Environment-friendly blowout prevention type sealing device
By designing an environmentally friendly blowout sealing device, the combination of the spherical pack box and polyurethane rubber valve is used to solve the problem of well fluid spray caused by the biased grinding and breakage of the bar in oil well production, and the sealing performance is improved and the environmentally friendly leak-proof effect is achieved.
Patent Information
- Application Number
- CN202421611561.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-07-09
AI Technical Summary
During the oil well production process, the long-term up and down movement of the oil pump's bar leads to severe wear of the pack, which requires frequent replacement, delaying the production cycle; after the bar breaks, the well fluid in the wellhead is sprayed out of the polluted environment, causing the sealing tool to have a low life and delaying the production progress.
An environmentally friendly anti-blast sealing device is designed, including a cross valve body, rubber valve, ball pack box, anti-blasting pressure cover and nylon anti-blasting ball. Through the spherical connection of the ball pack box and the use of polyurethane rubber valve, it ensures that the bar and the pack box always maintain a central position to prevent biased grinding; when the bar breaks, the anti-blasting ball blocks the bar hole to prevent well fluid from spraying.
It effectively prevents the bar from being too far, extends the service life of the sealing device, improves work efficiency, and prevents the well fluid from being sprayed when the bar breaks, playing an environmentally friendly and leak-proof role.
Smart Images
Figure CN222686640U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil wells for oil fields, in particular to an environmentally friendly anti-blowout sealing device. Background Art
[0002] During the oil well production process, the pumping unit rod moves up and down for a long time, which will cause eccentric wear, resulting in serious wear of the packing, which needs to be replaced frequently, delaying the production cycle. In addition, the rod breaks and the well fluid in the wellhead sprays out and pollutes the environment, which causes the sealing tool life to be shortened and the production progress to be delayed. Utility Model Content
[0003] In view of the above problems, the purpose of the utility model is to provide an environmentally friendly anti-blowout sealing device for solving the problem of packing wear and effectively preventing blowout after the polished rod breaks.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] An environmentally friendly anti-blowout sealing device comprises: a cross-shaped valve body, a rubber valve, a top screw, a ball lock nut, a ball packing box, an anti-blowout pressure cover, an anti-blowout ball, a packing pressure cover, and a sheath; one end of the light rod channel of the cross-shaped valve body is connected to the oil pipe through a lower joint, and the other end of the light rod channel is sealed and connected to the ball packing box through an upper joint; the rubber valve is installed in the sealing joints on both sides of the light rod channel; the rubber valve is movably connected in the sealing joint through a top screw, and the top screw is rotated to adjust the gap between the rubber valve and the light rod The ball head end of the ball packing box is inserted into the upper joint, the ball lock nut is threadedly connected to the upper joint and seals the ball head end to the upper joint, the tail end of the ball packing box is threadedly connected to the anti-blowout pressure cover, and an anti-blowout ball is arranged in the internal cavity of the anti-blowout pressure cover. The anti-blowout ball is used to block the light rod hole of the anti-blowout pressure cover after the light rod breaks, and the sleeve and the packing pressure cover are arranged at the front and rear ends of the inner cavity of the ball packing box, and the light rod passes through the cross-shaped valve body, the ball packing box and the anti-blowout pressure cover in sequence.
[0006] As a preferred embodiment of the utility model, the shape of the inner cavity of the upper joint is a sphere corresponding to the ball head end, or the inner cavity of the upper joint is provided with a spherical washer, the shape of the spherical washer corresponds to the ball head end, and the spherical inner cavity or spherical washer of the upper joint is used to keep the bare rod and the spherical packing box in the center position at all times.
[0007] As a preferred embodiment of the present invention, the rubber valve is a polyurethane rubber valve, and the spherical packing box is filled with polyurethane packing.
[0008] As a preferred embodiment of the utility model, the diameter of the blowout preventer ball is larger than the diameter of the polished rod hole. When the polished rod breaks and slides down, the well fluid in the oil well enters the cavity of the blowout preventer pressure cap through the cross-shaped valve body and the ball packing box in sequence. The well fluid entering the cavity of the blowout preventer pressure cap drives the blowout preventer ball to flow to the polished rod hole and blocks the polished rod hole.
[0009] As a preferred embodiment of the utility model, a threaded sleeve is fixedly connected to the inside of the rubber valve, a top screw hole is provided in the sealing joint, a gasket is fixedly connected to the tail end of the top screw, the diameter of the gasket is larger than the diameter of the top screw hole, the front end of the top screw passes through the top screw hole and is threadedly connected to the threaded sleeve, and the threaded sleeve is driven to move up and down on the top screw during rotation, thereby driving the rubber valve to move up and down in the sealing joint, thereby completing the gap adjustment between the rubber valve and the polished rod.
[0010] As a preferred embodiment of the present invention, the end of the rubber valve is semicircular, and the semicircular ends of the rubber valves in the two sealing joints surround and seal the polished rod.
[0011] As a preferred embodiment of the present invention, the anti-blowout ball is a nylon anti-blowout ball.
[0012] The advantages and positive effects of the utility model are:
[0013] 1. The rubber valve of the utility model adopts a polyurethane rubber valve, which has the advantages of wear resistance, oil resistance, high rebound, distortion resistance, excellent mechanical properties, etc.
[0014] 2. The spherical packing box of the utility model adopts a spherical connection and has an adjustable center line, so that the polished rod and the packing box always maintain the same center position, effectively preventing the eccentric wear of the polished rod.
[0015] 3. The blowout-proof pressure cap of the utility model is internally provided with a nylon blowout-proof ball. When the polished rod is broken, the nylon blowout-proof ball instantly blocks the polished rod hole of the blowout-proof pressure cap to prevent the well fluid in the pumping well from spraying out, thus playing an environmental protection and leakage prevention role.
[0016] 4. The spherical packing box of the utility model is equipped with high-performance polyurethane packing, which can extend the service life of the spherical packing box, increase the sealing performance and improve the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a sectional view of the overall structure of the utility model.
[0018] Figure numerals: cross-shaped valve body 1, rubber valve 2, top screw 3, ball lock nut 4, ball packing box 5, blowout prevention cover 6, blowout prevention ball 7, packing cover 8, sleeve 9, smooth rod channel 10, lower joint 11, upper joint 12, sealing joint 13, cavity 14, smooth rod hole 15, spherical washer 16, gasket 17. DETAILED DESCRIPTION
[0019] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.
[0020] See also Figure 1 The present embodiment provides an environmentally friendly anti-blowout sealing device, comprising: a cross-shaped valve body 1, a rubber valve 2, a top screw 3, a ball lock nut 4, a ball packing box 5, an anti-blowout pressure cap 6, an anti-blowout ball 7, a packing pressure cap 8, and a sheath 9. One end of the light rod channel 10 of the cross-shaped valve body 1 is connected to the oil well tubing through a lower joint 11, and the other end of the light rod channel 10 is sealed and connected to the ball packing box 5 through an upper joint 12. The rubber valves 2 are installed in the sealing joints 13 on both sides of the light rod channel 10. The rubber valves 2 are movably connected in the sealing joints 13 through the top screws 3. The function of the top screws 3 is to adjust the gap between the rubber valve 2 and the light rod. The ball head end of the ball packing box 5 is inserted into the sealing joint 13. Connected in the upper joint 12, the ball lock nut 4 is threadedly connected to the upper joint 12 as a sealing gland for sealing the ball head end with the upper joint 12, the tail end of the ball packing box 5 is threadedly connected to the anti-blowout gland 6, and the internal cavity 14 of the anti-blowout gland 6 is provided with an anti-blowout ball 15, which is used to block the light rod hole 15 of the anti-blowout gland 6 after the light rod breaks, and the front and rear ends of the inner cavity of the ball packing box 5 are provided with a sleeve 9 and a packing gland 8, and the sleeve 9 can improve the wear resistance of the inside of the ball packing box 5. The packing (not shown) and the packing gland 8 inside the ball packing box 5 are made of polyurethane, so that the wear resistance of the ball packing box 5 is further improved. The polished rod of the pumping unit on the oil well tubing passes through the cross valve body, the ball packing box and the anti-blowout gland in sequence.
[0021] Furthermore, the inner cavity of the upper joint 12 in this embodiment is provided with a spherical washer 16, the shape of which corresponds to the ball head end. The spherical washer 16 is used to keep the polished rod and the spherical packing box 5 at the center position at all times to prevent the polished rod from being worn eccentrically.
[0022] Furthermore, the rubber valve 2 in this embodiment is a polyurethane rubber valve, the ball packing box 5 is filled with polyurethane packing, and the anti-blowout ball 7 is a nylon anti-blowout ball.
[0023] Furthermore, the diameter of the blowout preventer ball 7 in this embodiment is larger than the diameter of the polished rod hole 15. When the polished rod breaks and slides, the well fluid in the oil well enters the cavity 14 of the blowout preventer gland 6 through the cross-shaped valve body 1 and the ball packing box 5 in sequence. The well fluid entering the cavity 14 drives the blowout preventer ball 7 to flow toward the polished rod hole 15 and blocks the polished rod hole 15.
[0024] Furthermore, the rubber valve 2 in this embodiment is fixedly connected with a threaded sleeve inside, a top screw hole is provided in the sealing joint 13, a gasket 17 is fixedly connected to the tail end of the top screw 3, the diameter of the gasket 17 is larger than the diameter of the top screw hole, the front end of the top screw 3 passes through the top screw hole and is threadedly connected with the threaded sleeve, and the top screw 3 can only rotate in the top screw hole due to the limitation of the gasket 17. During the rotation process, the top screw 3 drives the threaded sleeve to move up and down on the top screw, thereby driving the rubber valve 2 to move up and down in the sealing joint 13, thereby completing the gap adjustment between the rubber valve 2 and the polished rod.
[0025] Furthermore, in this embodiment, the end of the rubber valve 2 is semicircular, and the semicircular ends of the rubber valve 2 in the two sealing joints 13 surround and seal the polished rod.
[0026] Working principle: The lower joint 11 of the cross valve body 1 is connected to the oil well tubing with a polished rod, and the polished rod is inserted into the cross valve body 1, and then passed through the ball packing box 5 and the blowout prevention gland 6. Among them, the top screw 3 is adjusted to achieve a reasonable gap between the rubber valve 2 and the polished rod. Tighten the glands at each part to achieve a sealing effect. The sealing performance is guaranteed during the operation of the polished rod. The ball packing box 5 keeps the polished rod in the center position and can be automatically adjusted to prevent the polished rod from wearing eccentrically. The blowout prevention ball 7 is provided in the blowout prevention gland 6. After the polished rod breaks, the blowout prevention ball 7 promptly prevents the oil from spraying out of the wellhead, which plays an environmental protection role.
[0027] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.
Claims
1. An environmentally friendly anti-blowout sealing device, characterized in that: include: A cross-shaped valve body, a rubber valve, a top screw, a ball lock nut, a ball packing box, a blowout-proof gland, a blowout-proof ball, a packing gland, and a sheath. One end of the light rod channel of the cross-shaped valve body is connected to the oil pipe through a lower joint, and the other end of the light rod channel is sealed and connected to the ball packing box through an upper joint. The rubber valve is installed in the sealing joints on both sides of the light rod channel. The rubber valve is movably connected in the sealing joint through a top screw. The top screw is rotated to adjust the gap between the rubber valve and the light rod. The ball packing box The ball head end is inserted into the upper joint, the ball lock nut is threadedly connected to the upper joint and seals the ball head end to the upper joint, the tail end of the ball packing box is threadedly connected to the anti-blowout pressure cover, and an anti-blowout ball is arranged in the internal cavity of the anti-blowout pressure cover. The anti-blowout ball is used to block the light rod hole of the anti-blowout pressure cover after the light rod breaks, the front and rear ends of the inner cavity of the ball packing box are provided with the sleeve and the packing pressure cover, and the light rod passes through the cross-shaped valve body, the ball packing box and the anti-blowout pressure cover in sequence.
2. The environmentally friendly anti-blowout sealing device according to claim 1, characterized in that: The shape of the inner cavity of the upper joint is a sphere corresponding to the ball head end, or the inner cavity of the upper joint is provided with a spherical washer, the shape of the spherical washer corresponds to the ball head end, and the spherical inner cavity or spherical washer of the upper joint is used to keep the polished rod and the spherical packing box in the center position at all times.
3. The environmentally friendly anti-blowout sealing device according to claim 1, characterized in that: The rubber valve is a polyurethane rubber valve, and polyurethane packing is installed in the spherical packing box.
4. The environmentally friendly anti-blowout sealing device according to claim 1, characterized in that: The diameter of the blowout preventer ball is larger than the diameter of the polished rod hole. When the polished rod breaks and slides, the well fluid in the oil well enters the cavity of the blowout preventer gland through the cross-shaped valve body and the ball packing box in sequence. The well fluid entering the cavity of the blowout preventer gland drives the blowout preventer ball to flow to the polished rod hole and blocks the polished rod hole.
5. The environmentally friendly anti-blowout sealing device according to claim 1, characterized in that: A threaded sleeve is fixedly connected to the inside of the rubber valve, a top screw hole is provided in the sealing joint, a gasket is fixedly connected to the tail end of the top screw, the diameter of the gasket is larger than the diameter of the top screw hole, the front end of the top screw passes through the top screw hole and is threadedly connected to the threaded sleeve, and the top screw drives the threaded sleeve to move up and down on the top screw during rotation, thereby driving the rubber valve to move up and down in the sealing joint.
6. The environmentally friendly anti-blowout sealing device according to claim 1, characterized in that: The end of the rubber valve is semicircular, and the semicircular ends of the rubber valves in the two sealing joints surround and seal the polished rod.
7. The environmentally friendly anti-blowout sealing device according to claim 1, characterized in that: The anti-blowout ball is a nylon anti-blowout ball.