Stable type oil pumping unit polish rod sealer

Abstract

The invention discloses a stable type oil pumping unit polish rod sealer, and aims to solve the problems that an existing polish rod sealer is unstable in sealing effect, the sealing strength cannot be flexibly adjusted, and the heat dissipation performance is poor. The sealer comprises a sealer shell, a sealing assembly and a sealing strength adjusting assembly; the sealer shell is composed of an upper sealing cover and a lower sealing cover which are slidably connected in a sleeved mode. The sealing assembly comprises upper and lower elastomer sealing rings which are respectively fixed in the inner cavities of the upper and lower sealing covers, and the upper and lower elastomer sealing rings are attached to extrude and seal the polish rod. The sealing strength adjusting assembly is composed of a controller, an electric telescopic rod and a pressure sensor, the sealing strength can be adjusted according to pressure feedback, an annular cold water channel is formed in the lower sealing cover and matched with a water inlet, a water outlet, an electric control valve and a temperature sensor to achieve heat dissipation control, and polish rod penetrating holes are reserved in the centers of the upper sealing cover, the lower sealing cover and other components. And the controller adopts a programmable single chip microcomputer, so that intelligent adjustment can be realized, the sealing stability and the heat dissipation performance are improved, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of oil extraction equipment technology, and in particular to a stable oil pumping unit polished rod seal. Background Technology

[0002] In oil extraction operations, pumping units are extremely important equipment, and polished rod seals are one of the key components of pumping units. Their main function is to prevent the leakage of crude oil, natural gas, and other media at the wellhead, ensuring the safety and environmental protection of the extraction process, while also guaranteeing the normal operation of the pumping unit.

[0003] Existing polished rod seals for oil pumping units suffer from several problems. Firstly, the sealing effect is unstable. With prolonged operation, the polished rod undergoes continuous up-and-down motion, causing wear and tear on the sealing components due to friction. This leads to decreased sealing performance and media leakage, wasting resources and polluting the environment. Secondly, existing seals struggle to flexibly adjust the sealing strength according to actual operating conditions. When changes occur in pressure, temperature, or other factors affecting the polished rod, the sealing force cannot be adjusted promptly and effectively, impacting the sealing effect. Furthermore, the oil pumping unit generates significant heat during operation. Excessive heat accelerates the aging and damage of the sealing components, further reducing sealing performance, and existing seals often exhibit poor heat dissipation capabilities.

[0004] Therefore, developing a sucker rod seal that can provide a stable sealing effect, flexibly adjust the sealing strength, and has good heat dissipation performance is of great practical significance. Summary of the Invention

[0005] The purpose of this application is to provide a stable oil pumping unit polished rod seal to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a stable oil pumping unit polished rod seal, comprising a sealer housing, which includes an upper sealing cover and a lower sealing cover, wherein the upper sealing cover and the lower sealing cover are slidably sleeved together; A sealing assembly, disposed within a sealing ring housing for compressing and sealing the polished rod of a pumping unit, comprises an upper elastomeric sealing ring and a lower elastomeric sealing ring. The upper elastomeric sealing ring and the lower elastomeric sealing ring are respectively fixedly installed at the top of the inner cavity of the upper sealing cover and the bottom of the inner cavity of the lower sealing cover. The upper elastomeric sealing ring has a frustum-shaped hole at its center, which is smaller at the top and larger at the bottom. The lower elastomeric sealing ring is also frustum-shaped, with its outer wall fitting against the inner wall of the frustum-shaped hole. A sealing strength adjustment assembly includes a controller, an electric telescopic rod, and a pressure sensor. The controller is fixed inside the lower sealing cover and is electrically connected to the electric telescopic rod and the pressure sensor. The pressure sensor is fixed to the inner wall of the lower sealing cover and contacts the outer wall of the upper elastomer sealing ring. The electric telescopic rod is fixed inside the lower sealing cover and its output end is fixedly connected to the upper sealing cover.

[0007] Preferably, the lower sealing cover has an annular cold water channel arranged around its axis, and the annular cold water channel is connected to an inlet and an outlet respectively.

[0008] Preferably, both the upper and lower sealing covers are made of heat-dissipating metal material.

[0009] Preferably, an electrically controlled valve is fixedly installed on the water inlet, and a temperature sensor is fixedly installed inside the lower sealing cover.

[0010] Preferably, the controller is electrically connected to the temperature sensor and the electrically controlled valve.

[0011] Preferably, a through hole for a smooth rod is provided at the center of the upper sealing cover, the lower sealing cover, the upper elastic body sealing ring, and the lower elastic body sealing ring.

[0012] Preferably, the controller is a programmable microcontroller.

[0013] In summary, the technical effects and advantages of this invention are as follows: This invention, through the unique design of the upper and lower elastic sealing rings and the cooperation of the sealing strength adjustment component, can flexibly adjust the sealing strength according to the actual working conditions, effectively improving the stability of the sealing effect and reducing the risk of media leakage.

[0014] The use of annular cold water channels and heat-dissipating metal materials greatly enhances the heat dissipation performance of the seal, reduces the rate at which sealing components age and are damaged due to high temperatures, and extends the service life of the seal.

[0015] The closed-loop control system, consisting of a temperature sensor, an electronically controlled valve, and a controller, enables precise control of the seal temperature, ensuring that the seal maintains good working condition under different operating environments.

[0016] The programmable microcontroller acts as a controller, enabling the sealer to make intelligent adjustments based on preset programs and real-time data, thereby improving the automation level and adaptability of the equipment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a stable oil pumping unit polished rod seal in an embodiment of this application; Figure 2 This is a cross-sectional view of a stable oil pumping unit polished rod seal according to an embodiment of this application; Figure 3 This is a schematic diagram of the working state structure of a stable oil pumping unit polished rod seal in an embodiment of this application; Figure 4 This is a schematic diagram of the lower elastic body sealing ring structure of a stable oil pumping unit polished rod seal in an embodiment of this application; Figure 5 This is a schematic diagram of the upper elastic sealing ring structure of a stable oil pumping unit polished rod seal in an embodiment of this application.

[0019] In the diagram: 1. Upper sealing cap; 2. Lower sealing cap; 3. Oil pumping unit polished rod; 4. Polished rod perforation; 5. Upper elastomer sealing ring; 6. Lower elastomer sealing ring; 7. Electric telescopic rod; 8. Pressure sensor; 9. Controller; 10. Temperature sensor; 11. Annular cold water channel; 12. Water inlet; 13. Water outlet; 14. Electric control valve. Detailed Implementation

[0020] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure 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 this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] It should also be noted that all standard parts used in this application are commercially available, and can be custom-made according to the description and drawings. Unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances, and unless explicitly limited, machinery, parts, and equipment can all adopt conventional models in the prior art.

[0023] In this document, the term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] Example: Reference Figure 1-5 The illustrated stable oil pumping unit polished rod seal includes a sealer housing, a sealing assembly, and a sealing strength adjustment assembly.

[0025] The sealing device housing includes an upper sealing cover 1 and a lower sealing cover 2, which are slidably fitted together. This slidable fitting design allows the upper sealing cover 1 to slide up and down relative to the lower sealing cover 2, providing a basis for subsequent adjustment of the sealing strength.

[0026] The sealing assembly, housed within the sealing ring housing, is used to compress and seal the polished rod 3 of the pumping unit. It comprises an upper elastic sealing ring 5 and a lower elastic sealing ring 6. The upper elastic sealing ring 5 and the lower elastic sealing ring 6 are respectively fixedly installed at the top of the inner cavity of the upper sealing cover 1 and the bottom of the inner cavity of the lower sealing cover 2. The upper elastic sealing ring 5 has a frustum-shaped hole at its center, smaller at the top and larger at the bottom. The lower elastic sealing ring 6 is also frustum-shaped, with its outer wall fitting against the inner wall of the frustum-shaped hole. When the upper and lower sealing covers move relative to each other, the degree of contact between the upper elastic sealing ring 5 and the lower elastic sealing ring 6 changes, thereby achieving different degrees of compression sealing of the polished rod.

[0027] The sealing strength adjustment assembly includes a controller 9, an electric telescopic rod 7, and a pressure sensor 8. The controller 9 is fixed inside the lower sealing cover 2 and electrically connected to the electric telescopic rod 7 and the pressure sensor 8. The pressure sensor 8 is fixed to the inner wall of the lower sealing cover 2 and contacts the outer wall of the upper elastomer sealing ring 5, used to monitor the pressure on the upper elastomer sealing ring 5 in real time. The electric telescopic rod 7 is fixed inside the lower sealing cover 2, and its output end is fixedly connected to the upper sealing cover 1. Based on the pressure signal fed back by the pressure sensor 8, the controller 9 controls the extension and retraction of the electric telescopic rod 7, thereby adjusting the relative position of the upper sealing cover 1 and the lower sealing cover 2, and thus adjusting the sealing strength.

[0028] Furthermore, the lower sealing cover 2 has an annular cold water channel 11 arranged around its axis inside, and the annular cold water channel 11 is connected to a water inlet 12 and a water outlet 13 respectively. By introducing cold water into the annular cold water channel 11, the heat generated by the seal during operation can be effectively removed, the temperature of the sealing component can be reduced, and its service life can be extended.

[0029] Furthermore, both the upper sealing cover 1 and the lower sealing cover 2 are made of heat-dissipating metal material. Heat-dissipating metal material has excellent thermal conductivity, enabling it to quickly conduct heat from inside the seal to the outside, thus enhancing the heat dissipation effect.

[0030] Furthermore, an electrically controlled valve 14 is fixedly installed on the water inlet 12, and a temperature sensor 10 is fixedly installed inside the lower sealing cover 2. The temperature sensor 10 is used to monitor the temperature inside the seal in real time. The controller 9 controls the opening and closing of the electrically controlled valve 14 and the opening degree according to the temperature signal fed back by the temperature sensor 10, thereby adjusting the flow rate of cold water entering the annular cold water channel 11 and realizing precise control of the seal temperature.

[0031] Furthermore, the controller 9 is electrically connected to the temperature sensor 10 and the electronically controlled valve 14 to form a closed-loop control system, ensuring that the seal operates in a suitable temperature environment.

[0032] Furthermore, the upper sealing cover 1, the lower sealing cover 2, the upper elastic sealing ring 5, and the lower elastic sealing ring 6 are provided with a through hole 4 for the smooth rod to pass through, so as to ensure the normal operation of the pumping unit.

[0033] Furthermore, the controller 9 is a programmable microcontroller. The programmable microcontroller possesses powerful computing and control capabilities, enabling it to precisely control the actions of the electric telescopic rod 7 and the electric valve 14 based on preset programs and real-time collected pressure, temperature, and other data, thereby achieving intelligent adjustment of sealing strength and temperature.

[0034] Installation process Slide the upper sealing cover 1 and the lower sealing cover 2 together to ensure that they can slide smoothly relative to each other.

[0035] The upper elastic body sealing ring 5 is fixedly installed on the top of the inner cavity of the upper sealing cover 1, and the lower elastic body sealing ring 6 is fixedly installed on the bottom of the inner cavity of the lower sealing cover 2, so that the outer wall of the lower elastic body sealing ring 6 fits against the inner wall of the frustum hole of the upper elastic body sealing ring 5.

[0036] Install the electric telescopic rod 7, fix it inside the lower sealing cover 2, and fix its output end to the upper sealing cover 1.

[0037] Install the pressure sensor 8 and fix it to the inner wall of the lower sealing cover 2 so that it contacts the outer wall of the upper elastomer sealing ring 5.

[0038] Temperature sensor 10 is installed inside the lower sealing cover 2, and an electric control valve 14 is installed at the water inlet 12.

[0039] The controller 9 is fixed inside the lower sealing cover 2, and the controller 9 is electrically connected to the electric telescopic rod 7, pressure sensor 8, temperature sensor 10 and electric control valve 14 according to the circuit connection relationship.

[0040] The light rod is passed through the light rod through hole 4 of the upper sealing cover 1, the lower sealing cover 2, the upper elastic body sealing ring 5, and the lower elastic body sealing ring 6 to complete the installation of the seal.

[0041] Work process Sealing strength adjustment: When the pumping unit starts working, the polished rod reciprocates up and down. Pressure sensor 8 monitors the pressure on the upper elastic sealing ring 5 in real time and transmits the pressure signal to controller 9. Controller 9 compares and analyzes the preset pressure value with the received pressure signal. If the pressure is lower than the preset value, it indicates insufficient sealing strength. Controller 9 controls the electric telescopic rod 7 to extend, pushing the upper sealing cover 1 downward to make the fit between the upper elastic sealing ring 5 and the lower elastic sealing ring 6 tighter, thereby increasing the compression sealing force on the polished rod. Conversely, if the pressure is higher than the preset value, controller 9 controls the electric telescopic rod 7 to shorten, and the upper sealing cover 1 to move upward, reducing the sealing force and achieving automatic adjustment of sealing strength.

[0042] Heat dissipation control: Temperature sensor 10 monitors the internal temperature of the seal in real time and transmits the temperature signal to controller 9. When the temperature exceeds the preset upper temperature limit, controller 9 controls the solenoid valve 14 to open and adjusts the opening degree of solenoid valve 14 according to the temperature, allowing cold water to enter the annular cold water channel 11. The cold water flows in the annular cold water channel 11, carrying away the heat generated by the seal, and then flows out from the outlet 13. When the temperature drops below the preset lower temperature limit, controller 9 controls the solenoid valve 14 to close, stopping the supply of cold water, thus achieving precise control of the seal temperature.

[0043] Maintenance process Regularly check whether the connections of all parts of the seal are secure, and tighten them promptly if any are loose.

[0044] Check the wear of the upper elastomer sealing ring 5 and the lower elastomer sealing ring 6. If the wear is severe, replace them in time.

[0045] Regularly clean the annular cold water channel 11 to prevent impurities from clogging it and ensure normal flow of cold water.

[0046] Check the working status of controller 9, electric telescopic rod 7, pressure sensor 8, temperature sensor 10 and electric control valve 14. If there is any fault, repair or replace them in time.

[0047] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stable oil pumping unit polished rod seal, characterized in that: include: The sealing housing includes an upper sealing cover (1) and a lower sealing cover (2), which are slidably sleeved together. A sealing assembly is provided inside the sealing ring housing for compressing and sealing the polished rod (3) of the pumping unit. It includes an upper elastic body sealing ring (5) and a lower elastic body sealing ring (6). The upper elastic body sealing ring (5) and the lower elastic body sealing ring (6) are respectively fixedly installed at the top of the inner cavity of the upper sealing cover (1) and the bottom of the inner cavity of the lower sealing cover (2). The upper elastic body sealing ring (5) has a frustum hole with a smaller upper part and a larger lower part at its center. The lower elastic body sealing ring (6) is a frustum with a smaller upper part and a larger lower part, and its outer wall is in contact with the inner wall of the frustum hole. The sealing strength adjustment assembly includes a controller (9), an electric telescopic rod (7), and a pressure sensor (8). The controller (9) is fixed inside the lower sealing cover (2) and is electrically connected to the electric telescopic rod (7) and the pressure sensor (8). The pressure sensor (8) is fixed to the inner wall of the lower sealing cover (2) and is in contact with the outer wall of the upper elastomer sealing ring (5). The electric telescopic rod (7) is fixed inside the lower sealing cover (2) and its output end is fixedly connected to the upper sealing cover (1).

2. The stable oil pumping unit polished rod seal according to claim 1, characterized in that: The lower sealing cover (2) has an annular cold water channel (11) arranged around its axis inside, and the annular cold water channel (11) is connected to the inlet (12) and the outlet (13).

3. The stable oil pumping unit polished rod seal according to claim 1, characterized in that: Both the upper sealing cover (1) and the lower sealing cover (2) are made of heat-dissipating metal material.

4. A stable oil pumping unit polished rod seal according to claim 2, characterized in that: An electric control valve (14) is fixedly installed on the water inlet (12), and a temperature sensor (10) is fixedly installed inside the lower sealing cover (2).

5. A stable oil pumping unit polished rod seal according to claim 1, characterized in that: The controller (9) is electrically connected to the temperature sensor (10) and the electric control valve (14).

6. A stable oil pumping unit polished rod seal according to claim 1, characterized in that: A through hole (4) for a smooth rod is reserved at the center of the upper sealing cover (1), the lower sealing cover (2), the upper elastic body sealing ring (5), and the lower elastic body sealing ring (6).

7. A stable oil pumping unit polished rod seal according to claim 1, characterized in that: The controller (9) is a programmable microcontroller.

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