Abstract: An extremely high water cut oil-gas-water three phase flow water removing device includes a mist eliminator (8), a fluid stabilizer (7), a liquid collection chamber (2), a fluid directing duct (5), an inlet connection pipe section (10), a gas outlet connection pipe section (9), a mixture liquid exit connection pipe section (4), a free water outlet connection pipe section (1). The function of the device is to effectively remove most of the free water from the high water cut oil-air-water three phase flow mixture liquid. An extremely high water cut oil-air-water three phase flow measurement apparatus and a measurement method using the water removing device are also disclosed.

Abstract: A flow metering method for an annular gas and liquid flow comprises the following steps of: first, enabling a gas and liquid mixed fluid to flow through a vertically arranged circular pipe so as to form the annular gas and liquid flow; and then measuring total flow or liquid average velocity or gas average velocity of the gas and liquid mixed fluid; measuring physical quantities, such as temperature, pressure, gas fraction and the like, of the gas and liquid mixed fluid; and finally, accurately figuring out liquid volume flow and gas volume flow according to analysis of a gas and liquid slip factor.

Abstract: The present invention relates to a positron tomography imaging apparatus for a multiphase flow in an oil pipeline, which apparatus utilizes positron and electron annihilation generating a pair of coincidence gamma-rays of 511 keV energy as tomography imaging means and provides an on-line tomography imaging function for metering a multiphase flow in an oil pipeline of an oil field. The apparatus comprises a plurality of sets of parallel high-precision gamma-ray detector arrays with a particular space structure arrangement, a positron radioactive source and a shield, and can acquire a phase fraction of such multiphase flow mixture as oil, gas and water under a condition of a single radioactive source by combining an image processing function. The design of a plurality of sets of high-precision detector arrays also greatly improves accuracy of a multiphase flow metering and its applicability in multiphase flows of different flow patterns.

Abstract: The present invention relates to a positron tomography imaging apparatus for a multiphase flow in an oil pipeline, which apparatus utilizes positron and electron annihilation generating a pair of coincidence gamma-rays of 511 keV energy as tomography imaging means and provides an on-line tomography imaging function for metering a multiphase flow in an oil pipeline of an oil field. The apparatus comprises a plurality of sets of parallel high-precision gamma-ray detector arrays with a particular space structure arrangement, a positron radioactive source and a shield, and can acquire a phase fraction of such multiphase flow mixture as oil, gas and water under a condition of a single radioactive source by combining an image processing function. The design of a plurality of sets of high-precision detector arrays also greatly improves accuracy of a multiphase flow metering and its applicability in multiphase flows of different flow patterns.

Abstract: An extremely high water cut oil-gas-water three phase flow water removing device, which includes a mist eliminator (8), a fluid rectifier (7), a liquid collection chamber (2), a fluid directing duct (5), an inlet connection pipe section (10), a gas outlet connection pipe section (9), a mixture liquid exit connection pipe section (4), a free water outlet connection pipe section (1). Its function is to effectively remove most of the free water from the high water cut oil-air-water three phase flow mixture liquid. An extremely high water cut oil-air-water three phase flow measurement apparatus and a measurement method using the water removing device are also disclosed.