In order to increase crude oil production, a relatively new oil production technology was adopted in the Daqing oil field, gas lift production. The basic principle is to inject high-pressure natural gas into the well through the annular gap between the casing and the production tubing, and then through the reservoir. Carrying crude oil into the tubing, natural gas promotes the crude oil to come to the surface manifold in the ascent of the tubing, so as to achieve the purpose of oil recovery. After the oil and gas mixture reaches the ground, the oil and gas are separated, and the separated natural gas is pressurized to enter the oil well again. In order to better control the gas injection pressure for each well, record the amount of natural gas entering each well, and quickly shut down a batch of low-production wells under conditions of heavy load and insufficient pressure to allow other wells to produce normally, and special use of the oil production station. Gas lift balanced gas supply control system. Third, the system composition Its main parts are: KH300AG color paperless recorder, KH300AG color record analyzer, vortex flow transmitter, pneumatic diaphragm control valve, pressure transmitter, Pt100 thermal resistance. The system structure is shown on the following page. Figure 1 KH300AG color series recorder control diagram The core of this system is the KH300AG colorless paperless recorder. This product is a new intellectualized recording instrument with CPU as its core, supplemented by large-scale integrated circuits and graphic LCDs, and its performance and technical indicators have been achieved. The international advanced level. Compared with similar products, this recorder has many unique features, especially for the complex display and control needs of Daqing Oil Field. First of all, it has reliable quality and stable performance. It can be adapted to the harsh temperature and electromagnetic environment on site in Daqing Oilfield. On the other hand, it has all input and output signals isolated, and it can realize intelligent conditioning and universal input functions. Various signals can be used. Direct input, automatic identification inside the recorder, to provide a fully isolated power distribution instrument, use, maintenance is very convenient; third, the accuracy is very high, can reach one-thousandth accuracy; Fourth, cost-effective. Not only can display, record, but also have adjustment, alarm output function, especially suitable for highly dispersed, need to display and need to control the scene of Daqing Oilfield; Fifth, the internal curing of the conventional control algorithm, common medium temperature and pressure compensation, traffic accumulation Other functional blocks; In addition, the volume of small capacity. Up to 16 input channels, 8 PIDs can be configured, and 12 switching outputs are available. Figure 2 Industrial site distribution diagram In this application case, the oil production plant requires a group of four wells to be controlled. The main pipe has the temperature and pressure as gas temperature and pressure compensation. The gas pressure of each well is sent to the recorder, and the recorder is set according to the set value. After PID operation, the result is output to the regulating valve so as to achieve the purpose of controlling the gas pressure. In addition, there is one flow per well, so we have specially designed and configured 10 channels of input channels, 4 channels of analog output channels, and 4 switches to output the KH300AG color C paperless recorder for optimum performance and cost performance. Effect. Fourth, system main function Although the system uses only a small amount of hardware products produced, it has fully realized the complex oil well gas lift automation control, but also meets other functional requirements. With the least money and space, it has won the biggest effect. The main functions of the system are: 1. The well injection gas flow rate is automatically displayed and accumulated. The flow rate uses the built-in cumulative module of the recorder. According to the characteristics of natural gas, we have integrated its dedicated flow calculation algorithm in the recorder, and the temperature and pressure compensation formulas are as follows: 2. KH300AG color paperless recorder with multi-channel, multi-loop capabilities, so that a recorder can achieve more than one well, or even a station control, display, record, but also provides a low pressure gas injection pressure alarm output function. 3. According to the characteristics of the well-dispersed field in Daqing Oilfield, the system is equipped with a record analyzer. Using this recording analyzer, it is not only convenient to transfer the data stored in the recorders distributed in various places to the analyzer for offline display and analysis, but also to be transferred to a general-purpose computer for processing, printing of reports, and the like. 4. Equipped with a complete set of computer management software, users can easily configure their own required screen and processing data according to their needs. Five, summary In short, the system realizes gas-lift balanced gas supply control at the oil production station, and provides other management functions, laying a good foundation for increasing oil production and reducing consumption. Molybdenum disulfide is an important solid lubricant, especially suitable for high temperature and high pressure. It is also diamagnetic and can be used as a linear photoconductor and a semiconductor showing P-type or N-type conductivity, and has the functions of rectification and energy conversion. Molybdenum disulfide can also be used as a catalyst for the dehydrogenation of complex hydrocarbons.
Anti-oxidation: Molybdenum disulfide is obtained through chemical purification and comprehensive reaction, and its pH value is 7-8, which is slightly alkaline. It covers the surface of the friction material, which can protect other materials and prevent them from being oxidized, especially to make other materials not easy to fall off and enhance the adhesion;
Molybdenum Disulfide,High Purity Molybdenum Disulfide,Lubricant Molybdenum Disulfide,Molybdenum Disulfide Powder Jiangsu Lucky Metal Materials Co., Ltd. , https://www.luckymetalmoly.com
It is also known as the "King of Advanced Solid Lubricants". Molybdenum disulfide is a solid powder made of natural molybdenum concentrate powder after chemical purification and changing the molecular structure. This product is black and slightly silver-gray, with metallic luster, smooth to the touch, and insoluble in water. The product has the advantages of good dispersibility and non-adhesion. It can be added to various greases to form a colloidal state with no adhesion, which can increase the lubricity and extreme pressure of the grease. It is also suitable for mechanical working conditions of high temperature, high pressure, high speed and high load, so as to prolong the life of the equipment.
The main function of molybdenum disulfide used in friction materials is to reduce friction at low temperature and increase friction at high temperature, with small loss on ignition and volatile in friction materials.
Friction reduction: The particle size of molybdenum disulfide processed by supersonic jet pulverization reaches 325-2500 mesh, the hardness of micro-particles is 1-1.5, and the friction coefficient is 0.05-0.1, so it can play a role in reducing friction when used in friction materials;
Friction increase: Molybdenum disulfide is non-conductive, and there are copolymers of molybdenum disulfide, molybdenum trisulfide and molybdenum trioxide. When the temperature of the friction material increases sharply due to friction, the molybdenum trioxide particles in the copolymer expand as the temperature increases, and play a role in increasing friction;
Application of Color Paperless Recorder in Oilfield Acquisition