Negative pressure drilling liquid vibration sieve

Abstract

The invention relates to a negative pressure drilling liquid vibration sieve. The negative pressure drilling liquid vibration sieve mainly comprises a sieve frame, exciting motors, a motor seat, frame sieve meshes, sieve mesh tension wedge blocks, flexible negative pressure tubes, sieve surface lower slurry plates, an effusion emptying valve, a drilling fluid discharging pipeline, a vibration sieve base, a negative pressure main header pipe, damping springs, a negative pressure vertical pipe and a vacuum pump, wherein the sieve surface lower slurry plates are supported on a crossbeam and a side beam of the sieve frame; the frame sieve meshes are mounted on the sieve surface lower slurry plates; the frame sieve meshes and the sieve surface lower slurry plates are fixed to the sieve frame through the sieve mesh tension wedge blocks; the lower part of each sieve surface lower slurry plate is connected to the corresponding flexible negative pressure tube; the lower ends of the flexible negative pressure tubes are inserted into and fixed to the negative pressure main header pipe on the vibration sieve base; when the excitation motors rotate, the sieve frame, the excitation motors, the motor seat, the frame sieve meshes, the sieve mesh tension wedge blocks and the sieve surface lower slurry plates vibrate as a whole. Through the processing of the negative pressure drilling liquid vibration sieve, the liquid content of rock debris is low, the structure is simple, the cost is low, the power consumption is low, and a well drilling solid control system can be simplified.

Description

technical field [0001] The invention relates to a negative pressure outlet drilling fluid vibrating screen, which belongs to the technical field of petroleum drilling equipment. Background technique [0002] The drilling fluid shale shakers in the existing drilling solids control system all work under open or semi-open conditions, the screen surface and below the screen surface are both atmospheric pressure, and the flow of drilling fluid through the screen mainly depends on the vibration movement of the screen surface It is realized by the inertial force generated by the drilling fluid and the potential energy of the drilling fluid itself. In order to make the drilling fluid have a greater ability to penetrate the screen, it is usually necessary to increase the vibration intensity of the vibrating screen, but the increase in the vibration intensity will cause serious splashing of the drilling fluid, and at the same time, the solids such as cuttings contained in the drilling...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a negative pressure drilling fluid shale shaker to solve the problems of the existing drilling shale shaker with small processing capacity and high liquid content in the discharged cuttings

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