CN205154109U - Coal seam gas well well head gas leakage recovery unit - Google Patents
Coal seam gas well well head gas leakage recovery unit Download PDFInfo
- Publication number
- CN205154109U CN205154109U CN201520950463.4U CN201520950463U CN205154109U CN 205154109 U CN205154109 U CN 205154109U CN 201520950463 U CN201520950463 U CN 201520950463U CN 205154109 U CN205154109 U CN 205154109U
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- gas
- well head
- well
- coal bed
- air exhaust
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Abstract
The utility model discloses a coal seam gas well well head gas leakage recovery unit in the unconventional gas industry, it comprises drainage gather qi together device and efflux air exhaust device two parts, and wherein drainage gather qi together device is connected and to be communicated with each other in well head packing box below and with the oil pipe of well head, comprises U type pipe deareator, drainage sample pond, level pressure bleed valve, air exhaust hose, and the top of managing deareator in the U type is installed to the level pressure bleed valve to with the negative pressuren zone intercommunication of air exhaust hose with the jet pump. Efflux air exhaust device includes casing pressure table, governing valve, jet pump, bypass line, flowmeter and pipeline pressure table. The utility model discloses coal seam gas well well head gas leakage recovery unit is abundant this valuable non -renewable energy resource of recycle coal bed gas not only, can also avoid coal bed gas contaminated air, and the green house effect of the aggravation earth has also reduced the danger of well head coal bed gas explosion simultaneously, has guaranteed the normal clear of personnel's equipment safety and production.
Description
Technical field
The utility model relates to the coal bed gas well well head air leak recovery device in a kind of Unconventional forage industry.
Background technology
Need steady step-down draining in coal bed gas well manufacturing process, utilize mechanical lift equipment that the water in pit shaft is given rise to ground, progressively reduce flowing bottomhole pressure (FBHP).Along with flowing bottomhole pressure (FBHP) reduces, form pressure drop funnel gradually also progressively to external expansion, and then progressively reduce the reservoir pressure in coal seam, the coal bed gas being adsorbed on matrix of coal internal pore surface is forced to be desorbed, then by the non-darcy flow of matrix pores be diffused into natural fissure, coal bed gas again from crack seepage flow to pit shaft, thus to be plucked out of.Its mode of production relies on deep well pump that the coal seam water of shaft bottom output is exported coal bed gas from sleeve pipe while oil pipe is got rid of, often to carry under one's arms a large amount of coal bed gas from the coal seam water that oil pipe is discharged, Here it is usually said " oil pipe gas blowby ", cause the main cause of oil pipe gas blowby: 1. hole deviation, in the reciprocating process of sucker rod, with oil pipe generation eccentric wear phenomenon, oil pipe is caused to be worn through.2. downhole operation quality is poor, and in operation process, pipe wire buckle is not tightened, and causes silk mouth place to leak gas.3. oil pipe itself is of poor quality, ontological existence sand holes and crack.4. submergence is low, and casing pressure is higher, and it is larger that deep-well pump intake is subject to gases affect.The investment of current coal bed gas well is high, and output benefit is low, and cost pressure is large, and coal seam is more crisp, responsive to pressure oscillation, if frequently go up operation, not only can make cost overrun, but also coal seam can be caused to be damaged, and extends individual well and gives vent to anger time or hold one's breath.The gas leakage of coal bed gas well well head is a large amount of valuable non-renewable energy resources of waste not only, also pollute air, more can cause potential safety hazard, had a strong impact on normally carrying out of coal bed gas production.
Summary of the invention
The purpose of this utility model is to provide a kind of coal bed gas well well head air leak recovery device, makes coal bed gas produce more efficient, environmental protection and safety.
For achieving the above object, the utility model is made up of draining gather qi together device and jet gas extraction device two parts, wherein draining gather qi together device is connected to below wellhead packing box and with the oil pipe of well head and communicates, be made up of U-tube moisture trap, draining sampling pond, valve discharging gas under certain pressure, air exhaust hose, valve discharging gas under certain pressure is arranged on the top of U-tube moisture trap, and is communicated with the negative pressuren zone of jet pump with air exhaust hose.Jet gas extraction device comprises casing pressure table, control valve, jet pump, bypass line, flow meter and line pressure table, and jet gas extraction device one end is connected on sleeve pipe, other end access gas transmission line.
After adopting said structure, in draining gather qi together device, carry under one's arms the coal seam water of coal bed gas gas through U-tube moisture trap inside oil pipe, gravity is relied on to be separated, the coal seam water that density is large is drained in draining sampling pond by U-tube moisture trap, and the coal bed gas gas that density is little then rises and converges to valve discharging gas under certain pressure.Simultaneously in jet gas extraction device, due under the throttling action of control valve, make the casing pressure being positioned at control valve front end be higher than the line pressure of rear end, define pressure differential.Part high pressure coal bed gas enters the nozzle of jet pump by bypass line and forms high-speed jet, make to produce negative pressuren zone around the nozzle of jet pump, because negative pressuren zone is connected with valve discharging gas under certain pressure by air exhaust hose, the coal bed gas gas of valve discharging gas under certain pressure internal leakage under the effect of negative pressure is sucked again the anemostat into jet pump by air exhaust hose, enter gas transmission line with after high pressure coal bed gas gas and vapor permeation, thus reach the object of coal bed gas well well head gas leakage recovery.
Accompanying drawing explanation
Accompanying drawing 1 is the operating diagram of the utility model coal bed gas well well head air leak recovery device.
Detailed description of the invention
Below in conjunction with accompanying drawing 1, the utility model is described in more detail, as shown in Figure 1, the utility model is made up of draining gather qi together device and jet gas extraction device two parts, wherein draining gather qi together device is connected to below wellhead packing box and with the oil pipe 3 of well head and communicates, be made up of U-tube moisture trap 2, draining sampling pond 1, valve discharging gas under certain pressure 13, air exhaust hose 11, valve discharging gas under certain pressure 13 is arranged on the top of U-tube moisture trap 2, and is communicated with the negative pressuren zone of air exhaust hose 11 with jet pump 7.Jet gas extraction device comprises casing pressure table 5, control valve 6, jet pump 7, bypass line 10, flow meter 8 and line pressure table 9, and jet gas extraction device one end is connected on sleeve pipe 4, other end access gas transmission line.
In draining gather qi together device, carry under one's arms the coal seam water of coal bed gas gas when through U-tube moisture trap 2 inside oil pipe 3, gravity is relied on to be separated, the coal seam water that density is large is drained in draining sampling pond 1 by U-tube moisture trap 2, and the coal bed gas gas that density is little then rises and converges to valve discharging gas under certain pressure 13.Simultaneously in jet gas extraction device, under the throttling action due to control valve 6, make the casing pressure being positioned at control valve 6 front end be higher than the line pressure of rear end, define pressure differential.Part high pressure coal bed gas enters the nozzle of jet pump 7 by bypass line 10 and forms high-speed jet, make to produce negative pressuren zone around the nozzle of jet pump 7, because negative pressuren zone is connected with valve discharging gas under certain pressure 13 by air exhaust hose 11, the coal bed gas gas of valve discharging gas under certain pressure 13 internal leakage under the effect of negative pressure is sucked again the anemostat into jet pump 7 by air exhaust hose 11, enter gas transmission line with after high pressure coal bed gas gas and vapor permeation, thus reach the object of coal bed gas well well head gas leakage recovery.
Control valve 6 can be opened size and regulate the pressure differential at jet pump 7 two ends by changing, thus regulates the pressure of gas in valve discharging gas under certain pressure 13, and casing pressure table 5 and line pressure table 9 are connected to the rear and front end of control valve 6, more intuitive and convenient during adjustment.
By coal bed gas well well head air leak recovery device, not only fully can recycle the non-renewable energy resources of this preciousness of coal bed gas, coal bed gas contaminated air can also be avoided, the greenhouse effect of the aggravation earth, decrease the danger of well head coal bed gas blast simultaneously, ensure that personnel equipment's safety and normally carrying out of producing.
Claims (1)
1. a coal bed gas well well head air leak recovery device, be made up of draining gather qi together device and jet gas extraction device two parts, it is characterized in that: wherein draining gather qi together device is connected to below wellhead packing box and with the oil pipe (3) of well head and communicates, be made up of U-tube moisture trap (2), draining sampling pond (1), valve discharging gas under certain pressure (13), air exhaust hose (11), valve discharging gas under certain pressure (13) is arranged on the top of U-tube moisture trap (2), and is communicated with the negative pressuren zone of air exhaust hose (11) with jet pump (7); Jet gas extraction device comprises casing pressure table (5), control valve (6), jet pump (7), bypass line (10), flow meter (8) and line pressure table (9), jet gas extraction device one end is connected on sleeve pipe (4), other end access gas transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520950463.4U CN205154109U (en) | 2015-11-20 | 2015-11-20 | Coal seam gas well well head gas leakage recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520950463.4U CN205154109U (en) | 2015-11-20 | 2015-11-20 | Coal seam gas well well head gas leakage recovery unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205154109U true CN205154109U (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520950463.4U Expired - Fee Related CN205154109U (en) | 2015-11-20 | 2015-11-20 | Coal seam gas well well head gas leakage recovery unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205154109U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821445A (en) * | 2019-10-16 | 2020-02-21 | 中国石油集团川庆钻探工程有限公司 | Nitrogen pumping operation method under condition of low-volume natural gas formation |
-
2015
- 2015-11-20 CN CN201520950463.4U patent/CN205154109U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821445A (en) * | 2019-10-16 | 2020-02-21 | 中国石油集团川庆钻探工程有限公司 | Nitrogen pumping operation method under condition of low-volume natural gas formation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20160413 Termination date: 20161120 |