Primary solid control device for offshore drilling well

Abstract

The invention discloses a primary solid control device for an offshore drilling well. The primary solid control device comprises a screening box, a vibrating motor, a supporting plate, a blocking hood and a blowout prevention device. A feed inlet is formed in the upper portion of one end of the screening box, a solid phase discharge outlet is formed in the other end of the screening box, a screen frame is arranged in the screening box, and a screen is arranged in the screen frame. A liquid phase discharging box communicating with the screening box is arranged below the solid phase discharge outlet, a liquid phase discharge outlet is formed in the bottom of the liquid phase discharging box, and the side face of the liquid phase discharging box is connected with a suction pipe which is connected with a suction fan. A plurality of spring baffle devices are arranged on the screen frame at equal intervals in the direction from the feed inlet to the solid phase discharge outlet. By means of the primary solid control device, after drilling fluid impacts the screen, the liquid phase with the solid phase particles removed can enter the space below the screen more easily, the screen is prevented from being blocked, and the drilling fluid treatment amount of the drilling fluid vibratory screen is increased; and airflow enables the impact impulsive force to be increased when the drilling fluid impacts the screen, and the solid phase particles and the liquid phase can be separated more easily.

Description

Technical field [0001] The invention relates to the field of drilling fluid recovery, in particular to a primary solids control device used for offshore drilling oil wells. Background technique [0002] Drilling fluid is the 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 blowouts and kicks. In addition, the drilling fluid can also transmit power and core sampling. 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 is discharged with the waste slag generated during the drilling after completing its action. Since the drill...

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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. The sieve holes on the net lead to the loss of recoverable liquid phase in the drilling fluid, the reduction of the processing capacity of the drilling fluid shale shaker and the problem of easy damage to the screen

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