Pipeline isolation and replacement device for oil and gas places

Abstract

The utility model belongs to the technical field of oil and gas pipelines, and relates to a pipeline isolation and replacement device for oil and gas places. Comprising a grease filling disc, the grease filling disc is matched with the side wall of a pipeline to be used for bearing grease and water, the grease filling disc is matched with the grease and the water to achieve pipeline sealing and water seal isolation, flammable, explosive and poisonous gas in the pipeline is prevented from leaking, and operation safety is improved. A plurality of telescopic handles are fixedly arranged on the grease filling disc, the telescopic handles are used for fixing the grease filling disc in the pipeline, the grease filling disc can be conveniently placed into the pipeline and taken out of the pipeline, meanwhile, due to the fact that the length of the telescopic handles is adjustable, it can be guaranteed that the grease filling disc is located below a fire operation position, and operation safety is improved. A nitrogen introduction pipeline is arranged on the butter filling disc in a penetrating mode, flame-retardant gas such as nitrogen is continuously introduced into the pipeline through the nitrogen introduction pipeline, and replacement of gas in the pipeline is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil and gas pipelines, and relates to a pipeline isolation and replacement device used in oil and gas sites. Background Art

[0002] During pipeline operations in oil and gas sites, the pipeline may contain toxic gases such as CH4 and H2S. During the operation, it may involve high-risk operations such as opening the pipeline or cutting on the pipeline. The operating pipeline section must be energy isolated to prevent accidents caused by the transfer or release of dangerous energy and materials. In the oil and gas system, the CH4 in the pipeline must be replaced with nitrogen in the operating pipeline. The purpose is to prevent the mixture of oil and gas and air from causing explosions. The replacement standard is to detect oxygen content analysis at the exhaust port ≤2.0% (volume) and combustible gas content ≤5% (LEL) to be qualified. The nitrogen pressure during the replacement process is ≤0.5MPa. The next stage of work can be carried out after the oxygen content analysis is qualified. However, it is often the case that some pipe sections can be replaced with nitrogen, but the existing on-site processes cannot be effectively isolated, or the on-site pipeline can be effectively isolated but gas replacement cannot be carried out. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a pipeline isolation and replacement device for oil and gas sites. The utility model can achieve the replacement of gas inside the pipeline during hot work operations and achieve sealed isolation of the pipeline at the same time.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a pipeline isolation and replacement device for oil and gas sites, comprising a butter filling tray, a plurality of telescopic handles are fixedly arranged on the butter filling tray, and a nitrogen inlet pipeline is penetrated through the butter filling tray.

[0006] Furthermore, the butter filling tray and the nitrogen inlet pipe are detachably connected.

[0007] Furthermore, the detachable movable connection includes a threaded connection, a pin connection, a snap connection and a key connection.

[0008] Furthermore, the nitrogen inlet pipe is located at the axis of the butter filling plate.

[0009] Furthermore, a vent valve is provided on the nitrogen inlet pipeline.

[0010] Furthermore, the telescopic handle is symmetrically arranged about the axis of the butter filling tray.

[0011] Furthermore, the telescopic handle comprises a telescopic rod, the telescopic rod is fixedly connected to the butter filling tray, and a hanging part is provided on the telescopic rod.

[0012] Furthermore, the butter filling tray is a filling tray with a variable diameter.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model includes a butter filling tray, which cooperates with the side wall of the pipeline to carry butter and water. The butter filling tray cooperates with butter and water to achieve pipeline sealing, achieve water seal isolation, avoid leakage of flammable, explosive and toxic gases inside the pipeline, and improve operation safety. A plurality of telescopic handles are fixedly provided on the butter filling tray, and the telescopic handles are used to fix the butter filling tray inside the pipeline, which is convenient for placing and removing the butter filling tray into the pipeline. At the same time, since the length of the telescopic handles is adjustable, the butter filling tray can be ensured to be located below the hot work position, thereby improving operation safety. A nitrogen inlet pipe is provided on the butter filling tray, and nitrogen and other flame-retardant gases are continuously introduced into the pipeline through the nitrogen inlet pipe to achieve replacement of gas inside the pipeline. That is, the utility model can achieve replacement of gas inside the pipeline of hot work, and at the same time achieve sealing isolation of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a specific application schematic diagram of the utility model.

[0017] Among them: 1. Butter filling tray; 2. Nitrogen inlet pipe; 3. Telescopic handle; 4. Water; 5. Hot work position. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] The utility model is further described in detail below with reference to the accompanying drawings:

[0021] See also Figure 1 The utility model discloses a pipeline isolation and replacement device for oil and gas sites, including a butter filling tray 1. The butter filling tray 1 cooperates with the side wall of the pipeline to carry butter and water. The butter filling tray 1 cooperates with butter and water to achieve pipeline sealing, achieve water seal isolation, avoid leakage of flammable, explosive and toxic gases inside the pipeline, and improve operation safety. A plurality of telescopic handles 3 are fixedly arranged on the butter filling tray 1. The telescopic handles 3 are used to fix the butter filling tray 1 inside the pipeline, which is conducive to placing and removing the butter filling tray 1 into the pipeline. At the same time, since the length of the telescopic handles 3 is adjustable, the butter filling tray 1 can be ensured to be located below the hot work position 5, thereby improving operation safety. A nitrogen inlet pipe 2 is penetrated on the butter filling tray 1. The nitrogen inlet pipe 2 is used to continuously introduce nitrogen and other flame-retardant gases into the pipeline to achieve replacement of the gas inside the pipeline, achieve the sealing of the pipeline and perform uninterrupted nitrogen purging, thereby achieving effective isolation during high-risk operations such as pipeline opening and hot work. That is, the utility model can achieve the replacement of gas inside the pipeline of hot work, and at the same time achieve the sealing isolation of the pipeline, and has the advantages of simple structure, convenient manufacturing, low cost, reusability, safety, and suitability for various pipe diameters. The utility model can be widely used in various non-valve-cutoff process pipe section energy isolation.

[0022] See also Figure 1 In another feasible embodiment of the utility model, the following is adaptively modified according to the situation. It includes a butter filling tray 1, a plurality of telescopic handles 3 are fixedly arranged on the butter filling tray 1, and a nitrogen inlet pipe 2 is passed through the butter filling tray 1.

[0023] For specific work, see Figure 2, adjust the length of the telescopic handle 3 according to the hot work position 5, pass the nitrogen inlet pipe 2 through the butter filling tray 1, and place the butter filling tray 1 into the hot work pipe through the telescopic handle 3 to ensure that the butter filling tray 1 is located below the hot work position 5. The butter filling tray 1 cooperates with the side wall of the pipe to carry butter and water 4. The butter filling tray 1 cooperates with butter and water to achieve pipe sealing, achieve water seal isolation, avoid leakage of flammable, explosive and toxic gases inside the pipe, and improve operation safety. Pour butter onto the butter filling tray 1, and then add water 4 above the butter to ensure that the water surface does not exceed the fire operation position to achieve pipe sealing. Finally, nitrogen is continuously introduced into the pipe through the nitrogen inlet pipe 2 to achieve gas replacement inside the pipe. The utility model can achieve gas replacement inside the hot work pipe, and at the same time achieve sealing isolation of the pipe to ensure operation safety.

[0024] Embodiment 1:

[0025] See also Figure 1 The present embodiment discloses a pipeline isolation and replacement device for oil and gas sites, including a butter filling tray 1, on which a plurality of telescopic handles 3 are fixedly provided, and a nitrogen inlet pipe 2 is passed through the butter filling tray 1.

[0026] The butter filling plate 1 is detachably connected to the nitrogen inlet pipe 2. For sewage pipes with different pipe diameters, the butter filling plates 1 with different radii can be replaced, thereby improving the versatility of the device.

[0027] Embodiment 2:

[0028] See also Figure 1 The present embodiment discloses a pipeline isolation and replacement device for oil and gas sites, including a butter filling tray 1, on which a plurality of telescopic handles 3 are fixedly provided, and a nitrogen inlet pipe 2 is passed through the butter filling tray 1.

[0029] The detachable movable connection includes threaded connection, pin connection, snap connection and key connection.

[0030] Embodiment three:

[0031] See also Figure 1 The present embodiment discloses a pipeline isolation and replacement device for oil and gas sites, including a butter filling tray 1, on which a plurality of telescopic handles 3 are fixedly provided, and a nitrogen inlet pipe 2 is passed through the butter filling tray 1.

[0032] Preferably, the nitrogen inlet pipe 2 is located at the axis of the butter filling pan 1, and the specific position of the nitrogen inlet pipe 2 on the butter filling pan 1 can be adjusted according to actual conditions.

[0033] Embodiment 4:

[0034] See also Figure 1 The present embodiment discloses a pipeline isolation and replacement device for oil and gas sites, including a butter filling tray 1, on which a plurality of telescopic handles 3 are fixedly provided, and a nitrogen inlet pipe 2 is passed through the butter filling tray 1.

[0035] A vent valve is provided on the nitrogen inlet pipeline 2. The vent valve is used to adjust the amount of nitrogen introduced into the pipeline.

[0036] Embodiment five:

[0037] See also Figure 1 The present embodiment discloses a pipeline isolation and replacement device for oil and gas sites, including a butter filling tray 1, on which a plurality of telescopic handles 3 are fixedly provided, and a nitrogen inlet pipe 2 is passed through the butter filling tray 1.

[0038] The telescopic handle 3 is symmetrically arranged about the axis of the butter filling tray 1 to improve the stability of the butter filling tray 1 .

[0039] Embodiment six:

[0040] See also Figure 1 The present embodiment discloses a pipeline isolation and replacement device for oil and gas sites, including a butter filling tray 1, on which a plurality of telescopic handles 3 are fixedly provided, and a nitrogen inlet pipe 2 is passed through the butter filling tray 1.

[0041] The telescopic handle 3 comprises a telescopic rod, the telescopic rod is fixedly connected to the butter filling tray 1, and a hanging part is provided on the telescopic rod. The whole device is hung and fixed on the pipe mouth by the hanging part to ensure the stability of the device.

[0042] Embodiment seven:

[0043] See also Figure 1 The present embodiment discloses a pipeline isolation and replacement device for oil and gas sites, including a butter filling tray 1, on which a plurality of telescopic handles 3 are fixedly provided, and a nitrogen inlet pipe 2 is passed through the butter filling tray 1.

[0044] The butter filling plate 1 is a variable diameter filling plate. For sewage pipes with different diameters, the radius of the butter filling plate 1 can be adjusted without replacing the butter filling plates 1 with other radii, which further improves the versatility of the device.

[0045] Embodiment eight:

[0046] See also Figure 1 This embodiment discloses a pipeline isolation and replacement device for oil and gas sites, including a butter filling tray 1, a nitrogen inlet pipeline 2 and a plurality of telescopic handles 3.

[0047] The butter filling tray 1 is a prefabricated butter barrel with an inner diameter of 305 mm and a height of 150 mm. Two telescopic handles 3 are welded at symmetrical positions on the wall of the butter barrel. The telescopic handles 3 are used to fix the butter filling tray 1 in the pipeline to be constructed. At the same time, the butter filling tray 1 and the butter can be lifted out by the telescopic handles 3 after the construction is completed.

[0048] A DN25 seamless steel pipe is passed through the butter barrel in the middle of the butter filling plate 1, and nitrogen can be introduced to perform nitrogen replacement on the replacement section. A vent valve is provided on the DN25 seamless steel pipe to adjust the amount of nitrogen introduced. The butter filling plate 1 is filled with butter, and water is poured into the pipeline above the butter blocking part to block it above the construction point to achieve water seal isolation.

[0049] The butter filling plate 1 is detachably fixedly connected to the DN25 seamless steel pipe, which is convenient for assembly. For sewage pipes with different pipe diameters, the butter filling plates 1 with different radii can be replaced, thereby improving the versatility of the device.

[0050] When hot work is to be carried out on the breathing valve pipeline existing on the sewage pipe network of the device, there is no valve for effective isolation, and the utility model can realize the energy isolation and replacement of the special pipe section.

[0051] See also Figure 2 The utility model can be used for isolation and replacement of various pipelines containing toxic gas media that cannot be shut down during operation. By combining a butter plugging device equipped with a special nozzle with a closed nitrogen replacement pipeline, the pipeline can be blocked and uninterrupted nitrogen purging can be performed, thereby achieving effective isolation during high-risk operations such as pipeline opening and hot work. Compared with existing plugging airbags, the present invention has the advantages of simple structure, convenient manufacturing, low cost, reusability, safety, and suitability for various sizes of pipes. The utility model can be widely used for energy isolation of various valve-free cut-off process pipe sections.

[0052] The above content is only for explaining the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A pipeline isolation and replacement device for oil and gas sites, characterized in that: The invention comprises a butter filling tray (1), on which a plurality of telescopic handles (3) are fixedly arranged, and a nitrogen inlet pipe (2) is passed through the butter filling tray (1).

2. A pipeline isolation and replacement device for oil and gas sites as claimed in claim 1, characterized in that: The butter filling tray (1) and the nitrogen inlet pipe (2) are detachably connected.

3. A pipeline isolation and replacement device for oil and gas sites as claimed in claim 2, characterized in that: The detachable movable connection includes a threaded connection, a pin connection, a snap connection and a key connection.

4. The pipeline isolation and replacement device for oil and gas sites as claimed in claim 2, characterized in that: The nitrogen inlet pipe (2) is located at the axis of the butter filling plate (1).

5. The pipeline isolation and replacement device for oil and gas sites as claimed in claim 4, characterized in that: The nitrogen inlet pipeline (2) is provided with a ventilation valve.

6. The pipeline isolation and replacement device for oil and gas sites as claimed in claim 1, characterized in that: The telescopic handle (3) is symmetrically arranged about the axis of the butter filling tray (1).

7. The pipeline isolation and replacement device for oil and gas sites as claimed in claim 6, characterized in that: The telescopic handle (3) comprises a telescopic rod, the telescopic rod is fixedly connected to the butter filling tray (1), and a hanging part is provided on the telescopic rod.

8. The pipeline isolation and replacement device for oil and gas sites as claimed in claim 7, characterized in that: The butter filling tray (1) is a filling tray with a variable diameter.

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