Well drilling pipe column length measuring and code spraying integrated device and using method

Abstract

The invention relates to the technical field of length measurement of drilling tools and casing pipes on a petroleum drilling site, in particular to a length measurement and code spraying integrated device for a drilling pipe column and a using method thereof, and the length measurement and code spraying integrated device comprises a mounting frame, a laser ranging module, a reflecting plate, a code spraying assembly and a control module. The device is reasonable and compact in structure, firstly, the mounting frame is placed on the upper sides of the multiple pipe columns, then the positioning rod is flattened and then placed on the upper side of one pipe column, the right end of the positioning rod is flush with the right end face of the female connector of the pipe column, and then the reflector is mounted on the outer side of the right end of the male connector of the pipe column; the right reflecting surface of the reflecting plate is coplanar with the section of the right end of the male joint of the tubular column; the laser ranging module uploads measured length data into the control module after working; the control module sprays the length data, the sum value information of the distance between the left side of the mounting frame and the right side of the positioning rod and the number information to the outer side of the right portion of the pipe body through the code spraying assembly, and length measurement and spray printing operation of the pipe column are completed.

Description

Technical Field

[0001] The invention relates to the technical field of measuring the length of drilling tools and casings at a petroleum drilling site, and is a drilling pipe length measuring and coding integrated device and a use method thereof. Background Art

[0002] Oil drilling is a key process in the exploration and development of underground oil and gas resources. Before drilling, it is necessary to formulate a drilling tool usage plan to reach the target formation depth according to the geological design target requirements, including the drilling tool type, quantity, specification, length and well entry sequence, which is called the well entry drilling tool combination. Among them, the drilling tool length is an important data for accurately locating the drilling depth. The total length of various well entry drilling tools is the formation depth at which the drill bit reaches the bottom of the well. Therefore, before the drilling tool enters the well, its length needs to be accurately measured, recorded, entered into a database, and marked with a serial number. During the drilling process, the drilling tool data needs to be managed and controlled in a timely manner according to the drilling conditions in order to accurately drill to the target oil and gas layer and complete the drilling depth and achieve the geological design goals.

[0003] At present, the drilling tool length measurement and coding printing technology at domestic and foreign oil drilling sites basically follows the old technology of the 1960s and 1970s, that is, manual tape measurement, manual data recording, manual data entry, and handwritten drilling tool coding, all of which are manual operations and manual work. It takes 3-4 people 1-2 days to complete the three steps of measurement and recording, data entry, and coding writing. The first step is to measure and record the drilling tool length data; the second step is to enter the recorded data into the computer to establish a measurement data table after the measurement is completed; the third step is to write the drilling tool number and length on the surface of the drilling tool with a brush.

[0004] The existing technology mainly has the following problems: 1. The measurement accuracy is affected by the stretching of the tape measure, resulting in errors in length calculation, affecting the depth calculation and formation accuracy; 2. It is easy to make mistakes in the process of manually recording data and manually entering data into the computer; 3. The handwritten data encoding is not standardized, not beautiful, not clear, and easy to be wrong; 4. The tape measure is long, and the middle part of the tape measure sags and gets stuck in the middle gap of the drill bit during the measurement, making it difficult to remove; 5. Measurement, recording, entry, and numbering are completed in steps, which takes a long time, requires a large amount of labor, and has high labor intensity; 6. Personnel need to walk on the drill bit, which poses safety hazards such as slipping, bumping, and spraining their ankles; 7. Since the measurement and numbering are not synchronized, if there is an omission during the measurement, it is impossible to find the missing one, and it is often necessary to re-measure.

[0005] The fundamental reason for the above problems is that the existing on-site drilling tool measurement, recording, input and coding processes are all manual operations. Affected by the quality of personnel and the working environment, the repeatability and consistency of the measurement results are poor, the labor intensity is high, the working hours are long, and the error rate is high.

[0006] Over the years, oil drilling technicians have also considered using new technologies to replace old technologies, and have proposed some solutions for drilling tool measurement technology. Patent document with announcement number CN204944442U discloses a system and method for automatically measuring the length of drilling tools, patent document with announcement number CN211717385U discloses a set of oil drilling and repairing drilling tools and casing length laser measuring instrument, and patent document with announcement number CN204612665U discloses a dual drill pipe length measuring device. The above solutions all lack the measurement data storage and coding printing functions, that is, they all fail to solve the problems of manual data recording and manual data entry in the prior art, which are labor-intensive and error-prone, and the handwritten data coding is not standardized, not beautiful, and error-prone, and cannot meet the actual needs of the drilling site. Summary of the invention

[0007] The present invention provides a drilling pipe length measuring and coding integrated device and a use method, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problems of low measurement accuracy, high labor intensity, lack of product quality assurance and risk of operational errors in existing drilling tool measurement.

[0008] One of the technical solutions of the present invention is achieved through the following measures: a drilling pipe length measurement and coding integrated device, including a mounting frame, a laser ranging module, a reflector, a coding assembly and a control module, a power module and a control module are fixedly installed on the inner side of the right part of the mounting frame at intervals, a laser ranging module is fixedly installed on the inner side of the left part of the mounting frame, a positioning rod for marking the starting end of the pipe string is provided on the right side of the mounting frame, a reflector for marking the ending end of the pipe string and corresponding to the laser ranging module is provided on the left side of the mounting frame, a coding assembly capable of printing length information and numbering information on the outer side of the pipe string is provided on the inner side of the mounting frame corresponding to the right side of the laser ranging module, the laser ranging module and the coding assembly are both connected to the control module, and the control module is connected to the power module.

[0009] The following is a further optimization and / or improvement of one of the above-mentioned technical solutions: A positioning groove which passes through from top to bottom can be provided on the right side of the middle part of the above-mentioned mounting frame. The inner side of the lower part of the positioning groove and the left part of the positioning rod are rotatably installed together. The cross section of the positioning rod and the cross section of the positioning groove are matching rectangles. A vertical reference rod is fixedly installed on the right side of the positioning rod.

[0010] The above-mentioned inkjet coding assembly may include a driving motor, a guide rod, a transmission belt, a base and a inkjet coding gun. The power module and the control module are fixedly installed on the inner side of the right part of the mounting frame at a front and rear interval. The driving motor is installed on the inner side of the front part of the mounting frame corresponding to the left position of the power module. A driving wheel is fixedly installed on the outer side of the lower end of the output shaft of the driving motor. A driven wheel corresponding to the driving wheel and located on the right side of the laser ranging module is rotatably installed on the inner side of the left part of the base. The driving wheel and the driven wheel are connected together through a transmission belt. A left and right guide rod is fixedly installed on the inner side of the rear of the mounting frame corresponding to the rear position of the transmission belt. The rear part of the base is slidably installed on the outer side of the guide rod, the front side of the base is fixedly installed with the rear of the transmission belt, the inner side of the base and the outer side of the lower part of the inkjet coding gun are fixedly installed together, and the inkjet coding gun and the driving motor are both connected to the control module.

[0011] The above may also include a first wireless communication module, a second wireless communication module and a host computer. The first wireless communication module is fixedly installed on the inner side of the rear part of the mounting frame corresponding to the rear position of the control module. The control module and the power module are both connected to the first wireless communication module, the first wireless communication module is connected to the second wireless communication module, and the second wireless communication module is connected to the host computer.

[0012] A fixing plate can be fixedly mounted on the lower side of the reflector. An arc-shaped fixing groove which runs through the left and right sides and opens downward is arranged on the lower side of the fixing plate. Chamfer structures are arranged on the front and rear sides of the fixing plate.

[0013] The second technical solution of the present invention is achieved by the following measures: The method for using the drilling pipe length measurement and coding integrated device comprises the following steps: Step 1: placing the mounting frame on the upper side of multiple pipe columns; Step 2: Place the reference rod on the right side of the female connector of one of the pipe strings to be tested, and pull the mounting bracket so that the left side of the reference rod is in coplanar contact with the right end surface of the female connector of the pipe string to be tested; Step 3, placing the fixing plate on the upper side of the pipe column and making the outer side of the right part of the male joint of the pipe column to be tested be sleeved in the fixing groove, and making the right side of the reflective plate coplanar with the right end section of the male joint of the pipe column to be tested; Step 4, the laser ranging module is operated through the control module, and the measured length data is uploaded to the control module after the laser ranging module operates, and the sum of the length data and the distance between the left side of the mounting frame and the left side of the reference rod is uploaded to the host computer for storage via the first wireless communication module and the second wireless communication module in the control module; Step 5: The host computer sends a printing instruction to the control module through the second wireless communication module and the first wireless communication module, and the control module starts the driving motor to drive the inkjet printer to print the number information and length information of the pipe string to be tested on the outer side of the right part of the pipe body of the pipe string to be tested; Step 6: Repeat steps 1 to 5 to complete the length measurement and printing operation of multiple pipes.

[0014] The present invention has a reasonable and compact structure. First, the mounting frame is placed on the upper side of multiple pipe columns. Then, the positioning rod is flattened and placed on the upper side of one of the pipe columns, and the right end of the positioning rod is flush with the right end face of the female joint of the pipe column. Then, the reflective plate is installed on the outer side of the right end of the male joint of the pipe column, and the right reflective surface of the reflective plate is coplanar with the cross-section of the right end of the male joint of the pipe column. After the laser ranging module works, the measured length data is uploaded to the control module. The control module prints the length data, the sum of the distance between the left side of the mounting frame and the right side of the positioning rod, and the numbering information on the outer side of the right part of the pipe body through the inkjet component, thereby completing the length measurement and printing operation of the pipe column. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is a schematic diagram of the top view of the structure of Example 1 when in use.

[0016] Attached Figure 2 It is a schematic diagram of the front cross-sectional structure of the mounting frame in the first embodiment.

[0017] Attached Figure 3 It is a schematic diagram of the right side cross-sectional structure of the reflector in the first embodiment.

[0018] Attached Figure 4 This is a circuit block diagram of Embodiment 1.

[0019] The codes in the accompanying drawings are: 1 is a mounting frame, 2 is a laser ranging module, 3 is a reflector, 4 is a control module, 5 is a power module, 6 is a positioning rod, 7 is a reference rod, 8 is a driving motor, 9 is a guide rod, 10 is a transmission belt, 11 is a base, 12 is a coding gun, 13 is a driving wheel, 14 is a driven wheel, 15 is a fixing plate, 16 is a tube body, 17 is a male connector, and 18 is a female connector. DETAILED DESCRIPTION

[0020] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0021] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0022] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figures 1 to 4As shown, the drilling pipe length measurement and coding integrated device and the use method thereof include a mounting frame 1, a laser ranging module 2, a reflector 3, a coding assembly and a control module 4. A power module 5 and a control module 4 are fixedly installed at intervals on the inner side of the right portion of the mounting frame 1, a laser ranging module 2 is fixedly installed on the inner side of the left portion of the mounting frame 1, a positioning rod 6 for marking the starting end of the pipe string is provided on the right side of the mounting frame 1, a reflector 3 for marking the ending end of the pipe string and corresponding to the laser ranging module 2 is provided on the left side of the mounting frame 1, a coding assembly capable of printing length information and numbering information on the outer side of the pipe string is provided on the inner side of the mounting frame 1 corresponding to the right side of the laser ranging module 2, the laser ranging module 2 and the coding assembly are both connected to the control module 4, and the control module 4 is connected to the power module 5.

[0023] According to the requirements, the laser distance measuring module 2 is the existing well-known DHT-70 online laser distance measuring instrument, the reflector 3 is the existing well-known laser distance measuring calibration board, and the control module 4 is the existing well-known STM32 single chip microcomputer. The pipe column includes a male connector 17, a pipe body 16 and a female connector 18 fixed together from left to right. When measuring the length of the pipe column, first place the mounting frame 1 on the upper side of multiple pipe columns, so that the measuring mounting frame 1 can be more stable, and then the positioning rod 6 is flattened and placed on the upper side of one of the pipe columns, and the right end of the positioning rod 6 is flush with the right end face of the female connector 18 of the pipe column, and then the reflector 3 is installed on the outside of the right end of the male connector 17 of the pipe column, and the right reflective surface of the reflector 3 is flush with the right end of the male connector 17 of the pipe column. The cross sections are coplanar, and the laser ranging module 2 is operated through the control module 4. After the laser ranging module 2 is operated, the measured length data is uploaded to the control module 4. The control module 4 prints the length data, the sum of the distance between the left side of the mounting frame 1 and the right side of the positioning rod 6, and the numbering information on the right outer side of the pipe body 16 through the inkjet component. By repeating the above steps, the length measurement and printing operations of multiple pipe columns can be completed. The present invention has a reasonable and compact structure, is easy to use, and has the characteristics of high measurement accuracy, low labor intensity, and low risk of operating errors.

[0024] According to actual needs, the above-mentioned drilling pipe length measurement and coding integrated device and use method can be further optimized and / or improved: Embodiment 2: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, a positioning groove is provided on the right side of the middle of the mounting frame 1, which runs through from top to bottom. The inner side of the lower part of the positioning groove and the left part of the positioning rod 6 are rotatably mounted together. The cross section of the positioning rod 6 and the cross section of the positioning groove are matching rectangles. A vertical reference rod 7 is fixedly mounted on the right side of the positioning rod 6.

[0025] According to the requirements, the cross section of the reference rod 7 is rectangular. During use, by setting the positioning groove, the positioning rod 6 is stored in the positioning groove for transportation, and the positioning rod 6 is turned over and flattened for measurement. After the left side of the reference rod 7 is in coplanar contact with the right end of the female connector 18 of the pipe string, the starting end of the pipe string can be marked, which is convenient for measuring the length of the pipe string.

[0026] Embodiment 3: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown in Figure 4, the inkjet coding assembly includes a driving motor 8, a guide rod 9, a transmission belt 10, a base 11 and a inkjet coding gun 12. The power module 5 and the control module 4 are fixedly installed on the inner side of the right part of the mounting frame 1 at a front and rear interval. The driving motor 8 is installed on the inner side of the front part of the mounting frame 1 corresponding to the left position of the power module 5. A driving wheel 13 is fixedly installed on the outer side of the lower end of the output shaft of the driving motor 8. A driven wheel 14 corresponding to the driving wheel 13 and located on the right side of the laser ranging module 2 is rotatably installed on the inner side of the left part of the base 11. The driving wheel 13 and the driven wheel 14 are connected together through the transmission belt 10. A left and right guide rod 9 is fixedly installed on the inner side of the rear part of the mounting frame 1 corresponding to the rear position of the transmission belt 10. The rear part of the base 11 is slidably installed on the outer side of the guide rod 9. The front side of the base 11 is fixedly installed with the rear of the transmission belt 10. The inner side of the base 11 and the outer side of the lower part of the inkjet coding gun 12 are fixedly installed together. The inkjet coding gun 12 and the driving motor 8 are both connected to the control module 4.

[0027] According to the requirements, the driving wheel 13 and the driven wheel 14 are both known synchronous pulleys, the transmission belt 10 is a known synchronous belt, the base 11 can be a rectangular frame, the rear of the base 11 is provided with a left and right through guide hole matching the guide rod 9, the middle outer side of the guide rod 9 is sleeved in the guide hole, and the inkjet printer 12 is a known EBS-260 portable handheld inkjet printer. During use, through such a setting, after the distance measurement module is finished, the control module 4 enables the inkjet printer 12 and the drive motor 8 to start working, and print the length (length data, the sum of the distance between the left side of the mounting frame 1 and the right side of the positioning rod 6) information and specification information of the pipe column on the right outer side of the pipe body 16, reducing the labor intensity of manual marking.

[0028] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 , 4 As shown, it also includes a first wireless communication module, a second wireless communication module and a host computer. The first wireless communication module is fixedly installed on the inner side of the rear part of the mounting frame 1 corresponding to the rear position of the control module 4, the control module 4 and the power module 5 are both connected to the first wireless communication module, the first wireless communication module is connected to the second wireless communication module, and the second wireless communication module is connected to the host computer.

[0029] According to the requirements, the first wireless communication module and the second wireless communication module are the existing well-known GPRS communication modules, and the host computer is the existing well-known computer. In the process of use, through such a setting, it is convenient to count the lengths of batches of pipe strings and perform coding marking, and management is more convenient.

[0030] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 1 , 3 As shown, a fixing plate 15 is fixedly installed on the lower side of the reflector 3. An arc-shaped fixing groove which passes through the lower side of the fixing plate 15 and opens downward is provided. The front and rear sides of the fixing plate 15 are both provided with chamfered structures.

[0031] According to the requirements, the reflector 3 is in an inverted L shape. By setting the fixing groove, the reflector 3 can be stably placed on the upper side of the pipe column to prevent the reflector 3 from tipping over during the measurement process to affect the measurement of the pipe column length. By setting the chamfer structure, the fixing plate 15 can be inserted into the upper side of the pipe columns placed in parallel to avoid the mutual influence between the pipe column to be measured and the pipe column at the adjacent position.

[0032] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figures 1 to 4 As shown, the method for using the drilling pipe length measurement and coding integrated device includes the following steps: Step 1: placing the mounting frame 1 on the upper side of multiple pipe columns; Step 2: Place the reference rod 7 to the right of the female connector 18 of one of the pipe strings to be tested, and pull the mounting frame 1 so that the left side of the reference rod 7 is in coplanar contact with the right end surface of the female connector 18 of the pipe string to be tested; Step 3: Place the fixing plate 15 on the upper side of the pipe column and make the outer right side of the male connector 17 of the pipe column to be tested be sleeved in the fixing groove, and make the right side of the reflector 3 coplanar with the right end section of the male connector 17 of the pipe column to be tested; Step 4: The laser distance measuring module 2 is operated through the control module 4. After the laser distance measuring module 2 is operated, the measured length data is uploaded to the control module 4. The control module 4 uploads the length data and the sum of the distance between the left side of the mounting frame 1 and the left side of the reference rod 7 to the host computer for storage via the first wireless communication module and the second wireless communication module; Step 5: The host computer sends a printing instruction to the control module 4 through the second wireless communication module and the first wireless communication module. The control module 4 starts the drive motor 8 to drive the inkjet printer 12 to print the number information and length information of the pipe string to be tested on the right outer side of the pipe body 16 of the pipe string to be tested. Step 6: Repeat steps 1 to 5 to complete the length measurement and printing operation of multiple pipes.

[0033] The present invention adopts laser measurement instead of tape measurement to complete the measurement of drilling tool length, solves the problems of tape stretching influence and calculation error, and avoids the phenomenon of tape measure being stuck in the gap of drilling tool. The laser distance measurement module 2 stores the measured data in the control module 4, and there is no need to manually record data and hand-write data, which improves data processing efficiency and avoids manual recording and entry errors. The upper computer directly reads the measurement data record from the control module 4 for numbering and printing, which replaces the manual handwriting of drilling tool numbers, ensures that the numbers are neat, standardized and clear, and reduces the error rate.

[0034] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A drilling pipe length measurement and coding integrated device, characterized in that It includes a mounting frame, a laser ranging module, a reflector, a coding assembly and a control module. A power module and a control module are fixedly installed at intervals on the inner right side of the mounting frame, a laser ranging module is fixedly installed on the inner left side of the mounting frame, a positioning rod for marking the starting end of the pipe column is provided on the right side of the mounting frame, a reflector for marking the ending end of the pipe column and corresponding to the laser ranging module is provided on the left side of the mounting frame, a coding assembly capable of printing length information and numbering information on the outer side of the pipe column is provided on the inner side of the mounting frame corresponding to the right side of the laser ranging module, the laser ranging module and the coding assembly are both connected to the control module, and the control module is connected to the power module.

2. The drilling pipe length measuring and coding integrated device according to claim 1 is characterized in that A positioning groove is provided on the right side of the middle of the mounting frame, and the lower inner side of the positioning groove and the left part of the positioning rod are rotatably mounted together. The cross-section of the positioning rod and the cross-section of the positioning groove are matching rectangles. A vertical reference rod is fixedly mounted on the right side of the positioning rod.

3. The drilling pipe length measuring and coding integrated device according to claim 1 or 2, characterized in that The inkjet coding assembly includes a driving motor, a guide rod, a transmission belt, a base and a inkjet coding gun. The power module and the control module are fixedly installed on the inner right side of the mounting frame at intervals in front and back. The driving motor is installed on the inner front side of the mounting frame corresponding to the left side of the power module. A driving wheel is fixedly installed on the outer side of the lower end of the output shaft of the driving motor. A driven wheel corresponding to the driving wheel and located on the right side of the laser ranging module is rotatably installed on the inner left side of the base. The driving wheel and the driven wheel are connected together through a transmission belt. Left and right guide rods are fixedly installed on the inner rear side of the mounting frame corresponding to the rear position of the transmission belt. The rear of the base is slidably installed on the outer side of the guide rod, the front side of the base is fixedly installed with the rear of the transmission belt, the inner side of the base and the outer side of the lower part of the inkjet coding gun are fixedly installed together, and the inkjet coding gun and the driving motor are both connected to the control module.

4. The drilling pipe length measuring and coding integrated device according to claim 1 or 2, characterized in that It also includes a first wireless communication module, a second wireless communication module and a host computer. The first wireless communication module is fixedly installed on the inner side of the rear part of the mounting frame corresponding to the rear position of the control module. The control module and the power module are both connected to the first wireless communication module, the first wireless communication module is connected to the second wireless communication module, and the second wireless communication module is connected to the host computer.

5. The drilling pipe length measuring and coding integrated device according to claim 3 is characterized in that It also includes a first wireless communication module, a second wireless communication module and a host computer. The first wireless communication module is fixedly installed on the inner side of the rear part of the mounting frame corresponding to the rear position of the control module. The control module and the power module are both connected to the first wireless communication module, the first wireless communication module is connected to the second wireless communication module, and the second wireless communication module is connected to the host computer.

6. The drilling pipe length measuring and coding integrated device according to claim 1, 2 or 5, characterized in that A fixing plate is fixedly installed on the lower side of the reflector. An arc-shaped fixing groove which runs through the left and right sides and opens downward is arranged on the lower side of the fixing plate. Chamfer structures are arranged on the front and rear sides of the fixing plate.

7. The drilling pipe length measuring and coding integrated device according to claim 3 is characterized in that A fixing plate is fixedly installed on the lower side of the reflector. An arc-shaped fixing groove which runs through the left and right sides and opens downward is arranged on the lower side of the fixing plate. Chamfer structures are arranged on the front and rear sides of the fixing plate.

8. The drilling pipe length measuring and coding integrated device according to claim 4 is characterized in that A fixing plate is fixedly installed on the lower side of the reflector. An arc-shaped fixing groove which runs through the left and right sides and opens downward is arranged on the lower side of the fixing plate. Chamfer structures are arranged on the front and rear sides of the fixing plate.

9. A method for using the drilling pipe length measurement and coding integrated device according to any one of claims 1 to 8, characterized in that The steps include: Step 1: placing the mounting frame on the upper side of multiple pipe columns; Step 2: Place the reference rod on the right side of the female connector of one of the pipe strings to be tested, and pull the mounting bracket so that the left side of the reference rod is in coplanar contact with the right end surface of the female connector of the pipe string to be tested; Step 3, placing the fixing plate on the upper side of the pipe column and making the outer side of the right part of the male joint of the pipe column to be tested be sleeved in the fixing groove, and making the right side of the reflective plate coplanar with the right end section of the male joint of the pipe column to be tested; Step 4, the laser ranging module is operated through the control module, and the measured length data is uploaded to the control module after the laser ranging module operates, and the sum of the length data and the distance between the left side of the mounting frame and the left side of the reference rod is uploaded to the host computer for storage via the first wireless communication module and the second wireless communication module in the control module; Step 5: The host computer sends a printing instruction to the control module through the second wireless communication module and the first wireless communication module, and the control module starts the driving motor to drive the inkjet printer to print the number information and length information of the pipe string to be tested on the outer side of the right part of the pipe body of the pipe string to be tested; Step 6: Repeat steps 1 to 5 to complete the length measurement and printing operation of multiple pipes.

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