UNIT OF SHANK END PACKING IN HORIZONTAL WELL Russian patent published in 2010 - IPC E21B33/10 

FIELD: oil and gas production.

SUBSTANCE: invention refers to oil and gas producing industry, particularly to facilities for well completion and can be implemented at installing shank ends-filters in directional and horizontal boreholes of wells. The facility consists of a hollow case, of a sealing unit in form of sections of collars and of a centraliser positioned above the sections of the collars. Also the centraliser located above the shank end from inside is equipped with left hand thread for positioning equipment with an over located cone guide, from outside it is equipped with lengthwise grooves. The sections of the collars are set with tightness on the case. They correspond to composed packing washers, where in between there are installed spring washers. Also diametres of washers in the sections exceed diametre of a column with arranged sections of the collars. The sections of the collars are positioned between rigid circular insertions; in insertions there are made openings for tightening rods.

EFFECT: minimal metal input and simple design reduce expenditures for fabrication of shank end and for its installation in well; packing unit of shank end compensates heat expansion of shank end and ensures reliable packing and centring in well due to axial mobility and to alternating packing heat resistant washers and steel spring washers.

2 dwg