CN201866529U - Coal bed gas collecting and conveying system for coal bed gas field - Google Patents
Coal bed gas collecting and conveying system for coal bed gas field Download PDFInfo
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- CN201866529U CN201866529U CN2010201942233U CN201020194223U CN201866529U CN 201866529 U CN201866529 U CN 201866529U CN 2010201942233 U CN2010201942233 U CN 2010201942233U CN 201020194223 U CN201020194223 U CN 201020194223U CN 201866529 U CN201866529 U CN 201866529U
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- coal
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- seam
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Abstract
The utility model provides a coal bed gas collecting and conveying system for a coal bed gas field, which comprises a gas collecting and pressurizing facility and at least one gas collecting valve set. A gas inlet end of each gas collecting valve set is in fluid communication with each well mouth of the coal bed gas field through a gas collecting pipeline in an operable way and/or is in fluid communication with the gas outlet end of another gas collecting valve set through the gas collecting pipeline in an operable way; the gas outlet end of at least one of the gas collecting valve sets is in fluid communication with the gas inlet end of the gas collecting and pressurizing facility through the gas collecting pipeline in an operable way; the gas outlet ends of the rest gas collecting valve sets are in fluid communication with the gas inlet end of another gas collecting valve set through the gas collecting pipeline in an operable way; and the gas outlet end of the gas collecting and pressurizing facility is in fluid communication with a gas collecting and conveying pipeline in an operable way, so as to convey pressurized coal bed gas outwards. The coal bed gas collecting and conveying system is particularly a multi-point access type flexible collecting and conveying system which can satisfy the production requirement and greatly reduce the cost.
Description
Technical field
The utility model relates generally to the coal-seam gas industrial technology, relates to the coal-seam gas gathering system that is used for the gas field, coal seam particularly.
Background technique
Present domestic coal-seam gas surface construction is in the guiding development experiments stage, and that coal-seam gas has is hypotonic, the characteristics of low pressure, low yield.The average gas output per well of coal bed gas well is 2000m
3/ d, well head aerogenesis (liquid) temperature is 20 ℃, row adopts water yield≤4m
3/ d, oil pipe draining, sleeve pipe gas production, surface casing pressure 0.2～1.0MPa (G).Coal-seam gas is formed based on methane, and the molecule percentage composition is 96.17%, contains a spot of ethane (0.05%), CO
2(0.07%) and N
2(3.71%).The higher calorific value of coal-seam gas is 38.4MJ/m
3, lower calorific value is 34.4MJ/m
3
At present, the traditional coal seam gas gathering system in gas field, coal seam generally adopts gas field gas gathering system process engineering.Gathering and transferring process mainly adopts the defeated flow process of the dendritic combination of sets of radiation promptly: well head is to gas gathering station to booster station, and the cloth station is adopted and disperseed supercharging cloth station scheme, and investment is high, the energy consumption height.This conventional art is very inapplicable to the just very little gas field, coal seam of original output benefit.
The model utility content
Deficiency at coal-seam gas gathering-transferring technology in the prior art; be necessary at coal-seam gas Tanaka coal-seam gas low pressure, low yield, Duo Jing, characteristics that well spacing is little; work out the strong technology of a cover applicability; in the hope of reducing the input-output ratio in gas field, coal seam significantly; to be formed under the prerequisite that satisfies safety in production and environmental protection requirement, reduce cost, increase economic efficiency.
For this reason, the utility model provides a kind of coal-seam gas gathering system that is used for the gas field, coal seam, it comprises gas collection supercharging facility and at least one gas collection valve group, wherein each inlet end of each described gas collection valve group via each well head in gas production pipeline and gas field, coal seam operationally fluid be communicated with, and/or via the outlet side of collecting pipe and another gas collection valve group operationally fluid be communicated with; The outlet side that has a gas collection valve group in the described gas collection valve group at least via the inlet end of collecting pipe and described gas collection supercharging facility operationally fluid be communicated with, and the outlet side of remaining set air valve group via the inlet end of collecting pipe and another gas collection valve group operationally fluid be communicated with; And the outlet side of described gas collection supercharging facility and gas collection multi-purpose station pipeline operationally fluid be communicated with, so that the coal-seam gas after the supercharging is outwards carried.
Preferably, described coal-seam gas gathering system also comprises the liquefaction facility that coal-seam gas is liquefied, described liquefaction facility via the outlet side of described gas collection multi-purpose station pipeline and described gas collection supercharging facility operationally fluid be communicated with.
Preferably, the quantity of described at least one gas collection valve group is two or more.
Preferably, at least one in gas production pipeline, collecting pipe and the gas collection multi-purpose station pipeline is polyethylene pipe or steel pipe.More preferably, gas production pipeline and collecting pipe are polyethylene pipe, and the gas collection multi-purpose station pipeline is a steel pipe; Perhaps the gas production pipeline is a polyethylene pipe, and collecting pipe and gas collection multi-purpose station pipeline are steel pipe.
Coal-seam gas gathering system of the present utility model has formed the flexible gathering system of the multiple spot access type that can satisfy production requirement and reduce cost greatly simultaneously, and it has following advantage at least:
1) well head does not separate, pipeline is not incubated;
2) scheme flexibility of one-level cloth station and adaptability are very strong;
3) multiple spot access, flexible collection transmission pipe network are arranged, are beneficial to enlarging, and it is defeated to be convenient to collection;
4) concentrate supercharging defeated, energy-conservation outward, be convenient to management;
This coal-seam gas gathering system can adapt to the characteristics in gas field, coal seam well, can be applicable to the surface construction in large-scale hypotonic, low pressure, low producing coalbed gas field, satisfy safety, environmental protection and economic needs, technological process is simple and practical, convenient operation and management, significantly reduced site operation personnel's quantity, reduced the investment of coal gas field engineering to greatest extent, energy-saving effect is extremely remarkable.
Description of drawings
Fig. 1 is the schematic representation according to an embodiment's of the utility model coal-seam gas gathering system.
Fig. 2 is the schematic representation according to the coal-seam gas gathering system of a specific embodiment of the utility model, has wherein indicated the throughput direction of coal-seam gas with arrow.
Embodiment
Referring to Fig. 1 and Fig. 2, the coal-seam gas gathering system that is used for the gas field, coal seam of the present utility model comprise be used for to coal-seam gas concentrate the gas collection supercharging facility 2-1 and being used for of pressurization to compile coal-seam gas scalably and compile the most at last after at least one gas collection valve group 1-1 of the gas collection supercharging facility 2-1 that flows to of coal-seam gas, ..., 1-n (wherein n is a positive integer, represents the maximum quantity of gas collection valve group).A part or all gas collection valve group 1-1 ..., the part or all of inlet end in each inlet end of 1-n can via each well head in corresponding gas production pipeline 10 separately and gas field, coal seam operationally fluid be communicated with so that from each well head, gather coal-seam gas.And the part or all of inlet end of some gas collection valve group can via the outlet side of the collecting pipe of another gas collection valve group and another gas collection valve group operationally fluid be communicated with, to compiling once more from the coal-seam gas of lower floor's gas collection valve group.Gas collection valve group 1-1, ..., the outlet side that has a gas collection valve group (for example gas collection valve group 1-15 shown in Fig. 2) among the 1-n at least via the inlet end of collecting pipe 20 and described gas collection supercharging facility 2-1 operationally fluid be communicated with, be transported to gas collection supercharging facility 2-1 with himself pressure of the gas utilization that will compile and concentrate supercharging.The outlet side of remaining set air valve group (for example gas collection valve group 1-1 to 1-14 shown in Fig. 2) can via the inlet end of corresponding collecting pipe separately and another gas collection valve group operationally fluid be communicated with, the coal-seam gas that oneself is compiled finally is transported to gas collection supercharging facility 2-1 after the one or many by upper strata gas collection valve group compiles again again.The outlet side of gas collection supercharging facility 2-1 and gas collection multi-purpose station pipeline 30 operationally fluid are communicated with, so that the coal-seam gas after the supercharging is outwards carried.Those skilled in the art also will be appreciated that gas collection supercharging facility 2-1 in the utility model except that having gas collection, function of increasing pressure, also can dispose proper device therein and realize functions such as handing-over metering.
In a further preferred embodiment, coal-seam gas gathering system of the present utility model also comprises the liquefaction facility 3-1 that liquefies to through the coal-seam gas after the gas collection supercharging facility 2-1 supercharging.Liquefaction facility 3-1 via the outlet side of gas collection multi-purpose station pipeline 30 and gas collection supercharging facility 2-1 operationally fluid be communicated with, with the coal-seam gas after the reception supercharging.
Preferably, the quantity of described at least one gas collection valve group can be two or more.For example in concrete an application, coal-seam gas gathering system of the present utility model can be provided with 15 gas collection valve groups, a gas collection supercharging facility 2-1 (for example gas collection booster station) and a liquefaction facility 3-1 (for example LNG station) according to concrete application factors such as gas field, coal seam characteristics, well head distribution and topographic feature, as shown in Figure 2.In this example of practical application, each well head comes gas at first to enter gas collection valve group, each gas collection valve group is administered about 20 mouthfuls of coal bed gas wells (always having 253 well heads), gas collection valve group is had jurisdiction over each individual well and is come gas to enter collecting pipe, utilize the pressure of self coal-seam gas can be transported to gas collection supercharging facility (or claiming processing station), after gas collection supercharging facility carries out pressurized treatment, pass through outside the gas collection multi-purpose station pipeline defeated.This example only need adopt the mode of regular fast inspection to carry out daily production management at well head and gas collection valve group place unattended duty, compares with traditional gas gathering station scheme to lower construction investment more than 50%, reduces operator's quantity more than 50%.This one-level cloth station scheme shown in Figure 2 has realized that the multiple spot of coal-seam gas inserts, flexible gathering and transferring process, and its cloth station mode is well head～gas collection valve group～gas collection supercharging facility (or processing station)～liquefaction station.This technology utilizes flexible arrangement, the simple gas collection valve of technology group to replace traditional gas gathering station, has effectively reduced the individual well investment, has enlarged the defeated radius of collection simultaneously, and the defeated radius of coal-seam gas collection is risen to more than the 17km.
In addition, those skilled in the art should be further appreciated that and adopt any amount of gas collection valve group according to actual needs in the utility model, can adopt n gas collection valve group, wherein n can be 1-1000 or wider in arbitrary integer, for example 1,10,15,20,30,40 or the like
Preferably, at least one in gas production pipeline 10, collecting pipe 20 and the gas collection multi-purpose station pipeline 30 is polyethylene pipe or steel pipe.More preferably, gas production pipeline and collecting pipe are polyethylene pipe, and the gas collection multi-purpose station pipeline is a steel pipe; Perhaps the gas production pipeline is a polyethylene pipe, and collecting pipe and gas collection multi-purpose station pipeline are steel pipe, can save the pipeline cost of investment to greatest extent satisfying under the situation of usage requirement like this.For example, adopt, the nominal diameter of collecting pipe is during smaller or equal to 250mm or smaller or equal to 240mm or smaller or equal to 200mm, the preferred polyethylene pipe of PE (polyethylene) pipeline material grade that use as PE100, and at nominal diameter greater than 250mm, or during greater than 300mm or greater than 320mm, preferably use steel pipe.
Can find out according to above-mentioned each embodiment, under the situation that does not break away from the utility model spirit and scope, can make various variations and change the utility model.Therefore, those skilled in the art will be appreciated that all each feature described herein and shown in the drawings and details all are illustrative, and nonrestrictive.
Claims (6)
1. a coal-seam gas gathering system that is used for the gas field, coal seam is characterized in that comprising gas collection supercharging facility and at least one gas collection valve group, wherein
Each inlet end of each described gas collection valve group via each well head in gas production pipeline and gas field, coal seam operationally fluid be communicated with, and/or via the outlet side of collecting pipe and another gas collection valve group operationally fluid be communicated with;
The outlet side that has a gas collection valve group in the described gas collection valve group at least via the inlet end of collecting pipe and described gas collection supercharging facility operationally fluid be communicated with, and the outlet side of remaining set air valve group via the inlet end of collecting pipe and another gas collection valve group operationally fluid be communicated with; And
The outlet side of described gas collection supercharging facility and gas collection multi-purpose station pipeline operationally fluid are communicated with, so that the coal-seam gas after the supercharging is outwards carried.
2. coal-seam gas gathering system according to claim 1 is characterized in that, also comprises the liquefaction facility that coal-seam gas is liquefied, described liquefaction facility via the outlet side of described gas collection multi-purpose station pipeline and described gas collection supercharging facility operationally fluid be communicated with.
3. coal-seam gas gathering system according to claim 1 is characterized in that, the quantity of described at least one gas collection valve group is two or more.
4. coal-seam gas gathering system according to claim 1 is characterized in that, at least one in gas production pipeline, collecting pipe and the gas collection multi-purpose station pipeline is polyethylene pipe or steel pipe.
5. coal-seam gas gathering system according to claim 4 is characterized in that, gas production pipeline and collecting pipe are polyethylene pipe, and the gas collection multi-purpose station pipeline is a steel pipe.
6. coal-seam gas gathering system according to claim 4 is characterized in that, the gas production pipeline is a polyethylene pipe, and collecting pipe and gas collection multi-purpose station pipeline are steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201942233U CN201866529U (en) | 2010-05-10 | 2010-05-10 | Coal bed gas collecting and conveying system for coal bed gas field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201942233U CN201866529U (en) | 2010-05-10 | 2010-05-10 | Coal bed gas collecting and conveying system for coal bed gas field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201866529U true CN201866529U (en) | 2011-06-15 |
Family
ID=44137683
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201942233U Expired - Lifetime CN201866529U (en) | 2010-05-10 | 2010-05-10 | Coal bed gas collecting and conveying system for coal bed gas field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201866529U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878434A (en) * | 2011-07-28 | 2013-01-16 | 南通天华和睿科技创业有限公司 | Metering device of multi-way valve used for gathering and transportation |
| CN109058764A (en) * | 2018-09-25 | 2018-12-21 | 中国石油化工股份有限公司临汾煤层气分公司 | A method of simplifying coal bed gas gathering and transportation technology using Venturi transmission ejector |
-
2010
- 2010-05-10 CN CN2010201942233U patent/CN201866529U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878434A (en) * | 2011-07-28 | 2013-01-16 | 南通天华和睿科技创业有限公司 | Metering device of multi-way valve used for gathering and transportation |
| CN109058764A (en) * | 2018-09-25 | 2018-12-21 | 中国石油化工股份有限公司临汾煤层气分公司 | A method of simplifying coal bed gas gathering and transportation technology using Venturi transmission ejector |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110615 |