Protective joint cleaning and smearing device and method

Abstract

The invention belongs to the technical field of petroleum drilling, and particularly relates to a protective joint cleaning and smearing device and method. Comprising a control system, a top drive body and a back-up wrench. A cleaning and smearing device is mounted on the back-up wrench; the top drive body drives the protection connector to rotate, and the cleaning smearing device faces the outer wall of the protection connector. The control system controls the top drive body and the back-up wrench to conduct drilling three-joint operation and controls the cleaning and smearing device to work. The cleaning and smearing device comprises a cleaning assembly and a smearing assembly; the cleaning assembly and the smearing assembly are communicated with a power system in the top drive body; the top drive body comprises a power faucet and a pipe processing device. The power faucet drives the protection connector to rotate through the spindle. The pipe processing device is used for connecting and unscrewing a drill string. The back-up wrench is located at the lower end of the pipe processing device. On the basis that the original structure of the top drive body is not changed, the overall structure is simplified, the overall operation efficiency is improved, and it is ensured that the protection connector is always kept in a clean and lubricating state when the three-joint unit is connected every time.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling, and in particular relates to a protective joint cleaning and coating device and method. Background Art

[0002] The top drive drilling rig (hereinafter referred to as top drive) is a key equipment in the drilling operations of the oil industry. The trend of unmanned use of top drive is an important way and means to accelerate the iteration and upgrading of oil and gas engineering technology equipment.

[0003] However, the frequent lifting and lowering of the drill string during the drilling process often causes the connecting threads of the top drive protection joint to wear out and fail. Currently, on-site operators are still required to manually clean and apply thread grease to the male buckle connecting the top drive conversion joint and the drill string, which greatly reduces the degree of automation of drilling work.

[0004] The protective joint is located between the top drive equipment and the drill pipe, protecting the threads of the blowout preventer at the bottom of the top drive, and performing thread type conversion and connection. Its upper thread is connected to the lower end of the lower blowout preventer, and the lower end is connected to the drill bit. It will be put on and off for a long time and is a consumable part at the drilling site. According to statistics, the downtime caused by replacing the protective joint accounts for more than 60% of the total downtime, and the cost of the protective joint accounts for a high proportion of the top drive operating cost. Before the drill string is put on, the protective joint thread needs to be cleaned and coated with appropriate thread grease on the surface of the joint thread, which is used as a lubricant and anti-wear agent between the threads. Thread grease is a paste at room temperature, with high dynamic viscosity and poor fluidity, which brings difficulties to the development of automatic spraying equipment for thread grease.

[0005] At present, most of the research on automatic thread grease spraying methods focuses on devices such as drill pipes and iron roughnecks. During the drilling operation, there is no device specifically used for spraying thread grease on top drive protection joints. For a long time, the cleaning and thread grease coating of the internal threads of the protection joints still rely on workers to complete manually, which not only causes a waste of human resources, but also causes certain economic losses due to uneven coating. Therefore, the development of a method and device specifically for automatic cleaning and coating of thread grease on the threads of top drive protection joints is of great significance for improving construction quality, reducing costs, and effectively solving the problems of thread sealing and durability of protection joints. Summary of the invention

[0006] In view of the above problems, the present invention proposes a protection joint cleaning and coating device, comprising a control system, a top drive body and a backup tong; the backup tong is equipped with a cleaning and coating device; the top drive body drives the protection joint to rotate, and the cleaning and coating device faces the outer wall of the protection joint;

[0007] The control system controls the top drive body and the backup tongs to perform drilling operations, and controls the cleaning and smearing device to work;

[0008] The cleaning and smearing device comprises a cleaning component and a smearing component; the cleaning component and the smearing component are in communication with a power system in the top drive body;

[0009] The top drive body comprises a power swivel, a pipe handling device and a drilling fluid circulation channel; the power swivel drives the protection joint to rotate through the main shaft, and the power swivel is fixedly installed on the shell of the top drive body; the pipe handling device is used to connect and unscrew the drill string, and the back-up clamp is located at the lower end of the pipe handling device; the cleaning and smearing device is driven by the back-up clamp to move to clean and oil the protection joint, thereby improving the operation efficiency of the top drive body.

[0010] Furthermore, the cleaning smearing device also includes a shell No. 1 and a driving source No. 1; the driving source No. 1 is installed on the shell No. 1, the input end of the driving source No. 1 is connected to the power system, and the output end of the driving source No. 1 is connected to the cleaning component and the smearing component; a fixing component is installed on the shell No. 1, and the fixing component is installed on the back clamp, and is detachably connected to the back clamp through the fixing component, which facilitates the installation and connection of the cleaning smearing device.

[0011] Furthermore, the cleaning component includes a No. 1 cavity and a cleaning head; the No. 1 cavity is opened inside the No. 1 shell, the input end of the No. 1 cavity is connected to the No. 1 driving source, the output end of the No. 1 cavity is connected to the cleaning head, and a No. 2 valve is installed between the No. 1 cavity and the cleaning head; and a No. 1 valve is installed between the power system and the No. 1 driving source.

[0012] Furthermore, the coating assembly includes an oiling mechanism and an oil storage tank; a No. 2 cavity is opened inside the No. 1 shell, and threaded grease is arranged in the No. 2 cavity; the oiling mechanism is installed on the outer wall of the No. 1 shell, and the oiling mechanism is connected with the No. 2 cavity; the oil storage tank is installed inside the No. 1 shell, and an oil guide pipe is connected between one end of the oil storage tank and the No. 2 cavity; an oil inlet pipe is connected to the oil storage tank; the oil storage tank is connected to the No. 1 cylinder, and a transmission assembly is arranged between the No. 1 cylinder and the No. 1 driving source; the No. 2 valve is located between the No. 2 cavity and the No. 1 driving source.

[0013] Furthermore, the power system is a pneumatic drive system, an electric drive system or a hydraulic drive system; by being able to be driven in different ways, the application range of the device is improved.

[0014] Furthermore, the cleaning head includes a telescopic component and a cleaning brush head; the input end of the telescopic component is connected to a first driving source, and the output end of the telescopic component is connected to the cleaning brush head;

[0015] The oiling mechanism comprises a telescopic rod and an oil brush; the input end of the telescopic rod is connected to a first driving source, and the output end of the telescopic rod is connected to the oil brush.

[0016] Furthermore, the cleaning head includes an air duct and an air nozzle; the input end of the air duct is connected to a driving source No. 1, and the output end of the air duct is connected to the air nozzle.

[0017] Furthermore, the cleaning and applying device comprises a No. 2 shell and a No. 3 shell; the No. 2 shell and the No. 3 shell are symmetrically mounted on both sides of the back clamp; the cleaning component is mounted on the No. 2 shell, the No. 2 shell is equipped with a No. 2 driving source, the applying component is mounted on the No. 3 shell, the No. 3 shell is equipped with a No. 3 driving source;

[0018] The input ends of the No. 2 driving source and the No. 3 driving source are connected to the power system, the output end of the No. 2 driving source is connected to the cleaning component, and the No. 3 valve is installed between the No. 2 driving source and the cleaning component; the output end of the No. 3 driving source is connected to the coating component, and the No. 4 valve is installed between the No. 3 driving source and the coating component.

[0019] The present invention provides a method for cleaning and applying a protective joint, using a protective joint cleaning and applying device as described in any one of the above, specifically comprising the following steps:

[0020] After the stand drilling is completed, the top drive body is separated from the drill string;

[0021] The top drive body rises, and the control system controls the backup clamp to drive the cleaning and smearing device to move upward relative to the protection joint;

[0022] The control system controls the power system to supply power to the cleaning and applying device;

[0023] The cleaning and applying device cleans and applies lubricating substances to the protective joint;

[0024] The top drive body stops rising and connects to the stand to start drilling operations.

[0025] Furthermore, the cleaning and applying device cleans and applies lubricating material to the protective joint, specifically comprising the following steps:

[0026] The backup tong drives the cleaning assembly to move to a position facing the protection joint thread, and the control system starts the top drive body to drive the protection joint to rotate; the control system starts the cleaning assembly;

[0027] The back-up clamp drives the coating component to move to a position facing the thread of the protection joint, and controls the start-up of the coating component.

[0028] Beneficial Effects

[0029] The beneficial effects of the present invention compared to the prior art are as follows:

[0030] 1. The present application integrates the cleaning and smearing device with the top drive body and the backup tongs, thereby simplifying the overall structure while ensuring that the original structure of the top drive body remains unchanged, and also improving the overall operating efficiency, ensuring that the protective joint is always kept clean and lubricated each time a stand is connected.

[0031] 2. This application is closely integrated with the process flow of connecting stand drilling in on-site drilling operations. The present invention can automatically complete the cleaning and thread grease application of the protective joint in the working gap between the top drive body detaching from the drill pipe and connecting the stand, thereby achieving the goal of multi-tasking in parallel in drilling rig operation.

[0032] 3. The present application effectively solves the potential safety hazard caused by manual application of grease. Through automated operation, the application of the present method does not require an additional rotary application mechanism or robotic arm components. The automatic cleaning and lubrication of the protective joint threads can be achieved by utilizing the rotational rising posture change of the main shaft and the protective joint when the top drive body rises. This method simplifies the structure of the device and contributes to the automation and lightweighting of drilling rig equipment.

[0033] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A simplified diagram of a cleaning and applying device in an embodiment of the present invention is shown.

[0036] Figure 2 The overall front view of the embodiment of the present invention is shown.

[0037] Figure 3 Shows Figure 2 A partial enlarged view of the bottom of the mid-back clamp.

[0038] Figure 4 A cross-sectional view of a cleaning and applying device in an embodiment of the present invention is shown.

[0039] Figure 5 A schematic diagram of the structure of the first embodiment of the present invention is shown.

[0040] Figure 6It shows a connection diagram in the third embodiment of the present invention.

[0041] Figure 7 It shows a connection diagram in the fourth embodiment of the present invention.

[0042] Figure 8 A flow chart of the method in Embodiment 5 of the present invention is shown.

[0043] In the figure, 1. Power faucet; 2. Pipe handling device; 3. Back-up clamp;

[0044] 4. Cleaning and applying device; 41. Housing No. 1; 42. Driving source No. 1;

[0045] 43. Cleaning assembly; 432. Cleaning head; 4321. Telescopic assembly; 4322. Cleaning brush head; 4323. Air guide tube; 4324. Air nozzle;

[0046] 44. Coating assembly; 441. Oiling mechanism; 4411. Telescopic rod; 4412. Oil brush; 442. Oil storage tank; 444. Oil guide pipe; 445. Oil inlet pipe; 446. No. 1 cylinder; 447. Transmission assembly;

[0047] 45. Fixing assembly; 46. No. 2 housing; 47. No. 3 housing; 48. No. 2 driving source; 49. No. 3 driving source;

[0048] 5. Valve No. 2. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the drilling process of the present application, after completing one stand drilling, the operation enters the stand connection process; the top drive body is separated from the drill string and begins to rise; during the rising process of the top drive body, the back-up clamp is controlled to rise to a corresponding position synchronously with the protection joint; the power faucet is used to drive the main shaft to rotate, thereby driving the protection joint to rotate, and during the rotation of the protection joint, the cleaning component and the coating component clean and apply thread grease to the protection joint.

[0051] This application provides a protective joint cleaning and coating device, reference Figure 1 , Figure 2 and Figure 3, including a control system, a top drive body and a backup tong 3; a cleaning smearing device 4 is installed on the backup tong 3; the top drive body drives the protection joint to rotate, and the cleaning smearing device 4 faces the outer wall of the protection joint;

[0052] The cleaning and smearing device 4 includes a cleaning component 43 and a smearing component 44; the cleaning component 43 and the smearing component 44 are connected to the power system in the top drive body;

[0053] The top drive body includes a power swivel 1 and a pipe handling device 2; the power swivel 1 drives the protection joint to rotate through the main shaft; the pipe handling device 2 is used to connect and breakout the drill string, and the backup clamp 3 is located at the lower end of the pipe handling device 2. Figure 2 a in the figure is a drilling fluid circulation channel; the back-up tong 3 is used for assisting the root connection operation in the drilling operation. The back-up tong 3 is not installed with the main shaft. The power system drives the clamping and loosening posture changes. Therefore, it does not move when the main shaft rotates, and the make-up and break-out operations can be completed at any time and position by clamping the drill pipe joint.

[0054] During the implementation process, the power system on the top drive body provides sufficient power source to the cleaning component 43 and the coating component 44; during the drilling operation, the cleaning coating device 4 does not contact the drill string and the protection joint, and does not affect the normal drilling work; after completing the root drilling in sequence, the operation enters the root connection process; the top drive is separated from the drill string and starts to rise;

[0055] After the protection joint is shackled, the top drive body starts to rise, and the operator controls the back-up clamp 3 to move up and down independently. The back-up clamp 3 drives the cleaning coating device 4 to move relative to the protection joint, first making the cleaning component 43 automatically align with the thread of the protection joint; start the cleaning component 43, so that the cleaning component 43 is close to the protection joint, and then start the main shaft rotation of the top drive body, the main shaft drives the protection joint to rotate, and the cleaning component 43 cooperates with the rotation of the protection joint to clean the surface of the protection joint; after the cleaning is completed, the back-up clamp 3 drives the cleaning coating device 4 to continue to rise, so that the coating component 44 is aligned with the protection joint thread, and the coating component 44 is started. At a certain speed, the coating thickness is set according to the operation requirements to ensure that the coating is uniform and covers all the threads of the protection joint; after completing the cleaning of the protection joint and applying the thread grease, the top drive body continues to rise until it reaches the designated position for connecting the stand and starts to connect the stand; as the connection between the stand and the drill string is completed, the drilling rig proceeds to the next drilling;

[0056] In the continuous drilling operation, when the top drive body rises to prepare for connecting the next stand, the cleaning and coating device 4 completes the work during the rising process of the top drive body;

[0057] The present application integrates the cleaning smearing device 4 with the top drive body and the back-up clamp 3, thereby simplifying the overall structure while ensuring that the original structure of the top drive body remains unchanged, and also improving the overall operating efficiency, ensuring that the protective joint is always kept clean and lubricated each time a stand is connected.

[0058] Example 1, reference Figure 4 and Figure 5 The cleaning and smearing device 4 also includes a No. 1 housing 41 and a No. 1 driving source 42; the No. 1 driving source 42 is installed on the No. 1 housing 41, the input end of the No. 1 driving source 42 is connected to the power system, and the output end of the No. 1 driving source 42 is connected to the cleaning component 43 and the smearing component 44; the No. 1 housing 41 is installed with a fixing component 45, and the fixing component 45 is installed on the back-up clamp 3. The fixing component 45 can cooperate with the No. 1 housing 41 through a connecting pin and a fixing pin to fix the cleaning and smearing device 4 on the back-up clamp 3, ensuring that when the top drive body rises, the cleaning and smearing device 4 can rise smoothly relative to the protection joint to complete the entire cleaning and smearing operation.

[0059] The cleaning component 43 includes a cavity No. 1 and a cleaning head 432; the cavity No. 1 is opened inside the shell No. 1 41, the input end of the cavity No. 1 is connected to the driving source No. 1 42, the output end of the cavity No. 1 is connected to the cleaning head 432, and a valve No. 2 5 is installed between the cavity No. 1 and the cleaning head 432; a valve No. 1 is installed between the power system and the driving source No. 1 42.

[0060] The cleaning head 432 includes an air guide tube 4323 and an air nozzle 4324 ; the input end of the air guide tube 4323 is connected to the first driving source 42 , and the output end of the air guide tube 4323 is connected to the air nozzle 4324 .

[0061] The coating component 44 includes an oiling mechanism 441 and an oil storage tank 442; a No. 2 cavity is opened inside the No. 1 shell 41, and thread compound is arranged in the No. 2 cavity; the oiling mechanism 441 is installed on the outer wall of the No. 1 shell 41, and the oiling mechanism 441 is connected with the No. 2 cavity; the oil storage tank 442 is installed inside the No. 1 shell 41, and an oil guide pipe 444 is connected between one end of the oil storage tank 442 and the No. 2 cavity; the oil storage tank 442 is connected with an oil inlet pipe 445; the oil storage tank 442 is connected with a No. 1 cylinder 446, and a transmission component 447 is arranged between the No. 1 cylinder 446 and the No. 1 driving source 42; the No. 2 valve 5 is located between the No. 2 cavity and the No. 1 driving source 42.

[0062] When the top drive detaches from the drill pipe and rises, the operator controls the back-up clamp 3 to start moving down slowly; the power system is a hydraulic system, and two oil channels are provided between the power system and the back-up clamp 3, and the No. 1 valve connected to the two oil channels is a normally closed shuttle valve; when the No. 1 valve is opened, the No. 2 valve 5 is in the open state of the cleaning mode, and the No. 2 valve 5 is a two-position three-way normally closed pneumatic sequence valve or a two-position three-way normally closed pneumatic reversing valve; the No. 1 driving source 42 connected to the No. 1 valve is driven by the hydraulic oil to squeeze the air in the No. 1 cavity, and after passing through the No. 2 valve 5, the air is provided to the air nozzle 4324 through the air guide pipe 4323, and the air is sprayed from the air nozzle 4324 to the protective joint thread, to clean the protective joint thread, and through the rotation of the protective joint, the threads at various positions of the protective joint are cleaned; the distance between the air nozzle 4324 and the protective joint is set within a suitable range, while achieving the cleaning and thread grease application effect, ensuring that the back-up clamp 3 will not contact the drill pipe when moving up and down, thereby affecting the normal make-up and break-out operations.

[0063] The back clamp 3 drives the coating assembly 44 to move to a position opposite to the thread of the protection joint; the No. 1 cylinder 446 is started, and the No. 1 driving source 42 provides power to the No. 1 cylinder 446 through the transmission assembly 447, and the No. 1 cylinder 446 squeezes the thread grease in the oil storage tank 442, and the thread grease in the oil storage tank 442 enters the No. 2 cavity through the oil guide pipe 444; then the No. 2 valve 5 is controlled to be in the thread grease coating mode, and the hydraulic oil of the power system flows into the coating assembly 44 through the No. 1 driving source 42, and then passes through the spring b (according to Figure 5 As shown in the figure, the No. 2 cavity is squeezed to form a sufficiently high pressure in the No. 2 cavity, and the thread grease in the No. 2 cavity is sprayed to the protection joint through the high-pressure air nozzle, so as to automatically complete the thread grease coating of the protection joint thread; after completing the cleaning and thread grease coating, the operator controls the button in the drilling platform to close the cleaning coating device 4; at this time, the top drive will continue to rise to the root receiving position; the No. 1 valve, the No. 2 valve 5 and the No. 1 cylinder 446 are battery-driven; they can only be opened after the operator installs the battery and starts the cleaning coating device 4 during drilling operations. The cleaning coating device 4 does not require any other external force driving source except the high-pressure oil provided by the three-way pipe and the No. 1 valve (normally closed shuttle valve).

[0064] In the second embodiment, the power system is a pneumatic drive system, an electric drive system or a hydraulic drive system.

[0065] During the implementation process, the power system in the top drive can be connected to the air source inside the top drive rotating head, and the power source adopts a pneumatic drive mode; it also provides power for the cleaning and coating device 4 without affecting the normal drilling operation; when the top drive rises, the cleaning and coating device 4 is controlled to be turned on, and the gas enters the No. 1 drive source 42 through the power system, and the No. 1 drive source 42 provides power for the inside of the cleaning and coating device 4; the gas in the No. 1 cavity is pushed by the gas, and the threaded grease in the No. 2 cavity is squeezed by the gas to coat the protective joint; the control system controls to complete the cleaning and coating processes in sequence; the operator can turn off the cleaning and coating device 4 by turning off the air source switch on the operating table, and the top drive body can continue to complete the root connection operation.

[0066] Example 3, reference Figure 6 The cleaning head 432 includes a telescopic component 4321 and a cleaning brush head 4322; the input end of the telescopic component 4321 is connected to the first driving source 42, and the output end of the telescopic component 4321 is connected to the cleaning brush head 4322;

[0067] The oiling mechanism 441 includes a telescopic rod 4411 and an oil brush 4412 ; the input end of the telescopic rod 4411 is connected to the first driving source 42 , and the output end of the telescopic rod 4411 is connected to the oil brush 4412 .

[0068] During the implementation process, the cleaning component 43 and the coating component 44 use a brushing method to clean and lubricate the protective joint; by controlling the movement of the back clamp 3 and controlling the cleaning coating device 4 to start, the No. 1 cavity is squeezed by the No. 1 driving source 42, and the No. 1 cavity drives the telescopic mechanism to extend the cleaning brush head 4322. When the main shaft of the top drive body rotates to drive the protective joint to rotate, the cleaning brush head 4322 performs surrounding cleaning on the protective joint; the cleaning brush head 4322 can be made of suitable materials and shapes such as a brush or a wire brush; the length of the telescopic mechanism is set by the horizontal distance from the back clamp 3 to the protective joint; after the cleaning is completed, the No. 2 valve 5 is controlled to change the valve port, and the telescopic mechanism of the cleaning brush head 4322 is recovered due to the pressure change;

[0069] Cylinder No. 1 446 squeezes the threaded grease in the oil storage tank 442 into the No. 2 cavity, and valve No. 2 5 is converted into the output port of the coating component 44, driving the telescopic rod 4411 to extend until the oil brush 4412 touches the protective joint to apply the threaded grease; valve No. 2 5 can select a suitable two-position and three-position normally closed valve component such as a reversing valve, a sequence valve, and a pressure-stabilizing valve; before the operator turns on the cleaning and coating device 4, the cleaning brush head 4322 and the oil brush 4412 are both in a retracted state, the brush outlet on the No. 1 housing 41 remains in a sealed state, and the diameters of the telescopic rod 4411 and the oil brush 4412 remain at an appropriate size, and will not cause leakage of the threaded grease.

[0070] Example 4, reference Figure 7The cleaning and smearing device 4 includes a second housing 46 and a third housing 47; the second housing 46 and the third housing 47 are symmetrically mounted on both sides of the back clamp 3; the cleaning component 43 is mounted on the second housing 46, and a second driving source 48 is mounted on the second housing 46; the smearing component 44 is mounted on the third housing 47, and a third driving source 49 is mounted on the third housing 47;

[0071] The input ends of the No. 2 driving source 48 and the No. 3 driving source 49 are connected to the power system, the output end of the No. 2 driving source 48 is connected to the cleaning component 43, and the No. 3 valve is installed between the No. 2 driving source 48 and the cleaning component 43; the output end of the No. 3 driving source 49 is connected to the coating component 44, and the No. 4 valve is installed between the No. 3 driving source 49 and the coating component 44.

[0072] During the implementation process, the cleaning component 43 and the coating component 44 are located on both sides of the central axis of the back clamp 3; the power system provides power to the No. 2 driving source 48 and the No. 3 driving source 49. When the top drive drives the protection joint to move upward, the back drive drives the cleaning coating device 4 to move to the position corresponding to the protection joint thread. The control system drives the protection joint to rotate, and first starts the cleaning component 43. The control personnel controls the No. 3 valve to open. After the cleaning component 43 starts to clean half a circle of the protection joint thread, the coating component 44 can be started, and the No. 4 valve can be controlled to open. The coating component 44 applies thread grease to the half circle of the protection joint thread that has been cleaned; then the cleaning component 43 continues to clean the remaining half circle of the protection joint thread, and the coating component 44 and the cleaning component 43 work simultaneously, saving the time for cleaning and applying thread grease;

[0073] The coating component 44 may also be started after the cleaning component 43 cleans the threads of the protection joint for multiple turns and multiple times, so as to ensure the cleaning effect of the threads of the protection joint.

[0074] Example 5, reference Figure 8 A method for cleaning and applying a protective joint, using a protective joint cleaning and applying device as described in any one of the above, specifically comprises the following steps:

[0075] After the stand drilling is completed, the top drive body is separated from the drill string;

[0076] The top drive body rises, and the control system controls the back-up clamp 3 to drive the cleaning and smearing device 4 to move upward relative to the protection joint;

[0077] The cleaning and applying device 4 cleans and applies lubricating material to the protective joint;

[0078] The top drive body stops rising and connects to the stand to start drilling operations.

[0079] The cleaning and applying device 4 cleans and applies lubricating material to the protective joint, specifically including the following steps:

[0080] The backup clamp 3 drives the cleaning assembly 43 to move to a position facing the thread of the protection joint, and the control system starts the top drive body, which drives the protection joint to rotate through the rotation of the main shaft; the control system starts the cleaning assembly 43;

[0081] The back-up clamp 3 drives the coating assembly 44 to move to a position facing the thread of the protection joint, and controls the coating assembly 44 to start.

[0082] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A protective joint cleaning and coating device, characterized in that: It comprises a control system, a top drive body and a backup tong (3); a cleaning smearing device (4) is installed on the backup tong (3); the top drive body drives the protection joint to rotate, and the cleaning smearing device (4) faces the outer wall of the protection joint; The control system controls the top drive body and the back-up clamp (3) to perform the drilling stand operation, and controls the cleaning and smearing device (4) to work; The cleaning and smearing device (4) comprises a cleaning component (43) and a smearing component (44); the cleaning component (43) and the smearing component (44) are in communication with a power system in a top drive body; The top drive body comprises a power swivel (1) and a pipe handling device (2); the power swivel (1) drives the protection joint to rotate through the main shaft; the pipe handling device (2) is used to connect and break out the drill string, and the backup clamp (3) is located at the lower end of the pipe handling device (2).

2. A protective joint cleaning and coating device according to claim 1, characterized in that: The cleaning and smearing device (4) further comprises a first housing (41) and a first driving source (42); the first driving source (42) is mounted on the first housing (41), the input end of the first driving source (42) is connected to the power system, and the output end of the first driving source (42) is connected to the cleaning component (43) and the smearing component (44); a fixing component (45) is mounted on the first housing (41), and the fixing component (45) is mounted on the back clamp (3).

3. A protective joint cleaning and coating device according to claim 1 or 2, characterized in that: The cleaning component (43) comprises a No. 1 cavity and a cleaning head (432); the No. 1 cavity is opened inside the No. 1 shell (41); the input end of the No. 1 cavity is connected to the No. 1 driving source (42); the output end of the No. 1 cavity is connected to the cleaning head (432); a No. 2 valve (5) is installed between the No. 1 cavity and the cleaning head (432); and the No. 1 valve is installed between the power system and the No. 1 driving source (42).

4. A protective joint cleaning and coating device according to claim 3, characterized in that: The coating assembly (44) comprises an oiling mechanism (441) and an oil storage tank (442); a No. 2 cavity is provided inside the No. 1 shell (41), and thread compound is arranged inside the No. 2 cavity; the oiling mechanism (441) is installed on the outer wall of the No. 1 shell (41), and the oiling mechanism (441) is connected to the No. 2 cavity; the oil storage tank (442) is installed inside the No. 1 shell (41), and an oil guide pipe (444) is connected between one end of the oil storage tank (442) and the No. 2 cavity; an oil inlet pipe (445) is connected to the oil storage tank (442); a No. 1 cylinder (446) is connected to the oil storage tank (442), and a transmission assembly (447) is arranged between the No. 1 cylinder (446) and the No. 1 driving source (42); the No. 2 valve (5) is located between the No. 2 cavity and the No. 1 driving source (42).

5. A protective joint cleaning and coating device according to claim 1, characterized in that: Its characteristics are, The power system is a pneumatic drive system, an electric drive system or a hydraulic drive system.

6. A protective joint cleaning and coating device according to claim 4, characterized in that: Its characteristics are, The cleaning head (432) comprises a telescopic component (4321) and a cleaning brush head (4322); the input end of the telescopic component (4321) is connected to a first driving source (42), and the output end of the telescopic component (4321) is connected to the cleaning brush head (4322); The oiling mechanism (441) comprises a telescopic rod (4411) and an oil brush (4412); the input end of the telescopic rod (4411) is connected to a first driving source (42), and the output end of the telescopic rod (4411) is connected to the oil brush (4412).

7. A protective joint cleaning and coating device according to claim 3, characterized in that: The cleaning head (432) comprises an air guide tube (4323) and an air nozzle (4324); the input end of the air guide tube (4323) is connected to a first driving source (42), and the output end of the air guide tube (4323) is connected to the air nozzle (4324).

8. A protective joint cleaning and coating device according to claim 1 or 5, characterized in that: The cleaning and smearing device (4) comprises a second housing (46) and a third housing (47); the second housing (46) and the third housing (47) are symmetrically mounted on both sides of the back clamp (3); the cleaning component (43) is mounted on the second housing (46), and a second driving source (48) is mounted on the second housing (46); the smearing component (44) is mounted on the third housing (47), and a third driving source (49) is mounted on the third housing (47); The input ends of the No. 2 driving source (48) and the No. 3 driving source (49) are connected to the power system, the output end of the No. 2 driving source (48) is connected to the cleaning component (43), and a No. 3 valve is installed between the No. 2 driving source (48) and the cleaning component (43); the output end of the No. 3 driving source (49) is connected to the smearing component (44), and a No. 4 valve is installed between the No. 3 driving source (49) and the smearing component (44).

9. A method for cleaning and coating a protective joint, using a protective joint cleaning and coating device according to any one of claims 1 to 8, characterized in that: The specific steps include: After the stand drilling is completed, the top drive body is separated from the drill string; The top drive body rises, and the control system controls the back-up clamp (3) to drive the cleaning and smearing device (4) to move upward relative to the protection joint; The control system controls the power system to supply power to the cleaning and applying device (4); The cleaning and applying device (4) cleans and applies lubricating substances to the protective joint; The top drive body stops rising and connects to the stand to start drilling operations.

10. A method for cleaning and coating a protective joint according to claim 9, characterized in that: The cleaning and applying device (4) cleans and applies lubricating material to the protective joint, specifically comprising the following steps: The backup clamp (3) drives the cleaning assembly (43) to move to a position facing the thread of the protection joint, and the control system starts the top drive body to drive the protection joint to rotate; the control system starts the cleaning assembly (43); The back clamp (3) drives the coating component (44) to move to a position facing the thread of the protection joint, and controls the coating component (44) to start.

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