A distributed laser assisted ultrasonic coaxial coring device

Abstract

The utility model provides a kind of dispersed laser-assisted ultrasonic coaxial coring device, it is related to drilling equipment technical field, including: shell;Laser irradiation module, including optical isolator and the lens being arranged below optical isolator;And ultrasonic drilling module, including ultrasonic transducer, spiral groove amplitude rod and coring drill bit, coring drill bit includes drill cylinder and hollow drill rod, drill rod upper end is connected spiral groove amplitude rod lower end and is connected with laser channel, drill rod lower end is connected drill cylinder, the lateral wall of drill cylinder is equipped with multiple optical fiber holes extending to drill cylinder bottom surface, multiple optical fibers are equipped in drill rod, each optical fiber lower end is inserted into optical fiber hole and extends to drill cylinder bottom surface.The utility model has the beneficial effects that laser is dispersed and radiated to the area of drill cylinder and rock surface contact by optical fiber, so that laser thermal effect is more remarkable, and coring is carried out using the composite mode of laser thermal effect and ultrasonic vibration effect, so that the problem of secondary effect reducing laser rock breaking efficiency is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to drilling equipment technical field especially relates to a decentralized laser assisted ultrasonic coaxial coring device. BACKGROUND

[0002] Laser rock breaking is a kind of non-contact physical and chemical method for reducing the strength of hard rock, which uses high-energy laser beam to act on the rock surface, so that the local rock occurs thermal crushing, melting and gasification phenomenon. In the process of laser breaking rock, secondary effect will be produced, with the increase of drilling depth, a large amount of molten material will be produced due to the absorption of laser heat by rock, due to the limitation of laser energy, the molten material cannot be completely gasified, but will be recondensed or accumulated on the wall and bottom of the hole to form residue, which continuously absorbs laser energy and hinders the further drilling of laser; In addition, the ionized plasma formed by the heated rock material by laser will absorb laser energy, which hinders the further contact of laser and rock surface material, so the hole drilled by laser is generally inverted cone-shaped with the upper part wide and the lower part narrow. The secondary effect will cause the loss of laser energy and reduce the efficiency of laser rock breaking, so inhibiting the generation of secondary effect in the process of laser rock breaking can reduce the specific energy of rock breaking and improve the efficiency of rock breaking. SUMMARY

[0003] Therefore, in order to solve the above problems existing in laser rock breaking, the embodiments of the utility model provide a kind of decentralized laser assisted ultrasonic coaxial coring device.

[0004] The embodiments of the utility model provide a kind of decentralized laser assisted ultrasonic coaxial coring device, comprising:

[0005] Shell;

[0006] Laser irradiation module is set to the upper part in the shell, and the laser irradiation module includes optical isolator and lens arranged below the optical isolator;

[0007] And ultrasonic drilling module is set to the lower part in the shell, and the ultrasonic drilling module includes ultrasonic transducer, spiral groove amplitude rod and coring drill bit, wherein the ultrasonic transducer is arranged below the lens, the upper end of the spiral groove amplitude rod is connected with the ultrasonic transducer, and the lower end is connected with the drill bit, the spiral groove amplitude rod and the ultrasonic transducer are internally provided with laser channel coaxially arranged with the lens, the coring drill bit includes drill cylinder and hollow drill rod, the upper end of the drill rod is connected with the lower end of the spiral groove amplitude rod and connected with the laser channel, the lower end of the drill rod is connected with the drill cylinder, the sidewall of the drill cylinder is provided with a plurality of optical fiber holes extending to the bottom surface of the drill cylinder, a plurality of optical fibers are arranged in the drill rod, and the lower end of each optical fiber is inserted into the optical fiber hole and extends to the bottom surface of the drill cylinder.

[0008] Further, the bottom surface of the drill cylinder is provided with a plurality of spaced apart blades, and each of the lower ends of the optical fibers extends between two adjacent blades.

[0009] Further, the optical fiber holes are arranged axially along the drill cylinder and are uniformly spaced apart on the side surface of the drill cylinder.

[0010] Further, the outer wall of the drill cylinder is provided with helical teeth.

[0011] Further, the ultrasonic drilling module further comprises a hollow screw rod and a flange sleeve, the upper end of the screw rod is connected to the ultrasonic transducer and penetrates the ultrasonic transducer, the upper end of the screw rod is rotatably connected to the shell through a first bearing, the upper end of the screw rod extends below the lens, the flange sleeve is fixedly arranged in the shell and located between the ultrasonic transducer and the helical groove horn, the lower end of the screw rod penetrates the flange sleeve and extends to the inside of the upper end of the helical groove horn, the screw rod is threadedly connected with the flange sleeve and the helical groove horn, the inside of the helical groove horn is hollow, and the screw rod and the inner hole of the helical groove horn are coaxially arranged to form the laser channel.

[0012] Further, the upper end of the drill rod is provided with a mounting sleeve, the inside of the mounting sleeve is provided with a hollow cylindrical rotor, and the lower end of the helical groove horn is inserted into the mounting sleeve and in contact with the upper part of the rotor.

[0013] Further, the ultrasonic drilling module further comprises a cylindrical impact head, the impact head is rotatably sleeved on the outer wall of the mounting sleeve, the upper end of the impact head abuts against the lower end of the helical groove horn, and the lower end of the impact head is connected to the shell through a first elastic member.

[0014] Further, a support sleeve is arranged below the impact head, the lower end of the support sleeve is rotatably connected to the shell through a second bearing, the upper end of the first elastic member is connected to the impact head, and the lower end of the first elastic member is connected to the support sleeve, the drill rod penetrates the second bearing and the support sleeve, the support sleeve is provided with a second elastic member, and the upper end of the second elastic member is connected to the lower part of the mounting sleeve.

[0015] Further, the outer wall of the mounting sleeve is provided with a limiting strip, the inner wall of the impact head is provided with a limiting groove, and the limiting strip is clamped into the limiting groove.

[0016] Further, the helical groove horn is conical in shape with a gradually decreasing diameter from top to bottom, and the outer wall of the helical groove horn is provided with a plurality of helical grooves.

[0017] The embodiment of the utility model provides the beneficial effect brought by technical scheme is: a kind of dispersed laser auxiliary ultrasonic coaxial coring device of the utility model, laser irradiation module and ultrasonic drilling module are coaxially arranged, laser output by light isolator of laser irradiation module is emitted along the laser channel inside ultrasonic drilling module by lens, then is shot into the drill rod of coring drill bit, and is emitted to the bottom surface of drill cylinder by optical fiber so as to be irradiated on rock surface;While ultrasonic drilling module generates longitudinal simple harmonic vibration by ultrasonic transducer and drives helical groove amplitude bar movement, and helical groove amplitude bar converts longitudinal simple harmonic vibration into longitudinal simple harmonic vibration and circumferential torsional motion under the action of helical groove on its surface, so as to drive coring drill bit longitudinal vibration while torsion, so that coring drill bit drills into rock surface, laser is dispersed and radiated to the area of drill cylinder and rock surface contact by optical fiber, so that laser thermal effect is more remarkable, utilize the composite mode of laser thermal effect and ultrasonic vibration effect to take core, blade has realized rock breaking when rock surface melt has not been formed, solve the problem of secondary effect reducing laser broken rock efficiency, improve the coring efficiency of hard rock drilling. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of a kind of dispersed laser auxiliary ultrasonic coaxial coring device of the utility model;

[0019] Figure 2 It is an exploded view of a kind of dispersed laser auxiliary ultrasonic coaxial coring device of the utility model;

[0020] Figure 3 It is a sectional view of a kind of dispersed laser auxiliary ultrasonic coaxial coring device of the utility model;

[0021] Figure 4 It is Figure 3 Local enlarged view of A in it;

[0022] Figure 5 It is a perspective view of coring drill bit;

[0023] Figure 6 It is the internal structure diagram of coring drill bit;

[0024] Figure 7 It is the plan view of coring drill bit.

[0025] In the figure: 1, the shell; 2, spiral groove variable amplitude rod; 3, core drill; 4, upper shell; 5, middle shell; 6, lower shell; 7, optical isolator; 8, lens; 9, first bearing; 10, piezoelectric ceramic stack; 11, gland; 12, nut; 13, flange sleeve; 14, spiral groove; 15, rotor; 16, impact head; 17, first elastic member; 18, second elastic member; 19, support sleeve; 20, second bearing; 21, lower end cover; 22, mounting sleeve; 23, drill rod; 24, drill cylinder; 25, screw; 26, annular cutting groove; 27, optical fiber hole; 28, optical fiber; 29, blade; 30, helical tooth. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will be further described with the utility model embodiments combined with the drawings. The following introduces one of the more optimal ones of multiple possible embodiments of the utility model, and is intended to provide a basic understanding of the utility model, but is not intended to identify key or decisive elements of the utility model or limit the scope of protection.

[0027] In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of example embodiments can have different values.

[0028] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0029] It should be noted that like reference numerals and letters refer to like items in the several views of the drawings, and as such, no further discussions on the same will be "repeated" in the several views of the drawings. It is to be understood that the drawings are shown by way of illustration and not as the construction of the application in which the dimensions of the various parts are not necessarily to the scale.

[0030] In the description of the utility model, it needs to be explained that the circuit and electronic components and modules involved in the utility model are all prior art, which can be realized by those skilled in the art without further description, and the content protected by the utility model does not involve the improvement of internal structure and method.

[0031] It needs to be further explained that unless otherwise specified and limited, the terms "mounting" and "connection" should be interpreted broadly, for example, it can be fixed connection, or detachable connection, or integral connection, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] Reference is made to Figures 1-4 The embodiment of the utility model provides a kind of dispersed laser-assisted ultrasonic coaxial coring device, including shell 1, laser irradiation module and ultrasonic drilling module.

[0033] Wherein, the shell 1 is used to encapsulate and protect the laser irradiation module and ultrasonic drilling module.The shape of the shell 1 can be flexibly set according to the actual application scene, and is generally set as cylindrical shape.As described in the embodiment, the shell 1 includes sequentially connected upper shell 4, middle shell 5 and lower shell 6.The upper shell 4, the middle shell 5 and the lower shell 6 are cylindrical shape with diameters decreasing sequentially.

[0034] The laser irradiation module is arranged inside the shell 1, and is specifically arranged inside the upper shell 4.The laser irradiation module mainly includes coaxially arranged optical isolator 7 and lens 8, the optical isolator 7 is arranged in the upper shell 4, and the lens 8 is arranged at the lower end of the upper shell 4, below the optical isolator 7.The optical isolator 7 can be connected with external laser, and the laser emitted by the laser is emitted through the optical isolator 7, and the emitted laser passes through the lens 8 to form a laser beam with a predetermined spot diameter.

[0035] The ultrasonic drilling module is arranged in the lower part of the shell 1, and is specifically arranged inside the middle shell 5 and the lower shell 6.The ultrasonic drilling module includes ultrasonic transducer, helical groove amplitude rod 2 and coring drill bit 3, wherein the ultrasonic transducer is arranged below the lens 8, the upper end of the helical groove amplitude rod 2 is connected with the ultrasonic transducer, and the lower end is connected with the drill bit, the helical groove amplitude rod 2 and the ultrasonic transducer are internally provided with laser channel coaxially arranged with the lens 8, the coring drill bit 3 includes drill cylinder 24 and hollow drill rod 23, the upper end of the drill rod 23 is connected with the lower end of the helical groove amplitude rod 2 and connected with the laser channel, the lower end of the drill rod 23 is connected with the drill cylinder 24, the sidewall of the drill cylinder 24 is provided with a plurality of optical fiber holes 27 extending to the bottom surface of the drill cylinder 24, and the drill rod 23 is provided with a plurality of optical fibers 28, and the lower end of each optical fiber is inserted into the optical fiber hole 27 and extends to the bottom surface of the drill cylinder 24.

[0036] Specifically, the ultrasonic drilling module further comprises a hollow screw rod 25 and a flange sleeve 13, the upper end of the screw rod 25 is connected to and penetrates the ultrasonic transducer, the upper end of the screw rod 25 is rotatably connected to the shell through a first bearing 9, the upper end of the screw rod 25 extends below the lens 8, the flange sleeve 13 is fixedly arranged in the shell and located between the ultrasonic transducer and the helical groove horn 2, the lower end of the screw rod 25 penetrates the flange sleeve 13 and extends to the inside of the upper end of the helical groove horn 2, the screw rod 25 is threadedly connected with the flange sleeve 13 and the helical groove horn 2, the helical groove horn 2 is hollow inside, and the screw rod 25 and the inner hole of the helical groove horn 2 are coaxially arranged to form the laser channel.

[0037] The ultrasonic transducer specifically comprises a piezoelectric ceramic stack 10, a gland 11 and a nut 12, the piezoelectric ceramic stack 10 is supported on the upper end of the flange sleeve 13, the gland 11 is arranged on the upper part of the piezoelectric ceramic stack 10, the upper end of the screw rod 25 penetrates the flange sleeve 13, the piezoelectric ceramic stack 10 and the gland 11 and is tightly connected with the nut 12.

[0038] In some embodiments, the edge of the upper part of the flange sleeve 13 is clamped and fixed by the upper end of the middle shell 5 and the upper end of the lower shell 6. The upper edge of the flange sleeve 13 is provided with an annular cut groove 26, which is arranged around the helical groove horn 2, so that the thickness of the connection between the upper part of the flange sleeve 13 and the helical groove horn 2 is reduced. In this way, the amplitude of the helical groove horn 2 can be improved, and the drilling efficiency can be improved.

[0039] The helical groove horn 2 is conical with a diameter gradually decreasing from top to bottom, and the outer wall of the helical groove horn 2 is provided with a plurality of helical grooves 14. The ultrasonic transducer can generate high-frequency longitudinal simple harmonic vibration when it works, and when the simple harmonic vibration is transmitted to the helical groove horn 2, the helical groove horn 2 performs elliptical motion due to the helical grooves 14 on the surface, realizing longitudinal amplitude and torsional amplitude, thereby driving the core drill bit 3 to vibrate longitudinally and torsionally.

[0040] The upper end of the drill rod 23 is provided with a mounting sleeve 22, and the mounting sleeve 22 is coaxially arranged with the screw rod 25. The mounting sleeve 22 is internally provided with a hollow cylindrical rotor 15, the diameter of the rotor 15 is slightly smaller than the inner diameter of the mounting sleeve 22, and the lower end of the helical groove horn 2 is inserted into the mounting sleeve 22 and in contact with the upper part of the rotor 15. In this way, the lower end of the helical groove horn 2 can drive the rotor 15 to rotate, and the rotation of the rotor 15 drives the mounting sleeve 22 to rotate, thereby driving the core drill bit 3 to twist.

[0041] To ensure stable torsion of the core drill bit 3, the ultrasonic drilling module further includes a cylindrical impact head 16. The impact head 16 is rotatably fitted onto the outer wall of the mounting sleeve 22. The upper end of the impact head 16 abuts against the lower end of the spiral groove amplitude transformer 2, and the lower end is connected to the outer shell via a first elastic element 17. In this way, the lower end of the spiral groove amplitude transformer 2 can simultaneously apply rotational force in the same direction to both the rotor 15 and the impact head 16, giving the core drill bit 3 a greater torsional force.

[0042] Furthermore, in some embodiments, a support sleeve 19 is provided below the impact head 16, and the lower end of the support sleeve 19 is rotatably connected to the outer shell through a second bearing 20. A lower end cover 21 is fixedly installed on the lower end of the lower outer shell 6, and the second bearing 20 is fixedly installed on the lower end cover 21.

[0043] The first elastic element 17 is connected to the impact head 16 at its upper end and to the support sleeve 19 at its lower end. The drill rod 23 passes through the second bearing 20 and the support sleeve 19. A second elastic element 18 is provided inside the support sleeve 19, and the upper end of the second elastic element 18 is connected to the lower part of the mounting sleeve 22. The first elastic element 17 and the second elastic element 18 are preferably springs.

[0044] In some embodiments, the outer wall of the mounting sleeve 22 is provided with a limiting strip, and the inner wall of the impact head 16 is provided with a limiting groove, with the limiting strip engaging in the limiting groove. Both the limiting strip and the limiting groove extend axially from the mounting sleeve 22, and the cooperation between the limiting strip and the limiting groove allows the mounting sleeve 22 and the impact head 16 to rotate synchronously.

[0045] In addition, such as Figures 5-7 As shown, to improve the drilling performance of the core drill bit 3, the bottom surface of the drill barrel 24 is provided with a plurality of spaced-apart blades 29, and the lower end of each optical fiber 28 extends between two adjacent blades 29. When the blades 29 contact the rock, the laser emitted by the optical fiber 28 acts precisely on the rock area between each blade 29, making more accurate use of the laser thermal effect and improving the drilling efficiency for hard rocks. Preferably, the outer wall of the drill barrel 24 is provided with helical teeth 30, which protrude from the outer wall of the drill barrel 24.

[0046] Generally, the blades 29 are evenly arranged on the bottom surface of the drill barrel 24. In order to cooperate with the drilling of the rock by each blade 29, the optical fiber holes 27 are arranged along the axial direction of the drill barrel 24 and are evenly spaced on the side of the drill barrel 24. In this way, the laser emitted from each optical fiber hole 27 evenly irradiates the rock in the drilling area at the bottom of the drill barrel 24.

[0047] Considering that the front end of the drill barrel 24 is in direct contact with the rock, to prevent rock cuttings generated during rock breaking from entering the side wall of the drill barrel 24 and damaging the optical fiber 28, a cap can be provided at the front end of the optical fiber hole 27. The cap is made of a light-transmitting material. The cap minimizes light intensity attenuation while ensuring that the energy of the laser after passing through the cap is sufficient for rock modification.

[0048] A novel distributed laser-assisted ultrasonic coaxial coring device enables efficient drilling and coring of hard rocks: a laser is input to the optical isolator 7 via a laser, and the laser beam passes through the lens 8 to form a laser beam with a predetermined spot diameter. The spot diameter of the laser beam is generally slightly smaller than the minimum diameter of the laser channel. The laser beam is input through the laser channel into each optical fiber 28 within the drill rod 23 of the coring drill bit 3, and is emitted along each optical fiber 28 to irradiate the drilling point on the rock surface.

[0049] Simultaneously, ultrasonic waves are input to the ultrasonic transducer, which generates longitudinal simple harmonic vibration and transmits this vibration to the spiral groove amplitude transformer 2. The ultrasonic transducer drives the spiral groove amplitude transformer 2 to undergo longitudinal simple harmonic vibration. The vibration force of the simple harmonic vibration is divided into the internal solid cone part and the surface spiral groove 14 part. The vibration force on the solid cone part is still longitudinal, but the vibration force on the spiral groove 14 part generates a tangential force under the spiral groove 14. Thus, the spiral groove amplitude transformer 2 generates a circumferential torsional force while vibrating longitudinally, thereby driving the core drill bit 3 to vibrate longitudinally and twist simultaneously, allowing the core drill bit 3 to drill into the drilling point irradiated by the laser beam. The laser heats the drilling point, reducing the rock strength, thereby increasing the drilling speed of the core drill bit 3, allowing the drill barrel 24 to easily drill into hard rock and complete the core extraction.

[0050] In this document, the directional terms such as front, back, top, and bottom are defined based on the position of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that these are relative concepts and can vary depending on different methods of use and placement; the use of these directional terms should not limit the scope of protection claimed in this application.

[0051] Where there is no conflict, the embodiments and features described above can be combined with each other. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A distributed laser assisted ultrasonic borehole coring device, comprising: The application relates to a laser-ultrasonic drilling device, which comprises the following parts: a housing; a laser irradiation module arranged in the upper part of the housing, the laser irradiation module comprising an optical isolator and a lens arranged below the optical isolator; and an ultrasonic drilling module arranged in the lower part of the housing, the ultrasonic drilling module comprising an ultrasonic transducer, a helical slot horn and a coring drill bit, wherein the ultrasonic transducer is arranged below the lens, the helical slot horn is connected to the ultrasonic transducer at the upper end and connected to the drill bit at the lower end, the helical slot horn and the ultrasonic transducer are internally provided with a laser channel coaxially arranged with the lens, the coring drill bit comprises a drill cylinder and a hollow drill rod, the upper end of the drill rod is connected to the lower end of the helical slot horn and connected to the laser channel, the lower end of the drill rod is connected to the drill cylinder, the sidewall of the drill cylinder is provided with a plurality of optical fiber holes extending to the bottom surface of the drill cylinder, and the drill rod is internally provided with a plurality of optical fibers, the lower end of each optical fiber is inserted into the optical fiber hole and extends to the bottom surface of the drill cylinder.

2. A distributed laser assisted ultrasonic borehole coring device as claimed in claim 1, wherein: The bottom surface of the drill cylinder is provided with a plurality of blades arranged at intervals, and the lower end of each optical fiber extends to the space between two adjacent blades.

3. A distributed laser assisted ultrasonic borehole coring device as defined in claim 1, wherein: The optical fiber holes are arranged axially along the drill cylinder and uniformly arranged on the sidewall of the drill cylinder.

4. A distributed laser assisted ultrasonic borehole coring device as defined in claim 1, wherein: The outer wall of the drill cylinder is provided with helical teeth.

5. A distributed laser assisted ultrasonic borehole coring device as defined in claim 1, wherein: The ultrasonic drilling module further comprises a hollow screw rod and a flange sleeve, the upper end of the screw rod is connected to the ultrasonic transducer and penetrates the ultrasonic transducer, the upper end of the screw rod is rotatably connected to the housing through a first bearing, the upper end of the screw rod extends below the lens, the flange sleeve is fixedly arranged in the housing and located between the ultrasonic transducer and the helical slot horn, the lower end of the screw rod penetrates the flange sleeve and extends to the inside of the upper end of the helical slot horn, the screw rod is threadedly connected with the flange sleeve and the helical slot horn, the inside of the helical slot horn is hollow, and the screw rod is coaxially arranged with the inner hole of the helical slot horn to form the laser channel.

6. A distributed laser assisted ultrasonic borehole coring device as defined in claim 1, wherein: The upper end of the drill rod is provided with a mounting sleeve, the inside of the mounting sleeve is provided with a rotor in the form of a hollow cylinder, and the lower end of the helical slot horn is inserted into the mounting sleeve and in contact with the upper part of the rotor.

7. A distributed laser assisted ultrasonic borehole coring device as defined in claim 6, wherein: The ultrasonic drilling module further comprises a cylindrical impact head, the impact head is rotatably sleeved on the outer wall of the mounting sleeve, the upper end of the impact head is in abutment with the lower end of the helical slot horn, and the lower end of the impact head is connected to the housing through a first elastic member.

8. A distributed laser assisted ultrasonic borehole coring device as defined in claim 7, wherein: The lower part of the impact head is provided with a support sleeve, the lower end of the support sleeve is rotatably connected to the housing through a second bearing, the upper end of the first elastic member is connected to the impact head, and the lower end of the first elastic member is connected to the support sleeve, the drill rod penetrates the second bearing and the support sleeve, the support sleeve is internally provided with a second elastic member, and the upper end of the second elastic member is connected to the lower part of the mounting sleeve.

9. A distributed laser assisted ultrasonic borehole coring device as defined in claim 7, wherein: The outer wall of the mounting sleeve is provided with a limiting strip, the inner wall of the impact head is provided with a limiting groove, and the limiting strip is clamped into the limiting groove.

10. A distributed laser assisted ultrasonic borehole coring device as defined in claim 1, wherein: The helical slot horn is conical and gradually reduced in diameter from top to bottom, and the outer wall of the helical slot horn is provided with a plurality of helical grooves.

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