Test apparatus, and method for accurately and quickly measuring formation pressure, and permeability in oil and gas producing formations; especially low or high permeability formations. The test apparatus can be transported on a drill string, or cable. Preferably, it is employed as a component of a wireline...http://www.google.es/patents/US5233866?utm_source=gb-gplus-sharePatente US5233866 - Apparatus and method for accurately measuring formation pressures
Apparatus and method for accurately measuring formation pressures
