MECHANICAL PACKER WITH PROTECTION AGAINST IMPURITY Russian patent published in 2024 - IPC E21B33/129 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to equipment for oil and gas industry and is intended for long-term tight separation of casing string intervals during development and operation of oil, gas and injection wells, in particular for protection of mechanical packers from mechanical impurities. Disclosed is a downhole mechanical packer with an impurity protection unit, comprising a rod, in the upper part of which there is a sub, unit of protection against impurity, upper mechanical anchor consisting of upper housing, upper dies pressed by upper spring through stop, upper cone, load regulator mechanism located inside the casing connected to the middle housing, lower mechanical anchor consisting of lower housing with lower dies pressed to rod by lower spring, lower cone, planks retained on lower housing by tires by means of screws, sealing elements. At the same time the unit of protection against impurity includes a movable bushing with a collar and is placed in the upper part of the downhole mechanical packer. Collar in its upper part has a conical projection and a straight surface, which interact with the corresponding conical groove and a straight thrust surface in the lower part of the sub. In the lower part of the collar there is a projection which interacts with the inner projection of the upper housing. Movable bushing has a constant outer diameter, which corresponds to the inner diameter of the collar, and is placed on the rod between the straight thrust surface of the adapter and the upper part of the upper housing.

EFFECT: ensuring elimination of collar squeezing and pulling out during operation of mechanical packer, uniform compression of collar in volume and attachment of collar in place of engagement during operation of mechanical packer.

1 cl, 2 dwg