A continuous oil pipe butt joint process and raw material thickening equipment

Abstract

The present invention discloses a continuous oil pipe pipe butt joint process, which belongs to the field of continuous oil pipe construction technology, and includes step 1, cleaning the end of the butt joint continuous oil pipe to remove dirt, impurities and burrs; step 2, increasing the wall thickness of the butt joint end of the continuous oil pipe by hammering the end face; step 3, processing the welding groove of the hammered continuous oil pipe joint end; step 4, aligning the ends of the butt joint two sections of continuous oil pipe joints, and welding them firmly and reliably by argon arc welding in the circumferential direction; step 5, cleaning the weld joint to remove welding burrs and weld nodules. It can effectively reduce the burning edge and collapse during welding, and improve the welding quality of pipe-to-pipe butt joint. The present invention also discloses a pipe-to-pipe butt joint raw material thickening device used in the process to hammer and thicken the end of the continuous oil pipe joint.

Description

Technical Field

[0001] The invention relates to the technical field of continuous oil pipe construction, and in particular to a continuous oil pipe pipe-to-pipe butt joint process and raw material thickening equipment thereof. Background Art

[0002] Coiled tubing operation technology is a new oil and gas field development operation technology that has emerged in recent years. As the key equipment to realize the above operation technology, the length of coiled tubing determines the depth of the wells in which the coiled tubing operation technology can operate. When the coiled tubing cannot meet the operation requirements, the usual practice is to weld two sections of coiled tubing to increase the length of the coiled tubing.

[0003] When the pipes are welded after being butted together, oxidation burning and welding collapse are likely to occur during the welding process and cannot be resolved. During finishing, grinding and other means will cause the welded edge of the pipe to become thinner, affecting the performance of the pipe-to-pipe butt joint and the compressive performance of the entire pipe body.

[0004] Therefore, it is necessary to provide a continuous tubing pipe-to-pipe butt joint process and raw material thickening equipment thereof to address the above-mentioned deficiencies. Summary of the invention

[0005] The purpose of the present invention is to provide a continuous oil pipe butt joint process and raw material thickening equipment, which can effectively reduce edge burning and collapse during welding and improve the welding quality of pipe butt joint.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The invention discloses a continuous tubing pipe-to-pipe butt joint process, comprising: step 1, cleaning the end of the butted continuous tubing joint to remove dirt, impurities and burrs; step 2, increasing the wall thickness of the butted continuous tubing joint end by hammering the end surface; step 3, processing the welding groove of the hammered continuous tubing joint end; step 4, aligning the ends of the butted two sections of continuous tubing joints, and welding them firmly and reliably in a circumferential direction by argon arc welding; step 5, cleaning the weld joint to remove welding burrs and weld nodules.

[0008] Furthermore, in step 2, the wall thickness of the end of the coiled tubing joint after hammering is 1.05 to 1.1 times the original wall thickness.

[0009] A pipe-to-pipe butt joint raw material thickening equipment is used for hammering and thickening the end of the butted continuous oil pipe joint in the above-mentioned process, comprising a first frame, a second frame and a third frame whose ends are connected in sequence, a pneumatic pick is installed on the third frame, the working end of the pneumatic pick strikes a hammering piece, and the hammering piece is arranged on the second frame. A clamping device is fixedly connected to the first frame through a clamping plate, the clamping device clamps and fixes the end of the continuous oil pipe joint and is coaxially arranged with the hammering piece, and the hammer head of the hammering piece continuously hammers the end face of the end of the continuous oil pipe joint under the drive of the pneumatic pick.

[0010] Furthermore, the hammering member is mounted on the side wall of the second frame via a rotating mechanism, and the rotating mechanism rotates under the drive of the driving unit and drives the hammering member to rotate during the hammering process, thereby hammering the end surface around the end of the continuous tubing joint.

[0011] Furthermore, the rotating mechanism includes an outer sleeve, a bearing and a driven wheel, the outer sleeve is fixedly connected to the inner side of the side wall of the second frame, one end of the shaft of the driven wheel is connected to the inner hole of the outer sleeve through the bearing, the tail rod of the hammer member is slidably connected to the inner hole of the driven wheel, and the driven wheel is connected to the driving unit through a transmission belt.

[0012] Furthermore, the hammering member also includes a lock nut and a screw rod, the screw rod is coaxially fixedly connected to the top of the tail rod, and the hammer head is installed on the screw rod and locked by the lock nut.

[0013] Furthermore, the tail rod is an equilateral prism rod, and the cross-sectional shape of the inner hole of the driven wheel is adapted to the equilateral prism rod; the lock nut specifically adopts a nylon anti-loosening locking nut.

[0014] Furthermore, the clamping device specifically adopts a hydraulic tensioning chuck.

[0015] Furthermore, an auxiliary support sleeve is connected to the first frame via a clamping plate, and the auxiliary support sleeve is coaxially arranged behind the clamping device.

[0016] Furthermore, a support leg is provided under the first frame, and a counterweight support leg is provided under the third frame, and the support leg and the counterweight support leg are supported on the ground.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are:

[0018] The present invention discloses a continuous oil pipe pipe butt joint process. By axially hammering the end of the continuous oil pipe joint, the metal body structure is cold deformed, or hammered after heating to generate thermal deformation, so that the butt joint position of the pipe joint end is thickened, and the inner diameter is controlled to remain unchanged, while the outer diameter and thickness are increased; after thickening, butt welding is performed by welding equipment to ensure that the excess height is as small as possible, and the outer surface is trimmed to the size of the original pipe diameter by grinding. Compared with the prior art, the phenomenon of edge burning and grinding thinning after pipe welding is solved. After the welding position and the heat induction zone are thickened, the strength of this position is higher, and the yield position is transferred to the original pipe position, which solves the problem that the pipe-to-pipe butt joint position is easy to break. The present invention discloses a continuous oil pipe pipe butt joint process. It can effectively reduce the edge burning and collapse during welding and improve the welding quality of pipe-to-pipe butt joint.

[0019] The present invention discloses a pipe-to-pipe butt joint raw material thickening device, which drives the hammer head of a hammering member to hammer the end face of the end of a continuous oil pipe joint through a pneumatic pick, thereby improving the hammering strength, ensuring the hammering force is uniform and consistent, ensuring a uniform thickening effect, saving manpower, and improving production efficiency.

[0020] In addition, through the setting of the rotating mechanism, the hammering piece rotates during the hammering process, hammering the end surface around the end of the continuous oil pipe joint. By controlling the motor driving speed, the end surface can be hammered evenly to ensure uniform force and uniform deformation around. Through the split structure of the hammering piece, the lock nut locks the hammer head on the screw rod, which is convenient for replacing the hammer head worn by long-term impact, and for maintenance and care; through the tail rod specifically using an equilateral prism rod and slidingly connecting in the inner hole of the driven wheel, it is convenient to transmit the torque that makes the hammering piece rotate; through the lock nut specifically using a nylon anti-loosening locking nut, it is convenient to prevent the lock nut from loosening under high-frequency hammering impact vibration, causing the hammer head to fall off. Through the setting of the auxiliary support sleeve, the tail of the continuous oil pipe that is hammered and thickened passes through the auxiliary support sleeve, which is conducive to buffering the hammering impact force, reducing the impact of the hammering impact on the tail of the continuous oil pipe, and protecting the continuous oil pipe. By adding counterweights in the counterweight legs, the front and rear ends of the equipment are balanced to avoid imbalance and overturning caused by hammering impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the process flow of pipe-to-pipe docking according to the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the pipe-to-pipe butt-joint raw material thickening device of the present invention;

[0024] Figure 3 It is a schematic diagram of the main structure of the pipe-to-pipe butt-joint raw material thickening device of the present invention;

[0025] Figure 4 It is a schematic diagram of the top view of the structure of the pipe-to-pipe butt-joint raw material thickening device of the present invention;

[0026] Figure 5 for Figure 4 AA cross-sectional structural diagram;

[0027] Figure 6 for Figure 5 A local enlarged schematic diagram of part I of FIG.

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the hammer member of the present invention;

[0029] Explanation of the accompanying drawings: 1. First frame; 101. Leg; 102. Clamp; 103. Lifting ring; 2. Second frame; 3. Third frame; 301. Counterweight leg; 4. Pneumatic pick; 5. Hammer; 501. Hammer head; 502. Lock nut; 503. Screw; 504. Tail rod; 6. Rotating mechanism; 601. Jacket; 602. Bearing; 603. Driven wheel; 7. Hydraulic tensioner; 8. Auxiliary support sleeve; 9. Motor; 901. Driving wheel; 10. Transmission belt. DETAILED DESCRIPTION

[0030] The core of the present invention is to provide a continuous oil pipe butt joint process and raw material thickening equipment, which can effectively reduce edge burning and collapse during welding and improve the welding quality of pipe-to-pipe butt joint.

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] With reference to the accompanying drawings, Figure 1 This is a schematic diagram of the process flow of pipe-to-pipe docking according to the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the pipe-to-pipe butt-joint raw material thickening device of the present invention; Figure 3 It is a schematic diagram of the main structure of the pipe-to-pipe butt-joint raw material thickening device of the present invention; Figure 4 It is a schematic diagram of the top view of the structure of the pipe-to-pipe butt-joint raw material thickening device of the present invention; Figure 5 for Figure 4 AA cross-sectional structural diagram; Figure 6 for Figure 5 A local enlarged schematic diagram of part I of FIG. Figure 7 It is a schematic diagram of the three-dimensional structure of the hammer member of the present invention.

[0033] In a specific embodiment, Figure 1 As shown, a continuous tubing pipe-to-pipe butt joint process comprises:

[0034] Step 1: Clean the end of the butt-jointed coiled tubing joint to remove dirt, impurities and burrs;

[0035] Step 2, the end of the butted coiled tubing joint is hammered to increase the wall thickness. The hammering can be done manually or with special equipment. The end of the coiled tubing joint can be heated during the hammering process.

[0036] Step 3: Process the welding groove on the end of the hammered coiled tubing joint, and use a handheld electric angle grinder to open the groove according to the welding operation specification;

[0037] Step 4, align the ends of the two connected coiled tubing joints tightly and circumferentially weld them with a argon arc welder to make them firm and reliable;

[0038] Step 5: Clean the weld area to remove welding burrs and weld nodules.

[0039] By axially hammering the end of the continuous tubing joint, the metal body structure is cold deformed, or hammered after heating to produce thermal deformation, so that the butt joint position of the end of the pipe joint is thickened, and the inner diameter is controlled by the inner core to remain unchanged, while the outer diameter and thickness are increased; after thickening, butt welding is performed by welding equipment to ensure that the excess height is as small as possible, and the outer surface is trimmed to the size of the original pipe diameter by grinding. Compared with the prior art, the phenomenon of edge burning and grinding thinning after pipe welding is solved. After the welding position and the heat induction zone are thickened, the strength of this position is higher, and the yield position is transferred to the original pipe position, which solves the problem of easy fracture at the pipe-to-pipe butt joint position. The present invention provides a continuous tubing butt joint process, which can effectively reduce the edge burning and collapse during welding and improve the welding quality of pipe-to-pipe butt joints.

[0040] Specifically, in the above step 2, the wall thickness of the end of the continuous tubing joint after hammering is 1.05 to 1.1 times the original wall thickness. A large number of experiments have shown that controlling the wall thickness of the end of the continuous tubing joint after hammering within this range can achieve better welding results at a reasonable cost.

[0041] It can be seen from Table 1 of the following comparative test that the mechanical properties of the thickened pipe-to-pipe butt joint sample processed by the process of the present invention are significantly better than those of the sample directly butted by pipe in the prior art, are closer to the original pipe, have higher welding quality, and extend the service life of the coiled tubing.

[0042]

[0043] Table 1

[0044] The present invention also discloses a pipe-to-pipe butt-joint raw material thickening device, such as Figures 2 to 5 As shown, it is used for hammering and thickening the end of the butted continuous tubing joint in the above-mentioned continuous tubing pipe-to-pipe butt joint process, including a first frame 1, a second frame 2 and a third frame 3, the ends of which are connected in sequence by bolts, a pneumatic pick 4 is installed on the third frame 3, the working end of the pneumatic pick 4 strikes a hammering piece 5, the hammering piece 5 is arranged on the second frame 2, and a clamping device is fixedly connected to the first frame 1 through a clamping plate 102, the clamping device clamps and fixes the end of the continuous tubing joint and is coaxially arranged with the hammering piece 5, and the hammer head 502 of the hammering piece 5 continuously hammers the end face of the end of the continuous tubing joint under the drive of the pneumatic pick 4.

[0045] The hammer head 502 of the hammering member 5 is driven by the pneumatic pick 4 to hammer the end surface of the continuous oil pipe joint end, which can improve the hammering strength, ensure the hammering force is uniform and consistent, ensure a uniform thickening effect, save manpower, and improve production efficiency.

[0046] In a specific embodiment of the present invention, Figures 2 to 6 As shown, the hammer 5 is mounted on the side wall of the second frame 2 through a rotating mechanism 6. The rotating mechanism 6 rotates under the drive of the driving unit and drives the hammer 5 to rotate during the hammering process, thereby hammering the end surface around the end of the continuous oil pipe joint.

[0047] Specifically, if Figure 5 and Figure 6 As shown, the rotating mechanism 6 includes a sleeve 601, a bearing 602 and a driven wheel 603. The sleeve 601 is fixedly connected to the inner side of the side wall of the second frame 2. One end of the shaft of the driven wheel 603 is connected to the inner hole of the sleeve 601 through the bearing 602. The tail rod 504 of the hammer 5 is slidably connected to the inner hole of the driven wheel 603. The wheel part of the driven wheel 603 is connected to the driving unit through a transmission belt 10. The driving unit includes a motor 9, which is installed below the second frame 2. The output end of the motor 9 is connected to the driving wheel 901, and the driving wheel 901 is connected to the driven wheel 603 through the transmission belt 10. The motor 9 specifically adopts a servo motor or a variable frequency motor, and the transmission belt 10 specifically adopts a synchronous toothed belt. The driving wheel 901 and the driven wheel 603 adopt synchronous pulleys.

[0048] By setting the rotating mechanism 6, the hammering member 5 rotates during the hammering process to hammer the end surface around the end of the coiled tubing joint. By controlling the driving speed of the motor 9, the end surface can be hammered evenly to ensure uniform force and uniform deformation around it.

[0049] In a specific embodiment of the present invention, Figure 6 and Figure 7 As shown, the hammer member 5 also includes a lock nut 502 and a screw rod 503 . The screw rod 503 is coaxially fixedly connected to the top of the tail rod 504 . The hammer head 502 is installed on the screw rod 503 and is locked by the lock nut 502 .

[0050] Specifically, if Figure 6 and Figure 7 As shown, the tail rod 504 is an equilateral prism rod, and the cross-sectional shape of the inner hole of the driven wheel 603 is adapted to the equilateral prism rod; the lock nut 502 specifically adopts a nylon anti-loosening locking nut.

[0051] By means of the split structure of the hammering member 5 and the lock nut 502, the hammer head 502 is locked on the screw rod 503, so that it is convenient to replace the hammer head 502 that has been worn out by long-term impact, and to carry out maintenance and care; by means of the tail rod 504, which is specifically an equilateral prism rod and is slidably connected in the inner hole of the driven wheel 603, it is convenient to transmit the torque that causes the hammering member 5 to rotate; by means of the lock nut 502, which is specifically a nylon anti-loosening locking nut, it is convenient to prevent the lock nut 502 from loosening under high-frequency hammering impact vibration, causing the hammer head 502 to fall off.

[0052] In a specific embodiment of the present invention, Figure 2 and Figure 5 As shown, the clamping device specifically adopts a hydraulic tensioning chuck 7, which is similar to the hydraulic pressurizing device of a pipe crimping machine. The tensioning chuck 7 is used to lock the outer wall of the coiled tubing to provide a sufficiently large locking force.

[0053] In a specific embodiment of the present invention, Figure 2 , Figure 4 and Figure 5 As shown, an auxiliary support sleeve 8 is also connected to the first frame 1 through a clamping plate 102, and the auxiliary support sleeve 8 is coaxially arranged behind the clamping device.

[0054] By setting the auxiliary support sleeve 8, the tail of the coiled tubing that is hammer-thickened passes through the auxiliary support sleeve 8, which is beneficial to buffering the hammer impact force, reducing the impact of the hammer impact on the tail of the coiled tubing, and protecting the coiled tubing.

[0055] In a specific embodiment of the present invention, Figures 2 to 5 As shown, a support leg 101 is fixedly connected to the bottom of the first frame 1, and a counterweight support leg 301 is fixedly connected to the bottom of the third frame 3. The equipment is supported on the ground by the support leg 101 and the counterweight support leg 301; the top of the first frame 1 and the tensioning chuck 7 are both provided with a lifting ring 103 for easy lifting.

[0056] By adding a counterweight inside the counterweight leg 301, the front and rear ends of the device are balanced to avoid unbalanced overturning caused by hammering and impact.

[0057] The pipe-to-pipe butt-joint raw material thickening equipment of the present invention drives the hammer head 502 of the hammering member 5 to hammer the end face of the end of the continuous tubing joint by the pneumatic pick 4, which can improve the hammering strength, ensure the hammering force is uniform and consistent, ensure the uniform thickening effect, save manpower, and improve production efficiency. In addition, through the setting of the rotating mechanism 6, the hammering member 5 rotates during the hammering process to hammer the end face around the end of the continuous tubing joint, and the driving speed of the motor 9 is controlled to evenly hammer the end face, ensuring uniform force around and uniform deformation. Through the split structure of the hammering member 5, the lock nut 502 locks the hammer head 502 on the screw 503, which is convenient for replacing the hammer head 502 that has been worn out by long-term impact, and for maintenance and care; through the tail rod 504, which is specifically an equilateral prism rod and is slidably connected in the inner hole of the driven wheel 603, it is convenient to transmit the torque that rotates the hammering member 5; through the lock nut 502, which is specifically a nylon anti-loosening locking nut, it is convenient to prevent the lock nut 502 from loosening under high-frequency hammering impact vibration, causing the hammer head 502 to fall off. Through the setting of the auxiliary support sleeve 8, the tail of the continuous oil pipe that is hammered and thickened passes through the auxiliary support sleeve 8, which is conducive to buffering the hammering impact force, reducing the impact of the hammering impact on the tail of the continuous oil pipe, and protecting the continuous oil pipe. By adding counterweights in the counterweight legs 301, the front and rear ends of the equipment are balanced to avoid imbalance and overturning caused by hammering impact.

[0058] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A coiled tubing pipe-to-pipe docking process, characterized in that: include: Step 1: Clean the end of the butt-jointed coiled tubing joint to remove dirt, impurities and burrs; Step 2, the end of the butt-jointed coiled tubing joint is hammered to increase the wall thickness; Step 3, processing a welding groove on the end of the hammered coiled tubing joint; Step 4, align the ends of the two connected coiled tubing joints and weld them firmly and reliably by argon arc welding in the circumferential direction; Step 5, clean the weld joint to remove welding burrs and weld nodules; It also includes a pipe-to-pipe butt joint raw material thickening equipment, which is used for hammering and thickening the end of the above-mentioned butt joint continuous oil pipe joint, and is characterized in that it includes a first frame (1), a second frame (2) and a third frame (3) whose ends are connected in sequence, a pneumatic pick (4) is installed on the third frame (3), and the working end of the pneumatic pick (4) strikes a hammering piece (5), and the hammering piece (5) is arranged on the second frame (2). A clamping device is fixedly connected to the first frame (1) through a clamping plate (102), and the clamping device clamps and fixes the end of the continuous oil pipe joint and is coaxially arranged with the hammering piece (5), and the hammer head (501) of the hammering piece (5) continuously hammers the end face of the end of the continuous oil pipe joint under the drive of the pneumatic pick (4); The hammering member (5) is mounted on the side wall of the second frame (2) via a rotating mechanism (6); the rotating mechanism (6) is driven by a driving unit to rotate and drive the hammering member (5) to rotate during the hammering process, thereby hammering the end surface around the end of the coiled tubing joint; The rotating mechanism (6) comprises an outer sleeve (601), a bearing (602) and a driven wheel (603); the outer sleeve (601) is fixedly connected to the inner side of the side wall of the second frame (2); one end of the shaft of the driven wheel (603) is connected to the inner hole of the outer sleeve (601) through the bearing (602); the tail rod (504) of the hammer member (5) is slidably connected to the inner hole of the driven wheel (603); and the wheel portion of the driven wheel (603) is connected to the driving unit through a transmission belt (10); The hammering member (5) further comprises a lock nut (502) and a screw rod (503), wherein the screw rod (503) is coaxially fixedly connected to the top of the tail rod (504), and the hammer head (501) is mounted on the screw rod (503) and locked by the lock nut (502).

2. The coiled tubing pipe-to-pipe docking process according to claim 1, characterized in that: In step 2, the wall thickness of the end of the coiled tubing joint after hammering is 1.05 to 1.1 times the original wall thickness.

3. The coiled tubing pipe-to-pipe docking process according to claim 1, characterized in that: The tail rod (504) is an equilateral prism rod, and the cross-sectional shape of the inner hole of the driven wheel (603) is adapted to the equilateral prism rod; the lock nut (502) is specifically a nylon anti-loosening locking nut.

4. The coiled tubing pipe-to-pipe docking process according to claim 1, characterized in that: The clamping device specifically adopts a hydraulic tensioning chuck (7).

5. The coiled tubing pipe-to-pipe docking process according to claim 1 or 4, characterized in that: An auxiliary support sleeve (8) is also connected to the first frame (1) via a clamping plate (102), and the auxiliary support sleeve (8) is coaxially arranged behind the clamping device.

6. The coiled tubing pipe-to-pipe docking process according to claim 1, characterized in that: A support leg (101) is disposed below the first frame (1), and a counterweight support leg (301) is disposed below the third frame (3); the support leg (101) and the counterweight support leg (301) are supported on the ground.

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