Screw pump oil recovery technology has been widely used in oilfields, and it can play the most important role in oil recovery technology under the complex geographical conditions of oil fields. We need to continuously research and innovate on screw pump oil recovery technology, and make screw pump oil recovery technology to a more advanced level. Development in the direction of energy saving, environmental protection, high efficiency and intelligence.
1. Overview of screw pump oil production process
The surface-driven screw pump oil production system mainly includes several major systems. It is a new type of mechanical oil recovery technology used in various oil fields, including downhole screw pumps, mirror screw pumps and ground drive devices. The working principle of the ground-driven screw pump refers to the process of forming a disappearing process due to suction in a sealed room, pumping out underground oil, and fully removing the liquid in the well. Compared with other traditional oil production equipment, screw pump oil recovery technology has the advantages of low cost, convenient operation, simple structure, low installation and maintenance costs, energy saving and emission reduction, etc. Therefore, screw pump oil recovery technology has been widely used in major oil fields in my country.
2. Situation analysis of Chinese screw pump oil recovery technology
2.1. Continuous rod supporting oil production technology
The torque of the screw pump is generally relatively large, which is caused by the rotation of the screw pump during the process of working and stopping. This kind of torque is easy to tear the screw pump. To solve this problem, we often use the continuous rod supporting technology, which effectively reduces the possibility of tearing of the screw pump due to torsion problems, and effectively shortens the time of oil production operations, so it saves a lot of money. cost, creating economic benefits.
2.2. Direct drive screw pump oil production technology
China has a vast land area, and the distribution of oil fields is relatively scattered. The geographical environment of each oil field is also different. However, in the oil field exploitation of some islands, the technology we often use at present is the direct drive screw pump oil production technology. , this technology is based on the improvement and innovation of the traditional screw pump oil extraction technology. Its working principle is that in the working process of the direct drive screw pump, the vertical hollow shaft motor is used to replace the original mechanical belt transmission device and The polished rods are connected, and the vertical hollow shaft motor adopts a permanent magnet motor. The control of the motor is mainly completed by a professional-grade brushless DC controller. Technology can effectively improve the efficiency of oil recovery.
2.3. High torque resistance sucker rod
The high-torque-resistant sucker rod oil recovery technology is also improved and innovated on the traditional screw pump oil recovery technology. The use of this technology can greatly improve the torque resistance of the screw pump and effectively extend the life of the screw pump. Service life, the use of high-torque sucker rod oil recovery technology can generate a certain pre-tightening force during production operations, and the pre-tightening force can well prevent the possible tripping of the screw pump during downhole operations.
2.4. Large-displacement screw pump oil production technology
At present, most oil fields in China are in the middle and late stages of production, and the effect of using large-displacement screw pump oil recovery technology is very obvious. The use of large-displacement screw pump oil recovery technology can keep the oil production in a relatively stable state when the oil field enters the middle and later stages of production. The space occupied by this technology for oil extraction is relatively small, and the noise generated is relatively small.
3. Discussion on the application of screw pump oil production technology
3.1. Application of screw pump oil production technology
We need to select the oil production process of the screw pump according to the specific conditions of the screw pump. When selecting the process of the screw pump, we mainly consider the following aspects:
1) Whether the operation of the screw pump oil production system is normal
In order to meet the actual needs and requirements of oil production in oil wells, we design screw pumps on the basis of safe and stable operation of the screw pump oil production system. When designing, we need to consider the oil production of the oil field and aim at the oil production of the oil field. Use appropriate screw pumps and corresponding supporting facilities as much as possible, then consider whether the selection of screw pumps, downhole anchoring equipment and ground driving devices is reasonable, and adjust the design plan appropriately.
2) Strengthen the analysis work on the oil production site
The depth of the oil well in the oil production area directly affects the selection of the screw pump, which requires us to further strengthen the analysis of the oil production site to understand and master the specific conditions of deep well oil production. The selection of the depth of the screw pump should be determined according to the oil well pumping volume.
3) Improve energy consumption monitoring of screw pumps
Continuously improve and perfect the supporting process of oil production of the new screw pump, and establish a corresponding management and monitoring system according to the oil production of the screw pump. In order to improve the economic benefits of oilfield enterprises, the role of the screw pump oil recovery process must be fully utilized.
3.2. Research focus of PCP oil production technology
China’s screw pump oil production technology has a very wide range of applications at this stage, so we need to further strengthen the key analysis of the screw pump oil production technology, research and develop new screw pump profiles, new technologies, and high-lift screw pumps Oil production process technology, aiming at developing better methods and advanced oil production equipment in the case of large displacement, prolonging the service life of screw pumps. The research direction of the new screw pump should be developed towards high efficiency, energy saving and emission reduction, no leakage, strong sealing, environmental protection, wear resistance, corrosion resistance, high temperature resistance, etc., combined with modern advanced computer technology, the screw pump will be further optimized. Towards the development of artificial intelligence. For some oil wells with relatively high water content, strengthening the stability of oil transportation plays a very important role in development and research work, and the oil production potential of oil wells will also be limited by the impact of the liquid production rate of the screw pump. The problem of directional wells in low-permeability reservoirs in general oilfields can be solved by using large-displacement screw pump oil production technology. The torque generated by the screw pump during oil production has a direct relationship with the start and stop of the screw pump. The way to solve this problem is Reasonable screw pump oil extraction technology is adopted to effectively reduce the generated load and reduce the friction coefficient.
3.3. Exploration of future screw pump technology
We need to gradually improve the oil production supporting technology of the screw pump. First, promote some relatively mature and stable screw pump oil production technology, which can effectively guarantee the reduction of equipment cost and the device will not produce shutdown effect. If you want to increase the service life of the screw pump, you must fundamentally use large displacement and anti-tripping. According to the actual production situation of the oil field, the establishment of the oil production management and monitoring system of the screw pump will further expand the application range of oil production technology. On the basis of improving the oil recovery efficiency and application level of the oil field, the optimization effect of the oil recovery process technology can be realized, and the role of the oil recovery process technology can be maximized to reduce the energy consumption.