RU190677U1 - DIGASATOR FLUID - Google Patents

Abstract

The utility model relates to devices for the degassing of liquid compositions used in the gas industry during the construction, maintenance and overhaul of underground gas storages. The technical result of the utility model is to simplify the design, increase its maintainability, as well as the ability to clean liquids with different sizes of impurities. the result is achieved by the fact that in a liquid degasser containing a housing divided by a partition into communicating chambers and settling zones, According to the technical solution, in each of the chambers in the upper part of the body, along its end and side walls, a curved pipe is installed with integrated flow dividers and with slit-like horizontally oriented openings in its lower part, communicating with its corresponding nozzle entering the mixture, and in one of the chambers a pipe with slit-like vertically oriented openings is installed, communicating with a liquid outlet pipe installed in the lower part of the body, and in that the lower housing part is also mounted inspection door with access to cameras and settling zones formed by the baffle plate made of perforated. Moreover, the housing is mounted on the supporting elements and contains fastening elements.

Description

The invention relates to devices for the degassing of liquid compositions used in the gas industry in the construction, maintenance and overhaul of underground gas storage facilities.

In the process of carrying out underground repair of the operating stock of wells in underground gas storage facilities using flushing fluids, natural saturation of flushing fluids with gas occurs, which leads to deterioration of technical characteristics, parameters and rheological properties of flushing fluids, which in turn can lead to complications up to uncontrolled release of formation fluid on the day surface. Special devices are used to remove gas from washing liquids.

A known degasser [1], which consists of cylindrical and conical parts. To the cylindrical part of the body tangentially connected inlet nozzle for the input of drilling and / or cement slurry. At the end of the cylindrical part of the housing, there is an upper outlet for air exhaust. The conical part of the body is equipped with a drain nozzle and elastic dividers located on the inner surface of the conical part of the body and made in the form of rods.

The closest to the claimed utility model is a flotator-degasser [2], containing a horizontal cylindrical body with elliptical bottoms, separated by primary and secondary overflow partitions with the formation of a flotation cell, a settling zone, a buffer and gas zones, the input pipe of a multiphase mixture, feeding the inlet parts of a multiphase mixture, branch pipes for the separation of separated phases, a pipeline for supplying the separated gas from the gas zone of the housing, a tray for collecting the flotation product and a receiving chamber. The feed pipe for the input part of the multiphase mixture is installed with the possibility of horizontal input normally upward flow of another part of the multiphase mixture supplied through the input pipe in the flotation cell. When this feed pipe is made in the form of paired nozzles input part of the feed stream of the multiphase mixture.

The disadvantages of the known structures are complexity in manufacturing, a large number of structural elements (in the first case - rods, in the second - partitions), which complicates preventive maintenance of devices and, therefore, reduces their performance and reliability in general, and also increases the consumption of materials and the cost of devices .

The task, which is aimed at solving the claimed technical solution is to increase reliability, reduce material consumption and expand the functional properties of the device.

The technical result is to simplify the design, as well as the ability to clean liquids with different sizes of impurities.

The problem is solved, and the technical result is achieved by the fact that in a liquid degasser containing a body divided by a partition into intercommunicating chambers and settling zones, nozzles of the mixture inlet, a nozzle for liquid withdrawal, according to the technical solution, in each of the chambers in the upper part of the body along its end faces and a side wall is fitted with a curved pipe with integrated flow dividers and with sipe-shaped horizontally oriented openings in its lower part, communicating with the corresponding nozzle water mixture, and in one of the chambers installed pipe with slit-like vertically oriented holes, communicating with the outlet liquid, installed in the lower part of the body, while in the lower part of the body is also installed auditing hatch with access to cameras and settling zones formed by a partition, made perforated. Moreover, the housing is mounted on the supporting elements and contains fastening elements.

Additional differences of the proposed technical solution:

- the outlet pipe of the liquid is equipped with a shut-off valve;

- the flow dividers are made in the form of plates and are located in each arm of the bent pipe at a distance of 200 mm from each other;

- along the side wall of the housing there is an observation deck;

- in the perforated partition, the holes are located above the level of the settling zones.

The essence of the utility model is illustrated by the drawings:

- in fig. 1 shows a liquid degasser, a general view;

- in fig. 2 - liquid degasser, top view;

- in fig. 3 shows section A-A in FIG. 2

The drawings show the following structural elements of the device:

1 - case;

2 - partition;

3, 4 - cameras;

5, 6 - settling zones;

7, 8 - end walls of the housing 1;

9, 10 - side walls of the housing 1;

11, 12 - curved pipes;

13 - the flow divider;

14 - openings of pipes 11, 12;

15, 16 - mix inlet connections;

17 - pipe;

18 - openings of pipe 17;

19 - pipe outlet fluid;

20 - stopcock;

21 - inspection hatch;

22 - supporting elements;

23 - fasteners;

24 - observation deck;

25 - openings of the septum 2.

The liquid degasser contains a rectangular case 1 of 2300 × 1900 mm in size, divided by a partition 2 to form communicating chambers 3, 4 and settling zones 5, 6. Chamber 3 is a coarse chamber, and chamber 4 is a fine chamber. The partition 2 is made perforated with slit-like vertically oriented holes 25, 2 mm wide and 100 mm long, located above the level of the settling zones 5 and 6. The partition 2 divides the device into chambers and also acts as a filter to coarse the slurry of the mixture and reduces its flow rate , providing additional gas separation and precipitation of impurities in the settling zone 5 and its flow from the coarse chamber 3 into the fine cleaning chamber 4. The location of the holes 25 in the partition 2 above the level of settling zones 5 and 6 provides for the deposition of particles of impurities during the passage of the mixture through the chambers 3, 4.

In the chamber 3, in the upper part of the housing 1, along its end wall 7 and the side wall 9, a curved pipe 11 is installed up to the partition wall 2 with slit-like horizontally oriented openings 14 made in its lower part 3 mm wide and 100 m long.

In the chamber 4, in the upper part of the housing 1, along its end wall 8 and the side wall 9, a curved pipe 12 is installed up to the partition wall 2 with slit-like horizontally oriented openings 14 made in its lower part 3 mm wide and 100 m long.

Holes 14 are used to destroy the structure of the mixture when it enters the chamber 3 and / or 4.

The pipe 11 communicates with the mixture inlet port 15 located on the side wall 9 in the upper part of the housing 1 at the end wall 7. And the pipe 12 communicates with the mixture inlet pipe 16 located on the side wall 9 in the upper part of the housing 1 at the end wall 8. On The nozzle 15 for introducing the mixture has a fitting for receiving the mixture through the drilling sleeve. On the nozzle 16 of the mixture is installed quick-release connection (BRS), allowing you to attach equipment through which the mixture enters the device.

In the pipes 11 and 12 with a diameter of 114 mm, flow dividers 13 are integrated (Fig. 3), which enhances the destruction of the flow structure and, as a result, has a positive effect on the acceleration of passive degassing of the mixture. The flow dividers 13 are made in the form of plates with a thickness of 2 mm and a size of 50 × 120 and are located in each arm of the bent pipes 11 and 12 at a distance of 200 mm from each other.

In the chamber 4 along the side wall 10 of the housing 1 there is installed a pipe 17 with a diameter of 146 mm with slit-like vertically oriented holes 18, communicating with a liquid outlet 19, mounted on the side wall 10 in the lower part of the housing 1. The liquid outlet 19 is equipped with a shut-off valve 20 designed to control the flow of fluid, and a combined choke 75/100 for connection with drilling hoses of various diameters.

In the side wall 10 in the lower part of the housing 1 there is a revision hatch 21 located in such a way that opening its cover (not shown) allows access to the chambers 3, 4 and settling zones 5, 6 for visual inspection and cleaning them from sludge.

The housing 1 is mounted on the supporting elements 22 and contains the fastening elements 23.

The supporting elements 22 are made, for example, in the form of several interconnected pipes placed at the end walls 7 and 8 of the housing 1.

The fastening elements 23 are made, for example, in the form of mounting loops rigidly attached to the walls of the housing 1.

Along the side wall 9 of the housing 1, an observation platform 24 is installed for personnel access when performing various maintenance works on the degasser.

The degasser fluid works as follows.

Before killing the well bore, the wellhead is tied up and the blowout equipment of the killing and throttling units is installed. The pipe 16 of the input mixture of the liquid degasser is connected through the BSU to the throttling unit. The pipe 19 of the liquid outlet through the combined fitting is connected to the pump unit CA-320 and, if necessary, with an additional working capacity (depending on the volume of the washing liquid).

In the process of killing, the flushing fluid pumped into circulation into the tubular space of the well leaves through the annulus and is directed through the pipe 16 to enter the mixture into the pipe 12, where, when exposed to flow dividers 13 at an angle to the wall of the pipe 12, and the holes 14, its passive occurs degassing and purification from impurities. From the holes 14 of the pipe 12, the washing liquid flows into the chamber 4, in which small particles of impurity settle in the settling zone 6. Next, the washing liquid under the influence of the pump unit CA-320 flows through the holes 18 into the pipe 17, undergoing additional filtration and degassing, and an already cleaned flushing fluid is fed back through the nozzle 19 of the liquid to the well (into the tube space) for circulation. In the case of tying a liquid degasser with an additional working capacity, the flushing liquid cleared of gas and impurities is sent to the latter.

When performing various technological operations in the wellbore - destruction of the cement cement bridges, cutting out a section of the production string in the productive zone where there is a possibility of gas from the formation and large impurities in the flushing fluid that the fluid degasser is bound to the following:

The fitting nozzle 15 of the mixture is tied with the annular space of the well through the wellhead (flushing) funnel using a drilling sleeve. In turn, the fitting of the nozzle 19 of the liquid outlet is tied with an additional working capacity or directly with the pump unit CA-320 for collecting the purified washing liquid. From the drilling hose, the flushing fluid is fed through a pipe 15 to enter the mixture into pipe 11, where, when exposed to flow dividers 13 at an angle to the wall of pipe 11, and holes 14, its passive degassing and primary purification from impurities takes place. From the pipe 11, the washing liquid enters the chamber 3 and through the openings 25 of the partition 2 flows into the chamber 4. This reduces the flow rate of the liquid, retains large particles of impurities that settle in the settling zone 5 in the chamber 3, and additional gas evolution occurs. Next, the washing liquid under the influence of the pump unit CA-320 passes through the openings 18 of the pipe 17, while undergoing additional filtration and degassing, in the chamber 4 small particles of impurity, such as sand, dirt, etc., settle in the settling zone 6.

Thus, the device is simple to manufacture and reliable in operation, with enhanced functionality, allows cleaning of the washing liquid with different content of impurities, directing its flow, depending on the degree of contamination and gas pollution in the chamber 3 or in the chamber 4. At the same time the washing liquid in the device, flowing through the slit-like holes 14, 25 of pipes 11, 12, 17 and partitions 2 is subjected to passive degassing and purification from impurities, and the purified flushing fluid flows back into the well and subsequent washing cycle. The inspection hatch 21, its location relative to the structural elements of the device, and the observation deck 24 allow for prompt maintenance and repair work.

The proposed solution ensures the safe implementation of a complex of works on the underground repair of wells and minimizing the risk of complications due to the natural saturation of the washing liquid with gas.

1. Patent RU 113976 U1, publ. 03/10/2012;

2. Patent RU 145055 U1, publ. 09/10/2014.

Claims (4)

1. Liquid degasser, comprising a housing divided by a partition into intercommunicating chambers and settling zones, nozzles for introducing the mixture, fluid outlet nozzle, characterized in that in each of the chambers in the upper part of the hull a curved pipe with integrated flow dividers is installed along its end and side walls and with slit-like horizontally oriented openings made in its lower part, communicating with the mixture input pipe corresponding to it, and a pipe with a slit-like vertically oriented orientation is installed in one of the chambers annymi openings communicating with the output fluid nozzle mounted in the bottom of the housing, the septum is perforated. 2. Liquid degasser according to Claim. 1, characterized in that the liquid outlet pipe is equipped with a shut-off valve. 3. The liquid degasser according to claim 1, characterized in that the flow dividers are made in the form of plates and are located in each arm of the bent pipe at a distance of 200 mm from each other. 4. The liquid degasser according to claim 1, characterized in that the holes in the perforated partition are located above the level of the settling zones.

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