Patent ID: 9545037
Date: 2017-01-10
CPC Classifications: H05K

Claim:
1. A sealed drive system for downhole electric equipment, the sealed drive system comprising: two or more electrical components configured to produce an electrical output waveform that drives the downhole electric equipment; an enclosure forming two or more sealed compartments, wherein each of the two or more sealed compartments prevents external air outside of the two or more sealed compartments from entering the two or more sealed compartments, and wherein at least a respective one of the two or more electrical components is contained within each of the two or more sealed compartments; two or more air-to-air heat exchangers, each of the two or more air-to-air heat exchangers adjacent to a respective one of the two or more sealed compartments, wherein the two or more air-to-air heat exchangers cools internal air within each of the two or more sealed compartments without allowing the external air to enter the two or more sealed compartments; and a duct which is adjacent to the two or more sealed compartments, wherein the two or more air-to-air heat exchangers are positioned within the duct, wherein the external air flows through the duct and through each of the two or more air-to-air heat exchangers wherein the duct has at least one wall in common with the two or more sealed compartments, wherein the two or more of the electrical components in the two or more sealed compartments are positioned in thermal contact with the at least one common wall and thereby dissipate heat by conduction through the at least one common wall, wherein the two or more air-to-air heat exchangers each comprise a crossflow portion having a first set of passageways through which the internal air inside of the two or more sealed compartments flows and a second set of passageways through which the external air flows, the two or more air-to-air heat exchanger each further comprising a plurality of plates, wherein each plate has a substantially flat central portion, wherein the central portions of the plates are substantially parallel, and wherein for each of the plates, the central portion forms a wall between one of the passageways in the first set and one of the passageways in the second set.