A pulsed negative pressure drilling shale shaker

Abstract

The invention discloses a pulse negative pressure drilling vibrating screen, belonging to the technical field of petroleum drilling solid phase control, which comprises: a base, a screening device, a negative pressure device, a pulse distributor and a liquid discharge device; the screening device includes a The first sieve, the second sieve, and the third sieve are arranged in sequence in the direction to the entrance, and the bottoms of the first sieve and the second sieve are respectively communicated with the first vacuum plate and the second vacuum plate; the negative pressure device is set On the base, the pulse dispenser communicates with the negative pressure device, the first vacuum plate and the second vacuum plate respectively. When working, the pulse dispenser forms a pulsed negative pressure on the first vacuum plate and the second vacuum plate; the liquid discharge device communicate with the first vacuum disk and the second vacuum disk respectively. The invention uses the pulse dispenser to alternately generate negative pressure inside the first vacuum plate and the second vacuum plate, reduces the screening of critical particles, improves the recovery efficiency of drilling fluid, and at the same time fully exerts the working capacity of the negative pressure device to realize High peak negative pressure under the screen.

Description

technical field [0001] The invention relates to the technical field of oil drilling solid phase control, in particular to a pulse negative pressure drilling vibrating screen. Background technique [0002] In the oil drilling process, drill cuttings will be brought out, the liquid content of the drill cuttings is high, the follow-up environmental protection treatment workload is heavy, and the cost is high. At present, negative pressure drilling shale shakers are generally used to greatly reduce the liquid content of the drill cuttings, effectively Recovering drilling fluid and reducing the volume of cuttings for environmental protection have significant economic and social benefits. [0003] In the existing constant negative pressure drilling shale shaker technology, the negative pressure peak value is limited by the conveying speed of cuttings on the screen surface during use, and after a period of use, some critical particles are stuck in the screen holes and screen pluggi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pulsed negative pressure drilling shale shaker to solve the problem that the negative pressure peak value of the existing negative pressure drilling shale shaker is limited, resulting in low negative pressure adsorption efficiency of drilling fluid

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