SU1282864A1 - Apparatus for preliminary separation of petroleum and gas - Google Patents

Abstract

The invention relates to a device for preliminary separation of oil and gas and provides high-quality separation of gas and oil streams with an expendable gas content of more than 0.98. The device includes a horizontal cylindrical section 1, which passes into the sunrise, a cylindrical section 2. To the end of the horizontal and the beginning of the upstream sections there are oil removal pipes 3 and 4. In front of the oil removal pipe 3 there is a film cutting ring 5 with a horizontal forming nozzle 6 , and after it, in the course of the mixture movement, the breakdown pipe 7. A liquid cutter 8 is located above the oil removal pipe 4. The film-cutting ring 5 rejects the liquid portion of the dispersed flow from the wall. pipes and lower generatrix, where the liquid falls under the forming nozzle 6 and discharged into petroleum teotvod conduit 3. eccentrically positioned pipe 7 reduces entrainment u precipitated liquid gas flow. The fluid accumulating in the upstream section flows downwards and is drained through the perforations into the oil recovery pipeline 4. 2 h. the item of f-ly, 4 ill. (L

Description

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The invention relates to devices for separating gas and oil streams into oil and gas and can be used in the oil industry in the nodes of the first stage of oil separation in fields with extensive subgas areas.

The purpose of the invention is to provide high-quality separation of a gas-oil flow with an expendable gas content of more than 0.98.

FIG. 1 shows the general scheme of the proposed device; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one.

The device includes a horizontal cylindrical section 1 of the pipeline, which passes into the ascending cylindrical section 2. To the end of the horizontal and the beginning of the upstream sections there are oil recovery pipelines 3 and 4. In front of the oil removal pipe 3 there is a cutting ring 5 forming a nozzle 6, and behind it in the course of the movement of the mixture - a breakdown pipe 7 with a scaled input. Above the oil discharge pipe 4 there is a liquid shut-off 8. The device is connected to an oil discharge manifold 9. Gas. From the device, it is taken to the gas separator through the gas exhaust manifold 10 and the oil to the oil separator collector 11 to the oil separator. Film-cutting ring 5 is set at an angle of 45-60 ° to the axis of the horizontal section. The slope angle of the ascending portion is 15 °. The horizontal forming nozzle is carried out along the length up to the oil removal pipe.

The fender pipe is located eccentrically with an upward displacement in such a way that the end of the upper one forming it is located on the same vertical line with the oil recovery pipe. The liquid cutter is installed so that there is a stagnant zone behind the second oil recovery pipeline. The rear partition of the shutter is perforated with openings with a diameter of 25 mm.

The installation of the film cutting ring at an angle of 45-60 ° to the axis of the horizontal section is due to the fact that at the same time the minimum drift of the dropping liquid (60-100 g / m) is achieved and stable liquid withdrawal and its overflow to the lower forming pipe are provided.

When installing the ring at an angle of less than 45 °, overflow of the cavity of the ring with liquid and its exit beyond the cavity is observed. As a result, the liquid entrainment by the gas flow increases.

When installing the ring at an angle of more than 60 °, the liquid from the cavity of the ring is blown off by a gas stream in the form of a thin film from the ends and the liquid is drained into the lower tube forming line. As a result, the entrainment of liquid by the gas flow also increases.

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The device works as follows. A film-dispersed gas-oil mixture with an expendable gas content of 0.98 or more through the oil feed

the collector 9 enters the horizontal section 1. The film-cutting ring 5 rejects the liquid part of the dispersed flow from the pipe walls to the lower generating line, where the liquid enters the horizontal forming nozzle 6 and merges into the refinery pipeline 3. Next, the liquid enters the oil withdrawal collector 11. To reduce the entrainment of the precipitated liquid by the gas flow at the end of the horizontal section above the oil recovery zone of the oil withdrawal pipeline 3, the baffle pipe 7 is located eccentrically, having a beveled entry. Under the influence of gravitational forces, the fluid precipitates and accumulates in the lower part of the ascending portion 2, from which

0 through the oil discharge pipe 4, liquid is withdrawn. The liquid cut-off 8 prevents gas from escaping into the oil removal pipe 4. Liquid droplets coagulating and falling out in the upper part of the upstream section flow downwards. Through the perforated holes in the rear wall of the shutter 8, the liquid accumulating behind the shutter is drained into the oil withdrawal pipe 4 and further into the oil withdrawal collector 11. The gas enters the exhaust section 10. The separated gas and liquid are fed into the process equipment (gas and oil separators) facilities for further training.

With an increase in consumable content

liquids in the upstream region similar to that shown in fig. 1, after 2-2.5 m several oil outlets with liquid shut-off valves can be installed.

Using the proposed device

0 allows to reduce the entrainment of dropping liquid with gas, provides conditions for the normal operation of technological devices for the further preparation of oil, and increases their productivity.

Claims (3)

Invention Formula I. A device for preliminary separation of oil and gas, including cylindrical horizontal and ascending pipeline sections with oil supply and gas collectors and oil drainage pipelines connected to the oil removal manifold, in order to ensure high quality separation of gas and oil flow with a gas content of more than 0.98, the first downstream oil pipeline is connected to the end of the horizontal The device is equipped with a film cutting ring and a fender pipe with a beveled inlet installed in a horizontal section, respectively, before and after the first oil drain of the auxiliary pipeline, and liquid cutters installed at the inlet to the subsequent oil removal pipelines. Aa Rig.y. 2. The device according to claim 1, wherein that the film cutting ring is set at an angle of 45-60 ° to the axis of the horizontal section. 3. The device according to claim 1, characterized in that the baffle pipe is located eccentrically with upward displacement. 6-s AT-& 5 iPus.