SEALER FOR LONG FLUSH-JOINT PIPES (VARIANTS) Russian patent published in 2024 - IPC E21B33/03 

FIELD: oil and gas production.

SUBSTANCE: group of inventions is intended for use during technological operations and/or repair work in oil and gas wells using long flush-joint pipes. The sealer according to the first version contains a cylindrical body made with a through axial channel intended for the passage of pipes lowered into the well. The sealer is also equipped with an upper hollow guide located in the housing, rigidly fixed in the housing, and a lower hollow guide that is able to move. In addition, the sealer contains a hollow piston connected to a hydraulic channel to the pipe clamp, configured to move the lower guide, and a sealing element located between the lower and upper guides for the purpose of sealing the space between the pipe and the additional hollow piston. In this case, an additional hollow piston is connected to a hydraulic channel for opening or closing the piston in order to replace the sealing element. The sealer according to the second version is equipped with an additional upper hollow guide located in the housing, rigidly fixed in the coupling, as well as a lower hollow guide, that is able to move. In addition, the sealer is equipped with an additional hollow piston connected to a hydraulic channel to the pipe clamp, configured to move the corresponding lower guide, and an additional sealing element located between the corresponding lower and upper guides in order to seal the space.

EFFECT: increasing the durability of the sealer structure.

7 cl, 4 dwg