Patent ID: 8448703

Claim:
A system for pumping fluid at least partially through a downhole tool disposed in a wellbore, comprising: a displacement unit configured to pump the fluid; a first flowline hydraulically connected to the displacement unit through a valve network for selectively communicating the fluid to or from the displacement unit; a second flowline hydraulically connected to the displacement unit through the valve network for selectively communicating the fluid to or from the displacement unit; a first chamber pressure gauge hydraulically coupled with a first chamber of the displacement unit; a second chamber pressure gauge hydraulically coupled with a second chamber of the displacement unit; a power supply providing a force configured to operate the displacement unit; a force sensor configured to measure the force supplied to the displacement unit; a sample probe hydraulically coupled to the first flowline; an inflatable member hydraulically coupled to the first flowline; a first flowline pressure gauge hydraulically coupled to the first flowline between the sample probe and the valve network; and a fluid sample chamber hydraulically coupled to the second flowline.