CN212359727U - Layered metering extraction device for multi-coal-seam gas extraction - Google Patents
Layered metering extraction device for multi-coal-seam gas extraction Download PDFInfo
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- CN212359727U CN212359727U CN202022095419.3U CN202022095419U CN212359727U CN 212359727 U CN212359727 U CN 212359727U CN 202022095419 U CN202022095419 U CN 202022095419U CN 212359727 U CN212359727 U CN 212359727U
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Abstract
The utility model discloses a layered metering extraction device for multi-coal-bed gas extraction, which comprises an extraction pipe and a flowmeter; the extraction pipe comprises at least two layers of combined extraction pipe structures in a sleeve structure, two ends of the extraction pipe positioned in the inner layer extend out of the extraction pipe positioned in the outer layer, and the two layers of extraction pipes are connected through a bushing; all the extraction pipes extend into the inner end pipe sections of the extraction holes and are provided with extraction sieve holes, and hole sealing bags are arranged in the extraction holes and are in sealing connection with the extraction pipes in the inner layer; a hole sealing section is arranged at the hole opening part of the extraction hole and is in sealing connection with the outer wall of the extraction pipe positioned at the outer layer; the outer ends of all the extraction pipes are respectively connected with an extraction system through external pipelines. The beneficial effects of the utility model are that, can realize the layering measurement mode that many coal seams jointly taken out, and simple structure, function are reliable.
Description
Technical Field
The utility model belongs to coal bed gas field of developing, concretely relates to layering measurement of many coal seams gas drainage is taken out and is adopted device.
Background
Coal bed gas extraction is mainly used for two purposes, namely, gas disaster treatment before coal bed exploitation is performed, and gas safety accidents in the coal bed exploitation process are avoided; and secondly, the gas permeability of coal bed gas is researched, and particularly the permeability increasing effect after fracturing permeability increasing is researched. In the research on the coal seam permeability, parameters such as gas storage capacity, gas permeability and the like are generally obtained through conversion by measuring gas extraction amount within a set time. For a single coal seam, the required result can be conveniently achieved by a single extraction pipe and a connecting flowmeter and recording the extraction time. For extraction holes penetrating through multiple coal seams, research aiming at each coal seam needs to perform layered measurement on the corresponding coal seam. However, the prior art lacks such a hierarchical metering technique. For this reason, improvements are required.
Disclosure of Invention
The utility model discloses an it is exactly to lack the not enough of layering measurement in adopting to present many coal seams gas, provides the layering measurement that many coal seams gas was adopted and takes out the device, and the device multilayer sleeve structure's constitution is taken out and is adopted the pipeline structure, and every forms an independent channel of taking out respectively, and every is taken out and is adopted the channel and need measure the coal seam alone respectively to realize the joint of layering measurement through setting up independent flowmeter and take out the mesh.
In order to achieve the above purpose, the present invention adopts the following technical solution.
A layered measurement extraction device for multi-coal-bed gas extraction comprises an extraction pipe and a flowmeter; the extraction pipe comprises at least two layers of combined extraction pipe structures in a sleeve structure, two ends of the extraction pipe positioned in the inner layer extend out of the extraction pipe positioned in the outer layer, and the two layers of extraction pipes are connected through a bushing; all the extraction pipes extend into the inner end pipe sections of the extraction holes and are provided with extraction sieve holes, and hole sealing bags are arranged in the extraction holes and are in sealing connection with the extraction pipes in the inner layer; a hole sealing section is arranged at the hole opening part of the extraction hole and is in sealing connection with the outer wall of the extraction pipe positioned at the outer layer; the outer ends of all the extraction pipes are respectively connected with an extraction system through external pipelines.
By adopting the device of the scheme, the extraction pipes are in a sleeve structure, two ends of the extraction pipe positioned in the inner layer extend out of the extraction pipe positioned in the outer layer, and the two layers of extraction pipes are connected through the bushing, so that the outer layer forms an outer layer extraction channel; all the extraction pipes extend into the inner end pipe sections of the extraction holes, extraction sieve holes are formed in the pipe sections so as to perform extraction corresponding to the corresponding coal seams, hole sealing bags are arranged in the extraction holes and are in sealing connection with the extraction pipes located in the inner layers so as to form isolation of two adjacent coal seam extraction channels; a hole sealing section is arranged at the hole opening part of the extraction hole and is in sealing connection with the outer wall of the extraction pipe positioned at the outer layer so as to form the isolation of the outer layer channel from the external environment; the outer ends of all the extraction pipes are respectively connected with an extraction system through external pipelines, a flowmeter is arranged on each external pipeline, so that each extraction pipe forms an independent extraction channel, each extraction channel corresponds to a coal seam needing to be measured independently, and the purpose of combined extraction of layered measurement is achieved by arranging the independent flowmeters. The device can effectively solve the problem of layered metering of multi-coal-seam combined extraction, and all layers in the combined extraction pipe of the sleeve structure are sequentially sleeved to form a concentric structure, so that the section size of the combined structure can be effectively reduced, and the hole sealing effect is better when the coal seam is isolated and sealed by the bag. The structure is simple and the function is reliable.
Preferably, the combined extraction pipe is formed by combining an inner layer extraction pipe and an outer layer extraction pipe from inside to outside. The method can be used for sealing metering of two coal seams, and can also be used for the situation of comprehensive metering of mixed extraction of three coal seams, wherein one coal seam is independently metered, and the other two coal seams are mixed.
Preferably, the extraction sieve holes on the outer layer extraction pipe are distributed in two areas in the length direction of the extraction pipe. The coal bed gas-liquid separation and extraction integrated metering device is used for the comprehensive metering situation that the coal beds at the inner ends are independently metered and the two coal beds at the outer ends are mixed for extraction in three coal beds.
Preferably, the combined extraction pipe is formed by combining an inner layer extraction pipe, a middle layer extraction pipe and an outer layer extraction pipe from inside to outside. The method can be used for the layered metering of three coal seams.
The beneficial effects of the utility model are that, can realize the layering measurement mode that many coal seams jointly taken out, and simple structure, function are reliable.
Drawings
Fig. 1 is a schematic structural diagram of a first structural form of the present invention.
Fig. 2 is a schematic structural diagram of a second structural form of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, which are not intended to limit the scope of the embodiments described herein.
In embodiment 1, referring to fig. 1, a layered metering extraction device for multi-coal-seam gas extraction comprises an extraction pipe and a flowmeter; the extraction pipe comprises at least two layers of combined extraction pipe structures in a sleeve structure, two ends of an extraction pipe positioned in an inner layer extend out of an extraction pipe positioned in an outer layer, and the two layers of extraction pipes are connected through a lining 1; all the extraction pipes extend into the inner end pipe sections of the extraction holes and are provided with extraction sieve holes 2, hole sealing bag bags 3 are arranged in the extraction holes, and the hole sealing bag 3 is hermetically connected with the extraction pipes in the inner layer to form isolation of two adjacent coal seam extraction channels; a hole sealing section 4 is arranged at the hole opening part of the extraction hole, and the hole sealing section 4 is hermetically connected with the outer wall of the extraction pipe positioned at the outer layer so as to form the isolation of an outer layer channel from the external environment; the outer ends of all the extraction pipes are respectively connected with an extraction system through external pipelines, and each external pipeline is provided with a flowmeter, so that each extraction pipe forms an independent extraction channel, and each extraction channel corresponds to a coal seam needing to be measured independently.
The combined extraction pipe is formed by combining an inner layer extraction pipe 5 and an outer layer extraction pipe 6 from inside to outside, and extraction sieve holes 2 on the outer layer extraction pipe 6 are distributed in two areas in the length direction of the extraction pipe.
In this embodiment, the bushing 1 and the adjacent pipe wall form a sealing connection through an O-ring.
In the embodiment, the inner-layer extraction pipe 5 extracts and measures the gas of the inner-layer coal seam M1 independently, and the outer-layer extraction pipe 6 extracts and mixes the middle-layer coal seam M2 and the outer-layer coal seam M3 to form comprehensive measurement of the two coal seams.
In the embodiment 2, referring to fig. 2, the combined extraction pipe is formed by combining an inner layer extraction pipe 5, a middle layer extraction pipe 7 and an outer layer extraction pipe 6 from inside to outside, and a hole sealing bag 3 for isolating adjacent coal seams is also arranged between the exposed part of the inner end of the middle layer extraction pipe 7 and an extraction hole.
The rest of the structure of this embodiment is the same as that of embodiment 1, and is not described herein again.
In this embodiment, the inner layer coal seam M1, the middle layer coal seam M2 and the outer layer coal seam M3 are extracted separately through the inner layer extraction pipe 5, the middle layer extraction pipe 7 and the outer layer extraction pipe 6, and are measured in layers.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A layered measurement extraction device for multi-coal-bed gas extraction comprises an extraction pipe and a flowmeter; the extraction pipe is characterized by comprising at least two layers of combined extraction pipe structures in a sleeve structure, wherein two ends of an extraction pipe positioned on the inner layer extend out of an extraction pipe positioned on the outer layer, and the two layers of extraction pipes are connected through a lining (1); all the extraction pipes extend into the inner end pipe sections of the extraction holes and are provided with extraction sieve holes (2), the extraction holes are internally provided with hole sealing bag bags (3), and the hole sealing bags (3) are hermetically connected with the extraction pipes positioned in the inner layer; a hole sealing section (4) is arranged at the hole opening part of the extraction hole, and the hole sealing section (4) is hermetically connected with the outer wall of the extraction pipe positioned at the outer layer; the outer ends of all the extraction pipes are respectively connected with an extraction system through external pipelines.
2. The device according to claim 1, characterized in that the combined extraction pipe is formed by combining an inner layer extraction pipe (5) and an outer layer extraction pipe (6) from inside to outside.
3. The device according to claim 2, characterized in that the extraction screen holes (2) on the outer extraction pipe (6) are distributed in two zones in the length direction of the extraction pipe.
4. The device according to claim 1, characterized in that the combined extraction pipe is formed by combining an inner layer extraction pipe (5), a middle layer extraction pipe (7) and an outer layer extraction pipe (6) from inside to outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022095419.3U CN212359727U (en) | 2020-09-21 | 2020-09-21 | Layered metering extraction device for multi-coal-seam gas extraction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022095419.3U CN212359727U (en) | 2020-09-21 | 2020-09-21 | Layered metering extraction device for multi-coal-seam gas extraction |
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| CN212359727U true CN212359727U (en) | 2021-01-15 |
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| CN202022095419.3U Expired - Fee Related CN212359727U (en) | 2020-09-21 | 2020-09-21 | Layered metering extraction device for multi-coal-seam gas extraction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542041A (en) * | 2022-03-02 | 2022-05-27 | 纪国柱 | High-efficient displacement of coal seam gas is taken out and is adopted device based on carbon dioxide deep is sealed up and is deposited |
| CN114575815A (en) * | 2022-03-09 | 2022-06-03 | 纪国柱 | Coal bed gas microorganism yield increase experimental device and method based on different fracturing fluid environments |
-
2020
- 2020-09-21 CN CN202022095419.3U patent/CN212359727U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114542041A (en) * | 2022-03-02 | 2022-05-27 | 纪国柱 | High-efficient displacement of coal seam gas is taken out and is adopted device based on carbon dioxide deep is sealed up and is deposited |
| CN114575815A (en) * | 2022-03-09 | 2022-06-03 | 纪国柱 | Coal bed gas microorganism yield increase experimental device and method based on different fracturing fluid environments |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210115 |