Device for separating solid phase and liquid phase of oil-based drilling fluid through screening

Abstract

The invention discloses a device for separating a solid phase and a liquid phase of oil-based drilling fluid through screening. The device comprises a screen frame, a screen, a guide rail and a slide block. A plurality of fixed baffles are arranged on the screen frame. Springs perpendicular to the fixed baffles are installed on the side faces, facing the inlet of the screen, of the fixed baffles and connected with buffering cushions. The device further comprises movable baffles parallel to the fixed baffles. The portions, located on the screen frame, of the movable baffles are provided with rotating shafts parallel to the normal direction of the screen frame. Threads are formed in the side faces, close to the bottom ends, of the rotating shafts. The bottom ends of the rotating shafts penetrate through the movable baffles and are inserted in threaded holes in the screen frame. The side faces of the movable baffles make contact with the buffering cushions. By means of the device, the liquid phase and the solid phase in the drilling fluid are further separated, and the screening effect is enhanced; it is avoided that because the liquid phase in the drilling fluid moves together with the solid phase to the outlet of the screen without being separated from the solid phase yet in the screening process, loss of the recyclable liquid phase is caused; the use cost of the drilling fluid is reduced, and the environment is protected.

Description

technical field [0001] The invention relates to the field of drilling fluid recovery, in particular to a device for screening solid-liquid two-phase oil-based drilling fluid. Background technique [0002] Drilling fluid is a general term for various circulating fluids used in the drilling process, and drilling fluid is also called drilling mud. During the drilling process, the drilling fluid can effectively cool and lubricate the drill bit, and can also balance the underlying pressure to avoid blowout and kick. In addition, the drilling fluid can also transmit power and take coring samples. According to different dispersion media, drilling fluids are mainly divided into three categories: water-based drilling fluids, oil-based drilling fluids and gas-based drilling fluids. [0003] During the drilling process, the drilling fluid enters the bottom layer through the drill pipe, and after completing its function, it is discharged together with the slag generated in the drilling...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is aimed at the shortcomings of the traditional drilling fluid shale shaker screening mechanism. The solid phase particles and the liquid phase leave the screen before they have time to separate, resulting in the loss of the recoverable liquid phase in the drilling fluid

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