RU2264249C2 - Device for preparing salt solution - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: device comprises salt crusher, charging hopper, tanks for hydrodynamic solution of salt, tanks for storing finished salt solution, tanks for hot water, tanks of the chemization unit, slim collector, and slim pumps. The chemization unit is provided with a three-plunger pump for batching the solutions of chemical reagents to the finished salt solution. The pipeline for supplying fresh water is provided with a solenoid-operated valve. The pipeline for discharging the finished salt solution is provided with mass flow rate meter.

EFFECT: improved ecology safety and enhanced quality of solution.

2 dwg

Description

The invention relates to the oil and gas industry and can be used in the new design of special technological equipment for the purpose of preparing salt solution and additives for killing wells during development, underground and overhauls of wells.

Known devices for dissolving salts containing containers, pumps and pipelines (as USSR AS No. 9774). Known devices have limited functionality.

A known site for the preparation of saline solution containing containers for hydrodynamic mixing of saline solution, slurry pumps, pipelines (patent SU 1820859, Mcl B 01 F, 1/00 1993). This device does not meet the modern requirements of industrial environmental safety, has limited functionality.

The technical task is to expand the functionality of the salt solution preparation unit, to meet the requirements of industrial environmental safety, to improve the quality of the salt solution for killing wells, to develop and serial supply domestic technology equipment to the oil and gas fields.

The solution to the technical problem is achieved by the fact that the salt solution preparation unit is equipped with a salt grinder, a loading conveyor, additional containers for storing salt of optimal density, for supplying technical and hot water, tanks for the chemicalization unit, a separate tank for collecting sludge, connected by pipelines through slurry pumps with tanks hydrodynamic mixing of the saline solution with three plunger pumps for dosed supply of chemicals into the prepared saline solution, the pipeline cottages pure water provided with a solenoid valve, and dispensing of the finished conduit saline has a mass flowmeter.

Figure 1 shows the node for the preparation of saline for killing wells in oil and gas fields.

Figure 2 conditionally shows the node for the preparation of saline, top view.

The salt solution preparation unit has a transformer substation 1, a loading rack 2, a chemicalization unit 3, an administrative and household complex 4, a container for storing equipment 5, a room for preparing saline solutions 6, a salt storage warehouse 7, two containers for hydrodynamic mixing of salt solution 8, four storage tanks for finished saline solution 9, switchboard 10, manifold block 14, sludge collecting tank 12, four water storage tanks 13, loading conveyor 14, salt grinder 15, loading hopper 16.

The salt solution preparation unit was made in a rapidly erected building 6, in which tanks, slurry pumps, a warehouse for receiving and storing technical salt 7, a crane crane with a lifting capacity of 2 tons, electrical equipment for automated control, monitoring and signaling are located in an isolated control room, and for issuing ready saline bulk loading rack 2 with platforms for operators.

Salt from the crusher 15 enters the loading conveyor 14, in which the salt solution is supplied to the compartments 8 of the hydrodynamic mixing tank. Fresh water by a slurry pump from the tank 13 for storing water is supplied to one of the tanks 8 for preparing brines, which is a rectangular two compartments. The mixing compartment is equipped with a line with jet jet nozzles.

During the mixing cycle, fresh water is supplied to the pre-mixing compartments, as well as to the receiving compartment, filling these containers with approximately 70% of the volume. The filling volume is controlled by an electronic level sensor with the output of information on a digital graphic display in the operator room. In this case, the upper equalizing valve between the receiving and mixing compartments is in the open position. The slurry pump starts when the pressure valve is open, installed on the water supply line to the jet nozzles. With the equalizing valve open between the compartments, the liquid level in them will remain constant. When the maximum concentration of saline solution is reached, the prepared solution is pumped into one of the tanks 9 for storing the finished solution.

In the case of accumulation of the solution during the storage time, sedimentation and qualitative improvement occur. To prevent the crystallization of salt and its precipitation, the slurry pumps are switched into a circulation mode. The technological scheme of strapping tanks with pipelines and slurry pumps allows you to perform numerous maintenance operations of the unit during operation. The density of the saline solution to the required value before loading into the tanker is ensured by an electrovalve installed on the fresh water supply line.

The finished solution is pumped through the mass flow meter and filter unit to the overpass 2 for consumers. The mass flowmeter monitors the volume of liquid shipped, its density and temperature.

The filter unit provides the purification of saline solutions to a purity of 5 microns by suspended particles.

Saline solutions after separation of solid particles are subjected to chemical treatment with chemicals to obtain a sufficiently high-quality product.

To supply the necessary chemicals to the prepared brines, a completely isolated room 3 is allocated. There are four containers for storing a demulsifier, a scale inhibitor and clay stabilizer in it. Chemicals are fed by a dosing three-plunger pump into solutions through a pipeline after the filter unit.

For cleaning and disposal of all waste from any containers, one container 12 with a volume of 25 m ^{3 is} provided. In it, salt sludge wastes are cleaned by washing them 4-5 times with fresh water.

The liquid after dissolution of salts from the sludge tank 12 is pumped into the tank 8. The sludge in the form of sand, quartz, gravel is transported to a place for solid waste disposal during storage.

Ultrasonic level sensors are used to control, signal and regulate levels in storage and pre-mixing tanks. Visual information on the technological parameters of the mortar unit is displayed on a digital display with the ability to store information on an electronic medium.

Recording devices, control equipment are located on the automation and control panels in the control room.

The proposed device has a high performance preparation of saline.

Salt preparation unit is a new device with advanced functionality. In comparison with the base object, the proposed device provides high quality saline solution and resource saving.

The use of a new salt solution preparation unit instead of artisanal basic objects will make it possible to obtain a positive technical and economic effect due to the quality of the salt solution and the quick payback of production.

Claims (1)

A unit for preparing a saline solution containing containers for hydrodynamic mixing of the saline solution, slurry pumps, pipelines, characterized in that it is equipped with a salt grinder, loading conveyor, additional containers for storing a salt solution of optimal density, for supplying technical and hot water, tanks for the chemicalization unit, a separate tank for collecting sludge, connected by pipelines through slurry pumps with tanks for hydrodynamic mixing of saline solution, a three-plunger pump for dosed supply of chemicals to the prepared saline solution, and the pipeline for supplying pure water to the saline solution is equipped with an electrovalve, and the pipeline for dispensing the finished saline solution has a mass flow meter.

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