Sand washing tool and sand washing and preventing integrated tubular column
By setting open and closed flushing holes and switch components in the sand-flushing tool, the dual functions of sand-flushing and sand-proofing are realized, and the problem of sand-flushing operations in the existing technology requires multiple sand-proof pipe columns and long operation cycles. Simplify the construction process and improve efficiency.
Patent Information
- Application Number
- CN202310714451.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-15
- Publication Date
- 2024-12-17
AI Technical Summary
In the prior art, the sand prevention pipe column needs to be launched multiple times during the sand-pulling operation and the sand-pulling operation cycle is relatively long, resulting in high cost and long time problems.
A sand-flushing tool and a sand-proof integrated pipe column are designed. By setting open and closed flushing holes in the sand-flushing tool, the switch assembly is used to control the opening and blockage of the flushing holes, so as to realize the dual functions of sand-flushing and sand-proofing. When sand exists, sand flushing operations are carried out directly. After the sand flushing is finished, it becomes an ordinary sand-proof pipe column to prevent sand from jamming the screen pipe, simplify the construction process, and shorten the operation cycle.
The sand flushing and sand prevention operations are completed in one operation, avoiding the sand falling back on the screen pipe and suspension, shortening the operation cycle and improving the reliability and efficiency of construction.
Smart Images
Figure CN119145808A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of petroleum extraction, and specifically relates to a sand flushing tool and an integrated sand flushing and prevention pipe string. Background Art
[0002] At present, in the underground operation of oil and gas fields, the integrated screen-flushing and sand-control string mainly adopts a screen-flushing and sand-control string with a flushing tool at the bottom, and realizes the integration of sand flushing and well washing through a hanger with inner and outer strings.
[0003] Sand production in sandstone reservoirs is a common phenomenon in oil and water wells. The degree of sand production is affected by many factors, such as reservoir physical properties, particle cementation, and water injection intensity. In the later stages of oil well development, the pockets are short, and the formation sand will quickly fill the pockets during the lowering of the sand control string, resulting in the need to repeatedly raise and lower the sand control string and perform multiple sand flushing operations, which is costly and time-consuming.
[0004] Reverse circulation sand flushing is a sand flushing method in which the sand flushing working fluid flows downward along the annular space between the sand flushing tool and the casing to impact the sand at the bottom of the well. The dispersed sand is mixed with the sand flushing working fluid and returned to the surface along the sand flushing pipe.
[0005] In the related art, the closing of the reverse circulation sand flushing device is unreliable, and the sand flushing tool is easily filled with sand during the sand flushing operation, resulting in sand flushing failure. The sand flushing tool needs to be lowered into the tubing multiple times, and the operation process is relatively cumbersome. At the same time, the sand flushing operation cycle is relatively long. Summary of the invention
[0006] In order to solve the above technical problems, the present application provides a sand flushing tool and an integrated sand flushing and control pipe string to solve the technical problems of multiple trips to the sand control pipe string and multiple sand flushing operations with a long operation cycle during the sand control operation.
[0007] The technical solution of this application is:
[0008] In one aspect, the present application discloses a sand blasting tool, the sand blasting tool comprising:
[0009] A joint, an outer tube and an isolation tube connected in sequence in the same direction, wherein an installation groove is provided at one end of the isolation tube facing the outer tube, and a plurality of flushing holes are provided at intervals on the circumference of the isolation tube, and the plurality of flushing holes are all connected to the installation groove;
[0010] An opening and closing body and a switch assembly, wherein the opening and closing body is movably arranged in the mounting groove of the isolation tube, and the switch assembly is slidably arranged in the outer tube, and the switch assembly and the joint are sealed. By manipulating the switch assembly to slide in the outer tube, the opening and closing body can be controlled to block or open the plurality of flushing holes.
[0011] In some embodiments, the opening and closing body includes a sliding sleeve, a connecting sleeve and a blocking piece connected in sequence along the same direction, wherein the sliding sleeve is detachably and slidably connected to the outer tube, the connecting sleeve is slidably connected to the isolation tube, and a connecting hole corresponding to the flushing hole is provided on the side wall of the connecting sleeve, and the blocking piece can block the flushing hole. By operating the sliding sleeve to slide in the outer tube, the corresponding connecting hole and the flushing hole can be connected, or the blocking piece can block the flushing hole.
[0012] In some embodiments, the peripheral surface of the blocking member toward one end of the outer tube is tapered.
[0013] In some embodiments, the isolation tube has a support portion protruding from the inner wall of the outer tube at one end facing the outer tube, and the connecting sleeve includes a main body, a transition sleeve and a connector connected in sequence along the same direction, the transition sleeve rests on the support portion, and the connector is slidably connected in the isolation tube.
[0014] In some embodiments, a supporting protrusion is provided on the inner wall of the joint;
[0015] One end of the sliding sleeve facing away from the blocking member extends into the joint, and a plurality of support blocks which can be suspended on the support protrusions are arranged at intervals on the outer circumference of the sliding sleeve.
[0016] In some embodiments, an angle between an end surface of the support block facing the support protrusion and an outer peripheral surface of the support block is an acute angle.
[0017] In some embodiments, the angle between the end surface of the support block facing away from the support protrusion and the outer peripheral surface of the support block is an acute angle.
[0018] In some embodiments, a limiting protrusion is further provided on the inner wall of the joint, the limiting protrusion is provided between the supporting protrusion and the isolation tube, and the supporting block is operably suspended on the limiting protrusion.
[0019] In some embodiments, the switch assembly comprises:
[0020] The driving sleeve is used for connecting with the oil pipe, and the driving sleeve is fixedly arranged in the sliding sleeve.
[0021] On the other hand, the present application also provides a sand flushing column, the sand flushing column comprising:
[0022] The hanger, the screen pipe and the above-mentioned sand flushing tool are connected in sequence along the same direction;
[0023] An oil pipe is arranged in the screen tube, and the oil pipe is connected to a switch assembly of the sand flushing tool.
[0024] The present application provides a sand flushing tool and an integrated sand flushing and sand control string with the sand flushing tool. In the downhole stage, the flushing hole is in an open state, and the integrated sand flushing and sand control string can be used as a sand flushing string. When there is sand between the casing and the string, and the string cannot be lowered to the designed position and encounters resistance in advance, the sand flushing operation can be directly performed, that is, the sand flushing fluid enters from the annulus between the casing and the screen pipe and reaches the bottom of the well. The sand flushing fluid carries the formation sand and enters the oil pipe from the opened flushing hole, flows through the inside of the hanger, and returns to the ground from the oil pipe. After the sand flushing is completed, the sand control string can be smoothly lowered to the designed position. Then, after the hanger is set and released, the opening and closing body closes multiple flushing holes by operating the switch assembly to slide in the outer tube, and the overall string becomes a common sand control string to realize the sand control function, and the oil well is produced normally; after the sand control string fails in the later stage, the sand flushing string can be lowered, the switch assembly is operated to slide in the outer tube, and the opening and closing body opens multiple flushing holes to establish a sand return channel to form a sand flushing string. During sand flushing, the sand only remains inside the oil pipe and will not get stuck in the screen pipe, thus preventing sand from getting stuck in the pipe column. In addition, backwashing prevents sand from falling back on the screen pipe and the hanger during the sand flushing process. This is a simple and reliable construction process that can complete sand flushing and sand prevention operations in one operation with a short operation cycle and great practical value. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0026] In the attached figure:
[0027] Figure 1 A schematic structural diagram of a sand blasting tool disclosed in an embodiment of the present application when in a second position;
[0028] Figure 2 To have Figure 1 The structure diagram of the sand flushing string of the sand flushing tool shown in the figure is in the downhole state;
[0029] Figure 3 To have Figure 1 The structure diagram of the sand flushing string of the sand flushing tool shown is in the well completion state;
[0030] Figure 4 To have Figure 1 The structure schematic diagram of the sand flushing column of the sand flushing tool shown in the backwashing state;
[0031] Figure 5 for Figure 1 A schematic cross-sectional view of the isolation pipe in FIG.
[0032] Figure 6 for Figure 1 Schematic diagram of the structure of the sliding sleeve.
[0033] Reference numerals:
[0034] Joint-100, supporting protrusion-101, limiting protrusion-102, outer tube-200, isolation tube-300, flushing hole 301, opening and closing body-400, sliding sleeve-401, connecting sleeve-402, main body-4021, transition sleeve-4022, connecting body-4023, plugging piece-403, supporting block-404, switch assembly-500, driving sleeve-501, limiting ring-502, screen tube-600, first sealing ring-700, second sealing ring-800, shear pin-900, oil pipe-1000, casing-1100, hanger-1200, third sealing ring-1300. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions 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 this field without creative work are within the scope of protection of this application.
[0036] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0037] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and examples of materials provided by the present application, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.
[0038] The present application is described below with reference to the accompanying drawings and specific embodiments:
[0039] On the one hand, embodiments of the present application provide a sand blasting tool. Figure 1 This is a structural schematic diagram of a sand blasting tool disclosed in an embodiment of the present application when it is in a second position. Figure 2 To have Figure 1The schematic diagram of the structure of the sand flushing string of the sand flushing tool in the downhole state is shown. Figure 3 To have Figure 1 The structural diagram of the sand flushing string of the sand flushing tool shown in the figure is in the well completion state. Figure 4 To have Figure 1 The structural diagram of the sand flushing tool sand flushing column in the backwashing state is shown in FIG. Figure 1-Figure 4 The sand flushing tool includes a joint 100, an outer tube 200, a sealing tube 300, an opening and closing body 400 and a switch assembly 500 which are sequentially connected in the same direction.
[0040] It should be noted that the above direction may be the direction of the pipe column when in use, that is, the vertical direction. For the convenience of description, the embodiment of the present application defines the direction as the vertical direction. When the pipe column is not in use, such as in the working conditions of assembly and manufacturing, the vertical direction may be the horizontal direction or the oblique direction, etc., which is not limited here.
[0041] Combination Figure 1-Figure 4 The upper end of the joint 100 is used to connect with the screen tube 600, and can be specifically connected by threaded connection, screw connection or clamping connection, so that when the pipe string is in use, the joint 100 and the screen tube 600 are in a fixed assembly form.
[0042] Combination Figure 1 The upper end of the outer tube 200 is connected to the lower end of the joint 100, and specifically, threaded connection, screw connection or clamping connection can be adopted, so that when the pipe string is in use, the joint 100 and the outer tube 200 are in a fixed assembly form.
[0043] Combination Figure 1 A plurality of first sealing rings 700 may be provided between the upper end of the outer tube 200 and the lower end of the joint 100 to improve the sealing reliability after the two are assembled and ensure that the liquid can only enter the oil pipe from outside the screen tube. Figure 1 The lower ends of the isolation tube 300 and the outer tube 200 are connected, specifically by threaded connection, screw connection or clamping, so that when the pipe string is in use, the isolation tube 300 and the outer tube 200 are in a fixed assembly form.
[0044] Combination Figure 1 A plurality of second sealing rings 800 may also be provided between the lower ends of the isolation tube 300 and the outer tube 200 to improve the sealing reliability after the two are assembled.
[0045] Figure 5 for Figure 1 Schematic diagram of the cross section of the isolation tube, combined with Figure 1 as well as Figure 5The isolation tube 300 may be cylindrical as a whole, and an installation groove may be provided at one end of the isolation tube 300 facing the outer tube 200 (i.e., the upper end of the isolation tube 300), and a plurality of flushing holes 301 are arranged at intervals on the circumference of the isolation tube 300, and the plurality of flushing holes 301 are all connected to the installation groove. In the embodiment of the present application, the plurality of flushing holes 301 may be arranged at equal intervals on the circumference of the isolation tube 300, and the height of the inner end of each flushing hole 301 may be higher than the height of its outer end, so that the flushing hole 301 is arranged obliquely, and the flushing liquid injected from the flushing hole 301 is sprayed upward.
[0046] Combination Figure 1-Figure 4 The opening and closing body 400 is movably arranged in the installation groove of the isolation tube 300, and the switch assembly 500 is slidably arranged in the outer tube 200. By operating the switch assembly 500 to slide in the outer tube 200, the opening and closing body 400 can be controlled to block or open the multiple connecting holes. Specifically, when the switch assembly 500 is operated to slide to the first position in the outer tube 200, the opening and closing body 400 moves to the inner end of the multiple flushing holes 301 on the isolation tube 300 to block the multiple flushing holes 301 on the isolation tube 300, so that the flushing liquid cannot enter the inner part of the outer tube 200 ( Figure 3 When the operating switch assembly 500 slides to the second position in the outer tube 200, the opening and closing body 400 moves away from the inner ends of the plurality of flushing holes 301 on the isolation tube 300 to open the plurality of flushing holes 301 on the isolation tube 300, so that the flushing liquid enters the interior of the outer tube 200 ( Figure 2 and Figure 4 shown).
[0047] Combination Figure 1 The opening and closing body 400 includes a sliding sleeve 401, a connecting sleeve 402 and a blocking piece 403 which are connected in sequence along the vertical direction, wherein the sliding sleeve 401 is detachably and slidably connected in the outer tube 200, the connecting sleeve 402 is slidably connected in the isolation tube 300, and a connecting hole corresponding to the flushing hole 301 is provided on the side wall of the connecting sleeve 402, and the blocking piece 403 can block the flushing hole 301. By operating the sliding sleeve 401 to slide in the outer tube 200, the corresponding connecting hole and the flushing hole 301 can be connected, or the blocking piece 403 can block the flushing hole 301.
[0048] Specifically, combined Figure 1 The sliding sleeve 401 and the outer tube 200 can be connected by a plurality of shear pins 900, and the two are fixedly assembled. In actual implementation, a force can be applied to the sliding sleeve 401 to break the shear pins 900 between the sliding sleeve 401 and the outer tube 200, so that the sliding sleeve 401 can be slidably arranged in the outer tube 200, thereby driving the opening and closing body 400 to move as a whole, so as to open or block the flushing hole 301.
[0049] Combination Figure 1A support protrusion 101 may be provided on the inner wall of the joint 100, and one end of the sliding sleeve 401 facing away from the blocking member 403 extends into the joint 100, and a plurality of support blocks 404 that can be suspended on the support protrusion 101 are arranged at intervals on the outer peripheral surface of the sliding sleeve 401.
[0050] The above-mentioned support protrusion 101 is preferably annular, which can be integrally formed, welded or screwed to the inner wall of the joint 100, and the multiple support blocks 404 are arranged at intervals on the outer peripheral surface of the sliding sleeve 401. The multiple support blocks 404 can form a claw structure. When a force is applied to the sliding sleeve 401, the multiple support blocks 404 shrink inward to separate from the support protrusion 101, so that the sliding sleeve 401 moves downward and is slidably set in the outer tube 200.
[0051] Figure 6 for Figure 1 The schematic diagram of the sliding sleeve in FIG. Figure 1 as well as Figure 6 The angle a between the end face of the support block 404 facing the support protrusion 101 (i.e., the lower end face of the support block 404) and the outer peripheral surface of the support block 404 is an acute angle, that is, the lower end face of the support block 404 is a guide slope, and the support block 404 can be separated from the support protrusion 101 along the guide slope to facilitate operation.
[0052] Combination Figure 1 as well as Figure 6 The angle b between the end face of the support block 404 facing away from the support protrusion 101 (i.e., the upper end face of the support block 404) and the outer peripheral surface of the support block 404 is also an acute angle, that is, the upper end face of the support block 404 is also a guide slope. When the operating sleeve 401 moves upward, the support block 404 can be retracted from the lower end of the support protrusion 101 along the guide slope to facilitate the sliding upward operation.
[0053] Specifically, the angles of the two acute angles can be set between 30° and 60°, and can be set accordingly according to actual construction, and are not limited here.
[0054] In the embodiment of the present application, the first position refers to the position where the support block 404 is hung on the support protrusion 101 and the switch assembly 500 is located. At this time, the switch assembly 500 is fixedly arranged in the outer tube 200 to keep the flushing hole 301 closed.
[0055] It should be noted that the support protrusions 101 may also be arranged at intervals, that is, the support protrusions 101 may be arranged corresponding to the support blocks 404, and when a force is applied to the sliding sleeve 401, the support blocks 404 may be separated from the support protrusions 101. In this arrangement, since the support protrusions 101 are arranged at intervals, when the sliding sleeve 401 does not need to move, the support blocks 404 may be separated from the gaps between the corresponding support protrusions 101. In order to avoid this phenomenon, the support protrusions 101 are preferably arranged in an annular shape.
[0056] Combination Figure 1 A limiting protrusion 102 may also be provided on the inner wall of the joint 100, and the limiting protrusion 102 is provided below the supporting protrusion 101. The supporting block 404 on the outer peripheral surface of the sliding sleeve 401 may also be suspended on the limiting protrusion 102. The setting of the limiting protrusion 102 is used for the downhole operation of the sand flushing pipe string, and the details may refer to the following description. The structural form of the limiting protrusion 102 may be similar to that of the supporting protrusion 101, and will not be described in detail here.
[0057] In the embodiment of the present application, the second position refers to the position where the support block 404 is hung on the limit protrusion 102 and the switch assembly 500 is located. At this time, the switch assembly 500 is fixedly arranged in the outer tube 200 and the flushing hole 301 can be kept open.
[0058] Combination Figure 1 , the end of the isolation tube 300 facing the outer tube 200 (i.e., the upper end of the isolation tube 300) has a support portion protruding from the inner wall of the outer tube 200, and the connecting sleeve 402 includes a main body 4021, a transition sleeve 4022, and a connecting body 4023 connected in sequence along the vertical direction, the main body 4021 can be assembled on the end of the outer tube 200 facing away from the isolation tube 300 (i.e., the lower end of the outer tube 200) by bolt connection, the transition sleeve 4022 abuts on the support portion, and the connecting body 4023 can be slidably connected in the isolation tube 300. When the operating switch assembly 500 slides to the second position in the outer tube 200, the transition sleeve 4022 abuts on the support portion to limit the movement of the switch assembly 500. At this time, the switch assembly 500 does not need to be operated anymore, and the flushing hole 301 can be kept open without the action of external force. Improve the reliability during flushing.
[0059] Combination Figure 1 The peripheral surface of the plugging member 403 facing one end of the outer tube 200 is conical, and the slope of the cone is not greater than the angle of the flushing pipe. This can prevent sand from sinking on the plugging member 403 without blocking the flushing liquid from entering the outer tube 200.
[0060] Combination Figure 1The switch assembly 500 includes a drive sleeve 501, which is used to connect with the oil pipe 1000 and is fixedly arranged in the sliding sleeve 401. During implementation, the oil pipe 1000 is operated to rise and fall, which can drive the drive sleeve 501 to rise and fall, thereby driving the sliding sleeve 401 fixedly connected to the drive sleeve 501 to rise and fall, and then driving the entire switch assembly 500 to rise and fall, so as to realize the opening and closing of the flushing hole 301 on the peripheral surface of the isolation pipe 300.
[0061] Combination Figure 1 One or more limiting rings 502 may be arranged on the peripheral surface of the driving sleeve 501 at intervals along its length direction. The limiting rings 502 may be assembled in the sliding sleeve 401 by interference fit to achieve a fixed connection between the two.
[0062] During implementation, more than one limiting ring 502 may be provided along the circumference of the driving sleeve 501 at intervals along its length direction. The cross-section of the limiting ring 502 may be rectangular or trapezoidal, etc., which is not limited here.
[0063] Combination Figure 1 The upper end of the driving sleeve 501 and the joint 1 are in sliding connection, and a plurality of third sealing rings 1300 may be provided between the upper end of the driving sleeve 501 and the joint 1 to keep the two in a sealed state when sliding, thereby making the switch assembly 500 and the joint 1 sealed. After the sand prevention fails in the later stage, the third sealing ring 1300 will form a seal with the oil pipe 1000 to ensure that the flushing liquid can only enter the oil pipe 1000 from the flushing hole 301 at the bottom, so as to avoid the flushing liquid directly entering the internal oil pipe 1000 from the screen pipe 600, forming an empty circulation, resulting in the sand flushing liquid being unable to carry the formation sand, forcing the liquid to enter the oil pipe from the flushing hole position, and failing to achieve the purpose of sand flushing; it can also prevent the formation sand from entering the annulus of the screen pipe and the oil pipe during backwashing, and prevent the sand from getting stuck in the oil pipe, and the phenomenon that the internal oil pipe cannot be pulled out in the later stage.
[0064] On the other hand, based on the above-mentioned sand flushing tool, an embodiment of the present application also provides a sand flushing string, which includes a hanger 1200, a screen pipe 600 and the above-mentioned sand flushing tool connected in sequence vertically. The sand flushing string also includes an oil pipe 1000, and the oil pipe 1000 is gap-arranged in the screen pipe 600. The oil pipe 1000 is connected to the switch assembly 500 of the sand flushing tool.
[0065] Specifically, the assembly relationship of the hanger 1200, the screen tube 600 and the oil pipe 1000 is the prior art and will not be described in detail here. The joint 100 of the sand flushing tool can be connected to the screen tube 600 by threaded connection, screw connection or clamping, and the drive sleeve 501 of the switch assembly 500 can also be connected to the screen tube 600 by threaded connection, screw connection or clamping, which is not limited here.
[0066] When the sand flushing string is working, the gap of the sand flushing string is assembled into the casing 1100, so that the casing 1100 and the screen tube 600 form a first annulus, and the oil pipe 1000 forms a second annulus. The first annulus and the second annulus can be connected through the openable flushing hole 301, so as to achieve the purpose of sand flushing.
[0067] During implementation, when the isolation pipe 300 is in the downhole state, the flushing hole 301 of the isolation pipe 300 is in the open state. If the pipe string is blocked by formation sand, the surface pump is turned on for circulation to backwash the sand and wash the well: the sand flushing fluid enters from the first annulus and reaches the bottom of the well. The sand flushing fluid carries the formation sand and enters the oil pipe 1000 from the flushing hole 301, flows through the inside of the hanger 1200, and returns to the surface from the oil pipe 1000 to remove the sand in the oil well, making it easier for the sand control pipe string to be lowered to the designed position.
[0068] After the oil well is cleaned and the sand control string is lowered to the designed position, the ball is thrown to press the hanger to make it set and release, and the sand control string is suspended in the casing, and the screen sleeve annulus is closed at the same time. At this time, the oil pipe 1000 is operated to lift, so that the oil pipe 1000 drives the driving sleeve 501 to descend, and the movement of the driving sleeve 501 forces the shear pin 900 between the sliding sleeve 401 and the outer tube 200 to break, and the sliding sleeve 401 is separated from the outer tube 200. The sliding sleeve 401 moves in the outer tube 200, so that the support block 404 on the sliding sleeve 401 is suspended on the support protrusion 101 of the joint 100. At this time, the switch assembly 500 is in the first position in the outer tube 200, and the opening and closing body 400 is in the sealing position. The inner ends of the multiple flushing holes 301 on the isolation tube 300 are used to block the multiple flushing holes 301 on the isolation tube 300, which can prevent the formation sand from entering the screen tube 600 from the flushing holes 301 in the later stage, resulting in failure of sand control; the oil pipe 1000 is continuously lifted up, and the oil pipe 1000 can drive the driving sleeve 501 tool to be fully lifted out of the wellhead, ensuring that the inner diameter of the screen tube 600 is consistent, which is convenient for the later sand flushing and other operations. At this time, the integrated sand flushing and sand control string is used as an ordinary sand control string for oil production;
[0069] When the sand flushing pipe fails and needs to be salvaged, the sand flushing pipe is pressed down to reopen the flushing hole 301. At this time, the well is reversely circulated and washed. Because the hanger 1200 is not unsealed and is still in a sealed state, the flushing fluid can only enter the outside of the screen 600 through the screen 600, drive the sand in the first annulus to flow, and enter the oil through the flushing hole 301, establish a circulation channel, and return to the ground. After the first annulus formation sand is washed out, the sand flushing pipe is pulled out, and the salvage pipe is lowered to unseal the hanger 1200. The salvage pipe can be lifted up to pull out all the sand control pipes at once, thereby avoiding the formation sand locking the screen 600, and the minor repair cannot be lifted and requires a major repair operation, which is a high cost technical problem.
[0070] 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0001] 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", "counterclockwise" and the like 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.
[0002] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0003] In the description of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being 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 the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0004] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.
[0005] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.
[0006] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.
Claims
1. A sand blasting tool, It is characterized in that The sand blasting tool comprises: A joint, an outer tube and an isolation tube connected in sequence in the same direction, wherein an installation groove is provided at one end of the isolation tube facing the outer tube, and a plurality of flushing holes are provided at intervals on the circumference of the isolation tube, and the plurality of flushing holes are all connected to the installation groove; An opening and closing body and a switch assembly, wherein the opening and closing body is movably arranged in the mounting groove of the isolation tube, and the switch assembly is slidably arranged in the outer tube, and the switch assembly and the joint are sealed. By manipulating the switch assembly to slide in the outer tube, the opening and closing body can be controlled to block or open the plurality of connecting holes.
2. The sandblasting tool according to claim 1, It is characterized in that The opening and closing body includes a sliding sleeve, a connecting sleeve and a blocking piece which are connected in sequence along the same direction, wherein the sliding sleeve is detachably and slidably connected to the outer tube, the connecting sleeve is slidably connected to the isolation tube, a connecting hole corresponding to the flushing hole is provided on the side wall of the connecting sleeve, and the blocking piece can block the flushing hole. By operating the sliding sleeve to slide in the outer tube, the corresponding connecting hole and the flushing hole can be connected, or the blocking piece can block the flushing hole.
3. The sandblasting tool according to claim 2, It is characterized in that The peripheral surface of the blocking member facing one end of the outer tube is tapered.
4. The sandblasting tool according to claim 2, It is characterized in that The isolation tube has a support portion protruding from the inner wall of the outer tube at one end facing the outer tube. The connecting sleeve includes a main body, a transition sleeve and a connector connected in sequence along the same direction. The transition sleeve can be abutted against the support portion, and the connector is slidably connected in the isolation tube.
5. The sand blasting tool according to any one of claims 2 to 4, It is characterized in that A supporting protrusion is provided on the inner wall of the joint; One end of the sliding sleeve facing away from the blocking member extends into the joint, and a plurality of support blocks which can be suspended on the support protrusions are arranged at intervals on the outer circumference of the sliding sleeve.
6. The sand blasting tool according to claim 5, It is characterized in that An angle between an end surface of the support block facing the support protrusion and an outer peripheral surface of the support block is an acute angle.
7. The sand blasting tool according to claim 6, It is characterized in that An angle between an end surface of the support block facing away from the support protrusion and an outer peripheral surface of the support block is an acute angle.
8. The sand blasting tool according to claim 5, It is characterized in that A limiting protrusion is also arranged on the inner wall of the joint, and the limiting protrusion is arranged between the supporting protrusion and the isolation pipe, and the supporting block can be operably suspended on the limiting protrusion.
9. The sandblasting tool according to any one of claims 2 to 4 and 6 to 8, It is characterized in that The switch assembly comprises: The driving sleeve is used for connecting with the oil pipe, and the driving sleeve is fixedly arranged in the sliding sleeve.
10. An integrated sand flushing and sand control column, It is characterized in that The integrated sand flushing and control pipe string comprises: A hanger, a screen pipe and a sand flushing tool according to any one of claims 1 to 9 connected in sequence in the same direction; An oil pipe is arranged in the screen tube, and the oil pipe is connected to a switch assembly of the sand flushing tool.