SU1097778A1 - Deep-well agent metering-out device - Google Patents

Abstract

1. REAGENT BELLING DETECTOR containing a reagent container, a piston mechanism with a connecting unit and a dosing element with filter material placed in the lower part of the container, characterized in that, in order to increase reliability and simplify the design, the piston mechanism is designed as a self-sealing cuffs mounted in series on the connecting node, the latter being made with a stepped outer surface and having axial and radial channels through which the cuffs are hydraulically associated with each other and with the reagent container. 2. A dispenser according to claim 1, characterized in that quartz sand thermally processed and modified with liquid glass is used as the filtering material. CO oo

Description

The invention relates to the oil and gas industry and can be widely used in the oil and gas fields of the country, where the chemical dosage of the well is carried out to combat paraffin-resinous deposits, oil-water emulsions, corrosion and scaling.

A borehole reagent dispenser is known, which includes a reagent container and a filter interconnected, in which the reagent is supplied with a specific mass of a mass, and the mass is transferred into the reagent container using gravitational forces.

The disadvantage of this dispenser is low reliability of operation due to reagent leaks between the housing and the piston.

Closest to the proposed technical essence and the achieved result is a downhole reagent dispenser containing a container for the reagent, a sandstone mechanism with a connecting unit and a dosing element with filter material placed in the lower part of the container 1.

A disadvantage of the known dispenser is that the shreds consisting of a flat rubber ring, tightly worn on the metal rod, do not provide a good sealing of the reagent container due to leaks observed in the gaps of the powder container.

Moreover, the leakage data increases with the passage of the slurry through the container pipe during the operation of the dispenser due to rubber abrasion and increased gaps.

In addition, the dosing element — a pipe with a filtering material — quartz sand. M changes its permeability due to deformation and leaching of small diameter fractions during the operation of the metering unit and washing of the wells, which makes calibration of the metering unit difficult.

The purpose of the invention is to increase the reliability of the dispenser and simplify its design.

This goal is achieved in that in a downhole reagent dispenser containing a reagent container, a piston mechanism with a connecting unit and a dosing element with filter material placed in the lower part of the container, the piston mechanism is made in the form of self-sealing cuffs installed in series on the connecting unit the latter is made with a stepped outer surface and has axial and radial channels through which the cuffs are hydraulically connected with each other and with the container for the agent.

In addition, quartz sand thermally processed and modified with liquid glass is used as a filtering material.

The drawing shows a diagram of a piston dispenser.

The dispenser consists of a filter 1, a load 2, a piston mechanism 3, a reagent container 4, a metering element 5, a plug with openings for the exit of reagent 6 and a connecting unit 7 with axial 8 and 9 radial channels.

The piston mechanism, in turn, includes a plug 10, self-sealing rubber cuffs 11, a tip with a hole 12, and a filtering material 13.

The filter material 13 is a tamped mixture of silica sand with a fraction of 0.5-1.2 mm with liquid glass, heat treated at 500-700-C. This manufacturing method allows to obtain durable samples of a porous medium with a given permeability. After the dosing element is manufactured, the permeability is refined, which serves as a marking indicator in the choice of cargo to establish the required flow rate.

The dispenser is mounted with the following rhinestone.

A reagent (paraffin inhibitor, demulsifier, etc.) is poured into a container 4 consisting of pipes connected by couplings, a piston mechanism 3 and a load 2 are inserted into the upper tube of the container. Next, a filter 1 is attached to the upper tube of the container perforated pump no-compressor tube)., which connects the metering device to the submersible pump iriem and the pipe pump to pass the well Zh1, px) rm and the dosed reagent to receive

LIPS: | 1OHO iiaCOCHK lower hour1 h-1 container contains the dose of dosage unit 5.

The dispenser works as follows. Cargo 2, which is located on the piston mechanism 3, creates excessive lavage on the liquid (reagent), is 11.y;

0 4). The reagent under the action of excess pressure is iciiiin filtered through the dosing element 5, mixtures 1; it is supplied with the well fluid and is fed to the intake of a submersible pump.

Taking into account that the internal cavity of the piston mechanism is filled with reagent and hydraulically connected with the sub-piston space, the excess pressure developed by the load acts on the cuffs, expands them and presses tightly against the internal walls of the container tubes. Such self-sealing ensures reliable tightness, eliminates reagent gaps in the gaps between rubber cuffs and tubing (container). Using Multiple (2-3)

5 or more p-: hydraulically connected rubber mats-1zt significantly increases the reliability, sealing, as the pressure drop between the inner cavity of the container and the borehole space is distributed over several cuffs.

It should be noted that with increasing pressure on the piston element, tightness increases.

The proposed design of the piston mechanism does not threaten the possible abrasion of the rubber of the cuff during the operation of the dispenser, since it does not lead to depressurization of the container, the excessive internal pressure of the reagent constantly presses the rubber of the piston element to the walls of the container. The observance of the prescribed dosage schedule is also ensured by the use of a stable dosage element that retains its filtration properties throughout the entire period of operation of the dispenser.

The proposed design is simple, reliable in operation, provides a stable and accurate dosage of the reagent.

The application of the proposed metering unit allows to increase the inter-treatment period of production wells from 30 to 150-180 days.

Claims (2)

1. Borehole Dispenser REAGENT containing a container for the reagent, a piston mechanism with a connecting unit and a metering element with filter material located in the lower part of the container, characterized in that, in order to improve reliability and simplify the design, the piston mechanism is made in the form of self-sealing cuffs installed in series on the connecting node, the latter being made with a stepped outer surface and has axial and radial channels through which the cuffs are hydraulically connected to each other and to the a reagent tuner. 2. Dispenser according to π. 1, characterized in that as the filter material is used heat-treated and modified with liquid glass silica sand. ί