Combined intelligent adjusting flexible light pole wellhead sealer

Abstract

The application relates to the technical field of polished rod sealing devices of sucker rod wells, in particular to a combined intelligent adjusting flexible polished rod wellhead sealing device, which comprises an air charging sealing device clamped on a flexible polished rod; the air charging sealing device comprises an air charging and discharging pump, a hard outer wall and an annular air bag; the annular air bag is arranged between the hard outer wall and the flexible polished rod; the air charging and discharging pump is arranged outside the hard outer wall and is used for controlling air charging and discharging of the annular air bag, so that the annular air bag tightly holds or releases the flexible polished rod. The air charging and discharging of the annular air bag is controlled by the air charging and discharging pump, the tightly holding and releasing of the annular air bag to the flexible polished rod can be flexibly realized, the state can be adjusted according to actual working conditions, and the convenience and adaptability of sealing and clamping operations are improved.

Description

Technical Field

[0001] This application relates to the technical field of rod-type oil wellhead polished rod sealing devices, and in particular to a combined intelligent adjustable flexible polished rod wellhead sealer. Background Technology

[0002] The main function of rod-type wellhead sealing devices is to seal the wellhead and polished rod to prevent well fluid leakage, which could cause environmental pollution and pose significant safety risks.

[0003] In addition to effectively reducing the diameter, tightly wrapping the smooth rod, and providing a seal, the sealing packing should also be easy to remove and replace, reducing the difficulty of on-site operation.

[0004] Flexible smooth rods mainly consist of a reinforcing layer and a cladding layer. The reinforcing layer, to ensure long-term bending and tensile fatigue performance, often employs a rope structure. The cladding layer is used to achieve a smooth surface. To ensure elongation, the hardness, surface friction coefficient, and wear resistance of the cladding layer are inferior to those of steel smooth rods. Excessive compression force from the packing on the flexible smooth rod shortens the service life of both the smooth rod and the packing; insufficient pressure easily leads to leakage. Therefore, effectively sealing the wellhead while appropriately tightening the flexible smooth rod is particularly important.

[0005] In summary, for wellheads using flexible polished rods, the polished rod sealing device needs to address the sealing issue, further control the clamping force of the sealing device on the flexible polished rod, and ensure adequate lubrication. Utility Model Content

[0006] The purpose of this application is to provide a combined intelligent adjustable flexible polished rod wellhead seal to solve at least one of the technical problems existing in the prior art.

[0007] To solve the above-mentioned technical problems, this application provides a combined intelligent adjustable flexible polished rod wellhead sealer, including an air-filled sealing device clamped on the flexible polished rod; The inflatable sealing device includes an inflation / deflation pump, a rigid outer wall, and an annular airbag; The annular airbag is disposed between the rigid outer wall and the flexible optical rod; The inflation / deflation pump is located on the outside of the rigid outer wall and is used to control the inflation and deflation of the annular airbag, thereby causing the annular airbag to tighten or loosen the flexible optical rod.

[0008] Furthermore, it also includes a grease filling port; The grease filling port is used to inject grease into the seal, and the grease is used to lubricate between the annular airbag and the flexible rod.

[0009] Furthermore, a pressure sensor is also provided inside the annular airbag to measure the gas pressure inside the annular airbag in real time.

[0010] Furthermore, two annular airbags are provided along the axial direction of the flexible rod, namely a first airbag away from the wellhead and a second airbag close to the wellhead; The grease filling port is located between the two annular airbags.

[0011] Furthermore, the annular airbag is made of vulcanized polyurethane.

[0012] Furthermore, it also includes clamps and a blowout preventer; The clamp tightens the wellhead from top to bottom; The lower end of the blowout preventer is connected to the clamp. The blowout preventer is normally closed when not in operation and opens during oil extraction.

[0013] Furthermore, it also includes sealing rings; The sealing ring is located at the component connection of the sealer to prevent grease from leaking out.

[0014] Furthermore, the air pressure inside the second airbag is not lower than the air pressure inside the first airbag.

[0015] Furthermore, the air pressure inside the first airbag is maintained within the range of 0.3-0.4 MPa; The air pressure inside the second airbag is maintained within the range of 0.4-0.5 MPa.

[0016] Furthermore, it also includes power supply equipment; The power supply device includes a built-in battery and a photovoltaic panel electrically connected to the built-in battery; The photovoltaic panel is used to generate photovoltaic power during sunshine and transmit power to the built-in battery; The built-in battery is used to store the electrical energy output by the photovoltaic panel and to power the charge / discharge pump and the pressure sensor.

[0017] By adopting the above technical solution, this application has the following beneficial effects: (1) By controlling the inflation and deflation of the annular airbag through the inflation and deflation pump, the annular airbag can be flexibly tightened and loosened on the flexible rod, which is convenient to adjust the state according to the actual working conditions and improves the convenience and adaptability of sealing and clamping operations.

[0018] Excellent lubrication: A grease filling port is provided to inject grease into the seal, which effectively reduces friction between the annular airbag and the flexible rod, reduces wear, and extends the service life of the equipment.

[0019] (2) A pressure sensor is installed inside the annular airbag to measure the gas pressure in real time, so that staff can keep track of the sealing status in a timely manner and ensure that the sealing effect is stable and reliable.

[0020] (3) Two annular airbags are set along the axis of the flexible smooth rod to form a double sealing structure, which enhances the sealing performance of the wellhead and effectively prevents leakage of the medium inside the well.

[0021] (4) The annular airbag is made of vulcanized polyurethane. This material has good elasticity and wear resistance, and can better adapt to the working environment of the flexible rod, thereby improving the reliability and durability of the seal.

[0022] (5) Equipped with clamps and blowout preventers. The clamps tighten the wellhead, and the blowout preventer is normally closed when not in operation and opened when producing oil, effectively preventing blowout accidents. At the same time, a sealing ring is set to prevent grease from overflowing and ensure the normal operation of the equipment.

[0023] (6) By reasonably setting the air pressure range of the first airbag and the second airbag, and ensuring that the air pressure of the second airbag is not lower than that of the first airbag, the sealing effect is further optimized, ensuring that a good seal can be achieved under different working conditions.

[0024] (7) The power supply device adopts a combination of built-in battery and photovoltaic panel. The photovoltaic panel generates electricity during sunshine and transmits it to the built-in battery. The built-in battery stores electrical energy and supplies power to the charging and discharging pump and pressure sensor, realizing green and energy-saving power supply and ensuring the continuous and stable operation of the equipment. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of a combined intelligent adjustable flexible polished rod wellhead seal disclosed in this application; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 A magnified view of a section at point B.

[0027] Figure label: 1-Air pump; 2-Hard outer wall; 3-Annular airbag; 4-Flexible polished rod; 5-Grease filling port; 6-First airbag; 7-Second airbag; 8-Wellhead; 9-Clamp; 10-Blowout preventer box; 11-Sealing ring. Detailed Implementation

[0028] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] It should also be noted that the specific embodiments or implementation methods described below are a series of optimized settings listed in this application to further explain the specific application content, and these settings can be combined or used in conjunction with each other.

[0032] The present application will be further explained below with reference to specific implementation methods.

[0033] like Figure 1-3 As shown, this embodiment provides a combined intelligent adjustable flexible polished rod wellhead 8 sealer, including an air-filled sealing device clamped on the flexible polished rod 4; The inflatable sealing device includes an inflation / deflation pump 1, a rigid outer wall 2, and an annular airbag 3; The annular airbag 3 is disposed between the rigid outer wall 2 and the flexible light rod 4; The inflation / deflation pump 1 is located on the outside of the rigid outer wall 2 and is used to control the inflation and deflation of the annular airbag 3, thereby causing the annular airbag 3 to tighten or loosen the flexible light rod 4.

[0034] The seal disclosed in this application is used to prevent leakage at the connection between the wellhead 8 and the flexible polished rod 4. Therefore, an air-filled sealing device is provided to clamp and seal the flexible polished rod 4.

[0035] like Figure 1 , 3 As shown, as a further embodiment of this example, a grease filling port 5 is also included; The grease filling port 5 is used to inject grease into the sealer, and the grease is used to lubricate between the annular airbag 3 and the flexible light rod 4.

[0036] During oil extraction, the annular gasbag 3 clamps the flexible polished rod 4, generating friction between them. Excessive friction reduces the service life of both the annular gasbag 3 and the flexible polished rod 4, and significant frictional vibration can also affect the oil extraction process. Therefore, the seal in this application includes a grease inlet 5. The grease effectively reduces the friction between the annular gasbag 3 and the flexible polished rod 4, ensuring the seal's long-term safe operation. Engineering practice shows that after grease inlet, the coefficient of friction between the annular gasbag 3 and the flexible polished rod 4 can be reduced to below 0.2.

[0037] As a further embodiment of this invention, a pressure sensor (not shown in the figure) is also provided inside the annular airbag 3 to measure the gas pressure inside the annular airbag 3 in real time.

[0038] like Figure 1 As shown, as a further embodiment of this example, two annular airbags 3 are provided along the axial direction of the flexible rod 4, namely a first airbag 6 away from the wellhead 8 and a second airbag 7 close to the wellhead 8. The grease filling port 5 is located between the two annular airbags 3.

[0039] As a further embodiment of this example, the air pressure value inside the second airbag 7 is not lower than the air pressure value inside the first airbag 6.

[0040] As a further embodiment of this example, the air pressure inside the first airbag 6 is maintained within the range of 0.3-0.4 MPa; The air pressure inside the second airbag 7 is maintained within the range of 0.4-0.5 MPa.

[0041] like Figure 1As shown, in this application, the flexible guide rod 4 is clamped after the annular airbag 3 is inflated. However, during clamping, excessive inflation can lead to excessive friction between the annular airbag 3 and the flexible guide rod 4, while insufficient inflation can result in insufficient pressure and leakage. Preferably, the air pressure in the first airbag 6 is maintained within the range of 0.3-0.4 MPa, and the air pressure in the second airbag 7 is maintained within the range of 0.4-0.5 MPa. This is measured in real time by a pressure sensor. When the pressure is detected to be higher or lower than this preferred range, negative feedback adjustment is performed by controlling the inflation / deflation pump 1. This preferred air pressure range allows the second airbag 7, closer to the wellhead 8, to achieve a high-pressure seal, preventing the produced fluid from seeping out, while the first airbag 6, farther from the wellhead 8, provides a low-pressure seal, preventing grease leakage while achieving a two-stage seal.

[0042] As a further embodiment of this example, the annular airbag 3 is made of vulcanized polyurethane.

[0043] like Figure 1-2 As shown, as a further embodiment of this invention, it also includes a clamp 9 and a blowout preventer 10; The clamp 9 tightens the wellhead 8 from top to bottom; The lower end of the blowout preventer 10 is connected to the clamp 9; The blowout preventer 10 is normally closed when not in operation, but opens during oil extraction.

[0044] like Figure 1-3 As shown, as a further embodiment of this invention, a sealing ring 11 is also included; The sealing ring 11 is provided at the component connection of the sealer to prevent grease from overflowing.

[0045] As a further embodiment of this invention, a power supply device (not shown in the figure) is also included. The power supply device includes a built-in battery and a photovoltaic panel electrically connected to the built-in battery; The photovoltaic panel is used to generate photovoltaic power during sunshine and transmit power to the built-in battery; The built-in battery is used to store the electrical energy output by the photovoltaic panel and to power the charge / discharge pump 1 and the pressure sensor.

[0046] The power supply device described in this application powers the inflation / deflation pump 1 and the pressure sensor. The pressure sensor monitors the air pressure inside the annular airbag 3 in real time. When the air pressure in the annular airbag exceeds or falls below a preset value, it can automatically control or remind the operator to manually control the inflation / deflation pump 1 to adjust the air pressure inside the annular airbag 3. In order to enable the combined intelligent adjustable flexible polished rod wellhead 8 seal disclosed in this application to perform fully automatic intelligent adjustment, this application also adds a processor and uses a negative feedback mechanism to control the operation of the inflation / deflation pump, thereby keeping the air pressure inside the annular airbag 3 always within the preset range.

[0047] By adopting the above technical solution, this application has the following beneficial effects: (1) By controlling the inflation and deflation of the annular airbag 3 through the inflation and deflation pump 1, the flexible polished rod 4 can be flexibly tightened or loosened, effectively preventing leakage at the connection between the wellhead 8 and the flexible polished rod 4, and ensuring the safety of oil production operations.

[0048] (2) A grease filling port 5 is provided. The injected grease can reduce the friction between the annular airbag 3 and the flexible polished rod 4, reduce the wear of both, extend the service life, reduce the impact of friction vibration on the oil production process, and reduce the friction coefficient to below 0.2 after adding grease.

[0049] (3) A pressure sensor is installed inside the annular airbag 3 to measure the gas pressure in real time; the two annular airbags 3 are set with different pressure ranges. The second airbag 7 is high-pressure sealed to prevent the produced fluid from seeping out, and the first airbag 6 is low-pressure sealed to prevent the lubricating grease from flowing out. The pressure is kept stable through negative feedback adjustment to ensure the sealing effect.

[0050] (4) The annular airbag 3 is made of vulcanized polyurethane, which has good performance and can adapt to the oil production environment.

[0051] (5) The clamp 9 and blowout preventer 10 are installed. The clamp 9 tightens the wellhead 8, and the blowout preventer 10 is normally closed when not in operation and opened when producing oil to enhance the blowout prevention capability; the sealing ring 11 prevents grease from overflowing and ensures the normal operation of the sealer.

[0052] (6) The power supply device includes a built-in battery and a photovoltaic panel. The photovoltaic panel generates electricity during sunshine and transmits it to the built-in battery. The built-in battery supplies power to the charging and discharging pump 1 and the pressure sensor, ensuring stable operation of the equipment while using solar energy for energy saving and environmental protection.

[0053] (7) Add a processor and use a negative feedback mechanism to control the operation of the inflation and deflation pump 1 so that the air pressure inside the annular airbag 3 is always kept within the preset range, realize fully automatic intelligent adjustment, and improve work efficiency and reliability.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A combined intelligent adjustable flexible polished rod wellhead sealer, characterized in that, Includes an inflatable sealing device clamped on the flexible optical rod; The inflatable sealing device includes an inflation / deflation pump, a rigid outer wall, and an annular airbag; The annular airbag is disposed between the rigid outer wall and the flexible optical rod; The inflation / deflation pump is located on the outside of the rigid outer wall and is used to control the inflation and deflation of the annular airbag, thereby causing the annular airbag to tighten or loosen the flexible optical rod.

2. The combined intelligent adjustable flexible polished rod wellhead sealer according to claim 1, characterized in that, It also includes a grease filler port; The grease filling port is used to inject grease into the seal, and the grease is used to lubricate between the annular airbag and the flexible rod.

3. The combined intelligent adjustable flexible polished rod wellhead sealer according to claim 2, characterized in that, Two annular airbags are provided along the axial direction of the flexible rod, namely a first airbag away from the wellhead and a second airbag close to the wellhead; The grease filling port is located between the two annular airbags.

4. The combined intelligent adjustable flexible polished rod wellhead sealer according to claim 1, characterized in that, The annular airbag is also equipped with a pressure sensor for measuring the gas pressure inside the annular airbag in real time.

5. The combined intelligent adjustable flexible polished rod wellhead sealer according to claim 1, characterized in that, The annular airbag is made of vulcanized polyurethane.

6. The combined intelligent adjustable flexible polished rod wellhead sealer according to claim 1, characterized in that, It also includes clamps and a blowout preventer; The clamp tightens the wellhead from top to bottom; The lower end of the blowout preventer is connected to the clamp. The blowout preventer is normally closed when not in operation and opens during oil extraction.

7. The combined intelligent adjustable flexible polished rod wellhead sealer according to claim 2, characterized in that, It also includes sealing rings; The sealing ring is located at the component connection of the sealer to prevent grease from leaking out.

8. The combined intelligent adjustable flexible polished rod wellhead sealer according to claim 3, characterized in that, The air pressure inside the second airbag is not lower than the air pressure inside the first airbag.

9. The combined intelligent adjustable flexible polished rod wellhead sealer according to claim 8, characterized in that, The air pressure inside the first airbag is maintained within the range of 0.3-0.4 MPa; The air pressure inside the second airbag is maintained within the range of 0.4-0.5 MPa.

10. The combined intelligent adjustable flexible polished rod wellhead sealer according to claim 4, characterized in that, It also includes power supply equipment; The power supply device includes a built-in battery and a photovoltaic panel electrically connected to the built-in battery; The photovoltaic panel is used to generate photovoltaic power during sunshine and transmit power to the built-in battery; The built-in battery is used to store the electrical energy output by the photovoltaic panel and to power the charge / discharge pump and the pressure sensor.

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