Blowout device for gas testing of natural gas well
By setting up independent combustion and liquid storage areas in the natural gas well testing unit, and using inclined guide steps and fireproof baffles to achieve gas-liquid separation, the problems of inaccurate liquid metering and safety were solved, and the accuracy and safety of production capacity evaluation were improved.
Patent Information
- Application Number
- CN202423195689.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In existing technologies, liquid metering is inaccurate during natural gas well testing, and the high temperature of flame combustion causes liquid evaporation, affecting the accuracy and safety of production capacity evaluation.
Design a venting device that separates the combustion zone of natural gas from the storage zone of liquid. Gas-liquid separation is achieved through inclined guide steps and fireproof barriers, and a collection tank is installed in the storage zone to collect the liquid.
This effectively avoids the high-temperature evaporation of liquid by flames, improves the accuracy of liquid measurement and the authority of natural gas well productivity evaluation, and enhances the safety and efficiency of gas testing.
Smart Images
Figure CN223608512U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to natural gas well gas testing technical field, concretely relates to a kind of for natural gas well gas testing blowout device. BACKGROUND
[0002] At present, the liquid and natural gas under the well during the gas testing operation of natural gas well will be discharged to blowout pond temporary collection. Since natural gas cannot be directly discharged into the atmosphere, it is necessary to carry out ignition combustion in the blowout pond. However, the liquid in the blowout pond in the prior art is usually in the same area as the combustion flame, so the high temperature of the flame combustion can evaporate the liquid in the blowout pond, thereby causing the total amount of liquid in the blowout pond to decrease rapidly.
[0003] Since accurate measurement of the discharged liquid is required during gas testing, liquid measurement is an important data for judging the properties of the formation, and also plays an important role in evaluating the productivity of the natural gas well.
[0004] Therefore, it is desirable in the art to provide a blowout device for natural gas well gas testing to solve the problem of inaccurate liquid measurement during gas testing. SUMMARY
[0005] The utility model aims at providing a blowout device for natural gas well gas testing, which can set the combustion area of natural gas and the storage area of liquid as independent areas, thereby effectively avoiding the evaporation of liquid due to the high temperature of flame combustion, to further improve the accuracy and authority of the evaluation of the productivity of the natural gas well.
[0006] According to the utility model, a blowout device for natural gas well gas testing is provided, which comprises a blowout pond, the blowout pond comprises a separation zone, a combustion zone arranged above the separation zone, and a liquid storage zone connected with the separation zone, and
[0007] a blowout pipeline extending into the combustion zone and connected with the natural gas well,
[0008] wherein the fluid from the natural gas well is separated into gas and liquid at the outlet end of the blowout pipeline, the separated natural gas flows to the combustion zone, and the separated liquid flows to the separation zone.
[0009] In one embodiment, a guide step is arranged in the separation zone and allows liquid to flow to the liquid storage zone.
[0010] In one embodiment, a collection tank for containing liquid is arranged in the liquid storage zone, and the collection tank comprises a front plate connected with the guide step.
[0011] In one embodiment, an angle between the guide step and the front plate is in the range of 120° to 145°.
[0012] In one embodiment, a fireproof fence is arranged in the combustion zone, and the fireproof fence comprises a pair of first fences symmetrically arranged and fixed on the guide step, and a second fence fixedly connected with the two first fences.
[0013] In one embodiment, a longitudinal extension line of the front plate coincides with a longitudinal extension line of the second fence.
[0014] In one embodiment, a gap allowing the liquid to flow is left between the second fence and the front plate.
[0015] In one embodiment, the collecting box further comprises a fence plate fixedly connected with the front plate.
[0016] In one embodiment, the fence plate is configured in a U-shaped structure, and scale marks for observing the liquid level are arranged on the fence plate.
[0017] In one embodiment, the blowout device further comprises a support table fixedly connected with the guide step and flush with an upper end surface of the fence plate, and a spacing is left between the blowout pipeline and the support table.
[0018] Compared with the prior art, the utility model has the advantages that:
[0019] Firstly, the utility model sets the combustion area of the natural gas and the storage area of the liquid as independent areas, thereby effectively avoiding the evaporation of the liquid due to the high temperature of the flame, and further improving the accuracy and authority of the evaluation of the productivity of the natural gas well.
[0020] Secondly, the utility model arranges the guide step in an inclined manner, so that the separated liquid can move downward on the guide step at a faster speed, thereby shortening the residence time of the liquid in the separation zone.
[0021] In addition, in the utility model, the height of the liquid flow is limited by the gap formed between the second fence and the front plate, so that the liquid passing through the gap can obtain a better outflow angle, and thus can more easily and quickly fall into the bottom of the collecting box, so as to achieve the purpose of quickly collecting the separated liquid.
[0022] Thirdly, the utility model sets the upper end surfaces of the first fence and the second fence as flush structures, so that the range of the flame generated by the combustion of the natural gas can be effectively limited, and the safety of the gas testing work of the natural gas well is further improved. BRIEF DESCRIPTION OF DRAWINGS
[0023] The utility model will be described in detail below in combination with the drawings, in the drawings,
[0024] Figure 1 The structure of the blowout device for gas testing of a natural gas well according to the utility model is schematically shown;
[0025] Figure 2 The sectional view of the blowout device for gas testing of a natural gas well according to the utility model is shown;
[0026] Figure 3 The top view of the blowout device for gas testing of a natural gas well according to the utility model is shown.
[0027] In the drawings, the same components use the same reference signs. The drawings are not drawn according to the actual scale. DETAILED DESCRIPTION
[0028] In order to make the technical scheme and advantages of the utility model clearer and more apparent, the exemplary embodiments of the utility model will be further described in detail below in combination with the drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than an exhaustive enumeration of all the embodiments. And in the case of no conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.
[0029] The utility model will be further described below in combination with the drawings.
[0030] Figure 1 The structure of the blowout device 100 for gas testing of a natural gas well according to the utility model is schematically shown;
[0031] Figure 2 The sectional view of the blowout device 100 for gas testing of a natural gas well according to the utility model is shown;
[0032] Figure 3 The top view of the blowout device 100 for gas testing of a natural gas well according to the utility model is shown.
[0033] As Figure 2 shown, the blowout device 100 for gas testing of a natural gas well according to the utility model comprises a blowout pool. The blowout pool comprises a separation zone 11, a combustion zone 12 and a liquid storage zone 20, wherein the combustion zone 12 is above the separation zone 11, and the liquid storage zone 20 is below the separation zone 11, and the liquid storage zone 20 is in communication with the separation zone 11.
[0034] According to the utility model, as Figures 1 to 3 shown, the blowout device 100 for gas testing of a natural gas well further comprises a blowout pipeline 30. Preferably, the first end of the blowout pipeline 30 extends into the combustion zone 12, and the second end of the blowout pipeline 30 can be connected with the natural gas well.
[0035] Therefore, the fluid from the natural gas well can be gas-liquid separated at the outlet of the blowout pipeline 30, wherein the separated gas can be fully and comprehensively combusted in the combustion zone 12, and the separated liquid can enter the liquid storage zone 20 through the guide step 111 (to be introduced below) in the separation zone 11, so as to realize the isolation of the gas and the liquid, and further serve the purpose of preventing the liquid in the liquid storage zone 20 from being evaporated when the gas is combusted.
[0036] In the utility model, the gas is preferably natural gas.
[0037] In one embodiment, as shown in Figure 1 and 2 , the guide step 111 is arranged in the separation zone 11. Preferably, the guide step 111 can receive the liquid separated at the outlet of the blowout pipeline 30, and can guide the liquid into the liquid storage zone 20, so as to ensure that the combustion of the natural gas and the storage of the liquid can be carried out in relatively independent zones, thereby serving the purpose of preventing the liquid in the liquid storage zone 20 from being evaporated when the natural gas is combusted.
[0038] Since the discharged liquid needs to be accurately metered during the gas testing, the liquid metering is important data for judging the formation properties, and also plays an important role in evaluating the productivity of the natural gas well. Therefore, the combustion zone of the natural gas and the storage zone of the liquid are arranged as independent zones in the utility model, so as to effectively avoid the evaporation of the liquid due to the high temperature of the flame combustion, thereby further improving the accuracy and authority of the evaluation of the productivity of the natural gas well.
[0039] According to the utility model, as shown in Figure 1 and 2 , the collection box 21 is arranged in the liquid storage zone 20 and is configured in a square structure. The collection box 21 can fully receive and contain the separated liquid. Preferably, the collection box 21 includes a front plate 211 connected with the guide step 111, and a surrounding plate 212 configured in a U-shaped structure, wherein the surrounding plate 212 is fixedly connected with the front plate 211, so as to have better sealing performance, so as to contain more separated liquid.
[0040] Preferably, a scale mark (not shown) is arranged on the inner wall of the surrounding plate 212. Preferably, during the actual operation, the liquid level in the collection box 21 can be judged by observing the scale mark, so as to realize the purpose of accurately metering the discharged liquid.
[0041] In one embodiment, the guide step 111 is arranged obliquely. Preferably, an included angle between the guide step 111 and the front plate 211 is in the range of 120°-145°. In this way, the separated liquid can move downward on the guide step 111 at a faster speed, thereby shortening the residence time of the liquid in the separation zone 11.
[0042] In other embodiments, other included angles can be formed between the guide step 111 and the front plate 211. In theory, the included angle is greater than 90° and less than 180°, and the greater the included angle, the more conducive to liquid flow. However, it needs to be considered in combination with the blowout port pressure, natural gas production, blowout liquid volume and the area required by the natural gas combustion area, and the specific value needs to be determined according to the requirements of specific experiments.
[0043] According to the utility model, the fireproof fence is arranged in the combustion zone 12. As shown in Figure 1 and 2 , preferably, the fireproof fence comprises a pair of symmetrically arranged first baffles 121 and a second baffle 122 fixedly connected with the two first baffles 121. Each first baffle 121 is configured in a trapezoidal structure and can form a fixed and sealed connection with the guide step 111, thereby ensuring that the liquid can smoothly flow into the collection tank 21 through the guide step 111.
[0044] Preferably, the upper end faces of the first baffle 121 and the second baffle 122 are flush, thereby effectively limiting the range of the flame generated by the natural gas combustion, and further improving the safety of the natural gas well test.
[0045] In one embodiment, as shown in Figure 2 , the longitudinal extension line of the front plate 211 coincides with the longitudinal extension line of the second baffle 122, and a gap 13 is left between the second baffle 122 and the front plate 211. Preferably, the liquid flowing downward through the guide step 111 can smoothly flow into the collection tank 21 under the limiting of the second baffle 122 and the first baffle 121.
[0046] In the utility model, the height of the liquid flow is limited by the gap 13 formed by the second baffle 122 and the front plate 211, thereby ensuring that the liquid passing through the gap 13 can obtain a better outflow angle, and then can more easily and quickly fall into the bottom of the collection tank 21, to achieve the purpose of quickly collecting the separated liquid.
[0047] According to the utility model, as shown in Figure 2 , the blowout device 100 for natural gas well test further comprises a support table 40 fixedly connected with the guide step 111 and flush with the upper end face of the fence plate 212. Preferably, a spacing is left between the blowout pipeline 30 and the support table 40.
[0048] In this way, not only can the falling speed of the separated liquid be improved, so that the liquid can obtain greater kinetic energy on the guide step 111 to shorten the time of entering the collection box 21, but also the separated gas can enter the combustion zone 12 more quickly and the gas testing work can be carried out in a safer manner under the action of the fireproof fence.
[0049] Compared with the prior art, the advantages of the utility model lie in:
[0050] Firstly, the utility model discloses a natural gas combustion area and a liquid storage area are arranged as independent areas, thereby effectively avoiding the high-temperature evaporation of the liquid due to the flame combustion, and further improving the accuracy and authority of the natural gas well productivity evaluation.
[0051] Secondly, the utility model discloses a guide step 111 is arranged in an inclined manner, so that the separated liquid can move downward on the guide step 111 at a faster speed, thereby shortening the residence time of the liquid in the separation zone 11.
[0052] In addition, in the utility model, the height of the liquid flow is limited by the gap 13 formed by the second baffle 122 and the front plate 211, so that the liquid passing through the gap 13 can obtain a better outflow angle, and then can be more easily and quickly dropped into the bottom of the collection box 21, so as to realize the purpose of quickly collecting the separated liquid.
[0053] Thirdly, the utility model discloses that the upper end faces of the first baffle 121 and the second baffle 122 are arranged in a flush structure, so that the range of the flame generated by the natural gas combustion can be effectively limited, and the safety of the natural gas well gas testing work is further improved.
[0054] In the description of the utility model, it should be understood that the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more features.
[0055] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected, can be mechanically connected, or can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, or can be the communication between two elements.
[0056] For ordinary skilled persons in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.
[0057] The preferred embodiments of the present application have been described above with the preferred embodiments, but the protection scope of the present application is not limited thereto. Those skilled in the art can easily make changes or variations within the disclosure of the present application, and such changes or variations should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A flow release device for testing a natural gas well, characterized in that, The application relates to a blowout device for natural gas wells. The blowout device comprises a blowout tank, a blowout pipeline and a support table. The blowout tank comprises a separation zone (11), a combustion zone (12) arranged above the separation zone (11), and a liquid storage zone (20) connected with the separation zone (11). The blowout pipeline (30) extends into the combustion zone (12) and is connected with the natural gas well.
2. The flow release device for testing gas of a natural gas well according to claim 1, characterized in that, Fluid from the natural gas well is separated into gas and liquid at the outlet end of the blowout pipeline (30), the separated gas flows to the combustion zone (12), and the separated liquid flows to the separation zone (11).
3. The flow release device for testing gas of a natural gas well according to claim 2, characterized in that, The separation zone (11) is provided with a guide step (111) arranged obliquely and allowing the liquid to flow to the liquid storage zone (20).
4. The flow release device for testing gas of a natural gas well according to claim 3, characterized in that, The liquid storage zone (20) is provided with a collection box (21) for containing the liquid, and the collection box (21) comprises a front plate (211) connected with the guide step (111).
5. The flow release device for testing gas of a natural gas well according to claim 4, characterized in that, An included angle between the guide step (111) and the front plate (211) is in the range of 120-145 degrees.
6. The flow release device for testing gas of a natural gas well according to claim 5, characterized in that, The combustion zone (12) is provided with a fireproof fence, which comprises a pair of first baffles (121) arranged symmetrically and fixed on the guide step (111), and a second baffle (122) fixedly connected with the two first baffles (121).
7. The flow release device for testing gas of a natural gas well according to claim 6, characterized in that, The longitudinal extension line of the front plate (211) coincides with the longitudinal extension line of the second baffle (122).
8. The flow release device for testing gas of a natural gas well according to claim 7, characterized in that, A gap (13) allowing the liquid to flow through is left between the second baffle (122) and the front plate (211).
9. The flow release device for testing gas of a natural gas well according to claim 8, characterized in that, The collection box (21) further comprises a fence plate (212) fixedly connected with the front plate (211).
10. The flow release device for testing gas of a natural gas well according to claim 9, characterized in that, The fence plate (212) is configured in a U-shaped structure, and scale marks for observing the liquid level are arranged on the fence plate (212). The blowout device further comprises a support table (40) fixedly connected with the guide step (111) and flush with the upper end surface of the fence plate (212), and a spacing is left between the blowout pipeline (30) and the support table (40).