Multiphase metering and sampling device with adjustable diversion ratio

Abstract

The invention discloses a gas-liquid two-phase flow variable-proportion thief, and belongs to the field of multiphase flow metering. The invention relates to a multiphase metering and sampling devicewith an adjustable diversion ratio. The multiphase metering and sampling device mainly comprises a diversion pipe, a main fluid chamber, a sampling chamber and sampling pipes, diversion holes are uniformly distributed in the circumferential direction of the diversion pipe, and the sampling pipes are arranged at outlets of the partial diversion holes; each sampling pipe is composed of an outer plugbody and an inner plug body, and the inner plug bodies can move up and down in the outer plug bodies; and by adjusting the sampling pipes, the flow rate of sub-fluid entering the sampling chamber canbe changed, and then the expected diversion ratio is obtained. Compared with an existing gas-liquid two-phase flow sampling device, the multiphase metering and sampling device is small in size and compact in structure, the distribution ratio can be adjusted at will, and sampled fluid and main fluid have the same gas-liquid composition and are not affected by parameters such as inlet gas-liquid phase flow velocity and flow pattern.

Description

technical field [0001] The invention belongs to the field of fluid distribution, in particular to a multi-phase metering and sampling device used for single-well flow metering in oil and gas fields. Background technique [0002] Single well metering is the basis for mastering the production dynamics of oilfields and formulating scientific development and adjustment plans. The produced oil and gas often need to be metered before entering the downstream gathering and processing process. The production medium at the wellhead is a gas-liquid mixture, and conventional single-phase metering instruments are difficult to apply, so multi-phase metering devices are required. According to whether separation is performed during the measurement process, multiphase metering methods can be divided into two categories: separation type and non-separation type. The separation type metering method uses a separator to completely separate the gas-liquid two-phase incoming flow, and then uses a ...

AI Technical Summary

Problems solved by technology

The three-way tube is the simplest sampler, but phase separation usually occurs during the sampling process, resulting in a deviation between the sampled fluid and the measured fluid

If the production rate continues to decrease while the split ratio is maintained, the gas-liquid flow into the sample fluid circuit will be reduced, which will reduce the sample fluid metering accuracy

Images