CENTRATOR FOR ROTARY COLUMN Russian patent published in 2022 - IPC E21B17/10 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and can be used in production wells for centering the sucker rod string during rotation in tubing, relieving loads on the sucker rod string and is applicable to the installation of a screw rod pump with a ground drive. The centralizer for the rotary string contains the upper and lower cages, the lower and upper travel stops of the centralizer and the centering ribs with bends. Each of the clips consists of a split half-liner with annular protrusions along the outer diameter and a split half-shell. A protrusion is made along the inner diameter from the end of the split half-shells. The centering ribs at the end sections have folds made in the form of elastic arcuate strips and are included in the grooves formed by the protrusions of the detachable half-liners and half-cages. Detachable half-shells are pulled together by fasteners.

EFFECT: increased reliability of fastening of centering ribs in detachable half-liners, the possibility of centering the rotational string coaxially with the inner wall of the tubing, as well as preventing the rotation of the centralizer in the tubing.

1 cl, 7 dwg