DOWNHOLE TOOL COOLING SYSTEM

摘要

A downhole tool being adapted to operate in a well bore (2) is shown, the downhole tool comprising: a housing (28) surrounded by an outside fluid, the housing having a cooling fluid outlet (26), the cooling fluid outlet being open to said outside fluid, an electronics compartment for installation of downhole tool equipment (60), a cooling system, which comprises a cooling fluid tank (30) fillable with a cooling fluid and a heat transfer device (40) for exchange of heat between the cooling fluid and the downhole tool equipment.