A thread machining tool and method of use

Abstract

The application relates to a thread machining tool and a using method, and relates to the technical field of thread machining.The tool comprises a mounting frame, a clamping piece is arranged at one end of the mounting frame in the length direction, a tailstock is arranged at the other end of the mounting frame in the length direction, a cutting groove assembly is slidably arranged on the mounting frame, a supporting mechanism is arranged on the mounting frame, the supporting mechanism comprises a front supporting assembly and a rear supporting assembly which are arranged on the two sides of the sliding direction of the cutting groove assembly respectively, the front supporting assembly comprises a front sliding table and a front supporting ring, the front sliding table is slidably arranged on the mounting frame, the front supporting ring is arranged on the front sliding table, the rear supporting assembly comprises a rear sliding table and a rear supporting ring, the rear sliding table is slidably arranged on the mounting frame, and the rear supporting ring is arranged on the rear sliding table, so that the stability of the cutting groove of the drill collar is improved.

Description

Technical Field

[0001] This application relates to the field of thread processing, and in particular to a thread processing tool and a method of using it. Background Technology

[0002] The drill collar is located at the bottom of the drill string and is a major component of the lower drill string assembly. Its main characteristics are thick walls, resulting in greater weight and rigidity. Existing drill collars typically have threaded grooves on their outer side to assist drilling and improve drilling efficiency.

[0003] Existing thread grooves are usually machined by cutting. After fixing both ends of the drill collar along its length on the machining table, the drill collar is rotated and the cutting tool is driven to slide and cut the thread groove on the outside of the drill collar. However, because the drill collar is relatively long, when cutting the groove in the middle area of ​​the drill collar, it is easy for the drill collar to bend due to stress, which can easily lead to irregular cutting of the thread groove and affect the effect of auxiliary drilling. Summary of the Invention

[0004] To improve the stability of drill collar grooving, this application provides a thread machining tool.

[0005] The thread machining tooling provided in this application adopts the following technical solution:

[0006] A thread-cutting fixture includes a mounting frame, a clamping member mounted at one end of the mounting frame along its length, and a tailstock mounted at the other end of the mounting frame along its length. A grooving assembly is slidably mounted on the mounting frame. A support mechanism is provided on the mounting frame. The support mechanism includes a front support assembly and a rear support assembly respectively disposed on both sides of the grooving assembly along its sliding direction. The front support assembly includes a front sliding platform and a front support ring. The front sliding platform is slidably mounted on the mounting frame, and the front support ring is mounted on the front sliding platform. The rear support assembly includes a rear sliding platform and a rear support ring. The rear sliding platform is slidably mounted on the mounting frame, and the rear support ring is mounted on the rear sliding platform.

[0007] By adopting the above technical solution, adding front support components and rear support components before and after the cutting component can support the drill collar when the grooving component continues to cut the thread groove, thereby reducing the probability of the drill collar deforming when cutting the middle position of the drill collar, improving the stability of the drill collar when grooving, and improving the quality of the thread groove.

[0008] Optionally, the grooving assembly includes a grooving frame and a cutter. The grooving frame is slidably mounted on the mounting frame, and the cutter is mounted on the grooving frame. Connecting rods are provided between the front sliding platform and the grooving frame, and between the rear sliding platform and the grooving frame. Both the front sliding platform and the rear sliding platform are connected to the grooving frame through the connecting rods.

[0009] Optionally, the connecting rod includes a fixed part and a sliding part. The fixed part is fixed on the grooving frame, and the sliding part is slidably disposed on the fixed part. The sliding part slides toward the direction of approaching or away from the grooving frame, and the end of the sliding part away from the fixed part is installed on the front sliding table or the rear sliding table.

[0010] Optionally, the sliding part can be detachably mounted on the front sliding stage or the rear sliding stage.

[0011] Optionally, the front support ring includes a lower front half ring and a higher front half ring. The lower front half ring is mounted on the front sliding platform. One end of the upper front half ring is hinged to the lower front half ring, and the other end of the upper front half ring is detachably mounted on the lower front half ring. The rear support ring includes a lower rear half ring and a higher rear half ring. The lower rear half ring is mounted on the rear sliding platform. One end of the upper rear half ring is hinged to the lower rear half ring, and the other end of the upper rear half ring is detachably mounted on the lower rear half ring.

[0012] Optionally, lifting components are provided between the front support ring and the front sliding platform, and between the rear support ring and the rear sliding platform, and the lifting components drive the front support ring or the rear support ring to rise or fall.

[0013] Optionally, a rotating motor is provided between the front upper half ring and the front lower half ring, as well as between the rear upper half ring and the rear lower half ring. The rotating motor installed between the front upper half ring and the front lower half ring drives the front upper half ring to rotate on the front lower half ring, and the rotating motor installed between the rear upper half ring and the rear lower half ring drives the front and rear upper half rings to rotate on the rear lower half ring.

[0014] Optionally, the inner wall of the rear support ring is provided with soft bristles.

[0015] A method of using a thread-machining fixture, comprising the following steps:

[0016] S1: Install the drill collar and mount the drill collar onto the mounting bracket using the clamps and base;

[0017] S2: Connect the front support assembly to the grooving frame;

[0018] S3: Cutting thread grooves, rotating the drill collar while simultaneously driving the grooving frame to slide and cut grooves on the drill collar;

[0019] S4: Connect the rear support assembly. After the grooving frame slides a certain distance away from the clamping parts, connect the rear support assembly to the grooving frame.

[0020] S5: Disconnect the front support assembly. After disconnecting the front support assembly when it is close to or abutting the tailstock, continue cutting the thread groove.

[0021] S6: Remove the drill collar after the thread groove has been cut.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By adding front and rear support components before and after the cutting assembly, the drill collar can be supported when the grooving assembly continues to cut the thread groove, thereby reducing the probability of the drill collar deforming when cutting the middle position of the drill collar, improving the stability of the drill collar when grooving, and improving the quality of the thread groove.

[0024] 2. The connecting rod drives the front support assembly and the rear support assembly to slide synchronously with the grooving assembly, so that both sides of the drill collar are supported when the grooving assembly is grooving, reducing the probability of the drill collar bending and deforming under stress and improving the grooving effect;

[0025] 3. The connecting rod drives the front support assembly and the rear support assembly to slide synchronously with the grooving assembly, so that both sides of the drill collar are supported when the grooving assembly is grooving, reducing the probability of the drill collar bending and deforming under stress and improving the grooving effect;

[0026] 4. The connecting rod drives the front support assembly and the rear support assembly to slide synchronously with the grooving assembly, so that both sides of the drill collar are supported when the grooving assembly is grooving, reducing the probability of the drill collar bending and deforming under stress and improving the grooving effect;

[0027] 5. When the drill collar as a whole needs to cut thread grooves, the area held by the clamping parts cannot be cut into the thread grooves in one go. The second cut is prone to misalignment of the two thread grooves. The cutter is guided into the thread groove cut by the threaded ring on the front support ring. Then, the cutter is driven by the threaded ring on the rear support ring to perform subsequent cuts, thereby ensuring the synchronization of the two cut positions. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0029] Figure 2 yes Figure 1 A magnified view of section A in the middle.

[0030] Figure 3 yes Figure 1 A magnified view of section B in the middle.

[0031] Figure 4 This is an exploded view of the overall structure of the embodiment of this application from another perspective.

[0032] Figure 5 yes Figure 4 A magnified view of section C.

[0033] In the diagram, 1. Mounting bracket; 2. Clamping component; 3. Tailstock; 4. Grooving assembly; 41. Grooving frame; 42. Cutting blade; 5. Support mechanism; 51. Front support assembly; 511. Front sliding stage; 512. Front support ring; 5121. Front lower half ring; 5122. Front upper half ring; 52. Rear support assembly; 521. Rear sliding stage; 522. Rear support ring; 5221. Rear lower half ring; 5222. Rear upper half ring; 6. Connecting rod; 61. Fixing part; 62. Sliding part; 7. Lifting component; 8. Rotating motor; 9. Soft brush bristles; 10. Electromagnet; 11. Iron sheet. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-5 The present application will be further described with reference to specific embodiments:

[0035] First, it should be noted that in the description of this application, the use of directional terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicates the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for descriptive purposes and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of numerical quantifiers such as "first," "second," and "third" is for descriptive purposes only and should not be construed as indicating or implying relative importance. Additionally, in this application, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, interference fits, transition fits, or integral connections; they can refer to direct connections or indirect connections through an intermediate medium. Therefore, those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] This application discloses a thread machining fixture, referring to... Figure 1 , Figure 2 and Figure 3The system includes a long, narrow mounting frame 1. A clamping component 2 is mounted at one end of the mounting frame 1 along its length. In this embodiment, the clamping component 2 is a machine head with a three-jaw chuck mounted on it. The three-jaw chuck rotates on the machine head via a motor. A tailstock 3 is mounted at the other end of the mounting frame 1 along its length. A grooving assembly 4 is slidably mounted on the mounting frame 1. The grooving assembly 4 slides along the length of the mounting frame 1. A support mechanism 5 is mounted on the mounting frame 1. The support mechanism 5 includes a front support assembly 51 and a rear support assembly 52 respectively located on both sides of the grooving assembly 4 along its sliding direction. The support assembly 51 includes a front sliding platform 511 and a front support ring 512. The front sliding platform 511 is slidably mounted on the mounting frame 1, and the front support ring 512 is mounted on the front sliding platform 511. The rear support assembly 52 includes a rear sliding platform 521 and a rear support ring 522. The rear sliding platform 521 is slidably mounted on the mounting frame 1, and the rear support ring 522 is mounted on the rear sliding platform 521. The front support ring 512 is fitted onto the drill collar on the side of the grooving assembly 4 that has not yet been grooved, and the rear support ring 522 is fitted onto the drill collar on the side of the grooving assembly 4 that has been grooved.

[0037] Reference Figure 1 , Figure 4 and Figure 5The grooving assembly 4 includes a grooving frame 41 slidably mounted on the mounting frame 1 and a cutter 42 mounted on the grooving frame 41. The grooving frame 41 is driven by a rodless cylinder mounted on the frame 1, and the grooving frame 41 slides as driven by the rodless cylinder. In this embodiment, the cutter 42 is a thread cutter 42. The cutter 42 slides on the grooving frame 41 in a direction closer to or away from the drill collar via the cylinder. Connecting rods 6 are provided between the front sliding platform 511 and the grooving frame 41, and between the rear sliding platform 521 and the grooving frame 41. Both the front sliding stage 511 and the rear sliding stage 521 are connected to the grooving frame 41 via connecting rods 6. The connecting rods 6 drive the front support assembly 51 and the rear support assembly 52 to slide synchronously with the grooving assembly 4, ensuring that both sides of the drill collar are supported during grooving, reducing the probability of bending deformation of the drill collar under stress and improving the grooving effect. The connecting rod 6 includes a fixed part 61 and a sliding part 62. The fixed part 61 is fixed to the grooving frame 41, and the sliding part 62 is slidably disposed on the fixed part 61. In this embodiment, the fixed part 61 and the sliding part... All 62 are elongated rods. The sliding part 62 is inserted into the fixed part 61 and slides within the fixed part 61. The sliding part 62 is fixed to the fixed part 61 by bolts. Loosening the bolts allows the sliding part 62 to slide on the fixed part 61. The sliding part 62 slides towards or away from the grooving frame 41. The end of the sliding part 62 away from the fixed part 61 is installed on the front sliding platform 511 or the rear sliding platform 521. The sliding part 62 is detachably mounted on the front sliding platform 511 or the rear sliding platform 521. In this embodiment, the sliding part 62 and the front sliding platform 511 are detachably mounted on the front sliding platform 511 or the rear sliding platform 521. The sliding platform 511 or the rear sliding platform 521 is detachably connected by magnetic attraction. The sliding part 62 is fixed with an iron plate 11 at the end away from the fixed part 61. Both the front sliding platform 511 and the rear sliding platform 521 are equipped with electromagnets 10. By energizing the electromagnets 10, magnetic force is generated to attract and fix the sliding part 62 onto the front sliding platform 511 or the rear sliding platform 521. The sliding part 62 can adjust the length of the connecting rod 6, thereby adjusting the distance between the front support assembly 51 and the rear support assembly 52 and the grooving assembly 4 according to the length of the drill collar.

[0038] Reference Figure 1 , Figure 2 and Figure 3The front support ring 512 includes a lower front half ring 5121 and an upper front half ring 5122. The lower front half ring 5121 is mounted on the front sliding platform 511. One end of the upper front half ring 5122 is hinged to the lower front half ring 5121, and the other end of the upper front half ring 5122 is detachably mounted on the lower front half ring 5121. The rear support ring 522 includes a lower rear half ring 5221 and an upper rear half ring 5222. The lower rear half ring 5221 is mounted on the rear sliding platform 521, and the upper rear half ring 5122... One end of the upper rear half-ring 5222 is hinged to the lower rear half-ring 5221, and the other end of the upper rear half-ring 5222 is detachably mounted on the lower rear half-ring 5221. Both the front support ring 512 and the rear support ring 522 are composed of two half-rings, facilitating their placement on the drill collar. Lifting components 7 are provided between the front support ring 512 and the front sliding platform 511, and between the rear support ring 522 and the rear sliding platform 521. In this embodiment, the lifting component... The lowering component 7 uses a lifting cylinder to drive the front support ring 512 or the rear support ring 522 to rise or fall. A rotary motor 8 is installed between the front upper half ring 5122 and the front lower half ring 5121, as well as between the rear upper half ring 5222 and the rear lower half ring 5221. The rotary motor 8 installed between the front upper half ring 5122 and the front lower half ring 5121 drives the front upper half ring 5122 to rotate on the front lower half ring 5121, and the rotary motor 8 installed between the rear upper half ring 5222 and the rear lower half ring 5221 drives the front upper half ring 5122 to rotate on the front lower half ring 5121. The rotating motor 8 between 21 drives the front and rear upper half rings 5222 to rotate on the rear lower half ring 5221. The rotating motor 8 can easily open or close the front support ring 512 and the rear support ring 522, thus facilitating the opening or closing of the front support ring 512 or the rear support ring 522 during the grooving process. The lifting component 7 can remove the front support ring 512 or the rear support ring 522 from the drill collar when it is not needed.

[0039] Reference Figure 1 , Figure 2 and Figure 3The inner wall of the rear support ring 522 is detachably equipped with soft bristles 9. The soft bristles 9 can be installed only on the lower rear half-ring 5221 or the upper rear half-ring 5222, or on both. The soft bristles 9 can extend into the cut thread groove. The front support ring 512 can clean the drill collar before cutting the thread groove, reducing the impact of debris on the bottom of the thread groove. The rear support ring 522 can clean the cut thread groove, reducing the accumulation of debris in the thread groove and affecting subsequent use. Both the front support ring 512 and the rear support ring 522 can... Install a threaded ring that matches the thread groove. The front support ring 512 can rotate on the front sliding table 511, and the rear support ring 522 can rotate on the rear sliding table 521. When the drill collar as a whole needs to cut the thread groove, the area held by the clamping member 2 cannot cut the thread groove at once. The second cut is prone to misalignment of the two thread groove cuts. The cutter 42 is guided to the thread groove cut in the first cut by the guide of the threaded ring on the front support ring 512. Then, the cutter 42 is driven by the threaded ring on the rear support ring to perform subsequent cuts, thereby ensuring the synchronization of the two cut positions.

[0040] A method for using a thread-cutting fixture includes the following steps: S1: Installing the drill collar, clamping one end of the drill collar with a three-jaw chuck and abutting the other end of the three-jaw chuck with a tailstock 3, thereby fixing the drill collar on the mounting frame 1; S2: Connecting the front support assembly 51, adjusting the length of the two connecting rods 6 to the required length and then sliding the front sliding platform 511 to connect the connecting rods 6, thereby connecting the front support assembly 51 to the grooving frame 41; S3: Cutting the thread groove, rotating the drill collar by rotating the three-jaw chuck while simultaneously driving the grooving frame 41 to slide and cut the thread groove; S4: Connecting the rear support assembly 52, after the grooving frame 41 slides a certain distance away from the three-jaw chuck, the electromagnet 10 on the rear sliding platform 521 and the iron piece 11 on the sliding rod are attracted together to achieve mutual connection, thereby connecting the rear support assembly 52. Connected to the grooving frame 41; S5: Disconnect the front support assembly 51. When the front support assembly 51 approaches or abuts the tailstock 3, disconnect the front support assembly 51 and continue cutting the thread groove until the thread groove is finished; S6: Remove the drill collar. After the thread groove is cut, remove the drill collar; Since the grooving on the drill collar slides from the side near the three-jaw chuck towards the tailstock 3, the rear support ring 522 cannot be properly connected to the grooving frame 41 before the cutting begins. After the front support ring 512 abuts the tailstock 3, it will affect the continued sliding of the grooving frame 41. By connecting or disconnecting the connecting rod 6, the front support assembly 51 or the rear support assembly 52 can be connected or disconnected at the appropriate time. With the setting of the drive motor and the lifting component 7, the drive ring can be sleeved on the drill collar at the appropriate time, so that it can play a supporting role when cutting the thread groove and will not affect the normal cutting of the thread groove.

[0041] The implementation principle of this application embodiment is as follows: one end of the drill collar is clamped and fixed by a three-jaw chuck, and the other end of the three-jaw chuck is abutted by the tailstock 3, thereby fixing the drill collar on the mounting frame 1. The grooving frame 41 is moved to the position where the thread groove cutting begins. After adjusting the length of the two connecting rods 6 to the required length, the front sliding platform 511 is slid to connect the connecting rods 6 of the front sliding platform 511, and at the same time, the rear sliding platform 521 is slid to the position of the connection point with the grooving frame 41. The drill collar is rotated by rotating the three-jaw chuck, and the grooving is driven to abut against the drill collar. The grooving frame 41 is driven to slide and groove the drill collar. The grooving frame 41 slides away from the three-jaw chuck. When the electromagnet 10 on the rear sliding stage 521 is in contact with the iron plate 11 on the sliding rod, the electromagnet 10 is energized and the rear support assembly 52 is connected to the grooving frame 41 by attracting the plate through the electromagnet 10. When the front support assembly 51 approaches or abuts the tailstock 3, the front support assembly 51 is disconnected and the thread groove is cut until the thread groove is completed. After the thread groove is cut, the drill collar is removed, and the cutting of the thread groove of the drill collar is completed.

[0042] It should be noted that the above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this application. All technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the scope of the claims of this application.

Claims

1. A thread-cutting fixture, comprising a mounting frame (1), wherein a clamping member (2) is mounted at one end of the mounting frame (1) along its length, and a tailstock (3) is mounted at the other end of the mounting frame (1) along its length, and a grooving assembly (4) is slidably disposed on the mounting frame (1), characterized in that: The mounting frame (1) is provided with a support mechanism (5), which includes a front support assembly (51) and a rear support assembly (52) respectively disposed on both sides of the sliding direction of the grooving assembly (4). The front support assembly (51) includes a front sliding platform (511) and a front support ring (512). The front sliding platform (511) is slidably disposed on the mounting frame (1), and the front support ring (512) is mounted on the front sliding platform (511). The rear support assembly (52) includes a rear sliding platform (521). The rear support ring (522) is slidably mounted on the mounting frame (1), and the rear sliding stage (521) is mounted on the rear sliding stage (521); the grooving assembly (4) includes a grooving frame (41) and a cutter (42), the grooving frame (41) is slidably mounted on the mounting frame (1), and the cutter (42) is mounted on the grooving frame (41). Connecting links are provided between the front sliding stage (511) and the grooving frame (41) and between the rear sliding stage (521) and the grooving frame (41). The connecting rod (6), the front sliding table (511), and the rear sliding table (521) are all connected to the grooving frame (41) via the connecting rod (6); the connecting rod (6) includes a fixed part (61) and a sliding part (62). The fixed part (61) is fixed on the grooving frame (41), and the sliding part (62) is slidably disposed on the fixed part (61). The sliding part (62) slides toward or away from the grooving frame (41), and the end of the sliding part (62) away from the fixed part (61) is installed on the front sliding table (511) or the rear sliding table. The sliding part (62) is detachably mounted on the front sliding platform (511) or the rear sliding platform (521). An iron plate (11) is fixed at the end of the sliding part (62) away from the fixed part (61). Both the front sliding platform (511) and the rear sliding platform (521) are equipped with electromagnets (10). By energizing the electromagnets (10), magnetic force is generated to attract and fix the sliding part (62) on the front sliding platform (511) or the rear sliding platform (521). The setting of the sliding part (62) can adjust the length of the connecting rod (6).

2. The thread-machining fixture according to claim 1, characterized in that: The front support ring (512) includes a front lower half ring (5121) and a front upper half ring (5122). The front lower half ring (5121) is mounted on the front sliding platform (511). One end of the front upper half ring (5122) is hinged to the front lower half ring (5121), and the other end of the front upper half ring (5122) is detachably mounted on the front lower half ring (5121). The rear support ring (522) includes a rear lower half ring (5221) and a rear upper half ring (5222). The rear lower half ring (5221) is mounted on the rear sliding platform (521). One end of the rear upper half ring (5222) is hinged to the rear lower half ring (5221), and the other end of the rear upper half ring (5222) is detachably mounted on the rear lower half ring (5221).

3. The thread-machining fixture according to claim 2, characterized in that: Lifting components (7) are provided between the front support ring (512) and the front sliding table (511) and between the rear support ring (522) and the rear sliding table (521), and the lifting components (7) drive the front support ring (512) or the rear support ring (522) to rise or fall.

4. The thread-machining fixture according to claim 3, characterized in that: A rotating motor (8) is provided between the front upper half ring (5122) and the front lower half ring (5121), as well as between the rear upper half ring (5222) and the rear lower half ring (5221). The rotating motor (8) installed between the front upper half ring (5122) and the front lower half ring (5121) drives the front upper half ring (5122) to rotate on the front lower half ring (5121), and the rotating motor (8) installed between the rear upper half ring (5222) and the rear lower half ring (5221) drives the rear upper half ring (5222) to rotate on the rear lower half ring (5221).

5. A thread-machining fixture according to claim 4, characterized in that: The inner wall of the rear support ring (522) is provided with soft bristles (9).

6. A method of using a thread-machining fixture, which is used in the thread-machining fixture of claim 5, comprising the following steps: S1: Install the drill collar and mount the drill collar onto the mounting bracket (1) using the clamp (2) and tailstock (3); S2: Connect the front support assembly and connect the front support assembly (51) to the grooving frame (41); S3: Cut the thread groove, rotate the drill collar and drive the grooving frame (41) to slide and cut the groove on the drill collar; S4: Connect the rear support assembly, and after the grooving frame (41) slides a certain distance away from the clamping member (2), connect the rear support assembly (52) to the grooving frame (41); S5: Disconnect the front support assembly. When the front support assembly (51) approaches or abuts the tailstock (3), disconnect the front support assembly (51) and continue cutting the thread groove. S6: Remove the drill collar after the thread groove has been cut.

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