Mud and sand removal device for drilling fluid

Abstract

The invention relates to a mud and sand removal device for drilling fluid, and belongs to the field of petroleum machinery. The mud and sand removal device for the drilling fluid comprises a rotational flow desilter, a beaker, a valve, a collecting pipe, a desander slurry inlet pipe, a desander overflow pipe, a desilter slurry inlet pipe, a slurry inlet pipe overflow pipe, a vertical pipe, a vertical pipe supporting column, a small screen net, a supporting pipe, a rotational flow desander, a vibrating screen, a stirring device and the like. The valve is opened, the drilling fluid in the collecting pipe flows into the beaker through the valve, and the drilling fluid after mud and sand removal is conveniently sampled to conveniently analyze a using effect of the mud and sand removal device for drilling fluid. The structure is compact, the rotational flow desander and the rotational flow desilter are arranged intensively, so that treated drilling fluid waste solid phase is discharged intensively, and the occupied area of the device is saved. The vertical pipe is arranged in the rotational flow desander, the small screen net is arranged at the lower end of the vertical pipe, mud and sand in the drilling fluid is filtered again by the small screen net, and the rotational flow desander effect of the drilling fluid is enhanced. The small screen net can overturn in the vertical pipe toshake off the mud and sand on the small screen net.

Description

technical field [0001] The invention relates to a mud and sand removal device for drilling fluid, which belongs to the field of petroleum machinery. Background technique [0002] The solid particles in the mud drilling fluid are divided into harmful solid phase and useful solid phase. Cuttings are the most important harmful solid phase in the mud drilling fluid, and their density is higher than other components in the drilling fluid. It will affect the physical properties of the drilling fluid, and increase the density, viscosity, dynamic shear force, water loss, mud cake, abrasiveness, viscosity and flow resistance of the drilling fluid. During the drilling process, the cuttings will also damage the oil and gas layers. Reduce the drilling speed, increase the torque of the turntable, and the tripping and tripping encounter resistance, causing sticking and sticking, causing downhole complex situations such as lost circulation and blowout. At the same time, cuttings in the mud...

AI Technical Summary

Problems solved by technology

[0002] The solid particles in the mud drilling fluid are divided into harmful solid phase and useful solid phase. Cuttings are the most important harmful solid phase in the mud drilling fluid, and their density is higher than other components in the drilling fluid. It will affect the physical properties of the drilling fluid, and increase the density, viscosity, dynamic shear force, water loss, mud cake, abrasiveness, viscosity and flow resistance of the drilling fluid. During the drilling process, the cuttings will also damage the oil and gas layers. Reduce the drilling speed, increase the torque of the rotary table, and encounter resistance when tripping and tripping, causing sticking and stuck pipe, causing downhole complex situations such as lost circulation and blowout, and at the same time, cuttings in the mud drilling fluid will cause serious wear and tear on the circulation system

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