december in 2016, after 500-day continuous and stable operations of the products in daqing and shengli oilfields respectively, the product demonstrated its compliance with the users' requirements, for which they issued a user report, and the company became eligible for mass production and supply.
started batch manufacturing continued the down-hole field testing, and meanwhile set about the formulation of technical standards for manufacturing and testing;
carried out an experimental well test of the 4th generation prototype and completed the verification of overall reliability of the product;
carried out a test of the 3th generation prototype in a ht hp homeostasis experimental well and improved its down-hole insulation sealing technology;
carried out an experimental well test of the 2th generation prototype to verify and improve the system's down-hole insulation sealing;
developed and improved the software platform and carried out a down-hole test of the system for the first time;
succeeded in laboratory verification of the working principle and a prototype run；