Multi-branch oil-gas-liquid phase separator

Abstract

The invention discloses a multi-branch oil-gas-liquid phase separator. An oil-gas-liquid intake manifold is divided into an ascending pipe section and a descending pipe section, wherein the tail section of the ascending pipe section of the oil-gas-liquid intake manifold, and the front section and middle section of the descending pipe section are provided with an intake branch pipe respectively; and the intake branch pipes are converged at a position above and parallel to a separator barrel and then connected with a gas-phase intake manifold which is connected into the separator barrel from the top of the separator barrel. The multi-branch oil-gas-liquid phase separator has the advantages of improving the intake way and structural form of the conventional oil-gas-liquid phase separator, performing oil-gas-liquid gravity pre-separation by arranging an inclined diameter-variable intake manifold and a multi-branch lifting pipe, changing one-stage gravity pre-separation into two-stage gravity pre-separation, changing the flow regime of a fluid and gas liquid ratio of the oil-gas-liquid separator and effectively gathering slug flows formed in a pipe-conveying and pigging processes to achieve the effect of high-speed, safe and high-efficiency separation.

Description

Technical field [0001] The invention relates to an oil-gas-liquid three-phase separation device, in particular to a multi-branch pipe oil-gas-liquid three-phase separator with a slug flow catching function dedicated to oil and gas fields in petroleum and petrochemical industrial systems. Background technique [0002] In recent years, large oil and gas fields and hydrocarbon-bearing structures have been discovered one after another in the vast beach areas and western Gobi and desert areas. However, the natural environmental conditions are very harsh, it is difficult to carry out project construction on the spot, and the required project investment and management costs are also extremely high. Therefore, in order to efficiently, safely and economically carry out development and construction, domestic efforts are being made to develop multiphase flow transportation technology, which transports oil, gas, and water media through a pipeline to downstream processing stations for process...

AI Technical Summary

Problems solved by technology

At present, downstream processing stations usually adopt two schemes to receive upstream oil and gas media. One is the segmental flow trap, which has the advantages of large processing capacity and strong adaptability, and is often used in the development of large oil and gas fields. The disadvantage is that it is disposable The investment is high, often tens of millions. Once the gas field development plan changes, it is easy to cause waste of investment. At the same time, it occupies a large area and is not suitable for stations with narrow terrain; the other is conventional horizontal or vertical gravity oil-gas-liquid separation The device has a small processing capacity and a narrow processing range, and can only meet the oil-gas-liquid separation accuracy requirements within a certain range. In the middle and late stages of gas field development, due to the large increase in water content, it often cannot meet the requirements of actual production and operation.

In addition, due to the local slug flow in the pipeline during the pigging operation, it is easy to have a serious impact on the separation effect of the conventional oil-gas-liquid separator and the measurement accuracy of the downstream, which seriously endangers safety.

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