During the production process of oil drilling, malfunctions frequently occur in the mud pumps of drilling rigs. To ensure the continuous and stable delivery of mud by the F-type drilling mud pump and maintain the normal operation of drilling, it is necessary to conduct troubleshooting and repairs. Today, let's delve into the common faults of the F-type drilling mud pump and the corresponding repair methods.

I. Insufficient Pressure
At the drilling site, the pressure of the mud pump suddenly fails to rise. The reasons for this situation are as follows:
Blockage in the suction pipeline: Rock debris and sediment mixed in the mud accumulate over time, easily clogging the suction pipe and hindering the smooth entry of mud into the pump body. When troubleshooting, first shut down the machine and then inspect the suction pipeline section by section to check for obvious accumulations of foreign matter. The repair method is quite simple. Disassemble the clogged section, clean it thoroughly, and then reinstall it as it was.
Wear of pistons or cylinder liners: After long-term, high-intensity operations, wear and tear of mud pump pistons and cylinder liners are inevitable. Excessive wear significantly reduces the sealing performance between the two, causing the pressure to fail to rise. We can preliminarily judge whether this is the cause of insufficient pressure by observing whether there are metal debris in the discharged mud. Once confirmed, new pistons and cylinder liners that match the specifications should be replaced. When installing, be sure to apply an appropriate amount of lubricant to ensure a tight fit between the piston and the cylinder liner.
Fault in the safety valve: The safety valve is designed to prevent pressure overload during operation. If the safety valve gets stuck in the open position, the pressure will keep discharging. At this time, check the valve core and spring of the safety valve to see if there are any signs of seizure or breakage. If the valve core is stuck, clean the debris and readjust the spring pressure to restore normal operation.
II. Abnormal Flow
Fluctuations in flow, either sudden highs and lows or consistently low levels, can also severely disrupt the drilling process.
Air intake: If the suction end of the mud pump is not tightly sealed, air will enter. We will notice abnormal sounds and vibrations when the mud pump is running. Carefully inspect the connection parts of the suction pipe and the sealing gaskets. Once the air leakage point is found, tighten the bolts or replace the new sealing parts to prevent air from entering.
Unstable pump speed: A fault in the power source may be the cause. Clogged fuel injection nozzles in diesel engines or phase loss in electric motors can lead to unstable pump speeds. Use professional instruments to measure the output power and speed of the power equipment and then solve the corresponding problems. For diesel engines, clean the fuel injection nozzles and calibrate the fuel injection pump; for electric motors, check the circuits to solve the phase loss problem and return the mud pump to a stable operating speed.
Impeller damage: For F-type mud pumps with impellers, if the impeller has cracks or deformations, its ability to transport mud will be immediately weakened. We need to disassemble the pump casing to check the condition of the impeller. If the damage is minor, attempt to repair and calibrate it; if the damage is severe, replace it with a brand-new impeller to ensure the normal operation of mud transportation.
III. Abnormal Noise and Vibration
Harsh noises and severe vibrations from the pump body are warning signs of malfunctions.
Unstable foundation installation: If the installation foundation of the mud pump is uneven or the anchor bolts are loose, abnormal sounds will be emitted during operation. We need to recalibrate the installation position, reinforce the anchor bolts, and place suitable shock-absorbing pads under the base of the mud pump.
Bearing wear: It is common for the balls and raceways of bearings to become worn out and fail due to long-term, high-speed operation. If the mud pump has a high temperature and sharp noises, it can be basically determined that there is a problem with the bearings. At this time, first shut down the machine, then turn the pump shaft by hand to feel the resistance and clearance. If the bearings are severely worn, replace them without hesitation, and adjust the preload according to the specifications during installation.
Foreign matter stuck in the pump: Small pieces of metal or rock debris that get into the mud pump and get stuck in key parts such as the impeller and piston will cause abnormal noises. We need to disassemble the relevant components of the pump body, clean out the foreign matter, and also check the source of the foreign matter entry and take protective measures to prevent a second intrusion.
Although the F-type drilling mud pump has a complex structure, as long as you are familiar with the troubleshooting ideas and repair methods for common faults, you can quickly respond to unexpected situations, minimize downtime, ensure the smooth progress of the drilling project, save costs, and steadily advance the project. Next time you encounter problems with the mud pump, you can conduct troubleshooting according to the above methods.