DEVICE FOR SEPARATION OF INDIVIDUAL SECTIONS OF WELL SHAFT Russian patent published in 2016 - IPC E21B33/12 

FIELD: machine building.

SUBSTANCE: invention relates to packers. Device for separation of individual sections of well shaft includes pipe string, a sealing element of cylindrical shape, arranged concentrically to pipe string between itself and casing pipe, sealing element is made of two parts: upper part, made from material with relatively low thermal expansion factor and lower part, having a relatively high coefficient of thermal expansion, wherein both parts without axial clearance are installed between upper and lower supports, rigidly connected to pipe string and support nozzle-coupling fitted on end of lower pipe string. Upper sealing element is made from filled fluoroplastic, and lower sealing element is made from basalt fibre with diameter from 0.5 to 3.5 mcm, saturated with aluminium powder.

EFFECT: technical result is possibility of operating device at high pressure and temperature.

6 cl, 1 tbl, 2 dwg