RU211920U1 - SEPARATOR - Google Patents

Abstract

The utility model relates to the field of gas purification from impurities, mainly from various types of liquid media, and can be used in gas, gas, oil, chemical and other industries for gas preparation. The separator contains a cylindrical body divided into chambers; inlet and outlet branch pipes, a drain pipe, two separation elements are placed inside the body, each of the separation elements includes a static vane swirler fixed motionless in the guide ring, which is fixed on the separating plate, an inclined partition with perforated holes for draining the liquid fraction is made in the lower part of the separator into the storage compartment. Due to the multi-stage purification of the gas-liquid flow, the problem of increasing the degree of purification of the gas flow with a high liquid content is solved.

Description

The utility model relates to the field of gas purification from impurities, mainly from various types of liquid media, and can be used in gas, gas, oil, chemical and other industries for gas preparation.

At the late stage of field development, sufficient gas flow rates in the wells and gas gathering network to completely remove the accumulated formation and condensation fluid are not always achieved. Liquid plugs increase the hydraulic resistance to gas flow and worsen the gas-dynamic characteristics of the system: reservoir-well-gas gathering network (GSS). To reduce losses, geological and technological measures are being taken to remove liquid plugs.

One of the common technical solutions to combat liquid plugs in HSS is the use of wellhead separators, which can significantly reduce the volume of liquid that enters the plume along with the flow of well production.

Separation devices for separating the liquid fraction from a gas stream are known from the technical field [RU 2423169, published on 07/10/2011, RU 2674948, published: 12/13/2018], the operation of which is based on the swirl of the gas flow passing through the separation elements.

Known devices are not effective enough in removing liquid and solid mechanical impurities during gas flow separation, especially at a late stage of field development, when the gas flow rate in the wells and the gas gathering network increases and it is necessary to completely remove the accumulating reservoir and condensation fluid from such a stream.

Known separator [RU 173761, published 09/11/2017], containing a cylindrical body, divided into a vortex and an additional chamber; inlet and outlet pipes, separation element and drain pipe; the inlet branch pipe is connected to a swirler deflector, the outlet of which is located in the vortex chamber.

The disadvantage of the known separator is the complexity of the design of the separator, the separator contains many parts, the flow of the purified gas changes direction several times, creating an additional dynamic load on the operation of the separator, which prevents the use of the known separator at high flow rates of the purified gas.

The technical problem that the proposed utility model is aimed at is the creation of a wellhead separator that can significantly reduce the volume of fluid entering the plume along with the flow of well products.

The technical result of the claimed utility model is to increase the efficiency of separation through the use of a two-stage separation of the gas stream.

The technical result is achieved in that the separator contains a cylindrical body divided into chambers; inlet and outlet pipes, a drain pipe, a separation element with a swirler, according to the utility model, an additional inlet flow direction pipe is connected to the inlet pipe, which is a continuation of the specified inlet pipe, two separation elements are placed inside the housing, each of the separation elements includes a static bladed swirler fixed motionlessly in the guide ring, which is fixed on the dividing plate dividing the separator into chambers, while the dividing plate, on which the first separation element is located, separates the preliminary chamber and the chamber of the first separation stage, the dividing plate, on which the second separation element is located, separates the first stage chamber from chamber of the second stage of separation, the outlet of the branch pipe for the direction of the incoming flow, the separation elements are located coaxially, in the lower part of the separator there is an inclined partition with perforated holes for draining the liquid filter raki in the accumulation compartment.

The essence of the utility model is illustrated by the following graphic materials.

Fig. 1 - Scheme of the separator, longitudinal section;

fig. 2 - Scheme of the separator in axonometric projection.

The separator consists of the following elements:

1 - cylindrical body;

2 - inlet pipe;

3 - outlet pipe;

4 - branch pipe for the direction of the incoming flow;

Separation element of the first separation stage:

5 - static blade swirler of the first stage of separation;

6 - swirler ring for the first separation stage;

7 - dividing plate of the blade swirler of the first stage of separation;

Separation element of the second separation stage:

8 - static blade swirler of the second stage of separation;

9 - swirler ring of the second separation stage;

10 - dividing plate of the blade swirler of the second stage of separation;

11 - inlet chamber of the separator;

12 - chamber of the first stage of separation;

13 - chamber of the second stage of separation;

14 - inclined partition separating the liquid accumulation compartment with solid mechanical impurities from the separation chambers;

15 - compartment for the accumulation of separated liquid with mechanical impurities;

16 - perforated holes of the inclined partition for draining liquid with mechanical impurities into the accumulation compartment;

17 - drainage pipe.

In common with a close analogue is that the separator contains a horizontal cylindrical body 1, inlet 2, outlet 3 branch pipes, while the separator is additionally equipped with an inlet flow direction branch pipe 4, which is located inside the separator and is a continuation of the inlet pipe 2.

The design feature of the proposed separator is the presence of two coaxially located separation element.

The separation element of the first separation stage consists of a static vane swirler 5 of the first separation stage, which is fixedly located in the guide ring 6, and is fixed by a welded joint and, together with the said vane swirler 5, the ring is fixed on the separation plate 7.

The separation element of the second separation stage is similar in design to the element of the first stage and consists of a static blade swirler 8 of the second separation stage, which is located in the ring 9 fixed on the separation plate 10.

Support plates 7 and 10 divide the separator into an inlet chamber 11, a chamber of the first separation stage 12 and a chamber of the second separation stage 13. An inclined partition 14 is made in the lower part of the separator, separating the liquid and solid mechanical impurities accumulation section 15 from the separation chambers 11, 12, 13 The inclination of the partition is made from the chamber 13 towards the chamber 11 in such a way that the liquid settling in the separator flows down to the perforated holes 16 of the inclined partition 14, and through these holes flows into the accumulation compartment 15, from which the discharge for disposal is carried out through the drainage pipe 17.

The separation elements of the first and second stages are located coaxially to create and pass a vortex flow.

The static bladed swirler 5 is located at the inlet flow direction pipe 4 of the inlet pipe and is designed to form a rotational (vortex) movement of the gas flow in the separator chamber 12.

The inner wall of the housing 1 and the support plate 10 form a trapping pocket in the chamber 12, in which moving liquid particles and mechanical impurities are removed from the vortex flow, pressed against the inner wall of the separator housing 1 by centrifugal force. Under the action of gravitational force, the liquid with mechanical impurities flows down to the inclined partition 14, and through the holes 16, enters the compartment 15.

The proposed separator has two stages with separation elements separated by an inclined partition from the separation chambers. This design allows you to avoid unhindered ingress of liquid into the outlet pipe 3 from the inlet chamber 11 of the separation, increases the separation efficiency.

To drain liquid with mechanical impurities, a vertical drainage pipe 17 is installed in the separator. The lower end of the drainage pipe 17 is fixed in an inclined partition 14, and the other end is fixed in the upper part of the housing 1.

The separator works as follows. The claimed utility model describes a vortex-type gas separator, which operates as follows.

The gas-liquid flow with an increased amount of liquid, which must be cleaned of liquid and mechanical impurities, is fed from the pipeline into the separator through the inlet pipe 1, and pipe 4, which directs the flow to the separation element of the first separation stage.

By means of a static bladed swirler 5 of the first separation stage, the gas-liquid flow is given the necessary acceleration and direction of movement, which makes it possible at the first stage to set the necessary gas-dynamic characteristics for the formation of the centrifugal principle of gas separation.

The ring 6 of the swirler 5 changes the direction of gas movement and, together with the swirler 5, forms its vortex movement coaxially with the separation element in the chamber 12, carrying out the first separation stage.

In space, the chamber 12 of the first stage of separation from the gas stream is allocated the bulk of the liquid and mechanical impurities. The main amount of liquid and mechanical impurities are thrown by centrifugal force onto the walls of the separator housing 1 and move along it in the direction of rotation of the gas flow, and under the action of gravitational forces flows down to the inclined partition 14 and further through the perforated holes 16 into the liquid phase accumulation compartment 16.

The aerosol fraction of liquid and mechanical impurities, which did not settle in the first separation stage, being mixed, falls on the outer surface of the swirler blades 8 of the second separation stage and is transported by the gas flow through the slotted channels with imparting rotational motion coaxially with the first separation stage.

The liquid residues that have entered the chamber 13 of the second separation stage in the form of a film under the action of gravity forces settle on the surface of the inclined partition 14, flow into compartment 15.

Thus, due to the multi-stage purification of the gas-liquid flow from liquid and mechanical impurities, the problem of increasing the degree of purification of a gas flow with a high liquid content is solved.

A prototype of the proposed separator in 2021 was manufactured at the applicant's enterprise. Field tests were carried out at the wells of the Medvezhye oil and gas condensate field in conjunction with a reservoir fluid disposal system. The separator showed high efficiency in separating the liquid phase with mechanical impurities when cleaning the gas flow coming from the well.

Claims (1)

A separator containing a cylindrical body divided into chambers; inlet and outlet pipes, a drain pipe, a separation element with a swirler, characterized in that an additional inlet flow direction pipe is connected to the inlet pipe, which is a continuation of the specified inlet pipe, two separation elements are placed inside the housing, each of which includes a static bladed swirler fixed motionless in the guide ring fixed on the dividing plate dividing the separator into chambers, while the dividing plate, on which the first separation element is located, separates the preliminary chamber and the chamber of the first separation stage, the dividing plate, on which the second separation element is located, separates the first stage chamber from the chamber of the second separation stage, while the outlet of the branch pipe for the direction of the incoming flow, the first and second separation elements are located coaxially, and in the lower part of the separator there is an inclined partition with perforated holes for draining the liquid fractions in the accumulation compartment.

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