A recycling and reuse process for oilfield slips and matching bolts and nuts

Abstract

This invention relates to a recycling and reuse process for oilfield slips and their matching bolts and nuts, belonging to the field of environmental protection technology. The process involves: first, sorting and screening to remove slips and their matching bolts and nuts with obvious appearance defects; then, degreasing and derusting the slips and their matching bolts and nuts; drying to remove water stains from the surface of the slips and their matching bolts and nuts; second, sorting the slips and their matching bolts and nuts; after the second sorting, immersion in oil for rust prevention and drying; and finally, torque testing of the slips and their matching bolts and nuts. The purpose of this invention is to improve the reuse rate of recycled slips and their matching bolts and nuts, ensure service life and quality, and save material costs.

Description

Technical Field

[0001] This invention relates to a recycling and reuse process for oilfield slips and matching bolts and nuts, belonging to the field of environmental protection technology. Background Technology

[0002] In a certain project in my country, the connection of steam injection pipelines requires the completion of tens of thousands of meters of movable steam injection pipeline connections annually, involving tens of thousands of sets of clamps and hundreds of thousands of sets of bolts and nuts of various sizes such as M22 and M24. Because the connection of movable pipelines requires the disassembly and assembly of clamps and matching bolts and nuts, the disassembly frequency is high and the operating environment is harsh. During use, clamps and matching bolts and nuts are prone to deformation, damage, or surface rust and corrosion, making it impossible to guarantee connection quality for reuse. To ensure the quality of secondary connections, clamps and matching bolts and nuts need to be sorted and reprocessed before reuse. In the prior art, Chinese invention patent application number: 201910369414.4, discloses a bolt cold heading, thread rolling, and oil-scraping integrated production line process, including:

[0003] 1) Raw material pretreatment: The bolt blanks are surface treated. First, the bolt blanks are fed into a room temperature hydrochloric acid pool for immersion. Then, the bolt blanks after immersion are fed into a clean water pool for cleaning to remove the hydrochloric acid corrosion products on the surface of the bolt blanks. After cleaning and drying, lubricating oil is sprayed onto the surface of the bolt blanks.

[0004] 2) Cold heading: The bolt blanks processed above are fed into the cold heading machine by the feeder. The cold heading machine performs the first cold heading of the bolt blanks to form the general outline of the bolt head and shank. The bolt blanks are then cold-headed a second time to form the preliminary bolt head and shank. Finally, they are cold-headed a third time to completely form the bolt head and shank, forming a semi-finished bolt.

[0005] 3) Thread rolling process: The semi-finished bolts after cold heading are fed into the feeding vibrating plate by the feeding machine. The vibration of the feeding vibrating plate causes the semi-finished bolts to enter the thread rolling track and then enter the gap between the moving thread rolling plate and the stationary thread rolling plate. The moving thread rolling plate and the stationary thread rolling plate are used to roll the threads of the semi-finished bolts. The stationary thread rolling plate is fixed and the moving thread rolling plate is set opposite to the stationary thread rolling plate and moves back and forth in the direction parallel to the stationary thread rolling plate. The shank of the semi-finished bolts forms a mating thread under the mutual rolling of the moving thread rolling plate and the stationary thread rolling plate.

[0006] 4) Oil removal treatment: The threaded bolts are fed into a mixing tank containing degreasing agent by a feeder. The bolts are stirred to remove oil, so that the oil on the surface of the bolts can fully contact the degreasing agent. After degreasing, the bolts are fed into a feeder through the outlet of the mixing tank, and then into a cleaning tank for cleaning and drying. Heat treatment: The dried bolts are sent into a nitrate furnace to quench the formed bolts, and then temper the formed bolts.

[0007] 5) Surface Treatment: The bolts treated as described above are fed into a cleaning tank via a feeder for cleaning. A cleaning brush within the tank is used to scrub the surface of the bolts. After cleaning, they are rinsed with clean water and then dried in a drying oven to ensure a clean and impurity-free surface. After drying, the bolts are fed into a plating solution for hot-dip galvanizing. After hot-dip galvanizing, a vibrating feeder sends the hot-dip galvanized bolts to a cooling tank for cooling. The hot-dip galvanized bolts are then passivated, followed by cleaning and drying to obtain the finished bolts. In practice, manual processing suffers from low efficiency and inconsistent quality. Therefore, it is necessary to develop an integrated method for reusing bolts that combines sorting, cleaning, oiling, testing, and marking to improve work efficiency and ensure pipeline connection quality. Summary of the Invention

[0008] This invention provides a recycling and reuse process for oilfield slips and matching bolts and nuts, the purpose of which is to improve the reuse rate of recycled slips and matching bolts and nuts, ensure service life and quality, and save material costs.

[0009] To achieve the above objectives, this invention provides a recycling and reuse process for oilfield slips and their associated bolts and nuts, specifically including:

[0010] Step 1: Remove the slips and their matching bolts and nuts with obvious appearance defects through a single sorting process.

[0011] Step two: Degrease and remove rust from the slips and their matching bolts and nuts;

[0012] Step 3: Remove water stains from the surface of the slips and their matching bolts and nuts by drying.

[0013] Step four: perform secondary sorting of the slips and their matching bolts and nuts;

[0014] Step 5: After the secondary sorting is completed, the product is subjected to oil immersion for rust prevention and drying.

[0015] Step six: Perform torque testing on the slips and their matching bolts and nuts.

[0016] Furthermore, it also includes step seven, which involves laser marking the loading and unloading cycle number on the slips and their matching bolts and nuts.

[0017] Furthermore, step one specifically involves using an image acquisition and recognition module to collect and identify the appearance of the slips and their matching bolts and nuts, and using a sorting device to screen out slips and their matching bolts and nuts with obvious appearance defects.

[0018] Furthermore, the process of acquiring and recognizing the appearance of the cladding and its matching bolts and nuts through the image acquisition and recognition module specifically involves connecting a camera to the recognition unit, acquiring image information with the camera, and sending the image information to the recognition unit for appearance defect recognition.

[0019] Furthermore, the recognition unit uses a deep learning network to receive image information in real time and performs deep learning processing on the received image information to comprehensively process the two-dimensional coordinates, angles, flatness, and color of the target.

[0020] Furthermore, the obvious appearance defects include deformation, damage, corrosion, and cracks.

[0021] Furthermore, the degreasing and rust removal method in step two specifically involves a combination of ultrasonic waves and cleaning agents.

[0022] Furthermore, the secondary sorting in step four specifically involves selecting out the slips and their matching bolts and nuts that are free from oil stains, water stains, and rust.

[0023] Furthermore, the recycling process is completed using a recycling device, which includes an image acquisition and recognition module, a laser marking machine, a torque detector, a sorter, a PLC controller, a main control pneumatic module, a main control electrical module, a drying electrical module, an ultrasonic cleaning tank, an oil immersion drying tank, and control buttons, all mounted on an operation control console. The image acquisition and recognition module identifies appearance defects in the clamps and their matching bolts and nuts. The sorter selects clamps and their matching bolts and nuts without obvious appearance defects. These are then degreased and derusted in the ultrasonic cleaning tank, and then dried in the oil immersion drying tank. At this point, the oil immersion drying tank contains no oil. After drying, the image acquisition and recognition module performs a second sorting, placing qualified products into the oil immersion drying tank for oil immersion rust prevention and drying. Subsequently, the torque of the clamps and their matching bolts and nuts is measured. During this process, the PLC controller receives and sends signals, and the control buttons provide signals to instruct the main control pneumatic module, the main control electrical module, and the drying electrical module to drive and execute each step.

[0024] Furthermore, the ultrasonic cleaning tank is connected to a cleaning tank lifter, which is equipped with a lifting tray for supporting the clamps and their matching bolts and nuts. The lifting tray moves up and down within the ultrasonic cleaning tank under the drive of the main control pneumatic module. The oil immersion drying tank is connected to a drying tank lifter, which is equipped with a heater and a receiving tray for supporting the clamps and their matching bolts and nuts. The receiving tray moves up and down within the oil immersion drying tank under the drive of the main control pneumatic module, and the heater performs drying under the drive of the drying electrical module.

[0025] This invention discloses a recycling and reuse process for oilfield slips and matching bolts and nuts. Its beneficial effects are that it can thoroughly clean the rust and oil stains on the surface of slips and matching bolts and nuts. After cleaning, drying, oil immersion drying, torque testing and marking, qualified slips and matching bolts and nuts can be sorted out and reused. This does not affect the pipeline connection quality, does not reduce safety, and saves purchase costs and reduces production costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a top view schematic diagram of the recycling and reuse process system for the slips and matching bolts and nuts of the present invention;

[0028] Figure 2 This is a schematic diagram of the main view of the recycling and reuse process system for the slips and matching bolts and nuts of the present invention.

[0029] The diagram shows: 1. Laser marking machine; 2. Operation control console; 3. Marking bracket; 4. Oil immersion drying tank; 5. Drying tank lifter; 6. First image acquisition and recognition module; 7. First ultrasonic cleaning tank; 8. First cleaning tank lifter; 9. Second ultrasonic cleaning tank; 10. Second cleaning tank lifter; 11. Second image acquisition and recognition module; 12. Torque detector; 13. Main control pneumatic module; 14. Main control electrical module; 15. Drying electrical module. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] To further understand the invention, the technical solution will be further described below in conjunction with specific embodiments.

[0032] Example 1: This example provides a recycling and reuse process for oilfield slips and matching bolts and nuts, specifically including:

[0033] Step one involves sorting and removing clamps and their matching bolts and nuts with obvious appearance defects. Specifically, an image acquisition and recognition module captures and identifies the appearance of the clamps and their matching bolts and nuts. A sorter then removes clamps and their matching bolts and nuts with obvious appearance defects, including deformation, thread damage, severe corrosion, or cracks. The image acquisition and recognition module captures and identifies the appearance of the clamps and their matching bolts and nuts by connecting a camera to the recognition unit. The camera captures image information and sends it to the recognition unit for appearance defect identification. The recognition unit uses a deep learning network to receive image information in real time and performs deep learning processing on the received image information, comprehensively processing the two-dimensional coordinates, angles, flatness, and color of the identified target.

[0034] Step two: Degrease and remove rust from the clamps and their matching bolts and nuts; specifically, degrease and remove rust by combining ultrasonic cleaning with a cleaning agent. The cleaning agent is added to the ultrasonic cleaning tank in proportion and the temperature is raised to 50°C.

[0035] Step 3: After cleaning, place the clamps and their matching bolts and nuts in an oil-free immersion drying tank 4 to dry and remove surface water stains.

[0036] Step four: perform a second sorting of the slips and their matching bolts and nuts, and select qualified products, that is, select the slips and their matching bolts and nuts that are free of oil stains, water stains and rust.

[0037] Step 5: After the second sorting is completed, the qualified products are placed into the oil-containing immersion drying tank 4 for immersion in oil for rust prevention and drying treatment.

[0038] Step six: Perform torque testing on the clamps and their matching bolts and nuts to check whether the torque of the parts exceeds the limit, and assemble the qualified bolts and nuts for later use.

[0039] Step 7: Use a laser marking machine 1 to mark the loading and unloading cycle on the clamps and their matching bolts and nuts, that is, to indicate the number of times they are recycled and reused.

[0040] The recycling and reuse process is carried out using a recycling device, which includes an image acquisition and recognition module, a laser marking machine 1, a torque tester 12, a sorter, a PLC controller, a main control pneumatic module 13, a main control electrical module 14, a drying electrical module 15, an ultrasonic cleaning tank, an oil immersion drying tank 4, and control buttons, all mounted on the operation control console 2. The image acquisition and recognition module identifies appearance defects of the clamps and their matching bolts and nuts. The sorter selects clamps and their matching bolts and nuts without obvious appearance defects. They are then degreased and derusted in the ultrasonic cleaning tank, and then dried in the oil immersion drying tank 4. At this time, there is no oil in the oil immersion drying tank 4. After drying, the image acquisition and recognition module performs a second sorting, placing qualified products into the oil immersion drying tank 4 for oil immersion rust prevention and drying treatment. Then, the torque of the clamps and their matching bolts and nuts is tested. After the torque test is qualified, they are marked by the laser marking machine 1. Before marking, the parts are fixed on the marking bracket 3. During the process, the PLC controller receives and sends signals, and through control buttons, it instructs the main control pneumatic module 13, main control electrical module 14, and drying electrical module 15 to drive and execute each step. The main control electrical module 14 is used to complete drive photography, identification, torque detection, and laser marking. The ultrasonic cleaning tank is connected to the cleaning tank lifter, which is equipped with a lifting tray for supporting the clamps and their matching bolts and nuts. The lifting tray moves up and down within the ultrasonic cleaning tank under the drive of the main control pneumatic module 13. The oil immersion drying tank 4 is connected to the drying tank lifter 5. The oil immersion drying tank 4 is equipped with a heater and a supporting tray for supporting the clamps and their matching bolts and nuts. The supporting tray moves up and down within the oil immersion drying tank 4 under the drive of the main control pneumatic module 13, and the heater performs drying under the drive of the drying electrical module 15.

[0041] In this embodiment, the first image acquisition and recognition module 6 is used for primary sorting, and the second image acquisition and recognition module 11 is used for secondary sorting. There are two cleaning processes: a first ultrasonic cleaning tank 7 and a first cleaning tank lifter 8; a second ultrasonic cleaning tank 9 and a second cleaning tank lifter 10. By setting up two ultrasonic cleaning tanks, the degreasing and derusting process of the clamps and their matching bolts and nuts is ensured to be thoroughly completed and cleaned.

[0042] First, parts are sorted by image recognition to identify those with minor defects. Then, cleaning agent is added to the first ultrasonic cleaning tank 7 and the second ultrasonic cleaning tank 9 in proportion and heated to 50°C. The sorted and disassembled clamps, bolts, and nuts are placed into a lifting tray. The lifting device 8 of the first cleaning tank drives the lifting tray to descend, immersing the parts in the cleaning solution. The switch of the first ultrasonic cleaning tank 7 is turned on. After the first cleaning, a second cleaning is performed. Then, the cleaned parts are placed in the oil immersion drying tank 4 for drying. Afterward, the parts are sorted by image recognition again. Qualified parts are placed in the oil immersion drying tank 4 for oil immersion to prevent rust and drying. After drying, the drying tank lifting device 5 removes the parts from the oil immersion drying tank 4. Then, the torque tester 12 tests the torque of the bolts and nuts to check if they exceed the limit. Qualified bolts and nuts are assembled and ready for use. Finally, the clamps, bolts, and nuts are inserted into the marking bracket 3 for fixation. The PLC controller has pre-programmed the marking content, and automatic printing can be achieved.

[0043] Example 2: This example provides a recycling and reuse process for oilfield slips and matching bolts and nuts, specifically including:

[0044] Step one involves sorting and removing clamps and their matching bolts and nuts with obvious appearance defects. Specifically, this involves using an image acquisition and recognition module to capture and identify the appearance of the clamps and their matching bolts and nuts, and then using a sorter to remove clamps and their matching bolts and nuts with obvious appearance defects such as deformation, thread damage, severe corrosion, or cracks. The image acquisition and recognition module captures and identifies the appearance of the clamps and their matching bolts and nuts by connecting a camera to the recognition unit. The camera captures image information and sends it to the recognition unit for appearance defect identification. The recognition unit uses a deep learning network to receive image information in real time and performs deep learning processing on the received image information, comprehensively processing the two-dimensional coordinates, angles, flatness, and color of the identified target.

[0045] Step two: Degrease and remove rust from the clamps and their matching bolts and nuts; specifically, degrease and remove rust by combining ultrasonic cleaning with a cleaning agent. The cleaning agent is added to the ultrasonic cleaning tank in proportion and the temperature is raised to 45°C.

[0046] Step 3: After cleaning, place the clamps and their matching bolts and nuts in an oil-free immersion drying tank 4 to dry and remove surface water stains.

[0047] Step four: Perform secondary sorting of the slips and their matching bolts and nuts, selecting the qualified products;

[0048] Step 5: After the second sorting is completed, the qualified products are placed into the oil-containing immersion drying tank 4 for immersion in oil for rust prevention and drying treatment.

[0049] Step six: Perform torque testing on the clamps and their matching bolts and nuts to check whether the torque of the parts exceeds the limit, and assemble the qualified bolts and nuts for later use.

[0050] The recycling and reuse process is carried out using a recycling device, which includes an image acquisition and recognition module, a torque detector 12, a sorter, a PLC controller, a main control pneumatic module 13, a main control electrical module 14, a drying electrical module 15, an ultrasonic cleaning tank, an oil immersion drying tank 4, and control buttons, all mounted on the operation control console 2. The image acquisition and recognition module identifies appearance defects in the clamps and their matching bolts and nuts. The sorter selects clamps and their matching bolts and nuts without obvious appearance defects. These are then degreased and derusted in the ultrasonic cleaning tank, and then dried in the oil immersion drying tank 4 (which is empty of oil at this stage). After drying, the image acquisition and recognition module performs a second sorting, placing qualified products into the oil immersion drying tank 4 for oil immersion for rust prevention and drying. Finally, torque is measured on the clamps and their matching bolts and nuts. During the process, the PLC controller receives and sends signals, instructing the main control pneumatic module 13, the main control electrical module 14, and the drying electrical module 15 to drive and execute each step via the control buttons. The main control electrical module 14 is used to perform driving, photographing, recognition, and torque detection. The ultrasonic cleaning tank is connected to a cleaning tank lifter. The cleaning tank lifter is equipped with a lifting tray for supporting the clamps and their matching bolts and nuts. The lifting tray moves up and down within the ultrasonic cleaning tank under the drive of the main control pneumatic module 13. The oil immersion drying tank 4 is connected to a drying tank lifter 5. The oil immersion drying tank 4 is equipped with a heater and a supporting tray for supporting the clamps and their matching bolts and nuts. The supporting tray moves up and down within the oil immersion drying tank 4 under the drive of the main control pneumatic module 13. The heater performs drying under the drive of the drying electrical module 15.

[0051] In this embodiment, the first image acquisition and recognition module 6 is used for primary sorting, the second image acquisition and recognition module 11 is used for secondary sorting, and there is one cleaning process, namely the first ultrasonic cleaning tank 7 and the first cleaning tank lift 8.

[0052] First, parts are sorted by image recognition to identify parts with inconspicuous appearance defects. Then, cleaning agent is added to the first ultrasonic cleaning tank 7 according to the ratio and the temperature is raised to 45°C. The sorted and disassembled clamps, bolts and nuts are placed into the lifting tray. The first cleaning tank lifter 8 drives the lifting tray to descend, so that the parts are immersed in the cleaning solution and the first ultrasonic cleaning tank 7 is turned on. Then, the cleaned parts are placed into the oil immersion drying tank 4 for drying. After that, the parts are sorted by image recognition again. The qualified parts are placed into the oil immersion drying tank 4 for oil immersion rust prevention and drying. After drying, the drying tank lifter 5 removes the parts from the oil immersion drying tank 4. Then, the torque tester 12 tests the torque of the bolts and nuts to check whether they exceed the limit. The qualified bolts and nuts are assembled and ready for use.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A process for recycling and reusing oilfield slips and matching bolts and nuts, characterized in that, Step 1: Remove the slips and their matching bolts and nuts with obvious appearance defects through a single sorting process. Step two: Degrease and remove rust from the slips and their matching bolts and nuts; Step 3: Remove water stains from the surface of the slips and their matching bolts and nuts by drying. Step four: perform secondary sorting of the slips and their matching bolts and nuts; Step 5: After the secondary sorting is completed, the product is subjected to oil immersion for rust prevention and drying. Step six: Perform torque testing on the slips and their matching bolts and nuts.

2. The recycling and reuse process for oilfield slips and matching bolts and nuts according to claim 1, characterized in that, Step one involves using an image acquisition and recognition module to collect and identify the appearance of the slips and their matching bolts and nuts, and then using a sorting device to screen out slips and their matching bolts and nuts that have obvious appearance defects.

3. The recycling and reuse process for oilfield slips and matching bolts and nuts according to claim 2, characterized in that, The image acquisition and recognition module collects and recognizes the appearance of the cladding and its matching bolts and nuts. Specifically, the camera is connected to the recognition unit, the camera collects image information, and the image information is sent to the recognition unit for appearance defect recognition.

4. The recycling and reuse process for oilfield slips and matching bolts and nuts according to claim 3, characterized in that, The recognition unit uses a deep learning network to receive image information in real time and performs deep learning processing on the received image information to comprehensively process the two-dimensional coordinates, angles, flatness, and color of the target.

5. The recycling and reuse process for oilfield slips and matching bolts and nuts according to claim 2, characterized in that, Obvious appearance defects include deformation, damage, corrosion, and cracks.

6. The recycling and reuse process for oilfield slips and matching bolts and nuts according to claim 1, characterized in that, In step two, the degreasing and rust removal method specifically combines ultrasonic waves and cleaning agents.

7. The recycling and reuse process for oilfield slips and matching bolts and nuts according to claim 1, characterized in that, The secondary sorting in step four involves selecting the slips and their matching bolts and nuts that are free of oil stains, water stains, and rust.

8. The recycling and reuse process for oilfield slips and matching bolts and nuts according to claim 1, characterized in that, The recycling and reuse process is completed using a recycling and processing device, which includes an image acquisition and recognition module, a laser marking machine (1), a torque detector (12), a sorter, a PLC controller, a main control pneumatic module (13), a main control electrical module (14), a drying electrical module (15), an ultrasonic cleaning tank, an oil immersion drying tank (4), and control buttons, all mounted on the operation control console (2). The image acquisition and recognition module identifies the appearance defects of the slips and their matching bolts and nuts, and the sorter filters out slips and their matching bolts and nuts that do not have obvious appearance defects. Then, the product is degreased and derusted by an ultrasonic cleaning tank, and then dried by an oil immersion drying tank (4). At this time, there is no oil in the oil immersion drying tank (4). After drying, the image acquisition and recognition module performs a second sorting and puts the qualified products into the oil immersion drying tank (4) for oil immersion rust prevention and drying treatment. Then, the torque of the clasp and its matching bolts and nuts is detected. During the process, the PLC controller receives and sends signals, and gives signals through the control buttons to instruct the main control pneumatic module (13), the main control electrical module (14), and the drying electrical module (15) to drive and execute each step.

9. The recycling and reuse process for oilfield slips and matching bolts and nuts according to claim 8, characterized in that, The ultrasonic cleaning tank is connected to the cleaning tank lifter. The cleaning tank lifter is equipped with a lifting tray for supporting the clasps and their matching bolts and nuts. The lifting tray moves up and down in the ultrasonic cleaning tank under the drive of the main control pneumatic module (13). The oil immersion drying tank (4) is connected to the drying tank lifter (5). The oil immersion drying tank (4) is equipped with a heater and a supporting tray for supporting the clasps and their matching bolts and nuts. The supporting tray moves up and down in the oil immersion drying tank (4) under the drive of the main control pneumatic module (13). The heater dries the clasps under the drive of the drying electrical module (15).

10. A recycling and reuse process for oilfield slips and matching bolts and nuts according to any one of claims 1 to 8, characterized in that, It also includes step seven, which involves laser marking the loading and unloading cycle number on the slips and their matching bolts and nuts.

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