RU2320853C1 - Proportioning electric pumping unit - Google Patents

Abstract

FIELD: oil and gas production, particularly to supply liquid reagents in oil and gas wells.

SUBSTANCE: pumping unit comprises reagent vessel with filling neck and discharge orifice, metering pump connected to the vessel through valve by means of pipelines, fine filtering means installed upstream of sucking part of metering pump, level indicator, electrocontact manometer installed in pipeline, which supplies reagent in well through valve, shutoff valve and check valve. Fine filtering means is located out of vessel, is provided with heater and with level indicator. Coarse filter is mounted in neck.

EFFECT: increased operational reliability in different climatic conditions.

2 dwg

Description

The invention relates to the oil and gas industry, in particular to dosing units, and can be used for dosed supply of liquid reagents to oil and gas wells, process and main water and product pipelines.

A known installation for dispensing reagents in oil wells, containing a cylindrical tank for the reagent and a metering pump connected to the tank through pipelines through valves (SU No. 1611165, ЕВВ 43/00, 1991).

However, the known installation during operation is insufficiently effective and inconvenient technologically.

A known installation for dispensing chemical reagents, including a container for a reagent, a metering pump connected to the tank through a pipeline, a fine filtration device, a level gauge, an electric contact pressure gauge installed on the pipeline for supplying the reagent to the well, a shut-off valve and a check valve (RU 2238393, Е21В 37/06, 2004).

The disadvantage of this installation is that when operating in winter conditions, at low temperatures, the viscosity of the regent increases. This leads to clogging of the fine-meshed mesh in the fine filtration device and complicates the operation of the pump valves.

The closest in technical essence to the claimed known metering pump unit (UDE), including a tank (2) with a level gauge (3), metering pump unit (4), electric contact pressure gauge (5), suction (6) and discharge (7) pipelines, with valve (8). All equipment is closed by a casing (9) with a lockable door. The tank has a filter (10), a removable lid with a filler neck (11) and a drain valve (12). (Survey information “Oilfield business.” Technology and technical means for the chemicalization of oil production processes. Issue 16 (105), Moscow, 1985, p.24.25.)

A disadvantage of the known dosing unit is that when the unit is operated at low temperatures, increasing the viscosity of the regent decreases the reliability of the unit.

The objective of the invention is the creation of a metering pump installation, reliable in various climatic conditions.

The problem posed by the invention is solved in such a way that in a metering pump installation including a reagent tank with a filler neck and a drain hole, a metering pump connected to the tank through pipelines through a valve, a fine filter installed in front of the suction part of the metering pump, a level gauge, electrical contact pressure gauge installed through a valve on the pipeline for supplying reagent to the well, a shut-off valve and a non-return valve, a fine filter device is removed from the tank Is provided with a heater and on it is mounted the transmitter and in the neck for filling the reagent container installed in the coarse filter.

The heating of the fine filtering device during the operation of the installation provides the kinematic viscosity of the reagent necessary for operation in various climatic conditions of the pump, no more (8 cm ² / s). Heating a small volume of the reagent is provided by a heater with a small power consumption, does not require large energy costs, eliminates overheating of the reagent and a change in its properties.

The location of the fine filtration device with the level gauge installed on it allows you to divert gas bubbles in the reagent through the level gauge tube back into the tank, which improves the reliability of the metering pump.

The coarse filter installed in the filler neck reduces the need for frequent shutdown during the operation of the installation to clean the fine filtering device and remove the sediment that forms when impurities settle out of the reagent tank through the drain hole.

The invention is illustrated by the accompanying drawings, in which:

Figure 1 depicts a General view of the metering pump;

Figure 2 - functional diagram of the installation.

The metering pump installation according to the invention (FIG. 1) contains a reagent tank 2 mounted on the frame 1, a metering pump 3 connected to the tank through a valve 4, a fine filter 5 equipped with a heater 6 is installed directly in front of the pump 3, on the device of fine cleaning 5, a level gauge 7 is installed, an electric contact pressure gauge 9, a shut-off valve 10 and a check valve 11 are installed on the pipeline for supplying reagent to the well through a valve 8. The installation is equipped with a casing 12. Top part of the tank 2 there is a filler neck 13, inside of which a coarse filter 14 is installed, the neck 13 is closed by a cover 15. In the lower part of the tank 2 there is an opening for draining the reagent 16 residues, plugged with a stopper 17 (Figure 1).

The proposed installation works as follows (Figure 2).

The tank 2 installed on the frame 1 is filled with reagent through the filler neck 13 and the coarse filter 14 and closed by a cover 15. The reagent from the tank 2 through the valve 4 enters the fine filter 5, equipped with a heater 6 and into the level gauge 7, at minus temperatures, the heater 6 automatically it turns on and provides heating and a decrease in the viscosity of the reagent, the prepared reagent enters the pump 3. Since there is a short-term heating of a small amount of the reagent and the power consumption of the heater is small, then reagent overheating and changing its properties are turned off.

The pump 3 doses the reagent into the well along the injection line, on which an electric contact pressure gauge 9, a shut-off valve 10, and a check valve 11 are installed through valve 8 to prevent back flow of the reagent and well fluid in the absence of pressure created by the metering pump. After the end of the work, the reagent residues from the tank 2 are discharged through the hole 16, drowned by the plug 17 in the operating mode. All technological equipment is protected by a casing 12 (Figure 2).

The design of the fine filtration device 5 with the level gauge 7 installed on it allows the bubbles of gas in the reagent to be trapped and led through the tube of the level gauge 7 back to the installation tank 2, which improves the reliability and operation of the metering pump.

Claims (1)

A metering pump installation containing a reagent tank with a filler neck and a drain hole, a metering pump connected to the tank through pipelines through a valve, a fine filter installed in front of the suction portion of the metering pump, a level gauge, an electrical contact pressure gauge installed through the valve on the pipeline for supplying the reagent to the well, a shut-off valve and a check valve, characterized in that the fine filter device is removed from the tank, equipped with a heater and m installed transmitter, and in the neck for filling the reagent container installed in the coarse filter.

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