Petroleum downhole plugging device

Abstract

The utility model discloses a petroleum downhole plugging device, which belongs to the technical field of petroleum wells and comprises an inner plugging mechanism, the inner plugging mechanism comprises a valve and a connecting component, and the valve is mounted at the end of the connecting component; the external plugging mechanism comprises a mounting assembly and an expansion assembly, the mounting assembly is fixedly connected with the connecting assembly, the expansion assembly is connected to the exterior of the mounting assembly in a sleeving mode, the expansion assembly is arranged corresponding to the inner wall of the petroleum well, and the valve is used for connecting and disconnecting the connecting assembly. And meanwhile, the other end of the connecting assembly can be communicated with the pipeline, conveying can be conducted temporarily by opening a valve, petroleum in the pipeline can be conveyed temporarily while the plugging speed is increased, and applicability and practicability are improved.

Description

Technical Field

[0001] The utility model relates to the field of oil wells, and more specifically, to an oil well downhole plugging device. Background Art

[0002] Oil is buried in oil and gas layers dozens of meters to several kilometers underground. To extract it, an oil and gas passage needs to be established between the ground and the underground oil and gas layers. This passage is the well. During the process of building an oil well, the pipeline is prone to rupture, and at this time, an oil well downhole plugging device is required to plug it.

[0003] The oil inside the pipeline will flow. When plugging the pipeline, when the plugging device is inserted, the pressure of the oil inside the pipeline will increase because the flowing space becomes smaller. The increased pressure makes it more laborious to plug the pipeline, reducing the plugging speed. The decrease in the plugging speed will cause more oil to flow out, resulting in more waste. How to invent an oil well downhole plugging device to improve these problems has become an urgent problem for those skilled in the art. Summary of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides an oil well downhole plugging device, aiming to improve the problem that when the plugging device is inserted, the pressure of the oil inside the pipeline increases because the flowing space becomes smaller, making it more laborious to plug the pipeline.

[0005] The utility model is realized as follows: An oil well downhole plugging device includes

[0006] an inner plugging mechanism, the inner plugging mechanism includes a valve and a connection component, and the valve is installed at the end of the connection component;

[0007] an outer plugging mechanism, the outer plugging mechanism includes a mounting component and an expansion component, the mounting component is fixedly connected to the connection component, the expansion component is sleeved outside the mounting component, and the expansion component is arranged corresponding to the inner wall of the oil well.

[0008] In a preferred technical solution of the utility model, the connection component includes a connecting pipe, and upper flanges are fixedly and hermetically connected to the top and bottom of the connecting pipe respectively.

[0009] In a preferred technical solution of the utility model, the valve is installed at the upper end of the connecting pipe.

[0010] In a preferred technical solution of the utility model, the mounting component includes a lower flange and a mounting pipe, the lower flange is fixedly installed on the upper top of the mounting pipe, and the lower flange and the upper flange at the bottom of the connecting pipe are hermetically connected by bolts.

[0011] In a preferred technical solution of the present utility model, a rubber sealing ring is provided between the upper flange and the lower flange.

[0012] In a preferred technical solution of the present utility model, the expansion assembly includes an outer protective airbag and an inner airbag. The inner airbag is sleeved on the installation pipe, the outer protective airbag is sleeved outside the inner airbag, both ends of the outer protective airbag are connected to the installation pipe in a limiting manner, an air delivery pipe is communicated with the inner airbag, and the air delivery pipe is communicated with the outside.

[0013] In a preferred technical solution of the present utility model, the air delivery pipe penetrates through the installation pipe on the back of the inner airbag and is communicated with the inner airbag, and the other end of the air delivery pipe penetrates through the installation pipe above the outer protective airbag and is communicated with the outside.

[0014] In a preferred technical solution of the present utility model, mounting rings are respectively fixedly connected to the upper and lower ends of the outer protective airbag, and hose clamps are respectively sleeved on the outside of the mounting rings in a limiting manner.

[0015] In a preferred technical solution of the present utility model, a limiting ring is fixedly sleeved on the outer wall of the installation pipe inside the mounting ring, and the mounting ring is locked to the outside of the limiting ring through a hose clamp.

[0016] The beneficial effects of the present utility model are as follows: A downhole oil plugging device obtained by the above design of the present utility model. When in use, the valve inside the connection assembly is opened, the installation assembly and the expansion assembly are inserted into the pipeline. By quickly inputting gas into the air delivery pipe, the gas expands the inner airbag, and the inner airbag expands the outer protective airbag. The mounting ring plugs the inner wall of the well or the pipeline. After fixing the positions of the inner plugging mechanism and the outer plugging mechanism, the valve can be closed. At the same time, a pipeline can be communicated at the other end of the connection assembly, and the valve can be opened to temporarily conduct transportation, which improves the plugging speed and also facilitates temporarily transporting the oil inside the pipeline, improving the applicability and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram on one side provided by the embodiment of the present utility model;

[0019] Figure 2Schematic diagram of the bottom view provided by the embodiment of the present utility model;

[0020] Figure 3 Schematic diagram of the external plugging mechanism provided by the embodiment of the present utility model;

[0021] Figure 4 Exploded schematic diagram of the external plugging mechanism provided by the embodiment of the present utility model.

[0022] In the figure: 100 - internal plugging mechanism; 110 - valve; 120 - connection component; 121 - connecting pipe; 122 - upper flange; 200 - external plugging mechanism; 210 - installation component; 211 - lower flange; 212 - installation pipe; 213 - limiting ring; 220 - expansion component; 221 - outer protective airbag; 222 - installation ring; 223 - hose clamp; 224 - internal airbag; 225 - air delivery pipe. Specific embodiments

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the scope of protection of the present utility model.

[0024] Please refer to Figure 1 and Figure 2 , the present utility model provides a technical solution: an oil well downhole plugging device, including an internal plugging mechanism 100, the internal plugging mechanism 100 includes a valve 110 and a connection component 120, and the valve 110 is installed at the end of the connection component 120; an external plugging mechanism 200, the external plugging mechanism 200 includes an installation component 210 and an expansion component 220, the installation component 210 is fixedly connected to the connection component 120, the expansion component 220 is sleeved outside the installation component 210, the expansion component 220 is arranged corresponding to the inner wall of the oil well, and the valve 110 is used to cut off and connect the connection component 120, so as to enable the expansion component 220 and the installation component 210 to quickly plug the pipeline or the well wall.

[0025] When plugging, after the expansion component 220 is inserted into the pipeline or the well, it is also necessary to fix the installation component 210 to prevent the installation component 210 from shifting and causing sealing failure.

[0026] Please refer to Figure 2, the connection component 120 includes a connecting pipe 121. Upper flanges 122 are fixedly and sealingly connected to the top and bottom of the connecting pipe 121 respectively. The upper flanges 122 facilitate the continuous connection of pipes above the connecting pipe 121 for emergencies. The valve 110 is installed at the upper end of the connecting pipe 121, and the valve 110 is set to different models according to needs.

[0027] Please refer to Figures 2 to 4 , the installation component 210 includes a lower flange 211 and an installation pipe 212. The lower flange 211 is fixedly installed on the upper top of the installation pipe 212. The lower flange 211 and the upper flange 122 at the bottom of the connecting pipe 121 are sealingly connected by bolts. A rubber sealing ring is arranged between the upper flange 122 and the lower flange 211. The installation pipe 212 is used to facilitate the installation of the expansion component 220.

[0028] The expansion component 220 includes an outer protective airbag 221 and an inner airbag 224. The inner airbag 224 is sleeved on the installation pipe 212, and the outer protective airbag 221 is sleeved outside the inner airbag 224. Both ends of the outer protective airbag 221 are limit-connected to the installation pipe 212. An air delivery pipe 225 is communicated with the inner airbag 224, and the air delivery pipe 225 is communicated with the outside. The outer protective airbag 221 is used to prevent sharp protrusions at the well wall or the fracture of the pipeline from puncturing the inner airbag 224, thereby increasing the service life of the inner airbag 224 through the outer protective airbag 221. At the same time, the outer protective airbag 221 is convenient for replacement, and the outer protective airbag 221 can be replaced by disassembling the hose clamp 223.

[0029] The air delivery pipe 225 penetrates through the installation pipe 212 on the back of the inner airbag 224 and is communicated with the inner airbag 224. The other end of the air delivery pipe 225 penetrates through the installation pipe 212 above the outer protective airbag 221 and is communicated with the outside. The air delivery pipe 225 is used to inflate the inner airbag 224 to make the outer protective airbag 221 fit seamlessly with the well wall or the outer wall of the pipeline. Installation rings 222 are fixedly connected to the upper and lower ends of the outer protective airbag 221 respectively. Hose clamps 223 are sleeved on the outside of the installation rings 222 respectively. The installation rings 222 are used to make the fixing effect of both ends of the outer protective airbag 221 better. A limit ring 213 is fixedly sleeved on the outer wall of the installation pipe 212 inside the installation ring 222. The installation ring 222 is locked to the outside of the limit ring 213 through the hose clamp 223. The limit ring 213 is used to prevent the installation ring 222 from sliding on the outer wall of the installation pipe 212.

[0030] Working principle: When it is necessary to block the pipeline, open the valve 110 inside the connection component 120, insert the installation component 210 and the expansion component 220 into the pipeline. By quickly inputting gas into the gas transmission pipe 225, the gas expands the internal airbag 224. The internal airbag 224 will expand the external protective airbag 221, and the installation ring 222 blocks the inner wall of the well or the inner wall of the pipeline. After fixing the positions of the internal blocking mechanism 100 and the external blocking mechanism 200, close the valve 110. At the same time, the pipeline can be connected to the other end of the connection component 120, and the valve 110 can be opened for temporary transportation.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil well downhole plugging device, characterized in that, including an internal plugging mechanism, the internal plugging mechanism includes a valve and a connection component, and the valve is installed at the end of the connection component; an external plugging mechanism, the external plugging mechanism includes a mounting component and an expansion component, the mounting component is fixedly connected to the connection component, the expansion component is sleeved outside the mounting component, and the expansion component is arranged corresponding to the inner wall of the oil well.

2. The oil well downhole plugging device according to claim 1, wherein: The connection component includes a connecting pipe, and upper flanges are fixedly and sealingly connected to the top and bottom of the connecting pipe respectively.

3. The downhole plugging device for petroleum according to claim 2, characterized in that: The valve is installed at the upper end of the connecting pipe.

4. The downhole plugging device for petroleum according to claim 2, characterized in that: The mounting component includes a lower flange and a mounting pipe, the lower flange is fixedly installed on the upper top of the mounting pipe, and the lower flange and the upper flange at the bottom of the connecting pipe are sealed and connected by bolts.

5. The downhole oil plugging device according to claim 4, characterized in that: A rubber sealing ring is arranged between the upper flange and the lower flange.

6. The downhole oil plugging device according to claim 4, characterized in that: The expansion component includes an outer protective airbag and an inner airbag, the inner airbag is sleeved on the mounting pipe, the outer protective airbag is sleeved outside the inner airbag, both ends of the outer protective airbag are limit-connected to the mounting pipe, an air delivery pipe is communicated with the inner airbag, and the air delivery pipe is communicated with the outside.

7. The downhole plugging device for oil wells according to claim 6, characterized in that: The air delivery pipe penetrates through the mounting pipe on the back of the inner airbag and is communicated with the inner airbag, and the other end of the air delivery pipe penetrates through the mounting pipe above the outer protective airbag and is communicated with the outside.

8. The downhole plugging device for oil wells according to claim 6, characterized in that: Mounting rings are fixedly connected to the upper and lower ends of the outer protective airbag respectively, and throat collars are respectively sleeved outside the mounting rings in a limited manner.

9. The downhole plugging device for oil wells according to claim 8, wherein: A limit ring is fixedly sleeved on the outer wall of the mounting pipe inside the mounting ring, and the mounting ring is locked to the outside of the limit ring through a throat collar.

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