A drill rod rust removal and prevention device

Abstract

The application discloses a kind of drill rod rust removal rust prevention devices, it is related to drill rod rust removal rust prevention technical field, including rack, the top of the rack is fixed with support cylinder and connecting cylinder, rotatingly connected with rotating cylinder between the support cylinder and connecting cylinder, and the inside of support cylinder and connecting cylinder is equipped with supporting mechanism, the supporting mechanism includes multiple electric transmission roller, the side of support cylinder is equipped with adjusting assembly for adjusting the distance between multiple electric transmission roller, the adjusting assembly includes adjusting cylinder rotationally arranged in the side of support cylinder, by setting adjusting cylinder, guide frame, connecting rod and guide rod, adjusting cylinder rotation drives guide frame synchronous following movement, connecting rod slides in guide frame when guide frame moves, connecting rod movement drives multiple electric transmission roller to be close to each other or to be far away from each other by guide rod, the distance between multiple electric transmission roller is adjusted, to be suitable for different specifications of drill rod, improve the range of use.

Description

Technical Field

[0001] This invention relates to the technical field of rust removal and prevention technology for drill pipes, specifically to a rust removal and prevention device for drill pipes. Background Technology

[0002] Drill pipe is a threaded steel tube used to connect drilling rig surface equipment to drilling equipment or bottom hole assembly located at the bottom of the well. Its purpose is to transport drilling mud to the drill bit and, together with the drill bit, raise, lower, or rotate the bottom hole assembly. Drill pipe must be able to withstand enormous internal and external pressures, torsion, bending, and vibration. In the oil and gas extraction and refining process, drill pipe can be reused multiple times. Drill pipe is classified into three categories: crisscross drill pipe, standard drill pipe, and heavy-duty drill pipe.

[0003] Over time, drill pipes accumulate dirt and rust on their surface. To extend their lifespan, regular rust removal and oiling are necessary. However, common rust removal and prevention equipment for drill pipes is not convenient for moving the pipe during the rust removal process. It can only remove rust from individual parts of the pipe. When different areas need rust removal, the drill pipe must be moved and flipped, and the process repeated. Furthermore, some drill pipes are quite heavy, making flipping difficult, cumbersome, and time-consuming. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a rust removal and prevention device for drill pipes.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] The present invention provides a rust removal and rust prevention device for drill pipes, comprising a frame, a support cylinder and a connecting cylinder fixed on the top of the frame, a rotating cylinder rotatably connected between the support cylinder and the connecting cylinder, and a support mechanism provided inside the support cylinder and the connecting cylinder, the support mechanism comprising multiple electric drive rollers, and an adjustment component for adjusting the distance between the multiple electric drive rollers provided on the side of the support cylinder.

[0007] The rotating cylinder is equipped with a rust removal mechanism, which includes a sand storage box fixed outside the rotating cylinder and multiple annular sand pipes. The sand storage box is equipped with a feeding cover and multiple sandblasting pumps. The rotating cylinder is equipped with multiple sets of sandblasting components. The sand storage box is connected to the multiple sets of sandblasting components through the annular sand pipes.

[0008] The top of the frame is equipped with a drive mechanism for rotating the rotating drum to perform all-around rust removal.

[0009] The connecting cylinder is equipped with a rust-prevention mechanism for preventing rust on the drill rod.

[0010] As a preferred embodiment of the present invention, the adjusting assembly includes an adjusting cylinder rotatably disposed on the side of the supporting cylinder, a plurality of guide frames are provided on the outer surface of the adjusting cylinder, and a plurality of guide rods corresponding to the electric drive roller are slidably disposed on both the supporting cylinder and the connecting cylinder, and the guide rods are connected to the electric drive rollers through elastic telescopic members, and two corresponding guide rods on the supporting cylinder and the connecting cylinder are fixedly connected by a connecting rod, and the connecting rod is slidably disposed inside the corresponding guide frame.

[0011] As a preferred embodiment of the present invention, a worm gear is fixed to the outside of the adjusting cylinder, a worm is rotatably provided on the surface of the frame to mesh with the worm gear, and a rotating plate is fixed to the end of the worm.

[0012] As a preferred embodiment of the present invention, the sandblasting assembly includes multiple mounting brackets. A double-pass pipe is fixed at the position of each mounting bracket of the connecting cylinder. The sand inlet of the double-pass pipe is connected to an annular pipe. Two sandblasting pipes are mounted on the mounting bracket. The sandblasting directions of the two sandblasting pipes are arranged one in front of the other. The inlets of the two sandblasting pipes are respectively connected to the two sand outlets of the double-pass pipe. A rotating block is fixed on the side of the mounting bracket. A rotating sleeve is rotatably mounted on the rotating block. Mounting plates are fixed at both ends of the rotating sleeve, and the rotating block and the mounting plates are connected by a torsion spring. The mounting plates are fixed to the inner wall of the connecting cylinder.

[0013] As a preferred embodiment of the present invention, a contact roller is fixed at one end of each of the multiple mounting brackets that are close to each other, and a control valve is provided on each of the two sand outlet pipes of the double-pass pipe.

[0014] As a preferred embodiment of the present invention, the driving mechanism includes a motor fixed to the surface of the frame and a rotating rod rotatably disposed on the surface of the frame. The rotating rod is fixedly connected to the output shaft of the motor, and a driving gear is fixed to the outer surface of the rotating rod. A driven gear meshing with the driving gear is fixed to the outer surface of the rotating cylinder.

[0015] As a preferred embodiment of the present invention, the rust prevention mechanism includes an annular liquid pipe fixed to the inner wall of the connecting cylinder, a liquid storage tank fixed to the surface of the frame and a liquid filling port on the liquid storage tank, a liquid pump fixed to the top of the liquid storage tank, the inlet pipe of the liquid pump penetrating the surface of the liquid storage tank and extending to below the liquid level inside the liquid storage tank, the outlet pipe of the liquid pump penetrating the surface of the connecting pipe and communicating with the annular liquid pipe, and a mixing component provided inside the liquid storage tank and the mixing mechanism being connected to the driving mechanism.

[0016] As a preferred embodiment of the present invention, a stirring rod is rotatably provided inside the liquid storage tank, and the end of the stirring rod is fixedly connected to the rotating rod.

[0017] As a preferred embodiment of the present invention, at least one partition plate is installed inside the sand storage box, which divides the inside of the sand storage box into multiple sand storage spaces, and the inlets of multiple annular sand pipes are sequentially connected to the multiple sand storage spaces.

[0018] In the above scheme, it should be noted that the electric drive roller, sandblasting pump, motor, liquid pump and controller are all electrically connected to an external controller via an external power supply.

[0019] The beneficial effects of this invention are:

[0020] 1. This type of drill pipe rust removal and prevention device, by setting an adjusting cylinder, a guide frame, a connecting rod and a guide rod, the rotation of the adjusting cylinder drives the guide frame to move synchronously. When the guide frame moves, the connecting rod slides inside the guide frame. The movement of the connecting rod drives multiple electric drive rollers to move closer or further apart through the guide rod, so as to adjust the distance between the multiple electric drive rollers to be suitable for drill pipes of different specifications and improve the application range.

[0021] 2. This drill rod rust removal and prevention device comprises a sandblasting pump, a sand storage box, a mounting frame, a sandblasting pipe, a rotating block, a rotating sleeve, a mounting plate, a double-pipe, and a torsion spring. The sandblasting pump pumps rust-removing sand from the sand storage box into the annular sand pipe. Further rust-removing sand is then sprayed from the sandblasting pipe through the double-pipe onto the drill rod surface, thus removing rust from the drill rod surface. Simultaneously, as the drill rod enters the annular pipe, rust is removed from its end face. As the drill rod continues to move, the mounting frame rotates, causing the sandblasting pipe to rotate synchronously, further removing rust from the drill rod surface. After the drill rod moves away from the mounting frame, the mounting frame returns to its original position under the action of the torsion spring, removing rust from the other end of the drill rod, achieving comprehensive rust removal for the drill rod.

[0022] 3. This type of drill pipe rust removal and prevention device, by setting up contact rollers and control valves, utilizes contact rollers to pre-contact the drill pipe during its movement, reducing friction and preventing wear caused by contact between the mounting frame or sandblasting pipe and the drill pipe. The control valves control the flow of abrasive material into different sandblasting pipes, enabling sandblasting in different directions and reducing abrasive waste.

[0023] 4. This type of drill pipe rust removal and prevention device, by setting up a motor, a rotating rod, a drive gear and a driven gear, uses the motor to drive the rotating rod to rotate, the rotating rod to drive the drive gear to rotate synchronously, and then the drive gear to mesh with the driven gear, driving the driven gear to drive the rotating cylinder to rotate, so that the rotating cylinder drives the internal sandblasting pipe to rotate synchronously, realizing the all-round grinding and rust removal of the drill pipe, making the rust removal more comprehensive.

[0024] 5. This type of drill rod rust removal and prevention device, by setting up a partition plate, divides the sand storage box into multiple sand storage spaces, which can sequentially put in sand of different fineness, and realize the process from coarse grinding to fine grinding, so as to make rust removal more thorough.

[0025] 6. This type of drill pipe rust removal and prevention device is equipped with a liquid storage tank, a liquid pump and an annular liquid pipe. The liquid pump draws out the rust-preventive liquid from the storage tank, and after the rust-preventive liquid is drawn out, it is evenly sprayed onto the surface of the drill pipe through the annular liquid pipe to achieve rust prevention of the drill pipe and delay the oxidation and rusting time of the drill pipe.

[0026] 7. This type of drill pipe rust removal and prevention device, by setting up a stirring rod, drives the stirring rod to rotate synchronously while the rotating rod rotates. The rotation of the stirring rod can stir the rust prevention liquid inside the storage tank, so that the rust prevention liquid is fully mixed and avoids the problem of unevenness caused by the accumulation of impurities. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a rust removal and prevention device for drill pipes according to the present invention;

[0029] Figure 2 This is a schematic diagram of another angle of the rust removal and prevention device for drill pipes according to the present invention;

[0030] Figure 3 This is a cross-sectional structural diagram of a portion of the rust removal and prevention device for drill pipes according to the present invention;

[0031] Figure 4 This is a schematic diagram of the support mechanism of a drill pipe rust removal and prevention device according to the present invention;

[0032] Figure 5 This is a cross-sectional structural diagram of the support cylinder of the drill pipe rust removal and rust prevention device of the present invention;

[0033] Figure 6 This is a cross-sectional structural diagram of the rotating cylinder and sand storage box of a drill pipe rust removal and rust prevention device according to the present invention;

[0034] Figure 7 This is a schematic diagram of the rust removal mechanism of a drill pipe rust removal and rust prevention device according to the present invention;

[0035] Figure 8 This is a schematic diagram of the structure of the sandblasting pipe of the drill pipe rust removal and rust prevention device of the present invention;

[0036] Figure 9 This is a schematic diagram of the contact roller structure of a drill pipe rust removal and rust prevention device according to the present invention;

[0037] Figure 10 This is a cross-sectional structural diagram of the liquid storage tank of a drill pipe rust removal and rust prevention device according to the present invention.

[0038] In the diagram: 1. Frame; 2. Support cylinder; 3. Rotating cylinder; 4. Connecting cylinder; 5. Supporting mechanism; 501. Guide rod; 502. Electric drive roller; 503. Adjusting cylinder; 504. Guide frame; 505. Connecting rod; 506. Worm gear; 507. Worm; 6. Rust removal mechanism; 601. Sand storage box; 602. Annular sand pipe; 603. Mounting plate; 604. Rotating sleeve; 605. Rotating block; 606. Mounting frame; 607. Sandblasting pipe; 608. Contact roller; 609. Double-pass pipe; 610. Separator plate; 611. Sandblasting pump; 7. Drive mechanism; 701. Driven gear; 702. Rotating rod; 703. Driven gear; 704. Motor; 8. Rust prevention mechanism; 801. Liquid storage tank; 802. Stirring rod; 803. Liquid pump; 804. Annular liquid pipe. Detailed Implementation

[0039] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0040] Example: Figures 1-5 As shown, the present invention discloses a rust removal and prevention device for drill pipes, comprising a frame 1, a support cylinder 2 and a connecting cylinder 4 fixed on the top of the frame 1, a rotating cylinder 3 rotatably connected between the support cylinder 2 and the connecting cylinder 4, and a support mechanism 5 provided inside the support cylinder 2 and the connecting cylinder 4, the support mechanism 5 including multiple electric drive rollers 502, an adjustment component for adjusting the distance between the multiple electric drive rollers 502 provided on the side of the support cylinder 2, the adjustment component including an adjustment cylinder 503 rotatably disposed on the side of the support cylinder 2, multiple guide frames 504 provided on the outer surface of the adjustment cylinder 503, multiple guide rods 501 corresponding to the electric drive rollers 502 slidably disposed on the support cylinder 2 and the connecting cylinder 4, and the guide rods 501 connected to the electric drive rollers 502 through elastic telescopic members, and two corresponding guide rods 501 on the support cylinder 2 and the connecting cylinder 4 are fixedly connected by a connecting rod 505, and the connecting rod 505 is slidably disposed inside the corresponding guide frame 504;

[0041] By setting up an adjusting cylinder 503, a guide frame 504, a connecting rod 505, and a guide rod 501, the rotation of the adjusting cylinder 503 drives the guide frame 504 to move synchronously. When the guide frame 504 moves, the connecting rod 505 slides inside the guide frame 504. The movement of the connecting rod 505 drives multiple electric drive rollers 502 to move closer or further apart through the guide rod 501, thereby adjusting the distance between the multiple electric drive rollers 502 to suit drill pipes of different specifications and improve the range of applications.

[0042] Among them, such as Figure 4 As shown, a worm gear 506 is fixed to the outside of the adjusting cylinder 503, and a worm 507 that meshes with the worm gear 506 is rotatably provided on the surface of the frame 1, and a rotating plate is fixed to the end of the worm 507.

[0043] By setting up a worm gear 506 and a worm 507, the rotation of the worm 507 drives the worm gear 506 to rotate the adjusting cylinder 503. The cooperation between the worm 507 and the worm gear 506 can achieve the locking effect of the adjusting cylinder 503, avoiding the problem of the adjusting cylinder 503 shaking during use.

[0044] Among them, such as Figures 6-9 As shown, the rotating cylinder 3 is equipped with a rust removal mechanism 6. The rust removal mechanism 6 includes a sand storage box 601 fixed to the outside of the rotating cylinder 3 and multiple annular sand pipes 602. The sand storage box 601 is equipped with a feeding cover and multiple sandblasting pumps 611. The rotating cylinder 3 is equipped with multiple sets of sandblasting components. The sand storage box 601 is connected to the multiple sets of sandblasting components through the annular sand pipes 602. The sandblasting components include multiple mounting brackets 606. The connecting cylinder 4 is fixed with a double-through pipe 609 at the position of each mounting bracket 606. The sand inlet of the double-through pipe 609 is connected to the annular sand pipe 602. The pipes are connected, and two sandblasting pipes 607 are installed on the mounting frame 606. The sandblasting directions of the two sandblasting pipes 607 are set one in front of the other. The inlets of the two sandblasting pipes 607 are respectively connected to the two sand outlet pipes of the double-pass pipe 609. A rotating block 605 is fixed on the side of the mounting frame 606. A rotating sleeve 604 is rotatably mounted on the rotating block 605. Mounting plates 603 are fixed at both ends of the rotating sleeve 604, and the rotating block 605 and the mounting plate 603 are connected by a torsion spring. The mounting plate 603 is fixed to the inner wall of the connecting cylinder 4.

[0045] By configuring a sandblasting pump 611, a sand storage tank 601, a mounting frame 606, a sandblasting pipe 607, a rotating block 605, a rotating sleeve 604, a mounting plate 603, a double-pipe 609, and a torsion spring, the sandblasting pump 611 allows the rust-removing sand inside the sand storage tank 601 to enter the annular sand pipe 602. Further rust-removing sand is then sprayed from the sandblasting pipe 607 through the double-pipe 609 onto the drill rod surface, thus removing rust from the drill rod surface. Simultaneously, as the drill rod enters the annular pipe, rust is removed from its end face. The continued movement of the drill rod drives the mounting frame 606 to rotate, which in turn causes the sandblasting pipe 607 to rotate synchronously, further removing rust from the drill rod surface. After the drill rod moves away from the mounting frame 606, the mounting frame 606 returns to its original position under the action of the torsion spring, removing rust from the other end of the drill rod, achieving comprehensive rust removal for the drill rod.

[0046] Among them, such as Figure 6As shown, at least one partition plate 610 is installed inside the sand storage box 601. The partition plate 610 divides the inside of the sand storage box 601 into multiple sand storage spaces. The inlets of multiple annular sand pipes 602 are connected to the multiple sand storage spaces in sequence.

[0047] By setting up a partition plate 610, the sand storage box 601 is divided into multiple sand storage spaces, which can sequentially feed sand of different fineness, thereby achieving a more thorough rust removal process from coarse grinding to fine grinding.

[0048] Among them, such as Figure 7 and Figure 9 As shown, multiple mounting brackets 606 have contact rollers 608 fixed at one end of their proximity, and control valves are provided on the two sand outlet pipes of the double-through pipe 609.

[0049] By setting up a contact roller 608 and a control valve, the contact roller 608 is used to make contact with the drill rod in advance during the drill rod movement, reducing friction and avoiding wear and tear when the mounting bracket 606 or sandblasting pipe 607 contacts the drill rod. The control valve can control the sand material to enter different sandblasting pipes 607, realize sandblasting work in different directions, and reduce sand material waste.

[0050] Among them, such as Figure 1 and Figure 2 As shown, the top of the frame 1 is provided with a drive mechanism 7 for driving the rotating cylinder 3 to rotate for all-round rust removal. The drive mechanism 7 includes a motor 704 fixed on the surface of the frame 1 and a rotating rod 702 rotatably disposed on the surface of the frame 1. The rotating rod 702 is fixedly connected to the output shaft of the motor 704, and a drive gear 703 is fixed on the outer surface of the rotating rod 702. A driven gear 701 that meshes with the drive gear 703 is fixed on the outer surface of the rotating cylinder 3.

[0051] By setting up a motor 704, a rotating rod 702, a driving gear 703, and a driven gear 701, the motor 704 drives the rotating rod 702 to rotate, which in turn drives the driving gear 703 to rotate synchronously. In turn, the driving gear 703 rotates and meshes with the driven gear 701, which drives the driven gear 701 to rotate the rotating cylinder 3. This causes the rotating cylinder 3 to drive the internal sandblasting pipe 607 to rotate synchronously, thereby achieving all-round grinding and rust removal of the drill rod, making the rust removal more comprehensive.

[0052] Among them, such as Figure 2 , Figure 3 and Figure 10As shown, the connecting cylinder 4 is equipped with a rust prevention mechanism 8 for preventing rust on the drill rod. The rust prevention mechanism 8 includes an annular liquid pipe 804 fixed to the inner wall of the connecting cylinder 4. A liquid storage tank 801 is fixed on the surface of the frame 1 and a liquid filling port is provided on the liquid storage tank 801. A liquid pump 803 is fixed on the top of the liquid storage tank 801. The liquid inlet pipe of the liquid pump 803 penetrates the surface of the liquid storage tank 801 and extends to below the liquid level inside the liquid storage tank 801. The liquid outlet pipe of the liquid pump 803 penetrates the surface of the connecting pipe and is connected to the annular liquid pipe 804. A mixing component is provided inside the liquid storage tank 801 and the mixing mechanism is connected to the drive mechanism 7.

[0053] By setting up a liquid storage tank 801, a liquid pump 803, and an annular liquid pipe 804, the liquid pump 803 extracts the rust-preventive liquid from the liquid storage tank 801. After the rust-preventive liquid is extracted, it is evenly sprayed onto the surface of the drill rod through the annular liquid pipe 804, thereby achieving rust prevention of the drill rod and delaying the oxidation and rusting time of the drill rod.

[0054] Among them, such as Figure 2 and Figure 10 As shown, a stirring rod 802 is rotatably installed inside the liquid storage tank 801, and the end of the stirring rod 802 is fixedly connected to the rotating rod 702;

[0055] By setting up a stirring rod 802, the rotating rod 702 rotates simultaneously, driving the stirring rod 802 to rotate synchronously. The rotation of the stirring rod 802 can stir the rust-preventive liquid inside the storage tank 801, so that the rust-preventive liquid is fully mixed and the problem of unevenness caused by the accumulation of impurities is avoided.

[0056] Work process

[0057] During operation, rotating the rotating plate causes the worm gear 507 to rotate, which in turn drives the worm wheel 506 to rotate the adjusting cylinder 503. The rotation of the adjusting cylinder 503 drives the guide frame 504 to move synchronously. When the guide frame 504 moves, the connecting rod 505 slides inside the guide frame 504. The movement of the connecting rod 505 drives multiple electric transmission rollers 502 to move closer or further apart through the guide rod 501. Adjusting the electric transmission rollers 502 to contact the surface of the drill rod controls the opening of the electric transmission rollers 502, thus using the electric transmission rollers to guide and transport the drill rod.

[0058] The sandblasting pump 611 allows the rust-removing sand material inside the sand storage tank 601 to enter the annular sand pipe 602. The rust-removing sand can then be sprayed from the sandblasting pipe 607 to the surface of the drill rod through the double-pass pipe 609 to remove rust from the drill rod surface. Then, the motor 704 is turned on, which drives the rotating rod 702 to rotate. The rotation of the rotating rod 702 drives the drive gear 703 to rotate synchronously. In turn, the drive gear 703 rotates and meshes with the driven gear 701, which drives the driven gear 701 to drive the rotating cylinder 3 to rotate. This causes the rotating cylinder 3 to drive the internal sandblasting pipe 607 to rotate synchronously.

[0059] When the drill rod enters, it can remove rust from the end face of the drill rod. The drill rod continues to move until it contacts the contact roller 608, which drives the mounting frame 606 to rotate. The rotation of the mounting frame 606 drives the sandblasting pipe 607 to rotate synchronously, thereby removing rust from the surface of the drill rod through the sandblasting pipe 607. After the drill rod moves to the point of disengaging from the mounting frame 606, the mounting frame 606 returns to its original position under the action of the torsion spring, and removes rust from the other end of the drill rod, thus achieving all-round rust removal of the drill rod.

[0060] After the rust removal work, the drill rod is placed inside the connecting cylinder 4, and the liquid pump 803 is turned on. The liquid pump 803 extracts the rust-preventive liquid from the storage tank 801. After the rust-preventive liquid is extracted, it is evenly sprayed onto the surface of the drill rod through the annular liquid pipe 804 to achieve rust prevention of the drill rod and delay the oxidation and rusting time of the drill rod.

[0061] After the work is completed, the sand and rust inhibitor are discharged through the channels opened on the surface of the rotating cylinder 3 and the connecting cylinder 4.

[0062] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rust removal and prevention device for drill pipes, characterized in that, The machine includes a frame (1), on the top of which a support cylinder (2) and a connecting cylinder (4) are fixed. A rotating cylinder (3) is rotatably connected between the support cylinder (2) and the connecting cylinder (4). Both the support cylinder (2) and the connecting cylinder (4) are provided with a support mechanism (5). The support mechanism (5) includes multiple electric drive rollers (502). The side of the support cylinder (2) is provided with an adjustment component for adjusting the distance between the multiple electric drive rollers (502). The rotating cylinder (3) is equipped with a rust removal mechanism (6). The rust removal mechanism (6) includes a sand storage box (601) fixed outside the rotating cylinder (3) and multiple annular sand pipes (602). The sand storage box (601) is equipped with a feeding cover and multiple sandblasting pumps (611). The rotating cylinder (3) is equipped with multiple sets of sandblasting components. The sand storage box (601) is connected to the multiple sets of sandblasting components through the annular sand pipes (602). The top of the frame (1) is provided with a drive mechanism (7) for driving the rotating cylinder (3) to rotate for all-round rust removal. The connecting cylinder (4) is equipped with a rust prevention mechanism (8) for preventing rust on the drill rod. The sandblasting assembly includes multiple mounting brackets (606). The connecting cylinder (4) is fixed with a double-pass pipe (609) at the position of each mounting bracket (606). The sand inlet of the double-pass pipe (609) is connected to the annular pipe. Two sandblasting pipes (607) are installed on the mounting bracket (606). The sandblasting directions of the two sandblasting pipes (607) are arranged one in front of the other. The inlets of the two sandblasting pipes (607) are respectively connected to the two sand outlets of the double-pass pipe (609). A rotating block (605) is fixed on the side of the mounting bracket (606). A rotating sleeve (604) is rotatably provided on the rotating block (605). Mounting plates (603) are fixed at both ends of the rotating sleeve (604). The rotating block (605) and the mounting plate (603) are connected by a torsion spring. The mounting plate (603) is fixed to the inner wall of the connecting cylinder (4). Each of the multiple mounting brackets (606) has a contact roller (608) fixed at one end of its proximity, and each of the two sand outlet pipes of the double-pass pipe (609) is equipped with a control valve.

2. The rust removal and prevention device for drill pipes according to claim 1, characterized in that, The adjustment assembly includes an adjustment cylinder (503) rotatably disposed on the side of the support cylinder (2). The outer surface of the adjustment cylinder (503) is provided with multiple guide frames (504). Multiple guide rods (501) corresponding to the electric drive roller (502) are slidably disposed on both the support cylinder (2) and the connecting cylinder (4). The guide rods (501) are connected to the electric drive roller (502) through elastic telescopic members. Two corresponding guide rods (501) on the support cylinder (2) and the connecting cylinder (4) are fixedly connected by a connecting rod (505). The connecting rod (505) is slidably disposed inside the corresponding guide frame (504).

3. The rust removal and prevention device for drill pipes according to claim 2, characterized in that, The adjusting cylinder (503) is fixed with a worm gear (506) on the outside. The surface of the frame (1) is rotatably provided with a worm (507) that meshes with the worm gear (506), and a rotating plate is fixed at the end of the worm (507).

4. The rust removal and prevention device for drill pipes according to claim 1, characterized in that, The drive mechanism (7) includes a motor (704) fixed on the surface of the frame (1) and a rotating rod (702) rotatably disposed on the surface of the frame (1). The rotating rod (702) is fixedly connected to the output shaft of the motor (704), and a drive gear (703) is fixed on the outer surface of the rotating rod (702). A driven gear (701) meshing with the drive gear (703) is fixed on the outer surface of the rotating cylinder (3).

5. A rust removal and prevention device for drill pipes according to claim 4, characterized in that, The rust prevention mechanism (8) includes an annular liquid pipe (804) fixed to the inner wall of the connecting cylinder (4). A liquid storage tank (801) is fixed on the surface of the frame (1) and a liquid filling port is provided on the liquid storage tank (801). A liquid pump (803) is fixed on the top of the liquid storage tank (801). The inlet pipe of the liquid pump (803) penetrates the surface of the liquid storage tank (801) and extends to below the liquid level inside the liquid storage tank (801). The outlet pipe of the liquid pump (803) penetrates the surface of the connecting pipe and is connected to the annular liquid pipe (804). A stirring rod (802) is rotatably provided inside the liquid storage tank (801), and the end of the stirring rod (802) is fixedly connected to the rotating rod (702).

6. The rust removal and prevention device for drill pipes according to claim 1, characterized in that, The sand storage box (601) is equipped with at least one partition plate (610), which divides the interior of the sand storage box (601) into multiple sand storage spaces. The inlets of multiple annular sand pipes (602) are connected to the multiple sand storage spaces in sequence.

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