Booster pump stations: photo, equipment, construction
Booster pump stations are used forarrangement of oil modern wells along with systems for gathering and preparing deposits, measuring facilities, a pumping system and a central point of collection, preparation of petroleum products and materials detached from them. Between each other, all elements are aggregated through pipelines. On them the extracted liquid moves to the outgoing line, the diameter of which is from 73 to 114 mm. Then the raw material is transported through manifolds with an increased diameter.
Booster pump stations (CSN) are used onwells that do not have sufficient reservoir energy to deliver the oil and gas substance to the preliminary water discharge device (WWTP) or the oil transfer point. As a rule, the units under consideration are used on separately located deposits.
The main purpose of booster pump stations- Separation of gas from oil, purification of raw materials from the dropping liquid, subsequent movement of the oil mass by means of centrifugal pumps, and gas - by pressure in the separator compartments. The BPS is the first stage of separation, it removes gas into a separate collector. A discharge of water is also provided, followed by its injection into the wells of an absorbing or injection type.
In practice, three standard sizes are usedbooster pump stations. Among them - the models 7000, 14000 and 20000. The numerical designation indicates the supply of liquid by the unit (m / s). Technological procedures consist of such operations:
- The first stage of separation of petroleum products.
- Pre-discharge water if required.
- Heating of well contents.
- Moving the oil and gas mixture to the DSP.
- Transportation of oil separated from the oil at the first stage of purification at the GPP and other receiving points.
- Averaged recording of oil, gas and water.
- Loading chemicals.
Below is the equipment of booster pump stations:
- Buffer tank.
- Compartment for collecting and pumping oil leaks.
- Pump with electric motor.
- Instrumentation and instrumentation.
- Candles emergency gas discharge.
Principle of operation
Oil from gas is separated in separate compartmentsCSN, which are aggregates of separatory action. They perform not only gas sorting, but also the protection of crude oil from mechanical impurities and commercial water. In fact, these aggregates are sedimentation tanks. They are of two types: horizontal and vertical execution.
Booster station, photo of whichis shown below, equipped with a horizontal buffer capacity of 100 cubic meters. m. and pump pump type 8ND-9X3 with electric motor A-114-2M. The 700th version uses one pump and one buffer node, and in the modification of 20000 - additional analogs, along with the specified units. Also at each station there are backup pump systems.
The design of the buffer tank at the booster pump station
For buffer tanks,horizontal tanks of separator type. Their volume is 100 cubic meters, and the working pressure is 0.7 MPa. Creation of a uniform mirror of the placed liquid is provided by transverse partitions of the lattice type. Gas from these tanks is transported to a special assembly manifold.
Also, the system can use a verticalseparator. It is a container inside which the oil and gas mixture under pressure is fed through the nozzle to the delivery manifold. Further, oil products pass through the pressure regulator, getting into the atmosphere with a stable equal load. By lowering the pressure from the incoming mixture, gas is released. Since this process takes time, the inclined shelves in the unit design ensure the supply of the cleaned solution to the bottom of the separator.
The extracted gas rises, after whichIt is transported to the drop catcher, which separates the oil particles and moves the gas into the gas pipeline. Removed oil enters a special tray. The process control is carried out with the aid of a regulator, a glass browser and a slurry outlet.
One of the technological schemes of automatedBlock booster pump stations provide for equipping with centrifugal pumps. Since there is a significant amount of gas in the seams, its supply to the pump can exceed a critical value of 10 to 15 percent. To ensure the normal operation of the units, the preliminary separation of the seams and products contained in them is used. This approach allows to reduce the gas content and remove more than 70 percent of commercial water. For pumping equipment of this design, plunger, multiphase and centrifugal pumping devices are used.
In the second version of the working chart of CSNOnly pumps with several phases are to be installed. In this case, the reservoir raw materials are sent to the CLPP. Then the system eliminates the need for separation of associated gas streams. And this happens directly on the territory of the field being developed. Multiphase pumps allow significantly reducing the pressure at the inlet manifold of the CSN. Nevertheless, such aggregates experience a critical load when the content of mechanical impurities is exceeded, which requires the installation of additional filter elements.
Such units are designed for pumpingsaturated with water and gas of the oil mass. They function optimally at an operating temperature of the feed mixture of about 45 degrees Celsius and a density of up to 1000 kg / m3.
Kinematic viscosity of the processed massis not more than 8.5 parts of the hydrogen parameter. The gas content is fixed within 3 percent. A similar paraffin level indicator should not exceed 20 percent, taking into account other mechanical impurities. The automation of the booster pump station allows the assembly to be completed with a mechanical seal, which makes it possible to reduce the total leakage to 100 milliliters per hour.
The main working part of the CSN consists of a casing withdischarge and suction lids. In addition, the design includes front and rear brackets, guide systems, fixing bolt elements.
The guide section aggregates with sealingrings and forms a single pump unit. The body joints of the guide devices have rubber seals, impeller. These parts form the main pump compartment. The body connections have rubber seals resistant to oil products. This design allows you to change the pressure of the supply of the working mixture, depending on the features of the well being developed, as well as the number of impellers and guiding devices. When operating the unit, only the length of the tie rods and shaft changes.
Pump Support Bracketsmade of cast iron. This makes it possible to strengthen the stability and reliability of the unit. The system also includes seals made of special pressed material and details of their alloy chromium and nickel.
Booster pump station, standard sizes andthe characteristics of which are discussed above, has a specific purpose. It serves for separation and transportation to the receiving and processing devices of the oil and gas mixture. At the same time, the components are collected and prepared from water, gas and oil.
Automated block booster pumpstations also participate in gas separation and purification of the mixture from the dropping liquid. Oil is pumped by a special pump, and the gas is transported under the pressure arising during the separation process. At oilfield enterprises, oil products pass through buffer tanks, flowing to the pump and oil pipeline. By and large, the CSN is a full-cycle pumping station that allows to take into account the supply, processing and quantity of components of oil products used in production.