Vector nozzle water jet cutting blockage removal device and dredging blockage removal method

Abstract

The invention relates to the technical field of oil exploitation plug removal devices, in particular to a thrust vectoring nozzle water jet cutting plug removal device and a dredging plug removal method, and aims to solve the technical problems that in the prior art, a sand control screen pipe plug removal device is poor in flushing and dredging effect, and pipe wall deposits are difficult to clean away. The thrust vectoring nozzle water jet cutting blockage removal device comprises a high-pressure jet pump and a spray head, wherein the spray head comprises a cavity and a thrust vectoring nozzle; the high-pressure injection pump is communicated with the cavity; one end of the thrust vectoring nozzle is communicated with the cavity, and the other end is used for spraying water jet; the thrust vectoring nozzle comprises a plurality of sub-nozzles, the adjacent sub-nozzles are hinged and provided with corner adjusting assemblies, and the corner adjusting assemblies are configured to adjust the included angle between every two adjacent sub-nozzles under the starting working condition. According to the thrust vectoring nozzle water jet cutting blockage removal device, deposits attached to the inner wall of the sand control screen pipe can be cut down by a certain thickness in a mode similar to a water jet cutting mode, and the more efficient dredging effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of oil production unblocking devices, and in particular to a vector nozzle water jet cutting unblocking device and a silt clearing and unblocking method. Background Art

[0002] In the process of oil production, sand control is an indispensable part of the exploitation of sand-producing oil and gas reservoirs. Sand control screens are the most commonly used method of oil well sand control in oil fields today. After a period of oil well production, blockages such as fine sand, mud, asphalt colloid in the formation output fluid and solid particles remaining in the drilling fluid will block the screen and the annular sand layer outside the screen, causing oil well blockage and a serious decline in production.

[0003] The common sand screen pipe unblocking devices in the prior art generally use a rotatable nozzle, and the peripheral wall of the nozzle is provided with a spray hole. When the nozzle rotates at a high speed, the spray hole can spray water toward the inner wall of the screen pipe, thereby achieving the effect of flushing, desilting and unblocking. However, the sand screen pipe unblocking devices in the prior art all use a flushing method from the outside to the inside to flush and desilt the screen pipe wall. This flushing method has certain disadvantages. For example, after flushing away a certain thickness of silt, the flushing effect of the water flow will be reduced, and the flushing water flow will squeeze the silt to a certain extent, so that the silt near the wall of the sand screen pipe will be more closely attached to the wall of the screen pipe, making it more difficult to clean it deeply. Summary of the invention

[0004] The purpose of the present invention is to provide a vector nozzle water jet cutting and unblocking device and a silt clearing and unblocking method to alleviate the technical problems in the prior art of the sand control screen pipe unblocking device, such as poor flushing and silt clearing effect and difficulty in cleaning off the silt deposits on the pipe wall.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0006] In a first aspect, the present invention provides a vector nozzle water jet cutting and unblocking device, comprising: a high-pressure jet pump and a nozzle, wherein the nozzle comprises a cavity and a vector nozzle;

[0007] The high-pressure jet pump is connected to the cavity;

[0008] One end of the vector nozzle is connected to the cavity, and the other end is used for spraying water jets;

[0009] The vector nozzle includes a plurality of sub-nozzles, adjacent sub-nozzles are hinged, and are provided with an angle adjustment component, wherein the angle adjustment component is configured to adjust the angle between two adjacent sub-nozzles under a startup condition.

[0010] Furthermore, the rotation angle adjustment assembly includes a linear drive and a push-pull rod, wherein the linear drive is in transmission connection with the push-pull rod to drive the push-pull rod to move along its own axial direction;

[0011] The body of the linear actuator is hinged to one of the sub-nozzles, and the other sub-nozzle is hinged to an end of the push-pull rod away from the linear actuator.

[0012] Furthermore, a corner structure is provided between adjacent sub-nozzles, and the corner structure includes a spherical hinge joint and a spherical hinge sleeve;

[0013] The spherical hinge joint is movably embedded in the spherical hinge sleeve, and the two are separately arranged on the two sub-nozzles.

[0014] Furthermore, the vector nozzle water jet cutting and unblocking device also includes a first rotation drive component, which is arranged in the cavity and is transmission-connected to the vector nozzle to drive the vector nozzle to rotate around its own axis.

[0015] Furthermore, along the ejection direction of the water jet, the ejection opening of the sub-nozzle away from the cavity is in an expanded shape with a gradually increasing diameter.

[0016] Furthermore, along the ejection direction of the water jet, the ejection opening of the sub-nozzle away from the cavity is in a contraction shape with a gradually decreasing diameter.

[0017] Furthermore, a plurality of the nozzles are provided, and along the circumference of the cavity, the plurality of the nozzles are distributed at intervals on the side wall of the cavity.

[0018] Furthermore, a packer, a downhole filter and a centralizer are provided between the high-pressure jet pump and the nozzle;

[0019] The packer is connected to the high-pressure jet pump, the downhole filter is arranged between the packer and the centralizer, and is connected to the two respectively, and the centralizer is connected to the vector nozzle.

[0020] Furthermore, a second rotation drive assembly is provided between the centralizer and the vector nozzle, and the second rotation drive assembly is transmission-connected to the cavity to drive the cavity to rotate around its own axis.

[0021] In a second aspect, the present invention further provides a method for clearing silt and removing blockages, which is based on the above-mentioned vector nozzle water jet cutting and removing blockage device, and comprises the following steps:

[0022] S1: driving the nozzle to move along the axial direction of the sand control screen, adjusting the angle between adjacent sub-nozzles, so that each sub-nozzle extends along the same straight line, and cutting the sediment on the inner wall of the sand control screen into strip-shaped gaps through the vector nozzle;

[0023] S2: adjusting the sub-nozzle away from the cavity so as to be perpendicular to the bottom side wall of the strip-shaped gap;

[0024] S3: driving the nozzle to reset and move along the inner wall of the sand control screen.

[0025] In summary of the above technical solutions, the technical effects that can be achieved by the vector nozzle water jet cutting and unblocking device provided by the present invention are:

[0026] The vector nozzle water jet cutting and unblocking device provided by the present invention comprises a high-pressure jet pump and a nozzle, the nozzle comprises a cavity and a vector nozzle; the high-pressure jet pump is connected to the cavity; one end of the vector nozzle is connected to the cavity, and the other end is used to spray a water jet; the vector nozzle comprises a plurality of sub-nozzles, adjacent sub-nozzles are hinged, and an angle adjustment component is provided, and the angle adjustment component is configured to adjust the angle between two adjacent sub-nozzles under the starting condition.

[0027] In the vector nozzle water jet cutting and unblocking device, the water jet enters the cavity through the high-pressure jet pump and is ejected through the vector nozzle. By adjusting the angle between the two adjacent sub-nozzles, the ejection direction of the water jet is correspondingly adjusted. In specific applications, the vector nozzle water jet cutting and unblocking device is placed in the sand screen and moved along the axial direction of the sand screen. At the same time, a high-speed flowing water jet is pumped to the nozzle through the high-pressure jet pump. After the water jet enters the cavity, it passes through multiple sub-nozzles in sequence and then ejects. In this way, a strip-shaped gap is initially cut on the sediment attached to the inner wall of the sand screen; then the vector nozzle is reset and moved along the strip gap, and the sub-nozzle is adjusted so that the sub-nozzle away from the cavity is perpendicular to the bottom side wall of the strip gap. At this time, the bottom side wall of the strip gap is vertically jetted and cut by the vector nozzle, so that the sediment attached to the inner wall of the sand screen can be "cut" down with a certain thickness.

[0028] Compared with the prior art, the vector nozzle water jet cutting and unblocking device provided in the embodiment of the present application can "cut" off the silt attached to the inner wall of the sand control screen pipe in a certain thickness in a manner similar to water jet cutting, and has a more efficient dredging effect, especially for the silt on the pipe wall, which can be removed more easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the overall structure of a vector nozzle water jet cutting and unblocking device provided in an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of the partial structure of a vector nozzle water jet cutting and unblocking device provided in an embodiment of the present invention;

[0032] Figure 3 A front view of a vector nozzle water jet cutting and unblocking device provided in an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of the structure of a nozzle provided by an embodiment of the present invention;

[0034] Figure 5 A top view of a nozzle provided by an embodiment of the present invention;

[0035] Figure 6 A flow chart of a dredging and unblocking method provided in an embodiment of the present invention.

[0036] Icon: 1- High-pressure injection pump;

[0037] 2-nozzle; 21-chamber; 22-vector nozzle; 23-angle adjustment component; 221-sub-nozzle; 231-linear drive; 232-push-pull rod;

[0038] 3-packer; 4-downhole filter; 5-centralizer; 6-second rotary drive assembly. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] The amount of propulsion fluid that existing artificial satellites can carry is very limited. After the propulsion fluid is consumed, the satellite can no longer continue to operate normally, which seriously limits the operating life of the artificial satellite.

[0043] In view of this, the present invention provides a vector nozzle water jet cutting and unblocking device, comprising a high-pressure jet pump 1 and a nozzle 2, the nozzle 2 comprising a cavity 21 and a vector nozzle 22; the high-pressure jet pump 1 is connected to the cavity 21; one end of the vector nozzle 22 is connected to the cavity 21, and the other end is used to spray a water jet; the vector nozzle 22 comprises a plurality of sub-nozzles 221, adjacent sub-nozzles 221 are hinged, and an angle adjustment component 23 is provided, and the angle adjustment component 23 is configured to adjust the angle between two adjacent sub-nozzles 221 under the starting condition.

[0044] In the vector nozzle water jet cutting and unblocking device, the water jet enters the cavity 21 through the high-pressure jet pump 1 and is ejected through the vector nozzle 22. By adjusting the angle between two adjacent sub-nozzles 221, the injection direction of the water jet is correspondingly adjusted. In specific application, the vector nozzle water jet cutting and unblocking device is placed in the sand screen and moved along the axial direction of the sand screen. At the same time, a high-speed flowing water jet is pumped to the nozzle 2 by the high-pressure jet pump 1. After the water jet enters the cavity 21, it passes through multiple sub-nozzles 221 in sequence and then is ejected. In this way, a strip-shaped gap is initially cut on the silt attached to the inner wall of the sand screen. Then the vector nozzle 22 is reset and moved along the strip gap, and the sub-nozzle 221 is adjusted so that the sub-nozzle 221 away from the cavity 21 is perpendicular to the bottom side wall of the strip gap. At this time, the bottom side wall of the strip gap is vertically jetted and cut by the vector nozzle 22, so that the silt attached to the inner wall of the sand screen can be "cut" down to a certain thickness.

[0045] Compared with the prior art, the vector nozzle water jet cutting and unblocking device provided in the embodiment of the present application can "cut" off the silt attached to the inner wall of the sand control screen pipe in a certain thickness in a manner similar to water jet cutting, and has a more efficient dredging effect, especially for the silt on the pipe wall, which can be removed more easily.

[0046] The following combination Figures 1 to 5The structure and shape of the vector nozzle water jet cutting and unblocking device provided in this embodiment are described in detail:

[0047] For further reference, Figures 1 to 3 A packer 3, a downhole filter 4 and a centralizer 5 are provided between the high-pressure jet pump 1 and the nozzle 2; the packer 3 is connected to the high-pressure jet pump 1, the downhole filter 4 is arranged between the packer 3 and the centralizer 5, and is connected to the two respectively, and the centralizer 5 is connected to the vector nozzle 22.

[0048] Here, the packer 3 separates the high-pressure jet pump 1 from the nozzle 2, the downhole filter 4 prevents the silt from clogging the vector nozzle 22, and the centralizer 5 ensures that the vector nozzle water jet cutting and unblocking device is located in the center of the sand control screen.

[0049] Regarding the vector nozzle 22, specifically:

[0050] refer to Figure 4 A corner structure is provided at the connection of two adjacent sub-nozzles 221, and the corner structure enables the two sub-nozzles 221 to rotate relative to each other at the connection end. Here, the corner structure can be provided in a variety of specific forms, for example, a transmission gear ring structure, a ball joint structure, etc. can all achieve the function of enabling the two sub-nozzles 221 to rotate relative to each other at the connection end.

[0051] By providing a corner structure at the connection between two adjacent sub-nozzles 221, it can be ensured that every two adjacent sub-nozzles 221 can rotate, so that the vector nozzle 22 has a higher degree of freedom to adjust its own bending degree, making the injection direction of the injection port more flexible.

[0052] More preferably, the corner structure includes a spherical hinge head and a spherical hinge sleeve; the spherical hinge head is movably embedded in the spherical hinge sleeve, and the two are separately arranged in the two sub-nozzles 221.

[0053] Specifically, Figure 4 As shown, the corner structure is specifically configured as a spherical hinge joint and a spherical hinge sleeve, the spherical hinge joint and the spherical hinge sleeve are respectively arranged at the connecting ends of two adjacent sub-nozzles 221, and the spherical hinge joint is movably inserted in the spherical hinge sleeve, so that the spherical hinge joint can be rotated in all directions against the spherical hinge sleeve, so that the two adjacent sub-nozzles 221 can rotate more flexibly relative to each other.

[0054] Continue to refer Figure 4The angle adjustment component 23 includes a linear driver 231 and a push-pull rod 232. The linear driver 231 can adopt a linear motor, which is transmission-connected to the push-pull rod 232 to drive the push-pull rod 232 to move along its own axial direction; the body of the linear driver 231 is hinged to one of the sub-nozzles 221, and the other sub-nozzle 221 is hinged to one end of the push-pull rod 232 away from the linear driver 231.

[0055] With the above design, when the linear driver 231 is started, the push-pull rod 232 can be driven to do a reciprocating push-pull motion, thereby adjusting the angle between two adjacent sub-nozzles 221. The design is simple in structure and convenient to control.

[0056] Furthermore, the vector nozzle water jet cutting and unblocking device also includes a first rotation drive component, which is arranged in the cavity 21 and is transmission-connected to the vector nozzle 22 to drive the vector nozzle 22 to rotate around its own axis.

[0057] Specifically, the vector nozzle 22 is rotated in coordination with the cavity 21, and the sub-nozzle 221 directly connected to the cavity 21 rotates around its own axis through the first rotation drive assembly, so that the vector nozzle 22 rotates around the axis of the sub-nozzle 221. With this design, the cutting range of the silt attached to the inner wall of the sand control screen can be adjusted more flexibly. In addition, here, the first rotation drive assembly is an application of the existing structure, which is not repeated here.

[0058] Optionally, along the ejection direction of the water jet, the ejection port of the sub-nozzle 221 away from the cavity 21 is in an expanded shape with a gradually increasing diameter.

[0059] Specifically, the jet port of the vector nozzle 22 is set to be an expanded shape with a gradually increasing diameter along the outflow direction of the high-pressure water jet, so that when the silt on the inner wall of the sand control screen is initially sprayed through the jet port to cut the strip-shaped gap, the width of the strip-shaped gap can be larger, which is more convenient for the subsequent resetting movement of the vector nozzle 22 along the strip-shaped gap.

[0060] Optionally, along the ejection direction of the water jet, the ejection port of the sub-nozzle 221 away from the cavity 21 is in a contraction shape with a gradually decreasing diameter.

[0061] Specifically, the jet port of the vector nozzle 22 is arranged to be a tapered port with a gradually decreasing diameter along the outflow direction of the high-pressure water jet, so that when the jet port is used to dig and cut from the side wall of the strip-shaped gap, the effective cutting head of the jet port can be farther, thereby improving the cutting efficiency of the silt.

[0062] Furthermore, a plurality of nozzles 2 are provided, and along the circumference of the cavity 21 , the plurality of nozzles 2 are distributed at intervals on the side wall of the cavity 21 .

[0063] Specifically, Figure 5As shown, at this time, six vector nozzles 22 are evenly spaced along the side wall of the cavity 21, so that when the nozzle 2 clears and unblocks the silt on the inner wall of the sand control screen, the nozzle 2 only needs to rotate a certain angle during the lifting movement, or even does not need to rotate. The six vector nozzles 22 can simultaneously spray high-speed cutting water flow to simultaneously cut and clear the silt area attached to the inner wall of the sand control screen.

[0064] For further reference, Figure 2 A second rotary drive assembly 6 is provided between the centralizer 5 and the vector nozzle 22. The second rotary drive assembly 6 is transmission-connected to the cavity 21 to drive the cavity 21 to rotate around its own axis.

[0065] Specifically, Figure 2 As shown, the second rotary drive assembly 6 is used to drive the nozzle 2 to rotate around its own axis, so that when the nozzle 2 drives the vector nozzle 22 to move up and down along the inner wall of the sand control screen, the actual movement trajectory of the vector nozzle 22 is spiral lifting, and the effective dredging cutting area of ​​the injection port of the vector nozzle 22 is a spiral belt, so that the dredging efficiency of the vector nozzle water jet cutting and unblocking device can be more efficient. In addition, here, the second rotary drive assembly 6 is an application of the existing structure, which is not repeated here.

[0066] refer to Figure 6 The present invention also provides a method for clearing silt and removing blockages. The method is implemented based on the above-mentioned vector nozzle water jet cutting and removing blockage device, and includes the following steps:

[0067] S1: drive the nozzle 2 to move along the axial direction of the sand screen, adjust the angle between adjacent sub-nozzles 221, make each sub-nozzle 221 extend along the same straight line, and cut the silt on the inner wall of the sand screen into a strip-shaped gap through the vector nozzle 22; S2: adjust the sub-nozzle 221 away from the cavity 21 to make it perpendicular to the bottom side wall of the strip-shaped gap; S3: drive the nozzle 2 to reset and move along the inner wall of the sand screen, and cut from the bottom side wall of the strip-shaped gap through the vector nozzle 22. This method can effectively flush and desilt, making it easier to clean the silt on the pipe wall.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vector nozzle water jet cutting and unblocking device, characterized in that: include: A high-pressure jet pump (1) and a nozzle (2), wherein the nozzle (2) comprises a cavity (21) and a vector nozzle (22); The high-pressure jet pump (1) is connected to the cavity (21); One end of the vector nozzle (22) is connected to the cavity (21), and the other end is used for spraying a water jet; The vector nozzle (22) comprises a plurality of sub-nozzles (221), adjacent sub-nozzles (221) are hinged, and are provided with an angle adjustment component (23), wherein the angle adjustment component (23) is configured to adjust the angle between two adjacent sub-nozzles (221) under a starting condition.

2. The vector nozzle water jet cutting and unblocking device according to claim 1 is characterized in that: The rotation angle adjustment component (23) comprises a linear drive (231) and a push-pull rod (232), wherein the linear drive (231) is transmission-connected to the push-pull rod (232) to drive the push-pull rod (232) to move along its own axial direction; The body of the linear driver (231) is hinged to one of the sub-nozzles (221), and the other sub-nozzle (221) is hinged to one end of the push-pull rod (232) away from the linear driver (231).

3. The vector nozzle water jet cutting and unblocking device according to claim 1 is characterized in that: A corner structure is provided between adjacent sub-nozzles (221), wherein the corner structure comprises a spherical hinge joint and a spherical hinge sleeve; The spherical hinge head is movably embedded in the spherical hinge sleeve, and the two are respectively arranged on the two sub-nozzles (221).

4. The vector nozzle water jet cutting and unblocking device according to claim 1, characterized in that: The vector nozzle water jet cutting and unblocking device further comprises a first rotary drive assembly, which is arranged in the cavity (21) and is transmission-connected to the vector nozzle (22) so as to drive the vector nozzle (22) to rotate around its own axis.

5. The vector nozzle water jet cutting and unblocking device according to claim 1, characterized in that: Along the ejection direction of the water jet, the ejection opening of the sub-nozzle (221) away from the cavity (21) is in an expanded shape with a gradually increasing diameter.

6. The vector nozzle water jet cutting and unblocking device according to claim 1, characterized in that: Along the ejection direction of the water jet, the ejection opening of the sub-nozzle (221) away from the cavity (21) is in a contraction shape with a gradually decreasing diameter.

7. The vector nozzle water jet cutting and unblocking device according to claim 1, characterized in that: A plurality of the nozzles (2) are provided, and along the circumference of the cavity (21), the plurality of nozzles (2) are distributed at intervals on the side wall of the cavity (21).

8. The vector nozzle water jet cutting and unblocking device according to any one of claims 1 to 7, characterized in that: A packer (3), a downhole filter (4) and a centralizer (5) are provided between the high-pressure jet pump (1) and the nozzle (2); The packer (3) is connected to the high-pressure jet pump (1), the downhole filter (4) is arranged between the packer (3) and the centralizer (5), and is connected to both respectively, and the centralizer (5) is connected to the vector nozzle (22).

9. The vector nozzle water jet cutting and unblocking device according to claim 8, characterized in that: A second rotary drive assembly (6) is provided between the centralizer (5) and the vector nozzle (22), and the second rotary drive assembly (6) is transmission-connected to the cavity (21) to drive the cavity (21) to rotate around its own axis.

10. A method for clearing silt and unblocking, characterized in that: The vector nozzle water jet cutting and unblocking device according to any one of claims 1 to 9 comprises the following steps: S1: driving the nozzle (2) to move along the axial direction of the sand control screen, adjusting the angle between adjacent sub-nozzles (221), so that each sub-nozzle (221) extends along the same straight line, and cutting the sediment on the inner wall of the sand control screen into strip-shaped gaps through the vector nozzle (22); S2: adjusting the sub-nozzle (221) away from the cavity (21) so as to be perpendicular to the bottom side wall of the strip-shaped gap; S3: driving the nozzle (2) to reset and move along the inner wall of the sand control screen.

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