Patent ID: 8381816

Claim:
A method of flushing a wellbore fluid from a downhole tool containing a bearing package, the method comprising: pumping hydraulic oil from a flushing block through at least one hydraulic inlet line and at least one pneumatic inlet line connected to a main housing and into an annulus formed between the bearing package and the main housing of the downhole tool, wherein the hydraulic oil replaces the wellbore fluid in the annulus; removing the wellbore fluid from the annulus through at least one hydraulic outlet line and at least one pneumatic outlet line connected to the main housing; pumping air from the flushing block through the at least one pneumatic inlet line connected to the main housing and removing the hydraulic oil from the at least one pneumatic inlet line connected to the main housing; and removing the hydraulic oil through at least one pneumatic outlet line connected to the main housing.