Chamfer cutting device for pipe orifice of continuous oil pipe

Abstract

The utility model relates to the technical field of coiled tubing operation, and discloses a coiled tubing orifice chamfer cutting device, which comprises a fixed barrel, a fixed sleeve, a fixed sleeve, a fixed sleeve, a fixed sleeve, a fixed sleeve, a fixed sleeve, a fixed sleeve and a fixed sleeve, wherein the front end of the fixed sleeve is connected with the front end of a coiled tubing to be cut; the front center rod is rotatably arranged in the fixed cylinder in a penetrating manner, a reamer seat is arranged at the front end of the front center rod, and a reamer used for cutting the coiled tubing is arranged in the reamer seat; the front center rod is sleeved with the return spring, one end of the return spring abuts against the end face of the reamer seat, and the other end of the return spring abuts against the spring fixing seat. The rear center rod is detachably connected with the front center rod and provided with an adjusting device which is used for abutting against the rear end face of the fixed cylinder so as to adjust the compression amount of the return spring, and the adjusting device can move in the axis direction of the rear center rod; when the rear center rod is rotated, the rear center rod drives the front center rod to rotate synchronously, so that the reamer cuts the pipe opening at the front end of the coiled tubing to form a chamfer, and therefore, the pipe opening is regular in shape, high in cutting quality and high in cutting efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous oil pipe operation, and more specifically to a continuous oil pipe pipe mouth chamfering cutting device. Background Art

[0002] In order to realize the function of the coiled tubing, the coiled tubing and the corresponding coiled tubing tools must be connected, among which the connector installed at the front end of the coiled tubing is particularly important. The installation sealing of the coiled tubing and the connector is the key to affecting the construction quality of the coiled tubing.

[0003] In order to achieve the sealing between the continuous oil pipe and the connector, a sealing ring is provided in the connector. The front end port of the continuous oil pipe is flat. In order to prevent the sealing ring from being damaged or even cut off when the continuous oil pipe is inserted into the connector, thereby affecting the sealing performance of the two, a certain chamfer needs to be polished at the front end of the continuous oil pipe when installing the connector.

[0004] Since most continuous tubing operations take place in oil and gas rich areas, the use of power tools is prohibited in these areas. Currently, manual files are used to correct the front end chamfers, which takes a long time and has low efficiency. In addition, the pipe mouth is not polished neatly. There is still the problem of damage to the front end of the continuous tubing or cutting off the sealing ring, resulting in high risks and accident rates in continuous tubing construction operations.

[0005] In summary, how to improve the cutting efficiency and cutting quality of the chamfer of the coiled tubing pipe mouth is a problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a continuous oil pipe nozzle chamfering cutting device. After the rotation of the center rod, the reamer can cut the front end nozzle of the continuous oil pipe to form a chamfer. The nozzle shape is regular, the cutting quality is high, and the cutting efficiency is high.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A coiled tubing pipe chamfering cutting device, comprising:

[0009] A fixed cylinder, the front end of which is used to connect with the front end of the coiled tubing to be cut, and the rear end of which is provided with a spring fixing seat;

[0010] A front center rod is rotatably inserted into the fixed cylinder, and a reamer seat is provided at the front end thereof. A reamer for cutting the coiled tubing is provided in the reamer seat;

[0011] A return spring is sleeved outside the front center rod, one end of which abuts against the end surface of the reamer seat, and the other end abuts against the spring fixing seat;

[0012] A rear center rod, detachably connected to the front center rod, provided with an adjusting device for abutting against the rear end surface of the fixed cylinder to adjust the compression amount of the return spring, wherein the adjusting device can move along the axial direction of the rear center rod;

[0013] When the rear center rod is rotated, the rear center rod drives the front center rod to rotate synchronously, so that the reamer cuts the front end of the coiled tubing.

[0014] Preferably, a plurality of positioning screw holes for installing positioning screws are provided at the front end of the fixing cylinder, and the positioning screws are inserted into the limiting pits of the coiled tubing through the positioning screw holes.

[0015] Preferably, a bearing fixing seat is provided at the rear end of the fixed cylinder, and the bearing and the spring fixing seat are both installed in the bearing fixing seat.

[0016] Preferably, it further comprises a spring positioning seat, wherein the spring positioning seat is sleeved on the front center rod, one end of the spring positioning seat abuts against the end surface of the reamer seat, and the other end of the spring positioning seat abuts against the return spring.

[0017] Preferably, the front center rod and the rear center rod are threadedly connected.

[0018] Preferably, the adjustment device comprises an adjustment positioning seat, the outer peripheral surface of the rear center rod is provided with an adjustment external thread, and the adjustment positioning seat is provided with an internal thread that matches the adjustment external thread.

[0019] Preferably, a through mounting hole for mounting the rotating rod is provided at the rear end of the rear center rod, and the axis of the mounting hole intersects with the axis of the rear center rod.

[0020] Preferably, a slot for engaging with a manual tool is provided at the rear end of the rear center rod.

[0021] When in use, first, adjust the adjustment device of the rear center rod so that the return spring has a certain amount of compression; then connect and fix the front end of the continuous oil pipe to be cut to the front end of the fixed cylinder, so that the reamer in the reamer seat of the front center rod abuts against the front end face of the continuous oil pipe; finally, rotate the rear center rod to drive the front center rod and the reamer seat to rotate synchronously, and use the reamer to cut the front end face of the continuous oil pipe to form a chamfer.

[0022] Compared with manual file correction and grinding of chamfers, the continuous oil pipe mouth chamfering cutting device provided by the utility model significantly improves the chamfering cutting efficiency, and the chamfer is formed by rotating cutting of the reamer, the pipe mouth has a regular shape and high cutting quality, thus avoiding the problem of the continuous oil pipe mouth damaging the sealing ring inside the connector and reducing the operational risks caused by poor sealing of the continuous oil pipe and the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 A schematic structural diagram of a specific embodiment of the chamfering and cutting device for a coiled tubing orifice provided by the utility model;

[0025] Figure 2 It is a structural schematic diagram of a fixed cylinder;

[0026] Figure 3 The figure is a schematic diagram of the assembly of the front and rear center rods;

[0027] Figure 4 It is the structural schematic diagram of the reamer seat;

[0028] Figure 5 is a schematic diagram of the structure of the reamer;

[0029] Figure 6 It is a structural schematic diagram of a spring locating seat and a spring fixing seat;

[0030] Figure 7 It is a schematic diagram of the structure of adjusting the positioning seat.

[0031] Figure 1-Figure 7 middle:

[0032] 01 is the continuous oil pipe; 1-fixed cylinder; 11-positioning screw hole; 12-bearing fixing seat; 2-front center rod; 21-reamer seat; 211-reamer; 22-spring positioning seat; 3-return spring; 4-spring fixing seat; 5-rear center rod; 51-adjusting external thread; 52-mounting hole; 53-slot; 6-adjusting positioning seat; 7-rotating rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The core of the utility model is to provide a continuous oil pipe pipe mouth chamfering cutting device. After the rotation of the central rod, the reamer can be driven to cut the front end pipe mouth of the continuous oil pipe to form a chamfer. The pipe mouth has a regular shape, high cutting quality and high cutting efficiency.

[0035] The utility model provides a continuous oil pipe orifice chamfering and cutting device, comprising:

[0036] A fixed cylinder 1, the front end of which is used to connect with the front end of the coiled tubing 01 to be cut to fix the coiled tubing 01, and the rear end of which is provided with a spring fixing seat 4;

[0037] The front center rod 2 is rotatably inserted into the fixed cylinder 1, and a reamer seat 21 is provided at the front end thereof. The reamer seat 21 is provided with a reamer 211 for cutting and processing the coiled tubing 01;

[0038] The return spring 3 is sleeved outside the front center rod 2, one end of which abuts against the end surface of the reamer seat 21, and the other end abuts against the spring fixing seat 4;

[0039] The rear center rod 5 is detachably connected to the front center rod 2 and is provided with an adjusting device for abutting against the rear end surface of the fixed cylinder 1 to adjust the compression amount of the return spring 3. The adjusting device can move along the axial direction of the rear center rod 5;

[0040] When the rear center rod 5 is rotated, the rear center rod 5 drives the front center rod 2 to rotate synchronously, so that the reamer 211 cuts the front end of the coiled tubing 01 .

[0041] Among them, the fixed cylinder 1 is mainly used to connect and fix the position of the front end of the coiled tubing 01 to be cut. Considering that the outer peripheral surface of the coiled tubing 01 can be formed with a plurality of limiting pits by pressing the tooling, please refer to Figure 2 The front end of the fixed cylinder 1 is provided with a plurality of positioning screw holes 11 for installing positioning screws. The positioning screws are inserted into the limiting pits of the coiled tubing 01 through the positioning screw holes 11, thereby fixing the coiled tubing 01.

[0042] In order to ensure that the axis of the coiled tubing 01 is aligned with the axis of the reamer 211, the number of the positioning screw holes 11 of the fixed cylinder 1 should be greater than or equal to six. A cylindrical surface can be positioned in space by using at least six contact points of the positioning screws and the coiled tubing 01, thereby positioning the axis of the coiled tubing 01.

[0043] Due to the structure of the pressing tooling, the limiting pits of the coiled tubing 01 are distributed spirally along its outer circumference, so the positioning screw holes 11 of the fixed cylinder 1 are usually arranged to be evenly distributed spirally along the outer circumference; the pitch and helix angle of the spiral line where the positioning screw holes 11 are located are determined according to the pitch and helix angle of the upper limit pits on the coiled tubing 01, which will not be repeated here.

[0044] Of course, the coiled tubing 01 may also be fixed and positioned by means of structures such as clamps.

[0045] The front center rod 2 is rotatably inserted into the fixed cylinder 1. In order to reduce the rotational friction between the two, preferably, a bearing fixing seat 12 is provided at the rear end of the fixed cylinder 1, and the bearing and the spring fixing seat 4 are both installed in the bearing fixing seat 12.

[0046] In order to prevent the return spring 3 from being directly pressed against the end face of the bearing, the bearing is usually arranged between the spring fixing seat 4 and the bearing fixing seat 12. The type and model of the bearing are determined according to the outer diameter size of the front center rod 2 and the inner diameter size of the fixed cylinder 1 in actual production.

[0047] A reamer seat 21 is provided at the front end of the front center rod 2. The axis of the reamer seat 21 is colinear with the axis of the front center rod 2. A reamer 211 is provided in the reamer seat 21. The reamer can be a ring reamer with an inverted cone inside. Figure 5 As shown; it can also be set to multiple reaming blades, the shape of the reaming blade can refer to the shape of the turning tool used for chamfering on a lathe.

[0048] In order to ensure that the reamer 211 is always pressed against the front end of the coiled tubing 01 during the processing, a return spring 3 is provided on the outer sleeve of the front center rod 2, one end of the return spring 3 abuts against the spring fixing seat 4 at the rear end of the fixed cylinder 1, and the other end abuts against the end surface of the reamer seat 21 relatively away from the coiled tubing 01, thereby providing the reamer seat 21 with a pressing force along the axis pointing in the direction of the coiled tubing 01.

[0049] The return spring 3 can directly abut against the end surface of the reamer seat 21, or can be Figure 1 As shown, it is in contact with the spring positioning seat 22 which is sleeved on the front center rod 2; the reamer seat 21 and the spring positioning seat 22 can be connected to the front center rod 2 by common detachable connection methods such as threaded connection and pin connection, or can be set as an integral structure with the front center rod 2, and of course can also be connected by interference fit and other methods.

[0050] The rear center rod 5 is detachably connected to the front center rod 2 to facilitate assembly of the front center rod 2 and the fixed cylinder 1; the two can be specifically connected by threaded connection, key connection, etc. When the rear center rod 5 rotates, the front center rod 2 rotates synchronously.

[0051] In order to facilitate the adjustment of the compression amount of the return spring 3, the rear center rod 5 is provided with an adjusting device for abutting against the rear end face of the fixed cylinder 1. The adjusting device can be specifically set as a limit plate, a limit cylinder, etc.; the adjusting device and the rear center rod 5 are clamped together through a slide groove and a slider, or the two are threadedly connected, or the two are only sleeved and connected, so that the adjusting device can move relative to the rear center rod 5 along the axial direction.

[0052] It should be noted that common fasteners such as fastening bolts are provided between the adjusting device and the rear center rod 5 to fix the position of the adjusting device relative to the rear center rod 5 .

[0053] The adjusting device abuts against the rear end face of the fixed cylinder 1. If the rear center rod 5 is not rotated, the axial positions of the front and rear center rods relative to the fixed cylinder 1 are fixed, and the axial position of the spring fixing seat 4 arranged in the fixed cylinder 1 is fixed. Therefore, the length of the return spring 3 is fixed, that is, the compression amount of the return spring 3 is fixed.

[0054] When the adjusting device moves along the axis of the rear center rod 5 toward the front center rod 2, the front end of the front center rod 2 is relatively close to the rear end surface of the fixed cylinder 1, so that the compression of the return spring 3 increases; conversely, when the adjusting device moves along the axis of the rear center rod 5 toward the direction away from the front center rod 2, the compression of the return spring 3 decreases.

[0055] The rear center rod 5 is used for the user to apply torque to drive the front center rod 2 to rotate. In order to facilitate the user to rotate the rear center rod 5, the rear end of the rear center rod 5 can be provided with a rotating rod 7, or connected with a manual tool such as a wrench.

[0056] Please refer to Figure 2 The rear end of the rear center rod 5 may be provided with a through mounting hole 52 for mounting the rotating rod 7. The axis of the mounting hole 52 intersects with the axis of the rear center rod 5. The length of the rotating rod 7 is greater than the outer diameter of the rear center rod 5. Compared with directly rotating the rear center rod 5, it is more labor-saving.

[0057] A slot 53 for engaging with a manual tool is provided at the rear end of the rear center rod 5. The specific shape and size of the slot 53 are determined according to the structure and size of the manual tool in actual production, and will not be described in detail here.

[0058] During assembly, first install the spring fixing seat 4 in the bearing fixing seat 12 of the fixed cylinder 1; then, sleeve the return spring 3 on the front center rod 2, and install the front center rod 2 with the return spring 3 from the oil pipe fixed end of the fixed cylinder 1, so that the end face of the front center rod 2 protrudes from the end face of the other end of the fixed cylinder 1; then connect the adjusting device and the rear center rod 5, and then connect the front and rear center rods; finally, adjust the position of the adjusting device so that the adjusting device abuts against the end face of the fixed cylinder 1.

[0059] It should be noted that, in order to prevent the return spring 3 from failing due to long-term compression, the adjustment device is usually adjusted to keep the return spring 3 in an uncompressed state when the chamfering cutting device is not in use.

[0060] When in use, first, adjust the adjustment device of the rear center rod 5 so that the return spring 3 has a certain compression amount; then connect and fix the front end of the coiled tubing 01 to be cut to the front end of the fixed cylinder 1, so that the reamer 211 in the reamer seat 21 of the front center rod 2 abuts against the front end face of the coiled tubing 01; finally, rotate the rear center rod 5 to drive the front center rod 2 and the reamer seat 21 to rotate synchronously, and use the reamer 211 to cut the front end face of the coiled tubing 01 to form a chamfer.

[0061] It should be noted that the compression amount of the return spring 3 before cutting is the initial compression amount, and the compression amount of the return spring 3 after cutting is the final compression amount. In order to keep the reamer 211 always in contact with the front end face to be processed, the values ​​of the above two compression amounts need to be greater than 0.

[0062] In this embodiment, the chamfering cutting device for the continuous oil pipe orifice significantly improves the chamfering cutting efficiency, and the chamfer is formed by the rotational cutting of the reamer 211, the pipe orifice has a regular shape and high cutting quality, thereby avoiding the problem of the continuous oil pipe 01 orifice damaging the sealing ring inside the connector, and reducing the operation risk caused by the loose sealing between the continuous oil pipe 01 and the connector.

[0063] On the basis of the above embodiment, a spring positioning seat 22 can also be provided. The spring positioning seat 22 is sleeved on the front center rod 2, one end of the spring positioning seat 22 abuts against the end surface of the reamer seat 21, and the other end of the spring positioning seat 22 abuts against the return spring 3.

[0064] In order to facilitate processing and reduce the number of parts of the chamfering cutting device, the structure and size of the spring positioning seat 22 are usually the same as those of the spring fixing seat 4. Figure 1 As shown;

[0065] Please refer to Figure 6 The spring locating seat 22 and the spring fixing seat 4 are both hollow cylindrical structures, and the outer circumference is provided with a limiting step surface for abutting against the end face of the return spring 3. The outer diameter of the small end is smaller than the inner diameter of the return spring 3, and the outer diameter of the large end is greater than or equal to the outer diameter of the return spring 3, so that the limiting step surface can be used to effectively limit the two ends of the return spring 3 in the axial direction.

[0066] On the basis of the above embodiment, an adjustment device may be provided including an adjustment positioning seat 6 , the outer peripheral surface of the rear center rod 5 is provided with an adjustment external thread 51 , and the adjustment positioning seat 6 is provided with an internal thread matching the adjustment external thread 51 .

[0067] Please refer to Figure 1 The end surface of the front center rod 2 protrudes from the end surface of the fixed cylinder 1 so that the front center rod 2 can be installed in the fixed cylinder 1 and the front and rear center rods can be connected;

[0068] The adjustment and positioning seat 6 abuts against the end surface of the fixed cylinder 1 , and only the rear center rod 5 is provided with an adjustment external thread 51 , so only one end of the adjustment and positioning seat 6 close to the rear center rod 5 is provided with an internal thread.

[0069] In order to increase the contact area between the adjustment and positioning seat 6 and the fixed cylinder 1, the outer diameter of the end of the adjustment and positioning seat 6 closer to the front center rod 2 is usually set to be larger than the outer diameter of the end of the adjustment and positioning seat 6 closer to the rear center rod 5. Figure 7 shown.

[0070] In this embodiment, the adjustment positioning seat 6 and the rear center rod 5 are threadedly connected. Compared with the sliding connection structure of the slide groove slider, the threaded connection has high adjustment accuracy, relatively simple structure, easier processing, and more convenient adjustment.

[0071] Preferably, in order to facilitate the screwing of the adjustment positioning seat 6, the outer periphery of the adjustment positioning seat 6 is provided with a screwing portion for convenient screwing, and the screwing portion can be specifically set to a triangle, a regular hexagon, etc.; in order to facilitate the use of a wrench or the like to screw the adjustment positioning seat 6, the screwing portion is usually set to a regular hexagon, such as Figure 7 shown.

[0072] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0073] The above is a detailed introduction to the continuous tubing pipe chamfering cutting device provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A coiled tubing chamfering cutting device, characterized in that: include: A fixed cylinder (1), the front end of which is used to connect with the front end of the coiled tubing (01) to be cut, and the rear end of which is provided with a spring fixing seat (4); A front center rod (2) is rotatably inserted into the fixed cylinder (1), and a reamer seat (21) is provided at its front end. A reamer (211) for cutting the coiled tubing (01) is provided in the reamer seat (21); A return spring (3) is sleeved outside the front center rod (2), one end of which abuts against the end surface of the reamer seat (21), and the other end of which abuts against the spring fixing seat (4); a rear center rod (5) detachably connected to the front center rod (2), and provided with an adjusting device for abutting against the rear end surface of the fixed cylinder (1) to adjust the compression amount of the return spring (3), wherein the adjusting device can move along the axial direction of the rear center rod (5); When the rear center rod (5) is rotated, the rear center rod (5) drives the front center rod (2) to rotate synchronously, so that the reamer (211) cuts the front end of the coiled tubing (01).

2. The coiled tubing chamfering cutting device according to claim 1, characterized in that: The front end of the fixed cylinder (1) is provided with a plurality of positioning screw holes (11) for installing positioning screws, and the positioning screws are inserted into the limiting pits of the coiled tubing (01) through the positioning screw holes (11).

3. The coiled tubing pipe chamfering cutting device according to claim 1, characterized in that: A bearing fixing seat (12) is provided at the rear end of the fixed cylinder (1), and the bearing and the spring fixing seat (4) are both installed in the bearing fixing seat (12).

4. The coiled tubing pipe chamfering cutting device according to claim 1, characterized in that: It also comprises a spring positioning seat (22), wherein the spring positioning seat (22) is sleeved on the front center rod (2), one end of the spring positioning seat (22) abuts against the end surface of the reamer seat (21), and the other end of the spring positioning seat (22) abuts against the return spring (3).

5. The coiled tubing pipe chamfering cutting device according to any one of claims 1 to 4, characterized in that: The front center rod (2) and the rear center rod (5) are threadedly connected.

6. The coiled tubing pipe chamfering cutting device according to any one of claims 1 to 4, characterized in that: The adjustment device comprises an adjustment positioning seat (6), the outer peripheral surface of the rear center rod (5) is provided with an adjustment external thread (51), and the adjustment positioning seat (6) is provided with an internal thread matching the adjustment external thread (51).

7. The coiled tubing pipe chamfering cutting device according to any one of claims 1 to 4, characterized in that: A through mounting hole (52) for mounting the rotating rod (7) is provided at the rear end of the rear center rod (5), and the axis of the mounting hole (52) intersects with the axis of the rear center rod (5).

8. The coiled tubing pipe chamfering cutting device according to any one of claims 1 to 4, characterized in that: The rear end of the rear center rod (5) is provided with a slot (53) for engaging with a manual tool.

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