FIELD: mining.
SUBSTANCE: tool string extending in a longitudinal direction and comprising a first string part and a second string part, each having a centre axis and comprising: an electrical connection in a first end and a fluid channel extending at least partly through string part. Furthermore, tool string comprises a connecting element rotatably connected to one string part and adapted to be threadably connected to a threaded portion of other string part to join electrical connections of first and second string parts. Furthermore, present invention relates to a method for assembling two string parts of a tool string by rotating a connecting element.
EFFECT: improvement of string due to possibility of transmission as fluid medium, and electric energy from one part of string to other.
13 cl, 6 dwg
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