A gas circuit protection device for logging

Abstract

The utility model provides an air path protection device for logging, including an inner tank, the inner tank is formed with a hollow processing chamber, the processing chamber is respectively connected with an air inlet pipe and an air outlet pipe, and a blocking mechanism for blocking the air outlet pipe is arranged in the processing chamber, wherein the blocking mechanism includes a limiting component arranged at the air inlet of the air outlet pipe, and a blocking component movably connected to the limiting component, and the blocking component is configured to be able to move to selectively block the air outlet pipe. By arranging the limiting component and the blocking component at the air outlet position, the blocking component can stably block the air flow conveying pipeline. In this way, the technical problem that the stainless steel ball floats with the liquid surface and has poor stability in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas circuit protection for well logging, in particular to a gas circuit protection device for well logging. Background Art

[0002] In the logging work, analyzing gas logging data is particularly important for discovering and evaluating oil and gas layers. In the work of analyzing gas logging data, the sample gas separated by rock crushing needs to be smoothly transported to the sample gas analysis equipment.

[0003] Since drilling fluid needs to be continuously delivered when breaking rocks, it is necessary to prevent the drilling fluid from entering the sample gas analysis equipment along with the sample gas and causing damage to the sample gas analysis equipment. Therefore, in the prior art, a gas path protection device is generally provided in the sample gas delivery pipeline to prevent the drilling fluid from entering the sample gas analysis equipment.

[0004] The gas circuit protection device in the prior art generally uses a stainless steel ball to block the pipeline. Although this method can block the sample gas transmission pipeline to a certain extent, when the drilling fluid enters the gas circuit protection device, the drilling fluid will be agitated due to the uneven force, thereby causing the stainless steel ball to float. When there is a gap between the stainless steel ball and the pipeline, the drilling fluid will move from the side of the stainless steel ball into the sample gas analysis equipment, causing damage to the sample gas analysis equipment, and thus the sample gas transmission pipeline cannot be stably blocked.

[0005] In addition, the gas path protection device in the prior art only has the function of blocking the pipeline and cannot dry the drilling fluid contained in the sample gas. Therefore, when the moist sample gas enters the sample gas analysis equipment, it will also cause damage to the sample gas analysis equipment. Utility Model Content

[0006] In order to overcome at least one or more of the above-mentioned defects in the prior art, the utility model provides a gas path protection device for logging, which can stably block the pipeline and dry the sample gas.

[0007] According to the utility model, a gas path protection device for logging is provided, comprising an inner tank, wherein the inner tank is formed with a hollow processing chamber, the processing chamber is respectively connected with an air inlet pipe and an air outlet pipe, and a blocking mechanism for blocking the air outlet pipe is arranged in the processing chamber.

[0008] The blocking mechanism includes a limiting component arranged at the air inlet of the air outlet pipe, and a blocking component movably connected to the limiting component, and the blocking component is configured to be movable to selectively block the air outlet pipe.

[0009] In one embodiment, the limiting component includes a fixing column arranged at the air inlet of the air outlet pipe and a limiting block connected to the end of the fixing column, the limiting block has a through hole, and the blocking component is movably arranged in the through hole.

[0010] In one embodiment, the blocking component includes a moving rod movably disposed in a through hole of the limiting block, a blocking block disposed at an end of the moving rod close to the air outlet pipe, and a floating block disposed at an end of the moving rod away from the air outlet pipe.

[0011] In one embodiment, the gas path protection device for logging also includes an outer tank that is attached to the outside of the inner tank and is used to accommodate the inner tank. The outer tank is configured to have a double-layer structure with an outer wall and an inner wall, and a filling cavity is formed between the inner wall and the outer wall.

[0012] In one embodiment, the side wall of the outer tank is provided with at least one first opening communicating with the filling chamber, and an end cover is provided at the position of the first opening.

[0013] In one embodiment, a condensation mechanism is provided on the inner wall of the inner tank.

[0014] In one embodiment, the condensation mechanism includes at least one condensation sheet disposed around the inner wall of the inner tank, and at least one condensation tube disposed along the radial direction of the inner tank.

[0015] In one embodiment, the air inlet pipe treatment chamber extends to a region in the inner tank where the condensation mechanism is located.

[0016] In one embodiment, the inner tank is formed with a second opening, a sealing cover is provided at the second opening, the air inlet pipe and the air outlet pipe are both connected to the sealing cover, and the fixing column is connected to the inner surface of the sealing cover.

[0017] In one embodiment, at least one fixing ring is provided on the surface of the outer tank.

[0018] In general, the above technical solutions conceived by the utility model can achieve the following beneficial effects compared with the prior art:

[0019] 1. The gas path protection device for logging of the utility model is provided with a limit component and a blocking component at the gas outlet position, so that the blocking component can stably block the gas flow pipeline. In this way, the technical problem of the stainless steel ball floating with the liquid surface and poor stability in the prior art is solved.

[0020] 2. The gas path protection device for logging of the utility model is configured to have a double-layer structure of the outer tank, and a refrigerant medium is filled in the double-layer structure, and a condensation mechanism is provided in the inner tank, so as to condense and dry the gas entering the inner tank. In this way, the technical problem that the gas path protection device in the prior art only has the function of blocking the pipeline and cannot dry the drilling fluid is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0022] Figure 1 The overall structure of the gas path protection device for logging according to the utility model is schematically shown.

[0023] It should be noted that the drawings are not necessarily drawn according to actual scale.

[0024] In all the drawings, the same figure marks represent the same technical features, specifically: 100-gas path protection device for logging; 1-outer tank; 11-filling chamber; 12-end cover; 13-fixing ring; 2-inner tank; 21-processing chamber; 22-sealing cover; 23-inlet pipe; 24-outlet pipe; 3-blocking mechanism; 31-limiting component; 311-fixing column; 312-limiting block; 32-blocking component; 321-moving rod; 322-blocking block; 323-floating block; 4-condensing mechanism; 41-condensing sheet; 42-condensing tube. DETAILED DESCRIPTION

[0025] In order to better understand the purpose, structure and function of the utility model, the utility model is described in further detail below in conjunction with the accompanying drawings.

[0026] For convenience, the direction from the bottom of the inner tank 2 toward the top is called "upward" or similar terms, the direction from the bottom of the inner tank 2 toward the top is called "ascending" or similar terms, and the direction from the top of the inner tank 2 toward the bottom is called "downward" or similar terms.

[0027] like Figure 1 As shown, an embodiment of the utility model provides a gas path protection device 100 for logging, including an outer tank 1, which can be a hollow shell of any shape that is convenient for containing materials. In the illustrated embodiment, the outer tank 1 is configured as a circular columnar structure, including a bottom wall, and a side wall extending upward along the edge of the bottom wall, and the side wall is surrounded to form an open shape with a containing space. Among them, an inner tank 2 is detachably arranged in the containing space.

[0028] In one embodiment, Figure 1As shown, the inner tank 2 is hollow inside, forming a processing chamber 21, and has a second opening at the top, and a sealing cover 22 is detachably provided at the second opening. An air inlet pipe 23 is provided on the surface of the sealing cover 22, and the air inlet pipe 23 is connected to the processing chamber 21, and is used to input the sample gas to be processed into the processing chamber 21.

[0029] like Figure 1 As shown, the surface of the sealing cover 22 is also provided with an air outlet pipe 24, and the air outlet pipe 24 is connected to the processing chamber 21. The free end of the air outlet pipe 24 is provided with a negative pressure device (not shown in the figure), and the negative pressure device is used to generate a force on the sample gas inside the processing chamber 21, and transport the sample gas inside the processing chamber 21 to the next process equipment through the air outlet pipe 24. In this connection mode, the sample gas to be processed can be transported to the processing chamber 21 through the air inlet pipe 23, and output by the air outlet pipe 24 after being processed by the processing chamber. In this way, a sample gas flow passage is formed, constituting a movement path of the sample gas.

[0030] In this embodiment, if Figure 1 As shown, the air inlet end of the air outlet pipe 24 is provided with a blocking mechanism 3, which is arranged in the processing chamber 21 and is used to block the air outlet pipe 24 under certain circumstances. In this way, the sample gas movement path can be disconnected, so that the sample gas cannot continue to enter the air outlet pipe 24.

[0031] In one embodiment, the blocking mechanism 3 includes a limiting component 31 disposed inside the processing chamber 21 and located at the air inlet end of the air outlet pipe 24 , and a blocking component 32 movably connected to the limiting component 31 for blocking the air outlet pipe 24 .

[0032] The limiting component 31 includes at least one fixing column 311 connected to the sealing cover 22 and located at the outlet pipe 24. In the illustrated embodiment, two fixing columns 311 are provided, and are correspondingly provided on both sides of the outlet pipe 21. The limiting component 31 also includes limiting blocks 312 respectively provided on opposite sides of the fixing columns 311, and the limiting blocks 312 have through holes, in which the blocking component 32 is movably provided. In this way, the blocking component 32 can move up and down along the through holes on the surface of the limiting blocks 312, thereby selectively blocking the outlet pipe 24.

[0033] In this embodiment, the blocking component 32 includes a moving rod 321 movably disposed in a through hole on the surface of the limiting block 312, a blocking block 322 disposed at the end of the moving rod 321 close to the outlet pipe 24, and a floating block 323 disposed at the end of the moving rod 321 away from the outlet pipe 24. The blocking block 322 is disposed corresponding to the air inlet of the outlet pipe 24. In this way, the blocking block 322 can control the closing or opening of the outlet pipe 24 opening.

[0034] In this way, when in use, the sample gas is transported to the processing chamber 21 through the air inlet pipe 23. The sample gas is subjected to the force applied by the negative pressure mechanism (not shown in the figure) connected to the free end of the air outlet pipe 24 in the processing chamber 21, so the sample gas will enter the air outlet pipe 24 along the edge of the blocking mechanism 3 until the sample gas is transported to the equipment of the next process.

[0035] When drilling fluid is input into the air inlet pipe 23, the drilling fluid enters the processing chamber 21, and the drilling fluid continues to rise in the processing chamber 21. After the drilling fluid contacts the floating block 323, the drilling fluid exerts an upward force on the floating block 323, thereby pushing the floating block 323 to move upward. During the upward movement of the floating block 323, the blocking block 322 is driven to move upward until the blocking block 322 fits the air outlet pipe 24, thereby blocking the air outlet pipe 24. In this way, the blocking of the air outlet pipe 24 is completed, thereby preventing the drilling fluid from entering the next process equipment along the air outlet pipe 24 and causing damage to the next process equipment.

[0036] According to a preferred embodiment of the utility model, the blocking block 322 is configured as a truncated cone structure with a trapezoidal cross section, wherein the upper surface of the blocking block 322 is adapted to the diameter of the outlet pipe 24. In this way, the blocking block 322 can fit tightly with the air inlet of the outlet pipe 24, thereby preventing the drilling fluid from overflowing from the gap between the blocking block 322 and the outlet pipe 24.

[0037] In one embodiment, Figure 1 As shown, the outer tank 1 is configured to have a double-layer structure with an outer wall and an inner wall, and a filling cavity 11 is formed between the inner wall and the outer wall. In this embodiment, different media can be filled in the filling cavity 11 according to different external environmental temperatures.

[0038] When in a high temperature environment, any medium that can achieve a low temperature environment in the processing chamber 21 can be filled in the filling cavity 11. According to this embodiment, the medium is an ice-water mixture.

[0039] In a low temperature environment, any medium that can achieve a heat preservation environment in the processing chamber 21 can be filled in the filling cavity 11. According to this embodiment, the medium is cotton yarn, sponge, asbestos, etc.

[0040] In this way, in a high temperature environment, an ice-water mixture is filled in the filling chamber 11, so that a low temperature processing environment is formed in the processing chamber 21, so that the sample gas molecules in the entire processing chamber 21 are cooled at low temperature, which is helpful to output dry sample gas.

[0041] In a low temperature environment, insulation material is filled in the filling chamber 11 to form an insulation processing environment in the processing chamber 21, so that the sample gas molecules in the entire processing chamber 21 can flow smoothly, avoiding liquefaction and condensation of the sample gas molecules in the processing chamber, which is helpful to output dry sample gas.

[0042] In one embodiment, a condensing mechanism 4 is disposed inside the inner tank 2, and the condensing mechanism 4 is disposed in close contact with the inner wall of the inner tank 2, and is used to receive energy transmitted by the filling cavity 11. Specifically, when the filling cavity 11 is filled with a refrigerant medium, the refrigerant medium can transfer energy to the condensing mechanism 4, so that the condensing mechanism 4 and the refrigerant medium maintain the same temperature. In this way, the processing chamber 21 is further placed in a low temperature environment.

[0043] In one embodiment, the condensation mechanism 4 includes a plurality of condensation sheets 41 arranged around the inner wall of the inner tank 2. In the illustrated embodiment, the plurality of condensation sheets 41 are evenly arranged along the axis direction of the inner tank 2. In this way, when the sample gas enters the processing chamber 21, the sample gas can contact the plurality of condensation sheets 41, thereby increasing the contact area of ​​the sample gas in the processing chamber 21. And the plurality of condensation sheets are all in a low temperature state, thereby improving the condensation efficiency of the sample gas in the processing chamber 21.

[0044] The condensation mechanism 4 further includes a plurality of condensation tubes 42 radially arranged along the inner tank 2. The plurality of condensation tubes 42 can also increase the condensation area of ​​the sample gas in the processing chamber 21, thereby further improving the condensation efficiency.

[0045] According to a preferred embodiment of the present invention, Figure 1 As shown, the air inlet pipe 23 passes through the sealing cover 22 and extends toward the bottom of the processing chamber 21. Specifically, the end of the air inlet pipe 23 is located in the area of ​​the inner tank 2 where the condensation mechanism 4 is provided. In this way, the sample gas input into the processing chamber 21 is located at a low point in the processing chamber 21, thereby increasing the airflow movement path of the sample gas in the processing chamber 21, so that the airflow can be fully condensed in the processing chamber 21.

[0046] According to a preferred embodiment of the utility model, the side wall of the outer tank 1 is provided with at least one first opening connected to the filling cavity 11, and the surface of the first opening is provided with an end cover 12, and the end cover 12 is used to open or close the first opening. In this way, when the end cover 12 is opened, the medium can be added to the filling cavity 11, or the filled medium can be poured out, and when the end cover is sealed, a sealed space can be formed in the filling cavity 11.

[0047] According to a preferred embodiment of the utility model, at least one fixing ring 13 is provided on the surface of the outer tank 1. In the illustrated embodiment, two fixing rings 13 are provided, and the two fixing rings 13 are correspondingly arranged on the surface of the outer tank 1, and the fixing rings 13 are used to provide a fulcrum for the force, so that the outer tank 1 is easy to fix.

[0048] The operation of the gas line protection device 100 for logging according to the present invention is as follows.

[0049] First, the inner tank 2 is placed in the outer tank 1 and the outer tank is stably connected via the fixing ring 13 .

[0050] When the environment is high temperature, the end cover 12 is opened, and the refrigerant medium is filled into the filling cavity 11 , and the end cover 12 is covered so that the filling cavity 11 forms a sealed space.

[0051] During this process, since the inner tank 2 and the outer tank 1 are arranged in close proximity, the energy of the refrigerant medium can be transferred to the surface of the inner tank 2 and transferred to the interior of the processing chamber 21 along the condensing sheet 41 and the condensing tube 42, so that a low-temperature environment is formed in the processing chamber 21.

[0052] Secondly, the sample gas is transported to the processing chamber 21 through the air inlet pipe 23, and the negative pressure mechanism (not shown in the figure) connected to the air outlet pipe 24 is turned on. In this process, the sample gas enters the bottom position of the processing chamber 21 along the air inlet pipe 23. Since the sample gas is subjected to the force exerted by the negative pressure mechanism, the sample gas entering the processing chamber 21 moves upward. In the process of upward movement, the sample gas is cooled by the processing chamber 21, condensed and dried in the processing chamber 21, and the sample gas continues to contact with a plurality of condensing sheets 41 and a plurality of condensing tubes 42 during the rising process, which increases the condensation area and improves the efficiency of condensation and drying. In this way, the condensation and drying of the sample gas is completed.

[0053] When the environment is low temperature, the refrigerant medium in the filling chamber 11 is replaced with a heat-insulating medium, so that a heat-insulating treatment environment is formed in the processing chamber 21, so that the sample gas molecules in the entire processing chamber 21 can flow smoothly, avoiding the liquefaction and condensation of the sample gas molecules in the processing chamber, which is helpful to output dry sample gas.

[0054] After the drilling fluid enters the processing chamber 21 through the air inlet pipe 23, the drilling fluid gradually accumulates in the processing chamber 21. When the drilling fluid reaches the position of the floating block 323, the drilling fluid exerts an upward force on the floating block 323, thereby pushing the floating block 323 to move upward. During the upward movement of the floating block 323, the blocking block 322 is driven to move upward until the blocking block 322 fits the air outlet pipe 24. In this way, the air outlet pipe 24 is blocked, thereby preventing the drilling fluid from entering the next process equipment through the air outlet pipe 24. In this way, the air path protection of logging is achieved.

[0055] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A gas path protection device for logging, characterized in that: The invention comprises an inner tank (2), wherein the inner tank (2) is formed with a hollow processing chamber (21), the processing chamber (21) is respectively connected with an air inlet pipe (23) and an air outlet pipe (24), and a blocking mechanism (3) for blocking the air outlet pipe (24) is arranged in the processing chamber (21). The blocking mechanism (3) comprises a limiting component (31) arranged at the air inlet of the air outlet pipe (24), and a blocking component (32) movably connected to the limiting component (31), wherein the blocking component (32) is configured to be movable to selectively block the air outlet pipe (24).

2. The gas path protection device for logging according to claim 1, characterized in that: The limiting component (31) comprises a fixing column (311) arranged at the air inlet of the air outlet pipe (24) and a limiting block (312) connected to the end of the fixing column (311); the limiting block (312) has a through hole, and the blocking component (32) is movably arranged in the through hole.

3. The gas path protection device for logging according to claim 2, characterized in that: The blocking component (32) comprises a moving rod (321) movably arranged in a through hole of a limiting block (312), a blocking block (322) arranged at an end of the moving rod (321) close to the air outlet pipe (24), and a floating block (323) arranged at an end of the moving rod (321) away from the air outlet pipe (24).

4. The gas path protection device for logging according to claim 1, characterized in that: The gas path protection device for logging also includes an outer tank (1) which is arranged on the outside of the inner tank (2) and is used to accommodate the inner tank (2). The outer tank (1) is arranged to have a double-layer structure with an outer wall and an inner wall, and a filling cavity (11) is formed between the inner wall and the outer wall.

5. The gas path protection device for logging according to claim 4, characterized in that: The side wall of the outer tank (1) is provided with at least one first opening communicating with the filling chamber (11), and an end cover (12) is provided at the position of the first opening.

6. The gas path protection device for logging according to claim 4, characterized in that: A condensation mechanism (4) is provided on the inner wall of the inner tank (2).

7. The gas path protection device for logging according to claim 6, characterized in that: The condensation mechanism (4) comprises at least one condensation sheet (41) arranged around the inner wall of the inner tank (2), and at least one condensation tube (42) arranged along the radial direction of the inner tank (2).

8. The gas path protection device for logging according to claim 1, characterized in that: The air inlet pipe (23) extends from the processing chamber (21) to a region in the inner tank (2) where a condensation mechanism (4) is provided.

9. The gas path protection device for logging according to claim 2, characterized in that: The inner tank (2) is formed with a second opening, a sealing cover (22) is provided at the second opening, the air inlet pipe (23) and the air outlet pipe (24) are both connected to the sealing cover (22), and the fixing column (311) is connected to the inner surface of the sealing cover (22).

10. The gas path protection device for logging according to claim 4, characterized in that: At least one fixing ring (13) is provided on the surface of the outer tank (1).

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