RU15359U1 - DEVICE FOR DOSED FEEDING OF CHEMICAL REAGENTS IN A WELL - Google Patents

Abstract

A device for the dosed supply of chemical reagents into the well, including a housing with a nozzle inside it with a metering head at the top, made with a through hole along the axis of the head and a radial channel located below, the housing and the nozzle form an annular space in communication with the well, the housing in the lower part being connected with a container for a reagent, characterized in that it is equipped with a trap of mechanical particles in the form of a pipe with a blank partition connected to the housing in the upper part, and the tank for the reagent full of material with positive buoyancy.

Description

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.Object device

Device for dosed supply of chemical reagents to an intern

The device relates to the oil and gas industry and is designed to ensure uniform supply of water-insoluble reagents when operating wells in any way with the aim of preventing the formation of oil-water emulsions, paraffin deposits in wells and oilfield equipment, and improving the rheological properties of oil. The preferred field of application is wells operated by centrifugal pumps.

A well-known dispenser is known, including a chamber located under the reagent container, hydraulically connected to a container and a cylinder concentrically installed in it, the cavities of which communicate with the well space. It is equipped with a flow regulator, filled in the form of a spring-loaded piston with a pin (1) exchanged in the lower part of the cylinder.

The disadvantages of the dispenser include the complexity of the design and low reliability in operation, due to the presence of accurate parts such as spring and norshen.

The closest technical one to the proposed one is a device for the dosed supply of chemical reagents into the well, it contains1, its body with a tube inside with a metering head at the top made with a groove hole on the axis of the head and a radial channel located below, the body and tube form an annular space, communicating with the well. The housing in the lower part is connected to the tank for the reagent, which is used as tubing (2).

The indicated device is not intended for use in wells operated by sucker rod pumps. If you use it complete with a centrifugal pump, it will lead to negative results. The fact is that tubing filled with reagent and amounting to tens, and sometimes hundreds of meters, represent

about g 9

MKIE21 V 43/00

a significant load and their suspension to the ESP can lead to damage to the pump. The way out can be a preliminary descent of the device to the bottom of the well, but this is due to additional tripping and lifting operations and, consequently, delaying additional financial resources and time.

The objective of the proposed technical solution is to expand the functionality and save material resources and time.

The specified task is eliminated by the proposed device, comprising a housing with a nozzle inside it with a dosing head at the top, made with a bore but the axis of the head and positioned with a radial channel, the housing and the nozzle form an annular space in communication with the well, the housing in the lower part being connected to the tank for reagent.

What is new is that it is equipped with a mechanical crusher of mechanical particles in the form of a branch pipe with a blank partition connected to the housing in the upper part, and the reagent tank is made of material with a negative head of the guesthouse.

In FIG. shows a longitudinal section of the proposed device.

It consists of a housing 1, inside which a nozzle 3 is mounted concentrically on the nozzle 2 with a dosing head 4 p of the upper part, in which calibrated holes 5 are made on the axis of the head and how much lower is its calibrated radial channel 6. Housing 1 and naipy6oK 3 form an annular space 7 communicating through slots 8 with the well.

With the lower part of the housing 1 is connected: and the container for the reagent 9, made of a more durable brand of low-pressure polyethylene (PND-273-79). Polyethylene pipes are connected to each other by couplings on the thread. The outer diameter of the pipes is 102 mm, the outer diameter of the coupling is 122 mm, the capacity is 1 linear meter. meters - 5 l, the specific gravity of the pipe material is 0.93 g / cm.

A mechanical particle trap is attached to the upper part of the housing, consisting of a nozzle 10 with a blank partition P. A plug 12 with a stopper 13 is installed in the lower part of the reagent tank 9.

Before the device is lowered into the well, the calculated volume of the reagent with a specific gravity of 0.8-0.9 g / cm (Daufax, Disolvan 4490, KhT-48, SNPKh-7523, deprac, etc.) is poured into the tank 9. the volume of the tank 9 is taken so that the amount of reagent is sufficient until the next underground repair of the well, in which it is refilled with reagent.

they are installed in the required well borehole, Oil fluid (oil with water) enters through slots 8 into the BHjTpb device, where preliminary separation of water from oil takes place. Water, accumulating in the annular space 7, rises and flows over the drip through the drip 6 into the pipe 3 and then into the tank 9, while pushing the corresponding volume of the reagent through the hole 5 up towards the pump. The diameters of the hole 5 are taken in the range of 1-1.5 mm, and the rope b is in the range of 2-2.5 mm and they depend on the viscosity of the reagent, its flow rate, depending on the flow rate of the well. The height distance from hole 5 to channel b is determined experimentally for each individual case and it depends on the quantity of reagent and associated water produced, the flow rate of the well, etc.

The use of a reagent container made of a material with positive buoyancy makes it possible to suspend it from a centrifugal pump, but this eliminates the additional load on the Naeos, since a tank with a reagent with a specific gravity of 0.8-0.9 g / cm practically floats in the well fluid, in which a significant amount of produced water with a high specific gravity.

The use of traps for mechanical particles eliminates their entry into the device and thereby increases its operational reliability.

User Information

1.A.S. No. 794195, MKI E21 B 43/00, 1981 (analogue)

2. Patent No. 649832, MKI E21 B 43/00, 1979 (prototype) Head of the sector of creation and development of industrial property,., - V.I. Kostrach

Claims (1)

A device for the dosed supply of chemical reagents into the well, including a housing with a nozzle inside it with a metering head at the top, made with a through hole along the axis of the head and a radial channel located below, the housing and the nozzle form an annular space in communication with the well, the housing in the lower part being connected with a container for the reagent, characterized in that it is equipped with a trap of mechanical particles in the form of a pipe with a blank partition connected to the housing in the upper part, and the container for the reagent full of material with positive buoyancy.