CN105401915A - Downlink borehole drainage method and device - Google Patents
Downlink borehole drainage method and device Download PDFInfo
- Publication number
- CN105401915A CN105401915A CN201511007233.5A CN201511007233A CN105401915A CN 105401915 A CN105401915 A CN 105401915A CN 201511007233 A CN201511007233 A CN 201511007233A CN 105401915 A CN105401915 A CN 105401915A
- Authority
- CN
- China
- Prior art keywords
- extraction
- drainage tube
- pipe
- drainage
- screen casing
- 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.)
- Granted
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
Abstract
The invention discloses a downlink borehole drainage method and device. To put it simply, an extraction system, a gas supply system and a drainage system share a single extraction pipe (2). The extraction pipe (2) comprises an extraction solid tube (2-2) and an extraction sieve tube (2-3), wherein a separation strip (2-1) is arranged between the extraction solid tube (2-2) and the extraction sieve tube (2-3). Through controlling the extraction pipe (2) by different valves, the functions of gas extraction and drainage are realized. According to the technical scheme of the invention, the problem that water accumulates in a borehole due to the existence of fissure water during the wet drilling process so as to affect the gas extraction effect can be solved. Meanwhile, the problems that the extraction area of the solid tube is relatively small and the plugging phenomenon is easily caused by the sieve tube are also solved. The extraction effect is further improved.
Description
Technical field
To the present invention relates under one to boring water discharge method and device, be applicable to the mash gas pumping drilling field of easy collapse hole.
Background technology
In process of coal mining, projecting coal bed for complicated geology, needs to arrange that lower perform hole carries out gas pumping, owing to adopting wet type punching and there is crevice water etc., causes in boring and there is ponding, affect gas pumping effect; Meanwhile, gas pumping pipe is as adopted real pipe, and extraction area is less, and as adopted screen casing, because ponding invades bubble, drill hole wall is soft to be caving, and blocks the screen casing goed deep at the bottom of hole, causes extracting result poor.
Summary of the invention
, when adopting wet type punching to solve and there is the situations such as crevice water, there is ponding in the boring caused, affect the problem of gas pumping effect in the technical problem to be solved in the present invention: provide a kind of descending extraction borehole water discharge method and device; Meanwhile, overcome and adopt real pipe extraction extraction area less and adopt screen casing susceptible to plugging problem, improve extracting result further.
Technical scheme of the present invention is:
A kind of descending boring water discharge method, extraction system, air supply system and drainage system share a drainage tube.Three systems share a drainage tube and have the following advantages, and are first easy for installation, in each mounting pipe subprocess, only need installation pipe just can realize draining and air supply system; Simultaneously, can ensure gas extraction flow again, in extraction negative pressure one timing, extraction caliber is larger, gas extraction flow will be larger, and this adopts the many pipelines institute effect that is beyond one's reach (many pipelines insert boring simultaneously must consider that mutual installation affects).
Drainage tube comprises the extraction screen casing of the real pipe of the extraction being positioned at top and below, is provided with dividing strip between the two.Drainage tube is divided into the real pipe of extraction and extraction screen casing by the dividing strip of drainage tube inside, and wherein the real pipe of extraction is positioned at top, and extraction screen casing is positioned at bottom.Here upper and lower is for the using state of drainage tube, even if the used time, vertically, the extraction screen section in drainage tube is positioned at the below of the real tube portion of extraction.
The cross sectional shape prioritizing selection of drainage tube is circular, and other shapes are also passable, but will ensure that the real pipe on top effectively can prevent from can not blocking when holing collapse hole the aperture on screen casing surface.
The real pipe range of extraction is in extraction screen casing, and namely the end of the real pipe of extraction will exceed end one segment distance of extraction screen casing.Its effect of this part grown is similar to the brim of a hat of cap, effectively can block the stone dropped from boring, prevents the terminal surface opening of its blocking extraction screen casing, also can effectively prevent the opening of the real pipe terminal surface of extraction blocked.
Extraction screen casing surface is covered with irregular holes, the distribution of irregular holes and quantity, to ensure that the gas in boring enters in drainage tube fast as principle is determined.
Described extraction system is made up of drainage tube and extraction valve, and drainage tube is connected with extraction negative pressure line.
Described air supply system is made up of air supply pipe, air-supplying valve, drainage tube, and air supply pipe is connected with high-pressure gas pipeline.
Described drainage system is made up of gutter, water discharging valve, drainage tube.
The present invention in use, opens the extraction valve on drainage tube, closes the air-supplying valve on air supply pipe and the water discharging valve on gutter, under suction function, can realize the normal extraction of gas; Close the extraction valve on drainage tube, open the water discharging valve on gutter and the air-supplying valve on air supply pipe, introduce gases at high pressure, the ponding in boring is discharged outside boring by gutter; Apparatus of the present invention are simple, use reliable, convenient and quick construction, solve and adopt wet type punching and there is crevice water etc., cause in boring and there is ponding, affect gas pumping effect; Meanwhile, gas pumping pipe is as adopted real pipe, and extraction area is less, and as adopted screen casing, because ponding invades bubble, drill hole wall is soft to be caving, and blocks the screen casing that gos deep at the bottom of hole, the problem such as cause extracting result poor.
Accompanying drawing explanation
Fig. 1 apparatus of the present invention schematic side view;
Fig. 2 apparatus of the present invention A-A generalized section.
Detailed description of the invention
As illustrated in fig. 1 and 2, a kind of descending boring dewatering installation, comprises extraction system, air supply system, drainage system, and three shares a drainage tube 2.
Extraction system is made up of drainage tube 2 and extraction valve 5, and drainage tube 2 is connected with extraction negative pressure line.
Drainage system is made up of gutter 3, water discharging valve 6, drainage tube 2.
Air supply system is made up of air supply pipe 4, air-supplying valve 7, drainage tube 2, and gas manifold 4 is connected with high-pressure gas pipeline.
There is dividing strip 2-1 drainage tube 2 inside, and drainage tube 2 is divided into the real pipe 2-2 and extraction screen casing 2-3 of extraction by it, and wherein the real pipe 2-2 of extraction is positioned at top, and extraction screen casing 2-3 is positioned at bottom.
Extraction real pipe 2-2 end is longer than extraction screen casing 2-3.
Extraction screen casing 2-3 surface is covered with irregular holes.
Open the extraction valve 5 on drainage tube 2, close the air-supplying valve 7 on air supply pipe 4 and the water discharging valve 6 on gutter 3, under suction function, the normal extraction of gas can be realized; Close the extraction valve 5 on drainage tube 2, open the water discharging valve 6 on gutter 3 and the air-supplying valve 7 on air supply pipe 4, gases at high pressure enter in boring 1 by extraction screen casing 2-3, and the ponding bottom boring 1 is discharged outside boring 1 by the real pipe 2-2 of extraction.
Claims (4)
1. a descending boring water discharge method, is characterized in that: extraction system, air supply system and drainage system share a drainage tube (2).
2. implement the drainage tube of a kind of descending boring water discharge method as claimed in claim 1, it is characterized in that: drainage tube (2) comprises the extraction screen casing (2-3) of the real pipe (2-2) of the extraction being positioned at top and below, is provided with dividing strip (2-1) between the two.
3. a kind of drainage tube according to claim 2, is characterized in that: the real pipe (2-2) of extraction is longer than extraction screen casing (2-3).
4. a kind of drainage tube according to claim 3, is characterized in that: extraction screen casing (2-3) surface is covered with irregular holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511007233.5A CN105401915B (en) | 2015-12-30 | 2015-12-30 | A kind of downlink drilling water discharge method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511007233.5A CN105401915B (en) | 2015-12-30 | 2015-12-30 | A kind of downlink drilling water discharge method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105401915A true CN105401915A (en) | 2016-03-16 |
| CN105401915B CN105401915B (en) | 2019-03-01 |
Family
ID=55467630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511007233.5A Active CN105401915B (en) | 2015-12-30 | 2015-12-30 | A kind of downlink drilling water discharge method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105401915B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4343696A (en) * | 1981-02-03 | 1982-08-10 | Hung Pai Yen | System for removing sludge from dam reservoir |
| CN101649740A (en) * | 2009-09-03 | 2010-02-17 | 周福宝 | Ground bored well body structure for gas extraction |
| CN203145996U (en) * | 2013-02-28 | 2013-08-21 | 山西潞安环保能源开发股份有限公司 | Downward wet hole drainage |
| CN105114119A (en) * | 2015-08-21 | 2015-12-02 | 贵州大学 | Improved gas extraction structure adopting downward hole drainage and implementation method thereof |
-
2015
- 2015-12-30 CN CN201511007233.5A patent/CN105401915B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4343696A (en) * | 1981-02-03 | 1982-08-10 | Hung Pai Yen | System for removing sludge from dam reservoir |
| CN101649740A (en) * | 2009-09-03 | 2010-02-17 | 周福宝 | Ground bored well body structure for gas extraction |
| CN203145996U (en) * | 2013-02-28 | 2013-08-21 | 山西潞安环保能源开发股份有限公司 | Downward wet hole drainage |
| CN105114119A (en) * | 2015-08-21 | 2015-12-02 | 贵州大学 | Improved gas extraction structure adopting downward hole drainage and implementation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105401915B (en) | 2019-03-01 |
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