BIDIRECTIONAL MECHANICAL PACKER Russian patent published in 2015 - IPC E21B33/12 

FIELD: oil and gas industry.

SUBSTANCE: mechanical packer comprises the upper and lower mandrel. The lower mandrel has a closed cam slot at its outer surface. The lower anchor bend is placed at the lower mandrel. The lower anchor bend comprises a body, the lower enclosure with lower spring-actuated pipe arms. In the middle part of the body there are rectangular windows with spring-actuated centralizers placed in them and retained by the upper and lower covers. In the lower part of the body there is a circular outer groove, which connects a split ring to the lower part of the body. The ring has an inner circular groove and an outer plain spigot. A pin lock is installed into the ring. At the upper mandrel there is a support cone pressed to the plain spigot and capable of axial movement. Over the cone there is the lower anti-extrusion unit, seal cups and the upper anti-extrusion unit. The upper anchor bend is placed over it. The upper anchor bend comprises a conical sleeve, a nut, the upper enclosure with the upper pipe arms. Under the pipe arms there is a split cone tied up by locking rings. The cone is supported by the thrust. The thrust is supported by a springy pack consisting of two outermost thrust rings and the middle thrust ring and two split rings placed in-between.

EFFECT: invention allows higher efficiency and operational reliability of the packer.

2 cl, 4 dwg