Recuperação dimensional em camisa de assentamento de obturador FH por aspersão térmica, método de arco spray, em conjunto com solda

Abstract

This paper presents a new methodology for the dimensional recovery service and improvement of internal surface properties in entry jacket, a component of the FH hydraulic Packer. Usually the recovery of the entry jacket was carried out with thermal spray electric arc in almost 100% of its entire internal area, with the exception of the region which serves to protect the edges of the metallization, called anchorage. It also presents a solution to the seal failure, which results in the passage of internal well fluids into the internal of the entry jacket of FH hydraulic Packer, preventing its operation. To remedy the seal failure, tests were performed in nesting shirt, based on its internal dimensional recovery and increasing the extent of the anchorage. The anchorage previously had a dimension of 3mm from the external phase of the component, on both sides. The proposed solution was to increase the extent of anchorage in the region of the seal´s interface, the settlement shirt and sealing ring by applying overlay. The anchorage recovered with welding started having the length of 35mm each side from the outer face of the settlement shirt, on both sides, thus improving the mechanical characteristics in the region of this interface, as this is to be a deposit with molten metal characteristics, unlike the deposits applied by plating layers of which are liquid droplets which solidify, resulting in a laminated microporous macrostructure, micro cavities, etc.