Oil and gas field coiled tubing paraffin removal and descaling device

Abstract

The utility model discloses an oil and gas field coiled tubing paraffin removal and descaling device, and relates to the technical field of oil tube paraffin removal and descaling, the oil and gas field coiled tubing paraffin removal and descaling device comprises a cleaning pipe and a rotating shell, the rotating shell is rotatably arranged at one end of the cleaning pipe, the rotating shell is communicated with the cleaning pipe, and L-shaped pipes are fixedly arranged on the two sides of the rotating shell; the directions of water outlets of the two L-shaped pipes are opposite, the outer wall of the end, close to the rotating shell, of the cleaning pipe is rotationally sleeved with a rotating ring, one side of the rotating ring is fixedly connected with the rotating shell through an L-shaped rod, arc-shaped scraping plates are arranged on the two sides of the rotating shell, and elastic connecting mechanisms are arranged between the arc-shaped scraping plates and the rotating ring. Sliding grooves are formed in the two sides of the cleaning pipe correspondingly, two supporting rods are arranged on the inner sides of the sliding grooves, and the ends, close to each other, of the two supporting rods are rotationally connected through a first shaft pin. The device can be suitable for paraffin removal and descaling of oil pipes with different diameters, and is high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pipe wax removal and descaling, in particular to a wax removal and descaling device for continuous oil pipes in oil and gas fields. Background Art

[0002] After the oil and gas wells are developed, they enter the production process. Since the produced oil-containing compounds contain a variety of substances, the pressure and temperature change continuously during the process of flowing from underground to the surface. Due to this change, the wax in the oil-containing compounds is continuously precipitated, and the precipitated wax adheres to the well wall. As the production time increases, the wax will become thicker and thicker. The wax adhered to the well wall will narrow the oil production channel and block the oil production channel at the bottom, causing a significant decrease in the production of oil and gas wells.

[0003] Among them, the announcement number CN206458414U discloses a wax removal and descaling device for coiled tubing in oil and gas fields, which uses coiled tubing for wax removal. The removed wax can be recycled back to the ground, and the wellbore will not be blocked by human intervention. A flushing hole is designed on the upper end of the flushing tool to clean the wax remaining at the mechanical scraping place. The wax removal and descaling tool is connected to the coiled tubing for wax removal and descaling. The front-end flushing tool of the pipe string will first perform 360° hydraulic cleaning of the wellbore. As the pipe string is lowered, the wax remover in the pipe string will then perform mechanical cleaning of the wellbore, realizing a dual cleaning method combining hydraulic flushing and mechanical scraping, greatly improving the cleaning effect, saving costs, and improving work efficiency. There are still defects in this technical solution:

[0004] In this technical solution, since the sizes of the straightening block and the wax scraper are fixed, they can only be used in conjunction with matching oil pipes. When wax and scale removal work is performed on oil pipes of different diameters, devices of different specifications need to be used, which is very inconvenient. Utility Model Content

[0005] In view of the problems existing in the existing wax and scale removal devices for coiled tubing in oil and gas fields, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a wax cleaning and descaling device for a coiled tubing in an oil and gas field, which solves the problem that in the prior art, the size of the straightening block and the wax scraper are fixed, so the coiled tubing can only be used in conjunction with a matching tubing. When wax cleaning and descaling are performed on tubings of different diameters, devices of different specifications need to be used, which is very inconvenient.

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

[0008] The cam is connected with the cleaning tube of the cleaning tube by the L-shaped tubes at two ends, and the two ends of the cleaning tube are connected with the cleaning tube by the L-shaped tubes at two ends.

[0009] Preferably, the elastic connection mechanism includes a fixed shell and a stopper, the two fixed shells are fixedly arranged on both sides of the rotating ring, the stopper is slidably arranged inside the fixed shell, a connecting rod is fixedly arranged on one side of the stopper, one end of the connecting rod extends to the outside of the fixed shell and is fixedly connected to the corresponding arc plate, and a spring is fixedly arranged on the side of the stopper away from the connecting rod, and the other end of the spring is fixedly connected to the inner wall of the fixed shell.

[0010] Preferably, the adjustment mechanism includes an internal threaded tube and a threaded rod, the internal threaded tube is rotatably arranged on an inner wall of one side of the slide groove, the threaded rod is threadedly sleeved inside the internal threaded tube, and one end of the threaded rod is fixedly connected to the corresponding slider.

[0011] Preferably, a rotating wheel is fixedly sleeved on the outer wall of the internally threaded tube.

[0012] Preferably, both sides of the sliding block are in contact with the inner wall of the sliding groove.

[0013] Preferably, the cross-sections of the fixed shell and the stopper are both rectangular.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. The utility model can rotate the internal threaded pipe to move the threaded rod that cannot rotate, so as to drive the slider to move, so as to rotate the two support rods toward verticality, and to adjust the distance between one end connected to the two support rods and the cleaning pipe, so as to facilitate the straightening and support of the connecting pipe in pipes of different diameters.

[0016] 2. The utility model can adjust the distance between the arc scraper and the cleaning pipe by pushing the stopper to move through the spring, so as to facilitate the contact with the inner wall of the pipes with different diameters and to facilitate the wax and scale removal of the inner wall of different pipes.

[0017] 3. The utility model sprays cleaning liquid through two L-shaped tubes, and under the reaction force, the rotating shell rotates, and the L-shaped rod drives the rotating ring to rotate, that is, the arc scraper rotates, which can completely clean the inner wall of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 This is a structural schematic diagram of a wax and scale removal device for a continuous oil pipe in an oil and gas field proposed by the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the local A part;

[0021] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B in the middle.

[0022] Description of reference numerals:

[0023] 1. Cleaning tube; 2. Rotating shell; 3. L-shaped tube; 4. Rotating ring; 5. L-shaped rod; 6. Support rod; 7. First shaft pin; 8. Second shaft pin; 9. Sliding block; 10. Internal threaded tube; 11. Threaded rod; 12. Fixed shell; 13. Block; 14. Spring; 15. Connecting rod; 16. Arc scraper. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] The utility model embodiment discloses a wax and scale removing device for a continuous oil pipe in an oil and gas field.

[0026] Reference Figure 1-3, a wax and scale removing device for continuous oil pipes in oil and gas fields comprises a cleaning pipe 1 and a rotating shell 2, the rotating shell 2 is rotatably arranged at one end of the cleaning pipe 1, the rotating shell 2 is connected to the cleaning pipe 1, L-shaped pipes 3 are fixedly arranged on both sides of the rotating shell 2, and the water outlets of the two L-shaped pipes 3 are in opposite directions. A rotating ring 4 is rotatably sleeved on the outer wall of one end of the cleaning pipe 1 close to the rotating shell 2, and one side of the rotating ring 4 is fixedly connected to the rotating shell 2 through an L-shaped rod. An arc scraper 16 is arranged on both sides of the rotating shell 2, and an elastic connecting mechanism is arranged between the arc scraper 16 and the rotating ring 4. A slide groove is provided on both sides of the cleaning pipe 1, and two support rods 6 are arranged on the inner side of the slide groove. The ends of the two support rods 6 close to each other are rotatably connected through a first shaft pin 7. A slider 9 is slidably arranged on one side of the inner side of the slide groove, and a groove is provided on one side of the slider 9. The ends of the two support rods 6 that are away from each other are fixedly sleeved with a second shaft pin 8, and the two ends of the second shaft pin 8 on both sides are rotatably connected with the inner wall of the corresponding slide groove and the inner wall of the groove respectively.

[0027] Reference Figure 1-3 The elastic connection mechanism includes a fixed shell 12 and a stopper 13. The two fixed shells 12 are fixedly arranged on both sides of the rotating ring 4. The stopper 13 is slidably arranged inside the fixed shell 12. A connecting rod 15 is fixedly arranged on one side of the stopper 13. One end of the connecting rod 15 extends to the outside of the fixed shell 12 and is fixedly connected to the corresponding arc plate. A spring 14 is fixedly arranged on the side of the stopper 13 away from the connecting rod 15. The other end of the spring 14 is fixedly connected to the inner wall of the fixed shell 12. The cross-sections of the fixed shell 12 and the stopper 13 are both rectangular, so that the stopper 13 cannot rotate, that is, it can slide stably.

[0028] Reference Figure 1-3 An adjusting mechanism for driving the slider 9 to move is provided on one side of the inner part of the slide groove, and the adjusting mechanism includes an internal threaded tube 10 and a threaded rod 11. The internal threaded tube 10 is rotatably provided on an inner wall of one side of the slide groove, and the threaded rod 11 is threadedly sleeved inside the internal threaded tube 10. One end of the threaded rod 11 is fixedly connected to the corresponding slider 9, and a rotating wheel is fixedly sleeved on the outer wall of the internal threaded tube 10 to facilitate the rotation of the internal threaded tube 10. Both sides of the slider 9 are in conflict with the inner wall of the slide groove, so that the slider 9 cannot rotate, that is, it can slide stably.

[0029] In the utility model, when in use, the internal threaded tube 10 is rotated to move the threaded rod 11 that cannot rotate, which can drive the slider 9 to move, that is, the two support rods 6 can be rotated toward verticality, that is, the distance between the end connected by the two support rods 6 and the cleaning tube 1 can be adjusted, which is convenient for straightening and supporting the connecting tube in pipes of different diameters. The spring 14 pushes the stopper 13 to move, that is, the distance between the arc scraper 16 and the cleaning tube 1 can be adjusted, that is, it is convenient to abut against the inner walls of pipes of different diameters, and it is convenient to clean wax and descale the inner walls of different pipes. The two L-shaped tubes 3 spray cleaning liquid, and under the reaction force, the rotating shell 2 is rotated, and the L-shaped rod 5 drives the rotating ring 4 to rotate, that is, the arc scraper 16 is rotated, and the inner wall of the pipe can be fully cleaned wax and descaled.

[0030] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A wax and scale removal device for coiled tubing in oil and gas fields, comprising a cleaning tube (1) and a rotating shell (2), characterized in that: The rotating shell (2) is rotatably arranged at one end of the cleaning tube (1), the rotating shell (2) and the cleaning tube (1) are connected, L-shaped tubes (3) are fixedly arranged on both sides of the rotating shell (2), and the water outlets of the two L-shaped tubes (3) are in opposite directions. A rotating ring (4) is rotatably sleeved on the outer wall of one end of the cleaning tube (1) close to the rotating shell (2), one side of the rotating ring (4) is fixedly connected to the rotating shell (2) via an L-shaped rod, and arc-shaped scrapers (16) are arranged on both sides of the rotating shell (2), and an elastic connecting mechanism is arranged between the arc-shaped scraper (16) and the rotating ring (4). The cleaning tube (1) is provided with a slide groove on both sides, and two support rods (6) are arranged inside the slide groove. The close ends of the two support rods (6) are rotatably connected by a first shaft pin (7). A slider (9) is slidably arranged on one side of the inner side of the slide groove. A groove is arranged on one side of the slider (9). The ends of the two support rods (6) that are away from each other are fixedly sleeved with a second shaft pin (8). The two ends of the second shaft pin (8) on both sides are rotatably connected with the inner wall of the corresponding slide groove and the inner wall of the groove respectively. An adjustment mechanism for driving the slider (9) to move is arranged on one side of the inner side of the slide groove.

2. The oil and gas field coiled tubing wax and scale removal device according to claim 1, characterized in that: The elastic connection mechanism comprises a fixed shell (12) and a stopper (13), wherein the two fixed shells (12) are fixedly arranged on both sides of the rotating ring (4), and the stopper (13) is slidably arranged inside the fixed shell (12). A connecting rod (15) is fixedly arranged on one side of the stopper (13), and one end of the connecting rod (15) extends to the outside of the fixed shell (12) and is fixedly connected to the corresponding arc plate. A spring (14) is fixedly arranged on the side of the stopper (13) away from the connecting rod (15), and the other end of the spring (14) is fixedly connected to the inner wall of the fixed shell (12).

3. The oil and gas field coiled tubing wax and scale removal device according to claim 1, characterized in that: The adjustment mechanism comprises an internal threaded tube (10) and a threaded rod (11); the internal threaded tube (10) is rotatably arranged on an inner wall of one side of the slide groove; the threaded rod (11) is threadably sleeved inside the internal threaded tube (10); and one end of the threaded rod (11) is fixedly connected to a corresponding slider (9).

4. The oil and gas field coiled tubing wax and scale removal device according to claim 3, characterized in that: A rotating wheel is fixedly sleeved on the outer wall of the internally threaded tube (10).

5. The oil and gas field coiled tubing wax and scale removal device according to claim 1, characterized in that: Both sides of the sliding block (9) are in contact with the inner wall of the sliding groove.

6. The oil and gas field coiled tubing wax and scale removal device according to claim 2, characterized in that: The cross sections of the fixed shell (12) and the stopper (13) are both rectangular.

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