size, a reduction in the design load-carrying capacity, or a combination thereof. For this study, a reduction in the installation preload to reduce the tensile stress below the API Spec 17D allowable limit was selected as the corrective...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27591-MS
... procedure tensile stress drillstring design upstream oil & gas critical flaw flange eac resistance corrosion inhibition mean stress service life corrosion management drill pipe selection h2s management steel design procedure preload resistance fatigue life fracture initial...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2017
Paper Number: OTC-27820-MS
... subsea production equipment component stress nominal stress stress method bolt size maximum principal stress external load stress range subsea system upstream oil & gas piping simulation case 2 piping design stress concentration factor strength preload finite element analysis...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 2014
Paper Number: OTC-25163-MS
... together with the high and low pressure wellhead housings and conductor string, and simulates various load combinations including preload, internal pressure, external bending, and axial loads. The objective is to verify the system performance capacity envelopes using advanced FEA, and validate them...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 2013
Paper Number: OTC-23977-MS
..., perhaps non linearly, as water depths have continued to increase over the last 20 years. Also operating pressures and temperatures have increased, particularly in the last 10 years, with the focus on presalt and subsalt reservoirs. mandrel contact stress design approach preload steel...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2006
Paper Number: OTC-18268-MS
... installation drilling equipment preload prediction operation undrained shear strength upstream oil & gas platform design starboard leg soil condition final penetration spudcan tip penetration subsea system jackup strength rapid penetration leg location load level...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 2000
Paper Number: OTC-12080-MS
... Abstract The authors address economic impact of quality and availability of site soil information on safe jackup installation. Preload operations based on sufficient and on limited (or insufficient) soil data are analyzed. Reliability and applicability of a variety of soil information sources...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 5–8, 1997
Paper Number: OTC-8574-MS
... slender profile requirement necessitates the need for an internal connection system which generates enough extra lock force (preload) to prevent seal separation. An extensive 2D finite element analysis program was undertaken to model and optimize connector parts and estimate the amount of preload needed...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 3–6, 1993
Paper Number: OTC-7303-MS
... and dense sands are compared with the empirical relationships derived from single-leg test results [6, 7]. loading moment-rotation response preload rotational modulus spud 2 upstream oil & gas stiffness moduli otc 7303 spud osborne fixity equation kpa secant fixity preload stress...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6516-MS
... followed by a brief discussion of the principles of centrifuge modeling. stiffness horizontal load subsea system foundation behavior preload spud rotational restraint drum centrifuge drilling equipment specimen footing upstream oil & gas technology conference vertical load loading...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6708-MS
... ABSTRACT Deflection and pressure integrity behaviors are described for the Type VX 15,000 psi service subsea wellhead gasket; loading renditions considered include preload, cyclic pressure, and combined pressure and bending moment. This information has been generated by a combination of direct...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6779-MS
... ABSTRACT In this paper, the results of finite element analyses of API BX swivel flanges are presented. The interactions between the flange, the gasket, and the bolt preload are studied and illustrated. Two analytical approaches are explained, one with gasket in the model and the other without...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6775-MS
... rapid makeup engagement make use makeup tool rotation preload tendon section coupling tendon joint thread start connector conductor tendon pipe metal-to-metal seal otc 6775 installation tendon configuration OTC 6775 Rapid Makeup Coupled Tendon Connection J.W. Pallini Jr. and L.J...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6776-MS
... ranges within a certain nominal size. This would ease any interface problems with BOP stacks. A decision was made to design and prototype test the following sizes: 13-5/8", 15,000 psi and 21-1/4", 5,000 psi. diameter specification offshore drilling preload makeup time flange connection...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 6–9, 1991
Paper Number: OTC-6777-MS
... ABSTRACT A novel system has been designed to lock down and preload the high pressure housing of a subsea wellhead system into the structural conductor housing, ensuring efficient transfer of riser-induced loads. The system is entirely passive, preload being generated by string weight during...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 7–10, 1990
Paper Number: OTC-6468-MS
... ABSTRACT The behavior of a mat-supported mobile rig founded on very soft clay has been examined. The settlement of the mat into the clay during preload when setting up on the location is used to arrive at the ultimate bearing capacity of the soil. Analyses are then made of the bearing pressure...
Proceedings Papers

Paper presented at the Offshore Technology Conference, May 1–4, 1989
Paper Number: OTC-6129-MS
... the lower plate in Figure 7. is an elastomeric material. Elastomeric materials have low modulus or high strain per unit of stress relationship. The elastomeric characteristic of high strain or low modulus means that large changes in preload will not result in significant increases in the flow level. Assume...

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