SET OF SLIDING SUPPORTS FOR PACKER Russian patent published in 2014 - IPC E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry and can be used in packers for protection of the packer sealing element from rubber flowing into an annular gap between the casing wall and the packer body. A set of sliding supports for the packer consists of supports of the first and second type installed with alternation. Sliding supports for the packer of the first and second type are made as a cylindrical tube cut symmetrically at its lateral surfaces; they contain a liner, a leg and a base. The liner has the outer conic surface, the inner cylindrical surface and lateral surfaces. The leg has the outer cylindrical surface and lateral surfaces. The base has the outer cylindrical surface, the inner conic surface and lateral surfaces. Inside the ram there is the inner cylindrical surface. The outer conic surface of the liner parallel to the conic surface of the base is made with transition to the outer cylindrical surface of the leg. The leg and the base are made as a cut hollow cylinder truncated at sides thus forming similar flat surfaces at both sides. The outer cylindrical surface of the tailpiece and base respectively are made with transition to flat surfaces. At that the flat surfaces of the lower base part for the sliding support of the first type are made with transition into shield. At both sides of the base lower part for the sliding support of the second type there are matching shapes for shield made as a recess.

EFFECT: improving reliability of sliding support structure, ensuring simple and convenient assembly at installing supports to the packer, providing reliable sealing of annular space between the casing wall and the packer body, ensuring guaranteed return of the packer sliding supports into initial position.

4 cl, 5 dwg