Overview

In the industry circle where the steam is used as energy transfer, real-time and effective steam metering is of great importance for monitoring energy suing, improving efficiency, reducing cost,  improving management. Most of the familiar industrial steam is wet saturated steam which is always being a challenging problem because it is not easy to be accurately calculated as that of superheated steam or dry saturated stem, and it is  harder to get the online medium density. So far there is no device in the word that can accurately measure the density of wet saturated steam.

Two-Phase Steam Online Metering Device（FCLSP）series adopt a new type of heating method to measure the dryness of wet steam .Then, using method of dryness compensating density to calculate flow. Heating device adopts concentric, mutual heat insulated and insulated double casing. The steam will be flowed into both inner layer and annular layer to ensure the same temperature in and outside the inner insulated casing, to avoid thermal conductance and to realize zero heat loss. Inner heating resistors distribute uniformly in the heating casing to reduce steam disturbance caused by non-uniform heating. The new heating method of steam metering device FCLSP guarantees the accuracy of dryness measurement thus ensures the reliability of the wet saturated steam density and realizes accurate flow calculation. FCLSP has the advantage of wide application range, high measurement accuracy and long service live which can be widely used in chemical, petroleum, power, textile, printing, dyeing, pharmaceutical, tobacco, food, light industry and other industries.

Features

• high measuring accuracy, strong anti-interference ability, bigrange ratio
• high temperatureresistance, high pressure resistance, corrosion resistance
• easy to be installedand maintained, low failure rate
• compact structure, convenient to be operated, intuitive display
• sand control,anti-scaling, prevent impurities, energy-saving, environmental protection
• local display, remote control and remote data browsing

Working principle

Two-Phase Steam Online Metering Device（FCLSP）applies thermodynamic principle and is based on energy conservation. It can measure the dryness of wet saturated steam in real-time and make dryness feedback compensate density to ensure accurate measurement of wet saturated steam quality flow. When it is operated, the flowing steam in main pipe will first flow through the flow metering module. After that, a little steam will flow into dryness metering module through steam sampling apparatus, and those steam will be heated into dry saturated steam or superheated steam by heating device. With all kinds of signals acquired by controller and accurate steam dryness that calculated by inner mathematic model, the dryness will be sent back to flow measurement module by data transmission communication device to process density compensation and to calculate main pipe steam flow. The structure of this device can be divided into three parts of “flow measurement”, “dryness measurement” and “controller” (flow control and data communication). 

(1)flow meter in main pipe; (2) sampling entryway; (3) sideway entryway; (4) external thermal insulation wall; (5) inner thermal insulation wall; (6) heating resistor; (7) temperature sensor; (8) flow meter in branch pipe; (9) switch valve; (10) backflow entryway; (11) main pipe; (12) sideway entryway; (13) temperature sensor; (14) pressure sensor;

Technical indicator

Type selection

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Overview

The accurate and real-time measurement of multiphase flow production is of great importance for mastering the oil well production performance and working condition and taking production optimization measurement. So far, multiphase flow meter which is mostly used in domestic petroleum industry produces some additional pressure in the process of measurement, which increases the wellhead back pressure. Higher wellhead back pressure will increase the energy consumption and impact on the oil production. Intelligent micro-differential pressure online metering system of oil well has the advantages of small loss of pressure, strong function, high precision, high degree of automation etc.; Intelligent micro-differential pressure online metering system of oil well can accurately get the wellhead temperature, pressure, differential pressure, instantaneous flow rate, time yield, cumulative yield and the average yield in time.

Features

• Because using micro-differential pressure meter to measure the pressure, the pressure loss is small. The installation of micro-differential pressure meter won’t increase the wellhead pressure or impact on the oil production.
• Because of adopting micro-differential pressure meter, as for pressure before and after the throttle, the differential pressure is in one metering system, thus the problems of pressure inversion and zero dare avoided.
• The reason of accurate calculation is considering the impact from fluid Reynolds number on efflux coefficient and expansibility factor , so that correcting these parameter. The calculation model is based on solid physical theory. The application range is unlimited.
• The influence from different water cut and different gas oil ratio on the production is taken into consideration in this method, so it can adapt to metering produced fluid of oil well with different water cut and different gas oil ratio, and it can reflect the changing trend of the produced fluid.
• It can precisely calculate the physical property parameter such as multiphase mixture densities  , and it can improve the accuracy of metering produced fluid by accurate correction of online temperature  and pressure compensation to multiphase physical property parameter.
• The calculation error can be ensured less than 5%; the calculation accuracy can be improved by standardization.

Working principle

The calculation model based on throttle device:

The throttle micro differential pressure is measured by the intelligent micro differential metering device installed on wellhead, combined with the water cut, oil density and gas oil ratio of every well to carry out accurate parameter correction of viscosity and mixed density. The adjusted parameter will be used for iterative solution for flow coefficient of multiphase fluid. At the same time, considering the impact from gas expansibility factor on the flow calculation, the production of different water cut and different gas oil ratio will be calculated by temperature compensation and pressure compensation etc. and finally according to multiphase flow throttle calculation model.

Technical indicator

Application

According to well type, water cut, gas content liquid production capacity etc. This system  selects four typical oil wells to test in XX oil field . By the comparison of the metering result from this system and the manual metering result, a preferable uniformity is reflected especially in the fluctuation trend of fluid production in which the two metering methods are almost the same. At the same time, the measurement of those wells is very precise; the relative error is less than 5.0%.

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Overview of the product

FlexCon-Rod Intelligent Flexible Controller of Pumping Unit combines technologies of oil production engineering, automatic instrument, computer, micro-control, mechatronics, frequency conversion and modern communication. Through real-time acquisition diagram to judge the ability of supply-discharge coordination by the change of diagram characteristics, and through comprehensive evaluation by self-adaption system to adjust electric motor torque, it can realize speed stepless regulation, optimize the speed distribution of the point in the stroke cycle, reduce peak value of point load, reduce point fluctuation, improve the dynamics performance of pumping unit, improve the coefficient of production time of pumping unit single well, save the energy, reduce network loss, and solve the problems of wasting energy, big start torque, and large current shock, thus it will fundamentally achieve energy saving and well stimulation.

Features of the product

The successful design of  Intelligent Flexible Controller of Pumping Unit（FlexCon-Rod） is made by many site experiments and consulting a lot of advice from experts. There are many unique features shown as follow:

• Industry standard design, adapt to the wild environment
• Control strategy of non-uniform velocity
• Speed stepless intelligent regulation in the period
• Rational structure can be directly applied to industry site
• Strong ability of field instrument access
• Have both on-site and remote monitoring to facilitate system operation and maintenance
• A variety ways of communication facilitate, the SCADA system combination and realize unattended operation
• Function of further programming for users
• Sufficient reliability design, strict quality inspection, provide users with a reliable guarantee

Functions of the product

• Function of field instruments access
• Function of real-time monitoring acquisition
• Function of intelligent control
• Function of automatic alarming
• Function of wireless communication

Technical indicator

Appearance and size of the product

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Overview

High pressure flow automatic control instrument combines the functions of flowmeter, flow regulating valve, intelligent controller and communication technology. Using AC and DC power supplies, automatic and manual control flow in two ways .Improving the safety and reliability of the system, guaranteed the system to work properly in harsh weather conditions. It is widely used in the field of intelligent control and liquid flow detection such as oil, hydro, coal, water, salt, municipal and other industries.

Features

• compact structure, convenient operation, intuitive display, high control accuracy
• sand prevention, anti-fouling, anti-impurity, energy saving, environmental protection 
• resistance to high temperature, high pressure and corrosion
• with types ofmovable parts, no moving parts and no shear
• Automatic and manual dual-use
• Local display, remote control and remote data browsing
• High accuracy, wide range ratio

Working principles

Various signals collected by the controller were analyzed and compared with pre-set values. If the signals collected from the meter, deviate from the pre-set values, the controller will send the right commands to actuator to adjust he valve opening degree, making the high-pressure flow-controlled instrument reach a predetermined value and achieving the closed-loop automatic adjustment of flow control. The structure of high pressure flow automatic instrument is divided into these three parts of "flow measurement", "flow adjusting mechanism", "controller" (flow control and data communications).

Technical indicators

Application

 High-pressure flow automatic control instrument was successfully applied to oilfield intelligent injection system, achieved quantitative water injection and real-time acquisition of wells producing conditions, real-time diagnosis,optimization and control, etc.

Real-time data acquisition (water allocating station): the main pressure, oil pressure, temperature, flow, the electromagnetic valve opening and so on.

• Injection intelligent system has achieved real-time acquisition of working condition, real-time diagnosis, real-time optimization, real-time control and intelligent prediction in the oil field.
• Injection intelligent system uses water sleeve type flow automatic control device for high voltage (32 ~ 45MPa) injection of intelligent control. High pressure difference controls own small torque, the whole equipment is energy-saving and the power rating of it is 15W.
• Injection intelligent system can be set freely according to different requirements, such as quantitative control, timing control, temperature control (wellhead electric heating to prevent pipe freezing), pressure control (anti flowback),  proportional control ( two flowmeters to achieve stratification control).
• Injection intelligent systems equipment spans a wide range (0.35 ~ 20m³ / h) to support online well washing and the real-time display of flushing condition data.

Product Selection

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