RU60610U1 - MOBILE INSTALLATION FOR PREPARATION AND PUMPING OF COMBINED GELEOSAD-FORMING SYSTEMS - Google Patents

Abstract

A mobile unit for the preparation and injection of combined gel-forming polymer systems into a well, having a filtration and supply system for process water, a dry polymer loading and dosing system, a liquid cross-linking loading and dosing system, a polymer solution preparation system, a high pressure pump, a ventilation system, and heating, control and monitoring system, a system for supplying liquid solutions and compositions to receive a high pressure pump from external tanks. The mixer tank is equipped with an electric mixer, preventing the deposition of polymer solution to the bottom during emergency and technological plant stops. The high pressure discharge pump system has a frequency converter for varying capacity.

Description

The utility model relates to equipment for the oil and gas industry and can be used for the preparation of combined gel-forming polymer systems with their subsequent injection into the well in order to increase oil and gas recovery and repair and insulation works.

A known installation for the preparation and injection of polymer solutions into the reservoir, having a storage hopper for dry polymer, a device for wetting and dissolving the polymer, a container for mechanically mixing and maturing the dissolved polymer, a device for diluting the polymer solution to the concentration obtained by the technology and pumping with a high pressure pump (Instruction manual for the installation for the preparation and injection of polymer solutions ”, Oil Machine-Building Plant at the Dagan Oil Administration, China, 1994 g.)

Such an installation is not mobile, and the flow of the solution into the formation is cyclical, this is due to the time it takes to prepare the solution, while the injected solution quickly loses its viscoelastic properties.

A utility model is known (Certificate No. 9887 of May 16, 1999) of a mobile unit for preparing and pumping polymer compositions, having a hopper with a screw feeder, a mixer tank, a polymer stapler loading and dosing system, a process water pipe with a mounted flow meter, and a regulating valve high pressure, jet device and non-return valve, electric pressure pump, ventilation system, electric heating and control panel.

The disadvantage of this utility model is the lack of speed control of the electric drive to change the performance of the high-pressure pump, as well as the deposition of polymer solution at the bottom of the tank-mixer during emergency and technological plant stops.

A utility model is also known (Certificate No. 14383 of July 20, 2000) of a mobile installation for preparing and injecting polymer compositions, having a solution supply system for a well, a filtering system and a process water supply system, a dry polymer loading and feeding system, a liquid loading and dosing system a stapler, a system for preparing and dispensing a polymer solution, a control and monitoring system.

A significant drawback of this utility model is the constant need for a tank with process water with a volume of at least 50 m ³ , which significantly complicates the operation of the installation in the autumn-winter period and increases the cost of the work performed.

The purpose of this utility model is to create an installation for the preparation and injection of multicomponent combined gel-forming polymer systems that solve more complex problems in the development of oil and gas fields, both in terms of increasing oil recovery, and during repair and insulation works.

This goal is achieved by the fact that a process flow diagram is proposed that allows for the continuous injection of five or more chemical components into the well.

The equipment of the installation is located in a heated van on a caravan chassis, has a filtration and supply system for process water, a dry polymer loading and dosing system, a liquid cross-linking solution loading and dosing system, a polymer solution preparation system, a high-pressure injection pump with a frequency converter for changing performance, a system for supplying liquid solutions and compositions to receive a high pressure pump from external containers, a ventilation and heating system, systems in management and control.

Figure 1 shows a mobile installation for the preparation and injection of combined gel precipitation polymer systems, comprising:

- van 1;

- chassis 2;

- a system for filtering and supplying process water 3;

- system of loading and dosing of dry polymer 4;

- a system for loading and dosing a liquid crosslinking solution 5;

- a system for preparing a polymer solution 6;

- a system of a pressure pump 7;

- a system for supplying liquid solutions and compositions from external containers 8;

- heating system 9;

- ventilation system 10;

- management and control system 11.

Preparation for the injection of solutions and compositions into the well as follows: process water enters the installation through the filtration system 3 from the reservoir to maintain reservoir pressure through the jet apparatus 12 into the mixer tank,

equipped with a mixer-mixer with an electric drive 13, preventing the deposition of polymer solution during emergency and technological plant stops. The dry polymer is fed from the system 4 to the mixing tank 6 through the jet apparatus 12. Next, the polymer suspension enters the high pressure pump system 7. At the same time, a liquid crosslinking solution is fed from the system 5 to the high pressure pump, which is mixed with the polymer suspension is pumped into the well. By closing the valve 14 and opening the valve 15, liquid gel precipitating solutions and compositions in a certain concentration and volume are supplied alternately by the centrifugal pump 8 to the intake of the high pressure pump 7.

The control and monitoring system of the installation allows for the preparation and injection of combined gel precipitation systems in automatic and manual modes.

Claims (3)

1. Mobile installation for the preparation and injection of combined gel-forming polymer systems into a well, having a filtration and supply system for process water, a dry polymer loading and dosing system, a liquid cross-linking loading and dosing system, a polymer solution preparation system, a high-pressure pump, a system ventilation and heating, control and monitoring system, characterized in that the installation has a system for supplying liquid solutions and compositions to the pump who pressure from external tanks. 2. The mobile installation according to claim 1, characterized in that the mixer tank is equipped with an electric mixer, preventing the polymer solution from precipitating to the bottom during emergency and technological plant stops. 3. The mobile installation according to claim 1, characterized in that the high pressure pump system has a frequency converter for changing performance.