Magnetic flux dynamic adjustment system and method for particle impact drilling

Abstract

The invention discloses a magnetic flux dynamic adjustment system and method for particle impact drilling, and belongs to the technical field of petroleum drilling. The magnetic flux dynamic adjustment system comprises a feeding pipeline, a magnetic separator, a magnetic flux dynamic adjustment mechanism and a controller, wherein the magnetic flux dynamic adjustment mechanism is arranged in the magnetic separator (4), the controller is electrically connected with the magnetic flux dynamic adjustment mechanism so as to realize signal interaction, the magnetic flux dynamic adjustment mechanism is used for monitoring the rotation of a magnetic separation cylinder (41) and the remaining quantity of particles in a magnetic separation trough body, and the controller is used for controlling the magnetic flux of the magnetic separation cylinder (41) so as to be matched with the remaining quantity of the particles. The beneficial effects of the invention are that the magnetic flux can be adaptively and dynamically adjusted based on the remaining quantity of accumulated particles, magnetic separation requirements of working conditions such as different segments, discharge capacities and particle concentrations so as to achieve the optimal working efficiency, the stable operation is ensured, excessive energy consumption can be avoided, the economic benefits are improved, and the applicability and economy of the magnetic separation system are enhanced.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a magnetic flux dynamic adjustment system and method for particle impact drilling. Background technique [0002] Particle impact drilling technology is a new cutting-edge drilling technology in the petroleum exploration industry. It mainly uses steel ball particles with a diameter of 1 to 3 mm to impact rocks at high speed and high frequency, and quickly breaks rocks with the help of instantaneous force, so as to achieve drilling in hard and difficult-to-drill formations. efficient drilling. The particle impact drilling technology is applied based on the particle impact drilling system. The particle impact drilling system mainly includes a particle injection system and a particle separation system. Particles are separated from the mixed slurry and re-injected into the bottom of the well to increase the utilization rate of particles to achieve recycling. [0003] At p...

AI Technical Summary

Problems solved by technology

[0004] Due to the increase of downhole footage and changes in lithology, the particles produced by the PID bit in different layers are also different. In addition, the composition of the drilling fluid also needs to be adjusted and changed. Therefore, the characteristics of the mixed slurry returned from the downhole and the proportion of particles are constantly changing. Change, however, when the existing magnetic separator separates the particles by magnetic separation, the magnetic flux of the magnetic separation cylinder is fixed, and the following two problems may occur: one, the magnetic field of the magnetic separation cylinder is relatively weak, and the magnetic flux of the magnetic separation cylinder The adsorption speed of the magnetic separation is lower than the accumulation speed of the particles. If the particles accumulate too much in the magnetic separation tank, it is easy to cause the blockage of the magnetic separation tank and even damage the magnetic separator. Second, the magnetic field of the magnetic separation cylinder is relatively strong, and the magnetic separation cylinder The magnetic separation adsorption speed is greater than the particle accumulation speed, and the magnetic field generated by the magnetic separation cylinder is excessive, resulting in excessive energy consumption and poor economy

Images