Multistage separation technology and device

Abstract

The invention provides a multistage separation technology. Oil, gas, water and solids are separated through primary separation of a separating tube, secondary double separation of the separating tube, liquid-solid separation, third separation of the separating tube, primary cyclone separation, secondary cyclone separation, fourth separation of the separating tube, settling separation and cycling. A multistage separation device comprises a primary separating tube, an upper tube unit of a secondary separating tube, a lower tube unit of the secondary separating tube, a liquid-solid separator, a third separating tube, a cyclone I, a cyclone II, a fourth separating tube, a settling tube and a liquid storage tank. Oil, gas, water and solids are quickly separated by means of the characteristics of the pipeline, the density difference of phase media and dynamic separation, a conventional method of separating multiple phases by means of a container is broken through, an explosion failure mode of the pressure container is converted into a leakage failure model of the pressure pipeline, so that the safety management risk of equipment is greatly reduced.

Description

technical field [0001] The invention relates to separation equipment in the field of oil and gas and sewage treatment, in particular to a multi-stage separation process and device. Background technique [0002] As most of my country's oilfields gradually enter the mid-to-late stage of exploitation, the water content of crude oil continues to increase. On the one hand, the amount of produced fluid and sewage treatment increases sharply. Some process equipment in the gathering and transportation system cannot meet the production requirements. The water content and total liquid volume of heated crude oil increase, resulting in a substantial increase in energy consumption for production; In particular, the difficulty of sewage treatment has increased sharply, which puts forward higher requirements for oil, gas and water solids treatment equipment. In addition, with the development and production of oilfields, the original separators in each station cannot meet the actual changes ...

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Problems solved by technology

[0002] As most of my country's oilfields gradually enter the mid-to-late stage of exploitation, the water content of crude oil continues to increase. On the one hand, the amount of produced fluid and sewage treatment increases sharply. Some process equipment in the gathering and transportation system cannot meet the production requirements. The water content and total liquid volume of heated crude oil increase, resulting in a substantial increase in energy consumption for production; In particular, the difficulty of sewage treatment has increased sharply, which puts forward higher requirements for oil, gas and water solids treatment equipment

In addition, with the development and production of oilfields, the original separators in each station cannot meet the actual changes due to their design conditions and operating parameters, and it is difficult to meet the oil and water separation requirements

Judging from the current use of three-phase separators in various domestic oilfields, due to the obvious lack of theory and experience in designing three-phase separators, coupled with differences in national conditions and factory manufacturing, the actual operating parameters of the three-phase separators often differ from those provided by the site. Incompatibility, coupled with the influence of the deposition of solid particles in the liquid in the stable section, leads to poor separation effect of the three-phase separator, and many three-phase separators are useless

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