Coiled tubing drilling downhole system convenient to move and position

Abstract

Disclosed in the present invention is a coiled tubing drilling downhole system convenient to move and position. The downhole system comprises a base plate, wherein four through slots run through the bottom of the base plate, four universal wheels are provided at the bottom of the base plate, handlebars are fixed to one side of the top of the base plate, a support frame is provided above the base plate, four square tubes are fixed to the support frame, positioning and stabilizing assemblies are respectively provided inside the four square tubes, a traction roller is rotatably connected inside the support frame, and a first electric motor is fixed to one side of the support frame. The present invention relates to the technical field of oil exploration. The coiled tubing drilling downhole system convenient to move and position, by means of providing automatic soil-ramming mechanisms, automatically rams soil and gravel divided to two sides of the mouth of a borehole, and, by means of cooperation and linkage with automatic soil division assemblies, prevents loose soil and gravel around the mouth of the borehole from slipping into the borehole, thereby improving the drilling efficiency.

Description

A coiled tubing downhole drilling system that is convenient for mobile positioning Technical Field

[0001] The present invention relates to the technical field of petroleum exploration, in particular to a downhole continuous tubing drilling system which is convenient for movement and positioning. Background Art

[0002] The characteristics of coiled tubing drilling are no joints or diameter changes, small size, large curvature, continuous tripping, high strength, strong pressure resistance, and the ability to achieve dynamic sealing. It provides scientific, advanced, and safe technology for drilling and is widely used in oilfield drilling. In the redevelopment and utilization of oil wells, it increases oil and gas production and improves the economic benefits of oilfield enterprises, and has high economic value.

[0003] Referring to a Chinese patent, a coiled tubing electric drilling device (publication number: CN111441720A, publication date: 2020-07-24) solves the existing coiled tubing plus positive displacement screw motor drilling technology. Although it can accurately mobilize the reservoir, it is easily limited by the displacement of the positive displacement screw motor. In addition, the positive displacement screw motor has a pressure drop, resulting in excessive circulating pressure and the inability to circulate drilling fluid at a large displacement. As a result, when the coiled tubing is operating in a large wellbore, the drilling fluid annulus return velocity is too low and the drilling cuttings cannot be carried. This greatly limits the application range of the coiled tubing. However, the existing coiled tubing drilling system still has the following shortcomings:

[0004] (1) Existing coiled tubing drilling systems include cable and wireless systems. Cable systems are expensive, difficult to maintain, and have high requirements for the operating environment. Wireless systems currently cannot meet the increasingly stringent operational requirements, such as high build-up rates, high operational efficiency, and long downhole equipment life.

[0005] (2) After drilling, the soil and gravel drilled out by the drilling equipment will accumulate around the well. These soil and gravel are relatively loose. If they are not treated, the soil and gravel will pile up higher and higher, and eventually flow into the well, filling the well and affecting the drilling efficiency. There is a lack of automated soil processing equipment to efficiently process the soil and gravel;

[0006] (3) Existing drilling equipment is not easy to position and stabilize during drilling. During the drilling process, the equipment shakes a lot and is not stable enough, which easily leads to deviation in the drilling position.

[0007] To solve the above problems, we proposed a continuous tubing drilling downhole system that is easy to move and position.

[0008] Summary of the Invention

[0009] In view of the shortcomings of the existing technology, the present invention provides a coiled tubing downhole drilling system that is convenient for mobile positioning, which solves the technical problems mentioned in the background technology.

[0010] To achieve the above objectives, the present invention is implemented through the following technical solutions: a continuous oil tubing drilling downhole system that is convenient for movement and positioning, comprising a base plate, the bottom of the base plate is penetrated by four through slots, the bottom of the base plate is provided with four universal wheels, a handle is fixed to one side of the top of the base plate, a support frame is provided above the base plate, four square tubes are fixed on the support frame, and positioning and stabilizing components are provided inside the four square tubes, a traction roller is rotatably connected to the inside of the support frame, a first motor is fixed to one side of the support frame, the output end of the first motor is fixed to one side of the traction roller, and a Two vertical rods are fixed on the side, and a mobile frame is slidably connected between the opposite sides of the two vertical rods. A rotating roller is rotatably connected between the top ends of the two vertical rods. The traction roller and the rotating roller are connected by a traction rope. A pull ring is fixed on the top of the mobile frame, and one end of the traction rope is bound to the pull ring. The bottom of the mobile frame is sequentially installed with a connector, a motor head assembly, a weighting rod, a three-dimensional stabilizer, a continuous oil pipe directional indexing tool, a titanium alloy drill pipe, a directional joint, a downhole power drilling tool, and a drill bit. Two automatic tamping mechanisms are provided on one side of the top of the base plate, and automatic soil dividing components are provided on the two automatic tamping mechanisms.

[0011] Preferably, the motor head assembly provides a one-way valve, a release button, and a bypass circulation function.

[0012] Preferably, the three-dimensional stabilizer maintains the stability of bit pressure and torque through the interaction between the internal spring and the spiral, thereby extending the life of the drill bit, protecting ground equipment, and improving drilling efficiency.

[0013] Preferably, the coiled tubing directional indexing tool is a specialized tool for adjusting the tool face to allow directional drilling according to the designed trajectory.

[0014] Preferably, titanium alloy drill pipe (with built-in wireless measurement while drilling and logging instruments) provides a non-magnetic environment, accurately measures the azimuth, and titanium alloy drill pipes of different specifications can be selected according to the requirements of the build rate.

[0015] Preferably, the automatic tamping mechanism includes a vertical plate fixed on the top of the base plate, an L-shaped groove is opened through one side of the vertical plate, trapezoidal bars are fixed above and below one side of the vertical plate, one side of the vertical plate is slidably connected to a movable plate, the top and bottom of the movable plate are provided with inclined surfaces, the top and bottom of the movable plate are slidably connected to the inclined surfaces of the two trapezoidal bars, and an inclined groove is opened through one side of the movable plate.

[0016] Preferably, one side of the movable plate is slidably connected to a movable rod, one end of the movable rod is fixed with a movable column, one end of the movable column passes through the inclined groove and the L-shaped groove and extends to the outside of the L-shaped groove, the outer surface of the movable column is slidably connected to the inner surface of the inclined groove and the L-shaped groove, and the bottom of the movable rod is fixed with a fixed rod.

[0017] Preferably, the top end of the fixed rod passes through the moving rod and extends to the top of the moving rod, the bottom end of the fixed rod is fixed with a tamping plate, the top of the bottom plate is fixed with a motor seat, a second motor is fixed to one side of the motor seat, the output end of the second motor passes through the motor seat and extends to the other side of the motor seat, the output end of the second motor is fixed with a first rotating rod, one end of the first rotating rod is rotatably connected to the second rotating rod via a rotating shaft, and one end of the second rotating rod is rotatably connected to one side of the moving plate via a rotating shaft.

[0018] Preferably, the automatic soil dividing assembly includes an L-shaped plate slidably connected to the other side of the vertical plate, an electric telescopic rod is fixed to the bottom of the L-shaped plate, a soil dividing plate is fixed to one side of the movable plate, a mounting plate is fixed to one side of the soil dividing plate, the output end of the electric telescopic rod is fixed to the top of the mounting plate, and the tamping plate is slidably connected to one side of the soil dividing plate.

[0019] Preferably, the positioning and stabilizing component includes a fixing block fixed inside the square tube, the inner surface of the fixing block is threadedly connected to a threaded rod, and the top end of the threaded rod passes through the fixing block and extends to the top of the square tube.

[0020] Preferably, a rotating handle is fixed to the top end of the threaded rod, and the bottom end of the threaded rod passes through the fixing block and extends to the outside of the fixing block.

[0021] Preferably, a soil drilling rod is fixed to the bottom end of the threaded rod, the bottom end of the threaded rod is fixed to the top end of the soil drilling rod, and the bottom end of the soil drilling rod passes through the square tube and the through groove and extends to the bottom of the bottom plate. Beneficial effects

[0022] The present invention provides a coiled tubing downhole drilling system that is easy to move and position. Compared with the existing technology, it has the following advantages:

[0023] (1) The continuous tubing drilling downhole system that is easy to move and position can realize the rapid positioning and stabilization of the drilling equipment by setting the positioning and stabilization components. The stability of the drilling is further improved by adjusting the drilling parameters and combining drilling speed-up tools such as hydraulic oscillators and three-dimensional stabilizers, making the equipment work more stably during the drilling process. The setting of four universal wheels can realize the rapid transportation and movement of the drilling equipment, which is highly flexible and improves the transportation efficiency.

[0024] (2) The continuous tubing drilling downhole system, which is easy to move and position, realizes automatic compaction of the soil and gravel divided on both sides of the drilling mouth through the setting of the automatic tamping mechanism. It cooperates with the automatic soil dividing component to prevent the loose soil and gravel around the drilling mouth from sliding into the borehole, thereby improving the drilling efficiency.

[0025] (3) The continuous tubing drilling downhole system that is easy to move and position achieves a high inclination rate through a double-bend motor or a flexible motor. Through the arrangement of a motor head assembly, a weighting rod, a three-dimensional stabilizer, a continuous tubing directional indexing tool, a titanium alloy drill pipe, a directional joint, a downhole power drilling tool, and a drill bit, the system has a reasonable structural design, is easy to operate, and has a wide adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a perspective view of the external structure of the present invention;

[0027] FIG2 is a side view of the external structure of the present invention;

[0028] FIG3 is a bottom view of the external structure of the present invention;

[0029] FIG4 is a perspective view of a partial structure of the present invention;

[0030] FIG5 is a cross-sectional view of a square tube of the present invention;

[0031] FIG6 is a perspective view of the automatic soil separation assembly and the automatic soil tamping mechanism of the present invention;

[0032] FIG7 is an exploded view of the automatic soil dividing assembly and the automatic soil tamping mechanism of the present invention.

[0033] Figure: 1, bottom plate; 2, through slot; 3, universal wheel; 4, handlebar; 5, support frame; 6, square tube; 7, positioning and stabilizing component; 8, traction roller; 9, first motor; 10, vertical rod; 11, mobile frame; 12, rotating roller; 13, traction rope; 14, pull ring; 15, automatic tamping mechanism; 16, automatic soil separation component; 17, connector; 18, motor head assembly; 19, weighting rod; 20, three-dimensional stabilizer; 21, coiled tubing directional indexing tool; 22, titanium alloy drill pipe; 23, directional joint; 24, downhole power Drilling tools; 25, drill bit; 151, vertical plate; 152, L-shaped groove; 153, trapezoidal bar; 154, movable plate; 155, inclined groove; 156, movable rod; 157, movable column; 158, fixed rod; 159, tamping plate; 1510, motor base; 1511, second motor; 1512, first rotating rod; 1513, second rotating rod; 161, L-shaped plate; 162, electric telescopic rod; 163, soil dividing plate; 164, mounting plate; 71, fixed block; 72, threaded rod; 73, rotating handle; 74, drilling rod. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] The present invention provides two technical solutions, including the following embodiments:

[0036] Example 1

[0037] Please refer to Figures 1-4. A continuous tubing drilling downhole system that is convenient for movement and positioning includes a base plate 1. Four through slots 2 are opened through the bottom of the base plate 1. Four universal wheels 3 are set at the bottom of the base plate 1. A handlebar 4 is fixed to one side of the top of the base plate 1. A support frame 5 is set above the base plate 1. Four square tubes 6 are fixed on the support frame 5. The interior of the four square tubes 6 is provided with a positioning and stabilizing component 7. The interior of the support frame 5 is connected to a traction roller 8 for rotation. A first motor 9 is fixed to one side of the support frame 5. The first motor 9 is a three-phase asynchronous motor that can be reversed and is controlled by an external switch and electrically connected to an external power supply. The output end of the first motor 9 is fixed to one side of the traction roller 8. One side of the top of the base plate 1 Two vertical rods 10 are fixed, and a mobile frame 11 is slidably connected between the opposite sides of the two vertical rods 10. A rotating roller 12 is rotatably connected between the tops of the two vertical rods 10. The traction roller 8 and the rotating roller 12 are connected by a traction rope 13. A pull ring 14 is fixed on the top of the mobile frame 11, and one end of the traction rope 13 is bound to the pull ring 14. When the first motor 9 rotates forward, it can drive the traction roller 8 to retract the rope, and the traction rope 13 drives the mobile frame 11 to move up. When reversed, it drives the mobile frame 11 to move down. After moving down, it is convenient for the drill bit 25 to drill. The bottom of the mobile frame 11 is installed with a connector 17, a motor head assembly 18, a weight rod 19, a three-dimensional stabilizer 20, a continuous oil pipe directional indexing tool 21, a titanium alloy Gold drill pipe 22, directional joint 23, downhole power drilling tool 24, drill bit 25, drill bit 25 is a tool for breaking rocks and forming wellbore during drilling. The drill bit is driven by the downhole power motor to rotate and drill, thereby driving the entire drill bit to produce centripetal motion, cutting, grinding, causing the rock to crack and break, playing the role of downward drilling. A drilling mud lifting system is set on the ground. The drilling mud lifting system is used to lift soil and drill cuttings from the bottom of the well to the ground. The rock cuttings in the well are circulated to the ground through the mud. The drilling depth is 3000 meters and the deepest can reach more than 5000 meters. The system usually includes a mud lifting pump and a mud gas separator. The mud lifting pump pumps soil and drill cuttings to the ground under pressure, while the mud gas separator The separator is used to separate gas and solid particles to ensure safe handling. Currently, there are many types of drill bits used in the oil industry, which can be divided into PDC drill bits, roller cone drill bits, and scraper drill bits. The downhole power drilling tool 24 is a directional and deflecting tool used for drilling. It is divided into three categories: motor / screw, turbine, and electric drilling tools. Motor / screw drilling tools are more commonly used, especially for short radius and ultra-short radius drilling. Motor / screw drilling tools are recommended, and high-angle or double-angle motor / screw drilling tools are used according to the curvature radius requirements. The upper and lower ends of the directional joint 23 can be connected to flexible MWD tools, US friction and drag reduction tools, and drilling jars. Directional operation is achieved by rotating the tool face through an indexing tool, and then adjusting the tool face orientation to the required direction with the help of bit pressure.Flexible MWD tools are measurement while drilling (MWD) logging tools, which are divided into wired and wireless MWD. ​​Wired MWD requires cables, which are expensive, difficult to maintain, and have high requirements for the operating environment. Wireless MWD has higher performance requirements for the instrument because the continuous tubing is long, generally more than 5,000 meters, and requires a strong and stable signal. For short-radius and ultra-short-radius drilling, MWD and external non-magnetic drill bits are also required to have a certain degree of flexibility to smoothly pass through high-inclination sections. High inclinations are achieved through double-bend motors or flexible motors. US friction and drag reduction tools are used in well conditions with large friction resistance, such as short radius or ultra-short radius, and to increase the drilling extension length of horizontal wells. The MWD jar is used to jar and unblock when a stuck condition occurs underground. The titanium alloy drill pipe 22 is a lightweight drill pipe that can effectively reduce the friction and torque of horizontal well drilling tools, thereby significantly and effectively extending the horizontal offset and horizontal section length. Its stress corrosion fatigue strength is more than 10 times higher than that of the currently used carbon steel. In terms of mechanical strength, flexibility, corrosion resistance and low specific gravity, the titanium alloy drill pipe 22 can be used in conventional wells and is also suitable for ultra-short radius wells, ultra-large displacement wells and other difficult drilling conditions. In addition, the use of a lightweight drill string composed of titanium alloy drill pipes can reduce the load on the hook, reduce torque and friction, and further improve the mechanical penetration rate. At the same time, titanium alloy also has non-magnetic characteristics. The continuous tubing indexing tool 21, since the continuous tubing cannot rotate, requires a special tool for adjusting the tool face in combination to orient it according to the designed trajectory. During drilling, the coiled tubing indexing tool 21 rotates the lower end of the tool through the displacement and pressure control of the surface pump, driving the MWD and motor below the tool to rotate a certain angle. The angle of rotation can be adjusted by pressure, so that the angle can be adjusted steplessly. The coiled tubing indexing tool 21 is powered by the pressure generated by the fluid. When the pressure inside the tool reaches its threshold pressure, it rotates a certain angle at a certain pressure. The maximum angle it can rotate clockwise is a certain angle each time. When the pressure drops below the threshold pressure, the tool resets. When the pressure is increased again to reach the threshold pressure, it can continue to rotate clockwise. This directional indexing tool needs to generate high torque, enough to overcome The torque generated by the downhole power drill used with the BHA is used to swing the tool face through an indexing tool, rotating it by a certain angle (e.g., 35°) each time the pump is turned on and off, and then fine-tuned to the desired tool face using the weight on bit. The three-dimensional stabilizer 20 maintains the stability of the weight on bit and torque through the interaction of internal springs and spirals, extending the life of the drill bit, protecting surface equipment, improving drilling efficiency, and eliminating the effects of stick-slip on drilling. Maintaining constant torque and weight on bit allows the use of more aggressive drill bits, increasing drilling speeds, and reducing the impact of downhole vibration on expensive tools, instruments, and drill bits in the drill tool assembly, thereby improving drilling efficiency and profitability.To reduce operational risks, the motor head assembly 18 consists of a double-flap check valve, a hydraulic release tool, and a circulation valve. As an emergency handling tool, circulation can be established through the blasting disc through-hole or a ball can be dropped to cut the release pin, disconnect the tool string, and recover the coiled tubing to facilitate subsequent salvage. If the drill bit is buried and a flow channel cannot be established, the operating steps are as follows: The circulation bypass and emergency release functions of the motor head assembly require steel balls to be dropped. The circulation bypass valve is at the bottom of the tool. Installing a suitable blasting disc has two uses when the drill is stuck: 1. If the drill bit is buried and circulation is impossible, the coiled tubing can be used to build up pressure, open the blasting disc, connect the internal and external channels of the coiled tubing, establish a circulation channel, and release the jam; 2. If an emergency release is required, after testing the circulation channel with the blasting disc to ensure it is unobstructed, insert the corresponding steel ball and pressurize it to the set pressure value (the pressure can be adjusted by installing a corresponding number of shear pins according to site requirements), and then release the tool. After releasing the tool, the GS-type salvage tool can be lowered to salvage the motor head assembly to complete the salvage of the downhole tool. Due to the high flexibility of the coiled tubing, the addition of a weight rod to the assembly increases the rigidity of the drill assembly and plays a role in applying bit pressure. Two automatic tamping mechanisms 15 are provided on one side of the top of the base plate 1, and the two automatic tamping mechanisms 15 are equipped with automatic soil separation components 16.

[0038] Example 2

[0039] Based on Example 1, see Figures 5-7

[0040] The automatic tamping mechanism 15 includes a vertical plate 151 fixed to the top of the base plate, an L-shaped groove 152 is opened through one side of the vertical plate 151, trapezoidal bars 153 are fixed above and below one side of the vertical plate 151, and a movable plate 154 is slidably connected to one side of the vertical plate 151. The top and bottom of the movable plate 154 are provided with inclined surfaces, and the top and bottom of the movable plate 154 are slidably connected to the inclined surfaces of the two trapezoidal bars 153, and an inclined groove 155 is opened through one side of the movable plate 154.

[0041] A moving rod 156 is slidably connected to one side of the moving plate 154, and a moving column 157 is fixed to one end of the moving rod 156. One end of the moving column 157 passes through the inclined groove 155 and the L-shaped groove 152 and extends to the outside of the L-shaped groove 152. The outer surface of the moving column 157 is slidably connected to the inner surface of the inclined groove 155 and the L-shaped groove 152, and a fixed rod 158 is fixed to the bottom of the moving rod 156.

[0042] The top of the fixed rod 158 passes through the moving rod 156 and extends to the top of the moving rod 156. The bottom end of the fixed rod 158 is fixed with a tamping plate 159. The top of the base plate 1 is fixed with a motor base 1510. A second motor 1511 is fixed to one side of the motor base 1510. The second motor 1511 is controlled by the same external switch and is electrically connected to an external power supply. The output end of the second motor 1511 passes through the motor base 1510 and extends to the other side of the motor base 1510. The output end of the second motor 1511 is fixed with a first rotating rod 1512. One end of the first rotating rod 1512 is rotatably connected to the second rotating rod 1513 via a rotating shaft. One end of the second rotating rod 1513 is rotatably connected to one side of the moving plate 154 via a rotating shaft.

[0043] The automatic soil division component 16 includes an L-shaped plate 161 slidably connected to the other side of the vertical plate. An electric telescopic rod 162 is fixed to the bottom of the L-shaped plate 161. The electric telescopic rod 162 is a prior art. The two electric telescopic rods 162 are controlled and started by the same external single-chip microcomputer. The single-chip microcomputer can control the time interval between the opening and closing of the electric telescopic rods 162 (when the moving plate 154 is reset, the two electric telescopic rods 162 are controlled to be closed, and when the two moving plates 154 move back to back, the two electric telescopic rods 162 are controlled to be started). It is electrically connected to the external power supply. A soil dividing plate 163 is fixed to one side of the movable plate 154, a mounting plate 164 is fixed to one side of the soil dividing plate 163, the output end of the electric telescopic rod 162 is fixed to the top of the mounting plate 164, and the tamping plate 159 is slidably connected to one side of the soil dividing plate 163. Through the setting of the automatic tamping mechanism 15, the soil and gravel divided on both sides of the drilling mouth are automatically compacted, and the automatic soil dividing component 16 is coordinated and linked to avoid the loose soil and gravel around the drilling mouth from sliding into the drilling well, thereby improving the drilling efficiency.

[0044] The positioning and stabilizing component 7 includes a fixing block 71 fixed inside the square tube 6 . The inner surface of the fixing block 71 is threadedly connected with a threaded rod 72 . The top end of the threaded rod 72 passes through the fixing block 71 and extends to the top of the square tube 6 .

[0045] A rotating handle 73 is fixed to the top end of the threaded rod 72 , and the bottom end of the threaded rod 72 passes through the fixing block 71 and extends to the outside of the fixing block 71 .

[0046] A drilling rod 74 is fixed to the bottom end of the threaded rod 72, and the bottom end of the threaded rod 72 is fixed to the top end of the drilling rod 74. The bottom end of the drilling rod 74 passes through the square tube 6 and the through groove 2 and extends to the bottom of the base plate 1. Through the setting of the positioning and stabilization component 7, the drilling equipment can be quickly positioned and stabilized, making the equipment work more stably during the drilling process. Through the setting of the four universal wheels 3, the drilling equipment can be quickly transported and moved, with high flexibility and improved transportation efficiency. The positioning and stabilization component 7 can adjust the depth of the drilling rod 74 entering the soil according to the depth of drilling. The deeper the drilling rod 74 drills, the more stable the entire system is.

[0047] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0048] During operation, by rotating the four rotating handles 73, the rotating handles 73 drive the threaded rod 72 to rotate, and the threaded rod 72 moves downward along the inner surface of the fixed block 71, and the threaded rod 72 drives the drilling rod 74 to rotate downward, and finally the drilling rod 74 drills into the soil to complete the fixation, and the drilling work is carried out by starting the drill bit 25. At the same time, the two electric telescopic rods 162 are started, so that the electric telescopic rod 162 drives the two soil dividing plates 163 to move downward, and the two second motors 1511 are further started, so that the two second motors 1511 drive the two first rotating rods 1512 to rotate, and the two first rotating rods 1512 drive the two second rotating rods 1513 to rotate, and the two second rotating rods 1513 drive the two movable plates 154 to move back and forth, and the two movable plates 154 move back and forth while driving the two movable columns 157 along the inner surface of the L-shaped groove 152. Sliding horizontally, when the two moving columns 157 move to the corner of the L-shaped groove 152, the moving column 157 slides downward along the inner surface of the inclined groove 155, and the moving column 157 slides downward along the inner surface of the L-shaped groove 152. At the same time, the moving column 157 drives the moving rod 156, the fixed rod 158 and the tamping plate 159 to move downward, and finally the tamping plate 159 tamps the soil and gravel on one side of the soil dividing plate 163. When the moving plate 154 is reset, the electric telescopic rod 162 is turned off, so that the electric telescopic rod 162 drives the soil dividing plate 163 to move up and reset, and repeats the above process to achieve the tamping of the soil and gravel accumulated around the drilling well. Through the setting of the automatic soil dividing component 16, the soil and gravel drilled out during the drilling process are moved to both sides of the drilling well mouth, so that the land around the drilling well mouth becomes flat, which is convenient for workers to operate equipment around the drilling well mouth.

[0049] The above embodiments of the invention are described in detail, but the contents are only preferred embodiments of the invention and should not be considered to limit the scope of the invention. All equivalent changes and improvements made within the scope of the invention should still fall within the scope of the invention.

Claims

1. A coiled tubing downhole drilling system that is convenient for mobile positioning, comprising a base plate (1), characterized in that: The bottom of the base plate (1) is provided with four through slots (2), the bottom of the base plate (1) is provided with four universal wheels (3), a handlebar (4) is fixed to one side of the top of the base plate (1), a support frame (5) is provided above the base plate (1), four square tubes (6) are fixed to the support frame (5), the interior of the four square tubes (6) are provided with positioning and stabilizing components (7), a traction roller (8) is rotatably connected to the interior of the support frame (5), a first motor (9) is fixed to one side of the support frame (5), the output end of the first motor (9) is fixed to one side of the traction roller (8), two vertical rods (10) are fixed to one side of the top of the base plate (1), a moving frame (11) is slidably connected between the opposite sides of the two vertical rods (10), and the two vertical rods (10) are connected to the moving frame (11) in a sliding manner. A rotating roller (12) is rotatably connected between the top ends of the rods (10); the traction roller (8) and the rotating roller (12) are connected in transmission via a traction rope (13); a pull ring (14) is fixed on the top of the mobile frame (11); one end of the traction rope (13) is bound to the pull ring (14); a connector (17), a motor head assembly (18), a weighting rod (19), a three-dimensional stabilizer (20), a continuous tubing directional indexing tool (21), a titanium alloy drill pipe (22), a directional joint (23), a downhole power drilling tool (24), and a drill bit (25) are sequentially installed on the bottom of the mobile frame (11) from top to bottom; two automatic tamping mechanisms (15) are arranged on one side of the top of the base plate (1); and automatic soil dividing components (16) are arranged on the two automatic tamping mechanisms (15).

2. The coiled tubing downhole drilling system that is convenient for mobile positioning according to claim 1 is characterized in that: The automatic tamping mechanism (15) comprises a vertical plate (151) fixed on the top of the bottom plate (1), an L-shaped groove (152) is provided through one side of the vertical plate (151), trapezoidal bars (153) are fixed above and below one side of the vertical plate (151), a movable plate (154) is slidably connected to one side of the vertical plate (151), the top and bottom of the movable plate (154) are provided with inclined surfaces, the top and bottom of the movable plate (154) are slidably connected to the inclined surfaces of the two trapezoidal bars (153), and an inclined groove (155) is provided through one side of the movable plate (154).

3. The coiled tubing downhole drilling system that is convenient for mobile positioning according to claim 2 is characterized in that: A moving rod (156) is slidably connected to one side of the moving plate (154), a moving column (157) is fixed to one end of the moving rod (156), one end of the moving column (157) passes through the inclined groove (155) and the L-shaped groove (152) and extends to the outside of the L-shaped groove (152), the outer surface of the moving column (157) is slidably connected to the inner surfaces of the inclined groove (155) and the L-shaped groove (152), and a fixed rod (158) is fixed to the bottom of the moving rod (156).

4. The coiled tubing downhole drilling system that is convenient for mobile positioning according to claim 3 is characterized by: The top end of the fixed rod (158) passes through the moving rod (156) and extends to the top of the moving rod (156); the bottom end of the fixed rod (158) is fixed with a tamping plate (159); the top of the bottom plate (1) is fixed with a motor seat (1510); one side of the motor seat (1510) is fixed with a second motor (1511); the output end of the second motor (1511) passes through the motor seat (1510) and extends to the other side of the motor seat (1510); the output end of the second motor (1511) is fixed with a first rotating rod (1512); one end of the first rotating rod (1512) is rotatably connected to a second rotating rod (1513) via a rotating shaft; one end of the second rotating rod (1513) is rotatably connected to one side of the moving plate (154) via a rotating shaft.

5. The coiled tubing downhole drilling system that is convenient for mobile positioning according to claim 4 is characterized in that: The automatic soil dividing component (16) comprises an L-shaped plate (161) slidably connected to the other side of the vertical plate (151); an electric telescopic rod (162) is fixed to the bottom of the L-shaped plate (161); a soil dividing plate (163) is fixed to one side of the movable plate (154); a mounting plate (164) is fixed to one side of the soil dividing plate (163); an output end of the electric telescopic rod (162) is fixed to the top of the mounting plate (164); and the tamping plate (159) is slidably connected to one side of the soil dividing plate (163).

6. The downhole coiled tubing drilling system that is convenient for mobile positioning according to claim 1 is characterized by: The positioning and stabilizing component (7) comprises a fixing block (71) fixed inside the square tube (6), the inner surface of the fixing block (71) is threadedly connected with a threaded rod (72), and the top end of the threaded rod (72) passes through the fixing block (71) and extends to the top of the square tube (6).

7. The downhole coiled tubing drilling system that is convenient for mobile positioning according to claim 6 is characterized by: A rotating handle (73) is fixed to the top end of the threaded rod (72), and the bottom end of the threaded rod (72) penetrates the fixing block (71) and extends to the outside of the fixing block (71).

8. The downhole coiled tubing drilling system that is convenient for mobile positioning according to claim 6 is characterized by: A soil boring rod (74) is fixed to the bottom end of the threaded rod (72), the bottom end of the threaded rod (72) is fixed to the top end of the soil boring rod (74), and the bottom end of the soil boring rod (74) passes through the square tube (6) and the through groove (2) and extends to the bottom of the bottom plate (1).

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