DRILL COLUMN Russian patent published in 2014 - IPC E21B47/12 

FIELD: mining.

SUBSTANCE: drill column contains two elements connected to each other detachably and rigidly with respect to rotation. Each element of drill column contains inner and outer pipe. Between them there formed is annular receiving cavity. Each element of drill column has a wire for power or data transmission. The wire passes along longitudinal axis of drill column. Each wire for power or data transmission is connected to induction coil. For power or data transmission along drill column induction coils are designed with possibility of inductive coupling with each other. The first element of drill column is provided with inner induction coil on outer circumference of its inner pipe. The second element of drill column is provided with outer induction coil on inner circumference of its outer pipe. Induction coils are made segmented consisting of several annular segments and at least partially are overlapped in radial direction. At least two segments are detachably connected to each other.

EFFECT: providing compact and easy performed connection for power or data transmission wires during upgrade, simplifying operations performed with induction coils.