The PressureXpress-HT service from Schlumberger provides accurate formation pressure measurements under the most extreme conditions. Rated at 450 degF (232 degC) at 20,000 psi for at least 14 hours, the service allows acquisition of pressure and fluid mobility measurements in a fraction of the time required by multifunction formation tester tools. Fully combinable with other Schlumberger wireline devices, the PressureXpress-HT tool saves time and money by eliminating a separate wireline run to obtain critical pressure.