SEAL OF MOVABLE CONNECTION OF DOWNHOLE EQUIPMENT Russian patent published in 2013 - IPC E21B33/10 

FIELD: oil and gas industry.

SUBSTANCE: configuration of a movable connection increases service life of downhole equipment, allows avoiding accidents and complications both during operation of downhole equipment and at its removal from the well. A seal of the movable connection of downhole equipment consists of a sealing rubber ring, and working and protective washers. Working and protective washers are of split type. A groove is made on the stock. Working and protective washers are installed in the groove in a movable manner. The sealing rubber ring is located between working washers. There is a gap between inner diameter of the working washer and diameter of the groove for the sealing rubber ring. The gap is covered with protective washers. There is also a gap between inner diameter of the cylinder and outer diameter of the stock.

EFFECT: application of the proposed invention allows providing tightness of a seal at operation in the medium containing mechanical impurities, corrosive liquids, and preventing seizure of parts of the movable connection and destruction of a sealing rubber ring.

1 cl, 4 dwg