RU48371U1 - DEVICE FOR PREPARING THE MIXTURE - Google Patents

Abstract

Known placed on a self-propelled chassis unit for preparing a mixture with two parallel-connected two-phase mixer pumps with a drive, autonomous intake lines of the mixture components with two discharge lines, respectively, connected to a common discharge line. However, in the specified device in the discharge line in the confluence zone of the flows of the components of the mixture there is uneven hydraulic resistance acting on the mixer pumps, and at a high concentration of the granular component in the mixture, the discharge line is blocked by one of the mixing pumps, which leads to a sharp decrease in the performance of the unit in whole. In the proposed device for preparing a mixture containing a two-phase pump-mixer, a supply line for liquid and granular components of the mixture and a delivery line to exit the mixture, a discharge pump with a drive is installed in series between the mixer pump and the delivery line. In the proposed device, a two-phase pump-mixer doses and mixes the components, and the discharge pump provides the optimal pressure of the prepared mixture in the discharge line.

Description

The proposed utility model, “A device for preparing a mixture”, placed on a self-propelled chassis, relates to the field of devices used mainly in the oil and gas industry for the preparation of solutions and mixtures pumped into the bottom-hole zones to increase well productivity.

Known placed on a self-propelled chassis unit for preparing the mixture, containing a two-phase pump-mixer with a drive, a supply line for the components of the mixture with devices for adjusting their supply and a discharge line.

Also known is a unit mounted on a self-propelled chassis for preparing a mixture with two parallel-connected two-phase mixer pumps with a drive, autonomous intake lines of the mixture components with two discharge lines, respectively, connected to a common discharge line. The specified unit is considered as the closest analogue of the claimed utility model. Information about the closest analogue given in the “Operation manual for the APS-6 mixture preparation unit”, FSUE “Design Bureau of Chemical Automation”, Voronezh, 2001, is attached to the application materials in the form of a photocopy.

However, in the specified device in the discharge line in the confluence zone of the flows of the components of the mixture there is uneven hydraulic resistance acting on the mixer pumps, and at a high concentration of the granular component in the mixture, the discharge line is blocked by one of the mixing pumps, which leads to a sharp decrease in the performance of the unit in whole. In addition, in the specified device, the mixer pumps serve not only to mix the components of the mixture, but also

to create the required pressure in the discharge line, which leads to the need to increase the power of the drives, and the latter causes difficulties in the power supply of the unit and a decrease in the efficiency of the device. In addition, it is difficult to place the unit on a self-propelled chassis in a confined space.

The aim of the proposed technical solution is to increase the productivity of the unit for preparing the mixture in conditions of high concentration of the granular component in the mixture, as well as optimizing the layout solution when placing the device on the chassis of a serial car.

This goal is achieved due to the fact that the device for preparing the mixture containing a two-phase pump-mixer, the supply line for liquid and granular components of the mixture and the discharge line for the output of the mixture, is equipped with a discharge pump with a drive installed in series between the mixer pump and the discharge line.

The proposed utility model is presented in figure 1.

In the proposed device, a two-phase pump-mixer doses and mixes the components, ensuring optimal pressure of the prepared mixture in the discharge line. An increase in the mixture pressure to the operating value is ensured by a pressurized pump with a drive installed in series with the mixer pump. The sequential placement of the mixer pump and the discharge pump between the intake and the discharge lines eliminates the clogging of the discharge line by the bulk component due to the exclusion of the zone of intersection of the component flows, provides the possibility of independent adjustment of the mixture pressure and concentration of the bulk component, reduces the total length of the intake and discharge lines, which allows optimizing the layout solution when placing the device on a self-propelled chassis. In addition, a reduction in the power spent on the pump drive is provided.

A device for preparing the mixture contains a line 1 for supplying liquid, a line 2 for supplying a granular component (proppant),

a two-phase mixer pump 3 with a drive and a device for regulating the flow of granular component (proppant), a sequentially installed discharge pump 4, a discharge line 5.

The device operates as follows. On line 1, the liquid component of the mixture and on line 2, the dosed bulk component (proppant) is fed into the switched on two-phase pump-mixer 3, from where the resulting mixture enters the discharge pump 4, installed in series with the pump-mixer 3, and from it to the discharge line 5 The required operating mode of the mixture preparation device is established by independently adjusting the rotational speed of the drive of the two-phase mixer pump 3 and the discharge pump 4, which ensures the necessary pressure and flow rate of the mixture in the discharge line 5.

Claims (1)

A device for preparing a mixture containing a two-phase pump-mixer, supply lines for the components of the mixture, for example, liquid and granular, and a discharge line, characterized in that it is equipped with a discharge pump with a drive installed in series between the mixer pump and the discharge line.