PROTECTOR Russian patent published in 2010 - IPC E21B17/10 

FIELD: oil and gas production.

SUBSTANCE: protector for shielding power cable in well consists of seat and slot for installation of power cable, of reflectors interacting with internal channel of production string and of channel enveloping tubing string. Ends of the protector are arranged at angle α relative to surface of the tubing string. A trapezoid groove with radial thread orifices is made on external surface of the protector and there is also installed a trapezoid circular sector. Radius centre of the reflectors is shifted relative to coordinate axes X and Y of the tubing string. In the channel of the protector there is made a chamber with a circular groove and there is installed a flexible split ring with a collar on external surface and radial orifices for lock screws. Also left-hand screw surface with pointed vertexes is made on one side of the split ring, while on the opposite side there is made right-hand screw surface for fixation the flexible split ring on surface of the tubing string at screwing lock screws in. Current conducting elements and a capillary tube are fixed by means of the trapezoid sector in corresponding seats made in the slot of the protector.

EFFECT: raised reliability of fixation and insulation of current conducting elements and capillary tube while lowering tubing string into well.

5 dwg