Patent ID: 9429011
Filing Date: 2016-08-30
CPC Classification: E21B,G01N

Claim Text:
1. A method of testing liquids at an elevated test pressure, the method comprising the steps of: placing a first fluid in a first chamber of a test system; bringing the first fluid to a test pressure different from atmospheric pressure; calculating a volume of a second fluid to inject into the first chamber from a second chamber of the test system via a first portion connecting the first chamber and the second chamber, wherein the first portion comprises a fluid interface between the first fluid and the second fluid located in the first portion; injecting the volume of the second fluid into the first chamber at a pressure higher than the test pressure, wherein injecting the volume of the second fluid into the first chamber displaces an equivalent volume of fluid into a third chamber of the test system via a second portion connecting the first chamber and the third chamber in fluid communication with each other, wherein the equivalent volume of fluid was present in the first chamber prior to injecting the volume of the second fluid; mixing the volume of the second fluid in the first chamber and a remaining volume of the first fluid in the first chamber to create a combination fluid having a volume equal to a total volume of the first fluid that was present in the first chamber prior to injecting the volume of the second fluid; and testing the combination fluid.