Wellhead optical cable blowout prevention valve

Abstract

The utility model discloses a wellhead optical cable blowout prevention valve, and relates to a wellhead. And the configuration technology field. The wellhead optical cable blowout prevention valve comprises a blowout prevention cabin base, a shell is welded to the blowout prevention cabin base, an underground optical cable penetrates through the blowout prevention cabin base and is welded, coiled, fixed and protected with a wellhead optical cable in the shell, optical cables are arranged in the blowout prevention cabin base, and the same optical cables are arranged in the shell; the sealing assembly is arranged on the shell, the sealing assembly comprises a fluorine rubber plug, a brass gasket, a plurality of fluorine rubber sealing rings I, a spring chuck, a locking nut, a plurality of fluorine rubber sealing rings II, a plurality of limiting rings and a fluorine rubber sealing ring III, and the shell, the optical cable and the blowout prevention cabin base are sealed by the sealing assembly in a multi-stage sealing mode; a plurality of sealing structures are adopted, airtightness is guaranteed, the whole body is made of 316L stainless steel, rusting is prevented, strength is improved, the pressure resistance can reach 70 MPa or above, and the optical fiber is plated with gold and welded to the sealing joint.

Description

Technical Field

[0001] The utility model relates to a wellhead and the technical field of its configuration, in particular to a wellhead optical cable blowout prevention valve. Background Art

[0002] The existing wellhead crossing system uses a carrot head (hanger) and an oil production tree to fix the wellhead cable, and uses a three-petal rubber plug for sealing. It can only play a sealing role and has low pressure resistance. If a sudden situation occurs at the wellhead and a blowout occurs, the internal pressure is too high and the carrot head (hanger) will be exposed and damaged, which can easily cause danger. Moreover, the carrot head three-petal sealing plug is only suitable for sealing large flat cables and can only ensure external airtightness. If an optical cable is used to collect signals and the optical cable ruptures inside, the pressure outside the well will erupt and cause an accident. Utility Model Content

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a wellhead optical cable blowout preventer, which can solve the problem that the three-petal sealing plug is only suitable for sealing large flat cables and can only ensure external airtightness. If an optical cable is used to collect signals and the inside of the optical cable is broken, the pressure outside the well will erupt completely and cause an accident.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wellhead optical cable blowout preventer valve, comprising a blowout preventer cabin base, a shell is welded on the blowout preventer cabin base, an optical cable passes through the blowout preventer cabin base, is welded with the optical cable inside the shell, and is coiled and fixed for protection;

[0005] The sealing assembly is arranged on the shell, and the sealing assembly includes a fluororubber plug, a brass gasket, multiple fluororubber sealing rings 1, a spring collet, a locking nut, multiple fluororubber sealing rings 2, multiple limit rings, and a fluororubber sealing ring 3. The fluororubber plug is stuck in the inside of the shell, and the fluororubber plug is sleeved on the outside of the optical cable.

[0006] Preferably, the brass gasket is sleeved on the optical cable, and the surface of the optical cable is fixed to the inside of the housing.

[0007] Preferably, one ends of the plurality of fluororubber sealing rings are fixedly connected to the housing, and the other ends of the plurality of fluororubber sealing rings are in contact with the locking nut.

[0008] Preferably, one side of the locking nut is clamped on the housing, and the other side of the locking nut is clamped on the spring clamp.

[0009] Preferably, the spring chuck is sleeved on the optical cable, and a plurality of fluororubber sealing rings are sleeved on the optical cable.

[0010] Preferably, the surfaces of the plurality of fluororubber sealing rings 2 are all stuck inside the housing, and the plurality of limiting rings are all sleeved on the optical cable.

[0011] Preferably, the surfaces of the plurality of limiting rings are all stuck inside the housing, and the surfaces of the plurality of limiting rings are in close contact with the corresponding fluororubber sealing rings 2 respectively.

[0012] Preferably, a fluororubber sealing ring 3 is fixedly provided inside the blowout-preventing cabin base, and a pressure gauge is installed on the surface of the blowout-preventing cabin base.

[0013] Preferably, a first pressure measuring hole is opened on the surface of the blowout preventer base, a second pressure measuring hole is opened on the surface of the blowout preventer base, and a third pressure measuring hole is opened on the surface of the shell.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The wellhead optical cable blowout preventer is provided with a sealing assembly. The sealing assembly adopts a multi-stage sealing form to seal the housing, optical cable and blowout preventer base, that is, multiple sealing structures are adopted to ensure airtightness. The whole is made of 316L stainless steel to prevent rust and increase strength. The pressure resistance can reach more than 70MPa. The optical fiber is gold-plated and welded to the sealing joint. The whole adopts threaded connection and welding technology to eliminate adhesive and avoid the possibility of damage in extreme environments.

[0016] (2) The wellhead optical cable blowout preventer is provided with a spring chuck which fixes the optical cable inside the shell. A fluororubber plug is provided which can improve the sealing performance between the shell and the blowout preventer base while fixing the optical cable. At the same time, a fluororubber sealing ring 2 and a limit ring are provided on the top of the shell and are alternately sleeved on the optical cable, so that the fluororubber sealing ring 2 and the limit ring block the gap between the optical cable and the shell, thereby ensuring the sealing performance between the shell and the optical cable.

[0017] (3) When the air pressure in the well needs to be tested, the optical cable blowout preventer valve at the wellhead cannot be tested directly. By installing a pressure gauge on the base of the blowout preventer, the pressure gauge can monitor the changes in the pressure value inside the base of the blowout preventer at all times, and judge whether there is a leakage problem at the bottom of the well by the pressure display number, thereby improving safety.

[0018] (4) When installing the wellhead optical cable blowout preventer, if the airtightness is poor during the installation process, the sealing performance of the blowout preventer after final installation will be poor. In order to facilitate the detection of the internal airtightness when installing the blowout preventer, pressure measuring holes 1, 2 and 3 are provided to facilitate the detection of the internal pressure when installing the blowout preventer, thereby ensuring the airtightness of the installation process, that is, ensuring the final installation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the structure of the blowout prevention valve of the utility model from the main view;

[0021] Figure 2 This is a schematic diagram of the connection between the housing and the optical cable of the utility model;

[0022] Figure 3 For this utility model Figure 2 The enlarged schematic diagram at A in the middle;

[0023] Figure 4 It is a schematic diagram of the relationship between the three positions of the blowout prevention cabin base and the fluororubber sealing ring of the utility model.

[0024] Figure numerals: 1. pressure measuring hole one; 2. pressure gauge; 3. pressure measuring hole two; 4. pressure measuring hole three; 5. shell; 6. fluororubber plug; 7. brass washer; 8. fluororubber sealing ring one; 9. spring chuck; 10. locking nut; 11. optical cable; 12. fluororubber sealing ring two; 13. limiting ring; 14. blowout preventer base; 15. fluororubber sealing ring three. DETAILED DESCRIPTION

[0025] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] See also Figure 1-4The utility model provides a technical solution: a wellhead optical cable blowout preventer valve, comprising a blowout preventer base 14, a shell 5 is welded on the blowout preventer base 14, an optical cable 11 passes through the blowout preventer base 14, and is welded with the optical cable 11 inside the shell 5, and is coiled and fixed for protection;

[0030] The sealing assembly is arranged on the housing 5, and the sealing assembly includes a fluororubber plug 6, a brass gasket 7, multiple fluororubber sealing rings 1 8, a spring collet 9, a locking nut 10, multiple fluororubber sealing rings 2 12, multiple limit rings 13, and a fluororubber sealing ring 3 15. The fluororubber plug 6 is stuck in the interior of the housing 5, and the fluororubber plug 6 is sleeved on the outside of the optical cable 11.

[0031] The brass washer 7 is sleeved on the optical cable 11 , and the surface of the optical cable 11 is fixed to the inside of the housing 5 .

[0032] One ends of the plurality of fluororubber sealing rings 8 are fixedly connected to the housing 5 , and the other ends of the plurality of fluororubber sealing rings 8 are in contact with the locking nut 10 .

[0033] One side of the lock nut 10 is clamped on the housing 5 , and the other side of the lock nut 10 is clamped on the spring clamp 9 .

[0034] The spring clamp 9 is sleeved on the optical cable 11 , and a plurality of fluororubber sealing rings 12 are sleeved on the optical cable 11 .

[0035] The surfaces of the plurality of fluororubber sealing rings 12 are all stuck in the interior of the housing 5 , and the plurality of limiting rings 13 are all sleeved on the optical cable 11 .

[0036] The surfaces of the plurality of limiting rings 13 are all stuck in the interior of the housing 5 , and the surfaces of the plurality of limiting rings 13 are in close contact with the corresponding fluororubber sealing rings 12 .

[0037] A fluororubber sealing ring 3 15 is fixedly arranged inside the blowout prevention chamber base 14 , and a pressure gauge 2 is installed on the surface of the blowout prevention chamber base 14 .

[0038] A pressure measuring hole 1 is provided on the surface of the blowout prevention chamber base 14 , a pressure measuring hole 2 3 is provided on the surface of the blowout prevention chamber base 14 , and a pressure measuring hole 3 4 is provided on the surface of the shell 5 .

[0039] The optical cable 11 is fixed inside the housing 5 by means of a spring clamp 9 , and the fluororubber plug 6 is provided, which can improve the sealing performance between the housing 5 and the blowout prevention chamber base 14 while fixing the optical cable 11 .

[0040] A fluororubber sealing ring 12 and a limiting ring 13 are arranged on the top of the housing 5 and are alternately sleeved on the optical cable 11 , so that the fluororubber sealing ring 12 and the limiting ring 13 block the gap between the optical cable 11 and the housing 5 to ensure the sealing of the housing 5 and the optical cable 11 .

[0041] A pressure gauge 2 is installed on the blowout preventer base 14. The pressure gauge 2 can monitor the change of the pressure value inside the blowout preventer base 14 at all times, and determine whether there is a leakage problem at the bottom of the well according to the reading of the pressure gauge 2.

[0042] By providing the pressure measuring hole 1, the pressure measuring hole 3 and the pressure measuring hole 4, it is convenient to detect the internal pressure when installing the blowout preventer, thereby ensuring the air tightness of the installation process.

[0043] The optical cable 11 outside the well is sealed by welding the sealing joint to ensure the air tightness of the optical fiber.

[0044] The utility model is a protection detection device for preventing the danger of blowout. No matter the blowout occurs inside the optical cable or outside the optical cable, the pressure will be limited inside the blowout preventer valve to protect the safety of personnel.

[0045] By setting up a sealing component, the sealing component adopts a multi-stage sealing form to seal the housing 5, the optical cable 11 and the blowout-proof cabin base 14, that is, multiple sealing structures are adopted to ensure airtightness. The whole is made of 316L stainless steel to prevent rust and increase strength. The pressure resistance can reach more than 70MPa. The optical cable 11 is gold-plated and welded to the sealing joint. The whole adopts threaded connection and welding technology to eliminate adhesive and avoid the possibility of damage in extreme environments.

[0046] By setting the spring chuck 9, the spring chuck 9 fixes the optical cable 11 inside the shell 5, and by setting the fluororubber plug 6, the fluororubber plug 6 can improve the sealing performance between the shell 5 and the blowout-proof cabin base 14 while fixing the optical cable 11. At the same time, a fluororubber sealing ring 12 and a limiting ring 13 are arranged on the top of the shell 5 and are alternately sleeved on the optical cable 11, so that the fluororubber sealing ring 12 and the limiting ring 13 block the gap between the optical cable 11 and the shell 5, thereby ensuring the sealing performance of the shell 5 and the optical cable 11.

[0047] When it is necessary to detect the air pressure in the well, it is impossible to detect it directly. By installing a pressure gauge 2 on the blowout preventer base 14, the pressure gauge 2 can monitor the changes in the pressure value inside the blowout preventer base 14 at all times. The reading of the pressure gauge 2 can be used to determine whether there is a leakage problem at the bottom of the well, thereby improving safety.

[0048] During installation, if the airtightness is poor during the installation process, the sealing performance of the blowout preventer after final installation will be poor. In order to facilitate the detection of the internal airtightness when installing the blowout preventer, by setting pressure measuring holes 1, 3 and 4, it is convenient to detect the internal pressure when installing the blowout preventer, thereby ensuring the airtightness of the installation process, that is, ensuring the final installation quality.

[0049] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A wellhead optical cable blowout preventer, characterized in that: include: A blowout prevention cabin base (14), a shell (5) is welded on the blowout prevention cabin base (14), the optical cable (11) passes through the blowout prevention cabin base (14), is welded to the optical cable (11) inside the shell (5), and is coiled and fixed for protection; The sealing assembly is arranged on the housing (5), and comprises a fluororubber plug (6), a brass gasket (7), a plurality of fluororubber sealing rings (8), a spring chuck (9), a locking nut (10), a plurality of fluororubber sealing rings (12), a plurality of limiting rings (13), and a fluororubber sealing ring (15). The fluororubber plug (6) is stuck inside the housing (5), and the fluororubber plug (6) is sleeved on the outside of the optical cable (11).

2. A wellhead optical cable blowout preventer according to claim 1, characterized in that: The brass gasket (7) is sleeved on the optical cable (11), and the surface of the optical cable (11) is fixed to the inside of the housing (5).

3. A wellhead optical cable blowout preventer according to claim 1, characterized in that: One end of each of the plurality of fluororubber sealing rings (8) is fixedly connected to the housing (5), and the other end of each of the plurality of fluororubber sealing rings (8) is in contact with the locking nut (10).

4. A wellhead optical cable blowout preventer according to claim 1, characterized in that: One side of the locking nut (10) is clamped on the housing (5), and the other side of the locking nut (10) is clamped on the spring clamp (9).

5. The wellhead optical cable blowout preventer according to claim 1, characterized in that: The spring clamp (9) is sleeved on the optical cable (11), and a plurality of fluororubber sealing rings (12) are sleeved on the optical cable (11).

6. A wellhead optical cable blowout preventer according to claim 1, characterized in that: The surfaces of the plurality of fluororubber sealing rings (12) are all stuck inside the housing (5), and the plurality of limiting rings (13) are all sleeved on the optical cable (11).

7. The wellhead optical cable blowout preventer according to claim 1, characterized in that: The surfaces of the plurality of limiting rings (13) are all stuck inside the housing (5), and the surfaces of the plurality of limiting rings (13) are in close contact with the corresponding fluororubber sealing rings (12) respectively.

8. The wellhead optical cable blowout preventer according to claim 1, characterized in that: A fluororubber sealing ring 3 (15) is fixedly arranged inside the anti-blowout cabin base (14), and a pressure gauge (2) is installed on the surface of the anti-blowout cabin base (14).

9. The wellhead optical cable blowout preventer according to claim 1, characterized in that: The surface of the blowout prevention cabin base (14) is provided with a first pressure measuring hole (1), the surface of the blowout prevention cabin base (14) is provided with a second pressure measuring hole (3), and the surface of the shell (5) is provided with a third pressure measuring hole (4).

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