ELECTRIC DIVIDER FOR DRILLING PIPE COLUMN Russian patent published in 2007 - IPC E21B47/12 

FIELD: well drilling technology, possible use during organization of wireless electromagnetic communication channel for transferring face information onto surface.

SUBSTANCE: divider contains dielectrically mutually isolated upper and lower metallic subs, mounted between which are internal pipe and upper body, and isolation washer between internal pipe and upper sub. Upper body and internal pipe in their connection are made with low taper angle and mounted through isolation insert of highly durable non current-conductive material. Internal pipe from external body to lower sub is covered by external layer of isolation polymer composite material, and in place of connection to upper sub is provided with internal isolation layer. Internal isolation layer in place of connection of internal pipe to upper sub may be made in form of thin-walled pipe, held inside the upper sub by holding nut.

EFFECT: increased reliability, simplified construction of divider.

2 cl, 2 dwg