Sand washing and fishing device for directional well

Abstract

The utility model belongs to the technical field of underground salvage devices, and particularly relates to a directional well sand washing salvage device which comprises a salvage pipe, a middle flow guide sleeve is installed in the salvage pipe, a water outlet hole and a water inlet hole are formed in the outer wall of the salvage pipe, and a sand storage cavity is formed between the middle flow guide sleeve and the salvage pipe. A separation assembly for separating sand grains from water is arranged in the sand storage cavity; the filtering mechanism comprises a collecting box mounted on one side of the water outlet hole; through the arrangement of the filtering mechanism, a mixture in the circulating process can be filtered, sand grains in the mixture can be effectively collected, the situation that part of the sand grains and the mixture are easily and synchronously discharged is avoided, the sand grain collecting effect of the device is improved, the sand grains precipitated at the bottom of a well can be completely cleaned, and the sand grains can be recycled. And meanwhile, the problem that equipment abrasion is aggravated due to continuous circulation of sand grains in an existing device is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of downhole fishing devices, and in particular relates to a directional well sand flushing fishing device. Background Art

[0002] Directional well sand flushing and salvage device is a device specially used for cleaning waste and sediment in directional wells in oil fields. It is used to suck sand, mud, gravel and other materials at the bottom of the well and then send them to the surface treatment system. At the same time, the directional well sand flushing and salvage device can effectively clean the accumulation at the bottom of the well, keep the wellbore clean, and help improve the well's productivity and production efficiency.

[0003] A Chinese patent with announcement number CN219101279U discloses a salvage device for bailing sand in oil and gas wells. The utility model adds a salvage device with simple structure, low manufacturing cost and convenient operation to the existing drilling tool. The salvage device forms a relatively sealed area at the bottom of the well, and then uses high-pressure liquid to evenly mix the sand particles at the bottom of the well in the liquid to form a mixed fluid. After the mixed fluid enters the salvage device of the utility model, the sand particles carried in the fluid are retained inside the salvage device, and the liquid flows out from another outlet of the salvage device. It not only has the advantages of high sand bailing efficiency, but also has the advantages of clean and thorough sand bailing. , simple structure, easy operation, low manufacturing cost, easy implementation and other advantages; however, when the above-mentioned salvaging device for oil and gas well sand is used, high-pressure liquid is used to impact the sand fragments, so that the sand fragments are effectively separated in the body, thereby completing the collection of the sand particles. However, during the circulation process, when water flows out of the outer wall of the water outlet hole, some sand particles are easily discharged synchronously with the mixture, which reduces the effect of sand collection, making it difficult to completely clean up the sand particles deposited at the bottom of the well, affecting the production efficiency and capacity of the directional well. At the same time, the continuous circulation of sand particles aggravates the wear of the equipment, thereby reducing the service life of the existing device.

[0004] In order to solve the above problems, a directional well sand flushing and fishing device is proposed in the present application. Utility Model Content

[0005] In order to solve the problems raised in the above background technology, the utility model provides a directional well sand flushing and fishing device, which has the characteristic of conveniently filtering the mixed circulating water.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] Directional well sand flushing and fishing device, including:

[0008] A salvage pipe, wherein an intermediate guide sleeve is installed inside the salvage pipe, and a water outlet hole and a water inlet hole are opened on the outer wall of the salvage pipe, a sand storage cavity is formed between the intermediate guide sleeve and the salvage pipe, and a separation component for separating sand particles from water is arranged in the sand storage cavity;

[0009] A filtering mechanism is connected to the water outlet and is used to filter the mixture discharged from the water outlet again. The filtering mechanism includes a collecting box installed on one side of the water outlet and a plurality of filtering holes opened on one side of the collecting box. The bottom of the collecting box is connected to an expansion bucket.

[0010] As a preferred embodiment of the directional well sand flushing and salvage device of the utility model, a cleaning mechanism for cleaning the multiple filter holes is provided in the collection box, and the cleaning mechanism includes an electric push rod fixed on the top of the collection box and a scraper rod arranged inside the collection box, the telescopic end of the electric push rod is connected to the scraper rod, and the scraper rod is in contact with the multiple filter holes.

[0011] As a preferred embodiment of the directional well sand flushing and salvage device of the utility model, a stirring mechanism for stirring the sand inside the expansion bucket is arranged inside the collecting box, and the stirring mechanism includes a driving motor fixed to the top of the collecting box and a transmission shaft arranged inside the collecting box, the transmission shaft is connected to the output end of the driving motor, and the transmission shaft extends to the interior of the expansion bucket and is provided with a mixing mechanism.

[0012] As a preferred embodiment of the directional well sand flushing and salvaging device of the utility model, the mixing mechanism includes a plurality of stirring blocks arranged inside the expansion bucket and a plurality of connecting rods fixed to the outer wall of the transmission shaft, and the plurality of connecting rods are fixed to the plurality of stirring blocks.

[0013] As a preferred embodiment of the directional well sand flushing and salvage device of the utility model, a disassembly mechanism for disassembling the expansion bucket is provided between the expansion bucket and the collection box, and the disassembly mechanism includes a reinforcement rod fixed to the outer wall of the expansion bucket and a bolt screwed to one side of the collection box, and the bolt is screwed to the reinforcement rod.

[0014] As a preferred embodiment of the directional well sand flushing and salvage device of the utility model, a protective mechanism for protecting the electric push rod and the drive motor is arranged on the top of the collection box, and the protective mechanism includes a protective shell fixed on the top of the collection box and a protective cavity opened inside the protective shell, and the electric push rod and the drive motor are both arranged in the protective cavity.

[0015] As a preferred embodiment of the directional well sand flushing and salvage device of the utility model, the separation assembly includes a rubber sealing ring installed on the outer wall of the salvage pipe and a sealing liquid filling pipe and a filter seat arranged inside the sand storage chamber, the rubber sealing ring is connected to the sealing liquid filling pipe, and a lower joint connected to the middle guide sleeve is installed at the bottom of the sand storage chamber.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model can filter the mixture in the circulation process by setting the filtering mechanism, so that the sand inside the mixture can be effectively collected, and the situation that some sand is easily discharged synchronously with the mixture is avoided, and the effect of the device on sand collection is increased, so that the sand precipitated at the bottom of the well can be completely cleaned up, and at the same time solves the problem of aggravated equipment wear caused by the continuous circulation of sand in the existing device, thereby extending the service life of the device;

[0018] 2. The utility model can stir the collected sand particles by setting a stirring mechanism, which can ensure that the sand particles remain loose during the discharge process, avoid the situation where the sand particles adhere to the inner wall of the expansion bucket and are difficult to discharge, and will not clog the expansion bucket, thereby maintaining the smooth operation of the device, while reducing the operational safety hazards caused by sand accumulation, helping to improve operational safety and reduce the occurrence of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 For this utility model Figure 1 A cross-sectional view of

[0022] Figure 3 For this utility model Figure 2 Side view of

[0023] Figure 4 For this utility model Figure 2 The structural diagram of the filtering mechanism;

[0024] Figure 5 For this utility model Figure 4 A in the enlarged view;

[0025] In the figure: 1. Salvage pipe; 2. Rubber sealing ring; 3. Filter mechanism; 4. Middle guide sleeve; 5. Lower joint; 6. Stirring mechanism;

[0026] 31. Collection box; 32. Protective shell; 33. Electric push rod; 34. Scraping rod; 35. Expansion bucket;

[0027] 61. Transmission shaft; 62. Stirring block; 63. Driving motor; 64. Reinforcement rod; 65. Bolt. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The utility model provides Figure 1 and Figure 2 The directional well sand flushing and salvaging device shown comprises: a salvage pipe 1, an intermediate guide sleeve 4 is installed inside the salvage pipe 1, and a water outlet and a water inlet are opened on the outer wall of the salvage pipe 1, a sand storage cavity is formed between the intermediate guide sleeve 4 and the salvage pipe 1, and a separation component for separating sand particles from water is arranged in the sand storage cavity, and an upper conical guide sleeve and a lower conical guide sleeve are connected to the upper and lower ends of the intermediate guide sleeve 4 respectively.

[0030] Furthermore, the separation component includes a rubber sealing ring 2 installed on the outer wall of the salvage pipe 1 and a sealing liquid filling pipe and a filter seat arranged inside the sand storage chamber. The rubber sealing ring 2 is connected to the sealing liquid filling pipe. A lower joint 5 connected to the intermediate guide sleeve 4 is installed at the bottom of the sand storage chamber. The structures and working principles of the rubber sealing ring 2, the sealing liquid filling pipe, the filter seat and the lower joint 5 are all prior arts. For details, please refer to the comparative document (announcement number CN219101279U, named "Salvage Device for Salvaging Sand in Oil and Gas Wells"), which will not be elaborated here.

[0031] As can be seen from the above, when in use, the salvage pipe 1 is first connected to the existing drilling tool, and the drilling tool is enabled to drive the salvage device to move, and the high-pressure liquid equipped with the drilling tool flows into the middle guide sleeve 4 through the upper conical guide sleeve. When the high-pressure liquid passes through the upper part of the middle guide sleeve 4, part of the high-pressure liquid will enter the rubber sealing ring 2 through the sealing liquid filling pipe, so that the rubber sealing ring 2 expands under the action of the high-pressure liquid, thereby sealing the gap between the outer surface of the salvage pipe 1 and the well wall of the directional well. Through the high-pressure liquid, the broken objects at the bottom of the well can be effectively impacted, thereby forming a mixture. Through continuous impact, the mixture circulates between the water inlet, the water outlet and the sand storage chamber. Through the setting of the filter seat, the sand inside the mixture can be filtered, thereby completing the salvage operation of the sand at the bottom of the directional well.

[0032] refer to Figure 2-Figure 5 As shown, the filtering mechanism 3 is connected to the water outlet, and the filtering mechanism 3 is used to filter the mixture discharged from the water outlet again. The filtering mechanism 3 includes a collecting box 31 installed on one side of the water outlet and a plurality of filtering holes opened on one side of the collecting box 31. The bottom of the collecting box 31 is connected to an expansion bucket 35.

[0033] Through the above technical solution:

[0034] When in use, water is discharged through the water outlet hole so that the mixture enters the collecting box 31, and the sand and water inside the mixture can be effectively separated by setting multiple filter holes. By separating the sand and water from each other, the water is discharged through multiple filter holes, and the sand falls into the expansion bucket 35, so that the mixture in the circulation process can be filtered again, so that the sand inside the mixture can be effectively collected, and the situation that some sand is easily discharged synchronously with the mixture is avoided, which increases the effect of the device on sand collection, so that the sand settled at the bottom of the well can be completely cleaned, thereby increasing the production efficiency and capacity of the directional well, and at the same time solves the problem of aggravated equipment wear caused by continuous circulation of sand in the existing device, thereby extending the service life of the device.

[0035] Furthermore, a cleaning mechanism for cleaning the multiple filter holes is provided in the collection box 31, and the cleaning mechanism includes an electric push rod 33 fixed on the top of the collection box 31 and a scraper rod 34 provided inside the collection box 31, and the telescopic end of the electric push rod 33 is connected to the scraper rod 34, and the scraper rod 34 fits the multiple filter holes. Based on this, the electric push rod 33 drives the scraper rod 34 to move, and through the movement of the scraper rod 34, the sand particles left inside the multiple filter holes can be effectively scraped to avoid the blockage of the multiple filter holes, thereby increasing the fluidity of the device.

[0036] Furthermore, a disassembly mechanism for disassembling the expansion bucket 35 is provided between the expansion bucket 35 and the collection box 31, and the disassembly mechanism includes a reinforcing rod 64 fixed to the outer wall of the expansion bucket 35 and a bolt 65 screwed to one side of the collection box 31, and the bolt 65 is screwed to the reinforcing rod 64. Based on this, the reinforcing rod 64 can be fixed to the bottom of the collection box 31 by the bolt 65, and it can also be separated from the collection box 31, so that the user can quickly disassemble the expansion bucket 35.

[0037] In addition, refer to Figure 2-Figure 5 As shown, the interior of the collection box 31 is provided with a stirring mechanism 6 for stirring the sand inside the expansion bucket 35. The stirring mechanism 6 includes a driving motor 63 fixed to the top of the collection box 31 and a transmission shaft 61 arranged inside the collection box 31. The transmission shaft 61 is connected to the output end of the driving motor 63, and the transmission shaft 61 extends to the interior of the expansion bucket 35 and is provided with a mixing mechanism.

[0038] Through the above technical solution:

[0039] When in use, the drive motor 63 drives the transmission shaft 61 to start rotating, and the rotation of the transmission shaft 61 drives the mixing mechanism to move, so that the collected sand can be stirred, ensuring that the sand remains loose during the discharge process, avoiding the situation where the sand adheres to the inner wall of the expansion bucket 35 and is difficult to discharge, and will not easily clog the expansion bucket 35, thereby maintaining the smooth operation of the device, while reducing the operational safety hazards caused by sand accumulation, helping to improve operational safety and reduce the occurrence of accidents.

[0040] Regarding the above-mentioned hybrid mechanism, Figure 4 As shown, the mixing mechanism includes a plurality of stirring blocks 62 disposed inside the expansion bucket 35 and a plurality of connecting rods fixed to the outer wall of the transmission shaft 61, and the plurality of connecting rods are fixed to the plurality of stirring blocks 62. Based on this, the rotation of the transmission shaft 61 drives the plurality of connecting rods to rotate, and the rotation of the plurality of connecting rods drives the plurality of stirring blocks 62 to rotate, so that the sand particles collected inside the expansion bucket 35 can be mixed.

[0041] Furthermore, a protective mechanism for protecting the electric push rod 33 and the drive motor 63 is provided on the top of the collection box 31. The protective mechanism includes a protective shell 32 fixed to the top of the collection box 31 and a protective cavity opened inside the protective shell 32. The electric push rod 33 and the drive motor 63 are both arranged in the protective cavity. Based on this, through the setting of the protective shell 32, it is possible to protect the electric push rod 33 and the drive motor 63 to prevent the mixture from causing damage to the electric push rod 33 and the drive motor 63, thereby increasing the safety of the device.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Directional well sand flushing and salvage device, characterized in that: include: A salvage pipe (1), wherein an intermediate flow guide sleeve (4) is installed inside the salvage pipe (1), and a water outlet hole and a water inlet hole are opened on the outer wall of the salvage pipe (1), a sand storage cavity is formed between the intermediate flow guide sleeve (4) and the salvage pipe (1), and a separation component for separating sand particles from water is arranged in the sand storage cavity; A filtering mechanism (3), the filtering mechanism (3) being in communication with the water outlet and used for re-filtering the mixture discharged from the water outlet, the filtering mechanism (3) comprising a collecting box (31) mounted on one side of the water outlet and a plurality of filtering holes provided on one side of the collecting box (31), the bottom of the collecting box (31) being connected to an expansion bucket (35).

2. The directional well sand flushing and fishing device according to claim 1, characterized in that: A cleaning mechanism for cleaning the plurality of filter holes is arranged in the collection box (31), the cleaning mechanism comprising an electric push rod (33) fixed to the top of the collection box (31) and a scraper rod (34) arranged inside the collection box (31), the telescopic end of the electric push rod (33) is connected to the scraper rod (34), and the scraper rod (34) fits the plurality of filter holes.

3. The directional well sand flushing and fishing device according to claim 1, characterized in that: The interior of the collection box (31) is provided with a stirring mechanism (6) for stirring the sand particles inside the expansion bucket (35), the stirring mechanism (6) comprising a driving motor (63) fixed to the top of the collection box (31) and a transmission shaft (61) arranged inside the collection box (31), the transmission shaft (61) being connected to the output end of the driving motor (63), and the transmission shaft (61) extending to the interior of the expansion bucket (35) and provided with a mixing mechanism.

4. The directional well sand flushing and fishing device according to claim 3, characterized in that: The mixing mechanism comprises a plurality of stirring blocks (62) arranged inside the expansion bucket (35) and a plurality of connecting rods fixed to the outer wall of the transmission shaft (61), wherein the plurality of connecting rods are fixed to the plurality of stirring blocks (62).

5. The directional well sand flushing and fishing device according to claim 1, characterized in that: A disassembly mechanism for disassembling the expansion bucket (35) is provided between the expansion bucket (35) and the collection box (31), the disassembly mechanism comprising a reinforcement rod (64) fixed to the outer wall of the expansion bucket (35) and a bolt (65) screwed to one side of the collection box (31), the bolt (65) being screwed to the reinforcement rod (64).

6. The directional well sand flushing and fishing device according to claim 3, characterized in that: A protective mechanism for protecting the electric push rod (33) and the drive motor (63) is arranged at the top of the collection box (31), the protective mechanism comprising a protective shell (32) fixed to the top of the collection box (31) and a protective cavity opened inside the protective shell (32), and the electric push rod (33) and the drive motor (63) are both arranged in the protective cavity.

7. The directional well sand flushing and fishing device according to claim 1, characterized in that: The separation assembly comprises a rubber sealing ring (2) mounted on the outer wall of a salvage pipe (1), and a sealing liquid filling pipe and a filter seat arranged inside the sand storage chamber, the rubber sealing ring (2) being connected to the sealing liquid filling pipe, and a lower joint (5) connected to an intermediate guide sleeve (4) being mounted at the bottom of the sand storage chamber.

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