Thick oil metering device of compact offshore platform

Abstract

The invention discloses a thick oil metering device of a compact offshore platform. The thick oil metering device of the compact offshore platform is characterized in that a metering chamber comprises a metering chamber I and a metering chamber II; an oil inlet pipeline is communicated with the top of the metering chamber and respectively extends into the metering chamber I and the metering chamber II, and an inlet shutoff valve is arranged on the oil inlet pipeline; an oil outlet pipeline is respectively communicated with the bottoms of the metering chamber I and the metering chambers II; an outlet regulating valve is arranged on the oil outlet pipeline; radar liquid level transmitters are arranged in the metering chamber I and the metering chamber II; the radar liquid level transmitters and the outlet regulating valve are connected with a PLC (Programmable Logic Controller) meter. The thick oil metering device of the compact offshore platform has the advantages that the problem of difficulty in metering thick oil which produces bubbles and contains a great amount of saturated steam can be solved, the problem of great overall errors of measurement by using differential pressure level sensors is overcome, the metering precision is high, continuous metering can be realized, the oil drainage effect is good, and the metering accuracy is high; the device is simple to use and maintain, the structure is simple and compact, and the device can be applied to working conditions with higher spatial requirements; the operating cost is low and the popularization is facilitated.

Description

technical field [0001] The invention relates to a compact heavy oil metering device for an offshore platform, which belongs to the field of oil and gas metering. Background technique [0002] Heavy oil generally has the characteristics of high density, high viscosity, high oil-gas ratio, easy foaming, easy emulsification, and large sand content. It is difficult to separate oil, gas and water, so heavy oil is difficult to measure. At present, the metering schemes developed according to the characteristics of heavy oil are weighing heavy oil meter and self-balancing double-tank metering device. [0003] At present, the weighing type heavy oil metering device widely used in heavy oil fields has the instability of liquid phase and liquid level, which is difficult to control, and there are many mechanical movable parts. It is difficult to maintain internally. For the measurement of foaming crude oil and crude oil with a large amount of saturated steam The disadvantage of large e...

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Problems solved by technology

[0003] At present, the weighing type heavy oil metering device widely used in heavy oil fields has the instability of liquid phase and liquid level, which is difficult to control, and there are many mechanical movable parts. It is difficult to maintain internally. For the measurement of foaming crude oil and crude oil with a large amount of saturated steam Disadvantage of big error

[0004] For the self-balancing double-tank heavy oil metering device developed in recent years, it can effectively solve the problem of large metering errors of the weighing heavy oil metering device for foaming crude oil and crude oil with a large amount of saturated steam; however, the space of the offshore platform is small, The device occupies a complex area and pipelines, and is not suitable for installation on offshore platforms; in addition, the differential pressure liquid level gauge used in the device has the disadvantages of large comprehensive measurement error and easy aging of the pressure induction pipe

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