A horizontal well coiled tubing rotary jet oscillation plug-removing device and method

Abstract

The application discloses a horizontal well coiled tubing rotary jet oscillation blockage removing device and method, which comprises a high-pressure jet head, the high-pressure jet head is provided with a high-pressure water jet hole and is a hydraulic rotary jet head; the high-pressure water jet hole of the high-pressure jet head generates a rotating force when high-pressure water passes through; the device further comprises a rotating pipe, a centrifugal force variable-diameter blocking mechanism and a centrifugal force variable-diameter centralizing mechanism; the front end of the high-pressure jet head is connected with the tail end of the rotating pipe and is in communication, the rear end of the high-pressure jet head is connected with the central channel of the rotating disc of the centrifugal force variable-diameter blocking mechanism and is in communication; the high-pressure jet head drives the rotating pipe and the rotating disc to rotate simultaneously. The application can make the blockage removed by the high-pressure jet head play a blocking effect, prevent the blockage from entering the other side of the first limiting sliding groove to cause secondary blockage, ensure the blockage removing effect, and ensure that the rotating axis of the rotating disc, i.e. the position of the high-pressure jet head, is on the central axis of the horizontal well, so that a good centralizing effect can be achieved on the high-pressure jet head.

Description

Technical Field

[0001] This invention relates to the field of oil well unblocking technology, specifically to a horizontal well coiled tubing rotary jet oscillation unblocking device and method. Background Technology

[0002] In recent years, with the advancement of drilling technology, various complex well structures have emerged, which has also raised the requirements for unblocking technology. Conventional unblocking technology can no longer meet the requirements, such as mud pollution blockage in horizontal wells and organic-inorganic composite blockage in filter sand pipes. Conventional physical unblocking methods cannot restore the permeability of the near-wellbore zone and release the production capacity of oil wells, resulting in a number of wells failing to meet production standards or even being scrapped due to low production, causing serious waste of resources and economic losses.

[0003] Current unblocking tools mainly use high-pressure liquid impact and vibration to unblock the blockage through coiled tubing and nozzles. Traditional nozzles are mainly divided into fixed multi-hole nozzles and rotary nozzles. However, the number of fixed nozzles is limited, making it difficult to achieve full-section cleaning. The parameter design range of traditional internal vortex nozzles is limited, making them difficult to use effectively. Moreover, the straightening mechanism of traditional unblocking tubing is difficult to achieve a good fit with the horizontal well wall, resulting in limited straightening effect. The unblocked debris is also difficult to collect effectively and is prone to moving with the water flow, causing secondary blockage.

[0004] Publication No.: CN108843274A, Publication Date: 2018-11-20, discloses a hydraulic jetting self-rotating scraper drill bit and a process for unblocking carbon dioxide injection wells, solving the problems of slow speed, high cost, and complex operation of current methods for treating frozen blockages. The hydraulic jetting self-rotating scraper drill bit injects heated and pressurized fluid. The frozen blockage layer is broken and dissolved by the thermal melting effect of the injected fluid, the crushing effect of the scraper drill bit, and the impact effect of the injected fluid, achieving the purpose of unblocking and drilling open the frozen blockage section. Simultaneously, a circulation system promptly carries the broken frozen blockage debris out of the wellbore, ensuring continuous operation of the device. After a carbon dioxide injection well becomes frozen, this drill bit and process have the advantages of simple operation, low construction cost, and wide application range, providing a guarantee for the large-scale application of carbon dioxide enhanced oil recovery technology.

[0005] Publication (Announcement) No.: CN112240179B, Publication (Announcement) Date: 2021-05-04 This invention relates to a novel hydraulic jet de-clogging device, comprising a filter, a short pipe, a cylinder, a motor, a reciprocating motion mechanism, and a rotating disk. The filter and cylinder are fixedly connected to the upper and lower ends of the short pipe, respectively. The motor is fixedly installed inside the cylinder via a motor bracket. The power input end of the reciprocating motion mechanism is connected to the output shaft of the motor, and the power output end of the reciprocating motion mechanism is fixedly connected to the rotating disk. The construction process is simple, the construction cost is low, and the treatment depth is large. Simultaneously, by rotating and spraying emulsifier, the emulsifier jet impacts the scale on the inner wall of the casing in both radial and tangential directions, making the scale easier to remove and effectively improving the descaling effect.

[0006] Publication (Announcement) No.: CN111005693A, Publication (Announcement) Date: 2020-04-14 discloses a downhole vortex unclogging tool, comprising a vortex fluid, a flow fluid, a connecting body, and a bearing seat connected sequentially from top to bottom; a spiral groove is provided on the outer side of the main body of the vortex fluid; an eccentric reverse circulation flow hole is provided on the side wall of the flow fluid; a piston sleeve is provided on the outer side of the flow fluid, and a spring sleeve is connected to the lower end of the piston sleeve. The spring sleeve is locked to the connecting body by a safety pin, and a spring is installed inside the spring sleeve, with the spring clamping between the spring sleeve and the connecting body; a filter and a one-way valve are installed at the lower part of the flow fluid, and a rotating shaft is installed inside the bearing seat; a rotating nozzle is connected to the lower end of the rotating shaft, and multiple nozzles are provided on the rotating nozzle. This tool can be used for both forward and reverse circulation well cleaning, allowing for both forward and reverse circulation well cleaning operations in a single tubing run. The combination of forward and reverse circulation well cleaning can thoroughly clean the wellbore, and the tool itself is not easily clogged.

[0007] Publication (Announcement) No.: CN214836200U, Publication (Announcement) Date: 2021-11-23 discloses a cavitation water jet descaling, unclogging, and backflow nozzle. It includes an upper connector, body, centralizer, PTFE seal, spring retaining ring, sealing ring, spring, retractable cavitation nozzle, nozzle body, distributor, conversion connector, rotating shaft, high-pressure seal, deep groove ball bearing, and damper. The retractable cavitation nozzle is threaded to the nozzle body; the distributor is threaded inside the nozzle body; both ends of the conversion connector are connected to the nozzle body and the rotating shaft respectively; the front end of the rotating shaft is connected to the conversion connector, the middle part is connected to the damper, and the two ends of the largest shaft end are equipped with high-pressure seal and deep groove ball bearing; the damper is a hollow, stepped shaft-like object that mates with the rotating shaft. This backflow nozzle is suitable for wellheads in different environments and has good descaling and backflow effects.

[0008] Publication (Announcement) No.: CN101806203B, Publication (Announcement) Date: 2012-08-01 This invention relates to a high-pressure hydraulic rotary unblocking device. The device consists of a shaft-mounted elastic retaining ring, needle roller bearing, thrust ball bearing, and housing. A preload spring and a friction pair stationary ring are installed in the central hole at the lower end of the main shaft. A resistance block, resistance adjustment spring, and resistance adjustment bolt are located at the upper end of the main shaft. A central nozzle and peripheral nozzles are mounted at the front of the nozzle. This invention uses high-pressure water as the working medium. The peripheral nozzles are at a certain angle to the shaft. The jet emitted from the peripheral nozzles generates a certain recoil force, driving the nozzle to rotate and forming a rotating jet that impacts the blockage at the bottom of the well. The resistance adjustment bolt and the friction pair jointly limit the rotational speed of the nozzle. Utilizing end-face sealing and other technologies, it solves the problems of sand removal and unblocking in oil and gas wells. It has advantages such as complex structure, low rotational resistance, and long service life, leading to the widespread application of high-pressure hydraulic rotary unblocking technology in the field of sand removal and unblocking in oil and gas wells.

[0009] Publication (Announcement) No.: CN204140022U, Publication (Announcement) Date: 2015-02-04 discloses a self-rotating hydraulic oscillation unblocking tool for oil well casing or screen pipe, including a clamp and a nozzle. The clamp has an inner hole, and the upper part of the inner hole of the clamp has a pipe thread for connection with the oil tubing. An axially fixed and circumferentially rotating nozzle is installed in the lower part of the inner hole of the clamp. The nozzle is ellipsoidal and has a hollow liquid cavity inside, which is connected to the inner hole of the clamp. Multiple horizontal outflow holes perpendicular to the nozzle's axis are provided on the upper part of the nozzle, and all the horizontal outflow holes are evenly distributed circumferentially. A nozzle I is installed at each of the left and right ends of each horizontal outflow hole. A vertical outflow hole is provided at the bottom of the nozzle, and a nozzle II is installed at each of the upper and lower ends of the vertical outflow hole. Both the vertical and horizontal outflow holes are connected to the liquid cavity. The hydraulic unblocking effect is very good, and the structure is simple and easy to manufacture.

[0010] The technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are different from those of the present invention, or they are in different technical fields or application scenarios. The above-disclosed technical documents do not provide any technical inspiration for the more technical features, technical problems to be solved, and beneficial effects of the present invention. Summary of the Invention

[0011] To address the aforementioned deficiencies in existing technologies, the present invention aims to provide a rotary jetting oscillation unblocking device and method for horizontal well coiled tubing. Through the rotation of a rotating disc under centrifugal force, a first slider, a first adjusting block, and a second adjusting block form a ring larger than the diameter of the first limiting groove via a fixed shaft, which fits against the inner wall of the horizontal well. This effectively blocks blockages cleared by the high-pressure nozzle, preventing them from entering the other side of the first limiting groove and causing secondary blockage, thus ensuring effective unblocking. Simultaneously, it ensures that the rotation axis of the rotating disc, i.e., the position of the high-pressure nozzle, is on the central axis of the horizontal well, providing a good centering effect for the high-pressure nozzle.

[0012] To achieve the above objectives, the present invention adopts the following technical solution:

[0013] A horizontal well coiled tubing rotary jetting oscillation unblocking device includes a high-pressure nozzle, wherein the high-pressure nozzle has high-pressure water jet holes and is a hydraulic rotary nozzle; the high-pressure water jet holes of the high-pressure nozzle generate rotational force when high-pressure water passes through them;

[0014] It also includes a rotating tube and a centrifugal force variable diameter blocking mechanism;

[0015] The front port of the high-pressure nozzle is connected to and communicates with the end of the rotating tube, and the rear port of the high-pressure nozzle is connected to and communicates with the central channel of the rotating disk of the centrifugal force diameter-changing barrier mechanism; the rotation of the high-pressure nozzle drives the rotating tube and the rotating disk to rotate simultaneously.

[0016] Furthermore, it also includes a centrifugal force variable diameter straightening mechanism; the centrifugal force variable diameter straightening mechanism includes a fixed ring mechanism and a straightener mechanism; the front end of the fixed ring mechanism is in contact with the rear end of the straightener mechanism;

[0017] The fixed ring mechanism is fitted onto the rotating tube and can rotate with the rotating tube.

[0018] Furthermore, it also includes water supply pipes;

[0019] The end of the water supply pipe is fixedly connected to the front end of the rotating pipe via a waterproof sealed bearing.

[0020] Furthermore, the high-pressure nozzle has at least three sets of high-pressure water spray holes on its sidewall and front axle end face at an angle; the opening direction of the high-pressure water spray holes is not perpendicular to the tangential surface of the high-pressure nozzle in contact with the high-pressure water spray holes, and the axis of each set of high-pressure water spray holes has the same inclination angle as the tangential surface of the high-pressure nozzle.

[0021] Furthermore, the centrifugal force variable diameter blocking mechanism includes at least three sets of centrifugal variable diameter module units, and the multiple sets of centrifugal variable diameter module units are arranged in a ring matrix and fixed around the central channel of the rotating disk of the centrifugal force variable diameter blocking mechanism.

[0022] The centrifugal variable diameter module unit includes a first limiting slide groove, a first tension spring, a first slider, a first adjusting block, and a second adjusting block;

[0023] The first slider slides within the first limiting groove, the first tension spring is placed within the first limiting groove, and the inner end of the first tension spring is connected to the bottom of the first limiting groove, while the outer end of the first tension spring is connected to the first slider. Fixed clamps are provided on both sides of the outer end of the first slider, and the fixed clamps on both sides are respectively hinged to the first adjusting block and the second adjusting block.

[0024] The two adjacent centrifugal variable diameter module units are each hinged together by adjacent first and second adjustment blocks.

[0025] Furthermore, the outer end faces of the first slider, the first adjusting block, and the second adjusting block are all curved surfaces.

[0026] Furthermore, the fixed ring mechanism includes at least three sets of centrifugal drive module units, and the multiple sets of centrifugal drive module units are arranged in a ring matrix and fixed on the first fixed ring, which is fitted onto the rotating tube;

[0027] The centrifugal pushing module unit includes a second limiting slide, a second slider, a second tension spring, a third limiting slide, and a third slider;

[0028] The second slider slides within the second limiting groove, the second tension spring is placed within the second limiting groove, and the inner end of the second tension spring is connected to the bottom of the second limiting groove, while the outer end of the second tension spring is connected to the second slider.

[0029] The first fixing ring also has a third axial limiting groove, which corresponds to the second limiting groove, and the third slider slides in the third limiting groove;

[0030] The outer end of the second slider and the inner end of the third slider are simultaneously provided with matching inclined surfaces. The second slider pushes the third slider outward by centrifugal force, and the third slider moves axially, thereby pushing the centralizer mechanism to compress axially.

[0031] Furthermore, the third slider is provided with a limiting block to prevent it from dislodging from the third limiting groove.

[0032] Furthermore, the centralizer mechanism includes a centralizer fixed ring, a centralizer movable ring, and a spiral strip assembly;

[0033] The fixing ring of the stabilizer is fixedly sleeved on the outer side wall of the water supply pipe, and the movable ring of the stabilizer is movably sleeved on the outer side wall of the water supply pipe and in contact with the limiting block.

[0034] A spiral strip assembly is fixedly installed between the fixed ring and the movable ring of the centralizer.

[0035] Furthermore, the radius of the centering mechanism at its maximum position when stationary is equal to the radius of the rotating disk.

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] 1. Before operation, the top of the water supply pipe is placed outside the oil well, and the high-pressure nozzle is extended to the horizontal well where unblocking is required. At the same time, the centralizer mechanism and the rotating disk are in contact with the inner wall of the horizontal well, which can fix the water supply pipe and the high-pressure nozzle to a certain extent, so that the central axis of the water supply pipe and the high-pressure nozzle are roughly coincident with the central axis of the horizontal well. This can prevent the water supply pipe from bending at the contact point with the high-pressure nozzle, which would affect the flow between the water supply pipe and the high-pressure nozzle. At the same time, it can ensure that the high-pressure nozzle can spray evenly on the inner wall of the horizontal well, thus ensuring the stability of the spraying and vibration unblocking operation.

[0038] 2. During operation, water is supplied to the water supply pipe through the top of the water supply pipe. The water flows through the inner cavity of the water supply pipe to the high-pressure nozzle and is sprayed out through the high-pressure spray hole. At the same time, because the high-pressure spray hole is opened in an inclined direction, the high-pressure water flow directly impacts the blockage of the oil well formation. In addition to being subjected to a large pulsating impact pressure, the formation is also subjected to shear force. Thus, the blockage in the borehole is loosened instantly under the combined action of pulsating impact pressure and shear force, which can achieve a good unblocking effect. At the same time, the reaction force of the water flow drives the high-pressure nozzle to rotate. The high-pressure nozzle can perform rotating spraying, which can clean and unblock the inner wall of the horizontal well and the upper and lower boreholes.

[0039] Simultaneously, the rotation of the high-pressure nozzle drives the rotating tube and rotating disk to rotate, and the rotation of the rotating disk drives the first slider to rotate. Under the action of centrifugal force, the first slider moves away from the rotating disk, and the first tension spring is stretched. At the same time, the first slider drives the first adjusting block and the second adjusting block to move away from the first limiting groove. The first slider, the first adjusting block and the second adjusting block form a ring larger than the diameter of the first limiting groove through the fixed shaft and fit against the inner wall of the horizontal well. This can block the blockage cleaned by the high-pressure nozzle, prevent the blockage from entering the other side of the first limiting groove and causing secondary blockage, and ensure the unblocking effect. At the same time, it can also ensure that the rotation axis of the rotating disk, i.e. the position of the high-pressure nozzle, is on the central axis of the horizontal well, which can have a good straightening effect on the high-pressure nozzle.

[0040] Simultaneously, the rotating tube drives the fixed ring to rotate. Under the action of centrifugal force, the second slider moves along the inner wall of the second limiting groove in a direction away from the fixed ring. The second slider contacts the third slider. Through the inclined surface design of the second and third sliders, the third slider is driven to move along the third limiting groove in a direction away from the fixed ring, which has a pushing effect on the moving ring of the centralizer. Through the movement of the moving ring of the centralizer and the fixed ring of the centralizer, the spiral strip assembly is compressed. At this time, the spiral strip assembly is compressed, the diameter in the middle becomes larger and fits against the inner wall of the horizontal well. The spiral strip assembly has a fixing effect and a certain centralizing effect on the water supply pipe, preventing the water supply pipe from the centralizer fixed ring to the high-pressure nozzle from vibrating and bending, ensuring that the water supply pipe has a good water supply effect to the high-pressure nozzle, and ensuring the stability of the entire device.

[0041] 3. After the work is completed, the entire device can be removed by dragging the water supply pipe. When the rotating plate moves along the horizontal well, it can contact the inner wall of the horizontal well and scrape off the loose blockages on the inner wall of the horizontal well. At the same time, the movement of the water supply pipe and the rotating plate can move the cleaned and peeled blockages to the outside, preventing them from causing blockages again inside the horizontal well. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall structure of a horizontal well coiled tubing rotary jet oscillation unblocking device proposed in this invention;

[0043] Figure 2 This is a schematic diagram of the high-pressure nozzle structure of a horizontal well coiled tubing rotary jet oscillation unblocking device proposed in this invention;

[0044] Figure 3 This is a schematic diagram of the rotating disk of a horizontal well coiled tubing rotary jetting oscillation unblocking device proposed in this invention when the rotating disk is stationary.

[0045] Figure 4 This is a schematic diagram of the rotating disk of a horizontal well coiled tubing rotary jetting oscillation unblocking device proposed in this invention during its rotation.

[0046] Figure 5 This is a schematic diagram of the fixed ring mechanism of a horizontal well coiled tubing rotary jet oscillation unblocking device proposed in this invention;

[0047] Figure 6 This is a schematic diagram of the centralizer mechanism of a horizontal well coiled tubing rotary jet oscillation unblocking device proposed in this invention.

[0048] In the diagram: 1. Water supply pipe; 2. Rotating pipe; 3. High-pressure nozzle; 4. Rotating disc; 5. Fixed ring mechanism; 6. Centralizer mechanism; 31. High-pressure water jet hole; 41. First limiting groove; 42. First tension spring; 43. First slider; 44. First fixed clamp; 45. Fixed shaft; 46. First adjusting block; 47. Second adjusting block; 51. First fixed ring; 52. Second limiting groove; 53. Second slider; 54. Second tension spring; 55. Third limiting groove; 56. Third slider; 57. Limiting block; 61. Centralizer fixed ring; 62. Centralizer movable ring; 63. Spiral strip assembly. Detailed Implementation

[0049] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1:

[0051] Reference Figure 1-6 A horizontal well coiled tubing rotary jetting oscillation unblocking device includes a water supply pipe 1, a rotary pipe 2, a high-pressure nozzle 3, a centrifugal force diameter changing barrier mechanism, and a centrifugal force diameter changing centering mechanism. The centrifugal force diameter changing barrier mechanism includes a rotary disk 4, and the centrifugal force diameter changing centering mechanism includes a fixed ring mechanism 5 and a centering device 6. The end of the water supply pipe 1 is fixedly sleeved with the rotary pipe 2 through a waterproof sealing bearing, and the other end of the rotary pipe 2 is fixedly installed with the high-pressure nozzle 3. The inner cavity of the water supply pipe 1 is connected to the inner cavities of the rotary pipe 2 and the high-pressure nozzle 3, and the end of the high-pressure nozzle 3 is fixedly installed with the rotary disk 4. The side wall and the oblique angle of the end of the high-pressure nozzle 3 are also provided with high-pressure water jet holes 31. The surface side wall of the water supply pipe 1 is installed with the centering device 6, and the surface side wall of the rotary pipe 2 is fixedly sleeved with the fixed ring mechanism 5, and the front end of the fixed ring mechanism 5 and the rear end of the centering device 6 are close to each other.

[0052] like Figure 2 The opening direction of the high-pressure water spray hole 31 is not perpendicular to the tangential surface of the high-pressure nozzle 3 in contact with the high-pressure water spray hole 31, and the axis of each group of high-pressure water spray holes 31 has the same inclination angle with the tangential surface of the high-pressure nozzle 3; the technology of opening such high-pressure water spray holes in the high-pressure nozzle 3 is the prior art in this field and will not be described in detail.

[0053] like Figure 3A first limiting groove 41 is fixedly installed on the inner side of the rotating disk 4. The diameter of the first limiting groove 41 is slightly smaller than the diameter of the horizontal well. A first tension spring 42 is fixedly installed at the bottom of the inner side of the first limiting groove 41. A first slider 43 is fixedly installed at the top of the first tension spring 42. The bottom of the first slider 43 is movably sleeved on the inner wall of the first limiting groove 41 and matches the size of the inner wall of the first limiting groove 41. A first fixing plate 44 is fixedly installed on both sides of the first slider 43. The two symmetrical first fixing plates 44 are respectively connected to a first adjusting block 46 and a second adjusting block 47 through a fixing shaft 45 passing through the first fixing plate 44.

[0054] like Figure 3 The first adjusting block 46 and the second adjusting block 47 are respectively designed with grooves and protrusions in the close contact parts, and the first adjusting block 46 and the second adjusting block 47 are also connected by a fixed shaft 45;

[0055] like Figure 3 The tension force of the first tension spring 42 keeps the top of the first slider 43 in contact with the top of the first limiting groove 41 when the rotating disk 4 is stationary, and the top curvature of the first slider 43 matches the curvature of the rotating disk 4.

[0056] like Figure 5 The fixed ring mechanism 5 includes a first fixed ring 51, which is fixedly sleeved on the outer side wall of the rotating tube 2. A second limiting groove 52 is fixedly installed on the inner side of the first fixed ring 51. A second slider 53 matching the size of the inner side wall of the second limiting groove 52 is movably sleeved on the inner side wall of the second limiting groove 52. A second tension spring 54 is fixedly installed between the bottom of the second limiting groove 52 and the inner side of the first fixed ring 51. A third limiting groove 55 is opened on the shaft end face of the first fixed ring 51. A third slider 56 is movably sleeved on the inner side wall of the third limiting groove 55. A limiting block 57 is also fixedly installed on the outer side wall of the third slider 56.

[0057] like Figure 5 The top of the second slider 53 and the side of the third slider 56 which is close to the second slider 53 are both provided with matching bevels; the limiting block 57 is fixedly installed on the outer top of the limiting block 57 extending to the first fixing ring 51, and the limiting block 57 is also installed on the inner side wall of the third slider 56 located in the inner cavity of the first fixing ring 51. The size of the limiting block 57 is larger than the size of the third limiting groove 55.

[0058] like Figure 6The centralizer mechanism 6 includes a centralizer fixing ring 61, which is fixedly sleeved on the outer side wall of the water supply pipe 1. The centralizer mechanism 6 also includes a centralizer movable ring 62, which is movably sleeved on the outer side wall of the water supply pipe 1 and contacts the limiting block 57. A spiral strip assembly 63 is fixedly installed between the centralizer fixing ring 61 and the centralizer movable ring 62. The spiral strip assembly 63 is constructed of a tough material with good elasticity, wear resistance, and corrosion resistance. When the centralizer mechanism 6 is stationary, its maximum radius is equal to the radius of the rotating disk 4.

[0059] In this invention, before operation, the top end of the water supply pipe 1 is placed outside the oil well, and the high-pressure nozzle 3 is extended to the horizontal well where unblocking is required. At the same time, the centralizer mechanism 6 and the rotating disk 4 are in contact with the inner wall of the horizontal well, which can fix the water supply pipe 1 and the high-pressure nozzle 3 to a certain extent, so that the central axis of the water supply pipe 1 and the high-pressure nozzle 3 is roughly coincident with the central axis of the horizontal well. This can ensure that the bending of the contact point between the water supply pipe 1 and the high-pressure nozzle 3 will not affect the flow between the water supply pipe 1 and the high-pressure nozzle 3, and at the same time, it can ensure that the high-pressure nozzle 3 sprays evenly on the inner wall of the horizontal well, thus ensuring the stability of the spraying and vibration unblocking operation.

[0060] During operation, water is supplied to the water supply pipe 1 through the top of the water supply pipe 1. The water flows through the inner cavity of the water supply pipe 1 to the high-pressure nozzle 3 and is sprayed out through the high-pressure water jet hole 31. At the same time, since the high-pressure water jet hole 31 is opened in an inclined direction, the high-pressure water flow directly impacts the blockage of the oil well formation. In addition to being subjected to a large pulsating impact pressure, the formation is also subjected to shear force. Thus, the blockage in the borehole is loosened instantly under the combined action of pulsating impact pressure and shear force, which can achieve a good unblocking effect. At the same time, the reaction force of the water flow drives the high-pressure nozzle 3 to rotate. The high-pressure nozzle 3 can perform rotating spraying, which can clean and unblock the inner wall of the horizontal well and the upper and lower boreholes.

[0061] Simultaneously, the high-pressure nozzle 3 rotates, driving the rotating tube 2 and the rotating disk 4 to rotate. The rotating disk 4 rotates, driving the first slider 43 to rotate. Under the action of centrifugal force, the first slider 43 moves away from the rotating disk 4, and the first tension spring 42 is stretched. At the same time, the first slider 43 drives the first adjusting block 46 and the second adjusting block 47 to move away from the first limiting groove 41. The first slider 43, the first adjusting block 46 and the second adjusting block 47 form a ring larger than the diameter of the first limiting groove 41 through the fixed shaft 45 and fit against the inner wall of the horizontal well. This can block the blockage cleared by the high-pressure nozzle 3, preventing the blockage from entering the other side of the first limiting groove 41 and causing secondary blockage, thus ensuring the unblocking effect. At the same time, it can also ensure that the rotation axis of the rotating disk 4, i.e. the position of the high-pressure nozzle 3, is on the central axis of the horizontal well, which can have a good straightening effect on the high-pressure nozzle 3.

[0062] Simultaneously, the rotating tube 2 rotates, causing the first fixed ring 51 to rotate. Under the action of centrifugal force, the second slider 53 moves along the inner wall of the second limiting groove 52 in a direction away from the first fixed ring 51. The second slider 53 contacts the third slider 56. Through the inclined surface design of the second slider 53 and the third slider 56, the third slider 56 is driven to move along the third limiting groove 55 in a direction away from the first fixed ring 51, which has a pushing effect on the centralizer movable ring 62. Through the movement of the centralizer movable ring 62 and the fixed centralizer fixed ring 61, the spiral strip group 63 is compressed. At this time, the spiral strip group 63 is compressed, the diameter in the middle becomes larger and fits against the inner wall of the horizontal well. The spiral strip group 63 has a fixing effect and a certain centralizing effect on the water supply pipe 1, preventing the water supply pipe 1 from the centralizer fixed ring 61 to the high-pressure nozzle 3 from vibrating and bending, ensuring that the water supply pipe 1 has a good water supply effect to the high-pressure nozzle 3, and ensuring the stability of the entire device.

[0063] After the work is completed, the entire device is removed by dragging the water supply pipe 1. When the rotating disk 4 moves along the horizontal well, it can contact the inner wall of the horizontal well and scrape off the loose blockages on the inner wall of the horizontal well. At the same time, the movement of the water supply pipe 1 and the rotating disk 4 can move the cleaned and peeled blockages to the outside, preventing them from causing blockages again inside the horizontal well.

[0064] Example 2:

[0065] Please see Figures 1 to 6 The present invention provides a technical solution:

[0066] A horizontal well coiled tubing rotary jetting oscillation unblocking device includes a high-pressure nozzle, wherein the high-pressure nozzle has high-pressure water jet holes and is a hydraulic rotary nozzle; the high-pressure water jet holes of the high-pressure nozzle generate rotational force when high-pressure water passes through them;

[0067] It also includes a rotating tube and a centrifugal force variable diameter blocking mechanism;

[0068] The front port of the high-pressure nozzle is connected to and communicates with the end of the rotating tube, and the rear port of the high-pressure nozzle is connected to and communicates with the central channel of the rotating disk of the centrifugal force diameter-changing barrier mechanism; the rotation of the high-pressure nozzle drives the rotating tube and the rotating disk to rotate simultaneously.

[0069] Furthermore, the centrifugal force variable diameter blocking mechanism includes at least three sets of centrifugal variable diameter module units, and the multiple sets of centrifugal variable diameter module units are arranged in a ring matrix and fixed around the central channel of the rotating disk of the centrifugal force variable diameter blocking mechanism.

[0070] The centrifugal variable diameter module unit includes a first limiting slide groove, a first tension spring, a first slider, a first adjusting block, and a second adjusting block;

[0071] The first slider slides within the first limiting groove, the first tension spring is placed within the first limiting groove, and the inner end of the first tension spring is connected to the bottom of the first limiting groove, while the outer end of the first tension spring is connected to the first slider. Fixed clamps are provided on both sides of the outer end of the first slider, and the fixed clamps on both sides are respectively hinged to the first adjusting block and the second adjusting block.

[0072] The two adjacent centrifugal variable diameter module units are each hinged together by adjacent first and second adjustment blocks.

[0073] Furthermore, the outer end faces of the first slider, the first adjusting block, and the second adjusting block are all curved surfaces.

[0074] Example 3:

[0075] Please see Figures 1 to 6 The present invention provides a technical solution:

[0076] A horizontal well coiled tubing rotary jetting oscillation unblocking device includes a high-pressure nozzle, wherein the high-pressure nozzle has high-pressure water jet holes and is a hydraulic rotary nozzle; the high-pressure water jet holes of the high-pressure nozzle generate rotational force when high-pressure water passes through them;

[0077] It also includes a rotating tube; the front port of the high-pressure nozzle is connected to and communicates with the end of the rotating tube; the rotation of the high-pressure nozzle drives the rotating tube to rotate.

[0078] Furthermore, it also includes a centrifugal force variable diameter straightening mechanism; the centrifugal force variable diameter straightening mechanism includes a fixed ring mechanism and a straightener mechanism; the front end of the fixed ring mechanism is in contact with the rear end of the straightener mechanism;

[0079] The fixed ring mechanism is fitted onto the rotating tube and can rotate with the rotating tube.

[0080] Furthermore, it also includes a water supply pipe; the end of the water supply pipe is fixedly connected to the front end of the rotating pipe via a waterproof sealed bearing.

[0081] Furthermore, the fixed ring mechanism includes at least three sets of centrifugal drive module units, and the multiple sets of centrifugal drive module units are arranged in a ring matrix and fixed on the first fixed ring, which is fitted onto the rotating tube;

[0082] The centrifugal pushing module unit includes a second limiting slide, a second slider, a second tension spring, a third limiting slide, and a third slider;

[0083] The second slider slides within the second limiting groove, the second tension spring is placed within the second limiting groove, and the inner end of the second tension spring is connected to the bottom of the second limiting groove, while the outer end of the second tension spring is connected to the second slider.

[0084] The first fixing ring also has a third axial limiting groove, which corresponds to the second limiting groove, and the third slider slides in the third limiting groove;

[0085] The outer end of the second slider and the inner end of the third slider are simultaneously provided with matching inclined surfaces. The second slider pushes the third slider outward by centrifugal force, and the third slider moves axially, thereby pushing the centralizer mechanism to compress axially.

[0086] Furthermore, the third slider is provided with a limiting block to prevent it from dislodging from the third limiting groove.

[0087] Furthermore, the centralizer mechanism includes a centralizer fixed ring, a centralizer movable ring, and a spiral strip assembly;

[0088] The fixing ring of the stabilizer is fixedly sleeved on the outer side wall of the water supply pipe, and the movable ring of the stabilizer is movably sleeved on the outer side wall of the water supply pipe and in contact with the limiting block.

[0089] A spiral strip assembly is fixedly installed between the fixed ring and the movable ring of the centralizer.

[0090] Although all the above embodiments use Figures 1 to 6 However, those skilled in the art will clearly understand that separate drawings are not necessary; simply removing missing components or structural features from the drawings is sufficient. This is clear to those skilled in the art. Of course, embodiments with more components are merely optimal embodiments, while embodiments with fewer components are basic embodiments, but both can achieve the basic inventive objective. Therefore, all these modified embodiments are within the protection scope of this invention.

[0091] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field and will not be elaborated upon further. Examples include welding and threaded connections.

[0092] In this invention, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0093] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0094] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0095] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A horizontal well coiled tubing rotary jetting oscillation unblocking device, comprising a high-pressure nozzle, wherein the high-pressure nozzle has high-pressure water jet holes and is a hydraulic rotary nozzle; the high-pressure water jet holes of the high-pressure nozzle generate rotational force when high-pressure water passes through them; Its features are, It also includes a rotating tube and a centrifugal force variable diameter blocking mechanism; The front port of the high-pressure nozzle is connected to and communicates with the end of the rotating tube, and the rear port of the high-pressure nozzle is connected to and communicates with the central channel of the rotating disk of the centrifugal force diameter-changing barrier mechanism; the rotation of the high-pressure nozzle drives the rotating tube and the rotating disk to rotate simultaneously. It also includes a centrifugal force diameter-changing and straightening mechanism; the centrifugal force diameter-changing and straightening mechanism includes a fixed ring mechanism and a straightener mechanism; the front end of the fixed ring mechanism is in contact with the rear end of the straightener mechanism; the fixed ring mechanism is fitted on the rotating tube and can rotate with the rotating tube. The centrifugal force variable diameter blocking mechanism includes at least three sets of centrifugal variable diameter module units, and the multiple sets of centrifugal variable diameter module units are arranged in a ring matrix and fixed around the central channel of the rotating disk of the centrifugal force variable diameter blocking mechanism. The centrifugal variable diameter module unit includes a first limiting slide groove, a first tension spring, a first slider, a first adjusting block, and a second adjusting block; The first slider slides within the first limiting groove, the first tension spring is placed within the first limiting groove, and the inner end of the first tension spring is connected to the bottom of the first limiting groove, while the outer end of the first tension spring is connected to the first slider; fixed clamps are provided on both sides of the outer end of the first slider, and the fixed clamps on both sides are respectively hinged to the first adjusting block and the second adjusting block; Each pair of adjacent centrifugal variable diameter module units is hinged together by adjacent first and second adjusting blocks; The fixed ring mechanism includes a first fixed ring and at least three sets of centrifugal push module units. The multiple sets of centrifugal push module units are arranged in a ring matrix and fixed on the first fixed ring. The first fixed ring is fitted onto the rotating tube. The centrifugal pushing module unit includes a second limiting slide, a second slider, a second tension spring, a third limiting slide, and a third slider; The second slider slides within the second limiting groove, the second tension spring is placed within the second limiting groove, and the inner end of the second tension spring is connected to the bottom of the second limiting groove, while the outer end of the second tension spring is connected to the second slider. The first fixing ring also has a third axial limiting groove, which corresponds to the second limiting groove, and the third slider slides in the third limiting groove; The outer end of the second slider and the inner end of the third slider are simultaneously provided with matching inclined surfaces. The second slider pushes the third slider outward by centrifugal force, and the third slider moves axially, thereby pushing the centralizer mechanism to compress axially.

2. The horizontal well coiled tubing rotary jet oscillation unblocking device according to claim 1, characterized in that, It also includes water supply pipes; The end of the water supply pipe is fixedly connected to the front end of the rotating pipe via a waterproof sealed bearing.

3. The horizontal well coiled tubing rotary jet oscillation unblocking device according to claim 2, characterized in that, The high-pressure nozzle has at least three sets of high-pressure water spray holes on its sidewall and front axle end face at an angle; the opening direction of the high-pressure water spray holes is not perpendicular to the tangential surface of the high-pressure nozzle in contact with the high-pressure water spray holes, and the axis of each set of high-pressure water spray holes has the same inclination angle as the tangential surface of the high-pressure nozzle.

4. The horizontal well coiled tubing rotary jet oscillation unblocking device according to claim 3, characterized in that, The outer end faces of the first slider, the first adjusting block, and the second adjusting block are all curved surfaces.

5. A horizontal well coiled tubing rotary jetting oscillation unblocking device according to claim 4, characterized in that, The third slider is provided with a limiting block to prevent it from coming out of the third limiting groove.

6. A horizontal well coiled tubing rotary jetting oscillation unblocking device according to claim 5, characterized in that, The centralizer mechanism includes a centralizer fixed ring, a centralizer movable ring, and a spiral strip assembly; The fixing ring of the stabilizer is fixedly sleeved on the outer side wall of the water supply pipe, and the movable ring of the stabilizer is movably sleeved on the outer side wall of the water supply pipe and in contact with the limiting block. A spiral strip assembly is fixedly installed between the fixed ring and the movable ring of the centralizer.

7. A horizontal well coiled tubing rotary jetting oscillation unblocking device according to claim 6, characterized in that, When the centralizer mechanism is at rest, its maximum radius is equal to the radius of the rotating disk.

8. A method of using the horizontal well coiled tubing rotary jetting oscillation unblocking device as described in claim 7, characterized in that, Includes the following steps: Water flows through the inner cavity of the water supply pipe to the high-pressure nozzle, and is ejected through the high-pressure spray hole. Since the high-pressure spray hole is opened at an angle, the high-pressure water flow directly impacts the blockage in the oil well formation. In addition to being subjected to a large pulsating impact pressure, the formation is also subjected to shear force. Thus, the blockage in the borehole is loosened instantly under the combined action of pulsating impact pressure and shear force, achieving a good unblocking effect. At the same time, the reaction force of the water flow drives the high-pressure nozzle to rotate, and the high-pressure nozzle rotates and sprays, which has a cleaning and unblocking effect on the inner wall of the horizontal well and the upper and lower boreholes. Simultaneously, the high-pressure nozzle rotates, causing the rotating pipe and rotating disk to rotate. The rotating disk rotates, causing the first slider to rotate. Under the action of centrifugal force, the first slider moves away from the rotating disk. The first tension spring is stretched. At the same time, the first slider drives the first adjusting block and the second adjusting block to move away from the first limiting groove. The first slider, the first adjusting block and the second adjusting block form a ring larger than the diameter of the first limiting groove through the fixed shaft and fit against the inner wall of the horizontal well. This makes the blockage cleared by the high-pressure nozzle have a blocking effect, preventing the blockage from entering the other side of the first limiting groove and causing secondary blockage, ensuring the unblocking effect. At the same time, it also ensures that the rotation axis of the rotating disk, i.e. the position of the high-pressure nozzle, is on the central axis of the horizontal well, which has a good straightening effect on the high-pressure nozzle. Simultaneously, the rotation of the rotating tube drives the first fixed ring to rotate. Under the action of centrifugal force, the second slider moves along the inner wall of the second limiting groove in a direction away from the fixed ring. The second slider contacts the third slider. Through the inclined surface design of the second and third sliders, the third slider is driven to move along the third limiting groove in a direction away from the fixed ring, which has a pushing effect on the moving ring of the centralizer. Through the movement of the moving ring of the centralizer and the fixed ring of the centralizer, the spiral strip assembly is compressed. At this time, the spiral strip assembly is compressed, the diameter in the middle becomes larger and fits against the inner wall of the horizontal well. The spiral strip assembly has a fixing effect and a certain centralizing effect on the water supply pipe, preventing the water supply pipe from the centralizer fixed ring to the high-pressure nozzle from vibrating and bending, ensuring that the water supply pipe has a good water supply effect to the high-pressure nozzle, and ensuring the stability of the entire device. After the work is completed, the entire device is removed by dragging the water supply pipe. When the rotating disc moves along the horizontal well, it contacts the inner wall of the horizontal well and scrapes off the loose blockages on the inner wall of the horizontal well. At the same time, the movement of the water supply pipe and the rotating disc moves the cleaned and peeled blockages to the outside, preventing them from causing blockages again inside the horizontal well.

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