CN107387023A - A kind of new dredger and method for well fixing applied to L-type horizontal well - Google Patents
A kind of new dredger and method for well fixing applied to L-type horizontal well Download PDFInfo
- Publication number
- CN107387023A CN107387023A CN201710639128.6A CN201710639128A CN107387023A CN 107387023 A CN107387023 A CN 107387023A CN 201710639128 A CN201710639128 A CN 201710639128A CN 107387023 A CN107387023 A CN 107387023A
- Authority
- CN
- China
- Prior art keywords
- well
- end oil
- plain end
- oil well
- well pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
Abstract
The invention belongs to coal bed gas workover process technical field, specifically a kind of new dredging and method for well fixing applied to L-type horizontal well.A kind of effect is provided to become apparent and lower-cost new method for well fixing, including supercharging equipment, liquid nitrogen pump vehicle, plain end oil well pipe and the high pressure line being connected with horizontal well, described liquid nitrogen pump vehicle is connected with supercharging equipment by high pressure line, supercharging equipment is connecting plain end oil well pipe by high pressure line, and plain end oil well pipe is extended into horizontal well.A diameter of 60mm of plain end oil well pipe, plain end oil well pipe bottom are tail band nib structure.The present invention more effectively improves production effect compared to more traditional workover process, reduces the fault rate in machine and well.
Description
Technical field
The invention belongs to coal bed gas workover process technical field, specifically a kind of new dredging applied to L-type horizontal well
And method for well fixing.
Background technology
Coal bed gas well well workover generally in a manner of water flushing.Water flushing is by well-flushing by horizontal segment production casing
Coal dust and fracturing sand clear as far as possible, straight well is fully linked up with inclined shaft.According to the particularity of horizontal segment, structure is answered
From the point of view of polygamy, husky and coal dust impurity power tool is dragged in work progress and is difficult to enter well from horizontal segment, upper lower tubular column resistance, is rubbed
Power increase is wiped, surface torque, pulling force are larger, and horizontal segment easily forms sand bed, and inclination section easily forms husky bridge.According to conventional with clear
The experience of well is washed, 1 mouthful of well, which is washed, at least needs thousands of Fang Shui, only draws water cost with regard to considerable, and using clear
Water operation effectiveness is poor, and the big liquid level of water declines slow in original well, and aerogenesis is ineffective, if a large amount of water fillings into well again, is undoubtedly
Make the matter worse, have a strong impact on gas production, at the same a large amount of water fillings to mine safety also with the presence of certain hidden danger.In this case,
We need research effect to become apparent and lower-cost new workover process.Coal and coal bed gas Gong Cai National Key Laboratories
Develop correlation technique.
The content of the invention
The present invention becomes apparent and lower-cost new method for well fixing to solve effect, there is provided one kind is applied to L-type
The new dredging of horizontal well and method for well fixing.
The present invention takes following technical scheme：A kind of new dredger applied to L-type horizontal well, including with horizontal well
Supercharging equipment, liquid nitrogen pump vehicle, plain end oil well pipe and the high pressure line of connection, described liquid nitrogen pump vehicle pass through high pressure with supercharging equipment
Pipeline connects, and supercharging equipment is connecting plain end oil well pipe by high pressure line, and plain end oil well pipe is extended into horizontal well.Plain end oil well pipe
A diameter of 60mm, plain end oil well pipe bottom are tail band nib structure.
A kind of method for well fixing of new dredger applied to L-type horizontal well, is comprised the following steps that,
（1）Water is blown out ground by lower 60mm plain end oil well pipe tail band nibs to corresponding roof above 1m；
（2）Using the method for segmentation well-flushing, using 20m as one section, coal dust Air blowing ground in Jiang Shui and well, as delivery port goes out
Sand and powder amount are smaller, then increase the spacing transferred every time, if being hampered in decentralization process, stop decentralization, directly rinse；Rinse
Process injects gas, circulation well cleanup, so repeatedly, under into well using liquid nitrogen pump vehicle pumping nitrogen by supercharging equipment
Put depth to from cannula end 3m to stop, must not exceed 3m.
The present invention by into horizontal well gas injection coal seam is acted on by the power of continuation, can will by gas circulation
The coal dust, rock dust etc. of alluvial and water take well head out of together in well.
Compared with prior art, the invention has the advantages that：
（1）Using water wisely cost of the present invention.
（2）The present invention more effectively improves production effect compared to more traditional workover process, reduces the failure in machine and well
Rate.
（3）Security performance of the present invention is high, should not cause mine water disaster.
（4）The present invention reduces the injury that fluid column is brought to reservoir in well.
（5）Invention increases gas production.
Brief description of the drawings
Fig. 1 is new dredging and the workover process schematic diagram of L-type horizontal well；
Fig. 1-liquid nitrogen pump vehicle, 2- high pressure line, 3-4- supercharging equipments.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in figure 1, a kind of new dredger applied to L-type horizontal well, including the supercharging being connected with horizontal well are set
Standby 3, liquid nitrogen pump vehicle 1, plain end oil well pipe 4 and high pressure line 2, described liquid nitrogen pump vehicle 1 pass through high pressure line 2 with supercharging equipment 3
Connection, supercharging equipment 3 are connecting plain end oil well pipe 4 by high pressure line 2, and plain end oil well pipe 4 is extended into horizontal well.Plain end oil well pipe 4
A diameter of 60mm, the bottom of plain end oil well pipe 4 is tail band nib structure.
A kind of method for well fixing of new dredger applied to L-type horizontal well, is comprised the following steps that,
（1）Water is blown out ground by lower 60mm plain end oil well pipe tail band nibs to corresponding roof above 1m.
（2）Using the method for segmentation well-flushing, using 20m as one section, coal dust Air blowing ground in Jiang Shui and well, such as water outlet
Mouth shakes out smaller with powder amount, then increases the spacing transferred every time, if being hampered in decentralization process, stops decentralization, directly flushing；
Flushing process injects gas into well using liquid nitrogen pump vehicle pumping nitrogen by supercharging equipment, circulation well cleanup, so repeatedly, directly
Stop to decentralization depth to from cannula end 3m, must not exceed 3m.
It should be noted that in work progress of the present invention：
（1）Liquid nitrogen pump vehicle, supercharging equipment must be provided with special relief valve, must first be unloaded before dismounting air inlet is finished per subjob
Pressure.
（2）The gas transmission high pressure line of connection liquid nitrogen pump vehicle, supercharging equipment and well head must is fulfilled for construction intensity.
（3）In addition to necessary operating personnel, liquid nitrogen pump vehicle, supercharging equipment and well head nearby forbid the people that stands for gas injection, release,
Delivery port nearby forbids the people that stands.
（4）Well head must install 250 standard well heads, and construction every time will check the fine status of well head, serious wear after terminating
When to change in time.
（5）Gas transmission, water outlet pipeline use elbow less as far as possible, must such as use the special after each end of job of elbow
The abrasion condition of elbow Zhu Yi not be checked, once finding leakage, stops operation changed immediately.
（6）Water outlet pipeline bore is greater than well head outlet bore, and one goes out well head and strains into heavy-caliber pipeline in principle, use
To reduce mill resistance and reduce flow velocity.
（7）Delivery port pipeline at least two above earth anchorage（Earth anchor length cannot be less than 1m）.
（8）Special gas management equipment detection delivery port gas density must be used after each end of job, concentration is 2%
Mechanical normal operation can be started below, otherwise must not be constructed.
（9）Daily construction must carry flow string in well more than supreme group of coal roof before terminating, and avoid for a long time
It is parked in horizontal segment and sand occurs and buries.
（10）During construction, personnel must be away from higher-pressure region during construction, and No Open Flames in construction area.
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art,
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacing, within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., this should be included in
Within the protection domain of invention.
Claims (3)
- A kind of 1. new dredger applied to L-type horizontal well, it is characterised in that：Including the supercharging equipment being connected with horizontal well （3）, liquid nitrogen pump vehicle（1）, plain end oil well pipe（4）And high pressure line（2）, described liquid nitrogen pump vehicle（1）With supercharging equipment（3）Pass through High pressure line（2）Connection, supercharging equipment（3）Passing through high pressure line（2）Connect plain end oil well pipe（4）, plain end oil well pipe（4）Extend into In horizontal well.
- 2. the new dredger according to claim 1 applied to L-type horizontal well, it is characterised in that：Plain end oil well pipe（4） A diameter of 60mm, plain end oil well pipe（4）Bottom is tail band nib structure.
- 3. a kind of method for well fixing of the new dredger as claimed in claim 2 applied to L-type horizontal well, its feature exist In：Comprise the following steps that,（1）Water is blown out ground by lower 60mm plain end oil well pipe tail band nibs to corresponding roof above 1m；（2）Using the method for segmentation well-flushing, using 20m as one section, coal dust Air blowing ground in Jiang Shui and well, as delivery port goes out Sand and powder amount are smaller, then increase the spacing transferred every time, if being hampered in decentralization process, stop decentralization, directly rinse；Rinse Process injects gas, circulation well cleanup, so repeatedly, under into well using liquid nitrogen pump vehicle pumping nitrogen by supercharging equipment Put depth to from cannula end 3m to stop, must not exceed 3m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710639128.6A CN107387023A (en) | 2017-07-31 | 2017-07-31 | A kind of new dredger and method for well fixing applied to L-type horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710639128.6A CN107387023A (en) | 2017-07-31 | 2017-07-31 | A kind of new dredger and method for well fixing applied to L-type horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107387023A true CN107387023A (en) | 2017-11-24 |
Family
ID=60341357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710639128.6A Pending CN107387023A (en) | 2017-07-31 | 2017-07-31 | A kind of new dredger and method for well fixing applied to L-type horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107387023A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138831A (en) * | 2018-09-30 | 2019-01-04 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of fire-extinguishing integrated technique of New well drilling applied to mine fire rescue |
| CN109723399A (en) * | 2018-12-24 | 2019-05-07 | 中国矿业大学 | A kind of method of oil/gas well liquid nitrogen injection de-plugging anatonosis |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587634A (en) * | 2004-08-18 | 2005-03-02 | 中国石油天然气集团公司 | Compressed air circulation sand cleaning process and matching device |
| CN202157771U (en) * | 2011-07-25 | 2012-03-07 | 中国石油天然气股份有限公司 | Spot liquid nitrogen evaporation low-density foam well washing system |
| CN105507871A (en) * | 2016-01-06 | 2016-04-20 | 西南石油大学 | Horizontal well liquid nitrogen ice crystal temperature plugging staged fracturing method for coalbed methane |
| CN106703772A (en) * | 2016-12-01 | 2017-05-24 | 中国神华能源股份有限公司 | Coal seam gas channel dredge method and coal seam gas channel dredge device |
-
2017
- 2017-07-31 CN CN201710639128.6A patent/CN107387023A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587634A (en) * | 2004-08-18 | 2005-03-02 | 中国石油天然气集团公司 | Compressed air circulation sand cleaning process and matching device |
| CN202157771U (en) * | 2011-07-25 | 2012-03-07 | 中国石油天然气股份有限公司 | Spot liquid nitrogen evaporation low-density foam well washing system |
| CN105507871A (en) * | 2016-01-06 | 2016-04-20 | 西南石油大学 | Horizontal well liquid nitrogen ice crystal temperature plugging staged fracturing method for coalbed methane |
| CN106703772A (en) * | 2016-12-01 | 2017-05-24 | 中国神华能源股份有限公司 | Coal seam gas channel dredge method and coal seam gas channel dredge device |
Non-Patent Citations (2)
| Title |
|---|
| 李宗源等: "煤层气可控水平井洗井工艺技术研究与应用", 《中国煤层气》 * |
| 闫琪等: "连续油管在延安气田水平井井筒清理中的应用", 《石化技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138831A (en) * | 2018-09-30 | 2019-01-04 | 山西晋城无烟煤矿业集团有限责任公司 | A kind of fire-extinguishing integrated technique of New well drilling applied to mine fire rescue |
| CN109723399A (en) * | 2018-12-24 | 2019-05-07 | 中国矿业大学 | A kind of method of oil/gas well liquid nitrogen injection de-plugging anatonosis |
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Application publication date: 20171124 |
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| RJ01 | Rejection of invention patent application after publication |