ELECTRIC WELL HEAD SYSTEM Russian patent published in 2006 - IPC E21B47/01 E21B33/03 

FIELD: oil industry, particularly to connect to or disconnect electric submersible pump cable from ground-based station cable.

SUBSTANCE: well head system comprises upper cable module with coupling nut, connector and lower cable module with flange. Above components are provided with isolation means with orifices for cable cord receiving and sealing rings arranged along mating cylindrical surfaces in connection areas between upper and lower cable modules and connector. The connector is made of flexible cable and is provided with cylindrical body arranged in upper flexible cable part. The body has tread and cavity defined by partition and inner conical surface with thread. The partition has orifices to receive cable cords covered with insulation material and uniformly distributed along a circle. Collar with outer conical surface, gasket having orifices to receive covered cable cords uniformly distributed along a circle and threaded bush with central orifice are arranged in cylindrical body interior. Bush with cavity defined by partition and inner threaded conical surface is located in lower cable part. The partition has orifices to receive cable cords covered with insulation material and uniformly distributed along a circle. Collar with outer conical surface, gasket having orifices for cable cords uniformly distributed along a circle receiving and threaded bush with central orifice are located in above bush interior. Interiors of the cylindrical body and the bush are filled with compound located between gaskets and armored cable ends. Lower cable unit interior has structure similar to upper connector part structure. Upper cable unit interior has structure similar to lower connector part structure.

EFFECT: possibility of safe well head system installation on domestically produced production trees.

2 dwg