Particle drilling method

Abstract

A particle drilling method includes steps of: (a) injecting particles, namely injecting slurry and the particles into a well through an injection device; (b) recovering the particles, specifically including steps of: enabling a mixture of particles, rock debris and slurry returned from the well to directly flow into a magnetic separator (10) by a pipeline through a rotational control head at a drill floor; sending separated particles into a storage tank by the magnetic separator (10); and sending a mixture of rock debris and slurry into a slurry tank (11); and (c) injecting the particles in the storage tank into the well through the injection device for drilling again, so as to form a drilling circulation. The above method effectively solves a problem of many slurry leakage points in prior arts and greatly reduces an environmental pollution risk.

Claims

1. A particle drilling method, comprising steps of particle injection and particle recovery, wherein the step of particle injection specifically comprises a step of injecting slurry and particles into a well through an injection device; the step of particle recovery specifically comprises steps of: enabling a mixture of particles, rock debris and slurry returned from the well to directly flow into a recovery device by a pipeline through an exit device at a well mouth of a drill floor with utilizing liquid energy; sending separated particles into a storage tank by a magnetic separator of the recovery device; and sending a mixture of rock debris and slurry into a slurry tank; and after the steps of particle injection and particle recovery, the particles in the storage tank are transported to the injection device and then injected into the well through the injection device for drilling again, so as to form a particle impact drilling circulation.

2. The particle drilling method, as recited in claim 1, wherein in the step of particle injection, a particle injection speed is 0.5-10 kg/s.

3. The particle drilling method, as recited in claim 1, wherein in the step of particle injection, a particle injection pressure is 5-55 MPa.

4. The particle drilling method, as recited in claim 1, wherein: the storage tank is a rotational storage tank, comprising a tank body, blades arranged in the tank body, a support frame, a screen barrel and a motor driving the tank body to rotate; the blades and the support frame are fixed on an inner wall of the tank body; and the screen barrel is connected with the blades through the support frame.

5. The particle drilling method, as recited in claim 1, wherein: the injection device is a double-injection-pump continuous injection device, comprising a particle mixing hopper which is connected with a drilling vertical pipe through a high-pressure pipeline; a reversing pipe is arranged in the particle mixing hopper; the reversing pipe is connected with a swinging hydraulic cylinder which drives the reversing pipe to swing from left to right; a first transporting cylinder and a second transporting cylinder are connected with the particle mixing hopper; when injecting the particles, a first hydraulic cylinder, a second hydraulic cylinder and the swinging hydraulic cylinder are firstly started; the first hydraulic cylinder starts an addition stroke, the swinging hydraulic cylinder swings the reversing pipe to the second transporting cylinder so that the reversing pipe is interconnected with the second transporting cylinder, and the particles and the slurry enter the first transporting cylinder; meanwhile, the second hydraulic cylinder starts a compression stroke that the particles and the slurry in the second transporting cylinder are injected into the high-pressure pipe through the reversing pipe to enter an inner well circulation; the first hydraulic cylinder starts a compression stroke after ending the addition stroke, and the second hydraulic cylinder starts an addition stroke, so as to continuously inject the particles through an alternate operation.

6. The particle drilling method, as recited in claim 5, wherein: the swinging hydraulic cylinder comprises cylinder bodies, pistons, piston rods, a swinging rod and a spline connected with the swinging rod; the pistons are connected with the swinging rod through the respective piston rods; and the reversing pipe is connected with the spline.

7-8. (canceled)

9. The particle drilling method, as recited in claim 5, wherein an arrow-shaped check valve is connected with the high-pressure pipeline.

10. The particle drilling method, as recited in claim 6, wherein an arrow-shaped check valve is connected with the high-pressure pipeline.

11. The particle drilling method, as recited in claim 1, wherein the exit device comprises a rotational sprayer and a rotational control head connected with the rotational sprayer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG. 1 is a structural sketch view of a drilling device according to the present invention.

[0036] FIG. 2 is a structural sketch view of a connection between a double-injection-pump continuous injection device and a drill floor according to the present invention.

[0037] FIG. 3 is a structural sketch view of a swinging hydraulic cylinder according to the present invention.

[0038] FIG. 4 is a structural sketch view of a connection between a double-injection-pump continuous injection device and the drill floor according to a fourth preferred embodiment of the present invention.

[0039] FIG. 5 is a structural sketch view of a reversing pipe according to a fifth preferred embodiment of the present invention.

[0040] FIG. 6 is a structural sketch view of a rotational storage tank according to a sixth preferred embodiment of the present invention.

[0041] In figures: 1: first hydraulic cylinder; 2: second hydraulic cylinder; 3: swinging hydraulic cylinder; 4: reversing pipe; 5: first piston; 6: first transporting cylinder; 7: second piston; 8: second transporting cylinder; 9: high-pressure pipeline; 10: magnetic separator; 11: slurry tank; 12: rotational storage tank; 13: cylinder body; 14: piston; 15: piston rod; 16: swinging rod; 17: spline; 18: arrow-shaped check valve; 19: seal ring; 20: tank body; 21: blade; 22: support frame; 23: screen barrel; 24: motor; 25: particle mixing hopper; 26: rotational control head; 27: rotational sprayer; and 28: exit device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

First Preferred Embodiment

[0042] Referring to FIG. 1, a particle drilling method comprises steps of particle injection and particle recovery, wherein: the step of particle injection is to inject slurry and particles into a well through an injection device; the step of particle recovery is to enable a mixture of particles, rock debris and slurry returned from the well to directly flow into a recovery device by a pipeline through an exit device 28 at a well mouth of a drill floor with liquid energy, then send separated particles into a storage tank by a magnetic separator 10 of the recovery device, and send a mixture of rock debris and slurry into a slurry tank 11; after the steps of particle injection and particle recovery, the particles in the storage tank are transported to the injection device and injected into the well through the injection device for drilling again, so as to form a particle impact drilling circulation.

[0043] The first preferred embodiment illustrates a most basic implementation method, and the adopted injection device and storage tank are conventional. Through the step of particle recovery, the mixture of particles, rock debris and slurry returned from the well directly flows into the magnetic separator of the recovery device for particle separation, which simplifies a particle screening process. Because the slurry and the rock debris do not contain ferromagnetic materials, the particles are easily separated by the magnetic separator, having advantages of high separation efficiency and good separation effect. After separating the particles, the magnetic separator directly transports the separated particles to the storage tank for recycling. Compared with the prior arts, under a premise of not changing a conventional drilling process, a particle recovery process is simplified; devices which easily cause a slurry leakage, such as a jet mixer, an associated low-pressure pipeline, a vibrating screen and a rock debris storage hopper, are avoided; an installation efficiency, an operation convenience and a maintenance convenience of the recovery system are effectively improved; a working efficiency of particle impact drilling is greatly increased; a problem of many slurry leakage points, caused by firstly pumping the mixture of rock debris and slurry into a drilling crew vibrating screen and then transporting to the recovery device, is effectively solved; and an environmental pollution risk is greatly reduced.

Second Preferred Embodiment

[0044] Referring to FIG. 1 and FIG. 2, a particle drilling method comprises steps of particle injection and particle recovery, wherein: the step of particle injection is to inject slurry and particles into a well through an injection device; the step of particle recovery is to enable a mixture of particles, rock debris and slurry returned from the well to directly flow into a recovery device by a pipeline through an exit device 28 at a well mouth of a drill floor with liquid energy, then send separated particles into a storage tank by a magnetic separator 10 of the recovery device, and send a mixture of rock debris and slurry into a slurry tank 11; after the steps of particle injection and particle recovery, the particles in the storage tank are transported to the injection device and injected into the well through the injection device for drilling again, so as to form a particle impact drilling circulation.

[0045] In the step of particle injection, a particle injection speed is 0.5 kg/s.

[0046] In the step of particle injection, a particle injection pressure is 5 MPa.

[0047] The injection device is a double-injection-pump continuous injection device, comprising a first hydraulic cylinder 1, a second hydraulic cylinder 2, a swinging hydraulic cylinder 3, a reversing pipe 4, a first piston 5, a first transporting cylinder 6, a second piston 7 and a second transporting cylinder 8, and further comprising a particle mixing hopper 25 which is connected with a drilling vertical pipe through a high-pressure pipeline 9, wherein: the reversing pipe 4 is arranged in the particle mixing hopper 25; the reversing pipe 4 is connected with the swinging hydraulic cylinder 3 which drives the reversing pipe 4 to swing from left to right; the particle mixing hopper 25 is connected with the first transporting cylinder 6 and the second transporting cylinder 7; the first hydraulic cylinder 1, the second hydraulic cylinder 2 and the swinging hydraulic cylinder 3 are firstly started; the first hydraulic cylinder 1 starts an addition stroke, the swinging hydraulic cylinder 3 swings the reversing pipe 4 to the second transporting cylinder 8 so that the reversing pipe is interconnected with the second transporting cylinder, and a mixture of particles and slurry enters the first transporting cylinder 6; meanwhile, the second hydraulic cylinder 2 starts a compression stroke that a mixture of particles and slurry in the second transporting cylinder 8 is injected into the high-pressure pipeline 9 through the reversing pipe 4 to enter an inner well circulation; the first hydraulic cylinder 1 starts a compression stroke after ending the addition stroke, and the second hydraulic cylinder 2 starts an addition stroke, so that a continuous injection is realized through an alternate operation.

[0048] According to the second preferred embodiment, when injecting the particles, the first hydraulic cylinder, the second hydraulic cylinder and the swinging hydraulic cylinder are firstly started; the first hydraulic cylinder starts the addition stroke, the swinging hydraulic cylinder swings the reversing pipe to the second transporting cylinder so that the reversing pipe is interconnected with the second transporting cylinder, and the particles and the slurry enter the first transporting cylinder; meanwhile, the second hydraulic cylinder starts the compression stroke that the particles and the slurry in the second transporting cylinder are injected into the high-pressure pipeline through the reversing pipe to enter the inner well circulation; the first hydraulic cylinder starts the compression stroke after ending the addition stroke, and the second hydraulic cylinder starts the addition stroke, so that the continuous injection is realized through the alternate operation, which guarantees a continuity of particle injection in the well, avoids the first transporting cylinder and the second transporting cylinder being blocked due to particle deposition, and effectively increases a working efficiency of particle impact drilling. In the double-injection-pump continuous injection device, merely the first transporting cylinder, the second transporting cylinder and the reversing pipe are in a high-pressure state, which greatly reduces a high-pressure area and improves safety.

Third Preferred Embodiment

[0049] Referring to FIG. 1, FIG. 3 and FIG. 4, a particle drilling method comprises steps of particle injection and particle recovery, wherein: the step of particle injection is to inject slurry and particles into a well through an injection device; the step of particle recovery is to enable a mixture of particles, rock debris and slurry returned from the well to directly flow into a recovery device by a pipeline through an exit device 28 at a well mouth of a drill floor with liquid energy, then send separated particles into a storage tank by a magnetic separator 10 of the recovery device, and send a mixture of rock debris and slurry into a slurry tank 11; after the steps of particle injection and particle recovery, the particles in the storage tank are transported to the injection device and injected into the well through the injection device for drilling again, so as to form a particle impact drilling circulation.

[0050] In the step of particle injection, a particle injection speed is 2 kg/s.

[0051] In the step of particle injection, a particle injection pressure is 20 MPa.

[0052] The injection device is a double-injection-pump continuous injection device, comprising a first hydraulic cylinder 1, a second hydraulic cylinder 2, a swinging hydraulic cylinder 3, a reversing pipe 4, a first piston 5, a first transporting cylinder 6, a second piston 7 and a second transporting cylinder 8, and further comprising a particle mixing hopper 25 which is connected with a drilling vertical pipe through a high-pressure pipeline 9, wherein: the reversing pipe 4 is arranged in the particle mixing hopper 25; the reversing pipe 4 is connected with the swinging hydraulic cylinder 3 which drives the reversing pipe 4 to swing from left to right; the particle mixing hopper 25 is connected with the first transporting cylinder 6 and the second transporting cylinder 7; the first hydraulic cylinder 1, the second hydraulic cylinder 2 and the swinging hydraulic cylinder 3 are firstly started; the first hydraulic cylinder 1 starts an addition stroke, the swinging hydraulic cylinder 3 swings the reversing pipe 4 to the second transporting cylinder 8 so that the reversing pipe is interconnected with the second transporting cylinder, and a mixture of particles and slurry enters the first transporting cylinder 6; meanwhile, the second hydraulic cylinder 2 starts a compression stroke that a mixture of particles and slurry in the second transporting cylinder 8 is injected into the high-pressure pipeline 9 through the reversing pipe 4 to enter an inner well circulation; the first hydraulic cylinder 1 starts a compression stroke after ending the addition stroke, and the second hydraulic cylinder 2 starts an addition stroke, so that a continuous injection is realized through an alternate operation.

[0053] The swinging hydraulic cylinder 3 comprises cylinder bodies 13, pistons 14, piston rods 15, a swinging rod 16 and a spline 17 connected with the swinging rod 16, wherein: the pistons 14 are connected with the swinging rod 16 through the respective piston rods 15; and the reversing pipe 4 is connected with the spline 17.

[0054] An arrow-shaped check valve 18 is connected with the high-pressure pipeline 9.

[0055] According to the third preferred embodiment, the swinging hydraulic cylinder comprises the cylinder bodies, the pistons, the piston rods, the swinging rod and the spline connected with the swinging rod, wherein the pistons are connected with the swinging rod through the respective piston rods; and the reversing pipe is connected with the spline. Through the swinging hydraulic cylinder having the above specific structure, the swinging rod enables the reversing pipe to change a direction flexibly, having an advantage of flexibly reversing; and moreover, through structures of the spline and the swinging rod, a service life is lengthened. The arrow-shaped check valve is connected with the high-pressure pipeline. With the arrow-shaped check valve, the mixture of particles and slurry is able to smoothly enter the well through the high-pressure pipeline; and, the mixture of particles and slurry is avoided reversely entering the first transporting cylinder or the second transporting cylinder, which effectively avoids a damage to people caused by a slurry leakage during a particle injection process and further improves safety.

Fourth Preferred Embodiment

[0056] Referring to FIG. 1, FIG. 3, FIG. 4 and FIG. 5, a particle drilling method comprises steps of particle injection and particle recovery, wherein: the step of particle injection is to inject slurry and particles into a well through an injection device; the step of particle recovery is to enable a mixture of particles, rock debris and slurry returned from the well to directly flow into a recovery device by a pipeline through an exit device 28 at a well mouth of a drill floor with liquid energy, then send separated particles into a storage tank by a magnetic separator 10 of the recovery device, and send a mixture of rock debris and slurry into a slurry tank 11; after the steps of particle injection and particle recovery, the particles in the storage tank are transported to the injection device and injected into the well through the injection device for drilling again, so as to form a particle impact drilling circulation.

[0057] In the step of particle injection, a particle injection speed is 6 kg/s.

[0058] In the step of particle injection, a particle injection pressure is 30 MPa.

[0059] The injection device is a double-injection-pump continuous injection device, comprising a first hydraulic cylinder 1, a second hydraulic cylinder 2, a swinging hydraulic cylinder 3, a reversing pipe 4, a first piston 5, a first transporting cylinder 6, a second piston 7 and a second transporting cylinder 8, and further comprising a particle mixing hopper 25 which is connected with a drilling vertical pipe through a high-pressure pipeline 9, wherein: the reversing pipe 4 is arranged in the particle mixing hopper 25; the reversing pipe 4 is connected with the swinging hydraulic cylinder 3 which drives the reversing pipe 4 to swing from left to right; the particle mixing hopper 25 is connected with the first transporting cylinder 6 and the second transporting cylinder 7; the first hydraulic cylinder 1, the second hydraulic cylinder 2 and the swinging hydraulic cylinder 3 are firstly started; the first hydraulic cylinder 1 starts an addition stroke, the swinging hydraulic cylinder 3 swings the reversing pipe 4 to the second transporting cylinder 8 so that the reversing pipe is interconnected with the second transporting cylinder, and a mixture of particles and slurry enters the first transporting cylinder 6; meanwhile, the second hydraulic cylinder 2 starts a compression stroke that a mixture of particles and slurry in the second transporting cylinder 8 is injected into the high-pressure pipeline 9 through the reversing pipe 4 to enter an inner well circulation; the first hydraulic cylinder 1 starts a compression stroke after ending the addition stroke, and the second hydraulic cylinder 2 starts an addition stroke, so that a continuous injection is realized through an alternate operation.

[0060] The swinging hydraulic cylinder 3 comprises cylinder bodies 13, pistons 14, piston rods 15, a swinging rod 16 and a spline 17 connected with the swinging rod 16, wherein: the pistons 14 are connected with the swinging rod 16 through the respective piston rods 15; and the reversing pipe 4 is connected with the spline 17.

[0061] An arrow-shaped check valve 18 is connected with the high-pressure pipeline 9.

[0062] Furthermore, the first hydraulic cylinder 1 and the second hydraulic cylinder 2 are both dual-rod hydraulic cylinders; two seal rings 19 are connected with the reversing pipe 4 and respectively arranged at two ends of the reversing pipe 4.

[0063] According to the fourth preferred embodiment, the first hydraulic cylinder and the second hydraulic cylinder are both dual-rod hydraulic cylinders, so that a uniform reciprocating motion is realized, synchronization between the addition stoke and the compression stroke is easily realized, and a stability of particle continuous injection into the well is improved, thereby guaranteeing a working efficiency of particle drilling. Two seal rings are connected with the reversing pipe and respectively arranged at the two ends of the reversing pipe. When the reversing pipe is interconnected with the first transporting cylinder or the second transporting cylinder, the seal rings are able to avoid a pressure leakage in the first transporting cylinder or the second transporting cylinder, so that the addition stroke and the compression stoke proceed stably and the particles are guaranteed to be smoothly injected into the well.

Fifth Preferred Embodiment

[0064] Referring to FIG. 1, FIG. 3, FIG. 4 and FIG. 5, a particle drilling method comprises steps of particle injection and particle recovery, wherein: the step of particle injection is to inject slurry and particles into a well through an injection device; the step of particle recovery is to enable a mixture of particles, rock debris and slurry returned from the well to directly flow into a recovery device by a pipeline through an exit device 28 at a well mouth of a drill floor with liquid energy, then send separated particles into a storage tank by a magnetic separator 10 of the recovery device, and send a mixture of rock debris and slurry into a slurry tank 11; after the steps of particle injection and particle recovery, the particles in the storage tank are transported to the injection device and injected into the well through the injection device for drilling again, so as to form a particle impact drilling circulation.

[0065] In the step of particle injection, a particle injection speed is 8 kg/s.

[0066] In the step of particle injection, a particle injection pressure is 40 MPa.

[0067] The injection device is a double-injection-pump continuous injection device, comprising a first hydraulic cylinder 1, a second hydraulic cylinder 2, a swinging hydraulic cylinder 3, a reversing pipe 4, a first piston 5, a first transporting cylinder 6, a second piston 7 and a second transporting cylinder 8, and further comprising a particle mixing hopper 25 which is connected with a drilling vertical pipe through a high-pressure pipeline 9, wherein: the reversing pipe 4 is arranged in the particle mixing hopper 25; the reversing pipe 4 is connected with the swinging hydraulic cylinder 3 which drives the reversing pipe 4 to swing from left to right; the particle mixing hopper 25 is connected with the first transporting cylinder 6 and the second transporting cylinder 7; the first hydraulic cylinder 1, the second hydraulic cylinder 2 and the swinging hydraulic cylinder 3 are firstly started; the first hydraulic cylinder 1 starts an addition stroke, the swinging hydraulic cylinder 3 swings the reversing pipe 4 to the second transporting cylinder 8 so that the reversing pipe is interconnected with the second transporting cylinder, and a mixture of particles and slurry enters the first transporting cylinder 6; meanwhile, the second hydraulic cylinder 2 starts a compression stroke that a mixture of particles and slurry in the second transporting cylinder 8 is injected into the high-pressure pipeline 9 through the reversing pipe 4 to enter an inner well circulation; the first hydraulic cylinder 1 starts a compression stroke after ending the addition stroke, and the second hydraulic cylinder 2 starts an addition stroke, so that a continuous injection is realized through an alternate operation.

[0068] The swinging hydraulic cylinder 3 comprises cylinder bodies 13, pistons 14, piston rods 15, a swinging rod 16 and a spline 17 connected with the swinging rod 16, wherein: the pistons 14 are connected with the swinging rod 16 through the respective piston rods 15; and the reversing pipe 4 is connected with the spline 17.

[0069] An arrow-shaped check valve 18 is connected with the high-pressure pipeline 9.

[0070] The first hydraulic cylinder 1 and the second hydraulic cylinder 2 are both dual-rod hydraulic cylinders; two seal rings 19 are connected with the reversing pipe 4 and respectively arranged at two ends of the reversing pipe 4.

[0071] Furthermore, a cross section of the reversing pipe 4 is S-shaped.

[0072] According to the fifth preferred embodiment, the cross section of the reversing pipe is S-shaped. Through the specific S-shaped reversing pipe, a reversing process becomes more flexible and convenient. The reversing pipe is able to rapidly connect with the first transporting cylinder or the second transporting cylinder, so as to guarantee a continuity of particle injection.

Sixth Preferred Embodiment

[0073] Referring to FIG. 1, FIG. 3, FIG. 4, FIG. 5 and FIG. 6, a particle drilling method comprises steps of particle injection and particle recovery, wherein: the step of particle injection is to inject slurry and particles into a well through an injection device; the step of particle recovery is to enable a mixture of particles, rock debris and slurry returned from the well to directly flow into a recovery device by a pipeline through an exit device 28 at a well mouth of a drill floor with liquid energy, then send separated particles into a storage tank by a magnetic separator 10 of the recovery device, and send a mixture of rock debris and slurry into a slurry tank 11; after the steps of particle injection and particle recovery, the particles in the storage tank are transported to the injection device and injected into the well through the injection device for drilling again, so as to form a particle impact drilling circulation.

[0074] In the step of particle injection, a particle injection speed is 10 kg/s.

[0075] In the step of particle injection, a particle injection pressure is 55 MPa.

[0076] The injection device is a double-injection-pump continuous injection device, comprising a first hydraulic cylinder 1, a second hydraulic cylinder 2, a swinging hydraulic cylinder 3, a reversing pipe 4, a first piston 5, a first transporting cylinder 6, a second piston 7 and a second transporting cylinder 8, and further comprising a particle mixing hopper 25 which is connected with a drilling vertical pipe through a high-pressure pipeline 9, wherein: the reversing pipe 4 is arranged in the particle mixing hopper 25; the reversing pipe 4 is connected with the swinging hydraulic cylinder 3 which drives the reversing pipe 4 to swing from left to right; the particle mixing hopper 25 is connected with the first transporting cylinder 6 and the second transporting cylinder 7; the first hydraulic cylinder 1, the second hydraulic cylinder 2 and the swinging hydraulic cylinder 3 are firstly started; the first hydraulic cylinder 1 starts an addition stroke, the swinging hydraulic cylinder 3 swings the reversing pipe 4 to the second transporting cylinder 8 so that the reversing pipe is interconnected with the second transporting cylinder, and a mixture of particles and slurry enters the first transporting cylinder 6; meanwhile, the second hydraulic cylinder 2 starts a compression stroke that a mixture of particles and slurry in the second transporting cylinder 8 is injected into the high-pressure pipeline 9 through the reversing pipe 4 to enter an inner well circulation; the first hydraulic cylinder 1 starts a compression stroke after ending the addition stroke, and the second hydraulic cylinder 2 starts an addition stroke, so that a continuous injection is realized through an alternate operation.

[0077] The swinging hydraulic cylinder 3 comprises cylinder bodies 13, pistons 14, piston rods 15, a swinging rod 16 and a spline 17 connected with the swinging rod 16, wherein: the pistons 14 are connected with the swinging rod 16 through the respective piston rods 15; and the reversing pipe 4 is connected with the spline 17.

[0078] An arrow-shaped check valve 18 is connected with the high-pressure pipeline 9.

[0079] The first hydraulic cylinder 1 and the second hydraulic cylinder 2 are both dual-rod hydraulic cylinders; two seal rings 19 are connected with the reversing pipe 4 and respectively arranged at two ends of the reversing pipe 4.

[0080] A cross section of the reversing pipe 4 is S-shaped.

[0081] Furthermore, the storage tank is a rotational storage tank 12, comprising a tank body 20, blades 21 arranged in the tank body 20, a support frame 22, a screen barrel 23 and a motor 24 driving the tank body 20 to rotate, wherein: the blades 21 and the support frame 22 are fixed on an inner wall of the tank body 20; the screen barrel 23 is connected with the blades 21 through the support frame 22.

[0082] Furthermore, the exit device 28 comprises a rotational sprayer 27 and a rotational control head 26 connected with the rotational sprayer 27.

[0083] According to the sixth preferred embodiment, the rotational storage tank comprises the tank body, the blades in the tank body, the support frame, the screen barrel and the motor driving the tank body to rotate, wherein: the blades and the support frame are fixed on the inner wall of the tank body; and the screen barrel is connected with the blades through the support frame. Through the rotational storage tank having the unique structure, when rotating positively, dynamic storage is realized, and the particles are avoided being agglomerated during a rotational storage process; when rotating negatively, particle discharging is realized, and the blades enable the particles to be uniformly discharged out. Through the step of particle recovery, the mixture of particles, rock debris and slurry returned from the well directly flows into the magnetic separator of the recovery device through the rotational control head 26 of the exit device 28 for particle separation, which simplifies a particle screening process. Because the slurry and the rock debris do not contain ferromagnetic materials, the particles are easily separated by the magnetic separator, having advantages of high separation efficiency and good separation effect. After separating the particles, the magnetic separator directly transports the separated particles to the storage tank for recycling. Compared with the prior arts, under a premise of not changing a conventional drilling process, a particle recovery process is simplified; devices which easily cause a slurry leakage, such as a jet mixer, an associated low-pressure pipeline, a vibrating screen and a rock debris storage hopper, are avoided; an installation efficiency, an operation convenience and a maintenance convenience of the recovery system are effectively improved; a working efficiency of particle impact drilling is greatly increased; a problem of many slurry leakage points, caused by firstly pumping the mixture of rock debris and slurry into a drilling crew vibrating screen and then transporting to the recovery device, is effectively solved; and an environmental pollution risk is greatly reduced. Through adopting the specific injection speed, performance of drilling fluid during the drilling process is guaranteed; and at the specific injection speed, a particle impact frequency of the particles hitting the rock is larger than 10 million times per minute, which achieves a good impact rock breaking effect and increases a drilling efficiency. Under the specific injection pressure, the injection speed of the particles is effectively guaranteed, the drilling efficiency is increased, a drilling vertical pipe is effectively avoided being damaged, and a working stability of particle drilling is guaranteed.