A sucker rod seal for use with a pressurized light rod

Abstract

The utility model discloses a kind of sucker rod sealers for light rod with pressure replacement, it is related to the technical field of operation equipment with pressure;Including sealer main body, sucker rod pump and oil tank, the inside left and right two sides of sealer main body are all provided with moving groove, the inside of two moving grooves is movably sleeved with sealing block, the opposite side of two sealing blocks is all fixedly connected with connecting rod, the end of two connecting rods respectively far from two sealing blocks is all fixedly connected with sliding block, the inside left and right two sides of sealer main body are all provided with oil groove, the opposite side of the inside of two oil grooves is all fixedly connected with spring, the position of the left and right two sides of two oil grooves close to top and bottom is all fixedly installed with slide bar, the left and right two sides of the outer surface of sealer main body are all fixedly connected with connecting end, the opposite side of two connecting ends is provided with shunt pipe, the inside of sealer main body is provided with lifting groove, the inside of lifting groove is provided with light rod.

Description

Technical Field

[0001] This utility model relates to the technical field of live-line working equipment, specifically to a sucker rod seal for live-line oil change rods. Background Technology

[0002] The polished rod plays a crucial role in oil extraction, its main function being to connect the pumping unit and the sucker rod, transmitting power from the pumping unit to extract oil from the ground. Due to prolonged operation in complex environments and corrosive media, polished rods frequently suffer damage and corrosion. Failure to replace them promptly can not only affect oil extraction efficiency but also lead to packing leakage, polished rod breakage, environmental pollution, and increased labor intensity and safety risks for workers.

[0003] Chinese utility model patent CN222731517U discloses a sucker rod sealer for live rod replacement under pressure, relating to the technical field of live operation equipment. This utility model includes a housing and sealing components installed on both sides of the housing. The housing includes a shell with interconnected inner cavities, a lower connecting pipe, and an upper connecting pipe. The lower connecting pipe is coaxially arranged with the tubing and its lower end is connected to a well tee. The shell is fixed to the top of the lower connecting pipe, and the upper connecting pipe is fixed to the top of the shell, with its upper end connected to a well tee. The sealer is installed on the well tee. When replacing the polished rod, the bottom end of the polished rod is raised above the sealer, and the screw is turned to drive the sealing strips to slide, causing the sealing strips on both sides to clamp the sucker rod, thus closing the flow channel in the tubing at the lower end of the polished rod under pressure, thereby facilitating polished rod replacement. This device facilitates polished rod replacement, increases efficiency, saves costs, avoids the discharge of crude oil during pressure release, depressurization, and well washing operations, and reduces the pollution of formation oil and gas and the surface caused by clean water well washing. Traditional seals struggle to achieve reliable seals under pressure, easily leading to leaks of pressurized gas or liquid within the well. Current technologies for replacing polished rods involve cumbersome procedures requiring significant manual intervention, resulting in low efficiency. During live polished rod replacement, issues such as incomplete sealing pose high safety risks, potentially endangering personnel safety and disrupting equipment operation. Traditional seals also struggle to achieve satisfactory seals on tubing of varying sizes or with slight deviations, limiting their applicability. Therefore, a new sucker rod seal for live polished rod replacement is needed to address these issues. Summary of the Invention

[0004] This invention provides a sucker rod seal for a pressurized oil change rod to solve the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sucker rod seal for pressurized rod replacement, comprising a seal body, a sucker pump, and an oil tank. The seal body has movable grooves on both its left and right inner side walls. Sealing blocks are movably fitted inside each of the two movable grooves. Connecting rods are fixedly connected to opposite sides of each of the two sealing blocks. Slider blocks are fixedly connected to the ends of each connecting rod away from the two sealing blocks. Oil grooves are formed on both the left and right inner side walls of the seal body. Springs are fixedly connected to opposite sides of each of the two oil grooves. Sliding rods are fixedly installed on the left and right inner side walls of each of the two oil grooves near the top and bottom. Connecting ends are fixedly connected to the left and right outer side walls of the seal body. Diverter pipes are provided on opposite sides of the two connecting ends. A lifting groove is formed inside the seal body, and a sucker rod is installed inside the lifting groove.

[0006] Furthermore, the outer surface of the sealer body has mounting grooves on both the left and right side walls, and connecting pipes are fixedly connected inside the two mounting grooves.

[0007] Furthermore, the branching end of the branch pipe is fixedly connected to two connecting ends respectively.

[0008] Furthermore, the oil outlet of the oil pump is fixedly connected to the end of the diverter pipe away from the diverter pipe, the oil inlet of the oil pump is fixedly connected to an oil inlet pipe, and a control valve is provided on the diverter pipe.

[0009] Furthermore, the oil outlet of the oil tank is fixedly connected to the end of the oil inlet pipe of the oil pump that is away from the oil pump.

[0010] Furthermore, the two sealing blocks are respectively movably connected to the interior of the two movable slots, and both movable slots are connected to the lifting slot.

[0011] Furthermore, connecting grooves are provided on the left side of both sliders near the top and bottom. The connecting grooves on the two sliders are respectively movably connected to the outer surface of the adjacent slider. The outer surface of the slider is movably connected to the inside of the groove. A sealing ring is provided at the connection between the slider and the groove. The opposite sides of the two springs are respectively fixedly connected to the adjacent sides of the two sliders.

[0012] Furthermore, the opposite ends of the two connecting pipes are respectively fixedly connected to the ends of the two connecting ends that are away from the diversion pipe, and the adjacent ends of the two connecting pipes respectively penetrate and extend into the interior of the two oil tanks, so that the connecting ends are connected to the oil tanks through the connecting pipes.

[0013] Compared with the prior art, this utility model provides a sucker rod seal for pressurized light-changing rods, which has the following advantages: 1. This live rod replacement sucker rod sealer uses hydraulic pressure to push a sealing block, achieving a tight seal on the tubing and effectively preventing leakage of pressurized gas or liquid from the well. Sealing is completed simply by starting the pump, and the sealing block automatically resets after the pump stops, making operation simple and convenient. It allows for rod replacement under pressure, reducing safety risks and ensuring the safety of personnel and normal equipment operation. It automatically adjusts the sealing block position according to changes in hydraulic pressure, adapting to tubing of different sizes or with slight deviations. It prevents corrosive gases or liquids from damaging the equipment, reducing maintenance costs. The sealing block's extension and retraction are automatically controlled by hydraulic pressure, achieving automated sealing and unsealing. Its reasonable structure facilitates disassembly and maintenance, ensuring long-term stable operation. Hydraulic flow and pressure are regulated by a control valve, preventing hydraulic waste. It prevents well fluid leakage, reducing environmental pollution. It enables rapid rod replacement and sealing, reducing downtime and increasing production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model is made by Figure 1 A magnified view of point A derived from this.

[0015] In the diagram: 1. Sealer body; 2. Smooth rod; 3. Diverter pipe; 4. Connecting end; 5. Slider; 6. Moving groove; 7. Sealing block; 8. Connecting pipe; 9. Oil pump; 10. Connecting rod; 11. Lifting groove; 12. Oil tank; 13. Oil reservoir; 14. Spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-2This utility model discloses a sucker rod seal for pressurized replacement of polished rods, including a seal body 1, a sucker pump 9, and an oil tank 13. The seal body has movable grooves 6 on both its left and right sides. Sealing blocks 7 are movably fitted inside each of the two movable grooves 6. Connecting rods 10 are fixedly connected to opposite sides of each of the two sealing blocks 7. Slider 5s are fixedly connected to the ends of each connecting rod 10 away from the two sealing blocks 7. Oil grooves 1 are formed on both the left and right sides inside the seal body 1. Springs 14 are fixedly connected to opposite sides of the interior of each of the two oil grooves 1. Sliding rods are fixedly installed on the left and right sides of the left and right sides of the left and right sides of the two oil grooves 1 near the top and bottom. Connecting ends 4 are fixedly connected to the left and right sides of the outer surface of the seal body 1. Diverter pipes 3 are provided on opposite sides of the two connecting ends 4. A lifting groove 11 is formed inside the seal body 1, and a polished rod 2 is installed inside the lifting groove 11.

[0018] Specifically, mounting grooves are provided on both the left and right sides of the outer surface of the sealer body 1, and connecting pipes 8 are fixedly connected inside the two mounting grooves.

[0019] Specifically, the branching end of the branch pipe 3 is fixedly connected to two connecting ends 4 respectively.

[0020] Specifically, the oil outlet of the oil pump 9 is fixedly connected to the end of the diverter pipe 3 away from the diverter pipe, the oil inlet of the oil pump 9 is fixedly connected to an oil inlet pipe, and a control valve is installed on the diverter pipe 3.

[0021] Specifically, the oil outlet of the oil tank 13 is fixedly connected to the end of the oil inlet pipe of the oil pump 9 that is furthest from the oil pump 9.

[0022] Specifically, the two sealing blocks 7 are respectively connected to the interior of the two moving grooves 6, and both moving grooves 6 are connected to the lifting groove 11.

[0023] Specifically, connecting grooves are provided on the left side of both sliders 5 near the top and bottom. The connecting grooves on the two sliders 5 are movably connected to the outer surface of the adjacent slide rod, and the outer surface of the slider 5 is movably connected to the inside of the slide groove. A sealing ring is provided at the connection between the slider 5 and the slide groove. The opposite sides of the two springs 14 are fixedly connected to the adjacent sides of the two sliders 5.

[0024] Specifically, the opposite ends of the two connecting pipes 8 are fixedly connected to the ends of the two connecting ends 4 away from the diversion pipe 3, and the adjacent ends of the two connecting pipes 8 pass through and extend into the interior of the two oil tanks 1, so that the connecting ends 4 are connected to the oil tanks 1 through the connecting pipes 8.

[0025] In this embodiment, the main body 1 of the sealer includes packing, packing box, clamping device, guide ring, blowout preventer assembly, pressure relief hole, connecting parts and auxiliary seals.

[0026] During use, install the seal body 1 at the wellhead of the pumping unit, ensuring a tight connection to prevent leakage; fix the oil outlet of the pumping pump 9 to the end of the diversion pipe 3 furthest from the diversion end, connect the oil inlet of the pumping pump 9 to the inlet pipe, and connect the other end of the inlet pipe to the oil outlet of the oil tank 13; fix the diversion ends of the diversion pipe 3 to the connecting ends 4 on the left and right side walls of the outer surface of the seal body 1; extend the adjacent ends of the two connecting pipes 8 through and into the oil grooves 12 on the left and right sides inside the seal body 1, and fix the opposite ends of the connecting pipes 8 to the ends of the connecting ends 4 furthest from the diversion pipe 3; install all the internal components of the seal body 1, ensuring that the sealing block 7 is movably fitted with the moving groove 6, and that the moving groove 6 is connected to the lifting groove 11; the connecting groove on the slider 5 is movably fitted with the sliding rod, a sealing ring is installed between the slider 5 and the sliding groove, and the spring 14 is connected to the slider 5; check the tightness of each connection to ensure that the seal body 1 is securely installed. The connection is leak-free; the oil pump 9 is started, and the oil pump 9 draws oil from the oil tank 13 through the oil inlet pipe, providing power and oil support for the sealing operation; the oil drawn by the oil pump 9 flows into the two connecting pipes 8 through the branch end of the branch pipe 3, and then flows into the oil tank 12 along the connecting pipes 8; as the oil in the oil tank 12 gradually increases, the oil will exert pressure on the slider 5, pushing the slider 5 to move along the sliding rod towards the moving groove 6; during the movement, the slider 5 drives the sealing block 7 to move together through the connecting rod 10, so that the sealing block 7 passes through the moving groove 6 and extends into the interior of the lifting groove 11, thereby achieving the sealing of the oil pipe and preventing the leakage of pressurized gas or liquid in the well; when the new polished rod 2 is lowered into place, the operation of the oil pump 9 is stopped, so that the oil stops flowing; as the hydraulic pressure in the oil tank 12 gradually decreases, under the action of the spring 14, the sealing block 7 gradually resets, releasing the seal on the oil pipe, so as to facilitate subsequent production operations or other operations.

[0027] In summary, this live rod replacement sucker rod sealer uses oil pressure to push the sealing block 7, achieving a tight seal on the tubing and effectively preventing leakage of pressurized gas or liquid from the well. The sealing is completed simply by starting the pump 9, and the sealing block 7 automatically resets after the pump 9 stops, making operation simple and convenient. It allows for rod replacement under pressure, reducing safety risks and ensuring the safety of personnel and normal equipment operation. It automatically adjusts the position of the sealing block 7 according to changes in oil pressure, adapting to tubing of different sizes or with slight deviations. It prevents corrosive gases or liquids from damaging the equipment, reducing maintenance costs. The automatic extension and retraction of the sealing block 7, controlled by oil pressure, enables automated sealing and unsealing. Its reasonable structure facilitates disassembly and maintenance, ensuring long-term stable operation. The control valve regulates oil flow and pressure, preventing oil waste. It prevents well liquid leakage, reducing environmental pollution. It allows for rapid rod replacement and sealing, reducing downtime and increasing production.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sucker rod seal for pressurized oil change rods, comprising a seal body (1), an oil pump (9), and an oil tank (13), characterized in that: The sealing body (1) has movable grooves (6) on both the left and right sides inside. Each of the two movable grooves (6) is fitted with a sealing block (7). Each of the two sealing blocks (7) is fixedly connected to a connecting rod (10) on the opposite side. Each of the two connecting rods (10) is fixedly connected to a slider (5) at the end away from the two sealing blocks (7). Each of the two sealing bodies (1) has oil grooves (12) on both the left and right sides inside. Each of the two oil grooves (12) is fixedly connected to a spring (14) on the opposite side inside. Each of the two oil grooves (12) has a sliding rod fixedly installed on the left and right sides near the top and bottom. Each of the two outer surfaces of the sealing body (1) has a connecting end (4) fixedly connected to the left and right sides. Each of the two connecting ends (4) has a diversion pipe (3) on the opposite side. Each of the two sealing bodies (1) has a lifting groove (11) inside. Each of the lifting grooves (11) has a smooth rod (2) inside.

2. The sucker rod seal for a pressurized oil changer according to claim 1, characterized in that: The outer surface of the sealer body (1) has mounting grooves on both the left and right sides, and the interior of the two mounting grooves is fixedly connected with connecting pipes (8).

3. The sucker rod seal for a pressurized oil changer according to claim 1, characterized in that: The shunt end of the shunt pipe (3) is fixedly connected to two connecting ends (4) respectively.

4. The sucker rod seal for a pressurized light-changing rod according to claim 1, characterized in that: The oil outlet of the oil pump (9) is fixedly connected to the end of the diverter pipe (3) away from the diverter pipe. The oil inlet of the oil pump (9) is fixedly connected to an oil inlet pipe. A control valve is provided on the diverter pipe (3).

5. A sucker rod seal for a pressurized oil changer according to claim 1, characterized in that: The oil outlet of the oil tank (13) is fixedly connected to the end of the oil inlet pipe of the oil pump (9) away from the oil pump (9).

6. A sucker rod seal for a pressurized oil changer according to claim 1, characterized in that: The two sealing blocks (7) are respectively movably connected to the interior of the two moving slots (6), and the two moving slots (6) are connected to the lifting slot (11).

7. A sucker rod seal for a pressurized oil changer according to claim 1, characterized in that: Connecting grooves are provided on the left side of the two sliders (5) near the top and bottom. The connecting grooves on the two sliders (5) are respectively movably connected to the outer surface of the adjacent sliding rod. The outer surface of the slider (5) is movably connected to the inside of the sliding groove. A sealing ring is provided at the connection between the slider (5) and the sliding groove. The opposite sides of the two springs (14) are respectively fixedly connected to the adjacent sides of the two sliders (5).

8. A sucker rod seal for a pressurized oil changer according to claim 2, characterized in that: The opposite ends of the two connecting pipes (8) are fixedly connected to the ends of the two connecting ends (4) away from the diversion pipe (3). The adjacent ends of the two connecting pipes (8) pass through and extend into the interior of the two oil tanks (12), and the connecting ends (4) are connected to the oil tanks (12) through the connecting pipes (8).

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