The tertiary oil and gas recovery device adopts a pry mounted integrated design, and the on-site installation workload is much smaller than traditional component assembly, which has led many project parties to relax their vigilance. But the simpler it looks, the easier it is to encounter problems in several key stages. Based on on-site experience, the most common misconceptions in device installation are concentrated in three aspects: pipeline connection, equipment foundation, and electrical wiring. This article summarizes these common mistakes for construction and gas station operation and maintenance personnel to compare and self check.
The most typical problem in the piping process is that the accessories of the intake and return pipes are incomplete, and the airtightness test is ignored. The intake pipeline must be equipped with shut-off valves and flame arresters, and the return pipeline must be equipped with shut-off valves and check valves. These accessories are key to ensuring the safe isolation of the device and preventing oil and gas backflow. Some project drawings omit check valves to save time, which may cause oil and gas backflow during oil unloading. Another common problem is that the pipeline is directly put into use without conducting an air tightness test, and slight leaks at the joints are not detected at the time. It is only after operation that abnormal losses are discovered. After the pipeline is completed, it is necessary to conduct air tightness tests section by section.
Although the pry mounted device occupies a small area, the foundation cannot be careless either. Common misconceptions include uneven foundation, not higher than the ground, and no reserved drainage around. Uneven foundation can lead to uneven force distribution on the pry body, affecting internal pipeline connections and equipment stability; The foundation is level with or below the ground, and in rainy weather, it is easy for water to accumulate and soak the bottom of the equipment, causing corrosion of the electrical control box and pipelines. The correct approach is to create a flat and elevated concrete foundation, with drainage slopes around it to avoid long-term immersion of equipment in accumulated water.
Misconceptions in the electrical process include incorrect phase sequence connections, inadequate grounding, and live working. The tertiary device has requirements for the phase sequence of the three-phase power supply. When the phase sequence is wrong, the equipment cannot be started, and the phase sequence protection light will be red. At this time, just switch off the power and then switch any two phase lines to power on again. The grounding system is the key to explosion-proof design, and the grounding resistance must meet the requirements. The grounding wire must be intact and securely fastened. Another easily overlooked item is that it is strictly prohibited to open the explosion-proof junction box cover with electricity. The power must be cut off and the concentration of combustible gases on site must be confirmed to be at a safe level before operation.
Most of these misconceptions are not technical problems, but rather oversights in the construction and operation processes. It is recommended to write a construction disclosure list for pipeline accessories, air tightness tests, foundation drainage, and electrical specifications, and check each item during installation and acceptance. Only by paying close attention to the details can the three stage oil and gas recovery device be installed in place and operate stably, avoiding repeated inspections and rework in the future.
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