Structural Sizing for EDP Valve Body for HPHT Wellhead

Abstract

The reduction in production from active oil wells in Brazil and the depletion of reservoirs have driven research into deep-sea reservoirs, especially on the Brazilian equatorial margin and in projects such as Sergipe-Águas- Profundas. This work aims to design an EDP valve for intervention in HPHT (High Pressure, High Temperature) offshore wells. API and ASME standards, in addition to technical literature, were used to define the appropriate material and mechanical properties, and to calculate allowable stresses, as well as the stresses acting on the body and its components, using stress criterion to ensure equipment integrity. Stress concentrations were applied in regions with geometric alterations, as these are more critical. Finite element analysis more accurately assessed the equipment's behavior under the established conditions. Both calculation models were within the allowable design limits and demonstrate that the extreme conditions of HPHT wells require a thorough analysis of the design parameters.