Introduction The QCWY-1 Downhole Temperature and Pressure Measuring System of Electric sub-mersible Pump(oil field) is a set of highly precise and digital data collecting & processing system. Combining with Electric sub-mersible Pump, it makes up a complete set of single well oil collecting system, which can accomplish the measurement of under-well temperature and pressure. It consists of the composite device mainly made of above-well secondary instrument (ZFPT-2002 pressure and temperature instrument) and the composite device mainly made of under-well pressure and temperature transmitter, and the two devices are connected by the motor power cable. Under the support of the specialized system software, it can mainly accomplish the following tasks: ■To collect the under-well pressure and temperature signal; ■To compute the under-well pressure and temperature by micro processor according to the collected signal; ■To display and transmit momentarily the processed result according to the users?requirement; ■To switch off the power of the temperature and pressure measuring system by timing; QCWY-1 under-well temperature and pressure measuring system can measure by real-time the under-well temperature and pressure, while the electric sub-mersible pump is operating. The results of the measurement can be supplied to the concerned management and decision departments for analyzing the under-well situation. So that to realize the scientific control and management on oil collecting of the wells. Basic parameter Pressure measuring scale: 0-35Mpa accuracy: 1.0 Over pressure endurance: 1.5FS Temperature measuring scale: 0-120℃ accuracy: ?℃ Weight: downhole measuring transmitter (gauge)≤10kg Surface secondary instrument ≤1.8kg When motor抯 star point is unbalanced and voltage reaches 150VAC, its measuring error is not more than 0.06%. Function of insulated components: insulated resistance is not less than 2000MΩ when voltage reaches 2500VDC. Reliable short circuit protection: voltage of input port is not more than 1.5 VAC when one phase of power cable is grounding. ■The signal between the under-well testing transmitter and the above-well twice device is communicated by the high voltage cable of the oil pump. That抯 why the operation of this system will not affect the normal extract technology of the oil well. The test, display and control are operated at the same time when the oil pump is working. Typical Clients in China ■Sinopec Shengli Oil Field ■Sinopec Dagang Oil Field ■Sinopec Zhongyuan Oil Field ■Cnpc Daqing Oil Field ■Cnpc Xinjiang Kelamayi Oil Field ■Cnooc Bohai Oil Field ■Cnpc Xinjiang Tuha Oil Field