CN106894785A - Easy gushing water coal seam upward hole gas pressure measurement method - Google Patents
Easy gushing water coal seam upward hole gas pressure measurement method Download PDFInfo
- Publication number
- CN106894785A CN106894785A CN201710139862.6A CN201710139862A CN106894785A CN 106894785 A CN106894785 A CN 106894785A CN 201710139862 A CN201710139862 A CN 201710139862A CN 106894785 A CN106894785 A CN 106894785A
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- Prior art keywords
- pipe
- drilling
- sleeve
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- 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.)
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- 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
- E21B43/10—Setting of casings, screens, liners or the like in 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
The present invention proposes a kind of easy gushing water coal seam upward hole gas pressure measurement method, solves the problems, such as that easy gushing water determination of coal seam gas pressure is combined with anti-gushing water in the prior art.The present invention comprises the following steps：The first drilling is opened in palisades with the first drill bit, one-level sleeve pipe is installed in the first drilling, blocked the space in the space between one-level sleeve outer wall and palisades and one-level sleeve pipe using cement mortar；After after cement mortar solidification, the second drilling is opened using the second drill bit to stop drilling to coal petrography junction, two grades of sleeve pipes are installed in the second drilling, the space in the space between one-level internal surface of sleeve pipe and two grades of sleeve outer walls and two grades of sleeve pipes is blocked using cement mortar；After after cement mortar solidification, the 3rd drilling is opened using the 3rd drill bit, the 3rd drills through coal seam, sealing of hole space is reserved between the 3rd drilling and the second sleeve pipe.The present invention uses Double-sleeve, and more favourable control gushing water situation, good sealing effect, piezo-effect is good.
Description
Technical field
The present invention relates to gas pressure measurement, a kind of easy gushing water coal seam upward hole gas pressure measurement method is particularly related to.
Background technology
At present, there is the possibility of gushing water in easy gushing water coal seam at any time during drilling, in order to prevent water leak accident, in drilling
Corresponding safeguard procedures are taken before seeing coal, once there is gushing water, can be controlled in time.For high methane and projecting mine,
To understand region gas situation, gas pressure must be measured according to relevant regulations.Therefore easily gushing water coal seam is in measure watt
During this pressure, to combine with anti-gushing water, coal-bed gas pressure should be determined, the generation of water inrush accident is prevented again.
The content of the invention
The present invention proposes a kind of easy gushing water coal seam upward hole gas pressure measurement method, solves easy gushing water in the prior art
The problem that determination of coal seam gas pressure is combined with anti-gushing water.
The technical proposal of the invention is realized in this way, a kind of easy gushing water coal seam upward hole gas pressure measurement method, bag
Include following steps：
Step one：The first drilling is opened in palisades with the first drill bit, one-level sleeve pipe is installed in the first drilling, will using cement mortar
The space in space and one-level sleeve pipe between one-level sleeve outer wall and palisades is blocked；
Step 2：After after cement mortar solidification in step one, the second drilling is opened using the second drill bit and stops beating to coal petrography junction
Bore, two grades of sleeve pipes are installed in the second drilling, using cement mortar by the sky between one-level internal surface of sleeve pipe and two grades of sleeve outer walls
Space in gap and two grades of sleeve pipes is blocked；
Step 3：After after cement mortar solidification in step 3, the 3rd drilling is opened using the 3rd drill bit, the 3rd drills through coal seam,
Sealing of hole space is reserved between the 3rd drilling and the second sleeve pipe；
Step 4：The screen casing that gauze will be tied up fills in the 3rd drilling, and the entity pipe that there is baffle plate front end is connected with screen casing, baffle plate week
Winding cotton yarn is enclosed, subsequent entity pipe is connected by root, and polyurethane is bound on an entity pipe in the second sleeve pipe pipe, in two grades of sets
Polyurethane is bound on a piece entity pipe of the pipe mouth of pipe, in two grades of the sleeve pipe mouths of pipe placement Grouting Pipe and return pipes, Grouting Pipe passes through pipe
The polyurethane of mouth, return pipe passes through the polyurethane of the mouth of pipe and extends at the polyurethane in pipe, and the polyurethane at the mouth of pipe fills in Huang
Mud, and stopper yellow mud with timber wedge；
Step 5：After after yellow mud consolidation, by Grouting Pipe to carrying out slip casting between two polyurethane, after return pipe backflow, slip casting
Terminate；
Step 6：Entity pipe is connected with threeway, stop valve and pressure gauge is arranged in threeway, complete the work of pressure measurement sealing of hole,
Finally determine gas pressure.
Every two meters of described entity pipe sets one, and connection is tightly wrapped with raw material band between two adjacent entity pipes.
The present invention is combined easy gushing water determination of coal seam gas pressure with anti-gushing water, and using Double-sleeve, more favourable control is prominent
Regimen condition, certain space is stayed in aperture, and aperture is sealed jointly with yellow mud and timber wedge and polyurethane, and good sealing effect is achieved
Preferable piezo-effect.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is present invention drilling and sleeve structure schematic diagram.
Fig. 2 is piezometry structural representation of the present invention.
In figure：1- first drills, and 2- one-level sleeve pipes, 3- second drills, bis- grades of sleeve pipes of 4-, and 5- the 3rd drills, 6- palisades, 7-
Cement mortar, 8- coal seams；
11- stop valves, 12- pressure gauges, 13- threeways, 14- Grouting Pipes, 15- return pipes, 16- yellow mud, 17- timber wedges, the poly- ammonia of 18-
Ester, 110- baffle plates, bis- grades of casing walls of 111-, 112- gauzes, 113- screen casings, 115- entity pipes.
Specific 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 is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not paid
Embodiment, belongs to the scope of protection of the invention.
The present invention proposes a kind of easy gushing water coal seam upward hole gas pressure measurement method, comprises the following steps：
Step one：The first drilling 1 is opened in palisades 6 with the first drill bit, one-level sleeve pipe 2 is installed in the first drilling 1, using cement bonded sand
Slurry 7 is blocked the space in the space between the outer wall of one-level sleeve pipe 2 and palisades 6 and one-level sleeve pipe 2；
Step 2：After after the solidification of cement mortar in step one 7, the second drilling 3 to coal petrography junction is opened using the second drill bit and is stopped
Drill, two grades of sleeve pipes 4 be installed in the second drilling 3, using cement mortar 7 by the inwall of one-level sleeve pipe 2 and two grades of outer walls of sleeve pipe 4 it
Between space and the space in two grades of sleeve pipes 4 blocked；
Step 3：After after the solidification of cement mortar in step 27, the 3rd drilling 5 is opened using the 3rd drill bit, the 3rd drilling 5 passes through coal
Layer 8, sealing of hole space is reserved between the 3rd drilling 5 and the second sleeve pipe 4；
Step 4：The screen casing 113 that gauze 112 will be tied up fills in the 3rd drilling 5, the entity pipe 115 and sieve that front end is had baffle plate 110
Pipe 113 is connected, and the surrounding of baffle plate 110 winding cotton yarn, subsequent entity pipe 115 is connected by root, an entity in the pipe of the second sleeve pipe 4
Polyurethane 18 is bound on pipe 115, polyurethane 18 is bound on two grades of entity pipes 115 of the mouth of pipe of sleeve pipe 4, in two grades of sleeve pipes 4
The mouth of pipe disposes Grouting Pipe 14 and return pipe 15, and Grouting Pipe 14 passes through the polyurethane 18 of the mouth of pipe, poly- ammonia of the return pipe 15 through the mouth of pipe
Ester 18 is simultaneously extended at the polyurethane 18 in pipe, and the polyurethane 18 at the mouth of pipe fills in yellow mud 16, and stoppers yellow mud 16 with timber wedge 17；
Step 5：After after the consolidation of yellow mud 16, slip casting is carried out by between two polyurethane 18 of Grouting Pipe 14 pair, return pipe 15 flows back
Afterwards, slip casting terminates；
Step 6：Entity pipe 115 is connected with threeway 13, stop valve 11 and pressure gauge 12 are arranged in threeway 13, complete to survey
Press seal hole works, and finally determines gas pressure.
15 every two meters described of entity pipe sets one, and connection is tightly wrapped with raw material band between two adjacent entity pipes 15.
Be exactly specifically, rig in place after, adjust design angle, as shown in figure 1, the first drill bit be D113 mm
Drill bit, opens the first drilling 1 to deep 10m with D113 mm drill bits first, and the one of the mm steels of D 108 is installed in the first drilling 1
Level sleeve pipe 2, sleeve pipe 1.5m mono-, by root connection, use cement mortar 7 by the space between the outer wall of one-level sleeve pipe 2 and palisades 6 with
And the space in one-level sleeve pipe 2 is blocked；
Second drill bit is D94 mm drill bits, after 24 hours cement mortar 7 solidify, the second drilling 3 is opened using D94 mm drill bits,
Stop drilling to coal petrography junction, two grades of sleeve pipes 4 of installation D89 mm steels in the second drilling 3, sleeve pipe 1.5m mono-, by
Root is connected, using cement mortar 7 by the space between the inwall of one-level sleeve pipe 2 and two grades of outer walls of sleeve pipe 4 and two grades of sleeve pipes 4
Space is blocked；
3rd drill bit is D75 mm drill bits, after 24 hours cement mortar 7 solidify, the 3rd drilling is opened using D75 mm drill bits
5, the 3rd drilling 5 passes through coal seam 8, if coal seam 8 is blocked up, the 3rd drilling 5 is at least stretched into more than coal seam 3m；
Can more effectively control gushing water using two grades of even Multi-stage sleeves, but from former method for sealing unlike, show sealing of hole be
Carried out after two grades of open-works of sleeve pipe 4, the plugging material of residual condenses not fully in sleeve pipe, less stable, and drilling is
Uphole, causes drilling to be difficult to obturage, easy spillage during slip casting, sealing of hole easy gas leakage after finishing, and causes gas pressure measurement to miss
Difference is larger.
As shown in Fig. 2 in the 3rd drilling 5 arrangement pressure testers, the screen casing 113 that gauze 112 will be tied up first fills in the
Three drillings 5, the surrounding gauze 112 of screen casing 113 is wound, and prevents ickings from blocking screen casing 113, and front end is had into baffle plate 110 and cotton is tied up
The entity pipe 115 of yarn is connected with screen casing 113, and baffle plate 110, the winding of the surrounding of baffle plate 110 are set between screen casing 113 and entity pipe 115
Cotton yarn, prevents slurries from entering screen casing 113, and entity pipe 115 is in charge of using four, every two meters one, between tightly wrap connection with raw material band；
At two grades of sleeve pipes 4 mouth of pipe 0.5m and 10m, the cotton yarn with polyurethane 18 is bound on entity pipe 115 and seals the 3rd
Drilling 5, before polyurethane 18 is set away from two grades of mouth of pipe 0.5m of sleeve pipe 4, disposes Grouting Pipe 14 and return pipe 15, and Grouting Pipe 14 is grown
Degree at overfall length of tube to two grades of mouth of pipe 10m of sleeve pipe 4, is filled in at two grades of mouth of pipe 0.5m of sleeve pipe 4 in two grades of mouths of pipe of sleeve pipe 4
Yellow mud 16, and stoppered with timber wedge 17, prevent the expansive force of polyurethane 18 from extruding yellow mud 16；
After after the consolidation of yellow mud 16, cement mortar 7 is injected by Grouting Pipe 14, after return pipe 15 flows back, slip casting terminates, and closes slip casting
Pipe 14 and return pipe 15；
The connection of entity pipe 115 threeway 13, pressure gauge 12 and stop valve 11, complete the work of pressure measurement sealing of hole.
Practice have shown that, for upward hole, because two grades of casing walls 11 are relatively slided, only in both sides polyurethane 18, middle slip casting
Method, easy spillage, gas leakage, it is necessary to which in aperture, yellow mud 16 is blocked, and just can guarantee that sealing quality.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (2)
1. a kind of easy gushing water coal seam upward hole gas pressure measurement method, it is characterised in that comprise the following steps：
Step one：With the first drill bit in palisades（6）Open the first drilling（1）, in the first drilling（1）Interior installation one-level sleeve pipe（2）, adopt
Use cement mortar（7）By one-level sleeve pipe（2）Outer wall and palisades（6）Between space and one-level sleeve pipe（2）Interior space is carried out
Closure；
Step 2：Treat cement mortar in step one（7）After solidification, the second drilling is opened using the second drill bit（3）To coal petrography junction
Stopping is drilled, in the second drilling（3）Two grades of sleeve pipes of interior installation（4）, using cement mortar（7）By one-level sleeve pipe（2）Inwall and two
Level sleeve pipe（4）Space and two grades of sleeve pipes between outer wall（4）Interior space is blocked；
Step 3：Treat cement mortar in step 3（7）After solidification, the 3rd drilling is opened using the 3rd drill bit（5）, the 3rd drilling（5）
Through coal seam（8）, in the 3rd drilling（5）With the second sleeve pipe（4）Between reserve sealing of hole space；
Step 4：Gauze will be tied up（112）Screen casing（113）Fill in the 3rd drilling（5）, there is into baffle plate front end（110）Entity
Pipe（115）With screen casing（113）Connection, baffle plate（110）Surrounding winding cotton yarn, subsequent entity pipe（115）By root connection, at second set
Pipe（4）An entity pipe in pipe（115）On bind polyurethane（18）, in two grades of sleeve pipes（4）A piece entity pipe of the mouth of pipe（115）
On bind polyurethane（18）, in two grades of sleeve pipes（4）The mouth of pipe disposes Grouting Pipe（14）And return pipe（15）, Grouting Pipe（14）Through pipe
The polyurethane of mouth（18）, return pipe（15）Through the polyurethane of the mouth of pipe（18）And extend the polyurethane in pipe（18）Place, in the mouth of pipe
The polyurethane at place（18）Fill in yellow mud（16）, and use timber wedge（17）Stopper yellow mud（16）；
Step 5：Treat yellow mud（16）After consolidation, by Grouting Pipe（14）To two polyurethane（18）Between carry out slip casting, return pipe
（15）After backflow, slip casting terminates；
Step 6：By entity pipe（115）With threeway（13）Connection, by stop valve（11）And pressure gauge（12）Installed in threeway（13）
On, the work of pressure measurement sealing of hole is completed, finally determine gas pressure.
2. easy gushing water coal seam upward hole gas pressure measurement method according to claim 1, it is characterised in that：Described reality
Body pipe（15）Every two meters set one, two adjacent entity pipes（15）Between tightly wrap connection with raw material band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710139862.6A CN106894785A (en) | 2017-03-10 | 2017-03-10 | Easy gushing water coal seam upward hole gas pressure measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710139862.6A CN106894785A (en) | 2017-03-10 | 2017-03-10 | Easy gushing water coal seam upward hole gas pressure measurement method |
Publications (1)
| Publication Number | Publication Date |
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| CN106894785A true CN106894785A (en) | 2017-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710139862.6A Pending CN106894785A (en) | 2017-03-10 | 2017-03-10 | Easy gushing water coal seam upward hole gas pressure measurement method |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162635A (en) * | 2018-09-19 | 2019-01-08 | 淮北矿业股份有限公司 | A kind of new pressure measuring drill hole construction technology |
| CN109488370A (en) * | 2018-11-26 | 2019-03-19 | 淮南矿业(集团)有限责任公司 | A kind of underground limestone leting speeper drilling construction method |
| CN109915070A (en) * | 2019-04-09 | 2019-06-21 | 中国矿业大学(北京) | The down-hole coal bed test gas pressure hole sealing device of one kind and method |
| CN111677513A (en) * | 2020-06-22 | 2020-09-18 | 安徽理工大学 | Water burst sand bursting disturbance deep unconsolidated formation ground grouting pore-forming method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109162635A (en) * | 2018-09-19 | 2019-01-08 | 淮北矿业股份有限公司 | A kind of new pressure measuring drill hole construction technology |
| CN109488370A (en) * | 2018-11-26 | 2019-03-19 | 淮南矿业(集团)有限责任公司 | A kind of underground limestone leting speeper drilling construction method |
| CN109915070A (en) * | 2019-04-09 | 2019-06-21 | 中国矿业大学(北京) | The down-hole coal bed test gas pressure hole sealing device of one kind and method |
| CN111677513A (en) * | 2020-06-22 | 2020-09-18 | 安徽理工大学 | Water burst sand bursting disturbance deep unconsolidated formation ground grouting pore-forming method |
| CN111677513B (en) * | 2020-06-22 | 2021-06-29 | 安徽理工大学 | Water burst sand bursting disturbance deep unconsolidated formation ground grouting pore-forming method |
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| PB01 | Publication | ||
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Application publication date: 20170627 |