ANNULAR SEAL ATTACHMENT ASSEMBLY AND PROTECTIVE SLEEVE Russian patent published in 2020 - IPC E21B33/12 

FIELD: production of hydrocarbons.

SUBSTANCE: invention relates to underwater production of hydrocarbons. Annular seal and protective bushing attaching assembly comprises the end of the tripping tool and the end part of the annular seal or the protective bushing for connection to each other, collet fitted on the outer surface of the upper portion of the end portion of the hoisting tool in the annular recess and which is a body and fixing tabs with bulges on the ends, annular element having an internal threaded profile and an outer projection mounted on the lower portion of the end portion of the hoisting tool in the cavity formed by the annular seal or the bushing end part and the recess on the outer surface of the end portion of the hoisting tool, sliding bush located in groove made in annular element, shear elements arranged in sliding sleeve.

EFFECT: higher efficiency and reduced labor input during the operation of attachment of the protective bushing or annular seal to the hoisting tool, high technological effectiveness of the operation of disengagement of the protective bushing or annular seal from the hoisting tool, reduced costs due to the absence of the need to use an additional tool for removing and lifting the protective bushing or annular seal.

1 cl, 3 dwg