SU1254141A1 - Apparatus for metered feed of chemical agent into oil well - Google Patents

Description

The invention relates to the oil producing industry, in particular, to deep-hole devices for metering the supply of reagent to oil wells in order to prevent equipment corrosion, deposition of paraffin wax and salts, formation of stable emulsions of oil and water.

A device for dispensing a x and a hydrogen agent into an oil well is known, which contains a container of a reagent in the form of a pipe string, a dispenser in the form of a deep metering pump Llj.

The disadvantage of this device is the complexity of the design and unreliability due to the presence of bypass pipe fittings, pistons, springs.

The closest technical solution to the present invention is a device for metered delivery of chemical reagent into an oil well, containing a Conte Chner for a chemical reagent with nozzles for inletting the production of a well and discharging a chemical reagent and a site for controlling the chemical reagent 2 J,

A disadvantage of this device is that viscosity, density, solubility, and emulsifying ability of the reagent in relation to the production of a well affect the accuracy of the control of the flow. In the radial hole of the internal branch pipe, the foduction of SLE; the zhina freely contact with the reagent, which leads to an unregulated flow of reagent through the upper part of this hole,

The aim of the invention is to improve the reliability of operation and the accuracy of dosing at low costs.

The goal is achieved by the fact that in a device for dispensing chemical reagent into an oil well, containing a container for a chemical reagent with nozzles for letting in the production of a well and discharging a chemical and a chemical flow control unit, the latter is equipped with a wick and is designed as a chamber with a capacity of water separation in which a nozzle is installed for inlet production of the well, and the chambers are connected through a water seal and a water separation tank with a well, with one end of the wick placed in

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: the chamber and the other in the inlet for the production of a well.

The drawing schematically shows the device.

The reagent container 1 dp is equipped with nozzles 2 and 3 for the inlet of the production of the well and the release of the reagent. On the upper part of the nozzle 2 for the inlet of the production of a well, a flow regulator is installed, consisting of a chamber 4 with a lid 5 placed in the chamber 4 of the wick 6, and connected to the chamber of the container 7 for separating water from the well production. The wick 6 is partially introduced into the nozzle 2. Between the chamber 4 and its lid 5 there is a hydraulic shutter 8, which ensures the flow of water from the tank 7 to the chamber 4 and prevents the ingress of gas (air) from the chamber 4 to the tank 7, capacity 7 above, has threads for connection to the filter 9 of the submersible pump 10.

The pipe 3 for discharging the reagent is installed so that its ends are at different levels, forming a hydraulic seal, which prevents water from flowing by gravity from the well into container 1.

Before lowering into the well, a portion of water is poured into the container, the volume of which is equal to the internal volume of the nozzle 2. Then the container is filled with reagent. In this case, the pipe 2 is partially filled with water, -. displaced from the container under the pressure of the reagent. A wick 6 is partially introduced into the upper part of the nozzle 2; its throughput is equal to the required reagent consumption. More than half of the wick should sag outside. The container 7 is filled with water, which the particle flows through the hydraulic lock 8 into the chamber 4, compressing the air in it. Capacity 7 is attached to the filter 9 of the submersible pump and together with it the whole device is lowered to the required depth.

As it descends, the hydrostatic pressure in the well rises and the water from the tank 7 flows into the gauge 4, compressing the air. Due to the fact that the density of the reagent is less than the density of water, the water level in nozzle 2 is lower than its level in chamber 4. The volume of chamber 4 is such that when air is maximally compressed, the water level in chamber 4 is lower than the upper edge of nozzle 2 and it cannot be transported

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bladder flow from chamber 4 to branch pipe 2. Water only wets wick 6 and under the action of capillary forces enters pipe 2 and then into container 1, displacing, accordingly, the amount of reagent from the container through pipe 3 into the well. The flow of water from chamber 4 to container 1 through the wick 6 continues until the reagent is completely expelled from the container and the water levels in chamber 4 and pipe 2 are level. Water flows to chamber 4 through the hydraulic lock from tank 7, where it is separated from the production of the well,

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passing through the filter 9 submersible pump 10.

When the pump 10 operation mode is established, the hydrostatic pressure in the well, therefore, the water level in chamber 4 is within small limits, which ensures the constant flow of water through the filter 6 and the reagent through the nozzle

The application of the proposed device allows to increase the reliability and accuracy of the dosing of the reagent without the use of expensive and inconvenient ground installations at low costs.

Claims (1)

A DEVICE FOR THE DOSED CHEMICAL REAGENT FEEDING IN AN OIL WELL containing a container for a chemical reagent with nozzles for inlet of a well production and release of a chemical reagent and a unit for controlling the flow rate of the chemical reagent, characterized in that, in order to increase the reliability of operation and the accuracy of dosing at low costs, the unit for controlling the flow of a chemical reagent is equipped with a wick and is made in the form of a chamber having a tank of sludge in which a nozzle is installed for inlet of well production, the chamber being communicated through a water seal and a capacitor water sludge with the well, with one end of the wick placed in the chamber, and the other in the pipe for the inlet of the production of the well. ! i ί