UNIT FOR PROTECTION OF SEALING ELEMENT OF PACKER FROM RUBBER INFLOW INTO ANNULAR GAP BETWEEN WALL OF CASING STRING AND PACKER BODY Russian patent published in 2024 - IPC E21B33/12 E21B23/06 

FIELD: oil production.

SUBSTANCE: proposed invention relates to structural elements of packers. Packer sealing element protection assembly against rubber inflow into the annular gap between the casing wall and the packer body comprises expandable supports, including a base, having external cylindrical and internal conical surfaces, leg made with external cylindrical surface. Assembly consists of equal number of sliding supports of the first and second types, at least two of each type, which are made of a cut hollow part of rotation. Bases of sliding supports of the first type have flat side surfaces with a slope, which are identical on both sides, converging in the direction of the leg. Bases of sliding supports of the second type have mating flat side surfaces with a slope, which are identical on both sides. Side surfaces with inclination of bases of sliding supports of the first type interact with mating side surfaces with inclination of bases of sliding supports of the second type. Legs of extensible supports of the first and second types are arranged inside the packer body. External cylindrical surfaces of legs of sliding supports of the first and second types interact by means of an elastic element. Inner cylindrical surfaces of extensible supports of the first and second types contact with the packer shaft, and the inner conical surface of the base of the sliding supports of the first type interacts with the packer cone.

EFFECT: higher quality of intertubular space sealing, higher packer reliability, lower assemblage labor input and widened range of applicability.

4 cl, 26 dwg