A drill pipe thread grease automatic spraying device and operation method

Abstract

The present application relates to the field of drilling engineering, and particularly relates to a kind of automatic spraying device and operating method of drill pipe thread grease, including self-locking screw lifting platform, rotating platform assembly, support assembly, telescopic rod assembly, spraying head and thread grease conveying pipe;Spraying head includes outer thread spraying assembly, push-pull cylinder A, piston rod A, push-pull cylinder B, piston rod B, inner thread spraying assembly and shell;The self-locking screw lifting platform realizes the lifting of spraying head;The rotating platform assembly realizes the rotation of spraying head;The telescopic rod assembly realizes the centring of spraying head;The spraying head is sprayed with thread grease to drill pipe joint.The beneficial effects of the present application are: automatic spraying thread grease is realized, intelligent drill pipe conductor ring is prevented from being contaminated, operation efficiency is improved and different specifications of drill pipe joint can be adapted.

Description

Technical Field

[0001] This invention relates to the field of drilling engineering, and in particular to an apparatus and operating method for automatic spraying of grease onto drill pipe threads. Background Technology

[0002] In oil drilling operations, conventional drilling rigs typically employ manual methods to apply thread grease to drill pipes. This method is not only inefficient and labor-intensive, but also exposes the operator to harsh working conditions. Furthermore, human error can lead to uneven coating thickness and discontinuous coverage, often resulting in localized excessive buildup or missed areas, severely impacting the reliability of drill pipe joints. With the development of automated and intelligent drilling technologies, intelligent drilling rigs have become an industry trend, necessitating the development of devices capable of automatically applying thread grease to enhance equipment automation. Moreover, when dealing with intelligent drill pipes with conductive rings, as disclosed in patent CN100532779C, both manual methods and existing grease application devices lack effective anti-contamination mechanisms, easily causing thread grease contamination of the conductive rings and threatening the stability of downhole signal transmission. Therefore, developing a special device that can achieve both automatic and uniform thread grease application and precise prevention of conductive ring contamination is crucial for overcoming these technical bottlenecks and improving the supporting technologies for intelligent drilling rigs. Summary of the Invention

[0003] The purpose of this invention is to address the problems of low efficiency, difficulty in controlling coating quality, insufficient automation, and easy contamination of the conductive ring thread grease when applied to intelligent drill pipes with conductive rings in existing thread grease coating methods. This invention provides an automatic thread grease spraying device and operating method for drill pipes, enabling automatic, uniform, and quantitative spraying of thread grease while effectively preventing contamination of the conductive ring, thereby improving the automation level of intelligent drilling rig operations and the reliability of drill string connections.

[0004] To achieve the above objectives, the present invention provides the following technical solution: An automatic drill pipe thread grease spraying device includes a self-locking screw lifting platform, a rotating platform assembly, a support assembly, a telescopic rod assembly, a spray head, and a thread grease delivery pipe. The self-locking screw lifting platform includes a base, a screw nut assembly, and a lifting column. The screw nut assembly is fixedly mounted on the base and drives the lifting column to move up and down. The rotating platform assembly includes a rotating platform and a motor. The rotating platform is fixed to the top of the lifting column and includes a rotating component, which is driven to rotate by the motor. The support assembly includes a rotating column and a support plate, with the rotating column connected to the rotating component. The telescopic rod assembly includes a centering cylinder and a piston rod Z. The centering cylinder is fixedly connected to the rotating column, and the piston rod Z is connected to the spray head. One end of the support plate is fixedly connected to the rotating column, and the other end is fixedly connected to the centering cylinder to improve its rigidity. The centering cylinder extends and retracts by pushing the piston rod Z, causing the spray head to move and align its axis with the drill pipe axis. The spray head includes an external thread spraying assembly, a push-pull hydraulic cylinder A, a piston rod A, a push-pull hydraulic cylinder B, a piston rod B, an internal thread spraying assembly, and a housing. The external thread spraying assembly includes a support frame A, a push-pull head A, and an external thread grease spraying module. The support frame A is screwed to the housing. The upper section of the support frame A is a tapered guide rail that is wider at the top and narrower at the bottom, and the lower section is a straight guide rail of equal width. The piston rod A is connected to the push-pull head A. The push-pull head A is connected to the external thread grease spraying module. When the piston rod A drives the push-pull head A to move, the push-pull head A drives the external thread grease spraying module to move along the support frame A. In the upper inclined guide rail area, because the radial dimension of the guide rail continuously decreases from top to bottom, the external thread grease spraying module... While moving, radial displacement is generated, realizing the diameter change of the external thread spraying component, which can adapt to the external thread joints of drill pipes of different specifications and sizes; the external thread grease delivery pipe is connected to the external thread grease spraying module; the external thread spraying component is moved by the lifting platform of the self-locking screw nut assembly; the external thread spraying component moves upward and contacts the stepped surface of the external thread joint, and then moves downward. During the downward movement of the external thread spraying component, the opening and closing of the external thread grease delivery pipe is controlled according to the spraying requirements to spray thread grease on the external thread joint until it is completely separated from the external thread joint and the spraying stops; the number of external thread grease spraying modules is a, a≥4; The internal thread spraying assembly includes a support frame B, a push-pull head B, an internal thread grease spraying module, an upper rubber ring, a lower rubber ring, and a barrier pad; a fixing ring is located above the support frame B, and the fixing ring is connected to the outer shell by screws; a guide rail seat is located below the support frame B, which is used to fix the distributed guide rails, for example, the upper sections of guide rails A and B are straight guide rails of equal width, and their lower sections are tapered guide rails that are wider at the top and narrower at the bottom; pipeline holes are opened on the guide rail seat and between guide rails A and B; a piston hole A and a guide rail cavity are opened on the upper surface of the push-pull head B; a telescopic shaft is installed on the side of the push-pull head B; The push-pull head B is connected to the piston rod B through the piston hole A; the internal thread grease spraying module has a hinge hole, which connects to the telescopic shaft on the push-pull head B; when the piston rod B drives the push-pull head B to move, the push-pull head B drives the internal thread grease spraying module to move along the support frame B. Since the guide rail on the support frame B is a tapered guide rail, the internal thread grease spraying module generates radial displacement while moving, realizing the diameter change of the internal thread spraying assembly, which can adapt to drill pipe internal thread joints of different specifications and sizes; the internal thread grease spraying module has upper and lower cavity partitions. The upper and lower chambers of the internal thread grease spraying module are divided into an upper chamber and a lower chamber. The internal thread grease delivery pipes are connected to the upper chamber spray hole and the lower chamber spray hole, respectively. A barrier pad is located at the bottom of the internal thread grease spraying module. The internal thread spraying assembly is moved via a self-locking screw and nut assembly lifting platform. During the downward movement of the internal thread spraying assembly, the opening and closing of the internal thread grease delivery pipes are controlled according to the spraying requirements to spray grease onto the internal thread joint until the internal thread spraying assembly contacts the stepped surface of the internal thread joint, at which point spraying stops. The barrier pad can block and absorb downward dripping thread grease, preventing the thread grease from entering and contaminating the conductive ring; the number of internal thread grease spraying modules is n, and the number of guide rails A and B is m, n=m≥4; the internal thread grease spraying module has an upper groove for installing the upper rubber ring; the internal thread grease spraying module has a lower groove for installing the lower rubber ring; when the piston rod B drives the push-pull head B to move, the upper and lower rubber rings can ensure that the internal thread grease spraying module remains in contact with the guide rails during the movement of guide rails A and B.

[0005] An operating method for an automatic drill pipe thread grease spraying device includes the following steps: S1: Drill pipe joint fixed, awaiting spraying; S2: The self-locking screw lifting platform rises to height h1, the rotating platform rotates, and the core cylinder extends to the target length L1, so as to align the axis of the spray head with the axis of the drill rod. S3: If the object to be sprayed is an internal threaded connector, proceed to step S4; if the object to be sprayed is an external threaded connector, proceed to step S13. S4: Push-pull hydraulic cylinder B descends; S5: Determine whether d1 is close to D1. If it is close, proceed to step S6; if it is not close, proceed to step S4. S6: Push-pull hydraulic cylinder B stops descending; S7: The self-locking screw lifting platform descends; S8: Determine whether spraying is required. If it is required, proceed to step S9; if it is not required, proceed to step S7. S9: Determine whether all lines of the internal thread grease delivery pipe need to be opened simultaneously. If it is determined that it is necessary, then all lines of the internal thread grease delivery pipe are opened simultaneously. If it is determined that it is not necessary, then open some lines of the internal thread grease delivery pipe as needed. S10: Determine whether the device has descended to the internal threaded joint step surface. If it is determined that it has descended to the internal threaded joint step surface, proceed to step S11; if it is determined that it has not descended to the internal threaded joint step surface, proceed to step S12. S11: Close the internal thread grease delivery pipe, raise the self-locking screw lifting platform to height h1, push and pull the hydraulic cylinder B back to the initial position, and execute step S25; S12: The self-locking screw lifting platform continues to descend, proceeding to step S8; S13: Push-pull hydraulic cylinder A rises; S14: Determine if d2 is close to D2. If it is close, proceed to step S15; if it is not close, proceed to step S13. S15: Push-pull hydraulic cylinder A stops rising; S16: Self-locking screw lifting table rises; S17: Determine whether the device has risen to the external threaded joint step surface. If it is determined that it has risen to the external threaded joint step surface, then execute step S18; if it is determined that it has not risen to the external threaded joint step surface, then execute step S16. S18: The self-locking screw lifting platform begins to descend; S19: Determine whether spraying is required. If it is required, proceed to step S20; if it is not required, proceed to step S18. S20: The self-locking screw lifting platform stops descending; S21: Determine whether it is necessary to open all lines of the external thread grease delivery pipe at the same time. If it is determined that it is necessary, then open all lines of the external thread grease delivery pipe at the same time; if it is determined that it is not necessary, then open some lines of the external thread grease delivery pipe as needed. S22: Determine whether the device has left the external threaded connector. If it is determined that it has left, proceed to step S23; if it is determined that it has not left, proceed to step S24. S23: Close the external thread grease delivery pipe, return the self-locking screw lifting platform to height h1, push-pull hydraulic cylinder A to the initial position, and execute step S25; S24: The self-locking screw lifting platform continues to descend, proceeding to step S19; S25: Determine if there is another drill rod that needs to be sprayed. If it is determined that it is, proceed to step S26; if it is determined that it is not, proceed to step S27. S26: Remove the spray head, the next drill rod will be installed, the next drill rod joint is fixed, wait for spraying, rotate the rotating platform to align the axis of the spray head with the axis of the drill rod, and execute step S3; S27: The cardiac cylinder retracts to its initial length, the rotating platform rotates back to its initial position, and the self-locking screw lifting platform rises to its initial height.

[0006] Compared with the prior art, the beneficial effects of the present invention are: Achieving automated coating and quantitative control: Replacing traditional manual coating with automated spraying eliminates the arbitrariness caused by human operation and significantly improves the connection reliability of drill pipe joints; Effective protection of the conductive ring of the smart drill pipe: By setting a barrier pad that also has a grease-absorbing function, and with precise control of the spraying amount and spraying path, the migration and adhesion of thread grease to the conductive ring area is effectively blocked. This solves the industry problem in the prior art that the conductive ring is easily contaminated by thread grease, leading to signal transmission failure. It is especially suitable for the special operation requirements of smart drill pipes. Significantly improves operational efficiency and safety: The device can be linked with the control system of intelligent drilling rigs to achieve unattended rapid grease application, shortening the auxiliary time of drilling operations; at the same time, it reduces the direct contact between wellhead workers and thread grease and equipment, improves working conditions, and reduces occupational health risks and safety risks. Highly adaptable and integrated: The device can adapt to drill pipe threads of different specifications and sizes, and the parameters of the entire coating process are controllable and traceable, perfectly meeting the needs of intelligent drilling rigs for automated and digital management of wellhead tools. Attached Figure Description

[0007] Figure 1 A schematic diagram of an automatic grease spraying device for drill pipe threads; Figure 2 This is a schematic diagram of the spray head structure; Figure 3 This is a schematic diagram of the internal thread spraying assembly structure; Figure 4 This is a schematic diagram of support frame B. Figure 5 This is a schematic diagram of the internal thread grease spraying module. Figure 6 This is a schematic diagram of the internal thread grease spraying module after it has been moved. Figure 7 A schematic diagram showing the internal thread spraying assembly reaching the stepped surface of the internal thread joint. Figure 8 A flowchart of an automatic grease spraying device for drill pipe threads; Figure 9 for Figure 8 A schematic diagram of the contents of the T1 block diagram; Figure 10 for Figure 8 A schematic diagram of the contents of the T2 block diagram; In the diagram: 1—Base; 2—Screw and nut assembly; 3—Lifting column; 4—Rotating platform; 401—Rotating component; 5—Motor; 6—Support plate; 7—Thread grease delivery pipe; 701—External thread grease delivery pipe; 702—Internal thread grease delivery pipe; 8—Rotating column; 9—Cornering cylinder; 10—Piston rod Z; 11—Spray head; 12—External thread grease spraying module; 13—Support frame A; 14—Push-pull head A; 15—Outer shell; 16—Piston rod A; 17—Push-pull cylinder A; 18—Push-pull cylinder B; 19—Piston rod B; 20—Push-pull head B; 2001—Piston hole A; 2002—Guide rail cavity; 2003—Telescopic shaft; 21—Support frame B; 2101—Fixing ring; 2102—Guide rail seat; 2103—Pipe hole; 2104—Guide rail A; 2105—Guide rail B; 22—Internal thread grease spraying module; 2201—Reamed hole; 2202—Upper groove of rubber ring; 2203—Upper cavity spraying hole; 2204—Upper and lower cavity partition; 2205—Lower cavity spraying hole; 2206—Lower groove of rubber ring; 2207—Upper chamber; 2208—Lower chamber; 23—Barrier pad; 24—Upper rubber ring; 25—Lower rubber ring; 26—External threaded joint; 2601—Stepped surface of external threaded joint; 27—Internal threaded joint; 2701—Stepped surface of internal threaded joint. Detailed Implementation

[0008] like Figure 1 As shown, an automatic drill pipe thread grease spraying device includes a self-locking screw lifting platform, a rotating platform assembly, a support assembly, a telescopic rod assembly, a spray head 11, and a thread grease delivery pipe 7. The self-locking screw lifting platform includes a base 1, a screw nut assembly 2, and a lifting column 3. The screw nut assembly 2 is mounted and fixed on the base 1, and drives the lifting column 3 to perform lifting movements. The rotating platform assembly includes a rotating platform 4 and a motor 5. The rotating platform 4 is fixed to the top of the lifting column 3 and includes a rotating component 401. The motor 5 drives the rotating platform 3. The rotating component 401 rotates; the support assembly includes a rotating column 8 and a support plate 6, with the rotating column 8 connected to the rotating component 401; the telescopic rod assembly includes a centering cylinder 9 and a piston rod Z10, with the centering cylinder 9 fixedly connected to the rotating column 8 and the piston rod Z10 connected to the spray head 11; one end of the support plate 6 is fixedly connected to the rotating column 8, and the other end is fixedly connected to the centering cylinder 9 to improve the rigidity of the centering cylinder 9; the centering cylinder 9 extends and retracts by pushing the piston rod Z10, thereby moving the spray head 11 so that the axis of the spray head 11 is aligned with the axis of the drill rod; like Figure 1 , Figure 2As shown, the spray head 11 includes an external thread spraying assembly, a push-pull hydraulic cylinder A17, a piston rod A16, a push-pull hydraulic cylinder B18, a piston rod B19, an internal thread spraying assembly, and a housing 15. The external thread spraying assembly includes a support frame A13, a push-pull head A14, and an external thread grease spraying module 12. The support frame A13 is screwed to the housing 15. The upper section of the support frame A13 is a tapered guide rail that is wider at the top and narrower at the bottom, and the lower section is a straight guide rail of equal width. The piston rod A16 is connected to the push-pull head A14. The push-pull head A14 is connected to the external thread grease spraying module 12. When the piston rod A16 drives the push-pull head A14 to move, the push-pull head A14 drives the external thread grease spraying module 12 to move along the support frame A13. In the upper inclined guide rail area, since the radial dimension of the guide rail is connected from top to bottom... The continuous decrease in diameter causes the external thread grease spraying module 12 to undergo radial displacement while moving, thus realizing the diameter change of the external thread spraying assembly and adapting to external threaded joints of drill pipes of different specifications and sizes. The external thread grease delivery pipe 701 is connected to the external thread grease spraying module 12. The external thread spraying assembly moves through a self-locking screw nut assembly lifting platform. After the external thread spraying assembly moves upward and contacts the stepped surface 2601 of the external threaded joint, it moves downward. During the downward movement of the external thread spraying assembly, the opening and closing of the external thread grease delivery pipe 701 is controlled according to the spraying requirements to spray thread grease onto the external threaded joint 26 until it is completely detached from the external threaded joint 26 and the spraying stops. The number of external thread grease spraying modules 12 is a, where a≥4. like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the internal thread spraying assembly includes a support frame B21, a push-pull head B20, an internal thread grease spraying module 22, an upper rubber ring 24, a lower rubber ring 25, and a barrier pad 23. A fixing ring 2101 is located above the support frame B21, and the fixing ring 2101 is connected to the outer casing 15 by screws. A guide rail seat 2102 is located below the support frame B21, used to fix dispersed guide rails. For example, the upper sections of guide rails A2104 and B2105 are straight guide rails of equal width, while their lower sections are tapered guide rails that are wider at the top and narrower at the bottom. A pipeline hole 2103 is opened on the guide rail seat 2102 and between guide rails A2104 and B2105. A piston hole A2001 and a guide rail cavity 2100 are opened on the upper surface of the push-pull head B20. 002; A telescopic shaft 2003 is installed on the side of the push-pull head B20; the push-pull head B20 is connected to the piston rod B19 through the piston hole A2001; the internal thread grease spraying module 22 has a hinge hole 2201, and the internal thread grease spraying module 22 is connected to the telescopic shaft 2003 on the push-pull head B through the hinge hole 2201; when the piston rod B19 drives the push-pull head B20 to move, the push-pull head B20 drives the internal thread grease spraying module 22 to move along the support frame B21. Since the guide rail on the support frame B21 is a tapered guide rail, the internal thread grease spraying module 22 generates radial displacement while moving, realizing the change of diameter of the internal thread spraying component, which can adapt to the internal thread joints of drill rods of different specifications and sizes; internal thread grease spraying module 2 The internal thread grease spraying module 22 has an upper and lower chamber partition 2204, which divides the module into an upper chamber 2207 and a lower chamber 2208. The internal thread grease delivery pipe 702 connects to the upper chamber spray hole 2203 of the upper chamber 2207 and the lower chamber spray hole 2205 of the lower chamber 2208. A barrier pad 23 is located at the bottom of the internal thread grease spraying module 22. The internal thread spraying assembly moves via a self-locking screw and nut assembly lifting platform. During the downward movement of the internal thread spraying assembly, the opening and closing of the internal thread grease delivery pipe 702 is controlled according to the spraying requirements to spray grease onto the internal thread joint 27 until the internal thread spraying assembly contacts the stepped surface 270 of the internal thread joint. At time 1, spraying stops; the barrier pad 23 can block and absorb the downward dripping thread grease, preventing the thread grease from entering and contaminating the conductive ring; the number of internal thread grease spraying modules 22 is n, and the number of guide rails A2104 and guide rails B2105 is m, n=m≥4; the internal thread grease spraying module 22 has an upper rubber ring groove 2202 for installing the upper rubber ring 24; the internal thread grease spraying module 22 has a lower rubber ring groove 2206 for installing the lower rubber ring 25; when the piston rod B19 drives the push-pull head B20 to move, the upper rubber ring 24 and the lower rubber ring 25 can keep the internal thread grease spraying module 22 in contact with the guide rails during the movement of guide rails A2104 and guide rails B2105.

[0009] like Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 As shown, an operating method for an automatic drill pipe thread grease spraying device includes the following steps: S1: Drill pipe joint fixed, awaiting spraying; S2: The self-locking screw lifting platform rises to height h1, the rotating platform 4 rotates, and the centering cylinder 9 extends to the target length L1, so that the axis of the spray head 11 is aligned with the axis of the drill rod. S3: If the object to be sprayed is the internal threaded connector 27, proceed to step S4; if the object to be sprayed is the external threaded connector 26, proceed to step S13. S4: Push-pull hydraulic cylinder B18 descends; S5: Determine whether d1 is close to D1. If it is close, proceed to step S6; if it is not close, proceed to step S4. S6: Push-pull hydraulic cylinder B18 stops descending; S7: The self-locking screw lifting platform descends; S8: Determine whether spraying is required. If it is required, proceed to step S9; if it is not required, proceed to step S7. S9: Determine whether all pipelines of the internal thread grease delivery pipe 702 need to be opened simultaneously. If it is determined that it is necessary, then all pipelines of the internal thread grease delivery pipe 702 are opened simultaneously. If it is determined that it is not necessary, then open some pipelines of the internal thread grease delivery pipe 702 as needed. S10: Determine whether the device has descended to the internal threaded joint step surface 2701. If it is determined that it has descended to the internal threaded joint step surface 2701, then execute step S11; if it is determined that it has not descended to the internal threaded joint step surface 2701, then execute step S12. S11: Close the internal thread grease delivery pipe 702, the self-locking screw lifting platform rises to height h1, push-pull hydraulic cylinder B18 returns to the initial position, and execute step S25. S12: The self-locking screw lifting platform continues to descend, proceeding to step S8; S13: Push-pull hydraulic cylinder A17 rises; S14: Determine if d2 is close to D2. If it is close, proceed to step S15; if it is not close, proceed to step S13. S15: Push-pull hydraulic cylinder A17 stops rising; S16: Self-locking screw lifting table rises; S17: Determine whether the device has risen to the external threaded joint step surface 2601. If it is determined that it has risen to the external threaded joint step surface 2601, then execute step S18; if it is determined that it has not risen to the external threaded joint step surface 2601, then execute step S16. S18: The self-locking screw lifting platform begins to descend; S19: Determine whether spraying is required. If it is required, proceed to step S20; if it is not required, proceed to step S18. S20: The self-locking screw lifting platform stops descending; S21: Determine whether it is necessary to open all pipelines of the external thread grease delivery pipe 701 at the same time. If it is determined that it is necessary, then all pipelines of the external thread grease delivery pipe 701 shall be opened at the same time; if it is determined that it is not necessary, then open some pipelines of the external thread grease delivery pipe 701 as needed. S22: Determine whether the device has left the external threaded connector. If it is determined that it has left, proceed to step S23; if it is determined that it has not left, proceed to step S24. S23: Close the external thread grease delivery pipe 701, return the self-locking screw lifting platform to height h1, return the push-pull hydraulic cylinder A17 to the initial position, and execute step S25; S24: The self-locking screw lifting platform continues to descend, proceeding to step S19; S25: Determine if there is another drill rod that needs to be sprayed. If it is determined that it is, proceed to step S26; if it is determined that it is not, proceed to step S27. S26: Remove the spray head 11, the next drill rod will be installed, the next drill rod joint is fixed, wait for spraying, rotate the rotating platform 4 to align the axis of the spray head 11 with the axis of the drill rod, and execute step S3. S27: The cardiac fluid cylinder 9 retracts to its initial length, the rotating platform 4 rotates back to its initial position, and the self-locking screw lifting platform rises to its initial height.

[0010] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0011] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

Claims

1. An automatic grease spraying device for drill pipe threads, characterized in that, The system includes a self-locking screw lifting platform, a rotating platform assembly, a support assembly, a telescopic rod assembly, a spray head (11), and a threaded grease delivery pipe (7). The self-locking screw lifting platform includes a base (1), a screw nut assembly (2), and a lifting column (3). The screw nut assembly (2) is installed and fixed on the base (1), and the screw nut assembly (2) drives the lifting column (3) to perform lifting movements. The rotating platform assembly includes a rotating platform (4) and a motor (5). The rotating platform (4) is fixed on the top of the lifting column (3), and the rotating platform (4) includes a rotating component (401). The motor (5) drives the rotating component (401) to rotate. The support assembly includes a rotating column (8) and a support plate (6), with the rotating column (8) connected to the rotating component (401); the telescopic rod assembly includes a centering cylinder (9) and a piston rod Z (10), with the centering cylinder (9) fixedly connected to the rotating column (8) and the piston rod Z (10) connected to the spray head (11); one end of the support plate (6) is fixedly connected to the rotating column (8), and the other end is fixedly connected to the centering cylinder (9) to improve the rigidity of the centering cylinder (9); the centering cylinder (9) pushes the piston rod Z (10) to extend and retract, thereby moving the spray head (11) so that the axis of the spray head (11) is aligned with the axis of the drill rod; The spray head (11) includes an external thread spray assembly, a push-pull hydraulic cylinder A (17), a piston rod A (16), a push-pull hydraulic cylinder B (18), a piston rod B (19), an internal thread spray assembly, and a housing (15); the external thread spray assembly includes a support frame A (13), a push-pull head A (14), and an external thread grease spraying module (12); the support frame A (13) is screwed to the housing (15), the upper section of the support frame A (13) is a tapered guide rail that is wider at the top and narrower at the bottom, and the lower section is a straight guide rail of equal width; the piston rod A (16) is connected to the push-pull head A (14); the push-pull head A (14) is connected to the external thread grease spraying module (12); when the piston rod A (16) drives the push-pull head A (14) to move, the push-pull head A (14) drives the external thread grease spraying module (12) to move along the support frame A (13), in the upper inclined guide rail area, due to the guide The radial dimension of the rail decreases continuously from top to bottom, causing the external thread grease spraying module (12) to generate radial displacement while moving, thus realizing the change of diameter of the external thread spraying component, which can adapt to the external thread joints of drill pipes of different specifications and sizes; the external thread grease delivery pipe (701) is connected to the external thread grease spraying module (12); the external thread spraying component moves through the lifting platform of the self-locking screw nut assembly; the external thread spraying component moves upward and contacts the step surface (2601) of the external thread joint, and then moves downward. During the downward movement of the external thread spraying component, the opening and closing of the external thread grease delivery pipe (701) is controlled according to the spraying requirements to spray thread grease on the external thread joint (26) until it is completely separated from the external thread joint (26) and the spraying stops; the number of external thread grease spraying modules (12) is a, a≥4; The internal thread spraying assembly includes a support frame B (21), a push-pull head B (20), an internal thread grease spraying module (22), an upper rubber ring (24), a lower rubber ring (25), and a barrier pad (23); a fixing ring (2101) is located above the support frame B (21), and the fixing ring (2101) is connected to the outer shell (15) by screws; a guide rail seat (2102) is located below the support frame B (21), and the guide rail seat (2102) is used to fix the dispersed guide rails, such as the upper section of guide rail A (2104) and guide rail B (2105) being a straight guide rail of equal width, and the lower section being a tapered guide rail that is wider at the top and narrower at the bottom; a pipeline hole (2103) is opened on the guide rail seat (2102) and between guide rail A (2104) and guide rail B (2105); the push-pull head B (20) is located above ... The upper surface of the pull head B (20) has a piston hole A (2001) and a guide rail cavity (2002); a telescopic shaft (2003) is installed on the side of the push-pull head B (20); the push-pull head B (20) is connected to the piston rod B (19) through the piston hole A (2001); the internal thread grease spraying module (22) has a hinge hole (2201), and the internal thread grease spraying module (22) is connected to the telescopic shaft (2003) on the push-pull head B through the hinge hole (2201); when the piston rod B (19) drives the push-pull head B (20) to move, the push-pull head B (20) drives the internal thread grease spraying module (22) to move along the support frame B (21). Since the guide rail on the support frame B (21) is a tapered guide rail, the internal thread grease spraying module (22) moves along the support frame B (21). Simultaneously, radial displacement is generated, realizing the diameter change of the internal thread spraying component, which can adapt to the internal thread joints of drill pipes of different specifications and sizes; the internal thread grease spraying module (22) has an upper and lower cavity partition (2204), which divides the internal thread grease spraying module (22) into an upper cavity (2207) and a lower cavity (2208), and the internal thread grease delivery pipe (702) is connected to the upper cavity spraying hole (2203) of the upper cavity (2207) and the lower cavity spraying hole (2205) of the lower cavity (2208) respectively; the barrier pad (23) is located at the bottom of the internal thread grease spraying module (22); the internal thread spraying component is moved by the lifting platform of the self-locking screw nut assembly; during the downward movement of the internal thread spraying component, according to the spraying To meet the coating requirements, the opening and closing of the internal thread grease delivery pipe (702) is controlled to spray thread grease onto the internal thread joint (27) until the internal thread spraying component contacts the internal thread joint step surface (2701), at which point the spraying stops; the barrier pad (23) can block and absorb the thread grease dripping downwards, preventing the thread grease from entering and contaminating the conductive ring; the number of internal thread grease spraying modules (22) is n, and the number of guide rails A (2104) and guide rails B (2105) is m, n=m≥4; the internal thread grease spraying module (22) has an upper rubber ring groove (2202) for installing the upper rubber ring (24); the internal thread grease spraying module (22) has a lower rubber ring groove (2206) for installing the lower rubber ring (25).When the piston rod B (19) drives the push-pull head B (20) to move, the upper rubber ring (24) and the lower rubber ring (25) ensure that the internal thread grease spraying module (22) remains in contact with the guide rails during the movement of guide rails A (2104) and B (2105).

2. An operating method for an automatic drill pipe thread grease spraying device, characterized in that, Includes the following steps: S1: Drill pipe joint fixed, awaiting spraying; S2: The self-locking screw lifting platform rises to a height h1, the rotating platform (4) rotates, and the core cylinder (9) extends to the target length L1, so that the axis of the spray head (11) is aligned with the axis of the drill rod. S3: If the object to be sprayed is an internal threaded connector (27), proceed to step S4; if the object to be sprayed is an external threaded connector (26), proceed to step S13. S4: Push-pull hydraulic cylinder B (18) descends; S5: Determine whether d1 is close to D1. If it is close, proceed to step S6; if it is not close, proceed to step S4. S6: Push-pull hydraulic cylinder B (18) stops descending; S7: The self-locking screw lifting platform descends; S8: Determine whether spraying is required. If it is determined that spraying is required, proceed to step S9. If it is determined that it is not needed, proceed to step S7; S9: Determine whether all lines of the internal thread grease delivery pipe (702) need to be opened simultaneously. If it is determined that it is needed, all lines of the internal thread grease delivery pipe (702) will be opened simultaneously. If it is determined that it is not needed, open some lines of the internal thread grease delivery pipe (702) according to the requirements. S10: Determine whether the device has descended to the internal threaded joint step surface (2701). If it is determined that it has descended to the internal threaded joint step surface (2701), then execute step S11; if it is determined that it has not descended to the internal threaded joint step surface (2701), then execute step S12. S11: Close the internal thread grease delivery pipe (702), the self-locking screw lifting platform rises to height h1, push and pull the hydraulic cylinder B (18) back to the initial position, and execute step S25; S12: The self-locking screw lifting platform continues to descend, proceeding to step S8; S13: Push-pull hydraulic cylinder A (17) rises; S14: Determine if d2 is close to D2. If it is close, proceed to step S15; if it is not close, proceed to step S13. S15: Push-pull hydraulic cylinder A (17) stops rising; S16: Self-locking screw lifting table rises; S17: Determine whether the device has risen to the external threaded connector step surface (2601). If it is determined that it has risen to the external threaded connector step surface (2601), then execute step S18; if it is determined that it has not risen to the external threaded connector step surface (2601), then execute step S16. S18: The self-locking screw lifting platform begins to descend; S19: Determine whether spraying is required. If it is required, proceed to step S20; if it is not required, proceed to step S18. S20: The self-locking screw lifting platform stops descending; S21: Determine whether all lines of the external thread grease delivery pipe (701) need to be opened simultaneously. If it is determined that it is needed, all lines of the external thread grease delivery pipe (701) will be opened simultaneously. If it is determined that it is not needed, open some lines of the external thread grease delivery pipe (701) according to the requirements. S22: Determine whether the device has left the external threaded connector. If it is determined that it has left, proceed to step S23; if it is determined that it has not left, proceed to step S24. S23: Close the external thread grease delivery pipe (701), the self-locking screw lifting platform returns to height h1, the push-pull hydraulic cylinder A (17) returns to the initial position, and execute step S25; S24: The self-locking screw lifting platform continues to descend, proceeding to step S19; S25: Determine if there is another drill rod that needs to be sprayed. If it is determined that it is, proceed to step S26; if it is determined that it is not, proceed to step S27. S26: Remove the spray head (11), the next drill rod will be installed, the next drill rod joint is fixed, wait for spraying, rotate the platform (4) to make the axis of the spray head (11) aligned with the axis of the drill rod, and execute step S3; S27: The cardiac cylinder (9) retracts to its initial length, the rotating platform (4) rotates back to its initial position, and the self-locking screw lifting platform is raised to its initial height.

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