Patent ID: 6837314
Filing Date: 2005-01-04
Classification: E21B

Abstract:
1. An apparatus for use in a well borehole drilled into a formation, apparatus comprising: a work string disposed in the borehole, the work string including at least one modular body portion, the at least one modular body portion having at least one receptacle; and a modular tool disposed in the at least one receptacle for carrying out a drilling operation, wherein the modular tool comprises a formation testing device detachably coupled in the at least one receptacle, wherein the formation testing device comprises an extendable probe having: (a) a port for receiving formation fluid; and (b) a flexible barrier disposed in the probe for separating the port from a hydraulic fluid contained in a reservoir in the probe module, wherein a pump disposed on the work string operates to vary the amount of hydraulic fluid in the reservoir, the varying amount causing the flexible barrier to flex, the flexing barrier thereby urging formation fluid into the port.