CN204851187U - Coal bed gas drainage system - Google Patents
Coal bed gas drainage system Download PDFInfo
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- CN204851187U CN204851187U CN201520444364.9U CN201520444364U CN204851187U CN 204851187 U CN204851187 U CN 204851187U CN 201520444364 U CN201520444364 U CN 201520444364U CN 204851187 U CN204851187 U CN 204851187U
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Abstract
The utility model relates to a coal bed gas drainage system. This drainage system high -pressure water injection pump, ground settling chamber, power fluid tubular column, mixed liquid tubular column, jet pump, check valve, seat encapsulation are in the pit put and the screen pipe, the water inlet of high -pressure water injection pump and ground settling chamber's delivery port intercommunication, the delivery port of high -pressure water injection pump passes through well head production tree and power fluid tubular column water inlet intercommunication, the delivery port of power fluid tubular column and jet pump upper end intercommunication in the pit, power fluid circulation passageway, mix the outside of liquid tubular column suit at the power fluid tubular column, it mixes the liquid passageway to form between the inner wall of mixed liquid tubular column and the outer wall of power fluid tubular column, mix the water inlet intercommunication that the liquid passageway passes through well head production tree and ground settling chamber, the lower extreme of jet pump connects gradually the check valve in the pit, the seat encapsulation is put and the screen pipe, the seat encapsulation is put and is cut off formation water and mixed liquid passageway, the screen pipe is located the formation water. This system leans on hydraulic drive to drive the problem of having solved inclined to one side mill of sucker rod and buggy holddown.
Description
Technical field
The utility model belongs to oil, gas well technical field of operation, particularly relates to one and avoids eccentric wear, holddown and upkeep operation novel coal bed gas drainage system frequently.
Background technology
Domestic traditional CBM Drainage excavating technology generally adopts sucker rod pump mining system, drives sucker rod to drive down-hole pump work by oil pumper.The impact of many environmental factors such as little by coal bed gas well discharge capacity, coal dust is many, there is the problems such as serious investment is large, equipment does not match, find time, pump detection period is short in this system.Be mainly reflected in the following aspects:
1, mining equipment choosing model is generally greater than the model required for reality;
2, ground driving arrangement and down-hole pump do not match, and occur the situation that can not meet down-hole pump demand or substantially exceed down-hole pump demand;
3, the excessive mine water that causes of mining system discharge capacity is emptying; Coal dust is too much, works long hours coal dust to be piled up cause moving component in pump stuck, and oil pumper drives sucker rod work by machine driving simultaneously, cause sucker rod for a long time stressed deforming there is eccentric wear, even may worn out oil pipe, cause frequent operation.
Utility model content
In order to solve the above-mentioned technical problem existed in background technology, the utility model provides a kind of CBM Drainage water system driving down-hole pump work by hydraulic drive, this system does not need the feature of mechanical movement to solve the problem of sucker rod partial wear and coal dust holddown, extend the application life of down-hole pump, decrease operating cost.
Technical solution of the present utility model is:
The utility model provides a kind of CBM Drainage water system, and its improvements are: comprise ground installation, underground equipment and wellhead tree tree;
Described ground installation comprises high pressure water-injection pump, surface settlement case;
Described underground equipment comprises power fluid tubing string, mixed liquor tubing string, downhole jet pump, one way valve, setting device and screen casing;
The water inlet of described high pressure water-injection pump is communicated with the delivery port of surface settlement case; The delivery port of described high pressure water-injection pump is communicated with power fluid tubing string water inlet by wellhead tree tree; The delivery port of described power fluid tubing string is communicated with downhole jet pump upper end, power fluid circulation passage;
Described mixed liquor tubing string is sleeved on the outside of power fluid tubing string; Mixed liquor passage is formed between the inwall of described mixed liquor tubing string and the outer wall of power fluid tubing string; Described mixed liquor passage is communicated with the water inlet of surface settlement case by wellhead tree tree;
The lower end of described downhole jet pump connects one way valve, setting device and screen casing successively; Described setting device is by formation water and mixed liquor passageway break; Described screen casing is positioned at formation water.
Above-mentioned one way valve is arranged in the pump barrel of downhole jet pump, connects into as a whole with downhole jet pump.
Above-mentioned setting device comprises setting base and setting leather cup; Described setting floor installation is in the lower end of one way valve; Described setting leather cup is arranged on setting base.
Between the water inlet of above-mentioned high pressure water-injection pump and the delivery port of surface settlement case, high pressure water-injection pump delivery port set with wellhead tree between and wellhead tree set and all adopt surface line to be connected between the water inlet of surface settlement case; Described surface line adopts stainless steel seamless pipe to make.
Above-mentioned surface line is provided with measuring instrument; Described measuring instrument comprises for regulating the control valve of displacement and the flow meter for measuring displacement.
Above-mentioned surface settlement case inside arranges n level dividing plate, every two adjacent separator at the top of surface settlement case inside, bottom interlaced arrangement, form the sedimentation of n/2 level, mixed liquor flows along S type track after entering surface settlement case; The bottom blow-down district of described surface settlement case is pyramidal structure, and sewage draining exit is at taper lowermost end.
The utility model has the advantages that:
1, CBM Drainage water system provided by the utility model, what this system adopted provides high voltage power liquid by high pressure water-injection pump, open downhole jet pump make its suck formation water mix with power fluid after discharge, without any mechanical movement in whole work process, realized by hydraulic control, can not eccentric wear be caused, oil pipe application life can be extended.
2, the utility model downhole jet pump utilizes power fluid tubing string to mount under lower going-into-well, compares retrievable type pump reliability strong.
3, the utility model due between system and down-hole pump assembly without any mechanical moving element, and coal dust in screen casing formation water is housed bottom has filtration, therefore can not pile up because of long-time coal dust and cause holddown, cause systemic breakdown to quit work, decrease repair time and cost.
4, the utility model surface settlement case has n level decanting zone, S type flow trace, and bottom blow-down district is pyramidal structure, and sewage draining exit, can more effective eliminating dirt at taper lowermost end.
Accompanying drawing explanation
Fig. 1 is the structure diagram of the utility model CBM Drainage water system;
Fig. 2 is the structure diagram of downhole jet pump.
Reference numeral is as follows:
1-high pressure water-injection pump, 2-surface settlement case, 3-wellhead tree is set, 4-surface line, 5-measuring instrument; 6-power fluid tubing string, 7-downhole jet pump, the setting device of 8-, 9-screen casing, 10-outer working tube, 11-mixed liquor tubing string, 12-top connection, 13-nozzle, 14-mixing tube, 15-trunnion, 16-anemostat, 17-passes in and out joint, 18-one way valve, the setting base of 19-, the setting leather cup of 20-pump barrel, 21-, 22-dividing plate, 23-sewage draining exit, 24-ground installation, 25-underground equipment.
Detailed description of the invention
See Fig. 1, the utility model provides a kind of novel coal bed gas drainage system, comprises ground installation, wellhead tree tree and underground equipment;
Wherein, ground installation 24 comprises high pressure water-injection pump 1, surface settlement case 2;
Underground equipment 25 comprises power fluid tubing string 6, mixed liquor tubing string 11, downhole jet pump 7, setting device 8 and screen casing 9;
Concrete annexation is:
The water inlet of high pressure water-injection pump 1 is communicated with the delivery port of surface settlement case 2; The delivery port of high pressure water-injection pump 1 is communicated with power fluid tubing string 6 water inlet by wellhead tree tree 3; The delivery port of power fluid tubing string 6 is communicated with downhole jet pump 7, thus forms power fluid circulation passage;
The lower end of downhole jet pump 7 connects one way valve 18, setting device 23 and screen casing 9 successively; Setting device 23 is by formation water and mixed liquor passageway break; Screen casing 9 is positioned at formation water;
Mixed liquor tubing string 11 is sleeved on the outside of power fluid tubing string 6; Mixed liquor passage is formed between the inwall of mixed liquor tubing string 11 and the outer wall of power fluid tubing string 6; Mixed liquor passage is communicated with the water inlet of surface settlement case 2 by wellhead tree tree 3;
It should be noted that: this downhole jet pump 7 comprises top connection 12, nozzle 13, mixing tube 14, trunnion 15, anemostat 16, turnover joint 17, one way valve 18, setting device 23, pump barrel 20; Wherein, one way valve peace 18 is arranged in the pump barrel 20 of downhole jet pump, and connect into as a whole with downhole jet pump, in work progress, one way valve implants down-hole together with downhole jet pump, simplifies the step of construction, saves a large amount of time and manpower.
In addition, the setting device 23 of the application specifically comprises setting base 19 and setting leather cup 21; Setting base 19 is arranged on the lower end of one way valve 18; Setting leather cup 21 is arranged on setting base 19.Setting device 23 installs the bottom of downhole jet pump 7, greatly increases the reliability of downhole jet pump location.
As shown in Figure 2, the annexation that downhole jet pump is concrete is:
The connection of top connection 12 and pump barrel 20 upper end, nozzle 13, mixing tube 14, trunnion 15, anemostat 16, turnover joint 17 connect successively from top to bottom and are positioned at the inside of pump barrel 20; One end of one way valve 18 is connected with the lower end of pump barrel 20, the other end is connected with setting base 19; Setting leather cup 21 is arranged on setting base 19.
The downhole jet pump that the application uses and one way valve connect into as a whole, work under lower going-into-well together, decrease the step of construction, saved the time during construction operation.
In addition, setting base 19 is arranged on the below of one way valve 18, and that is the downhole jet pump 7 of the application carries out setting (location) downhole jet pump 7 in the position near shaft bottom, ensure that the reliability that downhole jet pump is gone into the well when locating.
More reliable in order to ensure recycling of power fluid and mixed liquor, between the water inlet of the high pressure water-injection pump 1 of the application and the delivery port of surface settlement case 2, high pressure water-injection pump 1 delivery port sets between 3 with wellhead tree and wellhead tree is set between 3 and the water inlet of surface settlement case 2 and all adopted surface line 4 to be connected; And surface line 4 adopts stainless steel seamless pipe to make.
In order to measure the flow of power fluid and mixed liquor and regulate, the application has installed measuring instrument 5 on each surface line, and this measuring instrument generally selects flow meter to record flow, and employing control valve regulates the flow by surface line.
What needs further illustrated is, in order to more effectively remove the impurity in mixed liquor: surface settlement case 2 inside in this system arranges n level dividing plate 22, every two adjacent separator at the top of surface settlement case inside, bottom interlaced arrangement, flow along S type track after making mixed liquor enter surface settlement case, thus form the sedimentation of n/2 level, the bottom blow-down district of surface settlement case is pyramidal structure, and sewage draining exit 23, at taper lowermost end, is convenient to blowdown.
The specific works process of native system is:
Pressurization in mixed liquor suction pump after the sedimentation of surface settlement case is formed high voltage power liquid by high pressure water-injection pump; High voltage power liquid transfers in downhole jet pump through wellhead tree tree, power fluid tubing string successively; Downhole jet pump is injected in pump by high voltage power liquid and forms negative pressuren zone, relies on negative pressure, and open one way valve and suck formation water, formation water, in suction down-hole pump assembly process, needs the filtration through screen casing assembly, filters out most coal dust.Under suction well, the formation water of pump assembly and power fluid are mixed into mixed liquor, discharge outside down-hole pump assembly, and after outer working tube, mixed liquor tubing string, arrive ground flow tank successively, after the sedimentation of mixed liquor n level is made the abundant sedimentation of coal dust by surface settlement case, taken away by high pressure water-injection pump again, carry out the circulation of next time.
Claims (6)
1. a CBM Drainage water system, is characterized in that: comprise ground installation, underground equipment and wellhead tree tree;
Described ground installation comprises high pressure water-injection pump, surface settlement case;
Described underground equipment comprises power fluid tubing string, mixed liquor tubing string, downhole jet pump, one way valve, setting device and screen casing;
The water inlet of described high pressure water-injection pump is communicated with the delivery port of surface settlement case; The delivery port of described high pressure water-injection pump is communicated with power fluid tubing string water inlet by wellhead tree tree; The delivery port of described power fluid tubing string is communicated with downhole jet pump upper end, power fluid circulation passage;
Described mixed liquor tubing string is sleeved on the outside of power fluid tubing string; Mixed liquor passage is formed between the inwall of described mixed liquor tubing string and the outer wall of power fluid tubing string; Described mixed liquor passage is communicated with the water inlet of surface settlement case by wellhead tree tree;
The lower end of described downhole jet pump connects one way valve, setting device and screen casing successively; Described setting device is by formation water and mixed liquor passageway break; Described screen casing is positioned at formation water.
2. CBM Drainage water system according to claim 1, is characterized in that: described one way valve is arranged in the pump barrel of downhole jet pump, connects into as a whole with downhole jet pump.
3. CBM Drainage water system according to claim 1 and 2, is characterized in that: described setting device comprises setting base and setting leather cup; Described setting floor installation is in the lower end of one way valve; Described setting leather cup is arranged on setting base.
4. CBM Drainage water system according to claim 3, is characterized in that: between the water inlet of high pressure water-injection pump and the delivery port of surface settlement case, high pressure water-injection pump delivery port set with wellhead tree between and wellhead tree set and all adopt surface line to be connected between the water inlet of surface settlement case; Described surface line adopts stainless steel seamless pipe to make.
5. CBM Drainage water system according to claim 4, is characterized in that: described surface line is provided with measuring instrument; Described measuring instrument comprises for regulating the control valve of displacement and the flow meter for measuring displacement.
6. CBM Drainage water system according to claim 5, it is characterized in that: described surface settlement case inside arranges n level dividing plate, every two adjacent separator at the top of surface settlement case inside, bottom interlaced arrangement, form the sedimentation of n/2 level, mixed liquor flows along S type track after entering surface settlement case; The bottom blow-down district of described surface settlement case is pyramidal structure, and sewage draining exit is at taper lowermost end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520444364.9U CN204851187U (en) | 2015-06-25 | 2015-06-25 | Coal bed gas drainage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520444364.9U CN204851187U (en) | 2015-06-25 | 2015-06-25 | Coal bed gas drainage system |
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| Publication Number | Publication Date |
|---|---|
| CN204851187U true CN204851187U (en) | 2015-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520444364.9U Active CN204851187U (en) | 2015-06-25 | 2015-06-25 | Coal bed gas drainage system |
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| CN (1) | CN204851187U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821425A (en) * | 2019-12-31 | 2020-02-21 | 中国石油大学(华东) | Coal-bed gas well wall cleaning equipment and circulating well cleaning method |
| CN112774289A (en) * | 2019-11-07 | 2021-05-11 | 中国石油天然气股份有限公司 | Filter equipment and arrange and adopt system |
-
2015
- 2015-06-25 CN CN201520444364.9U patent/CN204851187U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112774289A (en) * | 2019-11-07 | 2021-05-11 | 中国石油天然气股份有限公司 | Filter equipment and arrange and adopt system |
| CN110821425A (en) * | 2019-12-31 | 2020-02-21 | 中国石油大学(华东) | Coal-bed gas well wall cleaning equipment and circulating well cleaning method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |