Sand control non-magnetic hydraulic oscillator

Abstract

This invention provides a sand-proof, non-magnetic hydraulic oscillator, relating to the technical field of hydraulic oscillators. The sand-proof, non-magnetic hydraulic oscillator includes an upper connector, one end of which is fitted with the oscillator body. A rotating impeller drives a rotating connecting shaft, which in turn drives a conveying auger. The conveying auger, in turn, drives a rotating scraper. The rotating scraper agitates the sand adhering to the surface of the sand-blocking filter, preventing a large amount of sand from accumulating on the filter surface. After agitating the sand into the liquid medium, the conveying auger's spiral pushing direction—from the sand-blocking filter towards the rotating impeller—causes the liquid medium containing a large amount of sand to move away from the filter, increasing the sand's fluidity and effectively preventing clogging of the filter. This then drives the motor, preventing the accumulation of sand and gravel impurities in the medium between the rotor and stator after drilling stops, thus solving the problems of difficulty in restarting and jamming during construction.

Description

Technical Field

[0001] This invention relates to the field of hydraulic oscillator technology, specifically to a sand-resistant, non-magnetic hydraulic oscillator. Background Technology

[0002] With the development of the petroleum industry, oilfield drilling has gradually shifted from directional wells to horizontal wells. However, during horizontal well drilling, the weight of the drill string itself causes excessive friction between the drill string and the wellbore, severely impacting the drilling speed and even preventing the drill string from applying pressure to the drill bit. Therefore, reducing friction, minimizing stuck pipe incidents, increasing dynamic drilling pressure, and improving drilling efficiency are urgent problems that need to be solved in current drilling engineering. Research has found that the mud pressure changes periodically as it passes through the drill string, causing the drill string to experience periodic axial impact forces. This results in vibration of the drill string during drilling, thus reducing friction between the drill string and the wellbore, improving the effectiveness of drilling pressure transmission, enhancing control of the tool face, and ultimately achieving the goals of increasing drilling speed and saving drilling costs.

[0003] Currently, the corresponding tools developed both domestically and internationally include: impactors, vertical drilling tools, rotary guide tools, hydraulic boosters, drag reduction tools, and oscillators. These tools reduce friction to some extent; however, their functions are relatively limited, and their technical performance and quality are still at a low level. Therefore, people have developed non-magnetic hydraulic oscillators. The technical performance and quality of non-magnetic hydraulic oscillators have been significantly improved. However, existing non-magnetic hydraulic oscillators cause sand and gravel impurities in the medium to accumulate between the rotor and stator after drilling stops when the liquid drives the motor, resulting in difficulties in restarting and jamming during construction. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a sand-resistant, non-magnetic hydraulic oscillator, which solves the defects and deficiencies in existing technologies.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution: a sand-proof non-magnetic hydraulic oscillator, comprising an upper connector, an oscillator body installed at one end of the upper connector, a lower connector installed at the end of the oscillator body away from the upper connector, and a sand-proof clamping device connected to the end of the upper connector away from the oscillator body.

[0008] The sand-proof clamp device includes a sand-proof mounting shell. One end of the sand-proof mounting shell is fixedly connected to a threaded connecting ring, which is connected to the inlet of the upper connector. A sand-blocking filter screen is fixedly connected to the inner wall of the sand-proof mounting shell, and the sand-blocking filter screen is located near the threaded connecting ring. An internal mounting shell is fixedly connected to the inner wall of the sand-proof mounting shell. A rotating connecting shaft is rotatably connected to the side of the internal mounting shell away from the sand-blocking filter screen. One end of the rotating connecting shaft extends to the outside of the internal mounting shell and is fixedly connected to a rotating impeller. The other end of the rotating connecting shaft is fixedly connected to a conveying auger, and a scraping assembly is connected to the end of the conveying auger away from the rotating connecting shaft.

[0009] Preferably, the inner wall of the upper connector away from the oscillator body is provided with a threaded connection groove, and the threaded connection ring is threadedly connected inside the threaded connection groove.

[0010] Preferably, the outer surface of the upper connector is provided with a first mounting groove, the inner wall of the first mounting groove is provided with a plurality of second locking holes, one end of the sandproof mounting shell is provided with a plurality of first locking holes, and a locking bolt is threadedly connected between the first locking hole and the second locking hole.

[0011] Preferably, the scraping assembly includes a mounting connecting rod fixedly connected to the end of the conveying auger away from the rotating connecting shaft, a sleeve block fixedly connected to the end of the mounting connecting rod away from the conveying auger, a plurality of rotating scrapers fixedly connected to the outer surface of the sleeve block, the rotating scrapers being in contact with one side of the sand-blocking filter screen, and the spiral pushing direction of the conveying auger being from the sand-blocking filter screen towards the rotating impeller.

[0012] Preferably, the side wall of the built-in mounting housing is provided with multiple liquid inlets, which are located near the sand filter screen. A liquid inlet channel is formed between the outer side wall of the built-in mounting housing and the inner side wall of the upper connector, and the liquid inlet channel is connected to the multiple liquid inlets.

[0013] Preferably, a plurality of sand discharge pipes are fixedly connected to the outer surface of the built-in mounting housing. The plurality of sand discharge pipes are located near the rotating impeller. The end of the sand discharge pipe away from the built-in mounting housing extends to the outside of the sand-proof mounting shell. A one-way valve is provided on the outer surface of the sand-proof mounting shell.

[0014] Preferably, the outer surface of the sandproof casing is provided with a second mounting groove, and the sand discharge pipe is located inside the second mounting groove.

[0015] Preferably, the built-in mounting housing is located on the left side of the sand-blocking filter.

[0016] (III) Beneficial Effects

[0017] This invention provides a sand-resistant, non-magnetic hydraulic oscillator. It has the following beneficial effects:

[0018] 1. In this invention, a rotating impeller drives a rotating connecting shaft, which in turn drives a conveying auger. The conveying auger, in turn, drives a rotating scraper. The rotating scraper agitates the sand adhering to the surface of the sand-blocking filter, preventing a large amount of sand from accumulating on the filter surface. After the sand is agitated into the liquid medium, the conveying auger's spiral pushing direction is from the sand-blocking filter towards the rotating impeller, causing the liquid medium containing a large amount of sand to move away from the filter, increasing the sand's fluidity and effectively preventing clogging of the filter. This then drives the motor, preventing the accumulation of sand and gravel impurities in the medium between the rotor and stator after drilling stops, thus solving the problems of difficulty in restarting and jamming during construction.

[0019] 2. In this invention, the sand-proof clip device is connected by the direction of thread rotation, and then fixed again by locking bolts, which ensures the stability of the connection and also facilitates disassembly later. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the main structure of the oscillator of the present invention;

[0022] Figure 3 This is a front view of the present invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of the sand-proof outer shell of the present invention;

[0025] Figure 6 This is a schematic diagram of the built-in mounting housing structure of the present invention.

[0026] The components are as follows: 1. Upper connector; 2. Vibrator body; 3. Lower connector; 4. Sandproof outer shell; 5. First locking hole; 6. Second locking hole; 7. Locking bolt; 8. First mounting groove; 9. Threaded connecting ring; 10. Threaded connecting groove; 11. Sand-blocking filter screen; 12. Internal mounting housing; 13. Rotary connecting shaft; 14. Rotary impeller; 15. Conveying auger; 16. Mounting connecting rod; 17. Rotary scraper; 18. Liquid inlet; 19. Sand discharge pipe; 20. Second mounting groove; 21. Liquid inlet channel. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example:

[0029] like Figure 1-6 As shown, this embodiment of the invention provides a sand-proof non-magnetic hydraulic oscillator, including an upper connector 1, an oscillator body 2 installed at one end of the upper connector 1, a lower connector 3 installed at the end of the oscillator body 2 away from the upper connector 1, and a sand-proof clip device connected to the end of the upper connector 1 away from the oscillator body 2.

[0030] The sand-proof device includes a sand-proof mounting shell 4. A threaded connecting ring 9 is fixedly connected to one end of the sand-proof mounting shell 4. The threaded connecting ring 9 is connected to the inlet of the upper connector 1. A threaded connecting groove 10 is formed on the inner wall of the end of the upper connector 1 away from the oscillator body 2. The threaded connecting ring 9 is threaded into the inside of the threaded connecting groove 10. A first mounting groove 8 is formed on the outer surface of the upper connector 1. Multiple second locking holes 6 are formed through the inner wall of the first mounting groove 8. Multiple first locking holes 5 are formed at one end of the sand-proof mounting shell 4. The first locking holes 5 are locked with the second locking holes 6. The threaded connection between holes 6 is secured by locking bolts 7. First, the anti-sand clamping device is connected by the direction of thread rotation, and then it is fixed again by locking bolts 7, which ensures the stability of the connection. The liquid medium enters the liquid inlet channel 21 through the anti-sand enclosure 4, and then enters the interior of the built-in mounting housing 12 through multiple liquid inlets 18. After being filtered by the sand baffle 11, the motor is driven, which avoids the accumulation of sand and gravel impurities in the medium between the rotor and stator after the drilling stops, and solves the disadvantages of difficulty in restarting and jamming during construction.

[0031] A sand-blocking filter screen 11 is fixedly connected to the inner wall of the sand-proof mounting housing 4. The sand-blocking filter screen 11 is located near the threaded connecting ring 9. An internal mounting housing 12 is fixedly connected to the inner wall of the sand-proof mounting housing 4. A rotating connecting shaft 13 is rotatably connected to the side of the internal mounting housing 12 away from the sand-blocking filter screen 11. One end of the rotating connecting shaft 13 extends to the outside of the internal mounting housing 12 and is fixedly connected to a rotating impeller 14. A conveying auger 15 is fixedly connected to the other end of the rotating connecting shaft 13. A scraping assembly is connected to the end of the conveying auger 15 away from the rotating connecting shaft 13. The scraping assembly includes a mounting connecting rod 1 fixedly connected to the end of the conveying auger 15 away from the rotating connecting shaft 13. 6. A sleeve block is fixedly connected to the end of the connecting rod 16 away from the conveying auger 15. Multiple rotating scrapers 17 are fixedly connected to the outer surface of the sleeve block. The rotating scrapers 17 are attached to one side of the sand-blocking filter screen 11. The spiral pushing direction of the conveying auger 15 is from the sand-blocking filter screen 11 to the rotating impeller 14. The conveying auger 15 rotates with the rotating scrapers 17. When the rotating scrapers 17 rotate, they agitate the sand attached to the surface of the sand-blocking filter screen 11, preventing a large amount of sand from accumulating on the surface of the sand-blocking filter screen 11. After agitating the sand into the liquid medium, the liquid medium containing a large amount of sand moves away from the sand-blocking filter screen 11, increasing the fluidity of the sand.

[0032] The side wall of the built-in mounting housing 12 is provided with multiple liquid inlets 18, which are located near the sand filter screen 11. A liquid inlet channel 21 is formed between the outer side wall of the built-in mounting housing 12 and the inner side wall of the upper connector 1. The liquid inlet channel 21 communicates with the multiple liquid inlets 18. Multiple sand discharge pipes 19 are fixedly connected to the outer surface of the built-in mounting housing 12. The multiple sand discharge pipes 19 are located near the rotating impeller 14. The end of the sand discharge pipe 19 away from the built-in mounting housing 12 extends to the outside of the sand-proof mounting shell 4. A one-way valve is provided on the outer surface of the sand-proof mounting shell 4. A second mounting groove 20 is provided on the outer surface of the sand-proof mounting shell 4. The sand discharge pipe 19 is located inside the second mounting groove 20. The built-in mounting housing 12 is located to the left of the sand filter screen 11.

[0033] Working principle:

[0034] The liquid medium enters the inlet channel 21 through the sand-proof housing 4, and then enters the interior of the built-in mounting housing 12 through multiple inlets 18. After being filtered by the sand-blocking filter screen 11, it drives the motor, which avoids the accumulation of sand and gravel impurities in the medium between the rotor and stator after the drilling stops, thus solving the problems of difficulty in restarting and jamming during construction.

[0035] Over time, a large amount of sand will accumulate on the sand-blocking filter screen 11 under normal circumstances. Furthermore, because the liquid medium flows towards the sand-blocking filter screen 11, the sand on the screen compresses the filter holes, reducing filtration efficiency. In this application, after the liquid medium enters the sand-blocking housing 4, it will flush the rotating impeller 14, causing the rotating impeller 14 to rotate, which in turn rotates the rotating connecting shaft 13. The rotating connecting shaft 13 then rotates the conveying auger 15, which in turn rotates the rotating scraper 17. When rotating, the sand adhering to the surface of the sand filter screen 11 is stirred to prevent a large amount of sand from accumulating on the surface of the sand filter screen 11. After the sand is stirred into the liquid medium, since the spiral pushing direction of the conveying auger 15 is from the sand filter screen 11 to the rotating impeller 14, the liquid medium containing a large amount of sand moves away from the sand filter screen 11, increasing the fluidity of the sand and effectively preventing the sand filter screen 11 from clogging. The one-way valve on the sand discharge pipe 19 is opened periodically to discharge the sand inside the sandproof housing 4.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sand-resistant, non-magnetic hydraulic oscillator, comprising an upper connector (1), characterized in that: One end of the upper connector (1) is equipped with an oscillator body (2), and the end of the oscillator body (2) away from the upper connector (1) is equipped with a lower connector (3). The end of the upper connector (1) away from the oscillator body (2) is connected to a sand-proof clip device. The sand-proof device includes a sand-proof mounting shell (4), one end of which is fixedly connected to a threaded connecting ring (9), which is connected to the inlet of the upper connector (1). A sand-blocking filter (11) is fixedly connected to the inner wall of the sand-proof mounting shell (4), which is located near the threaded connecting ring (9). An internal mounting shell (12) is fixedly connected to the inner wall of the sand-proof mounting shell (4). A rotating connecting shaft (13) is rotatably connected to the side of the internal mounting shell (12) away from the sand-blocking filter (11). One end of the rotating connecting shaft (13) extends to the outside of the internal mounting shell (12) and is fixedly connected to a rotating impeller (14). The other end of the rotating connecting shaft (13) is fixedly connected to a conveying auger (15), and the end of the conveying auger (15) away from the rotating connecting shaft (13) is connected to a scraping assembly. The upper connector (1) has a threaded connection groove (10) on the inner wall of the end away from the oscillator body (2), and the threaded connection ring (9) is threadedly connected to the inside of the threaded connection groove (10); The outer surface of the upper connector (1) is provided with a first mounting groove (8), and the inner wall of the first mounting groove (8) is provided with a plurality of second locking holes (6). One end of the sandproof housing (4) is provided with a plurality of first locking holes (5), and a locking bolt (7) is threaded between the first locking hole (5) and the second locking hole (6). The scraping assembly includes a mounting connecting rod (16) fixedly connected to one end of the conveying auger (15) away from the rotating connecting shaft (13). A sleeve block is fixedly connected to one end of the mounting connecting rod (16) away from the conveying auger (15). A plurality of rotating scrapers (17) are fixedly connected to the outer surface of the sleeve block. The rotating scrapers (17) are in contact with one side of the sand-blocking filter screen (11). The spiral pushing direction of the conveying auger (15) is from the sand-blocking filter screen (11) towards the rotating impeller (14). The side wall of the built-in mounting housing (12) is provided with a plurality of liquid inlets (18), which are located near the sand filter screen (11). A liquid inlet channel (21) is formed between the outer side wall of the built-in mounting housing (12) and the inner side wall of the upper connector (1), and the liquid inlet channel (21) is connected to the plurality of liquid inlets (18). Multiple sand discharge pipes (19) are fixedly connected to the outer surface of the built-in mounting housing (12). The multiple sand discharge pipes (19) are located near the rotating impeller (14). The end of the sand discharge pipe (19) away from the built-in mounting housing (12) extends to the outside of the sand-proof mounting shell (4). A one-way valve is provided on the outer surface of the sand-proof mounting shell (4).

2. The sand-resistant, non-magnetic hydraulic oscillator according to claim 1, characterized in that: The outer surface of the sandproof casing (4) is provided with a second mounting groove (20), and the sand discharge pipe (19) is located inside the second mounting groove (20).

3. The sand-resistant, non-magnetic hydraulic oscillator according to claim 1, characterized in that: The built-in mounting housing (12) is located to the left of the sand filter (11).

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