Ball suspension type jet unblocking device

Abstract

The invention discloses a ball suspension type jet unblocking device which comprises an anchor unit, a rotating unit, a jet unblocking unit and a pressurizing unit, and the anchor unit is used for being anchored to the wall of a casing pipe; the rotating unit comprises a rotating head, a rotating sleeve and a plurality of hanging balls, the rotating head and the rotating sleeve are connected in a nested mode, an annular groove is formed between the rotating head and the rotating sleeve, and the hanging balls are arranged in the annular groove; the jet unblocking unit comprises a first inner cylinder, an upper joint and an outer shield; the supercharging unit comprises a central pipe and a supercharger, a first positioning protrusion is arranged on the inner wall of the central pipe, and a second positioning protrusion is arranged on the outer wall of the supercharger. The annular groove is formed between the rotating head and the rotating sleeve, the multiple hanging balls are arranged in the annular groove, the requirement for axial tensile resistance of the device is met, meanwhile, compared with a spherical surface structure in the prior art, the contact area is reduced through the hanging balls, the rotating sleeve and the spraying plug removal unit and the pressurizing unit below the rotating sleeve rotate at a high speed, and the spraying plug removal effect is improved. And therefore, the efficiency of spraying blockage removal is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of oil well equipment, and in particular relates to a ball-suspended jetting unblocking device. Background Art

[0002] Oil is mainly stored in the pores in the rock formation, forming an oil reservoir. During the oil production process, the oil production pipeline needs to be inserted into the oil reservoir to produce the oil stored in the oil reservoir. The area of ​​the oil reservoir close to the oil production pipeline is called the near-wellbore area. The oil in the non-near-wellbore area relies on osmosis to reach the oil production pipeline through the pores in the near-wellbore area.

[0003] In the process of oil and gas development, as the development of oil reservoirs deepens, in order to maintain a good seepage state, the seepage and pollution problems in the near-well area must be effectively solved. As the oil well production cycle is extended, oil reservoirs often encounter damage caused by operations during development, causing pollution and blockage around the wellbore, resulting in high injection pressure of water injection wells, which seriously affects the balance of injection and production; in addition, over-balanced drilling, when drilling into oil layers, drilling fluid and completion fluid cause early contamination of the oil layers, and even worse, a considerable number of oil wells have a large amount of drilling fluid leakage when drilling into oil layers, resulting in pore blockage, which restricts the stable production of oil wells.

[0004] In the process of unblocking oil and water wells, a hydraulic jet unblocking device is usually lowered into the target layer position underground, and the high-pressure water jet with chemicals from the nozzle is sprayed toward the well wall and the near-well rock formation and moves axially. The jet unblocking device is driven to rotate by a rotator to realize the rotational spraying of high-pressure water flow, thereby achieving the purpose of descaling and unblocking. However, the rotating shaft and the rotating sleeve of the rotator are connected by a spherical surface, and the rotation speed is low, so the unblocking efficiency is also low. Summary of the invention

[0005] In order to solve the technical problem that the rotating shaft and the rotating sleeve of the rotator of the prior art unblocking device are connected by a spherical surface, the rotation speed is low, and thus the unblocking efficiency is also low, the present application provides a ball-suspended jet unblocking device.

[0006] The present application provides a ball-suspended jetting unblocking device, comprising an anchor unit, a rotating unit, a jetting unblocking unit and a pressurizing unit, wherein:

[0007] One end of the anchor unit is connected to the rotating unit, and the other end is connected to the oil pipe, and is used to anchor on the casing wall when the oil pipe pressure rises to a preset pressure value;

[0008] The rotating unit comprises a rotating head, a rotating sleeve and a plurality of hanging balls, wherein the rotating head and the rotating sleeve are nested and connected and an annular groove is formed therebetween, and the plurality of hanging balls are arranged in the annular groove;

[0009] The two ends of the jet unblocking unit are respectively connected to the rotating unit and the supercharging unit, and the jet unblocking unit comprises a first inner tube, an upper joint and an outer shield, the upper joint is covered on the first inner tube, the outer shield is covered on the upper joint, the upper joint and the first inner tube are provided with a fluid channel, and the outer shield is provided with a jet hole, and the jet hole is connected with the fluid channel;

[0010] The boosting unit includes a central tube and a supercharger, the inner wall of the central tube is provided with a first positioning protrusion, the outer wall of the supercharger is provided with a second positioning protrusion, and the supercharger is placed in the central tube so that the second positioning protrusion fits with the first positioning protrusion to seal the central tube and achieve the purpose of boosting.

[0011] In some optional embodiments, the outer wall of the rotating head is provided with a first groove, the inner wall of the rotating head is provided with a placement hole connected to the first groove, and the placement hole allows the hanging ball to pass through; the rotating sleeve is provided with a second groove, and the first groove and the second groove are combined to form the annular groove;

[0012] The rotating unit further includes a top screw, which is used to be placed in the placement hole to block the placement hole after the suspension ball is placed in the annular groove.

[0013] In some optional embodiments, the injection holes are distributed spirally on the outer shroud, and an axis of the injection hole forms an acute angle with a radial direction of the outer shroud.

[0014] In some optional embodiments, the rotating unit further comprises a tubing coupling and a variable buckle joint, wherein the tubing coupling is respectively connected to the anchor unit and the rotating head, and the variable buckle joint is respectively connected to the rotating sleeve and the upper joint.

[0015] In some optional embodiments, the jet deplugging unit also includes a gasket, a second inner tube and a lower joint, the second inner tube is embedded in the upper joint and abuts against the first inner tube; the lower joint is connected to the upper joint, and the inner wall of the lower joint abuts against the end face of the second inner tube, and the end of the lower joint away from the upper joint is connected to the boosting unit; the gasket is arranged between the end face of the outer shield and the end face of the upper joint, and the gasket is arranged between the outer shield and the end face of the lower joint.

[0016] In some optional embodiments, the boosting unit further includes a first joint, a second joint, a shear ring and a sleeve, the first joint and the second joint are respectively connected to the two ends of the center tube, the first joint is connected to the lower joint, the shear ring and the sleeve are sleeved on the center tube, the shear ring is connected to the center tube via a shear pin, one end face of the sleeve abuts against the end face of the shear ring, and the other end face of the sleeve abuts against the end face of the second joint; the center tube is provided with a pressure relief hole, and the pressure relief hole is blocked by the sleeve.

[0017] In some optional embodiments, a first annulus is provided between the sliding sleeve and the outer wall of the central pipe, and a water-permeable hole connected to the first annulus is provided on the central pipe;

[0018] When the pressure of the central tube is able to shear the shear pin, the shear ring and the sliding sleeve slide upward and leak out of the pressure relief hole, so that the internal and external pressures of the central tube are balanced.

[0019] In some optional embodiments, the outer wall of the central tube is provided with a first limiting protrusion, the inner wall of the sliding sleeve is provided with a second limiting protrusion, and the shear ring and the sliding sleeve slide upward until the second limiting protrusion abuts against the first limiting protrusion.

[0020] In some optional embodiments, the boosting unit further includes a return spring, which is disposed on the center tube and located between the upper joint and the shear ring; the return spring is compressed and accumulates a rebound force during the upward sliding movement of the shear ring, and when the thrust driven by the flow pressure of the center tube is less than the rebound force, the rebound force causes the shear ring and the sleeve to slide downward, closing the pressure relief hole.

[0021] In some optional embodiments, the ball-suspended jetting unblocking device further includes a connecting short section, and two ends of the connecting short section are respectively connected to the lower joint and the first joint.

[0022] A ball-suspended jetting unblocking device provided according to one or more embodiments of the present application has the following technical effects:

[0023] The rotating head and the rotating sleeve are nested and connected with an annular groove formed therebetween, and a plurality of the hanging balls are arranged in the annular groove, which can not only meet the axial tensile resistance of the device, but also keep the rotating head and the hydraulic anchor unit stationary. At the same time, the form of the hanging balls reduces the contact area compared to the spherical surface structure in the prior art, so that the rotating sleeve and the jet unblocking unit and the booster unit below the rotating sleeve can rotate at a high speed, thereby improving the efficiency of the jet unblocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1A cross-sectional view of a ball-suspended jetting unblocking device according to one or more embodiments of the present application is shown;

[0025] Figure 2 A cross-sectional view showing an anchor unit of a ball-suspended jetting plugging removal device according to one or more embodiments of the present application;

[0026] Figure 3 A cross-sectional view showing a rotating unit of a ball-suspended jetting unblocking device according to one or more embodiments of the present application;

[0027] Figure 4 A perspective view showing a rotating unit of a ball-suspended jetting unblocking device according to one or more embodiments of the present application;

[0028] Figure 5 A cross-sectional view of a jetting unblocking unit of a ball-suspended jetting unblocking device according to one or more embodiments of the present application is shown;

[0029] Figure 6 A perspective view showing a jetting unblocking unit of a ball-suspended jetting unblocking device according to one or more embodiments of the present application;

[0030] Figure 7 A cross-sectional view of a pressurizing unit of a ball-suspended jetting deblocking device according to one or more embodiments of the present application is shown.

[0031] Description of reference numerals: 1-anchor unit, 101-anchor unit body, 102-anchor claw; 2-rotating unit, 201-oil pipe coupling, 202-rotating head, 2021-first groove, 2022-placing hole, 203-rotating sleeve, 2031-second groove, 204-variable buckle joint, 205-hanging ball, 206-top screw; 3-injection unblocking unit, 301-upper joint, 3011-slit, 302-gasket, 303-outer shield, 3031-injection hole, 304-first inner cylinder, 3041-flow channel hole, 305-lower joint , 3051-positioning step, 306-second inner tube; 4-connecting short section; 5-boosting unit, 501-first joint, 502-reset spring, 503-center tube, 5031-first positioning protrusion, 5032-water permeable hole, 5033-pressure relief hole, 5034-first limiting protrusion, 504-shear ring, 505-shear pin, 506-blocker, 507-sleeve, 5071-second limiting protrusion, 508-locking pin, 509-boosting device, 5091-second positioning protrusion, 510-second joint, 511-first annulus. DETAILED DESCRIPTION

[0032] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] Reference Figure 1-Figure 7 As shown, the embodiment of the present application provides a ball-suspended jet unblocking device, comprising an anchor unit 1, a rotating unit 2, a jet unblocking unit 3 and a booster unit 5, wherein:

[0034] One end of the anchor unit 1 is connected to the rotating unit 2, and the other end is connected to the oil pipe, which is used to anchor on the casing wall when the oil pipe pressure rises to a preset pressure value; the circumferential surface of the anchor unit body 101 is evenly distributed with anchor claws 102, and the anchor claws 102 are in the original state due to the action of the internal elastic member (the teeth of the anchor claws 102 are not higher than the anchor unit body 101), and the anchor claws 102 extend outwards under the action of the liquid pressure generated by the internal and external pressure difference through internal pressure holding, and the teeth of the anchor claws 102 are embedded in the casing wall, limiting the up and down movement of the tool, so as to realize the anchoring of the pipe string; after eliminating the internal and external pressure difference of the tool, the anchor claws 102 are reset under the elastic force of the internal spring between the baffle and the anchor claws 102, and the anchoring is released;

[0035] The rotating unit 2 includes a rotating head 202, a rotating sleeve 203 and a plurality of hanging balls 205. The rotating head 202 and the rotating sleeve 203 are both hollow cylinders. The rotating head 202 and the rotating sleeve 203 are nested and connected, and an annular groove is formed between the two. The plurality of hanging balls 205 are arranged in the annular groove. The plurality of hanging balls 205 are evenly distributed in the annular groove, which can better evenly share the axial tension between the rotating head 202 and the rotating sleeve 203. The width and depth of the annular groove are slightly larger than the diameter of the hanging balls 205. The hanging balls 205 can rotate freely in the annular groove and can connect the rotating head 202 and the rotating sleeve 203, so that there will be no large-scale axial relative movement between the rotating head 202 and the rotating sleeve 203.

[0036] The two ends of the jetting unblocking unit 3 are connected to the rotating unit 2 and the boosting unit 5 respectively. The jetting unblocking unit 3 comprises a first inner tube 304, an upper joint 301 and an outer shield 303. The upper joint 301 is covered with the first inner tube 304, and the outer shield 303 is covered with the upper joint 301. The upper joint 301 and the first inner tube 304 are provided with a fluid channel. The flow channel comprises a slit 3011 of the upper joint 301 and a flow channel hole 3041 of the upper inner casing 304. The outer shield 303 is provided with a jet hole 3031, and the jet hole 3031 is connected with the fluid channel. After the jetting fluid enters the oil pipe, it flows into the annulus between the first inner tube 304 and the upper joint 301 from the flow channel hole 3041 of the upper inner casing 304, and then flows into the jet hole 3031 through the slit 3011 of the upper joint 301, so as to jet unblock the perforations on the casing and the near-wellbore area.

[0037] The boosting unit 5 includes a central tube 503 and a supercharger 509. The inner wall of the central tube 503 is provided with a first positioning protrusion 5031, and the outer wall of the supercharger 509 is provided with a second positioning protrusion 5091. The supercharger 509 is placed in the central tube 503 so that the second positioning protrusion 5091 fits with the first positioning protrusion 5031 to seal the central tube 503 and achieve the purpose of boosting.

[0038] The ball-suspended jet unblocking device proposed in the embodiment of the present application is connected by nesting the rotating head 202 and the rotating sleeve 203 and forming an annular groove therebetween. A plurality of the suspension balls 205 are arranged in the annular groove, which can not only meet the axial tensile resistance of the device, but also keep the rotating head 202 and the hydraulic anchor unit 1 stationary. At the same time, the form of the suspension ball 205 reduces the contact area compared to the spherical surface structure in the prior art, so that the rotating sleeve 203 and the jet unblocking unit 3 and the booster unit 5 below the rotating sleeve 203 can rotate at a high speed, thereby improving the efficiency of the jet unblocking.

[0039] In some optional embodiments, the outer wall of the rotating head 202 is provided with a first groove 2021, and the inner wall of the rotating head 202 is provided with a placement hole 2022 connected to the first groove 2021, and the placement hole 2022 allows the suspension ball 205 to pass through; the rotating sleeve 203 is provided with a second groove 2031, and the first groove 2021 and the second groove 2031 are assembled into the annular groove; the rotating unit 2 also includes a top screw 206, and the top screw 206 is used to be placed in the placement hole 2022 to block the placement hole 2022 after the suspension ball 205 is placed in the annular groove. The first groove 2021 and the second groove 2031 are assembled into the annular groove, and a part of the hanging ball 205 is located in the first groove 2021, and the other part is located in the second groove 2031, so as to realize the connection between the rotating head 202 and the rotating sleeve 203 without affecting the rotation of the two. Two placement holes 2022 are provided, and the two placement holes 2022 are respectively located at the top and bottom of the annular groove. The hanging ball 205 is placed in the annular groove through the placement holes 2022. After all the hanging balls 205 are placed in the annular groove, they are connected to the placement holes 2022 through the top screws 206 to block the placement holes 2022 to prevent the hanging balls 205 from leaking out of the placement holes 2022.

[0040] In some optional embodiments, the injection holes 3031 are spirally distributed on the outer shield 303, and an acute angle is formed between the axis of the injection holes 3031 and the radial direction of the outer shield 303. The acute angle between the axis of the injection holes 3031 and the radial direction of the outer shield 303 can be understood as follows: the axis of the injection holes 3031 is not parallel to the radial direction of the outer shield 303, and the injection fluid ejected from the injection holes 3031 has an acute angle with the circumference of the outer wall of the outer shield 303, forming a thrust on the outer shield 303. Under the action of the injection fluid, the entire injection unblocking unit 3 will form a tangential force perpendicular to the axial direction of the pipe string, so that the injection unblocking unit 3 rotates along the axial direction, thereby enhancing the effect of the injection unblocking operation.

[0041] In some optional embodiments, the rotating unit 2 further includes a tubing coupling 201 and a variable buckle joint 204, wherein the tubing coupling 201 is respectively connected to the anchor unit 1 and the rotating head 202, and the variable buckle joint 204 is respectively connected to the rotating sleeve 203 and the upper joint 301. The tubing coupling 201 is respectively connected to the anchor unit 1 and the rotating head 202 to realize the connection between the rotating unit 2 and the anchor unit 1, and the variable buckle joint 204 is respectively connected to the rotating sleeve 203 and the upper joint 301 to realize the connection between the rotating unit 2 and the jetting deblocking unit 3, and the connection here is all threaded connection.

[0042] In some optional embodiments, the jetting deblocking unit 3 further includes a gasket 302, a second inner cylinder 306 and a lower joint 305, wherein the second inner cylinder 306 is embedded in the upper joint 301 and abuts against the first inner cylinder 304, limiting the axial movement of the first inner cylinder 304 and maintaining coaxiality; the lower joint 305 is connected to the upper joint 301, and a positioning step 3051 is provided on the inner wall of the lower joint 305, and the end face of the positioning step 3051 abuts against the end face of the second inner cylinder 306 .... The two inner cylinders 306 are used for positioning, and the end of the lower joint 305 away from the upper joint 301 is connected to the booster unit 5; there are two gaskets 302, which are respectively arranged between the end face of the outer shield 303 and the end face of the upper joint 301, and between the end face of the outer shield 303 and the lower joint 305. The setting of the gasket 302 can adjust the gap between the connecting surfaces to make the connection tighter, and at the same time can have a buffering effect on the connecting surfaces to avoid wear of parts and components and increase the service life of the device.

[0043] In some optional embodiments, the boost unit 5 also includes a first joint 501, a second joint 510, a shear ring 504 and a sleeve 507, the first joint 501 and the second joint 510 are respectively connected to the two ends of the center tube 503, the first joint 501 is connected to the lower joint 305, the shear ring 504 and the sleeve 507 are outermostly arranged on the center tube 503, the shear ring 504 is connected to the center tube 503 through a shear pin 505, one end face of the sleeve 507 abuts against the end face of the shear ring 504, and the other end face of the sleeve 507 abuts against the end face of the second joint 510; the center tube 503 is provided with a pressure relief hole 5033, and the pressure relief hole 5033 is blocked by the sleeve 507. The second joint 510 is connected to the center tube 503 via a locking pin 508, the shear ring 504 is connected to the center tube 503 via a shear pin 505, one end face of the sleeve 507 abuts against the end face of the shear ring 504, and the other end face of the sleeve 507 abuts against the end face of the second joint 510, the shear ring and the second joint 510 are both fixed so that the sleeve 507 cannot move, the pressure relief hole 5033 is blocked by the sleeve 507, and after the supercharger 509 is placed on the center tube 503, the center tube 503 is sealed to achieve the purpose of pressurization.

[0044] In some optional embodiments, a first annulus 511 is provided between the sliding sleeve 507 and the outer wall of the central pipe 503, and a water-permeable hole 5032 connected to the first annulus 511 is provided on the central pipe 503; when the pressure of the central pipe 503 can cut the shear pin 505, the shear ring 504 and the sliding sleeve 507 slide upwards and leak out of the pressure relief hole 5033, so that the internal and external pressures of the central pipe 503 are balanced. By continuing to pressurize the oil pipe, the fluid of the central pipe 503 enters the first annulus 511 through the water-permeable hole 5032. When the fluid pressure of the central pipe 503 is large enough, the fluid entering the first annulus 511 cuts the shear pin 505, and the shear ring 504 and the sliding sleeve 507 slide upwards and leak out of the pressure relief hole 5033, so that the internal and external pressures of the central pipe 503 are balanced, the pressure is kept stable, and the pressure of the pipe string is not too high, thereby ensuring the safety of the pipe string and improving the safety of the device.

[0045] In some embodiments, a blocker 506 is also provided on the central tube 503. The blocker 506 is located in the water-permeable hole 5032 and is used to control the flow rate of the injection fluid, thereby controlling the pressure. In addition, it can filter the injection fluid, so that the injection effect of the injection fluid is better and the efficiency of injection unblocking is improved.

[0046] In some optional embodiments, the outer wall of the central tube 503 is provided with a first limiting protrusion 5034, the inner wall of the sliding sleeve 507 is provided with a second limiting protrusion 5071, and the shear ring 504 and the sliding sleeve 507 slide upward until the second limiting protrusion 5071 abuts against the first limiting protrusion 5034. The second limiting protrusion 5071 abuts against the first limiting protrusion 5034, so that the upward movement of the shear ring 504 is limited, and the shear ring 504 is prevented from moving excessively and pressing against the first joint 501 to damage it, thereby improving the stability and reliability of the device.

[0047] In some optional embodiments, the booster unit 5 further includes a return spring 502, which is arranged on the center pipe 503 and between the upper joint 301 and the shear ring 504; the return spring 502 is compressed and accumulates a rebound force during the upward sliding of the shear ring 504, and when the thrust driven by the flow pressure of the center pipe 503 is less than the rebound force, the rebound force causes the shear ring 504 and the sliding sleeve 507 to slide downward, closing the pressure relief hole 5033. A return spring 502 is arranged between the upper joint 301 and the shear ring 504, and when the thrust driven by the flow pressure of the center pipe 503 is less than the rebound force, the rebound force causes the shear ring 504 and the sliding sleeve 507 to slide downward, closing the pressure relief hole 5033, so that the pressure between the annulus in the oil pipe and the casing is balanced, the pressure is kept stable, and the pressure of the pipe string is not too low, thereby ensuring the safety of the pipe string and improving the safety of the device.

[0048] In some optional embodiments, the ball-suspended jet unblocking device further includes a connecting nipple 4, and the two ends of the connecting nipple 4 are respectively connected to the lower joint 305 and the first joint 501. By setting the connecting nipple 4 and adjusting the length of the connecting nipple 4, it is possible to adapt to the unblocking of oil wells of different lengths, thereby improving the versatility of the device; in addition, if there are many blocked locations, two or more jet unblocking units 3 can be set as needed, and the connecting nipple 4 can be used for connection, thereby improving the unblocking effect and efficiency of the device.

[0049] The working principle of the ball-suspended jet unblocking device is as follows: before construction, the booster unit 5, the connecting short section 4, the jet unblocking unit 3, the rotating unit 2 and the anchor unit 1 are checked at the wellhead and connected from bottom to top through threads. After the installation and connection are completed, it can be manually confirmed whether the rotating head 202 and the rotating sleeve 203 can rotate flexibly; during construction, the operating machine lowers the ball-suspended jet unblocking device into the layer in the well that needs to be jet unblocked through the oil pipe column, and then starts the ground plunger pump to pump clean water into the oil pipe to circulate and wash the well until the liquid returned from the wellbore is clean, and then stops washing the well; then, the booster 509 is put into the oil pipe. After the booster 509 reaches the specified position inside the sliding sleeve 507 type booster valve (that is, the second positioning protrusion 5091 is in contact with the first positioning protrusion 5031), the ground plunger pump starts to pressurize to 20MPa. When the pressure in the oil pipe is When the force increases, the anchor unit 1 will fix the device pipe string on the casing wall to prevent the device from being displaced during operation; the jet fluid is passed through the jet unblocking unit 3 to perform jet unblocking operations on the perforations on the casing and the near-wellbore area; under the action of the jet fluid, the entire jet unblocking unit 3 will form a tangential force perpendicular to the axial direction of the tubing string, causing the jet unblocking unit 3 to self-rotate along the axial direction, thereby enhancing the effect of the jet unblocking operation; when the ground plunger pump continues to pressurize and the pressure in the tubing is too high, the sliding sleeve 507 on the booster unit 5 will move upward to open the pressure relief hole 5033, relieve the pressure of the fluid in the tubing, balance the pressure between the tubing and the annulus in the casing, maintain pressure stability and the safety of the tubing string; when the jet unblocking operation is completed, the ground plunger pump stops pressurizing, and the wellhead is depressurized to 0 MPa. At this time, the operating machine can be used to pull out the tubing and tool pipe string, and recover the tool.

[0050] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0051] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0052] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A ball-suspended jetting unblocking device, characterized in that: It includes an anchor unit, a rotating unit, a jetting and unblocking unit and a pressurizing unit, wherein: One end of the anchor unit is connected to the rotating unit, and the other end is connected to the oil pipe, and is used to anchor on the casing wall when the oil pipe pressure rises to a preset pressure value; The rotating unit comprises a rotating head, a rotating sleeve and a plurality of hanging balls, wherein the rotating head and the rotating sleeve are nested and connected and an annular groove is formed therebetween, and the plurality of hanging balls are arranged in the annular groove; The two ends of the jet unblocking unit are respectively connected to the rotating unit and the supercharging unit, and the jet unblocking unit comprises a first inner tube, an upper joint and an outer shield, the upper joint is covered on the first inner tube, the outer shield is covered on the upper joint, the upper joint and the first inner tube are provided with a fluid channel, and the outer shield is provided with a jet hole, and the jet hole is connected with the fluid channel; The boosting unit includes a central tube and a supercharger, the inner wall of the central tube is provided with a first positioning protrusion, the outer wall of the supercharger is provided with a second positioning protrusion, and the supercharger is placed in the central tube so that the second positioning protrusion fits with the first positioning protrusion to seal the central tube and achieve the purpose of boosting.

2. The ball-suspended jetting unblocking device according to claim 1 is characterized in that: The outer wall of the rotating head is provided with a first groove, and the inner wall of the rotating head is provided with a placement hole connected to the first groove, and the placement hole allows the hanging ball to pass through; the rotating sleeve is provided with a second groove, and the first groove and the second groove are combined to form the annular groove; The rotating unit further includes a top screw, which is used to be placed in the placement hole to block the placement hole after the suspension ball is placed in the annular groove.

3. The ball-suspended jetting unblocking device according to claim 1 is characterized in that: The injection holes are distributed in a spiral pattern on the outer shroud, and an acute angle is formed between the axes of the injection holes and the radial direction of the outer shroud.

4. The ball-suspended jetting unblocking device according to claim 2 is characterized in that: The rotating unit further comprises an oil pipe coupling and a variable buckle joint, wherein the oil pipe coupling is respectively connected to the anchor unit and the rotating head, and the variable buckle joint is respectively connected to the rotating sleeve and the upper joint.

5. The ball-suspended jetting unblocking device according to claim 4 is characterized in that: The jet deplugging unit also includes a gasket, a second inner tube and a lower joint, wherein the second inner tube is embedded in the upper joint and abuts against the first inner tube; the lower joint is connected to the upper joint, and a positioning step is provided on the inner wall of the lower joint, the end face of the positioning step abuts against the end face of the second inner tube, and the end of the lower joint away from the upper joint is connected to the boosting unit; two gaskets are provided, and the two gaskets are respectively arranged between the end face of the outer shield and the end face of the upper joint, and between the outer shield and the end face of the lower joint.

6. The ball-suspended jetting unblocking device according to claim 5 is characterized in that: The booster unit also includes a first joint, a second joint, a shear ring and a sleeve. The first joint and the second joint are respectively connected to the two ends of the center tube, the first joint is connected to the lower joint, the shear ring and the sleeve are sleeved on the center tube, the shear ring is connected to the center tube through a shear pin, one end face of the sleeve abuts against the end face of the shear ring, and the other end face of the sleeve abuts against the end face of the second joint; the center tube is provided with a pressure relief hole, and the pressure relief hole is blocked by the sleeve.

7. The ball-suspended jetting unblocking device according to claim 6 is characterized in that: A first annulus is provided between the sliding sleeve and the outer wall of the central tube, and a water-permeable hole connected to the first annulus is provided on the central tube; When the pressure of the central tube is able to shear the shear pin, the shear ring and the sliding sleeve slide upward and leak out of the pressure relief hole, so that the internal and external pressures of the central tube are balanced.

8. The ball-suspended jetting unblocking device according to claim 7 is characterized in that: The outer wall of the central tube is provided with a first limiting protrusion, the inner wall of the sliding sleeve is provided with a second limiting protrusion, and the shear ring and the sliding sleeve slide upward until the second limiting protrusion abuts against the first limiting protrusion.

9. The ball-suspended jetting unblocking device according to claim 8, characterized in that: The booster unit also includes a return spring, which is arranged on the center tube and located between the upper joint and the shear ring; the return spring is compressed and accumulates rebound force during the upward sliding of the shear ring, and when the thrust driven by the flow pressure of the center tube is less than the rebound force, the rebound force causes the shear ring and the sleeve to slide downward, closing the pressure relief hole.

10. The ball-suspended jetting unblocking device according to any one of claims 6 to 9, characterized in that: It also includes a connecting short section, and two ends of the connecting short section are respectively connected to the lower joint and the first joint.

Images