RU2133913C1 - Device for dosage of reagent to oil pipe-line - Google Patents

Abstract

FIELD: oil industry, applicable at production and conveying of oil over pipe-lines. SUBSTANCE: the upper part of the device container communicates with a gas collector in the oil pipe-line through a gas conduit furnished with an actuator valve. Metered supply of reagent to the container is effected due to the pressure head of reagent in the container at equalization of pressure in the container and oil pipe-line. EFFECT: enhanced reliability of supply of reagent in any section of oil pipe-line with lowest capital and operating investment. 1 dwg

Description

 The invention relates to the oil industry and can be used in the extraction and transportation of oil through pipelines.

 To increase the efficiency of oil production and transportation, various reagents are used and introduced at different parts of the oil collection system.

 Known dosing plants of the BR type (Safin V.A., Mindryukov V.M., Shinkarev S.A. Technology and technical means of chemicalization of oil production processes. - M .: VNIIOENG, 1985, p. 27). The installation includes a reagent tank, a tubular electric heater, a metering electric pump unit, a gear pump, and monitoring and control equipment. The disadvantages of installations such as BR are cumbersome, metal, uneconomical in energy consumption, do not allow dosing at low feed reagent.

 Simpler and cheaper dosing devices of hydrostatic action are known (Safin V.A., Mindryukov V.M., Shinkarev S.A. Technology and technical means of chemicalization of oil production processes. - M .: VNIIOENG, 1985, p. 38). Such a device includes a container with a reagent, which is connected with the annulus of the well, and the reagent is dosed into the annulus due to the replacement of the reagent with gas from the annulus of the well. In this case, the dosing device works like a dropper under the action of the gravity of the reagent. The use of such a device is limited only to the area near the wellhead.

 In order to increase reliability, simplify the design, expand the scope, reduce energy costs in a known device containing a reagent container, nozzles for dosing and filling the reagent, the upper part of the container is connected to the gas collector of the oil pipeline by a gas pipeline, and the lower part of the container is connected to the oil pipeline by a pipe equipped with control valve.

 Such a technical solution makes it possible to ensure the dosage of the reagent in any section of the pipeline through which oil with free gas content is transported under the operating conditions of the pipeline. At the same time, the reliability of the device for dosing the reagent increases, operating and capital costs for dosing the reagent are reduced.

 The drawing shows the proposed device.

 The device includes an oil pipeline 1, a gas collector 2, a gas pipeline 3 with a valve 4, a container for reagent 5, a pipe 6 with a control valve 7, a pipe 8 with a valve 9 for refueling, a level gauge 10, control valves 11.

 The device is mounted and operates as follows.

 A container 5 for a reagent is installed on a selected section of the oil pipeline to supply any reagent, a gas collector 2 is mounted on the pipeline, which is connected by a gas pipeline 3 to a valve 4 by a container 5 for a reagent. The lower part of the reagent container is connected via a tube 5 and a control valve to the oil pipeline.

 After assembling the device according to the proposed scheme, the container is filled with the necessary reagent by pumping it through the pipe 8 with a valve 9. When oil moves through the oil pipeline 1, the contained free gas fills the gas collector 2, and the excess gas is carried away with the oil through the oil pipeline. When the valve 4 is opened, the accumulated gas through the gas pipeline 3 enters the upper part of the reagent container 5. In this case, the pressure in the oil pipeline and in the upper part of the container is equalized, and in the lower part of the container the pressure will be greater by the height of the column of reagent in the container. With the adjusted position of the control valve 7 through the tube 6, the reagent begins to flow into the oil pipeline due to the pressure of the height of the column of reagent in the container. The total value of this pressure is determined by the height of the reagent container from the pipeline. The end of the pipe 6 should reach the axis of the pipeline and end with a branch towards the movement of the oil flow, which will provide additional reagent suction into the pipeline due to flow ejection and rapid mixing of the reagent with oil. The reagent consumption is controlled by the level gauge 10 and the control valves 11 on the reagent container 5, and the presence of free gas is controlled by opening the control valve 11 on the gas collector. According to the results of determining the measurement of the level of the reagent in the container 5, the flow rate of the reagent is specified and, if necessary, is regulated by a control valve 7. If necessary, the container for the reagent is equipped with a heater.

 The proposed device allows without the use of a pump and a drive to dose the reagent in any section of the pipeline. In this case, the flow rate of the reagent is easily controlled using the control valve.

 Thus, a simple device allows the efficient use of various reagents in any section of the pipeline with low capital and operating costs.

Claims (1)

 A device for dispensing a reagent into an oil pipeline containing a container for reagent, nozzles for dispensing and filling the reagent, characterized in that the upper part of the container is connected to the gas collector on the oil pipeline by a gas pipeline, and the lower part of the container is connected to the oil pipeline by a pipe equipped with a control valve.