CN207194871U - A kind of coal bed gas well is double to adopt tubular column unit - Google Patents
A kind of coal bed gas well is double to adopt tubular column unit Download PDFInfo
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- CN207194871U CN207194871U CN201720918505.5U CN201720918505U CN207194871U CN 207194871 U CN207194871 U CN 207194871U CN 201720918505 U CN201720918505 U CN 201720918505U CN 207194871 U CN207194871 U CN 207194871U
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Abstract
A kind of coal bed gas well of the utility model offer is double to adopt tubular column unit, belongs to the technical field of coal bed gas well layering mining.Including through the production casing in upper coal seam and lower coal seam, the gas production sleeve pipe being set in production casing and the water drain casing tube being set in gas production sleeve pipe；The first annular space connected with upper coal seam is enclosed between production casing and gas production sleeve pipe；The second annular space connected with lower coal seam is enclosed between gas production sleeve pipe and water drain casing tube.When carrying out mining simultaneously to two layers of coal bed gas using the device, the product in two layers of coal seam is had respectively entered in corresponding passage：The gas-liquid mixture of upper coal seam output is entered in first annular space, the gas-liquid mixture of lower coal seam output is entered in the second annular space, realize the product in two coal seams while separated from coal seam, output respectively, it is independent of each other, solve the access issues of coal bed gas well layering mining, discharge coal bed gas well capacity.
Description
Technical field
The technical field of coal bed gas well layering mining is the utility model is related to, is adopted more particularly to a kind of coal bed gas well is double
Tubular column unit.
Background technology
Coal bed gas refers to be stored in coal seam using methane as main component, with absorption based on the matrix of coal particle surface, portion
The hydrocarbon gas for point being free in coal hole or being dissolved in coal seam water, it is the associated minerals resource of coal, is high-grade energy and change
Work raw material.Caused coal bed gas in progress of coal mining is effectively utilized, the energy in China can be improved to a certain extent
Structure, increase the Gas Energy Source of cleaning, make up deficiency of China's conventional gas in Regional Distribution and quantity delivered.
In the prior art, the exploitation to coal bed gas is usually that sleeve pipe and oil pipe are set in well, and in oil pipe bottom, connection is taken out
Sucking pump, sucker rod is passed through under oil pipe lower going-into-well from ground, is connected with suction pump, suction pump is driven by rotating sucker rod
Rotor is rotated and is operated, under the swabbing action of suction pump, the annular of the admixture of gas of underground between sleeve pipe and oil pipe
It is sucked in space outside well, liquid mixture is sucked into outside well in the annular space between sucker rod and oil pipe.To two
Layer coal seam simultaneously mining when, the product in two layers of coal seam does not have corresponding passage, and be mutually mixed together by mining to well outside, this
Sample easily interferes between two layers of coal seam, can influence coal bed gas well capacity.
The content of the invention
The purpose of this utility model is to provide that a kind of coal bed gas well is double adopts tubular column unit, improves in the prior art to two
During the extraction simultaneously of layer coal seam, the product in two layers of coal seam does not have corresponding passage, and is mutually mixed carry out mining, easily disturbs two
The technical problem of the normal mining in layer coal seam.
A kind of coal bed gas well of the utility model offer is double to adopt tubular column unit, including the production through upper coal seam and lower coal seam
Sleeve pipe, the gas production sleeve pipe being set in production casing and the water drain casing tube being set in gas production sleeve pipe；Production casing and gas production
The first annular space connected with upper coal seam is enclosed between sleeve pipe；Enclosed between gas production sleeve pipe and water drain casing tube and lower coal seam
Second annular space of connection.
Further, the double tubular column unit of adopting of coal bed gas well also includes packer, point adopts and to separate pump and be set in the row
Sucker rod in jacket pipe；Packer is arranged in first annular space, and between upper coal seam and lower coal seam；Divide to adopt and separate
Pump include the outer layer pump housing, outer layer pump housing pump seat, cross over pipe, the internal layer pump housing being arranged in outer pump body and internal layer pump housing pump seat with
And it is arranged on the plunger in the internal layer pump housing；The top and bottom of the outer layer pump housing respectively with gas production sleeve pipe connection；The internal layer pump housing it is upper
End is connected with the water drain casing tube, and lower end is connected with internal layer pump housing pump seat；Outer layer pump housing pump seat is arranged in the internal layer pump housing；UNICOM
Pipe is arranged between packer and upper coal seam, through the side wall of the internal layer pump housing, is tightly connected the outer layer pump housing and outer layer pump housing pump seat；
The upper port of plunger extends to the junction of the internal layer pump housing and water drain casing tube, and is connected with sucker rod, and lower port extends to outer layer
In pump housing pump seat, through hole is provided with side wall, is internally provided with the water cavity connected with through hole；In outer layer pump housing pump seat and internal layer pump
Standing valve is provided with body pump seat；Travelling valve is provided with the upper port of plunger, in lower port and in water cavity；Outer layer
Standing valve in pump housing pump seat is located at the top of cross over pipe；Travelling valve in water cavity is located in the top of the through hole.
Further, the upper end of the internal layer pump housing is connected with water drain casing tube by connection socket.
Further, one end that water drain casing tube is connected with connection socket, which is provided with, draws tiltedly.
Further, the pressure seal that the internal layer pump housing is applied with water drain casing tube by land operation car to the water drain casing tube
Connection.
Compared with prior art, advantage of the present utility model is：
Using coal bed gas well provided by the utility model is double tubular column unit is adopted to two layers of coal bed gas while carry out mining
When, the product in two layers of coal seam can be had respectively entered in corresponding passage：The gas-liquid mixture of upper coal seam output enters production set
In first annular space between pipe and gas production sleeve pipe, coal seam liquid level in formation；The gas-liquid mixture of lower coal seam output enters
In the second annular space between gas production sleeve pipe and water drain casing tube, form lower coal seam liquid level, realize the product in two coal seams simultaneously from
Separated in coal seam, output, is independent of each other respectively, solves the access issues of coal bed gas well layering mining, so as to discharge coal bed gas well
Production capacity.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Other accompanying drawings are obtained, wherein：
Fig. 1 is the double structural representation for adopting tubular column unit of coal bed gas well that the present embodiment provides；
Fig. 2, which is that coal bed gas well shown in Fig. 1 is double, adopts the structural representation for dividing in tubular column unit and adopting and separating pump.
Label：1- production casings；2- gas production sleeve pipes；3- water drain casing tubes；The first annular spaces of 4-；The annular spaces of 5- second；
6- packers；Adopt for 7- points and separate pump；The 71- outer layer pump housings；72- outer layer pump housing pump seats；73- cross over pipes；The 74- internal layer pump housings；In 75-
Layer pump housing pump seat；76- plungers；761- through holes；762- water cavities；77- standing valves；78- travelling valves；8- sucker rods；9- connections
Socket；The upper coal seams of 100-；Coal seam under 200-.
Embodiment
, it is necessary to explanation, the orientation of the instruction such as term " on ", " under ", " interior ", " outer " in description of the present utility model
Or position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of description the utility model and simplification is retouched
State, rather than instruction or imply signified device or element there must be specific orientation, with specific azimuth configuration and operation,
Therefore it is not intended that to limitation of the present utility model.Wherein, " on " refer to extend to direction outside well, " under " refer to extend to
Direction in well.
A kind of coal bed gas well of the present embodiment offer is double to adopt tubular column unit, as shown in figure 1, including running through the upper He of coal seam 100
The production casing 1 in lower coal seam 200, the gas production sleeve pipe 2 being set in production casing 1 and the draining being set in gas production sleeve pipe 2
Sleeve pipe 3；The first annular space 4 connected with upper coal seam 100 is enclosed between production casing 1 and gas production sleeve pipe 2；Gas production sleeve pipe 2
The second annular space 5 connected with lower coal seam 200 is enclosed between water drain casing tube 3.
During in order to improve in the prior art to two layers of coal seam extraction simultaneously, the product in two layers of coal seam does not have corresponding lead to
Road, and carry out mining is mutually mixed, the technical problem of the normal mining in two layers of coal seam is easily disturbed, coal adopts country altogether with coal bed gas
The staff of key lab passes through on-the-spot investigation, experimental design, has invented that above-mentioned coal bed gas well is double to adopt tubular column unit,
Tubular column unit is adopted to two layers of coal bed gas while when carrying out mining, the product in two layers of coal seam can be distinguished using this coal bed gas well is double
Corresponding to entering in passage：The gas-liquid mixture of the upper output of coal seam 100 is entered between production casing 1 and gas production sleeve pipe 2
In first annular space 4, coal seam liquid level in formation；The gas-liquid mixture of the lower output of coal seam 200 enters gas production sleeve pipe 2 and draining
In the second annular space 5 between sleeve pipe 3, lower coal seam liquid level is formed, the product in two coal seams is realized while is separated from coal seam, point
Other output, is independent of each other, and solves the access issues of coal bed gas well layering mining, so as to discharge coal bed gas well capacity.
Further, as shown in figure 1, the double tubular column unit of adopting of coal bed gas well also includes packer 6, point adopts and to separate the and of pump 7
The sucker rod 8 being set in water drain casing tube 3；Packer is arranged in first annular space 4, and is located at upper coal seam 100 and lower coal
Between layer 200；Include the outer layer pump housing 71, outer layer pump housing pump seat 72 as shown in Fig. 2 point adopt and to separate pump 7, cross over pipe 73, be arranged on
The internal layer pump housing 74 and internal layer pump housing pump seat 75 in the outer layer pump housing 71 and the plunger 76 being arranged in the internal layer pump housing 74；Outer pump
The top and bottom of body 71 are connected with gas production sleeve pipe 2 respectively；The upper end of the internal layer pump housing 74 is connected with water drain casing tube 3, lower end with it is interior
Layer pump housing pump seat 75 connects；Outer layer pump housing pump seat 72 is arranged in the internal layer pump housing 74；Cross over pipe 73 is arranged on packer 6 and upper coal
Between layer 100, through the side wall of the internal layer pump housing 74, the outer layer pump housing 71 and outer layer pump housing pump seat 72 are tightly connected；Plunger 76 it is upper
Port extends to the junction of the internal layer pump housing 74 and water drain casing tube 3, and is connected with sucker rod 8, and lower port extends to the outer layer pump housing
Through hole 761 is provided with pump seat 72, in side wall, is internally provided with the water cavity 762 connected with through hole 761；Outer layer pump housing pump seat 72
Standing valve 77 is provided with interior and internal layer pump housing pump seat 75；In the upper port of plunger 76, in lower port and in water cavity 762
It is provided with travelling valve 78；Standing valve 77 in outer layer pump housing pump seat 72 is located at the top of cross over pipe 73；Trip in water cavity 762
Dynamic valve 78 is located in the top of through hole 761.
During upstroke, sucker rod 8 drives plunger 76 to be moved upwards along the internal layer pump housing 74, in the upper port of plunger 76, under
Travelling valve 78 in port and in water cavity 762 is acted on and closed by the internal pressure power of water drain casing tube 3；It is located in outer layer pump housing pump seat 72
Space increase between standing valve 77 and the lower port of plunger 76, pressure reduce, the standing valve 77 in outer layer pump housing pump seat 72
Opened in first annular space 4 under the pressure effect of gas-liquid mixture by top, pressure reduces in first annular space 4, and gas-liquid is mixed
Compound separates, and gas rises along first annular space 4 caused by upper coal seam 100, and liquid caused by upper coal seam 100 is from first annular
Space 4 is entered in outer layer pump housing pump seat 72 by cross over pipe 73, and enters outer layer pump housing pump seat 72 by standing valve 77
In the interior space between standing valve 77 and the lower port of plunger 76；Meanwhile the space increase in the internal layer pump housing 74, pressure subtract
It is small, opened under the pressure effect of the gas-liquid mixture in the second annular space 5 of standing valve 77 in internal layer pump housing pump seat 75 by top,
Pressure in second annular space 5 reduces, and gas-liquid mixture separation, gas is along the second annular space 5 caused by lower coal seam 200
Rise, liquid is entered in the internal layer pump housing 74 by the standing valve 77 in internal layer pump housing pump seat 75 caused by lower coal seam 200, is passed through
Through hole 761 in the side wall of plunger 76, enter in the water cavity 762 connected with through hole 761.During down stroke, sucker rod 8 drives plunger
76 move downward along the internal layer pump housing 74, the sky in outer layer pump housing pump seat 72 between standing valve 77 and the lower port of plunger 76
Between reduce, pressure increase to when pressure is equal in first annular space 4, standing valve 77 in outer layer pump housing pump seat 72 lean on from
Series of fortified passes is closed；Meanwhile space in the internal layer pump housing 74 reduces, pressure increase to when pressure is equal in the second annular space 5, internal layer
Standing valve 77 in pump housing pump seat 75 is closed by deadweight；Sucker rod 8 continues to drive plunger 76 to move downward, outer layer pump housing pump seat
The space in spaces and the internal layer pump housing 74 in 72 between standing valve 77 and the lower port of plunger 76 continues to reduce, pressure after
It is continuous to increase to more than pressure in water drain casing tube 3, in the upper port of plunger 76, the travelling valve 78 in lower port and in water cavity 762
Opened by top, liquid caused by upper coal seam 100 is passed sequentially through in travelling valve 78 and the upper port of plunger 76 in the lower port of plunger 76
Travelling valve 78 enter in water drain casing tube 3, liquid caused by lower coal seam 200 passes sequentially through the travelling valve in water cavity 762
78 and the upper port of plunger 76 in travelling valve 78 enter in water drain casing tube 3.Constantly replaced by upstroke and down stroke, two layers
Gas caused by coal seam is discharged out of first annular the annular space 5 of space 4 and second respectively, and liquid is then mixed by water drain casing tube 3
Close discharge.
Further, as shown in Fig. 2 the upper end of the internal layer pump housing 74 is connected with water drain casing tube 3 by connection socket 9.
Further, water drain casing tube 3 is provided with one end that connection socket 9 is connected draws tiltedly.In lower water drain casing tube 3,
Installation is drawn tiltedly on water drain casing tube 3, draws and impulse is tiltedly played to water drain casing tube 3, ensures that water drain casing tube 3 is lowered vertically into connection and inserted
At mouthfuls 9, and water drain casing tube 3 can be protected during decline, end will not be collided with damage by the borehole wall.By the internal layer pump housing 74 with row
After the completion of jacket pipe 3 connects, draw loxosis in the upper end of connection socket 9.
Further, the pressure that the internal layer pump housing 74 is applied with water drain casing tube 3 by land operation car to the water drain casing tube
It is tightly connected, to ensure the sealing between the internal layer pump housing 74 and water drain casing tube 3.
Embodiment of the present utility model is these are only, not thereby limits the scope of the claims of the present utility model, every utilization
The equivalent structure or equivalent flow conversion that the utility model description is made, or be directly or indirectly used in other related
Technical field, similarly it is included in scope of patent protection of the present utility model.
Claims (4)
1. a kind of coal bed gas well is double to adopt tubular column unit, it is characterised in that：Including through upper coal seam（100）With lower coal seam（200）
Production casing（1）, be set in the production casing（1）Interior gas production sleeve pipe（2）And it is set in the gas production sleeve pipe（2）It is interior
Water drain casing tube（3）；
The production casing（1）With gas production sleeve pipe（2）Between enclose the first annular space connected with the upper coal seam（4）；
The gas production sleeve pipe（2）With water drain casing tube（3）Between enclose the second annular space connected with the lower coal seam（5）；
Also include packer（6）, point adopt and to separate pump（7）Be set in the water drain casing tube（3）Interior sucker rod（8）；
The packer（6）It is arranged on the first annular space（4）It is interior, and it is located at the upper coal seam（100）With lower coal seam
（200）Between；
Adopt for described point and separate pump（7）Including the outer layer pump housing（71）, outer layer pump housing pump seat（72）, cross over pipe（73）, be arranged on it is described
The outer layer pump housing（71）The interior internal layer pump housing（74）With internal layer pump housing pump seat（75）And it is arranged on the internal layer pump housing（74）Interior
Plunger（76）；
The outer layer pump housing（71）Top and bottom respectively with the gas production sleeve pipe（2）Connection；
The internal layer pump housing（74）Upper end and the water drain casing tube（3）Connection, lower end and the internal layer pump housing pump seat（75）Even
Connect；
The outer layer pump housing pump seat（72）It is arranged on the internal layer pump housing（74）It is interior；
The cross over pipe（73）It is arranged on the packer（6）With upper coal seam（100）Between, through the internal layer pump housing（74）'s
Side wall, it is tightly connected the outer layer pump housing（71）With outer layer pump housing pump seat（72）；
The plunger（76）Upper port extend to the internal layer pump housing（74）With water drain casing tube（3）Junction, and with it is described
Sucker rod（8）Connection, lower port extend to the outer layer pump housing pump seat（72）It is interior, through hole is provided with side wall（761）, inside is set
It is equipped with and the through hole（761）The water cavity of connection（762）；
The outer layer pump housing pump seat（72）Interior and internal layer pump housing pump seat（75）Inside it is provided with standing valve（77）；
The plunger（76）Upper port in, in lower port and water cavity（762）Inside it is provided with travelling valve（78）；
The outer layer pump housing pump seat（72）Interior standing valve（77）Positioned at the cross over pipe（73）Top；
The water cavity（762）Interior travelling valve（78）Positioned in the through hole（761）Top.
2. coal bed gas well according to claim 1 is double to adopt tubular column unit, it is characterised in that the internal layer pump housing（74）'s
Upper end and water drain casing tube（3）Pass through connection socket（9）Connection.
3. coal bed gas well according to claim 2 is double to adopt tubular column unit, it is characterised in that the water drain casing tube（3）With
The connection socket（9）Connection one end be provided with draw tiltedly.
4. the coal bed gas well point according to Claims 2 or 3, which is adopted, separates pump, it is characterised in that the internal layer pump housing（74）With
Water drain casing tube（3）Connected by land operation car to the pressure seal that the water drain casing tube applies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720918505.5U CN207194871U (en) | 2017-07-24 | 2017-07-24 | A kind of coal bed gas well is double to adopt tubular column unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720918505.5U CN207194871U (en) | 2017-07-24 | 2017-07-24 | A kind of coal bed gas well is double to adopt tubular column unit |
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| CN207194871U true CN207194871U (en) | 2018-04-06 |
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| CN201720918505.5U Active CN207194871U (en) | 2017-07-24 | 2017-07-24 | A kind of coal bed gas well is double to adopt tubular column unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313753A (en) * | 2017-07-24 | 2017-11-03 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of coal bed gas well point, which is adopted, separates pump and device |
| WO2020211268A1 (en) * | 2019-04-17 | 2020-10-22 | 中国矿业大学 | Single-well drainage-production device and method for double-layer superposed coal bed gas system |
| CN111946308A (en) * | 2020-07-29 | 2020-11-17 | 山西晋城无烟煤矿业集团有限责任公司 | Coal reservoir and underlying goaf coalbed methane layered pressure control combined extraction method |
-
2017
- 2017-07-24 CN CN201720918505.5U patent/CN207194871U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107313753A (en) * | 2017-07-24 | 2017-11-03 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of coal bed gas well point, which is adopted, separates pump and device |
| CN107313753B (en) * | 2017-07-24 | 2019-09-13 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of coal bed gas well point, which is adopted, separates pump and device |
| WO2020211268A1 (en) * | 2019-04-17 | 2020-10-22 | 中国矿业大学 | Single-well drainage-production device and method for double-layer superposed coal bed gas system |
| CN111946308A (en) * | 2020-07-29 | 2020-11-17 | 山西晋城无烟煤矿业集团有限责任公司 | Coal reservoir and underlying goaf coalbed methane layered pressure control combined extraction method |
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