| 摘要 |
A downhole tool 20 being adapted to operate in a well bore includes a housing surrounded by an outside fluid. The housing has a cooling fluid outlet 26, the cooling fluid outlet 26 being open to said outside fluid. The tool 20 has 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 35a and a heat transfer device 40 for exchange of heat between the cooling fluid 35a and the downhole tool equipment. |
