Device for separating solid and liquid phases in drilling mud

Abstract

The invention discloses a device for separation of a solid phase and a liquid phase in drilling fluid. The device comprises a sieve box, a vibration motor, tension springs, a blowout preventer and a shield. Two ends of the sieve box are provided with a feeding port and a discharging port respectively, a sieve frame and a coarse screen are arranged in the sieve box, a fine screen is arranged below the coarse screen, concave grooves are formed between the coarse screen and the fine screen and provided with through holes and extend from the discharging port to the feeding port, and a liquid phase receiving plate is arranged in the concave grooves and parallel to the coarse screen. The device further comprises studs which pass through the through holes of the concave grooves to penetrate the liquid phase receiving plate, and a plurality of spring stop devices are arranged at equal intervals on the sieve frame. The device has the advantages that in an early stage of exploitation, screening speed of the liquid phase in the drilling fluid is increased, and treatment capacity of a drilling fluid vibration sieve is improved; in a later stage of exploitation, even solid-phase particles are smaller in size, the drilling fluid can be screened by the screens, and accordingly separation efficiency of the drilling fluid vibration sieve is improved.

Description

technical field [0001] The invention relates to the field of drilling fluid recovery, in particular to a device for separating solid and liquid phases in drilling mud. 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. Becau...

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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, and the purpose is to provide a device for separating the solid-liquid two phases in the drilling mud, so as to solve the problem that the sieve hole size does not change during the screening process of the traditional drilling fluid shale shaker. It leads to the problem of low screening efficiency when dealing with large-volume solid particles in the drilling fluid in the early stage of drilling and small-volume solid particles in the later stage

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