RU117535U1 - PUMP UNIT FOR CLEANING WELLS - Google Patents

Abstract

A pumping unit for cleaning a well, including a submersible pump located in the well with a cavity sucking clean water and a water jet, installed above the submersible pump and connected to the outlet of the latter through a nozzle, while the suction cavity of the water jet pump through the suction pipeline provides contact with the water zone with suspensions, and The submersible pump is equipped with a casing that provides cooling by flushing the electric motor housing with a part of the water flow, characterized in that the pump unit for cleaning the well is additionally equipped with a screw pump hydraulic unit used as a hydraulic motor driven by a part of the water flow supplied through a pipeline with a flow regulator from the submersible pump, and a disc with disintegrating elements is connected to the hydraulic motor shaft.

Description

The utility model relates to the field of pump engineering and can be used for cleaning wells for water during exploration, water reduction during construction work, and groundwater intakes.

It is known that it is necessary to periodically clean water wells from particles deposited at the bottom that are carried out from an aquifer for various reasons or from precipitation from downhole pipes.

For example, airlift systems for raising rock from a well are known. They can be used to clean water wells when the level drops no more than 50% of the well depth, which does not meet the water requirements of the wells.

Known pumping unit for cleaning wells for water according to the utility model of the Russian Federation No. 22206 dated 03/10/2002, currently used at the Berezovsky water intake in Zheleznogorsk, Kursk Region. This unit includes a submersible pump and a water-jet pump located above the submersible and operating from the flow of water supplied by the submersible pump. The submersible and water-jet pumps supply water to the well without mechanical impurities or not more than 0.01% of them by weight of water. Most of the water enters the submersible pump, the rest goes to the bottom of the well, where the suction pipe of the water-jet pump is discharged. It washes the sediment at the bottom, and the resulting pulp enters the water jet pump and is discharged from the well along the pressure pipe along with the water pumped out by the submersible pump.

Closest to the claimed is a pumping unit for cleaning wells according to the patent for utility model of the Russian Federation No. 90504, published on 10.01.2010. This unit includes a submersible pump located in the well with a cavity suctioning clean water and a water jet installed above the submersible pump and connected to the outlet of the latter through a nozzle, while the suction cavity of the water jet pump through the bypass channel and the pipe becomes contact with the suspended water zone, and the submersible the pump is equipped with a casing that provides cooling by flushing the motor housing with a part of the flow of clean water topped up in the well before it enters the suction cavity of the submersible pump.

The disadvantage of the above devices is that they can raise the settled loose sediment when the suction pipe is immersed in the sediment, but not sealed.

The objective of the proposed utility model is to create a device that performs the function of disintegrating the compacted sludge in the well and lifting it to a suspended state for entrainment by the suction stream.

The problem is solved by means of a pumping unit for cleaning a well, which includes a submersible pump located in the well with a cavity suctioning clean water and a water jet installed above the submersible pump and connected to the outlet of the latter through a nozzle, while the suction cavity of the water jet pump through the suction pipe provides contact with the water zone with suspensions, and the submersible pump is equipped with a casing that provides cooling by washing off the motor housing with a part of the water flow. The pumping unit for well cleaning is additionally equipped with a hydraulic unit of a screw pump, used as a hydraulic motor, driven by a part of the water flow supplied through a pipeline with a flow regulator from a submersible pump, and a disk with disintegrating elements is attached to the hydraulic motor shaft.

Thus, the task of removing compacted sludge in the well is achieved by the proposed utility model of a pumping unit for cleaning wells.

Technical results that can be obtained using the claimed utility model are:

- increase the technical level of work on the disintegration of compacted sludge in the well and lifting it into suspension for entrainment by the suction stream;

- reduce the time they are held;

- to improve the quality of well cleaning with minimal impact on the water intake part of the water well, to eliminate its possible pollution;

- reduce the cost of cleaning the well.

The drawing shows a diagram of the proposed pump unit in the well.

It includes a submersible pump 1 with a casing for cooling the pump motor (not shown), a water-jet pump 2, including a nozzle 3 and a confuser with a mixing chamber (not shown). The water-jet pump 2 is connected to the suction pipe 4, pumping sediment from the bottomhole cavity 5. In turn, the hydraulic unit of the screw pump used as a hydraulic motor 6 is connected to the lower assembly unit 7, and a disk 8 with disintegrating elements is connected to the shaft of the hydraulic motor 6. A drainage 9 is attached to the pressure pipe of the submersible pump 1 to supply water to the hydraulic motor 6 through the flow volume regulator 10 and the pipe 11. The submersible pump 1 and the water-jet pump 2 are fixed to the upper assembly block 12 of the pump unit, the upper assembly block 12 and the lower assembly block 7 connected by a pipe 13, which is the housing of the pump unit. In the lower part of the casing there are openings for water inlet to the submersible pump 1 and maintenance of the fastening of pipelines 4 and 11.

A nozzle 14 with a coupling is attached to the upper assembly block 12 to connect the pump unit with a water lifting pipe string 15.

The pump unit for cleaning wells works as follows. The calculated water volume 17, equal to the total volume of water supply by the submersible pump 1 to the nozzle 3 of the water-jet pump 2 and the volume of water suction with suspensions of the water-jet pump 2 from the well, is supplied to the well between the casing 16 and the pump unit. Simultaneously with the water supply by the submersible pump 1 to the nozzle 3 of the water-jet pump 2, part of the water at the pressure of resistance of the nozzle 3 enters the drainage system 9 and through the flow volume regulator 10 to the hydraulic motor 6 connected to the lower assembly unit 9. The hydraulic motor 6 rotates the disk 8 with disintegrating elements and destroys the sediment 18. The flow of water, which drives the hydraulic motor 6, washes the sediment 18 and lifts it into the bottom hole 5, where it is sucked up by the water-jet pump 2 into the pipeline 4, enters the confuser and then into the mixing chamber. Moreover, the volume of water supplied to the hydraulic motor 6 is a multiple of the smaller volume sucked up by the water-jet pump 2 from the bottom of the well, which prevents contamination of the circulating liquid in the lower part of the pump unit.

At the same time, the submersible pump 1 through the nozzle 3 delivers a stream of clean water. In the confuser, in accordance with the ratio of the squares of the diameters of the nozzle 3 and the mixing chamber, the pressure at the outlet of the confuser is restored, with which the water-jet pump 2 through the pipe 14 and the water-lifting column 15 delivers a flow to the surface into the sump. Particles settle in the sump, and clean water is again fed into the well.

The operating mode of the pumping unit is controlled by the supply of clean water to the well and the volume of pumped out of the well by a flowmeter of the URSV-510 type of St. Petersburg Closed Joint-Stock Company. The dynamic level of 20 in the well is controlled by the PIU2 level gauge of Obninsk CJSC Gidromet. The mass of disintegrated sludge per unit time is determined by a change in its content in the water pumped out of the well, and is regulated by the axial load on the sludge by the suspension unit dynamometer of the pump unit.

Claims (1)

A pumping unit for cleaning a well, including a submersible pump located in the well with a cavity suctioning clean water and a water jet, mounted above the submersible pump and connected to the outlet of the latter through a nozzle, while the suction cavity of the water jet pump through the suction pipe provides contact with the suspended water zone, and the submersible pump is equipped with a casing that provides cooling by flushing the motor housing with a part of the water flow, characterized in that the pumping unit for cleaning the well complements flax is provided with a hydraulic unit screw pump used as the hydraulic motor driven by the flow of the water supplied through the conduit from the submersible pump with flow regulator, which is connected to the hydraulic motor drive shaft with disintegrating elements.