A device for enhancing, uniformly unblocking and increasing production of horizontal wells by using coiled tubing and a method for unblocking and increasing production

Abstract

The application discloses a coiled tubing energy-increasing uniform plugging-removing and production-increasing device for horizontal wells and a plugging-removing and production-increasing method, and the device comprises a propelling assembly, a plugging assembly and a plugging-removing assembly; the propelling assembly comprises a base, a clamping seat clamped on the base, an electric push rod arranged on the base and connected with the clamping seat, a propelling roller arranged in the clamping seat and a first micro motor for providing power for the propelling roller; the plugging assembly comprises a connecting hose, a plugging disc arranged at the end of the connecting hose, rubber plugging bags arranged in the circumferential direction of the plugging disc and an expanding assembly arranged on the plugging disc; the plugging-removing assembly comprises a mounting rod arranged on the plugging disc, a high-pressure nozzle hingedly connected to the mounting rod, a plugging-removing pipe arranged in the connecting hose and connected with the high-pressure nozzle and a high-pressure pump connected with the plugging-removing pipe; the device has high plugging-removing efficiency and effectively improves the productivity of the horizontal well, and is suitable for popularization and use.

Description

Technical Field

[0001] This invention relates to the field of oilfield development technology, specifically to a device and method for enhancing the energy and uniformity of horizontal well coiled tubing for unblocking and increasing production. Background Technology

[0002] A horizontal well is created by drilling vertically or inclined to the oil-bearing formation, then drilling the drill string in a direction parallel to the formation, forming a horizontal wellbore within the formation. This allows for drilling through long sections of the oil-bearing formation until completion. Traditional oil wells often penetrate the formation vertically or inclined, resulting in shorter well sections and lower production efficiency. Horizontal well technology, with its longer well sections through the oil-bearing formation, significantly increases production capacity compared to traditional wells and has been widely adopted in oilfield development in recent years.

[0003] Currently, the main well-washing and unblocking processes for coalbed methane horizontal wells include: 1. High-volume flushing with clean water in the tubing: This process is simple to operate and convenient to construct, but its unblocking efficiency is relatively low; 2. Hydraulic positive circulation vortex flushing: This process is effective for unblocking blockages at screen pipe orifices and blockages caused by collapse of the screen pipe outer well wall, but its effect on unblocking and permeability enhancement of near-wellbore reservoir contamination is average, and its flushing effect on sediment blockages in the depressions of wave-shaped horizontal wellbore is poor; 3. Nitrogen foam reverse circulation flushing: This process uses nitrogen foam as the washing fluid to flush the wellbore in reverse circulation. It has a strong backflow and rock-carrying capacity and a good effect on flushing and unblocking blockages in the wellbore, but its cost is relatively high, and its effect on unblocking blockages at screen pipe orifices and near-wellbore contamination is average. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a device and method for enhancing the production of horizontal wells by uniformly unblocking and improving the quality of coiled tubing.

[0005] The technical solution of the present invention is as follows: a coiled tubing energy enhancement and uniform unblocking production enhancement device for horizontal wells, comprising a propulsion assembly disposed at the wellhead of the horizontal well, a sealing assembly connected to the propulsion assembly, and an unblocking assembly connected to the sealing assembly; the propulsion assembly comprises a base with a through hole at the center, several clamping seats slidably engaged on the base and located around the through hole, several electric push rods disposed on the base and fixedly connected to each clamping seat in a one-to-one correspondence, several propulsion rollers disposed in a one-to-one correspondence inside each clamping seat, and several first micro motors disposed inside each clamping seat and providing power to each propulsion roller;

[0006] The plugging assembly includes a connecting hose that penetrates the through-hole and extends into the horizontal well, two plugging discs fixedly connected to the ends of the connecting hose, rubber plugging bladders respectively disposed around the two plugging discs, and expansion assemblies respectively disposed on the two plugging discs for supporting the rubber plugging bladders; one plugging disc is fixedly connected to the end of the connecting hose, and the other plugging disc is fixedly connected to the plugging disc near the connecting hose by several tie rods; the plugging disc is hollow inside and has a first ferrule and a second ferrule arranged sequentially inside;

[0007] The unblocking assembly includes several mounting rods positioned between two sealing discs and corresponding to each tie rod, an array of high-pressure nozzles movably hinged to the mounting rods, an unblocking pipe positioned inside the connecting hose and connected to each high-pressure nozzle via a capillary tube, and a high-pressure pump positioned outside the horizontal well and connected to the unblocking pipe.

[0008] Furthermore, the expansion assembly includes several expansion rods rotatably engaged with the circumference of the sealing disc, arc-shaped tiles movably hinged to the ends of each expansion rod and abutting against the inner wall of the rubber sealing bladder, a first gear ring disposed inside the sealing disc and located outside the first sleeve, and a second micro motor disposed inside the sealing disc and providing power to the first gear ring; each expansion rod is provided with a gear at the connection point with the sealing disc, and each gear meshes with the first gear ring respectively;

[0009] Instructions: During use, the second micro motor drives the first gear ring to rotate, which in turn causes each gear to rotate under the action of the first gear ring. This causes the expansion rod to deflect at a certain angle, and finally uses the arc-shaped tiles to open the rubber sealing bladder, creating a sealed space between the two sealing discs and the inner wall of the wellbore. This facilitates the segmented unblocking operation of the inner wall of the wellbore and improves the unblocking effect.

[0010] Furthermore, a rotating disc is rotatably engaged on the sealing disc away from the connecting hose, and a rotating flexible shaft is installed inside the connecting hose that passes through the two sealing discs and is connected to the rotating disc. Several breaking plates are evenly distributed around the circumference of the rotating disc; a power motor connected to the rotating flexible shaft is installed outside the horizontal well.

[0011] Explanation: When the connecting hose is inserted into the horizontal well shaft, the power motor drives the rotating flexible shaft to rotate, and the rotating disc drives the crushing plate to rotate, thereby crushing and clearing the blockages such as ore accumulated inside the well shaft, thus improving the production efficiency of the horizontal well.

[0012] Furthermore, each crushing plate is equipped with teeth, and each crushing plate has auxiliary cutting strips on both sides.

[0013] Note: By setting teeth and auxiliary cutting strips on the crushing plate, the crushing effect of the crushing plate on blockages in the well shaft can be improved.

[0014] Furthermore, each high-pressure nozzle is slidably engaged with the tie rod at its corresponding position; an adjusting pressure plate and a docking plate are respectively provided on opposite sides of the two sealing discs; the adjusting pressure plate is rotatably engaged with the sealing disc at its corresponding position, and a second gear ring is provided on one side of the adjusting pressure plate, penetrating the sealing disc, and a third micro motor is provided on the second sleeve to provide power to the second gear ring; a limiting groove is provided on the other side of the adjusting disc to slidably engage with each mounting rod, and a wedge-shaped slider is provided inside the limiting groove to abut against each mounting rod; a docking hole is provided on the docking plate at the corresponding position of each mounting rod, and a return spring is provided inside each docking hole.

[0015] Explanation: The third micro motor drives the adjusting pressure plate to rotate the second gear ring, which in turn makes the adjusting pressure plate rotate on the corresponding unblocking plate. The wedge-shaped slider on the adjusting pressure plate pushes each mounting rod to move back and forth in the docking hole on the docking plate, so that the high-pressure nozzle on each mounting rod can swing on the pull rod, improving the uniformity of the unblocking effect inside the wellbore.

[0016] Furthermore, a ball head is rotatably engaged at the connection between the mounting rod and the wedge-shaped slider;

[0017] Note: By setting a ball head on the mounting rod, not only can the smoothness of the mounting rod's movement be improved, but the wear between the mounting rod and the wedge slider can also be reduced.

[0018] Furthermore, guide discs are provided on the sides of the two sealing discs that are far apart, and several guide wheels are equidistantly distributed around the guide discs.

[0019] Note: By setting guide discs and guide wheels, the sealing component can be prevented from being damaged by friction with the inner wall of the wellbore during its movement inside the wellbore. At the same time, it can also make the sealing component enter the wellbore smoothly, thus improving the reliability of the invention.

[0020] Furthermore, the rotating flexible shaft is fitted with a corrosion-resistant and wear-resistant sleeve.

[0021] Note: By installing an anti-corrosion and wear-resistant sleeve on the outside of the rotating flexible shaft, damage caused by the unblocking fluid during use can be prevented.

[0022] Furthermore, a pressure sensor is installed between the two sealing discs, a return pipe is installed inside the connecting hose that penetrates the sealing discs, and a suction pump connected to the return pipe and a monitoring host electrically connected to the pressure sensor are installed outside the horizontal well.

[0023] Explanation: Pressure sensors are used to detect the pressure between the two sealing discs and the wellbore. When the pressure exceeds the preset value, the backflow fluid inside the wellbore is discharged through the backflow pipe, thereby preventing excessive pressure inside the horizontal well from posing a safety threat to the horizontal well.

[0024] Furthermore, each propulsion roller is equipped with anti-slip stripes;

[0025] Note: By setting anti-slip stripes on the push rollers, slippage can be prevented when the connecting hose enters the wellbore, thus improving the unclogging efficiency of horizontal wells.

[0026] This invention also provides a method for enhancing the uniform unblocking and production of coiled tubing in horizontal wells, comprising the following steps:

[0027] S1. Connect the electric push rod, the first micro motor, the expansion assembly and the high-pressure pump to the external power source respectively;

[0028] S2. Fix the base at the wellhead of the horizontal well and make the through hole on the base face the wellhead of the horizontal well; turn on the electric push rod, and after the electric push rod retracts, it will drive each clamping seat to slide on the base and move away from each other;

[0029] S3. Insert the plugging and unplugging components into the horizontal wellbore through the through hole; turn on the electric push rod, so that the electric push rod extends and pulls each clamping seat closer to each other, and makes each push roller abut against the outer wall of the connecting hose; then turn on each first micro motor, and use each first micro motor to drive each push roller to rotate, and finally make the plugging and unplugging components enter the predetermined position inside the horizontal wellbore.

[0030] S4. Activate the two expansion components to expand the rubber sealing bladders on the two sealing discs, thereby achieving a seal between the two sealing discs and the inner wall of the wellbore.

[0031] S5. Turn on the high-pressure pump and use it to inject the external unblocking fluid into each high-pressure nozzle through the unblocking pipe. This will allow for high-pressure injection of the unblocking fluid into the blocked holes inside the horizontal wellbore to unblock them.

[0032] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects:

[0033] First, the present invention utilizes a propulsion component to continuously insert a connecting hose into the horizontal wellbore, uses two sealing discs to seal the inside of the wellbore, and finally uses a deblocking component to deblock a specific area inside the horizontal well, effectively improving the deblocking effect and efficiency of the horizontal well and increasing the productivity of the horizontal well.

[0034] Secondly, the plugging component of the present invention can reach any area inside the horizontal well under the action of the propulsion component, thereby enabling uniform acidizing and plugging operations in the horizontal well, increasing the effectiveness of acidizing in the horizontal well section, improving reservoir permeability, and enhancing the development effect of the horizontal well.

[0035] Third, this invention utilizes a circulating oscillating high-pressure nozzle to efficiently clean the mud and attached mud cake in the annulus, pores, and fractures of the horizontal well wall, improving the unblocking effect of the horizontal well, increasing the permeability of the formation, thereby increasing the production of the horizontal well and providing economic efficiency. Attached Figure Description

[0036] Figure 1 This is a longitudinal sectional view of the present invention;

[0037] Figure 2 This is a schematic diagram of the propulsion component of the present invention;

[0038] Figure 3 This is a schematic diagram showing the connection between the clamping seat and the connecting hose of the present invention;

[0039] Figure 4 This is a schematic diagram showing the connection between the sealing component and the unsealing component of the present invention;

[0040] Figure 5 This is the invention Figure 4 A magnified view of a portion of point A in the middle;

[0041] Figure 6 This is a schematic diagram of the structure of the expansion component of the present invention;

[0042] Figure 7 This is the present invention. Figure 4 A magnified view of a portion of point B in the middle;

[0043] Figure 8 This is a schematic diagram showing the connection between the high-pressure nozzle and the adjusting pressure plate of the present invention;

[0044] Figure 9 This is a schematic diagram showing the connection between the rotating disk and the guide disk of the present invention;

[0045] Among them, 1-propulsion assembly, 10-base, 100-through hole, 11-clamping seat, 12-electric push rod, 13-propulsion roller, 14-first micro motor, 2-sealing assembly, 20-connecting hose, 21-sealing disc, 210-pull rod, 211-first ferrule, 212-second ferrule, 22-rubber sealing bladder, 23-expansion assembly, 230-expansion rod, 2300-gear, 231-arc tile, 232-first gear ring, 233-second micro motor, 24-guide disc, 240-guide Wheel, 25-Return pipe, 26-Suction pump, 3-Unblocking component, 30-Mounting rod, 300-Ball head, 31-High pressure nozzle, 32-Unblocking pipe, 33-High pressure pump, 34-Rotating disc, 340-Rotating flexible shaft, 341-Crushing plate, 3410-Tooth, 3411-Auxiliary cutting strip, 342-Power motor, 35-Adjusting pressure plate, 350-Second gear ring, 351-Limiting groove, 352-Wedge slider, 36-Mating disc, 360-Mating hole, 361-Reset spring, 37-Third micro motor. Detailed Implementation

[0046] Example 1

[0047] like Figure 1 , 2 The horizontal well coiled tubing energy enhancement and uniform unblocking production enhancement device shown in Figure 3 includes a propulsion assembly 1 installed at the wellhead of the horizontal well, a sealing assembly 2 connected to the propulsion assembly 1, and an unblocking assembly 3 connected to the sealing assembly 2. The propulsion assembly 1 includes a base 10 with a through hole 100 at the center, four clamping seats 11 that are slidably engaged on the base 10 and located around the through hole 100, four electric push rods 12 installed on the base 10 and fixedly connected to each clamping seat 11 in a one-to-one correspondence, four propulsion rollers 13 that are installed in each clamping seat 11 in a one-to-one correspondence, and four first micro motors 14 installed in each clamping seat 11 and providing power to each propulsion roller 13.

[0048] like Figure 1 , 4 As shown in Figures 6 and 8, the sealing assembly 2 includes a connecting hose 20 that penetrates through the through hole 100 and extends into the horizontal well, two sealing discs 21 fixedly connected to the ends of the connecting hose 20, rubber sealing bladders 22 respectively disposed around the two sealing discs 21, and expansion assemblies 23 respectively disposed on the two sealing discs 21 and used to support the rubber sealing bladders 22; one sealing disc 21 is fixedly connected to the end of the connecting hose 20, and the other sealing disc 21 is fixedly connected to the sealing disc 21 near the connecting hose 20 by eight tie rods 210; the sealing disc 21 is hollow inside and has a first retaining sleeve 211 and a second retaining sleeve 212 arranged sequentially inside; the expansion assembly 23 is a commercially available air pump;

[0049] like Figure 1, 4 As shown, the unblocking assembly 3 includes 8 mounting rods 30 disposed between the two sealing discs 21 and corresponding to each tie rod 210, 8 sets of high-pressure nozzles 31 movably hinged on the mounting rods 30, an unblocking pipe 32 disposed inside the connecting hose 20 and connected to each high-pressure nozzle 31 through a capillary tube, and a high-pressure pump 33 disposed outside the horizontal well and connected to the unblocking pipe 32. Each set of high-pressure nozzles 31 is provided with 5 nozzles.

[0050] Example 2

[0051] This embodiment describes a method for enhancing the uniform unblocking and increasing production of horizontal well coiled tubing using the apparatus of Embodiment 1, including the following steps:

[0052] S1. Connect the electric push rod 12, the first micro motor 14, the expansion assembly 23 and the high-pressure pump 33 to an external power source respectively;

[0053] S2. Fix the base 10 at the wellhead of the horizontal well, and make the through hole 100 on the base 10 face the wellhead of the horizontal well; turn on the electric push rod 12, and after the electric push rod 12 retracts, it drives each clamping seat 11 to slide on the base 10 and move away from each other.

[0054] S3. Insert the plugging component 2 and the unplugging component 3 into the horizontal wellbore through the through hole 100; turn on the electric push rod 12, so that the electric push rod 12 extends and pulls each clamping seat 11 closer to each other, and makes each push roller 13 abut against the outer wall of the connecting hose 20; then turn on each of the first micro motors 14, and use each of the first micro motors 14 to drive each push roller 13 to rotate, and finally make the plugging component 2 and the unplugging component 3 enter the predetermined position inside the horizontal wellbore;

[0055] S4. Open the two expansion components 23 to expand the rubber sealing bladders 22 on the two sealing discs 21, thereby achieving a seal between the two sealing discs 21 and the inner wall of the well.

[0056] S5. Turn on the high-pressure pump 33 and use the high-pressure pump 33 to inject the external unblocking fluid into each high-pressure nozzle 31 through the unblocking pipe 32. The unblocking fluid can be sprayed at high pressure to unblock the blocked holes inside the horizontal well. The unblocking fluid is commercially available acid unblocking fluid DFSJ-W1.

[0057] Example 3

[0058] like Figure 1 , 2The horizontal well coiled tubing energy enhancement and uniform unblocking production enhancement device shown in Figure 3 includes a propulsion assembly 1 installed at the wellhead of the horizontal well, a sealing assembly 2 connected to the propulsion assembly 1, and an unblocking assembly 3 connected to the sealing assembly 2. The propulsion assembly 1 includes a base 10 with a through hole 100 at the center, four clamping seats 11 that are slidably engaged on the base 10 and located around the through hole 100, four electric push rods 12 installed on the base 10 and fixedly connected to each clamping seat 11 in a one-to-one correspondence, four propulsion rollers 13 that are installed in each clamping seat 11 in a one-to-one correspondence, and four first micro motors 14 installed in each clamping seat 11 and providing power to each propulsion roller 13.

[0059] like Figure 1 , 4 As shown in Figures 5, 6, and 8, the sealing assembly 2 includes a connecting hose 20 that penetrates through the through hole 100 and extends into the horizontal well, two sealing discs 21 fixedly connected to the ends of the connecting hose 20, rubber sealing bladders 22 respectively disposed around the two sealing discs 21, and expansion assemblies 23 respectively disposed on the two sealing discs 21 for supporting the rubber sealing bladders 22; one sealing disc 21 is fixedly connected to the end of the connecting hose 20, and the other sealing disc 21 is fixedly connected to the sealing disc 21 near the connecting hose 20 by eight tie rods 210; the sealing disc 21 is hollow inside and has a first clip arranged sequentially inside. The first sleeve 211 and the second ferrule 212 are included; the expansion assembly 23 includes several expansion rods 230 that are rotatably engaged with the circumference of the sealing disc 21, an arc-shaped tile 231 that is movably hinged to the end of each expansion rod 230 and abuts against the inner wall of the rubber sealing bladder 22, a first gear ring 232 disposed inside the sealing disc 21 and located outside the first ferrule 211, and a second micro motor 233 disposed inside the sealing disc 21 and providing power to the first gear ring 232; each expansion rod 230 is provided with a gear 2300 at the connection between it and the sealing disc 21, and each gear 2300 is meshed with the first gear ring 232 respectively;

[0060] like Figure 1 , 4 As shown in Figure 9, the unblocking assembly 3 includes eight mounting rods 30 positioned between the two sealing discs 21 and corresponding to each tie rod 210; eight sets of high-pressure nozzles 31 movably hinged to the mounting rods 30; an unblocking pipe 32 positioned inside the connecting hose 20 and connected to each high-pressure nozzle 31 via a capillary tube; and a high-pressure pump 33 positioned outside the horizontal well and connected to the unblocking pipe 32. Each set of high-pressure nozzles 31 has five nozzles. A rotating disk 34 is rotatably engaged on the sealing disc 21 away from the connecting hose 20. A rotating flexible shaft 340 is positioned inside the connecting hose 20, penetrating the two sealing discs 21 and connected to the rotating disk 34. Eight cleaving plates 341 are equidistantly distributed around the rotating disk 34. A power motor 342 is positioned outside the horizontal well and connected to the rotating flexible shaft 340.

[0061] Example 4

[0062] This embodiment describes a method for enhancing the uniform unblocking and increasing production of horizontal well coiled tubing using the apparatus of Embodiment 3, including the following steps:

[0063] S1. Connect the electric push rod 12, the first micro motor 14, the second micro motor 233, the power motor 342 and the high-pressure pump 33 to an external power source respectively.

[0064] S2. Fix the base 10 at the wellhead of the horizontal well, and make the through hole 100 on the base 10 face the wellhead of the horizontal well; turn on the electric push rod 12, and after the electric push rod 12 retracts, it drives each clamping seat 11 to slide on the base 10 and move away from each other.

[0065] S3. Insert the sealing component 2 and the unblocking component 3 into the horizontal well shaft through the through hole 100; turn on the electric push rod 12, so that the electric push rod 12 extends and pulls the clamping seats 11 closer to each other, and makes the push rollers 13 abut against the outer wall of the connecting hose 20; then turn on the first micro motors 14, and use the first micro motors 14 to drive the push rollers 13 to rotate, and finally make the sealing component 2 and the unblocking component 3 enter the predetermined position inside the horizontal well shaft; when the connecting hose 20 is inserted into the horizontal well shaft, turn on the power motor 342, and use the power motor 342 to drive the rotating flexible shaft 340 to rotate, and use the rotating disk 34 to drive the crushing plate 341 to rotate, to crush and clean the blockages such as ore accumulated inside the well shaft;

[0066] S4. Turn on the second micro motor 233 and use the second micro motor 233 to drive the first gear ring 232 to rotate, so that each gear 2300 rotates under the action of the first gear ring 232, and drives the expansion rod 230 to deflect at a certain angle, and finally uses the arc-shaped tile 231 to open the rubber sealing bag 22, so that a sealed space is formed between the two sealing discs 21 and the inner wall of the well.

[0067] S5. Turn on the high-pressure pump 33 and use the high-pressure pump 33 to inject the external unblocking fluid into each high-pressure nozzle 31 through the unblocking pipe 32. The unblocking fluid can be sprayed at high pressure to unblock the blocked holes inside the horizontal well. The unblocking fluid is commercially available acid unblocking fluid DFSJ-W1.

[0068] Example 5

[0069] like Figure 1 , 2The horizontal well coiled tubing energy enhancement and uniform unblocking production enhancement device shown in Figure 3 includes a propulsion assembly 1 installed at the wellhead of the horizontal well, a sealing assembly 2 connected to the propulsion assembly 1, and an unblocking assembly 3 connected to the sealing assembly 2. The propulsion assembly 1 includes a base 10 with a through hole 100 at the center, four clamping seats 11 that are slidably engaged on the base 10 and located around the through hole 100, four electric push rods 12 installed on the base 10 and fixedly connected to each clamping seat 11 in a one-to-one correspondence, four propulsion rollers 13 that are installed in each clamping seat 11 in a one-to-one correspondence, and four first micro motors 14 installed in each clamping seat 11 and providing power to each propulsion roller 13.

[0070] like Figure 1 , 4 As shown in Figures 5, 6, and 8, the sealing assembly 2 includes a connecting hose 20 that penetrates through the through hole 100 and extends into the horizontal well, two sealing discs 21 fixedly connected to the ends of the connecting hose 20, rubber sealing bladders 22 respectively disposed around the two sealing discs 21, and expansion assemblies 23 respectively disposed on the two sealing discs 21 for supporting the rubber sealing bladders 22; one sealing disc 21 is fixedly connected to the end of the connecting hose 20, and the other sealing disc 21 is fixedly connected to the sealing disc 21 near the connecting hose 20 by eight tie rods 210; the sealing disc 21 is hollow inside and has a first clip arranged sequentially inside. The first sleeve 211 and the second ferrule 212 are included; the expansion assembly 23 includes several expansion rods 230 that are rotatably engaged with the circumference of the sealing disc 21, an arc-shaped tile 231 that is movably hinged to the end of each expansion rod 230 and abuts against the inner wall of the rubber sealing bladder 22, a first gear ring 232 disposed inside the sealing disc 21 and located outside the first ferrule 211, and a second micro motor 233 disposed inside the sealing disc 21 and providing power to the first gear ring 232; each expansion rod 230 is provided with a gear 2300 at the connection between it and the sealing disc 21, and each gear 2300 is meshed with the first gear ring 232 respectively;

[0071] like Figure 1 , 4As shown in Figures 5, 7, and 8, the unblocking assembly 3 includes eight mounting rods 30 positioned between the two sealing discs 21 and corresponding to each tie rod 210; eight sets of high-pressure nozzles 31 movably hinged to the mounting rods 30; an unblocking pipe 32 located inside the connecting hose 20 and connected to each high-pressure nozzle 31 via a capillary tube; and a high-pressure pump 33 located outside the horizontal well and connected to the unblocking pipe 32. Each set of high-pressure nozzles 31 has five nozzles. Each high-pressure nozzle 31 is slidably engaged with the tie rod 210 at its corresponding position. An adjusting pressure plate 35 and a docking plate 36 are respectively provided on opposite sides of the two sealing discs 21. The adjusting pressure plate 35 and the corresponding position... The sealing disc 21 at the position is rotatably engaged. A second gear ring 350 is provided on one side of the adjusting pressure plate 35, penetrating the sealing disc 21. A third micro motor 37 is provided on the second sleeve 212 to provide power to the second gear ring 350. A limiting groove 351 is provided on the other side of the adjusting disc 35, which is slidably engaged with each mounting rod 30. A wedge-shaped slider 352 is provided inside the limiting groove 351, which abuts against each mounting rod 30. A docking hole 360 ​​is provided on the docking disc 36 at the corresponding position of each mounting rod 30. A return spring 361 is provided inside each docking hole 361. A ball head 300 is rotatably engaged at the connection between the mounting rod 30 and the wedge-shaped slider 352.

[0072] Example 6

[0073] This embodiment describes a method for enhancing the energy and uniform unblocking of coiled tubing in horizontal wells using the apparatus of Embodiment 5, including the following steps:

[0074] S1. Connect the electric push rod 12, the first micro motor 14, the second micro motor 233, the third micro motor 37 and the high-pressure pump 33 to an external power source respectively.

[0075] S2. Fix the base 10 at the wellhead of the horizontal well, and make the through hole 100 on the base 10 face the wellhead of the horizontal well; turn on the electric push rod 12, and after the electric push rod 12 retracts, it drives each clamping seat 11 to slide on the base 10 and move away from each other.

[0076] S3. Insert the plugging component 2 and the unplugging component 3 into the horizontal wellbore through the through hole 100; turn on the electric push rod 12, so that the electric push rod 12 extends and pulls each clamping seat 11 closer to each other, and makes each push roller 13 abut against the outer wall of the connecting hose 20; then turn on each of the first micro motors 14, and use each of the first micro motors 14 to drive each push roller 13 to rotate, and finally make the plugging component 2 and the unplugging component 3 enter the predetermined position inside the horizontal wellbore;

[0077] S4. Turn on the second micro motor 233 and use the second micro motor 233 to drive the first gear ring 232 to rotate, so that each gear 2300 rotates under the action of the first gear ring 232, and drives the expansion rod 230 to deflect at a certain angle, and finally uses the arc-shaped tile 231 to open the rubber sealing bag 22, so that a sealed space is formed between the two sealing discs 21 and the inner wall of the well.

[0078] S5. Turn on the high-pressure pump 33 and the third micro motor 37. Use the high-pressure pump 33 to inject the external unblocking fluid into each high-pressure nozzle 31 through the unblocking pipe 32. The unblocking fluid can be sprayed at high pressure to unblock the blocked holes inside the horizontal well. Use the third micro motor 37 to drive the adjusting pressure plate 35 to drive the second gear ring 350 to rotate, so that the adjusting pressure plate 35 rotates on the corresponding unblocking plate 21. Use the wedge slider 352 on the adjusting pressure plate 35 to push each mounting rod 30 to move back and forth in the docking hole 360 ​​on the docking plate 36, so that the high-pressure nozzle 31 on each mounting rod 30 can swing on the pull rod 210. The unblocking fluid is commercially available acid unblocking fluid DFSJ-W1.

[0079] Example 7

[0080] like Figure 1 , 2 The coiled tubing power enhancement and uniform unblocking production enhancement device for horizontal wells shown in Figure 3 includes a propulsion assembly 1 installed at the wellhead of the horizontal well, a sealing assembly 2 connected to the propulsion assembly 1, and an unblocking assembly 3 connected to the sealing assembly 2. The propulsion assembly 1 includes a base 10 with a through hole 100 at its center, four clamping seats 11 that are slidably engaged on the base 10 and located around the through hole 100, four electric push rods 12 installed on the base 10 and fixedly connected to each clamping seat 11 in a one-to-one correspondence, four propulsion rollers 13 that are installed in each clamping seat 11 in a one-to-one correspondence, and four first micro motors 14 installed in each clamping seat 11 and providing power to each propulsion roller 13. Each propulsion roller 13 is provided with anti-slip stripes.

[0081] like Figure 1 , 4As shown in Figures 5, 6, 8, and 9, the sealing assembly 2 includes a connecting hose 20 extending into the horizontal well through the through hole 100, two sealing discs 21 fixedly connected to the ends of the connecting hose 20, rubber sealing bladders 22 respectively disposed around the two sealing discs 21, and expansion assemblies 23 respectively disposed on the two sealing discs 21 for supporting the rubber sealing bladders 22; one sealing disc 21 is fixedly connected to the end of the connecting hose 20, and the other sealing disc 21 is fixedly connected to the sealing disc 21 near the connecting hose 20 by eight tie rods 210; the sealing disc 21 is hollow inside and has a first retaining sleeve 211 and a second retaining sleeve 212 arranged sequentially inside; the expansion assembly 23 includes Several expansion rods 230 are rotatably engaged with the circumference of the sealing disc 21; arc-shaped tiles 231 are movably hinged to the ends of each expansion rod 230 and abut against the inner wall of the rubber sealing bladder 22; a first gear ring 232 is disposed inside the sealing disc 21 and located outside the first sleeve 211; and a second micro motor 233 is disposed inside the sealing disc 21 and provides power to the first gear ring 232; each expansion rod 230 is provided with a gear 2300 at the connection between it and the sealing disc 21, and each gear 2300 is meshed with the first gear ring 232; a guide disc 24 is provided on the side of each of the two sealing discs 21 that is far apart, and six guide wheels 240 are equidistantly distributed around the circumference of the guide disc 24;

[0082] like Figure 1 , 4As shown in Figures 5, 7, 8, and 9, the unblocking component 3 includes eight mounting rods 30 positioned between two sealing discs 21 and corresponding to each tie rod 210; eight sets of high-pressure nozzles 31 movably hinged to the mounting rods 30; an unblocking pipe 32 positioned inside the connecting hose 20 and connected to each high-pressure nozzle 31 via a capillary tube; and a high-pressure pump 33 positioned outside the horizontal well and connected to the unblocking pipe 32. Each set of high-pressure nozzles 31 has five nozzles. A rotating disk 34 is rotatably engaged on the sealing disc 21 furthest from the connecting hose 20. A rotating flexible shaft 340 is positioned inside the connecting hose 20, penetrating the two sealing discs 21 and connected to the rotating disk 34. Eight cleaving plates 341 are evenly distributed around the rotating disk 34. Each cleaving plate 341 has teeth 3410, and auxiliary cutting strips 3411 are provided on both sides of each cleaving plate 341. The rotating flexible shaft 340 is covered with a corrosion-resistant and wear-resistant sleeve. The unit is equipped with a power motor 342 connected to a rotating flexible shaft 340; each high-pressure nozzle 31 is slidably engaged with a pull rod 210 at its alignment position; an adjusting pressure plate 35 and a docking plate 36 are respectively provided on opposite sides of the two sealing discs 21; the adjusting pressure plate 35 is rotatably engaged with the sealing disc 21 at its corresponding position; a second gear ring 350 penetrating the sealing disc 21 is provided on one side of the adjusting pressure plate 35; a third micro motor 37 providing power to the second gear ring 350 is provided on the second sleeve 212; a limiting groove 351 slidably engaged with each mounting rod 30 is provided on the other side of the adjusting plate 35; a wedge-shaped slider 352 abutting against each mounting rod 30 is provided inside the limiting groove 351; a ball head 300 is rotatably engaged at the connection between the mounting rod 30 and the wedge-shaped slider 352; a docking hole 360 ​​is provided on the docking plate 36 at the corresponding position of each mounting rod 30; a return spring 361 is provided inside each docking hole 360.

[0083] Example 8

[0084] This embodiment describes a method for enhancing the uniform unblocking and increasing production of horizontal well coiled tubing using the apparatus of Embodiment 7, including the following steps:

[0085] S1. Connect the electric push rod 12, the first micro motor 14, the second micro motor 233, the suction pump 26, the monitoring host, the power motor 342, the third micro motor 37 and the high-pressure pump 33 to the external power supply respectively.

[0086] S2. Fix the base 10 at the wellhead of the horizontal well, and make the through hole 100 on the base 10 face the wellhead of the horizontal well; turn on the electric push rod 12, and after the electric push rod 12 retracts, it drives each clamping seat 11 to slide on the base 10 and move away from each other.

[0087] S3. Insert the sealing component 2 and the unblocking component 3 into the horizontal well shaft through the through hole 100; turn on the electric push rod 12, so that the electric push rod 12 extends and pulls the clamping seats 11 closer to each other, and makes the pushing rollers 13 abut against the outer wall of the connecting hose 20; then turn on the first micro motors 14, and use the first micro motors 14 to drive the pushing rollers 13 to rotate, and finally make the sealing component 2 and the unblocking component 3 enter the predetermined position inside the horizontal well shaft; when the sealing component 2 and the unblocking component 3 enter the horizontal well shaft, the guide wheel 240 on the guide plate 24 rubs and rolls with the well shaft; when the connecting hose 20 extends into the horizontal well shaft, turn on the power motor 342, and use the power motor 342 to drive the rotating flexible shaft 340 to rotate, and use the rotating plate 34 to drive the crushing plate 341 to rotate, to crush and clean the blockages such as ore accumulated inside the well shaft;

[0088] S4. Turn on the second micro motor 233 and use the second micro motor 233 to drive the first gear ring 232 to rotate, so that each gear 2300 rotates under the action of the first gear ring 232, and drives the expansion rod 230 to deflect at a certain angle, and finally uses the arc-shaped tile 231 to open the rubber sealing bag 22, so that a sealed space is formed between the two sealing discs 21 and the inner wall of the well.

[0089] S5. Turn on the high-pressure pump 33 and the third micro motor 37. Use the high-pressure pump 33 to inject the external unblocking fluid into each high-pressure nozzle 31 through the unblocking pipe 32 to perform high-pressure injection of the unblocking fluid to unblock the blocked holes inside the horizontal wellbore. Use the third micro motor 37 to drive the adjusting pressure plate 35 to rotate the second gear ring 350, so that the adjusting pressure plate 35 rotates on the corresponding unblocking plate 21. Use the wedge slider 352 on the adjusting pressure plate 35 to push each mounting rod 30 to move back and forth in the docking hole 360 ​​on the docking plate 36, so that the high-pressure nozzle 31 on each mounting rod 30 can swing on the pull rod 210. The unblocking fluid is commercially available acid unblocking fluid DFSJ-W1. Use the pressure sensor to sense the pressure between the two sealing plates 21 and the wellbore. When the pressure exceeds the preset value, turn on the suction pump 26 and use the return pipe 25 to discharge the return fluid inside the wellbore.

[0090] It should be noted that the electric push rod 12, the first micro motor 14, the second micro motor 233, the suction pump 26, the monitoring host, the power motor 342, the third micro motor 37 and the high-pressure pump 33 used in this invention all adopt existing technologies and are not specifically limited here. Appropriate products can be selected according to actual needs.

Claims

1. A coiled tubing energy-enhancing, uniform unblocking, and production-enhancing device for horizontal wells, characterized in that, The system includes a propulsion assembly (1) installed at the wellhead of a horizontal well, a plugging assembly (2) connected to the propulsion assembly (1), and a de-plugging assembly (3) connected to the plugging assembly (2). The propulsion assembly (1) includes a base (10) with a through hole (100) at its center, several clamping seats (11) that are slidably engaged on the base (10) and located around the through hole (100), several electric push rods (12) installed on the base (10) and fixedly connected to each clamping seat (11) in a one-to-one correspondence, several propulsion rollers (13) that are installed in each clamping seat (11) in a one-to-one correspondence, and several first micro motors (14) installed in each clamping seat (11) and providing power to each propulsion roller (13). The plugging assembly (2) includes a connecting hose (20) that passes through the through hole (100) and extends into the horizontal well, two plugging discs (21) fixedly connected to the ends of the connecting hose (20), rubber plugging bladders (22) respectively disposed around the two plugging discs (21), and expansion assemblies (23) respectively disposed on the two plugging discs (21) and used to support the rubber plugging bladders (22); one plugging disc (21) is fixedly connected to the end of the connecting hose (20), and the other plugging disc (21) is fixedly connected to the plugging disc (21) near the connecting hose (20) by several pull rods (210); the plugging disc (21) is hollow inside and has a first ferrule (211) and a second ferrule (212) arranged in sequence inside. The unblocking assembly (3) includes several mounting rods (30) disposed between two sealing discs (21) and corresponding one-to-one with each tie rod (210), an array of high-pressure nozzles (31) movably hinged on the mounting rods (30), an unblocking pipe (32) disposed inside the connecting hose (20) and connected to each high-pressure nozzle (31) through a capillary tube, and a high-pressure pump (33) disposed outside the horizontal well and connected to the unblocking pipe (32). The expansion assembly (23) includes several expansion rods (230) rotatably engaged with the circumference of the sealing disc (21), an arc-shaped tile (231) movably hinged to the end of each expansion rod (230) and abutting against the inner wall of the rubber sealing bladder (22), a first gear ring (232) disposed inside the sealing disc (21) and located outside the first sleeve (211), and a second micro motor (233) disposed inside the sealing disc (21) and providing power to the first gear ring (232); each expansion rod (2300) is provided with a gear (2300) at the connection between it and the sealing disc (21), and each gear (2300) meshes with the first gear ring (232); Each of the high-pressure nozzles (31) is slidably engaged with the pull rod (210) at the corresponding position; an adjusting pressure plate (35) and a docking plate (36) are respectively provided on the opposite side of the two sealing discs (21); the adjusting pressure plate (35) is rotatably engaged with the sealing disc (21) at the corresponding position, a second toothed ring (350) is provided on one side of the adjusting pressure plate (35) through the sealing disc (21), a third micro motor (37) is provided on the second sleeve (212) to provide power to the second toothed ring (350), a limiting groove (351) is provided on the other side of the adjusting pressure plate (35) to slidably engage with each mounting rod (30), a wedge-shaped slider (352) is provided inside the limiting groove (351) to abut against each mounting rod (30); a docking hole (360) is provided on the docking plate (36) and at the corresponding position of each mounting rod (30), a return spring (361) is provided inside each docking hole (360).

2. The coiled tubing energy-enhancing, uniform unblocking, and production-enhancing device for horizontal wells according to claim 1, characterized in that, A rotating disk (34) is rotatably engaged on a sealing disk (21) away from the connecting hose (20). A rotating flexible shaft (340) is provided inside the connecting hose (20) that passes through the two sealing disks (21) and is connected to the rotating disk (34). Several breaking plates (341) are equidistantly distributed around the rotating disk (34). A power motor (342) connected to the rotating flexible shaft (340) is provided outside the horizontal well.

3. The coiled tubing energy-enhancing, uniform unblocking, and production-enhancing device for horizontal wells according to claim 2, characterized in that, Each of the aforementioned crushing plates (341) is provided with teeth (3410), and each of the crushing plates (341) is provided with auxiliary cutting strips (3411) on both sides.

4. The coiled tubing energy-enhancing, uniform unblocking, and production-enhancing device for horizontal wells according to claim 1, characterized in that, The mounting rod (30) is rotatably engaged with the wedge-shaped slider (352) at the connection point.

5. The coiled tubing energy-enhancing, uniform unblocking, and production-enhancing device for horizontal wells according to claim 1, characterized in that, Each of the two sealing discs (21) is provided with a guide disc (24) on the side that is far apart from each other, and the guide disc (24) has several guide wheels (240) distributed equidistantly around its circumference.

6. The coiled tubing energy-enhancing, uniform unblocking, and production-enhancing device for horizontal wells according to claim 2, characterized in that, The rotating flexible shaft (340) is fitted with a corrosion-resistant and wear-resistant sleeve.

7. A method for enhancing the energy and uniform unblocking of horizontal well coiled tubing using the apparatus of claim 1, comprising the following steps: S1. Connect the electric push rod (12), the first micro motor (14), the expansion assembly (23) and the high-pressure pump (33) to an external power source respectively; S2. Fix the base (10) at the wellhead of the horizontal well and make the through hole (100) on the base (10) face the wellhead of the horizontal well; turn on the electric push rod (12) so that the electric push rod (12) retracts and drives each clamping seat (11) to slide on the base (10) and move away from each other; S3. Insert the plugging assembly (2) and the unplugging assembly (3) into the horizontal wellbore through the through hole (100); turn on the electric push rod (12) to extend the electric push rod (12) and pull the clamping seats (11) closer to each other, and make the push rollers (13) abut against the outer wall of the connecting hose (20); then turn on the first micro motors (14) to drive the push rollers (13) to rotate, and finally make the plugging assembly (2) and the unplugging assembly (3) enter the predetermined position inside the horizontal wellbore. S4. Open the two expansion components (23) to expand the rubber sealing bladders (22) on the two sealing discs (21) to achieve a seal between the two sealing discs (21) and the inner wall of the well. S5. Turn on the high-pressure pump (33) and use the high-pressure pump (33) to inject the external unblocking fluid into each high-pressure nozzle (31) through the unblocking pipe (32) to perform high-pressure injection of unblocking fluid to unblock the blocked holes inside the horizontal well.

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