The sand pump designed and manufactured by our company is mainly used for sand production in local layers or fracturing sand to form sand plugs. When it affects the normal operation of oil wells, the sand is extracted from the well to restore normal operation.
Structure and working principle
- Lower the sand pump to the sand surface position, use the surface drilling rig as the power, and use the oil pipe (or small drill pipe) to drive the sand pump to move up and down back and forth. When the piston moves upwards, the swimming valve on the piston closes, and a certain degree of vacuum is generated at the lower part of the piston. Due to the pressure difference, a large amount of sand is forced to accumulate at the bottom of the well, and the well fluid enters the settling tail pipe along the inner hole of the drill bit. The well fluid returns to the wellbore through the water hole of the swimming valve cover on the sand pump.
When the piston moves downwards, the pressure inside the lower pump barrel of the piston increases, the fixed valve closes, the movable valve on the piston opens, and the well fluid enters the upper part of the piston.
- When pumping multiple times and the tail pipe is exposed outside the well sand, the sand pump can be moved underground until the tail pipe is submerged in the well sand. When the settling pipe is full of sand, the sand pump can be lifted out of the ground, the sand poured out, and then lowered into the well to continue pumping sand.
- If the sand plug is very hard, sand can be extracted by rotating the pipe column with hydraulic pliers for 2-3 minutes under a pressure of 50KN. During the process of rotating the pipe column with hydraulic pliers, the pipe column drives the piston rod of the sand pump to rotate, which drives the drill bit to rotate and break the hard sand plug.
Main technical parameters
- Sand pump stroke：9m
- Connecting screw threads:2TBG
- Inner diameter of pump barrelφ83mm；Outer diameterφ100mm
- Inner diameter of pump barrelφ95mm；Outer diameterφ110mm
