Cluster Wells Casing Pressure Balance Type Automatic Dosing And Remote Control Technology Research

In the process of oil production,downhole wax,and wash out of the asphalt, dirt and corrosion etc.Phenomenon prominent,seriously affect the crude oil output and oil well pump inspection cycle,which requires to oil wells investment agents so as to achieve the effect of corrosion inhibition,wax control and viscosity reduction,achieve the stable production of crude oil and oil wells exemption period delay,improve economic efficiency.At present,the domestic oil mainly adopts artificial feeding,the workers regularly to the oil field shot way of paraffin remover and inhibitor medicament such as one-time dosing,there are high labor intensity,higher labor costs;Part of oil by pumping wellhead itself on the polished rod motion as the driving force of the wellhead mechanical automatic feeding device,implementation will be installed on the wellhead medicament dosing tank dosing,complex structure,maintenance is difficult;some oil wells with high water pressure has been used as a light bar automatic feeding device for power, there are high labor intensity,high cost,complicated device,heavy workload and cost.High,difficult to timely,accurate and comprehensive intuitively and efficiently reflect the dynamic production problems.In view of the current dosing device automation level is not high,lack of bottom hole conditions poor adaptability for dosing device at present are not high degree of automation,the deficiency of the bottom hole conditions poor adaptability,due to oil casing pressure of crude oil wax and scaling have certain effect,the pressure becomes small,precipitation of the substance will accelerate,more prone to fouling phenomenon.Controlling the rate of fouling can be effectively controlled by controlling the pressure in the oil well.Therefore,in order to improve the wellsite dosing control precision and degree of automation,adapt to the requirements of the development of the digital oilfield,according to the original wellsite dosing device are dosing discontinuity,medicament is not balanced,and automatically adapt to problems such as lack of bottom capacity condition,the set of flat scale automatic dosing is particularly important.This paper presents wellsite pressure balance type continuous automatic dosing and remote control scheme.The main research work is as follows:In the pumping process,underground anti wax,scale and corrosion of casing pressure balance principle of drill cluster well automatic dosing method based on.The automatic dosing process and dosing mode three.Put forward the calculation method of the dosage of the medicine,including Chinese medicine agent height calculation and instantaneous flow calculation.According to the calculation results of the liquid flow rate,the control current signal which can be adjusted by the proportional flow valve can be obtained,and then the dynamic and precise control of the dosage can be completed.Study on the chemical control and remote monitoring technology.To the feeding control device the core components of the model,including the sensor and solenoid valve.The typical dosing control scheme,including liquid flow control,signal processing,electromagnetic valve control signal set.The construction of the remote monitoring system based on Kingview software,developed the corresponding monitoring program.For the software design of the system,including dosing control system software design,PC configuration screen design PLC and GPRS communication.Remote monitoring system based on GPRS wellsite automatic dosing device is in a single well or cluster wells of oil field in every automatic dosing device for monitoring,wireless remote monitoring system using GPRS network operators,using GPRS communication technology,the automatic feeding device for the sensor collected data remote transmission to the monitoring center platform of oil field.According to the collected data,fault diagnosis,alarm,real-time condition monitoring,remote control and other functions are carried out.The main goal is to digital oilfield platform based,change the wellsite dosing device operating data acquisition is not timely,fault treatment cycle is long,the disadvantage of low efficiency,the wellsite dosing device management more perfect,reduce the workload of management personnel,improve the maintenance and management level of the operation of the whole production system.The design of the overall structure of the program site set pressure balanced tone automatic dosing system.The system is composed of a dosing device module,dosing control module and remote control module.A prototype of automatic dosing and remote control system,and the experiment was conducted in the laboratory and field.The experimental results prove the rationality and adaptability of the developed system.Set pressure balance site automatic dosing and remote control system development,greatly improving the labor productivity,to ensure the efficiency and quality of production,realize the automatic dosing and remote control,solve the workers on duty 24 hours shifts,implementation of digital oilfield has important significance.