RU2260678C2 - Proportioning device - Google Patents

Abstract

FIELD: oil and gas production, particularly devices for dosing and supplying viscous chemical agents into oil- or gas pipeline or into well.

SUBSTANCE: device has vessel with chemical agent pipeline connected with oil pipeline, hydraulic resistance assembly made as connection pipe with porous medium installed in chemical agent pipeline. Porous medium is arranged in chamber defined by inner connection pipe surface and by discs having orifices put on hollow tube inside the connection pipe and forming inner and outer cavities in the connection pipe. Chemical reagent pipeline communicates with inlet cavity of the connection pipe. Hollow pipe communicates with outlet cavity by opened end thereof. One disc is installed on hollow tube so that disc may be displaced and fixed on the tube. Hollow tube is connected with oil pipeline.

EFFECT: improved operational conditions, increased ability of controllable chemical reagent supplying and reduced supplying time.

6 cl, 2 dwg

Description

The invention relates to the oil and gas industry, in particular to devices for the dosed supply of liquid reagents in oil, gas pipelines or wells.

A device for the dosed supply of liquid chemicals in the cavity of the pipeline, including a container for storing a chemical with a hollow drain reagent pipe and a means for supplying gas from the cavity of the pipeline to the tank for a chemical agent, the device is equipped with a chamber for accumulating gas installed under the tank, and the reagent pipe is made in the form knee and passed through a gas storage chamber. To regulate the dose of the chemical reagent, calibrated openings for gas and chemical reagent are provided (RF Patent 2074950 dated 10.03.97, bull. No. 7, IPC 6 E 21 V 43/00).

A disadvantage of the known device is the impossibility of an accurate dosage of viscous chemicals through a calibrated hole, as well as the unreliability of operation due to its clogging with mechanical impurities.

A well-known dosing device for viscous chemicals is known, including a tank with a reagent pipeline and a gas pipeline connected with the oil pipeline. The hydraulic resistance in the form of a pipe with flanges filled with a porous medium - sand was installed on the gas pipeline line (A.с. 987079, dated 07.01.87, bull. No. 1, IPC 3 E 21 V 43/00). Dosing is carried out through the reagent line using gas passing through the hydraulic resistance. This embodiment of the device allows to increase the flow area of the reagent line and to provide a stable supply of viscous liquids at any cost. The control accuracy is achieved both by changing the length and cross section of the nozzle, and by changing the permeability of the porous medium by selecting the fractional composition of sand, which is associated with stopping the device for replacing the nozzle or porous medium.

Thus, a disadvantage of the known device is the complexity and inconvenience of operation, as well as an increase in the regulation time associated with the replacement of hydraulic resistance.

The problem that the invention solves is to improve operating conditions, as well as simplify and reduce the time for regulating the dosed supply of viscous chemicals.

This problem is solved by the proposed dosing device, including a container with a reagent pipe connected to the oil pipe, and a hydraulic resistance in the form of a pipe with a porous medium, in which according to the invention hydraulic resistance is installed on the reagent pipe, and the porous medium is placed in a chamber formed by the inner surface of the pipe and disks with holes mounted on a hollow tube inside the pipe and forming the input and output cavities of the pipe, and the reagent conduit is in communication with the input floor Stu pipe, and the hollow tube with its open end - with a nozzle outlet cavity, with one of the discs is mounted on a hollow tube movably and fixing a hollow tube connected to the pipeline.

As a porous medium, both natural and artificial highly permeable fibrous and polymeric materials can be used. The pipe may be provided with flanges.

To move and fix the disk in the flanges, it is advisable to install the adjusting bolts.

At least two openings for the passage of a chemical reagent can be made in each of the disks of the chamber with a porous medium.

It is advisable to install a hydraulic pump on the reagent line.

The hydraulic resistance installed on the reagent line and made in the form of a chamber of variable volume, filled with, for example, fibrous material, allows you to change the permeability of this material by moving one of the disks and thereby increase or decrease the flow of a viscous chemical. There is no need to stop the operation of the device, since the adjustment is made with adjusting bolts. Also, the proposed design provides the supply of small doses of a chemical reagent (200-800 g / day).

Comparison with the prototype showed the presence of distinctive features, therefore, the proposed technical solution meets the criterion of "novelty."

A search by distinguishing features revealed a number of inventions - dosing devices based on the principle of operation of variable volume chambers, for example, US Pat. RF number 2142553, op. 12/10/99, bull. No. 34, IPC 6 E 21 B 37/06; US Pat. RF number 2046291, op. 10/20/95, bull. No. 29, IPC 6 G 01 F 11/04; A.S.No. 1530919, op. 12/23/89, bull. No. 47, IPC 4 G 01 F 11/02.

In known devices, dosing is carried out by moving the piston and squeezing the required amount of chemical reagent from the chamber of variable volume.

In the present invention, a different principle of operation is involved: they change the volume of the chamber with fibrous material by moving and fixing one of the disks and thereby change the permeability of the porous medium, which in turn allows, as necessary, to increase or decrease the dose of the chemical.

Based on the foregoing, we can conclude that the proposed invention meets the criterion of "inventive step".

Figure 1 shows a diagram of the proposed device, figure 2 is a hydraulic resistance, a longitudinal section.

The device contains a container for a chemical reagent 1, connected by a pump 2 with a reagent line 3, on the line of which a hydraulic resistance 4 is connected, connected with the oil pipeline 5.

The hydraulic resistance 4 includes a pipe 6, inside which a chamber 7 is formed, formed by the inner surface of the pipe and disks 8, 9 with holes 10. At least two openings are made in each disk for the passage of a chemical agent. The disks 8 and 9 are mounted on a hollow tube 11 located along the axis of the pipe 6, while the disk 8 is fixedly mounted and the disk 9 is movable along the hollow tube 11. In addition, the disk 9 is equipped with four adjusting bolts, consisting of the actual bolt 12 , fixing nuts 13 and washers 14. On one side, the pipe 6 is closed by a cover 15, on the other by flanges 16.17, fastened with six bolts 18, nuts 19 with washers 20. Disk 8 forms an inlet cavity 21 connected to reagent pipe 3 with pipe 6 and equipped with a plate 22, fitting 23, nut 24 and ball n ppelem 25. The disc 9 forms the outlet cavity 26 communicating with hollow tube 11 connected in turn to the pipeline 5. The chamber 7 is filled with hemp fibers. As the porous medium, fibrous and polymeric porous materials of high permeability of natural and artificial origin are used.

The proposed dosage device operates as follows. A viscous chemical reagent pump 2 through the reagent line 3 is fed into the hydraulic resistance 4, while the volume of the chamber 7 with hemp fibers using the disk 9 is pre-configured to supply the required amount of chemical reagent of a certain viscosity. The chemical enters the inlet cavity 21, then passes through the chamber 7, the outlet cavity 26, and through the hollow tube 11 enters the oil pipe 5. If necessary, for example, to increase the dose of the chemical reagent, the adjusting bolts 12 and fixing nuts 13 move the disk 9, increasing the chamber volume 7, this increases the permeability of hemp fibers and, accordingly, the amount of chemical passing through this fibrous filler.

The present invention is simple, reliable and convenient to operate, provides the supply of small doses of viscous chemicals and the continuity of the regulatory process.

Claims (6)

1. A dosing device comprising a container with a reagent pipe connected to the oil pipeline and a hydraulic resistance in the form of a pipe with a porous medium, characterized in that the hydraulic resistance is installed on the reagent pipe, and the porous medium is placed in a chamber formed by the inner surface of the pipe and disks with holes, mounted on a hollow tube inside the nozzle and forming the inlet and outlet cavities of the nozzle, and the reagent conduit is in communication with the inlet cavity of the nozzle, and the hollow tube with its open end ohm - with the outlet cavity of the pipe, while one of the disks is mounted on the hollow tube with the ability to move and fix, and the hollow tube is connected to the oil pipeline. 2. The dosing device according to claim 1, characterized in that fibrous and polymeric porous materials of high permeability of natural and artificial origin are used as the porous medium. 3. The dosing device according to claim 1, characterized in that the pipe is equipped with flanges. 4. The dosing device according to claim 3, characterized in that the adjusting bolts are installed in the flanges for moving and fixing the movable disk. 5. The dosing device according to claim 1, characterized in that at least two openings for the passage of the chemical agent are made in each disk. 6. The dosing device according to claim 1, characterized in that a hydraulic pump is installed on the reagent line.

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