Drilling fluid applications of oil drilling solids control equipment

　　Primary purification: vibratory screen → Secondary purification: vacuum degasser → Tertiary purification: desander → Quaternary purification: desilter → Quintary purification: centrifugal dewatering machine

　　Mud Oil Drilling Solid Control Equipment The system also includes a water-jet mixing unit, a stirring device, mud tanks, mud guns, and other components. When this system is delivered to the customer, all gate valves are kept closed. During operation, the customer must strictly follow the following procedure to shut down the system:

　　First, after the mud purification equipment is delivered to the site, the customer will arrange its placement, connection, and integration with supporting facilities based on the on-site conditions. Since this equipment is only a component of the drilling fluid purification and circulation system, its primary functions are to purify and condition the drilling fluid and to provide localized storage for it. Once the equipment is connected to the discharge outlet of the drilling rig’s support frame, a mud tank or mud pit must be provided to store additional mud, ensuring a sufficient supply of drilling fluid for the rig.

　　Drilling Solid Control System

　　Again, each Accessory operates independently with no interference between start-up and standby modes. Customers can use all oil drilling solids control equipment based on the drilling fluid conditions. Once drilling begins and the drilling fluid supply is normal, this system can operate normally.

　　It should be noted that when using a mixing funnel, the feed-disc valve must first be closed. Only after the working-pressure drilling fluid has been normally discharged from the inlet and outlet should the feed-disc valve be opened to terminate the feeding operation. The intensified funnel is of the vortex type; during feeding, efforts should be made to ensure continuous feeding to prevent backflow of slurry. If discharge is obstructed or blockage occurs, feeding should be immediately halted, and the system should be promptly cleaned to determine whether other issues are present. Oil Drilling Solid Control Equipment Minor issues caused.

　　When the shale shaker in the drilling fluid system is shut down, it shall be immediately flushed with clean water; the use of metal tools to scrape coal and rock from the screen mesh is strictly prohibited. Before starting the mud mixing unit, first check that the reducer contains sufficient clean lubricating oil and top it up to the specified level. When concluding sand removal operations or shutting down the high-pressure mud circulation system, first open the gate valve on the water jet pipeline, then reopen the upstream and downstream main valves; upon shutdown, close the main valve first and then the water jet pipeline gate valve to prevent high-pressure fluid from becoming trapped and causing a blockage in the water jet pipeline.

　　Vibrating screen in the solids control system

　　After the vacuum degasser has been put into service, the motor rotor and suction pipe inside the vacuum tank shall be cleaned. The power supply shall be switched off, the sight-glass cover removed, and all components inspected for damage. Any debris in the pipes shall be cleared, and the tank walls and motor rotor shall be washed with a high-pressure water jet.

　　When the hydrocyclones in desanders and desilters are out of service for an extended period, they must be cleaned using a warm-water circulation system to prevent dry sand from accumulating inside the hydrocyclones. After shutdown, the screen mesh should also be cleaned to prevent fine sand from solidifying and rendering the unit unusable on the next start-up.

　　Operators must regularly monitor the ambient temperatures of the bearing housings on both sides of the centrifugal dewatering unit, as well as the transfer case temperature and the sand-discharge condition. When the discharged sand is in a slurry-like consistency and flows continuously without interruption, the separation efficiency of the centrifugal dewatering unit is evident and the load is relatively light, which is highly beneficial for extending the service life of the equipment. However, if the discharged sand is in large clumps, intermittently discharged, and relatively dry, this indicates that the sand content in the drilling fluid is excessively high, resulting in an overburdened centrifugal dewatering unit; in such cases, the separation rate should be appropriately reduced. Failure to do so may lead to overload shutdown of the drive system or elevated temperatures in the main bearings and the transfer case. Similarly, if the temperatures of the main bearings or the transfer case rise, this also signals excessive sand content in the drilling fluid, and the separation rate should be adjusted accordingly.