Rotary laser jet radial drilling apparatus and method

Abstract

The application discloses a rotary laser jet radial drilling device. The jet drilling has wide application in geological resource exploitation and engineering construction, but the rock breaking efficiency of the traditional jet drilling is limited by the surface porosity of the rock mass, so that the jet drilling has limited application in the drilling of dense rock mass. The laser auxiliary rock breaking device is arranged, the surface porosity of the rock mass is improved, and the strength of the rock mass is reduced; the rotary water jet drill bit is arranged, and the damage of the jet to the rock mass is strengthened; the drilling efficiency of the jet drilling is effectively improved by the combination of the two; meanwhile, the three-section deflection diverter of the drilling device can realize radial drilling and reduce the hindering effect on the propagation of the laser and the jet medium in the radial drilling process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rock drilling, in particular to a rotating laser jet radial drilling device and method thereof. BACKGROUND

[0002] Jet drilling has a wide range of applications in geological resource exploitation and engineering construction, and has the characteristics of low drilling heat generation, small drilling debris, high debris removal efficiency, and strong rock breaking capacity. Moreover, jet medium is inexpensive, easy to obtain, and reusable, having economic and environmental advantages. Due to the fluid characteristics of the jet medium, jet drilling is often used for radial drilling. However, engineering practice and experimental simulation results show that the rock breaking efficiency of traditional jet drilling is limited by the surface porosity of the rock mass, resulting in limited application of jet drilling in dense rock drilling. Related experiments show that laser irradiation of rock can effectively increase the porosity of rock and reduce the strength of rock. On the other hand, rotating jet has additional radial and tangential velocities compared to conventional jet, which can cut the surface of the rock mass and enhance the rock breaking efficiency. Therefore, the combination of the two can improve the drilling efficiency in dense rock. However, there are technical problems in realizing the fusion drilling of laser and rotating jet to improve the rock breaking efficiency, such as how to realize the laser-assisted rock breaking device, how to realize radial drilling and eliminate the hindering effect of the traditional steering device on the transmission of laser and jet medium. SUMMARY

[0003] To improve the drilling efficiency of existing jet drilling, realize radial drilling of the drilling tool, and solve the problems of the prior art, the present application provides a rotating laser jet radial drilling device. The combination of laser and rotating jet is used to improve the drilling efficiency. Through a three-section steering device structure, the steering of the drilling tool is realized, and the hindering effect of laser and jet medium on the propagation after the steering of the drilling tool is reduced. The technical solution is as follows:

[0004] A rotary laser jet radial drilling device, comprising a rotary laser jet drill (1), a flexible drill pipe (2), a generator (3), a jet medium storage container (4), a pressurizing pump (5), a reel (6), a drill stand (7), a feeding device (8), a ground control device (9); characterized in that: the flexible drill pipe (2) is provided with a cable and a fluid channel; the starting end of the flexible drill pipe (2) is connected with the reel (6) and wound on the reel (6), and the end of the flexible drill pipe (2) is connected with the rotary laser jet drill (1); the reel (6) is provided with a rotary cable joint and a rotary fluid joint, the rotary cable joint is connected with the cable in the flexible drill pipe (2), and the rotary fluid joint is connected with the fluid channel in the flexible drill pipe (2); the generator (3) is connected with the rotary cable joint of the reel (6) to provide electric energy; the jet medium storage container (4) and the pressurizing pump (5) are connected with the rotary fluid joint of the reel (6) in series to provide high-pressure jet medium; the drill stand (7) is provided with the feeding device (8), the flexible drill pipe (2) passes through the feeding device (8), and the feeding device (8) provides drilling power for the flexible drill pipe (2) and the rotary laser jet drill (1); the ground control device (9) is connected with the rotary laser jet drill (1) through wireless communication, and the ground control device (9) converts ground commands into wireless signals and sends them to the rotary laser jet drill (1).

[0005] The rotary laser jet drill (1) comprises a drilling unit (1-1), a diverter (1-2) and a remote control unit (1-3); characterized in that: the diverter (1-2) is a cylindrical structure; the drilling unit (1-1) and the remote control unit (1-3) are arranged in the diverter (1-2); the end of the diverter (1-2) is provided with a claw-shaped limit; the starting end of the drilling unit (1-1) is connected with the starting end of the diverter (1-2) through a rotary pair, the rotary axis of the diverter (1-2) is rotary axis a (1-2-4); and a driving device (1-2-7) is arranged at the connection between the drilling unit (1-1) and the diverter (1-2) to drive the rotary pair to rotate; the remote control unit (1-3) receives ground control signals, is connected with the cable in the flexible drill pipe (2), and provides electric energy for the drilling unit (1-1) and the diverter (1-2).

[0006] The drilling unit (1-1) comprises a drill pipe joint (1-1-1), a hose (1-1-2), a drill bit joint (1-1-3), a rotary jet drill bit (1-1-4), a laser (1-1-5), an optical fiber (1-1-6), and a laser head (1-1-7); characterized in that the drill pipe joint (1-1-1) connects the fluid channel in the hose (1-1-2) and the flexible drill pipe (2); the drill bit joint (1-1-3) connects the hose (1-1-2) and the rotary jet drill bit (1-1-4); the laser (1-1-5) is fixed at the starting end of the drilling unit (1-1), the laser head (1-1-7) is fixed at the end of the drilling unit (1-1), the laser (1-1-5) and the laser head (1-1-7) are connected through the optical fiber (1-1-6); and the laser head (1-1-7) and the rotary jet drill bit (1-1-4) are arranged in the jaw-shaped limit at the end of the deflector (1-2).

[0007] Preferably, the number of the laser (1-1-5) and the laser head (1-1-7) is three, which are respectively arranged around the starting end and the end of the drilling unit (1-1).

[0008] Preferably, the rotary jet drill bit (1-1-4) is characterized in that the rotary jet drill bit (1-1-4) is sequentially provided with an impeller (1-1-4a), a contraction cavity (1-1-4b), and a nozzle (1-1-4c) from the jet inlet.

[0009] The deflector (1-2) is provided as a three-stage deflection pipe, sequentially comprising a first-stage deflection pipe (1-2-1), a second-stage deflection pipe (1-2-2), and a third-stage deflection pipe (1-2-3); the first-stage deflection pipe (1-2-1), the second-stage deflection pipe (1-2-2), and the third-stage deflection pipe (1-2-3) are connected through rotary pairs between adjacent two deflection pipes, and the relative rotation between the deflection pipes is realized through the driving device (1-2-7), and the driving device (1-2-7) is provided with electric energy by the remote control unit (1-3). The deflection radius of the deflector (1-2) is smaller than the drilling hole radius.

[0010] The connecting surfaces between the first-stage deflection pipe (1-2-1), the second-stage deflection pipe (1-2-2), and the third-stage deflection pipe (1-2-3) are provided as inclined surfaces, so that the rotation axis b (1-2-5) of the second-stage deflection pipe (1-2-2) and the rotation axis c (1-2-6) of the third-stage deflection pipe (1-2-3) are offset; the inclined angles of the two connecting surfaces are the same in size and opposite in direction.

[0011] The profile of the connecting surface between the first-stage deflection pipe (1-2-1), the second-stage deflection pipe (1-2-2), and the third-stage deflection pipe (1-2-3) is provided as a circle, so as to ensure that the pipe body remains sealed during rotation.

[0012] The pipe surface profile at the connection between the first steering pipe (1-2-1), the second steering pipe (1-2-2), and the third steering pipe (1-2-3) is an ellipse, and the shape of the ellipse satisfies the following mathematical relationship: the ratio of the short axis to the long axis of the ellipse is equal to the cosine value of the oblique angle of the connection surface.

[0013] The connection surface between the first steering pipe (1-2-1), the second steering pipe (1-2-2), and the third steering pipe (1-2-3) is parallel to the long axis of the ellipse.

[0014] Preferably, the first steering pipe (1-2-1) is a variable cross-section pipe, and the front end pipe surface profile is a circle, and the rear end pipe surface profile is an ellipse.

[0015] Preferably, the second steering pipe (1-2-2) is a constant cross-section pipe, and the pipe surface profile is an ellipse.

[0016] Preferably, the third steering pipe (1-2-3) is a variable cross-section pipe, and the front end pipe surface profile is an ellipse, and the rear end pipe surface profile is a circle.

[0017] Preferably, the oblique angle is in the range of 20° to 70°.

[0018] A rotary laser jet radial drilling method based on a rotary laser jet radial drilling device, which mainly includes the following steps:

[0019] Step 1: The generator (3) provides electric energy to the remote control unit (1-3) through the flexible drill pipe (2); the remote control unit (1-3) receives the wireless signal transmitted by the ground control device (9); the driving device (1-2-7) is started to rotate the steering pipes (1-2-1, 1-2-2, 1-2-3), causing the first steering pipe (1-2-1) to perform horizontal rotation, the second steering pipe (1-2-2) and the third steering pipe (1-2-3) to perform deflection, and driving the internal drilling unit (1-1) to steer;

[0020] Step 2: After steering is completed, the remote control unit (1-3) starts the laser (1-1-5) to generate laser; the laser is transmitted to the laser head (1-1-7) through the optical fiber (1-1-6); the laser is emitted from the laser head (1-1-7) to act on the rock surface, causing thermal stress in the rock body, leading to the development of rock fissures, and increasing the porosity of the rock surface;

[0021] Step 3, after the laser irradiation is completed, the jet medium flows out from the jet medium storage container (4) and the pressurizing pump (5) to form high-pressure fluid; the high-pressure fluid enters the rotary laser jet drill (1) through the flexible drill pipe (2), enters the rotary jet drill bit (1-1-4) through the hose (1-1-2) and the drill bit joint (1-1-3); then, the jet medium flows through the impeller (1-1-4a) to obtain radial velocity and tangential velocity, forming a rotating jet; the jet obtains high pressure through the contraction cavity (1-1-4b); then, the jet is emitted from the nozzle (1-1-4c) and destroys the rock mass through impact, hydraulic fracturing and cutting action; the feed device (8) provides a downward thrust to continuously drill downward.

[0022] The present application has the following beneficial effects:

[0023] 1. The present application uses laser irradiation on rock mass to cause thermal cracking of the rock mass and improve the porosity of the rock mass; then, the rock mass is destroyed by the rotary jet, and the debris generated by the rock breaking is removed from the working range by the jet medium, effectively improving the drilling efficiency.

[0024] 2. The present application uses a three-stage steering tube to form three pairs of rotating pairs, and the tube body remains sealed during deflection. By controlling the three pairs of rotating pairs, effective and flexible steering can be achieved. Two angles are formed during rotation, which play a buffering role in the transmission of the jet and the laser. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a system diagram of the present application;

[0026] Figure 2 is a system diagram of the rotary laser jet drill;

[0027] Figure 3 is a schematic diagram of the steering of the rotary laser jet drill;

[0028] Figure 4 is a structural cross-sectional view of the steering device;

[0029] Figure 5 is a schematic diagram of the structure of the steering device;

[0030] Figure 6 is Figure 5 a cross-sectional view of the 1-1 plane and the 8-8 plane;

[0031] Figure 7 is Figure 5 a cross-sectional view of the 2-2 plane, the 5-5 plane and the 7-7 plane;

[0032] Figure 8 is Figure 5 a cross-sectional view of the 3-3 plane and the 6-6 plane;

[0033] Figure 9is a structural sectional view of the drilling unit;

[0034] Figure 10 is a structural schematic view of the rotary jet drill bit;

[0035] Figure 11 is a right view of the impeller of the rotary jet drill.

[0036] Figures 1-11 In the figure: 1 is a rotary laser jet drill; 1-1 is a drilling unit; 1-1-1 is a drill bit joint; 1-1-2 is a hose; 1-1-3 is a drill bit joint; 1-1-4 is a rotary jet drill bit; 1-1-4a is an impeller; 1-1-4b is a contraction cavity; 1-1-4c is a nozzle; 1-1-5 is a laser; 1-1-6 is an optical fiber; 1-1-7 is a laser head; 1-2 is a deflector; 1-2-1 is a first-stage deflection pipe; 1-2-2 is a second-stage deflection pipe; 1-2-3 is a third-stage deflection pipe; 1-2-4 is a rotation axis a; 1-2-5 is a rotation axis b; 1-2-6 is a rotation axis c; 1-2-7 is a driving device; 1-3 is a remote control unit; 2 is a flexible drill pipe; 3 is a generator; 4 is a jet medium storage container; 5 is a pressurizing pump; 6 is a reel; 7 is a drilling rig; 8 is a feeding device; 9 is a ground control device; a is an ellipse minor axis; b is an ellipse major axis; θ is an inclination angle. DETAILED DESCRIPTION

[0037] The technical solutions of the present application are further specifically described below with reference to the drawings.

[0038] Referring to Figure 1 A rotary laser jet radial drilling device mainly comprises a rotary laser jet drill (1), a flexible drill pipe (2), a generator (3), a jet medium storage container (4), a pressurizing pump (5), a reel (6), a drilling rig (7), a feeding device (8), and a ground control device (9). The flexible drill pipe (2) has a two-layer structure, and a cable and a fixed filler are arranged in the interlayer. The flexible drill pipe (2) is connected with the rotary laser jet drill (1) through a thread. The starting end of the flexible drill pipe (2) is connected with the reel (6) and is wound on the reel (6). The reel (6) is provided with a rotary cable joint and a rotary fluid joint. The rotary cable joint is connected with the cable in the flexible drill pipe (2), and the rotary fluid joint is connected with a fluid channel in the flexible drill pipe (2). The jet medium storage container (4) and the pressurizing pump (5) are connected with each other through the rotary fluid joint of the reel (6) after being connected in series, so as to provide high-pressure jet medium. The generator (3) is connected with the rotary cable joint of the reel (6), so as to provide electric energy. The feeding device (8) is installed on the drilling rig (7) and provides drilling power for the flexible drill pipe (2) and the rotary laser jet drill (1). The ground control device (9) is connected with the rotary laser jet drill (1) through wireless communication. The ground control device (9) converts a ground command into a wireless signal and sends the wireless signal to the rotary laser jet drill (1).

[0039] Referring to Figure 2 , the rotary laser jet drill (1) comprises a drilling unit (1-1), a steering device (1-2), and a remote control unit (1-3); the remote control unit (1-3) receives ground control signals, and the remote control unit (1-3) is connected with a cable in a flexible drill pipe (2) and provides electric energy for the drilling unit (1-1) and the steering device (1-2).

[0040] Referring to Figures 3-9 , the steering device (1-2) is provided as a three-stage steering pipe, which comprises a first-stage steering pipe (1-2-1), a second-stage steering pipe (1-2-2), and a third-stage steering pipe (1-2-3) in sequence; the first-stage steering pipe (1-2-1), the second-stage steering pipe (1-2-2), and the third-stage steering pipe (1-2-3) are connected through rotating pairs between adjacent two steering pipes, and relative rotation between the steering pipes is realized through a driving device (1-2-7), and the driving device (1-2-7) is provided with electric energy from the remote control unit (1-3); connecting surfaces between adjacent two steering pipes of the first-stage steering pipe (1-2-1), the second-stage steering pipe (1-2-2), and the third-stage steering pipe (1-2-3) are provided as inclined surfaces, so that a rotating axis b (1-2-5) of the second-stage steering pipe (1-2-2) and a rotating axis c (1-2-6) of the third-stage steering pipe (1-2-3) are offset; the inclined angles of two connecting surfaces are the same in size and opposite in direction; the inclined angle is in a range of 20° to 70°; the profiles of the connecting surfaces between adjacent two steering pipes of the first-stage steering pipe (1-2-1), the second-stage steering pipe (1-2-2), and the third-stage steering pipe (1-2-3) are provided as circles, so as to ensure that the pipe body is kept sealed during rotation; the pipe surface profile of the connecting position between adjacent two steering pipes of the first-stage steering pipe (1-2-1), the second-stage steering pipe (1-2-2), and the third-stage steering pipe (1-2-3) is an ellipse, and the shape of the ellipse satisfies the following mathematical relationship: the ratio of the short axis a of the ellipse to the long axis b is equal to the cosine value of the inclined angle θ of the connecting surface; the connecting surface between adjacent two steering pipes of the first-stage steering pipe (1-2-1), the second-stage steering pipe (1-2-2), and the third-stage steering pipe (1-2-3) is parallel to the long axis b of the ellipse in space.

[0041] Referring to Figures 5-8 , the first-stage steering pipe (1-2-1) is a variable cross-section pipe, the rear end connecting surface is provided as an inclined surface with an inclined angle θ with respect to the radial direction, the front end pipe surface profile (1-1 surface) is as shown in Figure 6 , the rear end pipe surface profile (2-2 surface) is as shown in Figure 7 , and the rear end connecting surface profile (3-3 surface) is as shown in Figure 8 .

[0042] The second-stage steering pipe (1-2-2) is a constant cross-section pipe, and the pipe surface profile (5-5 surface) is as shown in Figure 7As shown, the front and rear ends are provided with inclined surfaces with an inclined angle of θ, and the inclined angles are opposite.

[0043] The third steering pipe (1-2-3) is a variable cross-section pipe, and the front end connecting surface is provided with an inclined surface with an inclined angle of θ, and the front end connecting surface profile (6-6 cross-section) is as shown in Figure 8 As shown, the front end pipe surface profile (7-7 cross-section) is as shown in Figure 7 As shown, the rear end pipe surface profile (8-8 cross-section) is as shown in Figure 6

[0044] Referring to Figures 5-8 , in the figure, θ, a, and b satisfy the relationship: cosθ=a / b; and the connecting surface profiles are circles.

[0045] Referring to Figure 3 , the working principle of the deflector (1-2) is described; by providing a rotating surface with an inclined angle, the rotating axis b (1-2-5) of the second steering pipe (1-2-2) and the rotating axis c (1-2-6) of the third steering pipe (1-2-3) are offset, the steering pipe axis direction is changed during rotation, so that the deflector (1-2) is deflected as a whole, and the internal drilling unit (1-1) is deflected; the rotation of the first steering pipe (1-2-1) plays a horizontal rotation role for the deflector (1-2) as a whole; the rotation of the second steering pipe (1-2-2) and the third steering pipe (1-2-3) plays a deflection role for the deflector (1-2) as a whole; according to kinematic analysis, the maximum deflection angle of the deflector (1-2) is four times the inclined angle.

[0046] The drilling unit (1-1) refers to Figures 10-11 , and includes a drill joint (1-1-1), a hose (1-1-2), a drill joint (1-1-3), a rotary jet drill bit (1-1-4), a laser (1-1-5), an optical fiber (1-1-6), and a laser head (1-1-7); the drill joint (1-1-1) connects the hose (1-1-2) and the flexible drill pipe (2), and the drill joint (1-1-3) connects the hose (1-1-2) and the rotary jet drill bit (1-1-4); the laser (1-1-5) is fixed at the starting end of the drilling unit (1-1), the laser head (1-1-7) is fixed at the end of the drilling unit (1-1), and the laser (1-1-5) and the laser head (1-1-7) are connected through the optical fiber (1-1-6); the laser (1-1-5) and the laser head (1-1-7) are connected through the optical fiber (1-1-6); the rotary jet drill bit (1-1-4) includes an impeller (1-1-4a), a contraction cavity (1-1-4b), and a nozzle (1-1-4c).

[0047] ​The working principle of the drilling unit (1-1) is as follows: the laser (1-1-5) generates laser light, the laser light is transmitted to the laser head (1-1-7) through the optical fiber (1-1-6) and then irradiates the rock surface, so that thermal stress is generated in the rock body, causing fracture damage microcracks and improving the porosity of the rock surface; the jet flow medium of the flexible drill pipe (2) enters the rotary jet drill bit (1-1-4) through the drill bit joint (1-1-1), the hose (1-1-2) and the drill bit joint (1-1-3); after entering the rotary jet drill bit (1-1-4), the flow passes through the impeller (1-1-4a) to obtain radial velocity and tangential velocity, forming a rotating jet flow; the flow passes through the contraction cavity (1-1-4b) to obtain high pressure, and is ejected from the nozzle (1-1-4c) to act on the rock body; the rock breaking effect of the rotating jet flow is as follows: 1. The high-pressure jet flow enters the fracture damage microcracks of the rock body, and the water pressure acts on the inside of the rock body to produce hydraulic fracturing; 2. The impact force of the high-pressure jet flow acts on the surface of the rock body to produce impact damage; 3. The radial velocity and tangential velocity of the rotating jet flow act on the surface of the rock body to produce cutting damage.

[0048] A rotary laser jet radial drilling method, comprising the following steps:

[0049] Step 1, refer to Figure 2 、 3 , the drilling tool is in the initial state of turning; the remote control unit (1-3) receives electric energy through the flexible drill pipe (2) and receives wireless signals emitted by the ground control device (9); the driving device (1-2-7) is started to make the second turning pipe (1-2-2) and the third turning pipe (1-2-3) rotate and drive the internal drilling unit (1-1) to turn. If horizontal turning is needed, the driving device (1-2-7) can be controlled to make the first turning pipe (1-2-1) rotate.

[0050] Step 2, after turning is completed, the remote control unit (1-3) starts the laser (1-1-5) to generate laser light; the laser light is transmitted to the laser head (1-1-7) through the optical fiber (1-1-6); the laser light is emitted from the laser head (1-1-7) to act on the rock surface, so that thermal stress is generated in the rock body, causing the development of rock fissures and increasing the porosity of the rock surface.

[0051] Step 3, after the laser action is completed, the jet medium flows out from the jet medium storage container (4), the pressurized pump (5) to form a high-pressure fluid, the high-pressure fluid enters the drilling unit (1-1) from the flexible drill pipe (2) through the drill pipe joint (1-1-1), enters the rotary jet drill bit (1-1-4) through the hose (1-1-2) and the drill bit joint (1-1-3); after the jet medium enters the rotary jet drill bit (1-1-4), it flows through the impeller (1-1-4a) to obtain radial velocity and tangential velocity, forming a rotating jet; the jet obtains high pressure through the contraction cavity (1-1-4b); then it is ejected from the nozzle (1-1-4c) and destroys the rock mass through impact, hydraulic fracturing and cutting action; the feeding device (8) provides downward thrust to continue drilling downward.

Claims

1. A rotary laser jet radial drilling device, comprising a rotary laser jet drill (1), a flexible drill rod (2), a generator (3), a jet medium storage container (4), a pressurizing pump (5), a reel (6), a drill frame (7), a feeding device (8), and a ground control device (9); characterized in that: The flexible drill rod (2) is provided with a cable and a fluid channel; the starting end of the flexible drill rod (2) is connected to the reel (6) and wound on the reel (6); the end of the flexible drill rod (2) is connected to the rotary laser jet drill (1). The reel (6) is provided with a rotary cable connector and a rotary fluid connector. The rotary cable connector is connected to the cable inside the flexible drill rod (2), and the rotary fluid connector is connected to the fluid channel inside the flexible drill rod (2). The generator (3) is connected to the rotating cable joint of the reel (6) to provide electrical energy; The jet medium storage container (4) and the pressurizing pump (5) are connected in series and then connected to the rotary fluid connector of the reel (6) to provide high-pressure jet medium; The drill frame (7) is equipped with a feeding device (8), and the flexible drill rod (2) passes through the feeding device (8). The feeding device (8) provides drilling power to the flexible drill rod (2) and the rotary laser jet drill (1). The ground control device (9) is connected to the rotary laser jet drill (1) via wireless communication. The ground control device (9) converts ground commands into wireless signals and sends them to the rotary laser jet drill (1). The rotary laser jet drill (1) comprises: a drilling unit (1-1), a steering mechanism (1-2), and a remote control unit (1-3); characterized in that: The steering mechanism (1-2) has a cylindrical structure; the drilling unit (1-1) and the remote control unit (1-3) are located inside the steering mechanism (1-2); a claw-shaped limiter is provided at the end of the steering mechanism (1-2); The starting end of the drilling unit (1-1) is connected to the starting end of the steering device (1-2) via a rotating joint; and a driving device (1-2-7) is provided at the connection between the drilling unit (1-1) and the steering device (1-2) to drive the rotating joint to rotate. The remote control unit (1-3) is responsible for receiving ground control signals. The remote control unit (1-3) is connected to the cable inside the flexible drill rod (2) and provides power to the drilling unit (1-1) and the steering device (1-2). The drilling unit (1-1) includes a drill pipe joint (1-1-1), a hose (1-1-2), a drill bit joint (1-1-3), a rotary jet drill bit (1-1-4), a laser (1-1-5), an optical fiber (1-1-6), and a laser head (1-1-7); The drill pipe joint (1-1-1) connects the hose (1-1-2) to the fluid channel inside the flexible drill pipe (2); The drill bit connector (1-1-3) connects the flexible hose (1-1-2) to the rotary jet drill bit (1-1-4); The laser (1-1-5) is fixed at the starting end of the drilling unit (1-1), and the laser head (1-1-7) is fixed at the end of the drilling unit (1-1). The laser (1-1-5) and the laser head (1-1-7) are connected by an optical fiber (1-1-6). The laser head (1-1-7) and the rotary jet drill bit (1-1-4) are positioned at the claw-shaped limiter at the end of the deflector (1-2); The steering radius of the steering gear (1-2) is smaller than the drilling radius.

2. The rotary laser jet radial drilling device according to claim 1, characterized in that: The rotary jet drill bit (1-1-4) is provided with an impeller (1-1-4a), a contraction chamber (1-1-4b), and a nozzle (1-1-4c) in sequence from the jet inlet.

3. The rotary laser jet radial drilling device according to claim 1, characterized in that: The steering gear (1-2) is configured as a three-stage steering tube, consisting of a first-stage steering tube (1-2-1), a second-stage steering tube (1-2-2), and a third-stage steering tube (1-2-3). The first-stage steering tube (1-2-1), the second-stage steering tube (1-2-2), and the third-stage steering tube (1-2-3) are connected by a rotating joint between adjacent steering tubes, and the relative rotation between the steering tubes is achieved by a drive device (1-2-7), which is powered by a remote control unit (1-3). The connecting surfaces between adjacent steering tubes of the first-stage steering tube (1-2-1), the second-stage steering tube (1-2-2), and the third-stage steering tube (1-2-3) are set as inclined surfaces, so that the rotation axis b (1-2-5) of the second-stage steering tube (1-2-2) and the rotation axis c (1-2-6) of the third-stage steering tube (1-2-3) are offset; the inclined angles of the two connecting surfaces are the same in magnitude and opposite in direction; the range of the inclined angle is 20° to 70°; The contour of the connecting surface between two adjacent steering pipes of the first-stage steering pipe (1-2-1), the second-stage steering pipe (1-2-2), and the third-stage steering pipe (1-2-3) is set as a circle to ensure that the pipe body remains sealed during the rotation process; The pipe surface profile at the connection between two adjacent steering pipes of the first-level steering pipe (1-2-1), the second-level steering pipe (1-2-2), and the third-level steering pipe (1-2-3) is an ellipse. The shape of the ellipse satisfies the following mathematical relationship: the ratio of the minor axis to the major axis of the ellipse is equal to the cosine of the inclination angle of the connection surface. The connecting surfaces between adjacent steering tubes of the first-stage steering tube (1-2-1), the second-stage steering tube (1-2-2), and the third-stage steering tube (1-2-3) are parallel to the major axis of the ellipse in space.

4. A method for radial drilling using a rotating laser jet, characterized in that, The aforementioned rotary laser jet radial drilling method is based on a rotary laser jet radial drilling device, which mainly includes: a rotary laser jet drill (1), a flexible drill rod (2), a generator (3), a jet medium storage container (4), a pressurizing pump (5), a reel (6), a drill frame (7), a feeding device (8), and a ground control device (9). The aforementioned rotating laser jet radial drilling method, which uses laser assistance to break up rocks with a rotating jet and achieves radial drilling through a deflector, mainly includes the following steps: Step 1: The generator (3) provides power to the signal receiving and remote control unit (1-3) via the flexible drill rod (2); the remote control unit (1-3) receives the wireless signal transmitted by the ground control device (9); the drive device (1-2-7) is started to make the various levels of steering pipes (1-2-1, 1-2-2, 1-2-3) rotate, causing the first-level steering pipe (1-2-1) to rotate horizontally, and the second-level steering pipe (1-2-2) and the third-level steering pipe (1-2-3) to deflect, thereby driving the internal drilling unit (1-1) to turn. Step 2: After the turn is completed, the remote control unit (1-3) activates the laser (1-1-5) to generate a laser; the laser is transmitted to the laser head (1-1-7) through the optical fiber (1-1-6); the laser is emitted from the laser head (1-1-7) and acts on the surface of the rock mass, causing thermal stress inside the rock mass, leading to the development of rock mass fissures and increasing the porosity of the rock mass surface; Step 3: After the laser action is completed, the jet medium flows out from the jet medium storage container (4) and the pressurizing pump (5) to form a high-pressure fluid; it enters the rotary laser jet drill (1) through the flexible drill rod (2), and enters the rotary jet drill bit (1-1-4) after passing through the hose (1-1-2) and the drill bit connector (1-1-3); then, the jet medium flows through the impeller (1-1-4a) to obtain radial and tangential velocities, forming a rotating jet; the jet obtains high pressure through the contraction chamber (1-1-4b); then it is ejected from the nozzle (1-1-4c), destroying the rock mass through impact, hydraulic splitting and cutting action; the feeding device (8) provides downward thrust, and the drilling continues downward.

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