On April 13, the test procedure of selecting test valve was successful in high temperature and high pressure reservoir oil test of No.3-27 Nanpu Oilfield in Jidong Oilfield, which greatly expanded the scope of application of test valve. The depth of the test wells in Nanpu 3-27 well is above 4,400 meters and the formation pressure coefficient is 1.4. Deep wells, high formation pressure coefficient, difficult to test, and the measured reservoir temperature of 164 degrees Celsius also created a choice of test valve in the domestic application of temperature records. Jidong Oilfield Exploration and Development Project Department and Bo drilling test company technical staff through systematic verification, creatively change the selection of test valve pressure collection and relief part of the structure of the key components of the repeated maintenance commissioning, selection of high temperature seals, optimize the design of the column Structure, and pre-test simulation of different conditions in the workshop operation. In the field application, the workers from the wellbore preparation, the test oil into the well tool, perforating perforation, test the switch well and other links step by step, fine operation, and ultimately ensure that the well of two high temperature and high pressure test success, Obtained formation liquidity and productivity parameters. The choice of test valve has withstood the test of harsh conditions such as high temperature and high negative pressure, adding technical means for oil testing of special reservoirs, marking the improvement of the special oil testing technology of Jidong Oilfield.