Well testing and dredging mechanism for condensate gas well

Abstract

The invention discloses a condensate gas well test dredging mechanism which comprises a connecting piece which is of a solid structure and is used for increasing down force; the heating piece is arranged in the connecting piece and used for enabling the outer wall of the connecting piece to generate heat and melting blockages in the oil pipe; the clearing device is arranged at the end part of the connecting piece; the control device is electrically connected with the heating piece and the clearing device; when the connecting piece drives the removing device to descend into the oil pipe, the removing device is used for removing blockages in the oil pipe. When the dredging mechanism is used for well testing operation, the releasing pressure is increased through the mass and the strength of the connecting piece of the solid structure, and meanwhile blockages such as wax, colloid and asphaltene attached to the inner wall of an oil pipe can be effectively removed through the removing device; therefore, the dredging operation speed is increased, accurate analysis of a gas reservoir and a single well is facilitated, meanwhile, damage to a reservoir caused by well killing is avoided, and the problem that the yield of the single well is reduced is solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of condensate gas well testing and unblocking, and particularly relates to a condensate gas well testing and unblocking mechanism. BACKGROUND

[0002] The fluid components of the condensate gas reservoir in the Bozi and Daobei blocks of the Tarim oilfield are complex, wherein the condensate oil contains a high content of wax (about 10%), and also contains a small amount of gum and asphaltene. When the condensate gas is mined from the ground, with the decrease of pressure and temperature, the condensate gas will undergo the phenomenon of reverse condensation to precipitate condensate oil, and also precipitate the wax, gum and asphaltene contained therein. These wax, gum and asphaltene will continuously deposit and adhere to the inner wall of the oil pipe, causing the problem of plugging of the inner wall of the wellbore pipe, which causes the subsequent downhole operation of the gas well to be unable to obtain comprehensive pressure and temperature data of the gas reservoir and single well, and is not conducive to accurate analysis of the gas reservoir and single well. SUMMARY

[0003] The present application provides a condensate gas well testing and unblocking mechanism, which is used to solve the technical defects that the existing condensate gas undergoes the phenomenon of reverse condensation to precipitate condensate oil, wax, gum and asphaltene, which plugs the inner wall of the oil pipe, causes the subsequent downhole operation of the gas well to be unable to obtain comprehensive pressure and temperature data of the gas reservoir and single well, and is not conducive to accurate analysis of the gas reservoir and single well.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] A condensate gas well testing and unblocking mechanism, comprising:

[0006] The connecting piece is a solid structure and is used to increase the downward pressure;

[0007] The heating piece is built-in in the connecting piece to generate heat on the outer wall of the connecting piece, and is used to melt the blockage in the oil pipe;

[0008] The cleaning device is arranged at the end of the connecting piece;

[0009] The control device is electrically connected with the heating piece;

[0010] When the connecting piece drives the cleaning device to descend to the inside of the oil pipe, the cleaning device is used to clean the blockage in the oil pipe.

[0011] Further, the connecting piece is a tubular structure, and the heating piece is arranged in the connecting piece in a vertical or spiral shape.

[0012] Further, the heating piece is a heating cable.

[0013] Further, the cleaning device comprises a rotating assembly, the rotating assembly comprises a base, the base is arranged at the end of the connecting piece, and a motor and an outer cover are arranged at the top of the base;

[0014] The driving piece is located in the outer cover, the driving end of the driving piece extends to the outside of the outer cover and is provided with a tip, and the motor is used for driving the tip to rotate to clean the clogging material melted in the oil pipe.

[0015] Further, the cleaning device further comprises an adjusting assembly, the adjusting assembly comprises a mounting frame and mounting holes, the mounting frame is arranged at the back of the tip, the mounting holes are arranged on the mounting frame, and a plurality of mounting holes are arranged equidistantly from inside to outside, and the driving end of the motor is connected with one of the mounting holes;

[0016] The adjusting assembly is used for adjusting the working position of the rotating assembly during rotation, so that the eccentric rotation of the rotating assembly is realized.

[0017] Further, a vibrating assembly is further arranged, the vibrating assembly comprises a sleeve ring and a spring, the sleeve ring is arranged on the driving end of the motor, and the spring is arranged on the sleeve ring.

[0018] Further, the outer cover is provided with a fastener, the fastener is axially perpendicular to the outer cover, and the end of the fastener is connected with the outer side of the connecting piece.

[0019] Further, the fastener is a screw.

[0020] Further, the tip is a conical structure, and the surface of the tip is provided with a slanting convex rib.

[0021] Further, the mounting frame is a U-shaped structure, the open end of the mounting frame is connected with the back of the tip, and the mounting holes are arranged on the blocking end of the mounting frame.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1. During well testing, the connecting piece with the solid structure can increase the pressure during lowering, the cleaning device can effectively clean the clogging material such as wax, colloid and asphaltene attached to the inner wall of the oil pipe, the heating piece arranged in the connecting piece can melt the clogging material such as wax, colloid and asphaltene, so that the rate of unblocking operation is accelerated, after the inner wall of the well pipe is unblocked, the wireline pressure gauge well testing is carried out, the flow temperature and pressure gradient and the static temperature and pressure gradient when the whole well pipe is in gas phase can be measured, and the pressure and temperature data of the gas reservoir and the single well are obtained, which is beneficial to accurately analyze the gas reservoir and the single well, avoids the damage of well killing to the reservoir, and avoids the problem of single well yield reduction.

[0024] 2. The connector is a tubular structure. During specific operations, the heating element can be installed vertically or spirally in the connector according to the working conditions to achieve different unblocking effects.

[0025] 3. Using heating cables to heat the connectors can ensure uniform heating of the outer wall of the connectors and improve the service life of the entire unblocking mechanism.

[0026] 4. Coiled tubing equipment features pressurized operation and continuous start-up and shutdown, which can significantly improve operational efficiency.

[0027] 5. The rotating component effectively removes blockages from oil pipes through rotation, avoiding the inefficiencies or incomplete removal often associated with traditional methods. The adjustable component allows for eccentric rotation, increasing the contact area between the component and the blockage and generating a stronger cleaning force for more effective removal. The vibration component, generated during rotation, loosens and dislodges blockages adhering to the inner wall of the oil pipe, making them easier to remove. This combination of rotation and vibration gently removes blockages, reducing damage to the oil pipes and equipment. It also reduces wear and tear, lowers the failure rate, and extends the equipment's lifespan.

[0028] 6. The rotating assembly, supported by a base, integrates the drive unit, outer casing, adjustment components, and vibration components into a compact and fully functional structural unit. This not only reduces the overall size of the equipment but also improves its integration, making operation and maintenance more convenient.

[0029] 7. The mounting holes allow the adjustment component to be connected to the end via different connection methods and positions. Because the mounting holes are equidistant, appropriate mounting hole positions can be selected according to actual needs, enabling precise adjustment and positioning of the rotating component.

[0030] 8. When the drive component rotates, the collar will rotate accordingly. Due to the presence of the spring, the collar will be subjected to the elastic force of the spring during rotation, thereby generating periodic vibrations, which can effectively help clear blockages in the oil pipe, especially stubborn blockages attached to the pipe wall.

[0031] 9. The tapered structure allows the tip to generate greater cutting and impact forces during rotation, helping to thoroughly remove blockages from the pipe wall. Simultaneously, the oblique ridges increase the contact area and friction between the tip and the blockage, making the removal process more thorough and effective.

[0032] 10. When the drive unit uses an electric motor, it can provide efficient power output, adjustable speed and direction, and easy control and automation. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the condensate gas well testing and unblocking mechanism provided by the present invention;

[0035] The components are: 1. Connector; 2. Heating element; 3. Fastener; 4. Rotating assembly; 41. Base; 42. Motor; 43. Outer cover; 44. End; 5. Adjustment assembly; 51. Mounting bracket; 52. Mounting hole; 6. Angled protrusion; 7. Vibration assembly; 71. Collar; 72. Spring. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0042] The condensate gas reservoirs in the Bozi and Dabei blocks of the Tarim Oilfield have complex fluid compositions. The condensate oil contains high levels of wax (around 10%), as well as small amounts of gum and asphaltene. When condensate gas is extracted from underground, as the pressure and temperature decrease, reverse condensation occurs, releasing condensate oil and the wax, gum, and asphaltene it contains. These waxes, gums, and asphaltene continuously deposit and adhere to the inner wall of the tubing, causing blockages in the wellbore and tubing. This prevents subsequent downhole operations from obtaining comprehensive pressure and temperature data for the gas reservoir and individual wells, hindering accurate analysis of the gas reservoir and individual wells.

[0043] In order to overcome the above-mentioned technical defects, the inventors have provided a well testing and unblocking mechanism for condensate gas wells.

[0044] The present invention will now be described in further detail with reference to the accompanying drawings:

[0045] Example 1:

[0046] This invention provides a well-testing and unclogging mechanism for condensate gas wells, comprising: a connector 1, which is a solid structure used to increase downpressure; a heating element 2 built into the connector 1 to generate heat on the outer wall of the connector 1; a cleaning device disposed at the end of the connector 1, which, driven by the connector 1, enters the tubing to remove wax, glue, and asphalt blockages from the inner wall of the tubing; and a control device electrically connected to the heating element 2 and the cleaning device, used to control the opening and closing of the heating element 2 and the cleaning device; wherein, as shown... Figure 1As shown, during the process of lowering connector 1 into the tubing inside the well using external equipment, connector 1 drives the cleaning device to descend into the tubing. The cleaning device removes the blockages inside the tubing. Furthermore, since connector 1 has a built-in heating element 2, it can heat and melt blockages such as wax, gum, and asphalt, thereby accelerating the unblocking operation. After unblocking the inner wall of the tubing, a steel wire pressure gauge test is performed to measure the flow temperature and pressure gradient and static temperature and pressure gradient when the entire wellbore is in the gas phase. This allows for the acquisition of comprehensive pressure and temperature data for the gas reservoir and individual wells, which is beneficial for accurate analysis of the gas reservoir and individual wells. At the same time, it avoids damage to the reservoir caused by well killing and prevents the problem of reduced production of individual wells.

[0047] In this embodiment, the connector 1 is a tubular structure, preferably a continuous tubing, and a long tubing can also be used. The length of the continuous tubing is two kilometers. Since blockages such as wax, gum, and asphalt generally appear within a depth range of two kilometers in the wellbore, by using a two-kilometer-long continuous tubing to drive the cleaning device for unblocking operations, blockages such as wax, gum, and asphalt can be completely and accurately removed.

[0048] In this embodiment, the heating element 2 is preferably a heating cable, but other heating components, such as heating wire, can also be used, but this embodiment is not limited to this. When the heating cable is selected as the heating element 2, the size of the heating element 2 can be increased and arranged vertically in the middle of the connector 1 to heat the outer wall of the connector 1.

[0049] In this embodiment, the cleaning device includes a rotating assembly 4, an adjusting assembly 5, and a vibration assembly 7, both of which are mounted on the rotating assembly 4. During the unclogging of the oil pipe's inner wall, the rotating assembly 4, driven by the connecting piece 1, rotates to remove blockages, avoiding the inefficiencies or incomplete cleaning issues that can occur with traditional methods using steel wire. The adjusting assembly 5 adjusts the working position of the rotating assembly 4 during its rotation, enabling eccentric rotation for cleaning. This eccentric rotation increases the contact area between the rotating assembly 4 and the blockage, generating a stronger cleaning force for more effective removal. Finally, the vibration assembly 7 generates physical vibrations during the rotation of the rotating assembly 4, loosening and dislodging blockages adhering to the inner wall of the oil pipe, making them easier for the rotating assembly 4 to remove. Through the combined action of rotation and vibration, this cleaning device can remove blockages more gently, reducing damage to the oil pipe and the equipment itself. It also reduces equipment wear and failure rates, extending the equipment's service life.

[0050] In this embodiment, the rotating component 4 includes a base 41, a motor 42 and an outer cover 43 on the top of the base 41, the motor 42 is located inside the outer cover 43, and a fastener 3 is provided on the outer cover 43. The fastener 3 is axially perpendicular to the outer cover 43, and the end of the fastener 3 is connected to the outside of the connector 1. The fastener 3 is preferably a screw. The setting of the screw further ensures the firmness of the installation between the outer cover 43 and the connector 1. The driving end of the motor 42 extends to the outside of the outer cover 43 and is fixedly connected to the end 44 through the end connector. The adjusting component 5 and the vibration component 7 are disposed between the driving end of the motor 42 and the end 44. During the unblocking operation, the end cap 44 is preferably a tapered end cap with an outer diameter smaller than the inner diameter of the tubing inside the wellbore, allowing it to smoothly enter the tubing. Furthermore, the surface of the end cap 44 is provided with oblique convex ridges 6, which increase the contact area and friction between the end cap 44 and the blockage, making the removal process more thorough and effective. Secondly, the oblique convex ridges 6 not only enhance the removal effect but also prevent secondary blockage to a certain extent. When the end cap 44 removes the blockage, the oblique convex ridges 6 can completely break up the blockage and push it out of the pipe, reducing the possibility of blockage residue. Moreover, the tapered structure and oblique convex ridges 6 design give the end cap 44 better wear resistance and impact resistance during the removal process, which helps extend its service life and reduce replacement frequency and maintenance costs. In addition, the outer cover 43 is fastened to the side wall of the base 41 with fasteners 3, further enhancing the reliability of the connection and preventing the outer cover 43 from falling off the base 41 during long-term use, which could damage the motor 42 and affect the efficiency of the dredging operation. Secondly, the design of the outer cover 43 can effectively protect the motor 42 from the influence of the external environment, such as dust and moisture. At the same time, the outer cover 43 can also reduce the noise and vibration generated by the motor 42 during operation, improving the stability and service life of the equipment.

[0051] The rotating component 4 is supported by the base 41 and integrates the motor 42, the outer cover 43, the adjustment component 5 and the vibration component 7 together to form a compact and fully functional structural unit. This not only reduces the overall size of the equipment but also improves the integration of the equipment, making operation and maintenance more convenient.

[0052] In this embodiment, the motor 42 provides efficient power output, adjustable speed and direction, and is easy to control and automate. In this embodiment, the adjustment component 5 includes a mounting bracket 51 and mounting holes 52. The mounting bracket 51 has a U-shaped structure, with its open end connected to the back of the end head 44. The top of its sealing end is provided with mounting holes 52, which are equidistant from the inside out. By connecting the drive end of the motor 42 to mounting holes 52 at different positions, the end head 44 can rotate axially with different eccentric distances, further expanding the effective area of ​​the end head 44 and improving the blockage removal effect. It is also applicable to wellbores of different diameters, eliminating the need for pre-installed end heads of multiple sizes, thus saving costs. Furthermore, the appropriate mounting hole 52 position can be selected according to actual needs to achieve precise adjustment and positioning of the rotating component 4.

[0053] In this embodiment, the vibration assembly 7 includes a collar 71 and a spring 72. The collar 71 is disposed on the drive end of the motor 42, and the spring 72 is disposed on the collar 71. Specifically, the collar 71 is disposed on the drive shaft of the motor 42, and the spring 72 is disposed between the collar 71 and the mounting bracket 51. The spring 72 provides a downward elastic force to the mounting bracket 51, enabling up-and-down vibration during the downward pressing of the end 44, preventing blockages from adhering to the end 44, thereby avoiding affecting the continuous clearing effect of the end 44 on blockages. When the motor 42 rotates, the collar 71 rotates accordingly. Due to the presence of the spring 72, the collar 71 is subjected to the elastic force of the spring 72 during rotation, thereby generating periodic vibration. This vibration can effectively help clear blockages in the oil pipe, especially stubborn blockages attached to the pipe wall.

[0054] In this embodiment, the outer cover 43 is a columnar structure.

[0055] In this embodiment, the heating element 2 includes a cable core, insulating material, filling material, and a steel pipe sheath. The steel pipe sheath is located on the outermost side and is used to protect the entire heating element 2. The filling material is located between the insulating material and the steel pipe sheath, and the cable core is located inside the insulating material.

[0056] Example 2:

[0057] The difference from Embodiment 1 is that in this embodiment, the heating element 2 is spirally coiled inside the edge of the connector 1 with a smaller size, so that the outer wall of the connector 1 is heated more evenly and the unblocking effect is better.

[0058] In summary, during well testing, this unblocking mechanism increases the lowering pressure through the mass and strength of the connector 1 itself, while the cleaning device effectively removes blockages such as wax, gum, and asphalt adhering to the inner wall of the tubing. Furthermore, since the connector 1 has a built-in heating element 2, the blockages such as wax, gum, and asphalt can be melted by heating, thereby accelerating the unblocking operation. After unblocking the inner wall of the well tubing, a steel wire pressure gauge test is then conducted to measure the flow temperature and pressure gradient and static temperature and pressure gradient when the entire wellbore is in the gas phase. This allows for the acquisition of comprehensive pressure and temperature data for the gas reservoir and individual wells, which is beneficial for accurate analysis of the gas reservoir and individual wells. At the same time, it avoids damage to the reservoir caused by well killing and prevents a decrease in single-well production.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading the present invention, they can still make various changes, modifications or equivalent substitutions to the specific implementation of the invention, but these changes, modifications or equivalent substitutions are all within the scope of protection of the pending claims of the invention.

Claims

1. A condensate well test clean-out mechanism, comprising: The utility model relates to a downhole cleaning device, which comprises the following components: a connecting piece (1) in a solid structure for increasing the down pressure; a heating piece (2) built in the connecting piece (1) to generate heat on the outer wall of the connecting piece (1) for melting the blockage in the oil pipe; a cleaning device arranged at the end of the connecting piece (1); a control device electrically connected with the heating piece (2); wherein, when the connecting piece (1) drives the cleaning device to descend to the inside of the oil pipe, the cleaning device is used for removing the blockage in the oil pipe.

2. The mechanism of claim 1, wherein, The connecting piece (1) is in a tubular structure, and the heating piece (2) is arranged in the connecting piece (1) in a vertical or spiral shape.

3. The mechanism according to claim 1 or 2, characterized in that The heating piece (2) is a heating cable.

4. The mechanism of claim 1, wherein, The cleaning device comprises a rotating assembly (4), which comprises a base (41) arranged at the end of the connecting piece (1), and a motor (42) and an outer cover (43) arranged on the top of the base (41). The driving piece (42) is located in the outer cover (43), and the driving end thereof extends to the outside of the outer cover (43) and is provided with a tip (44), and the motor (42) is used for driving the tip (44) to rotate and remove the melted blockage in the oil pipe.

5. The mechanism of claim 4, wherein, The cleaning device further comprises an adjusting assembly (5), which comprises a mounting rack (51) and mounting holes (52), the mounting rack (51) is arranged at the back of the tip (44), the mounting holes (52) are arranged on the mounting rack (51), and a plurality of mounting holes (52) are equidistantly arranged from the inside to the outside, and the driving end of the motor (42) is connected with one of the mounting holes (52). The adjusting assembly (5) is used for adjusting the working position of the rotating assembly (4) during rotation to realize the eccentric rotation of the rotating assembly (4).

6. The mechanism of claim 4, wherein, The utility model further comprises a vibrating assembly (7), which comprises a sleeve ring (71) and a spring (72), the sleeve ring (71) is arranged on the driving end of the motor (42), and the spring (72) is arranged on the sleeve ring (71).

7. The mechanism of claim 4, wherein, The outer cover (43) is provided with a fastener (3), the fastener (3) is axially perpendicular to the outer cover (43), and the end of the fastener (3) is connected with the outside of the connecting piece (1).

8. The mechanism of claim 7, wherein, The fastener (3) is a screw.

9. The mechanism of claim 5, wherein, The tip (44) is in a conical structure, and the surface of the tip (44) is provided with a slanting convex rib (6).

10. The mechanism of claim 5, wherein, The mounting rack (51) is in a U-shaped structure, the open end of which is connected with the back of the tip (44), and the mounting holes (52) are arranged on the blocking end of the mounting rack (51).

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