Container of rubber plug for well cementation

Abstract

The utility model provides a container of a rubber plug for well cementation, and relates to the technical field of oil field drilling, the container comprises a barrel and a top cover, the barrel is provided with an axially through containing cavity, the containing cavity is used for placing the rubber plug for well cementation, the top cover detachably covers one end of the barrel, one end of the containing cavity is sealed by the top cover, and the other end of the containing cavity is provided with a sealing cover. The other end of the containing cavity is in an open state, and a plurality of circulating through holes are formed in the side wall of the barrel. The container of the rubber plug for well cementation can ensure that the rubber plug for well cementation can be released smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field drilling, in particular to a container for a rubber plug for cementing. Background Art

[0002] In the cementing operation of oil wells, cementing plug is an extremely important downhole tool in cementing construction. Cementing plug mainly solves the problems of scraping cement slurry on the inner wall of casing, blocking cement slurry and plugging liquid, and bearing cementing collision pressure.

[0003] During on-site construction, cementing plugs are usually pre-placed in the inner cavity of the cement head and released when needed. When the cement head is used for plug displacement, liquid is injected at the top of the cementing plug. However, due to the small or no gap between the cementing plug and the cement head body, the stopper rod is prone to bending under negative pressure after cementing of large-sized casing, which can lead to cementing accidents. The rest of the time, the plug valve at the top of the cementing plug remains closed, and the top channel of the cementing plug cannot participate in the circulation, nor can it be connected to the top drive for circulation operations.

[0004] In view of this, the inventor has designed a container for cementing plugs based on many years of production design experience in this field and related fields and after repeated experiments, in order to solve the problems existing in the prior art. Utility Model Content

[0005] The utility model aims to provide a container for a cementing plug, which ensures that the cementing plug can be released smoothly.

[0006] In order to achieve the above-mentioned purpose, the utility model proposes a container for cementing plugs, wherein the container includes a cylinder and a top cover, the cylinder has an axially through-going accommodating chamber, the accommodating chamber is used to place the cementing plug, the top cover is detachably covered on one end of the cylinder, one end of the accommodating chamber is closed by the top cover, and the other end of the accommodating chamber is in an open state, and a plurality of circulation through holes are opened on the side wall of the cylinder.

[0007] In the container for the cementing plug as described above, the inner diameter of the cylinder is smaller than the outer diameter of the cementing plug.

[0008] In the container of the cementing plug as described above, the top cover is connected to the barrel through threads.

[0009] In the container of the cementing plug as described above, the outer side wall of the cylinder is provided with a plurality of righting wings, the plurality of righting wings are evenly distributed along the circumference of the cylinder, and a flow guide is formed between two adjacent righting wings.

[0010] In the container of the cementing plug as described above, the other end of the accommodating cavity in the open state is in a trumpet-shaped shape with a gradually expanding diameter.

[0011] In the container of the cementing plug as described above, the plurality of circulation through holes are evenly distributed along the circumference of the cylinder.

[0012] In the container of the cementing plug as described above, the distance between the circulation through hole and the other end of the accommodating cavity in the open state is greater than the length of the cementing plug.

[0013] In the container of the cementing plug as described above, the top cover is provided with a limiting member capable of extending into the accommodating cavity, and the limiting member extends to the position of the circulation through hole.

[0014] In the container of the cementing plug as described above, there is a gap between the limiting member and the inner wall of the cylinder.

[0015] In the container of the cementing plug as described above, the cylinder is a metal cylinder and the top cover is a metal top cover.

[0016] Compared with the prior art, the utility model has the following characteristics and advantages:

[0017] The container for cementing plugs proposed by the utility model is used for storing cementing plugs, which can effectively prevent the cementing plugs from being washed away, thereby protecting the cementing plugs; and because a circulation through hole is provided on the cylinder body, the cylinder body can participate in the circulation operation through the circulation through hole, thereby avoiding the generation of negative pressure at the cementing plugs, ensuring that the cementing plugs can be released smoothly, and avoiding cementing construction risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0019] Figure 1 The present invention is a schematic structural diagram of a container for a cementing plug according to the present invention.

[0020] Description of Reference Numerals

[0021] 100. container; 10. cylinder;

[0022] 11. Accommodating cavity; 12. Circulation through hole;

[0023] 13. Righting wing; 20. Top cover;

[0024] 21. Limiting piece; 200. Rubber plug for cementing; DETAILED DESCRIPTION

[0025] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be considered to belong to the scope of the present invention.

[0026] like Figure 1 As shown, the utility model proposes a container 100 for a cementing plug, the container 100 includes a barrel 10 and a top cover 20, the barrel 10 has an axially through-going accommodating chamber 11, the accommodating chamber 11 is used to place the cementing plug 200, the top cover 20 is detachably covered on one end of the barrel 10, one end of the accommodating chamber 11 is closed by the top cover 20, and the other end of the accommodating chamber 11 is in an open state, and a plurality of circulation through holes 12 are opened on the side wall of the barrel 10.

[0027] The container 100 for cementing plugs proposed in the utility model is used to receive cementing plugs 200, and the cylinder 10 can effectively prevent the cementing plugs 200 from being washed away, thereby protecting the cementing plugs 200. In addition, since the cylinder 10 is provided with a circulation through hole, the cylinder 10 can participate in the circulation operation through the circulation through hole 12, thereby avoiding the generation of negative pressure at the cementing plugs 200, ensuring that the cementing plugs 200 can be released smoothly, and avoiding cementing construction risks.

[0028] In an optional embodiment of the present invention, the inner diameter of the cylinder 10 is smaller than the outer diameter of the cementing plug 200. Preferably, the inner diameter of the cylinder 10 is slightly smaller than the outer diameter of the cementing plug 200, and the cementing plug 200 placed in the accommodating chamber 11 is in a slightly contracted state, ensuring that the cementing plug 200 can be stably arranged in the accommodating chamber 11, and realizing the close protection of the cementing plug 200 by the cylinder 10.

[0029] In an optional embodiment of the present invention, the top cover 20 is connected to the cylinder body 10 via threads to achieve a detachable connection between the top cover and the cylinder body 10, thereby facilitating the assembly and disassembly of the container 100.

[0030] In an optional embodiment of the utility model, a plurality of righting wings 13 are provided on the outer wall of the cylinder 10, and the plurality of righting wings 13 are evenly distributed along the circumference of the cylinder 10, and a guide channel is formed between two adjacent righting wings 13, so as to further avoid the difficulty or failure in releasing the cementing plug 200 caused by the negative pressure formed at the bottom of the cementing plug 200 after the cementing is completed, thereby improving the success rate of releasing the cementing plug 200.

[0031] In an optional embodiment of the present invention, the other end of the accommodating cavity 11 in the open state is in a trumpet-shaped shape with a gradually expanding diameter.

[0032] In an optional embodiment of the present invention, the plurality of circulation through holes 12 are evenly distributed along the circumference of the cylinder 10 .

[0033] In an optional example of this embodiment, the distance between the circulation through hole 12 and the other end of the accommodating chamber 11 in the open state is greater than the length of the cementing plug 200. With the above structure, after the cementing plug 200 is placed in the cylinder 10, the circulation through hole 12 is located above the cementing plug 200, further realizing that the top space of the cementing plug 200 can effectively participate in the circulation operation.

[0034] In an optional example, a limit member 21 capable of extending into the accommodating cavity 11 is provided on the top cover 20, and the limit member 21 extends to the position of the circulation through hole 12. The limit member 21 is used to limit the upward movement of the cementing plug 200 to ensure that there is space on the top of the cementing plug 200 to participate in the circulation operation.

[0035] Preferably, there is a gap between the limiting member 21 and the inner wall of the cylinder 10, so as to further ensure that there is sufficient space at the top of the cementing plug 200 to participate in the circulation operation.

[0036] In an optional embodiment of the present invention, the cylinder 10 is a metal cylinder, and the top cover 20 is a metal top cover.

[0037] Preferably, the cylinder 10 and the top cover 20 are respectively machined from high-strength metal materials.

[0038] Please refer to Figure 1 Now, the installation and operation steps of the container 100 for cementing plug proposed by the utility model are described in detail.

[0039] First, the cementing plug 200 is placed into the accommodating cavity 11 from the top of the cylinder 10 and pushed to the bottom of the cylinder 10;

[0040] Afterwards, the top cover 20 and the barrel 10 are connected by threads to form a container 100 for the cementing plug;

[0041] Finally, the container 100 containing the cementing plug 200 is placed into the cavity of a special cementing head and supported by the stopper pin rod of the cementing head.

[0042] The detailed explanation of the above-mentioned embodiments is only intended to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions cannot be interpreted as limitations on the present invention for any reason. In particular, the various features described in different embodiments may also be arbitrarily combined with each other to form other embodiments. Unless there is a clear description to the contrary, these features should be understood to be applicable to any embodiment and are not limited to the described embodiments.

Claims

1. A container for cementing plugs, characterized in that: The container includes a cylinder and a top cover. The cylinder has an axially through-going accommodating cavity for placing a cementing plug. The top cover is detachably covered on one end of the cylinder. One end of the accommodating cavity is closed by the top cover, and the other end of the accommodating cavity is in an open state. A plurality of circulation through holes are opened on the side wall of the cylinder.

2. The container for cementing plug according to claim 1, characterized in that: The inner diameter of the cylinder is smaller than the outer diameter of the cementing rubber plug.

3. The container for cementing plug according to claim 1, characterized in that: The top cover is connected to the cylinder through threads.

4. The container for cementing plug according to claim 1, characterized in that: The outer side wall of the cylinder is provided with a plurality of righting wings, the plurality of righting wings are evenly distributed along the circumference of the cylinder, and a flow guide is formed between two adjacent righting wings.

5. The container for cementing plug according to claim 1, characterized in that: The other end of the accommodating cavity in the open state is in a gradually expanding trumpet shape.

6. The container for cementing plug according to claim 1, characterized in that: The plurality of circulation through holes are evenly distributed along the circumference of the cylinder.

7. The container for cementing plug according to claim 6, characterized in that: The distance between the circulation through hole and the other end of the accommodating cavity in the open state is greater than the length of the cementing rubber plug.

8. The container for cementing plug according to claim 7, characterized in that: The top cover is provided with a limiting member capable of extending into the accommodating cavity, and the limiting member extends to the position of the circulation through hole.

9. The container for cementing plug according to claim 8, characterized in that: There is a gap between the limiting member and the inner wall of the cylinder.

10. The container for cementing plug according to claim 1, characterized in that: The cylinder is a metal cylinder, and the top cover is a metal top cover.

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