CN209556980U - Coal measure gas prospect pit naked eye device for plugging - Google Patents
Coal measure gas prospect pit naked eye device for plugging Download PDFInfo
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- CN209556980U CN209556980U CN201920270052.9U CN201920270052U CN209556980U CN 209556980 U CN209556980 U CN 209556980U CN 201920270052 U CN201920270052 U CN 201920270052U CN 209556980 U CN209556980 U CN 209556980U
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- measure gas
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- gas prospect
- hollow drill
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Abstract
Coal measure gas prospect pit naked eye device for plugging, including grouting pump, water injecting pump, hollow drill and packer, the well head of coal measure gas prospect pit is provided with surface pipe, several section hollow drills are extend into inside coal measure gas prospect pit by the well head of coal measure gas prospect pit, packer is disposed therein outside the lower end of a section hollow drill, grouting pump is connect by Grouting Pipe with most upper section hollow drill upper end, water injecting pump is connect by water injection pipe with the air inlet of packer inner wall, water injection pipe is arranged along hollow drill inner wall, water injection pipe is pierced by Grouting Pipe at the well head of coal measure gas prospect pit and is tightly connected with Grouting Pipe.The utility model efficiently solves the limitation using blocking methods such as inert material, conventional waterflooding mud, casing offs, a kind of new device for plugging and method are provided for coal measure gas prospect pit, the method of optimization pump note program, achieve the purpose that leak stopping, has important practical significance to coal measure gas resource exploration and exploitation.
Description
Technical field
The utility model belongs to coal measure gas exploration engineering field, and in particular to a kind of coal measure gas prospect pit naked eye device for plugging.
Background technique
How to handle bore leaking in complex stratigraphic drilling well is a most common problem.Due to bore leaking, cause
The difficulty of drilling construction, the serious leakage of drilling, water burst cause drilling to be collapsed in turn, card burying has, and are forced to stop brill processing etc..Drilling leakage
Mistake, which is dealt with improperly, can cause other drilling accidents, influence drilling quality and construction efficiency, or even scrap drilling.Traditional treatment method
It mainly include inert material leak stopping, gel-filled or cement leak stopping, casing off leak stopping etc..Inert material in specific implementation process
Plugging effect is limited；It is limited that the plugging materials such as cementing and gel enter crack, is easy to appear repeated leakage, while returning high-leveled and difficult
With control, increases to bore and sweep the plug time；Casing off is costly, and reality is difficult to when casing programme has determined that or well depth is larger
Existing
Coal measure gas refers to the Unconventional gas using coal seam as hydrocarbon source rock, and main component is methane, mainly includes coal seam
Gas, coal measures sandstone gas and shale gas.The more general coal of coal measure gas prospect pit and coal bed gas prospect pit are deep, for detection gas bearing interval and guidance
Sampling work, wellbore construction can all carry out gas detection logging in the process, it is desirable that wellhead drilling fluid returns output and reaches 70% or more, therefore
Coal measure gas prospect pit plugging operation is particularly important.
Coal measure gas prospect pit mostly uses core plugging notifying mechanism of rope core drilling, and drilling rod and borehole wall annular clearance are small, most of interval hole diameter rule,
Enlarging rate is low, and especially complete sandstone interval is more, is suitable for lower packet packing leakage section, makes to solidify material by the method for pressurization
Material enters stratum crack, effectively closure crack, while can control solidification material again and returning height, saves to bore and sweeps the plug time.With tradition
For blocking method compared to the technique by packing leakage section, effectively application grouting pressure, control solidification material enters crack, realizes stifled
Effect is leaked, not only simple process, low in cost, and be advantageously implemented plugging effect, had a extensive future.
Utility model content
The utility model is difficult in order to be easy to appear cement plug length when solving conventional coal measure gas prospect pit leak stopping in the prior art
Control, which increases, sweeps plug time, the leakage of duplicating property and casing off complex procedures, shortcoming at high cost, provides one kind
Coal measure gas prospect pit naked eye device for plugging.
In order to solve the above technical problems, the utility model adopts the following technical solution: coal measure gas prospect pit naked eye device for plugging,
Including grouting pump, water injecting pump, hollow drill and packer, grouting pump and water injecting pump are respectively provided on the ground, hollow drill series connection
Be provided with several sections, the well head of coal measure gas prospect pit is provided with surface pipe, several section hollow drills by coal measure gas prospect pit well head
It extend into inside coal measure gas prospect pit, packer is disposed therein outside the lower end of a section hollow drill, and grouting pump passes through Grouting Pipe
It is connect with most upper section hollow drill upper end, water injecting pump is connect by water injection pipe with the air inlet of packer inner wall, water injection pipe edge
The setting of hollow drill inner wall, water injection pipe are pierced by Grouting Pipe at the well head of coal measure gas prospect pit and are tightly connected with Grouting Pipe.
Valve and pressure gauge are provided in Grouting Pipe, valve closes on grouting pump, and pressure gauge is located at valve and a most upper section is empty
Between heart drilling rod.
Packer includes vertically disposed connecting sleeve, and the upper end inner wall of connecting sleeve is provided with the public affairs with hollow drill
Connector is correspondingly connected in internal screw thread, and the lower end outer wall of connecting sleeve is provided with to be correspondingly connected with outside with the female connector of hollow drill
Screw thread, connecting sleeve excircle are successively fixedly installed solid rubber set, hollow rubber capsule and lower solid rubber from top to bottom
Set, upper solid rubber set, hollow rubber capsule and lower solid rubber set are made into integration, offer in connecting sleeve and hollow rubber capsule
The pipe fitting of inside connection, water injection pipe lower end are connect with pipe fitting, and the outer wall of hollow rubber capsule is provided with several pieces of steel discs.
The upper surface of upper solid rubber set is flushed with connecting sleeve upper end edge, the lower end surface of lower solid rubber set and outer spiral shell
Line upper end flushes, and the inner wall of upper solid rubber set and lower solid rubber set is connect with connecting sleeve outer wall thread.
By adopting the above technical scheme, the blocking method of coal measure gas prospect pit naked eye device for plugging, includes the following steps,
(1) logging operation is carried out to the coal measure gas prospect pit for drilling fluid leakage occur, pit shaft hole diameter parameter is obtained, in conjunction with drilling well
Drilling fluid leakage situation in the process determines the length of main leakage section and the distance apart from well head；
(2) in entrance arrangement grouting pump, water injecting pump, Grouting Pipe and the water injection pipe of coal measure gas prospect pit, according to hole diameter parameter
Select the packer of suitable diameter；
(3) to missing 10 meters of section bottom in coal measure gas prospect pit mainly with retrofilling thickened drilling fluid or back-up sand；
(4) packer is connected on a wherein section hollow drill, by several section hollow drill tripping in coal measure gas prospect pits,
It is located at packer at the siltstone or packsand well section that hole diameter is stable in the leakage above 10-30 meters of range of Duan Ding circle, is insulating
1-2 root hollow drill is also connected with outside connecting sleeve below device；
(5) start water injecting pump, by the intracapsular water filling of the hollow rubber of water injection pipe to packer, expand hollow rubber capsule,
The steel disc being arranged on hollow rubber capsule outer wall is contacted with the press of the borehole wall of coal measure gas prospect pit, thus will leakage section packing；
(6) start grouting pump, cleaning solution is injected into leakage section by Grouting Pipe, core drilling inner hole by grouting pump, is cleaned
Liquid is to the mud materials and sundries for rinsing the leakage borehole wall of section, adhering at crack；
(7) after the completion of cleaning leakage section, start grouting pump, the thin cement slurry for being pumped into industrial soda does prepad fluid, and prepad fluid applies
It overlays on the borehole wall of leakage section；
(8) start grouting pump, be pumped into leakage section mixed with the thick cement slurry for adding accelerator, observe the registration of pressure gauge, to
The pump pressure of grouting pump rises to 8 MPa or more and stops grouting pump；
(9) starting grouting pump is pumped into conventional mud for slurry, by the way of not exclusively replacing slurry, in core drill to leakage section
30-50 meters of cement slurries are stayed in bar, are prevented thick cement slurry for sky；
(10) closing well state is kept, the pressure in leakage section is observed by pressure gauge and waits for normal pressure release, after cement slurry initial set
Start water injecting pump to extract the water in packer out, starts to promote hollow drill recycling packer, Hou Ning；
(11) downward in leakage section formation cement plug, then the cement plug that lower brill solidifies closure leakage section after cement slurry final set
It drills through；
(12) validity check: after boring the boiled water bod, drilling fluid Expenditure Levels is compared, determine plugging effect.
Cleaning solution in step (6) mainly includes clear water, active water or cleaning foam.
Thin cement slurry density in step (7) is 1.24-1.28g/mL.
Step (8) is greater than 1.32g/mL mixed with the density for the thick cement slurry for adding accelerator, and cement grade is not less than
42.5R, presetting period controlled in 2 hours.
Compared with the prior art, the utility model has the following advantages:
The utility model can be used for drilling fluid leakage mainly for the leak stopping for the coal measure gas prospect pit of drilling fluid leakage occur
The leak stopping of the coal bed gas prospect pit of mistake.
Thickened drilling fluid filling is carried out in 10 meters of section bottom of leakage or less and packer is set at 10-30 rice above section missing
It is insulated, it is therefore an objective to make to miss segment limit formation enclosure space, realize high-pressure slip-casting purpose.
First be pumped into cleaning solution, make cleaning solution under pressure, with certain flow rate to leakage the section borehole wall and pit shaft around split
Gap is cleaned, and institute's injection slurry and the borehole wall (crack wall) cementing effect are increased.
It is pumped into thin cement slurry and does prepad fluid, thin cement slurry density is 1.24-1.28g/mL, and low-density slurries, which play, leads slurry
Effect, range of scatter are big.
8 MPa stopping slip casting being risen to wait be pumped, high-pressure slip-casting is realized, more cement slurries is pressed into stratum, realize range
Line blocks, and reaches leak stopping purpose.
The purpose of step (10) is to prevent unexpected pressure release, and institute's injection slurry, which returns, in crack drains into pit shaft.
In conclusion by leakage pars infrasegmentalis infuse thickened drilling fluid, top using packer packing every, formed enclosure space after plus
Pressure grouting is realized and increases injection leakage section pulp quantity, reaches plugging effect.Water in pit shaft can be effectively controlled in Process of Leaking Stoppage simultaneously
Bod height shortens to bore and sweeps the plug time, saves duration, applied widely.The utility model efficiently solve using inert material,
The limitation of the blocking methods such as conventional waterflooding mud, casing off, for coal measure gas prospect pit provide a kind of new device for plugging and
Method, the method for optimization pump note program, achievees the purpose that leak stopping, there is important reality to anticipate coal measure gas resource exploration and exploitation
Justice.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the axial sectional view of packer.
Specific embodiment
As depicted in figs. 1 and 2, the coal measure gas prospect pit naked eye device for plugging of the utility model, including grouting pump 1, water injecting pump
2, hollow drill 3 and packer 4, grouting pump 1 and water injecting pump 2 are respectively provided on the ground, and hollow drill 3 has been arranged in series several
Section, the well head of coal measure gas prospect pit 16 are provided with surface pipe 5, and several section hollow drills 3 are protruded by the well head of coal measure gas prospect pit 16
To inside coal measure gas prospect pit 16, packer 4 is disposed therein outside the lower end of a section hollow drill 3, and grouting pump 1 passes through Grouting Pipe
6 connect with most upper 3 upper end of section hollow drill, and water injecting pump 2 is connect by water injection pipe 7 with the air inlet of 4 inner wall of packer, fill the water
Pipe 7 is arranged along 3 inner wall of hollow drill, and water injection pipe 7 is pierced by Grouting Pipe 6 and close with Grouting Pipe 6 at the well head of coal measure gas prospect pit 16
Envelope connection.
It is provided with valve 8 and pressure gauge 9 in Grouting Pipe 6, valve 8 closes on grouting pump 1, and pressure gauge 9 is located at valve 8 and most upper
Between one section hollow drill 3.
Packer 4 includes vertically disposed connecting sleeve 10, and the upper end inner wall of connecting sleeve 10 is provided with and core drill
The pin end of bar 3 is correspondingly connected in internal screw thread, and the lower end outer wall of connecting sleeve 10 is provided with the female connector pair with hollow drill 3
It should be connected to external screw thread, 10 excircle of connecting sleeve is successively fixedly installed solid rubber from top to bottom and covers 11, hollow rubber
Capsule 12 and lower solid rubber set 13, upper solid rubber set 11, hollow rubber capsule 12 and lower solid rubber set 13 are made into integration, connect
The pipe fitting 14 being connected to inside hollow rubber capsule 12 is offered on casing 10,7 lower end of water injection pipe is connect with pipe fitting 14, hollow
The outer wall of rubber bag tank 12 is provided with several pieces of steel discs 15.Steel disc 15, which plays, avoids hollow rubber capsule 12 from directly contacting with borehole wall press
And wear, extend the service life of hollow rubber capsule 12.
The upper surface of upper solid rubber set 11 is flushed with 10 upper end edge of connecting sleeve, the lower end surface of lower solid rubber set 13
It is flushed with external screw thread upper end, the inner wall and 10 outer wall thread of connecting sleeve of upper solid rubber set 11 and lower solid rubber set 13 connect
It connects.
The blocking method of 16 naked eye device for plugging of coal measure gas prospect pit, includes the following steps,
(1) logging operation is carried out to the coal measure gas prospect pit 16 for drilling fluid leakage occur, pit shaft hole diameter parameter is obtained, in conjunction with brill
Drilling fluid leakage situation during well determines the length of main leakage section 17 and the distance apart from well head；
(2) in entrance arrangement grouting pump 1, water injecting pump 2, Grouting Pipe 6 and the water injection pipe 7 of coal measure gas prospect pit 16, according to well
The packer 4 of diameter parameter selection suitable diameter；
(3) to missing 10 meters of 17 bottom of section in coal measure gas prospect pit 16 mainly with retrofilling thickened drilling fluid or back-up sand 18；
(4) packer 4 is connected on a wherein section hollow drill 3, by several 3 tripping in coal measure gas prospect pits of section hollow drill
In 16, so that packer 4 is located at leakage section 17 and push up the siltstone or packsand well section that hole diameter is stable in the above 10-30 meters of range in boundary
Locate, is also connected with 1-2 root hollow drill 3 outside the connecting sleeve 10 below packer 4；
(5) start water injecting pump 2, filled the water by water injection pipe 7 into the hollow rubber capsule 12 of packer 4, make hollow rubber capsule
12 expand, and the steel disc 15 being arranged on 12 outer wall of hollow rubber capsule is contacted with the press of the borehole wall of coal measure gas prospect pit 16, thus will leakage
Section 17 insulates；
(6) starting grouting pump 1, cleaning solution is injected into leakage section 17 by Grouting Pipe 6, core drilling inner hole by grouting pump 1,
Cleaning solution is to the mud materials and sundries for rinsing the leakage borehole wall of section 17, adhering at crack；
(7) after the completion of cleaning leakage section 17, start grouting pump 1, the thin cement slurry for being pumped into industrial soda does prepad fluid, prepad fluid
On the borehole wall coated in leakage section 17；
(8) start grouting pump 1, be pumped into leakage section 17 mixed with the thick cement slurry for adding accelerator, observe showing for pressure gauge 9
Number, the pump pressure to grouting pump 1 rise to 8 MPa or more and stop grouting pump 1；
(9) starting grouting pump 1 is pumped into conventional mud for slurry, by the way of not exclusively replacing slurry, hollow to leakage section 17
30-50 meters of cement slurries are stayed in drilling rod 3, are prevented thick cement slurry for sky；
(10) closing well state is kept, the pressure in leakage section 17 is observed by pressure gauge 9 and waits for normal pressure release, cement slurry initial set
Starting water injecting pump 2 extracts the water in packer 4 out afterwards, starts to promote the recycling packer 4, Hou Ning of hollow drill 3；
(11) cement plug, then the cement plug that lower brill solidifies closure leakage section 17 are formed in leakage section 17 after cement slurry final set
It drills through downwards；
(12) validity check: after boring the boiled water bod, drilling fluid Expenditure Levels is compared, determine plugging effect.
Cleaning solution in step (6) mainly includes clear water, active water or cleaning foam.
Thin cement slurry density in step (7) is 1.24-1.28g/mL.
Step (8) is greater than 1.32g/mL mixed with the density for the thick cement slurry for adding accelerator, and cement grade is not less than
42.5R, presetting period controlled in 2 hours.
The present embodiment not makes any form of restriction the shape of the utility model, material, structure etc., all foundations
The technical essence of the utility model any simple modification, equivalent change and modification to the above embodiments, belong to this reality
With the protection scope of new technique scheme.
Claims (4)
1. coal measure gas prospect pit naked eye device for plugging, it is characterised in that: including grouting pump, water injecting pump, hollow drill and packer, note
Stock pump and water injecting pump are respectively provided on the ground, and hollow drill has been arranged in series several sections, and the well head of coal measure gas prospect pit is provided with table
Layer casing, several section hollow drills are extend into inside coal measure gas prospect pit by the well head of coal measure gas prospect pit, and packer is disposed therein
Outside the lower end of one section hollow drill, grouting pump is connect by Grouting Pipe with most upper section hollow drill upper end, and water injecting pump passes through
Water injection pipe is connect with the air inlet of packer inner wall, and water injection pipe is arranged along hollow drill inner wall, and water injection pipe is in coal measure gas prospect pit
It is pierced by Grouting Pipe at well head and is tightly connected with Grouting Pipe.
2. coal measure gas prospect pit naked eye device for plugging according to claim 1, it is characterised in that: be provided with valve in Grouting Pipe
And pressure gauge, valve close on grouting pump, pressure gauge is located between valve and most upper section hollow drill.
3. coal measure gas prospect pit naked eye device for plugging according to claim 1, it is characterised in that: packer includes being vertically arranged
Connecting sleeve, the upper end inner wall of connecting sleeve, which is provided with, to be correspondingly connected with the pin end of hollow drill in internal screw thread, connection
The lower end outer wall of casing, which is provided with, to be correspondingly connected with the female connector of hollow drill in external screw thread, connecting sleeve excircle from upper and
Under be successively fixedly installed solid rubber set, hollow rubber capsule and lower solid rubber set, upper solid rubber set, hollow rubber capsule
It is made into integration with lower solid rubber set, offers the pipe fitting being connected to the intracapsular portion of hollow rubber in connecting sleeve, under water injection pipe
End is connect with pipe fitting, and the outer wall of hollow rubber capsule is provided with several pieces of steel discs.
4. coal measure gas prospect pit naked eye device for plugging according to claim 3, it is characterised in that: the upper end of upper solid rubber set
Face is flushed with connecting sleeve upper end edge, and the lower end surface of lower solid rubber set is flushed with external screw thread upper end, upper solid rubber set
It is connect with the inner wall of lower solid rubber set with connecting sleeve outer wall thread.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920270052.9U CN209556980U (en) | 2019-03-04 | 2019-03-04 | Coal measure gas prospect pit naked eye device for plugging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920270052.9U CN209556980U (en) | 2019-03-04 | 2019-03-04 | Coal measure gas prospect pit naked eye device for plugging |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723404A (en) * | 2019-03-04 | 2019-05-07 | 中国煤炭地质总局广东煤炭地质局勘查院 | Coal measure gas prospect pit naked eye device for plugging and method |
| CN111706293A (en) * | 2020-07-10 | 2020-09-25 | 中国煤炭地质总局勘查研究总院 | Drilling hole plugging grouting structure and drilling hole plugging method |
-
2019
- 2019-03-04 CN CN201920270052.9U patent/CN209556980U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109723404A (en) * | 2019-03-04 | 2019-05-07 | 中国煤炭地质总局广东煤炭地质局勘查院 | Coal measure gas prospect pit naked eye device for plugging and method |
| CN109723404B (en) * | 2019-03-04 | 2024-04-16 | 中国煤炭地质总局广东煤炭地质局勘查院 | Naked eye plugging device and method for coal gas exploration well |
| CN111706293A (en) * | 2020-07-10 | 2020-09-25 | 中国煤炭地质总局勘查研究总院 | Drilling hole plugging grouting structure and drilling hole plugging method |
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