〠Water injection pump condition analysis】 First of all, as the development of the oilfield requires the continuous improvement of water injection strength, the pump pressure is also on the rise. At present, some of the operating pressures have reached or exceeded the rated pressure of the water injection pump. For these overpressure operation of the water pump easily lead to equipment safety incidents. Secondly, fatigue damage may occur to the moving parts of the water injection pump. Because the water injection pump belongs to the reciprocating piston pump, the five crankshaft connecting rod shoes and the crankshaft bearing cyclical heavy load act as the number of operating hours increases. Easy to appear off pieces, crankshaft journal wear and so on. Again, the water pump increases the gap between the movement, due to long hours of operation, the crosshead and crosshead copper sleeve, connecting rod tile and small head tile will exacerbate wear and tear, increased gap leading to increased pump vibration, oil temperature, Pump operation noise is also significantly increased. The current crankcase oil temperature has risen to around. ã€Influence of sewage water quality on water injection pump】 Water quality corrosion of water injection pump components: When using a water injection pump to transport sewage media, the minerals and additives tend to precipitate on the sealing device, reducing the sealing effect. The solid particles can also cause excessive wear on the sealing device. Water injection pump leakage increases, shortened life expectancy, so the sewage quality is the main reason for the failure of the plunger pump seal. From the pump room operation shows that the injection of water two pumps are particularly serious corrosion, not only for the pump itself, the water quality will also corrode other water injection facilities, such as the pipeline connected to the perforated phenomenon. Corrosion reason can be attributed to the following aspects: (1) Dissolved Oxygen In highly salinized water, dissolved oxygen plays a role of cathode depolarization during the corrosion process, which intensifies the corrosion of the steel by the wastewater. (2) sulfate-reducing bacteria and hydrogen sulfide wastewater contain a large number of sulfate-reducing bacteria, which have a greater impact on the local corrosion of steel. (3) When the content of suspended solids and oily oil is large, they stick together and adsorb and deposit on the inner wall of the system, resulting in conditions that are more conducive to the growth and reproduction of sulfate-reducing bacteria. At the same time the dirt will increase the adsorption of germicides, bactericidal effect worse, to promote bacterial corrosion. Dirt deposition on the steel surface, the lower the potential to become the anode, in the absence of dirt at the cathode, the formation of scale corrosion. Field often use infrared temperature detector on the pump hydraulic cylinder temperature detection, and the injection of sewage pump prone to over-temperature conditions, because the sewage itself is too hot, the heat is large, if the heat is not easy to cause packing and packing Abnormal wear between the plunger to speed up the packing replacement frequency; but also lead to a gradual increase in oil injection pressure, resulting in increased water injection energy consumption. ã€Water pump common fault analysis and solution】 In addition, when the pump valve loosening phenomenon, some components may fall into the pump cylinder, which will result in decreased sealing performance. Seal failure (usually packing damage), connecting rod serious leakage of thorns, the seal must be replaced immediately. Otherwise, the water will enter the crankcase along the connecting rod to emulsify the oil, resulting in severe damage to the power end (especially the crankshaft) and even the entire pump in a short time. As the crosshead in the slide constantly back and forth movement, prone to the slide injury, etc., in serious cases will cause the pump shell scrapped, even if it can be repaired, because this type of pump is the integration of the pump casing Design, so the repair is equal to the entire pump overhaul. It is understood that the station has been scrapped - a pump casing (each value & million multivariate), and to be overhaul to be shipped to Dagang Oilfield, freight, maintenance costs and other costs are quite high. The solution is to promptly replace parts, lubricants and calibration. Seal packing leakage reasons and analysis: Injection pump plunger sealing more with soft asbestos packing for sealing, on the one hand these types of materials easily damaged, as mentioned above water quality causes the packing is corroded, or even Fracture, etc., the need to constantly replace the filler; the other hand, due to the high pressure medium in the delivery state, the plunger movement abnormalities can lead to uneven packing force, resulting in the phenomenon of media leakage; In addition, packing gland due to run Over time will appear too loose phenomenon, resulting in seal leakage. The solution is to repeatedly replace the packing when the final shape; in order to prevent uneven force, pressure and pressure required, and measured with a torque wrench; routine maintenance need to adjust the gland tightness. ã€Failure of the plunger seal】 Pump body and pipeline vibration reasons and analysis: From the scene of the pump operation point of view, the vibration of the pump body is more serious, feel more strongly by hand touching the pipeline, observe the installation of thermometers and other meters on the pump body is also not Steady state, the buried pipeline pump cement cracks also appeared many times, and again the scene of high intensity noise and vibration have a great relationship and so on. After investigation and analysis, the general reasons are summarized as follows: (1) Foundation is not strong. (2) A large cylinder or a few large hydraulic losses, resulting in uneven pressure on the pump head. (3) crankshaft axial movement. (4) Plunger connection clip loose. (5) crankcase internal failure and so on. Summary: Pump in operation, in addition to wearing parts need to replace the normal wear and tear repair, the most important is to avoid the internal crankcase failure, this failure may cause burning tile, pulling cylinder phenomenon, resulting in equipment operation accidents, serious When the equipment is completely scrapped. The reasons for burning tiles are many, there are: the viscosity of oil failed to meet the requirements; the presence of impurities in the oil; emulsified oil and other water. Of course, crankshaft and bush clearance is too large or too small; crankshaft axial bearing clearance is too large or too small; connecting rod deformation, etc., may also cause internal crankcase failure. The significance of the failure analysis: Because of water pump failure accident occurred, such as power plant blackouts and water fall (caused by the pressure drop), the loss of millions of dollars. At present, the danger can only be avoided by prompt repairs based on the abnormal changes of the motor and pump, but at this time a lot of losses have been caused. Pump damage after the overhaul costs, transportation costs, such as a large number of pump parts replacement will affect the production lead to more economic losses. After rough statistics, the annual comprehensive maintenance cost of each pump is about RMB10,000, while overhauls cause stoppages about every day in Taiwan, less oil production, about RMB or so, and may cause other situations such as water blockage. Research on the fault diagnosis of water injection pump is of great practical significance, both to ensure the safe operation of equipment, to avoid causing serious accidents, to ensure the safety of workers; at the same time from the economic point of view, can greatly save a variety of maintenance costs . ã€in conclusion】 Dtf Printer,Digital Hot Stamping,Digital Label Printing Press,New Printing Machine Shenzhen Textalk Graphic Technology Co.,Ltd , https://www.textalkdigital.com
Second, the injection of sewage, poor water quality, corrosive, high water temperature, likely to cause damage to the body, valve, pump head, packing assembly and other vulnerable parts, so that the pump is in a high opportunity to damage the state;
Third, maintenance personnel regular maintenance, replacement parts, so that the pump is not in a continuous working condition. Pump running status does exist some worries, to analyze the causes of some common pump failures, and to make timely diagnosis and monitoring diagnosis system to make judgments and prevention, both from a security point of view or from the economic aspects are particularly important.
Status Quo of Pumping Station 's Operating Conditions and Common Problems and Solutions
First, the oil field water injection wells higher water pressure, pump pressure up to about the moment the pump may exceed the rated pressure, the pump is always in high load operation;