HIGH-FREQUENCY VIBRATING SIEVE WITH ENERGY-SAVING RESONANT VIBRATORY DRIVE FOR INTENSIVE TREATMENT OF DRILLING MUD AND DRYING OF DRILL CUTTINGS Russian patent published in 2015 - IPC B07B1/40 E21B21/06 

FIELD: oil and gas industry.

SUBSTANCE: vibrating sieve with energy-saving resonant vibratory drive for intensive treatment of drilling mud and drying of drill cuttings comprises a bedplate, vibrating frame with replaceable sieve cassettes fixed at it, vibrator of linear vibrations, four springs at which the vibrating frame is installed at the bedplate, device fixing sieve cassettes at the vibrating frame, device for regulation of tilt angle of the vibrating frame, gate with control mechanism, tray with outlet ports for treated drill fluid, which is placed at the bedplate, receiving tank for drill fluid, which contains inlet nozzle with flange at input for the purpose of drill fluid supply to the vibrating frame and at output it is equipped with a rack with openings for even distribution of drill fluid along width of the sieve cassette receiving drill fluid for treatment. The vibrator is installed at the vibrating frame so that angle between surface of sieve cassettes and straight line of vibrator force direction is equal to 45°. The vibrator of linear vibrations is made as two single-pulse resonant vibrators with solenoid drive installed at force plates of the vibrating frame sides; each of single-pulse vibrators is based on electromagnet of pulling type with potential vibrations in armature of the single-pulse vibrator in regard to its stator with vibration swing up to 15 mm. Electromagnets are connected to power supply network through single-pulse vibrators control device, which is made to generate direct-current pulses with adjustable amplitude and frequency of 50 Hz. Pulse amplitude may be adjusted within limits at which amplitude of vibrations for the vibrating frame complies with the adjustable amplitude for the vibrating frame defined as per the following formula: X=Z:W², where X is amplitude of vibrations for the vibrating frame in m, Z is the preset vibration acceleration for the vibrating frame in m/s², W is angular rate of vibrations for the vibrating frame in rad/s; herein W=2πf, where f is frequency of vibrations in Hz. Total weight of the vibrating frame with weight of sieve cassettes, devices fixing sieve cassettes and weight of stator parts for both single-pulse vibrators is at least 7 times more than total weight of armature parts of both single-pulse vibrators.

EFFECT: improved efficiency of drill fluid treatment.

2 cl, 2 dwg