Automatic screwing and unscrewing mechanism for drill rod

Abstract

The invention belongs to the technical field of drilling tool production, and discloses an automatic drill rod screwing and unscrewing mechanism which comprises a machine base, a follow-up hydraulic centering clamping jaw, a rotary clamping jaw assembly and an automatic sliding center jacking tailstock. A drill rod is placed on the follow-up hydraulic centering clamping jaw and is clamped and fixed, the rotary clamping jaw assembly and the automatic sliding center jacking tailstock are arranged at the two ends of the drill rod respectively, the automatic sliding center jacking tailstock is used for limiting axial movement of the drill rod, and the rotary clamping jaw assembly is used for clamping a male connector phase tool. Connection or separation of the male connector phase tool and the drill rod is achieved through rotation. The mechanism further comprises a jacking height aligning assembly, a gap visual inspection device and an air blowing nozzle, and the problems of high labor intensity, low efficiency, quality defects, potential safety hazards and the like caused by manual operation can be effectively solved. The device is compact in structure, high in automation degree and suitable for production of large-diameter lengthened drill rods, machining efficiency and quality are improved, production cost is reduced, and high industrial application value is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling tool production and relates to an automatic screwing and unscrewing mechanism for a drill rod. Background Art

[0002] Drill pipe is an indispensable and important tool in the exploration and exploitation of oil, natural gas and mineral resources. With the continuous development of drilling technology, especially in deep wells, large displacement wells and complex formation conditions, the processing and use requirements of drill pipe are getting higher and higher. When processing drill pipe, especially when it involves special processing technologies such as spiral grooves and milling grooves, the phase requirements of drill pipe are very strict. Therefore, it is very important to ensure the accurate positioning of the drill pipe during the processing.

[0003] At present, due to the influence of the spiral groove of the milling groove drill rod, whether it is a through groove or a non-through groove and the phase of the drill rod, it is necessary to screw the drill rod to be processed with the male joint phase tooling before processing to ensure the normal processing of the starting point of the groove and the phase of the drill rod. This screwing method has the following shortcomings:

[0004] 1) Manually screwing the male connector phase tooling is not conducive to the realization of automated transformation and processing of the production line;

[0005] 2) Due to the manual screwing of the male joint phase tooling, the workers have to work hard, take a long time, repeat the work, and have low processing efficiency;

[0006] 3) Since the male joint phase fixture and the drill pipe are screwed together manually by vision, if the drill pipe thread size is deep and the observation position is not good, the male joint thread will be stained with iron filings, which will easily damage the thread and cause quality defects;

[0007] 4) Due to the large number of large-diameter and extended drill pipes, manual long-term screwing poses a great safety hazard. The pipe clamp bites the pipe body and easily damages the drill pipe body. Summary of the invention

[0008] In view of this, the object of the present invention is to solve the above-mentioned shortcomings and provide an automatic screwing and unscrewing mechanism for a drill rod.

[0009] In order to achieve the above object, the present invention provides the following technical solutions:

[0010] A drill rod automatic unscrewing mechanism comprises a machine base and a follow-up hydraulic centering clamp, a rotating clamp assembly and an automatic sliding top center tailstock arranged on the machine base; the drill rod is placed on the follow-up hydraulic centering clamp and is clamped and fixed by the follow-up hydraulic centering clamp, the rotating clamp assembly and the automatic sliding top center tailstock are respectively arranged at both ends of the drill rod, the automatic sliding top center tailstock is abutted against the end face of the drill rod, and is used to limit the axial movement of the drill rod; the rotating clamp assembly is used to clamp a male joint phase tooling, and connect or separate the male joint phase tooling with the drill rod by rotation.

[0011] Furthermore, a lifting height centering component is provided on one side of the follow-up hydraulic centering clamp; the lifting height centering component is used to support the drill rod and adjust the center height of the drill rod by lifting.

[0012] Furthermore, the machine base is also provided with a slide rail assembly arranged parallel to the drill rod axis, and the jacking height centering assembly is slidably arranged on the slide rail assembly and is locked in position by a locking member.

[0013] Furthermore, there are two follow-up hydraulic centering jaws, which are respectively located at the two ends of the drill rod, and each follow-up hydraulic centering jaw is correspondingly provided with a jacking height centering component.

[0014] Furthermore, the rotating jaw assembly includes a jaw telescopic assembly and a memory zeroing servo jaw. The memory zeroing servo jaw is arranged on the jaw telescopic assembly and is used to clamp and rotate the male joint phase tooling; the jaw telescopic assembly is arranged on the machine base and drives the memory zeroing servo jaw to move along the axial direction of the drill pipe.

[0015] Furthermore, the memory zeroing servo clamp is driven by a servo motor, and the tightening torque of the male connector phase fixture is controlled by the servo motor.

[0016] Furthermore, a gap visual detection device is provided on one side of the machine base. The gap visual detection device is arranged on one side of the drill pipe and is directly opposite to the connection between the male joint phase tooling and the drill pipe female joint, and is used to detect whether the male joint phase tooling and the drill pipe female joint are screwed into place.

[0017] Furthermore, the machine base is also provided with one or more tooling cache positions located on one side of the drill pipe, which are used for caching the male joint phase tooling.

[0018] Furthermore, an air blowing nozzle is also provided on the machine base, and the air blowing nozzle is used to clean dust and debris on the surface of the male connector phase tooling.

[0019] Furthermore, the machine base is also provided with a drill rod cache position located on one side of the drill rod.

[0020] The beneficial effects of the present invention are:

[0021] The automatic unscrewing mechanism for the drill rod of the present invention has a compact structure, high reliability, and long service life, and has the following advantages:

[0022] 1. It realizes the automatic unscrewing and unscrewing of drill pipes without manual operation, greatly reducing labor intensity and manufacturing costs. It is especially suitable for unscrewing and unscrewing of large-diameter and lengthened drill pipes and male joint phase tooling, and the efficiency is increased by more than 2 times. It enables the cable directional drill pipe and milling groove drill pipe to be unscrewed in place at one time, with a qualified rate of 100%, improving production efficiency and product quality.

[0023] 2. The memory zeroing servo clamp, air blowing nozzle and gap visual detection device are used to realize the detection of tightening torque and depth and the cleaning of the device, which greatly improves the service life and reliability of the screwing and unscrewing mechanism.

[0024] 3. Use the lifting height centering assembly, follow-up hydraulic centering clamp and automatic sliding center tailstock to limit the spatial position of the drill pipe, ensuring the centering and stability when unscrewing the drill pipe, and the operation is smooth, accurate and noiseless.

[0025] 4. The structural design of the equipment enables each moving part to be freely adjusted in the length direction, which is safe, reliable and easy to maintain and install.

[0026] 5. It can cooperate with the automated production line, fully meeting the needs of automated transformation of directional drill pipe production lines, improving production capacity, and helping to increase the annual output value of the production line.

[0027] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0029] Figure 1 It is a front view of the automatic screwing and unscrewing mechanism of the drill rod in the present invention.

[0030] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0031] Figure markings: 1-retractable jaw assembly; 2-rotating jaw assembly; 3-air blowing nozzle; 4-male joint phase tooling; 5-gap visual detection device; 6-lifting height centering assembly; 7-follow-up hydraulic centering jaw; 8-memory zeroing servo jaw; 9-automatic sliding top center tailstock; 10-slide rail; 11-slider; 12-machine base. DETAILED DESCRIPTION

[0032] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0033] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0034] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] See also Figures 1-2 , which is an automatic unscrewing mechanism for a drill pipe, comprising a machine base 12 and a follow-up hydraulic centering clamp 7, a rotating clamp assembly 2 and an automatic sliding top center tailstock 9 installed on the machine base 12; the drill pipe is placed on the follow-up hydraulic centering clamp 7 and clamped and fixed by the follow-up hydraulic centering clamp 7, the rotating clamp assembly 2 and the automatic sliding top center tailstock 9 are respectively installed at both ends of the drill pipe, and the automatic sliding top center tailstock 9 is abutted against the end face of the drill pipe to limit the axial movement of the drill pipe; the rotating clamp assembly 2 is used to clamp the male joint phase tooling 4, and connect or separate the male joint phase tooling 4 from the drill pipe by rotation.

[0036] A lifting height centering assembly 6 is provided on one side of the follow-up hydraulic centering jaw 7; the lifting height centering assembly 6 is used to support the drill pipe. Due to the different sizes of the products, the height of the center line of the drill pipe can be adjusted by lifting the lifting height centering assembly 6 to achieve the purpose of consistent center line height. There are two follow-up hydraulic centering jaws 7, which are respectively located at both ends of the drill pipe, and each follow-up hydraulic centering jaw 7 is correspondingly provided with a lifting height centering assembly 6.

[0037] The machine base 12 is also provided with a slide rail 10 assembly arranged parallel to the drill rod axis. The slide rail 10 assembly includes a slide rail 10 and a slider 11. The jacking height centering assembly 6 is installed on the slider 11 and slides with the slide rail 10 through the slider 11. The position of the jacking height centering assembly 6 is adjusted according to the length of the drill rod. When the position of the jacking height centering assembly 6 is adjusted, the position is locked by a locking member. The whole equipment is adapted to drill rod products of different lengths, and the applicable drill rod length range is 800-3100mm.

[0038] The rotating jaw assembly 2 includes a jaw telescopic assembly 1 and a memory zeroing servo jaw 8. The memory zeroing servo jaw 8 is installed on the jaw telescopic assembly 1 and is used to clamp and rotate the male joint phase fixture 4. The jaw telescopic assembly 1 is installed on the machine base 12 and drives the memory zeroing servo jaw 8 to move along the axial direction of the drill pipe. The memory zeroing servo jaw 8 is driven by a servo motor, and the tightening torque of the male joint phase fixture 4 is controlled by the servo motor.

[0039] A gap visual detection device 5 is provided on one side of the machine base 12. The gap visual detection device 5 is installed on one side of the drill pipe and is directly opposite to the connection between the male joint phase fixture 4 and the drill pipe female joint. It is used to detect whether the male joint phase fixture 4 and the drill pipe female joint are screwed into place.

[0040] The machine base 12 is also provided with 4 tooling cache positions located on one side of the drill rod, which are used for caching the male joint phase tooling 4. A drill rod cache position is provided outside the tooling cache position.

[0041] An air blowing nozzle 3 is also provided on the machine base 12 , and the air blowing nozzle 3 is used to clean dust and debris on the surface of the male connector phase tooling 4 .

[0042] The application of the automatic unscrewing mechanism of the drill rod in this embodiment is as follows:

[0043] The automatic unscrewing mechanism of the drill rod is located in the intelligent groove milling unit. After the robot takes the drill rod for cleaning and positioning, the drill rod needs to be installed with the male joint phase tooling 4 on the automatic unscrewing mechanism of the drill rod (the tooling is screwed into the female end of the drill rod). The tightening torque is controlled by a servo motor. The tooling can be placed in the single-head CNC groove milling machine for processing only after the tightening is completed and qualified. After the drill rod is processed, the robot grabs the drill rod and puts it into the automatic unscrewing mechanism of the drill rod to take out the male joint phase tooling 4, and cleans the tooling through the air blowing nozzle 3. After the tooling is taken out, the drill rod is unloaded, thereby accurately realizing the automatic unscrewing function of the drill rod.

[0044] The automatic drill pipe unscrewing and unscrewing mechanism does not require manual operation to unscrew the drill pipe, and after unscrewing and unscrewing, there is no need for manual handling to remove the male joint phase tooling 4, so that the cable directional drill pipe and the milling groove drill pipe can be unscrewed in place at one time with a qualified rate of 100%.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A drill rod automatic unscrewing mechanism, characterized in that: It includes a machine base and a follow-up hydraulic centering clamp, a rotating clamp assembly and an automatic sliding top center tailstock arranged on the machine base; the drill rod is placed on the follow-up hydraulic centering clamp and is clamped and fixed by the follow-up hydraulic centering clamp, the rotating clamp assembly and the automatic sliding top center tailstock are respectively arranged at both ends of the drill rod, and the automatic sliding top center tailstock is abutted against the end face of the drill rod to limit the axial movement of the drill rod; the rotating clamp assembly is used to clamp the male joint phase tooling, and connect or separate the male joint phase tooling with the drill rod by rotation.

2. The automatic screwing and unscrewing mechanism for a drill rod according to claim 1, characterized in that: A lifting height centering component is provided on one side of the follow-up hydraulic centering clamp; the lifting height centering component is used to support the drill rod and adjust the center height of the drill rod by lifting.

3. The automatic screwing and unscrewing mechanism for a drill rod according to claim 2, characterized in that: The machine base is also provided with a slide rail assembly arranged parallel to the drill rod axis, and the jacking height centering assembly is slidably arranged on the slide rail assembly and is locked in position by a locking member.

4. The automatic drill pipe unscrewing mechanism according to claim 2, characterized in that: There are two follow-up hydraulic centering clamps, which are respectively located at the two ends of the drill rod, and each follow-up hydraulic centering clamp is correspondingly provided with a jacking height centering component.

5. The automatic unscrewing mechanism for a drill rod according to claim 1, characterized in that: The rotating jaw assembly includes a jaw telescopic assembly and a memory zeroing servo jaw. The memory zeroing servo jaw is arranged on the jaw telescopic assembly and is used to clamp and rotate the male joint phase tooling; the jaw telescopic assembly is arranged on the machine base and drives the memory zeroing servo jaw to move along the axial direction of the drill pipe.

6. The automatic screwing and unscrewing mechanism for a drill rod according to claim 5, characterized in that: The memory zero adjustment servo clamp is driven by a servo motor, and the tightening torque of the male connector phase fixture is controlled by the servo motor.

7. The automatic drill pipe unscrewing mechanism according to claim 1, characterized in that: A gap visual detection device is provided on one side of the machine base. The gap visual detection device is arranged on one side of the drill pipe and is directly opposite to the connection between the male joint phase tooling and the drill pipe female joint. It is used to detect whether the male joint phase tooling and the drill pipe female joint are screwed into place.

8. The automatic drill pipe unscrewing mechanism according to claim 1, characterized in that: The machine base is also provided with one or more tooling cache positions located on one side of the drill pipe, which are used for caching the male joint phase tooling.

9. The automatic screwing and unscrewing mechanism for a drill rod according to claim 8, characterized in that: The machine base is also provided with an air blowing nozzle, which is used to clean dust and debris on the surface of the male connector phase tooling.

10. The automatic drill pipe unscrewing mechanism according to claim 1, characterized in that: The machine base is also provided with a drill rod buffer position located on one side of the drill rod.

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