The invention relates to the technical field of
oil field oil production engineering, in particular to an underground
data acquisition unit with flow, pressure and
temperature monitoring functions and a method. The method is suitable for underground working
condition monitoring of submersible motor type
lifting equipment such as submersible screw pumps, submersible
plunger pumps and submersible centrifugal pumps. The unit comprises a pressure-resistant shell, wherein a central
pipe, an
electromagnetic flowmeter, two pressure and temperature sensors and an underground parameter collector are integrated in the pressure-resistant shell; the two sensors are used for measuring the
temperature and pressure of liquid flow of the central
pipe and the
temperature and pressure of an oil casing annulus respectively; the
electromagnetic flowmeter measures the flow, and real-time
temperature and pressure data are used for compensation to improve the precision. The unit is further provided with a collecting
pipe, an upper end, a lower end, a connecting sliding ring, an annulus / oil pipe inner testing channel, a sealing
rubber ring and the like. Through the
integrated design, synchronous high-precision in-situ monitoring of underground key parameters is achieved, the problem that underground data of multiple instruments are not synchronous is solved, and a reliable
data terminal is provided for an intelligent
oil field.