Coiled tubing with anti-explosion function

Abstract

The utility model relates to the technical field of coiled tubing, and discloses a coiled tubing with an explosion-proof function, which comprises a coiled tubing main body, a wellhead device main body is arranged above the coiled tubing main body, and a protection box is fixed at the joint of the coiled tubing main body and the wellhead device main body. The pressure inside the protection box is detected through the pressure meter, and when the pressure inside the protection box is high, the sealing block is opened by controlling the electronic valve, so that the pressure inside the protection box is discharged into the pressure relief box in time, and the problems that the connecting part of the coiled tubing and the wellhead device is usually exposed outside, and when the pressure inside the coiled tubing is too high, the pressure inside the wellhead device is too high are solved. The problems that in the prior art, the high pressure cannot be relieved in time, then the explosion risk is caused, meanwhile, the environment of an oil exploitation site is complex, some sundries are likely to damage the coiled tubing, and therefore the risk that the coiled tubing bursts is increased are solved.

Description

Technical Field

[0001] The utility model application relates to the technical field of continuous oil pipes, in particular to a continuous oil pipe with explosion-proof function. Background Art

[0002] Coiled tubing is a pipe made of low-carbon alloy steel with excellent flexibility. It is also called flexible tubing. A roll of coiled tubing is several thousand meters long and can replace conventional tubing for many operations. Coiled tubing operation equipment has the characteristics of pressure operation and continuous lifting and lowering. The equipment is small in size, has a fast operation cycle and low cost.

[0003] The part where the coiled tubing connects to the wellhead is usually exposed. When the pressure inside the coiled tubing is too high, it is often impossible to relieve the high pressure in time, which may cause the risk of explosion. At the same time, the environment of the oil production site is relatively complex, and it is easy for some debris to damage the coiled tubing, thereby increasing the risk of the coiled tubing bursting. Summary of the Invention

[0004] In order to solve the problem that the part connecting the coiled tubing and the wellhead device is usually exposed to the outside, when the pressure inside the coiled tubing is too high, the high pressure often cannot be relieved in time, which may cause the risk of explosion. At the same time, the environment of the oil production site is relatively complex, and some debris may easily damage the coiled tubing, thereby increasing the risk of the coiled tubing bursting. The utility model provides a coiled tubing with explosion-proof function to solve the above problems.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A coiled tubing with explosion-proof function comprises a coiled tubing body, a wellhead device body is arranged above the coiled tubing body, a protection box is provided at one end of the coiled tubing body close to the wellhead device body, the coiled tubing body is fixed inside the protection box, a pressure gauge is provided on one side of the protection box, a connecting pipe is connected to the side of the protection box close to the pressure gauge, and a pressure relief box is connected to the end of the connecting pipe away from the pressure gauge, a sealing block is rotatably connected to the inside of the connecting pipe, an electronic valve is provided at the top of the sealing block, and the electronic valve is fixed to the outer side of the connecting pipe.

[0007] Furthermore, a gas detector is provided inside the protection box, a cylinder is fixed on the outside of the protection box away from the connecting pipe, a second sealing tube is fixed on the output end of the cylinder extending to the inside of the protection box, and a first sealing tube is fixed inside the protection box.

[0008] Furthermore, the pressure relief box is provided with two pressure relief ports at one end away from the pressure gauge, and dustproof nets are provided at the pressure relief ports.

[0009] Furthermore, the outer side surface of the sealing block is in contact with the inner wall of the connecting pipe, and a sealing rubber ring is provided on the outer side surface of the sealing block.

[0010] Furthermore, the cylinder is located in the middle of the side of the protection box, the height of the second sealing tube is equal to the height inside the protection box, and the height of the second sealing tube is the same as that of the first sealing tube.

[0011] Furthermore, the second sealing tube and the first sealing tube are respectively located on both sides of the coiled tubing body, and a sealing gasket is provided at the engaging portion between the first sealing tube and the second sealing tube.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. In the present invention, a protection box is fixed at the interface between the coiled tubing body and the wellhead device body, and the pressure inside the protection box is detected by a pressure gauge. When the pressure inside the protection box is high, the electronic valve is controlled to open the sealing block, so that the pressure inside the protection box is promptly discharged into the pressure relief box. This solves the problem that the part connecting the coiled tubing and the wellhead device is usually exposed to the outside. When the pressure inside the coiled tubing is too high, the high pressure cannot be relieved in time, which may cause the risk of explosion. At the same time, the environment of the oil production site is relatively complex, and some debris may easily damage the coiled tubing, thereby increasing the risk of the coiled tubing bursting.

[0014] 2. In the present invention, a gas detector is provided inside the protective box to detect the air quality inside the protective box. When dangerous gas overflows from the protective box, the second sealing tube is pushed toward the first sealing tube by the cylinder, so that the second sealing tube and the first sealing tube are engaged and sealed, so that the coiled tubing body is wrapped inside by the second sealing tube and the first sealing tube, thereby ensuring the sealing of the coiled tubing body and avoiding the risk of explosion of the dangerous gas inside the protective box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 is a schematic diagram of a three-dimensional structure according to an embodiment of the present application;

[0017] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure in the embodiment shown;

[0018] Figure 3 yes Figure 1 A three-dimensional schematic diagram of the structure after opening in the embodiment shown;

[0019] Figure 4 yes Figure 1 Schematic diagram of the three-dimensional structure of the local A structure in the embodiment shown.

[0020] The meanings of the reference numerals in the figure are as follows: 1. Coiled tubing body; 2. Wellhead assembly body; 3. Protection box; 4. Pressure gauge; 5. Connecting pipe; 6. Sealing block; 7. Electronic valve; 8. Pressure relief box; 9. Dust screen; 10. Gas detector; 11. First sealing pipe; 12. Second sealing pipe; 13. Cylinder; 14. Sealing gasket. DETAILED DESCRIPTION

[0021] In order to make the purpose, features, and advantages of this application more obvious and easy to understand, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described below are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 A coiled tubing with explosion-proof function includes a coiled tubing body 1, a wellhead device body 2 is arranged above the coiled tubing body 1, a protection box 3 is provided at one end of the coiled tubing body 1 close to the wellhead device body 2, the coiled tubing body 1 is fixed inside the protection box 3, a pressure gauge 4 is provided on one side of the protection box 3, a connecting pipe 5 is connected to the side of the protection box 3 close to the pressure gauge 4, and the end of the connecting pipe 5 away from the pressure gauge 4 is connected to a pressure relief box 8, a sealing block 6 is rotatably connected inside the connecting pipe 5, and an electronic valve 7 is provided at the top of the sealing block 6. The electronic valve 7 is fixed to the outer side of the connecting pipe 5, so that the pressure leaking from the coiled tubing body 1 can be discharged from the pressure relief box 8.

[0023] Specifically, the pressure relief box 8 has two pressure relief ports at one end away from the pressure gauge 4, and a dustproof net 9 is provided at the pressure relief port. The outer side surface of the sealing block 6 is in contact with the inner wall of the connecting pipe 5, and a sealing rubber ring is provided on the outer side surface of the sealing block 6 to ensure the sealing of the connecting pipe 5.

[0024] As an optimization solution, Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, a gas detector 10 is provided inside the protection box 3, and a cylinder 13 is fixed on the outside of the protection box 3 away from the connecting pipe 5. The output end of the cylinder 13 extends to the inside of the protection box 3 where a second sealing tube 12 is fixed. A first sealing tube 11 is fixed inside the protection box 3 to prevent the dangerous gas from being released from the coiled tubing body 1 and causing an explosion.

[0025] Specifically, the cylinder 13 is located in the middle of the side of the protection box 3, the height of the second sealing tube 12 is equal to the height inside the protection box 3, the second sealing tube 12 is the same as the height of the first sealing tube 11, and the second sealing tube 12 and the first sealing tube 11 are respectively located on both sides of the coiled tubing body 1. A sealing gasket 14 is provided at the engagement between the first sealing tube 11 and the second sealing tube 12 to ensure the sealing of the first sealing tube 11 and the second sealing tube 12.

[0026] Working principle: When the pressure inside the coiled tubing body 1 is high, the pressure overflows into the protection box 3, causing the pressure gauge 4 to detect the high pressure inside the protection box 3, thereby causing the pressure gauge 4 to control the electronic valve 7 to open, and the electronic valve 7 to control the sealing block 6 to open. At this time, the pressure inside the protection box 3 is discharged into the pressure relief box 8 through the connecting pipe 5. When the pressure inside the protection box 3 returns to stability, the electronic valve 7 controls the sealing block 6 to seal the connecting pipe 5, thereby maintaining the pressure inside the coiled tubing body 1 and the protection box 3. At the same time, the dustproof net 9 prevents dangerous substances in the environment from flowing back into the protection box 3. When dangerous gas from the coiled tubing body 1 or the outside leaks into the protection box 3, the gas detector 10 detects the dangerous gas and controls the cylinder 13 to push the second sealing tube 12 toward the first sealing tube 11, so that the second sealing tube 12 is engaged and fixed with the first sealing tube 11, thereby sealing and isolating the coiled tubing body 1 and the protection box 3.

[0027] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and scope of the appended claims are intended to be included herein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0028] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A coiled tubing with explosion-proof function, comprising a coiled tubing body (1), a wellhead device body (2) being arranged above the coiled tubing body (1), and characterized in that: A protection box (3) is provided at one end of the continuous tubing body (1) close to the wellhead device body (2), and the continuous tubing body (1) is fixed inside the protection box (3). A pressure gauge (4) is provided on one side of the protection box (3). A connecting pipe (5) is connected to the side of the protection box (3) close to the pressure gauge (4), and a pressure relief box (8) is connected to the end of the connecting pipe (5) away from the pressure gauge (4). A sealing block (6) is rotatably connected inside the connecting pipe (5), and an electronic valve (7) is provided at the top end of the sealing block (6). The electronic valve (7) is fixed to the outer side of the connecting pipe (5).

2. The explosion-proof coiled tubing according to claim 1, characterized in that: A gas detector (10) is provided inside the protection box (3); a cylinder (13) is fixed on the side of the outside of the protection box (3) away from the connecting pipe (5); an output end of the cylinder (13) extends to the inside of the protection box (3) where a second sealing tube (12) is fixed; and a first sealing tube (11) is fixed inside the protection box (3).

3. The explosion-proof coiled tubing according to claim 1, characterized in that: The pressure relief box (8) is provided with two pressure relief ports at one end away from the pressure gauge (4), and a dustproof net (9) is provided at the pressure relief ports.

4. The explosion-proof coiled tubing according to claim 1, characterized in that: The outer side surface of the sealing block (6) is in contact with the inner wall of the connecting pipe (5), and a sealing rubber ring is provided on the outer side surface of the sealing block (6).

5. The explosion-proof coiled tubing according to claim 2, characterized in that: The cylinder (13) is located in the middle of the side of the protection box (3), the height of the second sealing tube (12) is equal to the height inside the protection box (3), and the height of the second sealing tube (12) is the same as that of the first sealing tube (11).

6. The explosion-proof coiled tubing according to claim 2, characterized in that: The second sealing tube (12) and the first sealing tube (11) are respectively located on both sides of the coiled tubing body (1), and a sealing gasket (14) is provided at the engaging portion between the first sealing tube (11) and the second sealing tube (12).

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