According to different types of water well drilling rigs and drilling requirements, the selection of hydraulic pumps should consider multiple factors. The working environment, functional requirements, load requirements and depth conditions of different drilling rigs will affect the selection of hydraulic pumps. The following are the main factors to consider when selecting hydraulic pumps:
Type and functional requirements of drilling rigs
Light drilling rigs and heavy drilling rigs: Light drilling rigs are usually used for drilling in shallow water wells or medium depths, and the flow and pressure requirements of hydraulic pumps are low. In contrast, heavy drilling rigs are used for drilling in deep wells or complex geological conditions, and higher pressure and flow are required, so the power and efficiency requirements of hydraulic pumps are higher.
Fully hydraulic drilling rigs: All actions of this type of drilling rig are controlled by the hydraulic system, and a large flow and high pressure hydraulic pump is required to ensure the stability and efficiency of the equipment during deep well drilling.
Drilling depth
For shallow well drilling rigs (for example, less than 300 meters deep), the flow and pressure requirements of hydraulic pumps are low, and ordinary gear pumps or screw pumps can meet the needs.
For deep well drilling rigs, especially those with a depth of 500 meters or more, the selection of hydraulic oil pumps should consider higher pressure and flow to cope with the increased friction and load during deep well drilling. High-pressure plunger pumps or variable pumps are usually selected to adapt to high-load working environments.
Pressure and flow requirements of hydraulic systems
When selecting hydraulic oil pumps, the maximum pressure and flow required by the system must be considered. The pressure of the hydraulic oil pump should be able to withstand the highest load of the drilling rig during operation. Usually in deep well drilling, the working pressure of the hydraulic system can reach 30-40MPa (megapascals) or higher.
Selecting the right flow can ensure the response speed and working efficiency of the hydraulic system. If the flow is too low, the drilling rig will become slow or unstable; if the flow is too high, it may cause energy waste and system overload.
Oil pump type and efficiency
Gear pump: suitable for drilling rigs with low flow requirements, simple structure, low cost, suitable for shallow well drilling or low-load operations.
Plunger pump: With high working pressure and flow, it is suitable for medium-deep well drilling, can provide stable hydraulic power, and ensure the normal operation of the drilling rig under complex geological conditions.
Variable displacement pump: It is suitable for drilling rigs that need to flexibly adjust the flow, especially when the workload needs to be changed at different depths and under different operating conditions. This type of pump can adjust the flow according to demand, avoid energy waste and maintain the efficient operation of the hydraulic system.
Working environment and service life
When selecting a hydraulic oil pump, it is necessary to consider the influence of the working environment, such as temperature, humidity, dust and other factors. The hydraulic oil pump should have strong anti-pollution ability and good sealing to extend its service life.
In harsh environments, the durability and easy maintenance of the pump are also very important. A hydraulic oil pump with a long service life and maintenance cycle should be selected.
