CN106401524A - Grouting device and fracturing hole sealing device - Google Patents
Grouting device and fracturing hole sealing device Download PDFInfo
- Publication number
- CN106401524A CN106401524A CN201611117292.2A CN201611117292A CN106401524A CN 106401524 A CN106401524 A CN 106401524A CN 201611117292 A CN201611117292 A CN 201611117292A CN 106401524 A CN106401524 A CN 106401524A
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- pipe
- grout outlet
- grouting
- plugging
- plugging device
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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
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a grouting device and a fracturing hole sealing device. The grouting device comprises a grouting pipe, a first plugging device, a second plugging device and a switching device. A first grout outlet, a second grout outlet and a third grout outlet are formed in the grouting pipe. The first plugging device is arranged on the first grout outlet, the second plugging device is arranged on the second grout outlet, the grouting pipe is in one-way communication with the first plugging device and the second plugging device, and the switching device is arranged on the third grout outlet. The switching device is used for opening the third grout outlet after grouting liquid enters the first plugging device and the second plugging device, a first hole sealing layer is formed on a hole opening of a fracturing drill hole and a second hole sealing layer is formed at the preset position of the fracturing drill hole to enable the grouting liquid to enter the fracturing drill hole. According to the grouting device and the fracturing hole sealing device, the plugging effect on the fracturing drill hole is good, and the problems of hole opening water escape and leakage in the coal bed fracturing process can be avoided.
Description
Technical field
The present invention relates to safety of coal mines technology, more particularly, to a kind of grouting device and pressure break hole sealing device.
Background technology
Coal and gas prominent is to threaten one of major casualty of Safety of Coal Mine Production.At present, mash gas extraction, fall are relied primarily on
The method of low coal seam gas-bearing capacity is preventing and treating coal and gas prominent.For hypotonicity coal seam, the extraction efficiency of gas is low, needs
The gas permeability to increase coal seam for the method in dependence fracturing coal seam, and then improve the extraction efficiency of gas, with effectively preventing
Coal and gas prominent.
When using fracturing coal seam method pressure break coal seam, liquid is injected to coal seam by pressure break pipe, for making liquid inject
To in coal seam, and avoid liquid to flow out from operating side, sealing pores need to be carried out to fracturing borehole using hole sealing device.At present, often
To carry out sealing pores by way of the end in Grouting Pipe carries equipped with the plugging bag of the sealing materials such as polyester ammonia, to logical
The predetermined position crossing the dilatancy of the sealing materials such as polyester ammonia in boring forms sealing of hole layer, so by drilling orifice and
Region between sealing of hole layer is injected the mode of injection slurry to complete sealing pores.
When sealing pores are carried out using said method, because the sealing materials such as polyester ammonia have ageing, generally exist
Rapid dilatancy after 10 minutes.So, during the Grouting Pipe carrying plugging bag is sent into boring, the sealing of hole such as polyester ammonia
Material can be formed sealing of hole layer, boring blocked with regard to dilatancy when Grouting Pipe does not also reach precalculated position.Therefore,
Fracturing borehole is carried out during sealing pores using the method for prior art, it is impossible to ensure that sealing of hole layer is located at precalculated position, leading to seal
Hole depth is shallower, thus when injecting fracturing fluid by pressure break pipe to coal seam, pressure break Guan Huicong sealing of hole layer oozes out, occur metalling run out,
The phenomenon of leak, or even also there is fracturing fluid and break through sealing of hole layer thus going out the situation of fracturing borehole.Therefore, the sealing of hole of prior art
Fracturing effect is bad.
Content of the invention
The present invention provides a kind of grouting device and a kind of pressure break hole sealing device, is being entered with solving existing pressure break hole sealing device
During row sealing pores it is impossible to ensure sealing of hole layer be located at precalculated position, lead to hole sealing depth shallower, thus by pressure break pipe to coal
Layer injection fracturing fluid during, exist metal run out, fracturing borehole is integrally gone out in leak, even pressure break pipe and grouting device
Problem.
First aspect present invention provides a kind of grouting device, including：Grouting Pipe, the first plugging device, the second plugging device
And switching device, described Grouting Pipe is provided with the first grout outlet, the second grout outlet and the 3rd grout outlet, described first grout outlet
At the aperture of fracturing borehole, described second grout outlet is located at the predetermined position of described fracturing borehole, described 3rd pulp
Mouth is located between described first grout outlet and described second grout outlet；
Described first plugging device is arranged at described first grout outlet, and described second plugging device is arranged on described second
At grout outlet, described Grouting Pipe respectively with described first plugging device and described second plugging device unilaterally connected, described switch
Device is arranged at described 3rd grout outlet；
Described switching device, for entering described first plugging device and described second plugging device in injection slurry, in institute
State and at the aperture of fracturing borehole, form the first sealing of hole layer and predetermined position formation the second sealing of hole layer in described fracturing borehole
Afterwards, open described 3rd grout outlet, so that injection slurry enters described fracturing borehole.
Further, described first grout outlet passes through the first check valve described first plugging device of connection, so that described note
Slurries are unidirectional to be flow in described first plugging device.
Further, described second grout outlet passes through the second check valve described second plugging device of connection, so that described note
Slurries are unidirectional to be flow in described second plugging device.
Further, described switching device is pressure explosive valve.
Further, described first plugging device and described second plugging device are plugging bag.
The grouting device that the present invention provides, by arranging Grouting Pipe, the first plugging device, the second plugging device and switch dress
Put, and the first grout outlet, the second grout outlet and the 3rd grout outlet are provided with Grouting Pipe, the first grout outlet is located at fracturing borehole
At aperture, the second grout outlet is located at the predetermined position of fracturing borehole, and the 3rd grout outlet is located at the first grout outlet and the second pulp
Between mouthful, the first plugging device is arranged at the first grout outlet, and the second plugging device is arranged at the second grout outlet, and Grouting Pipe is divided
Not with the first plugging device and the second plugging device unilaterally connected, switching device is arranged at the 3rd grout outlet, and switching device,
For entering the first plugging device and the second plugging device in injection slurry, formed at the aperture of fracturing borehole the first sealing of hole layer,
And after the predetermined position of fracturing borehole forms the second sealing of hole layer, open the 3rd grout outlet, so that injection slurry enters pressure break
Boring.So, the plugging effect of sealing of hole can be improved, improve the hole sealing depth of sealing of hole, and then during coal bed fracturing, can prevent
Only aperture metal run out, the phenomenon of leak, to improve fracturing effect.
Second aspect present invention provides a kind of pressure break hole sealing device, including：Pressure break pipe, slurry recovering tube and first aspect present invention
The arbitrary grouting device providing；Wherein,
The switching device of described grouting device, for entering described first plugging device and described second closure in injection slurry
Device, forms the first sealing of hole layer and the predetermined position formation second in fracturing borehole at the aperture of described fracturing borehole
After sealing of hole layer, open the grout outlet that described switching device controls, so that injection slurry enters described fracturing borehole, block described pressure break
Space between space between pipe and described fracturing borehole and described slurry recovering tube and described fracturing borehole.
The present invention provide pressure break hole sealing device, by by grouting device be set to including Grouting Pipe, the first plugging device,
First grout outlet, the second grout outlet and the 3rd grout outlet be provided with the second plugging device and switching device, and Grouting Pipe, first
Grout outlet is located at the aperture of fracturing borehole, and the second grout outlet is located at the predetermined position of fracturing borehole, and the 3rd grout outlet is located at
Between first grout outlet and the second grout outlet, the first plugging device is arranged at the first grout outlet, and the second plugging device is arranged on
At second grout outlet, Grouting Pipe respectively with the first plugging device and the second plugging device unilaterally connected, switching device is arranged on
At three grout outlets, and switching device, for entering the first plugging device and the second plugging device in injection slurry, in fracturing borehole
Form the first sealing of hole layer at aperture and after the predetermined position of fracturing borehole forms the second sealing of hole layer, open switching device
The grout outlet controlling so that injection slurry enters fracturing borehole, block space between described pressure break pipe and described fracturing borehole with
And the space between described slurry recovering tube and described fracturing borehole.So, the plugging effect of sealing of hole can be improved, improve the sealing of hole of sealing of hole
Depth, so during coal bed fracturing, can prevent aperture from metalling run out, the phenomenon of leak, to improve fracturing effect.
Further, described pressure break pipe includes：Flexible pipe, rigid pipe, screen casing and conveying device, one end of described rigid pipe with
Described flexible pipe connects, and the other end of described rigid pipe is connected with described screen casing；Second plugging device of described grouting device and institute
State rigid pipe to connect；
Described conveying device is fixedly connected with described rigid pipe, when described conveying device is promoted in fracturing borehole,
Described conveying device drives described pressure break pipe and described grouting device to move to the end of described fracturing borehole, so that described screen casing
The mobile end to described fracturing borehole, and, make described Grouting Pipe mobile to described predetermined position.
Further, described first plugging device is also connected with described conveying device.
Further, the outer wall of described rigid pipe is provided with the female silk cap of tool, described conveying device has outer
Screw thread, described external screw thread and described internal thread coupling, described conveying device is fixedly connected with described rigid pipe by described silk cap；
Pipe clamp, the dead in line of the axis of described pipe clamp and described silk cap, institute are additionally provided with the outer wall of described rigid pipe
State pipe clamp for the outer wall of conveying device described in clamping.
Further, described conveying device is also connected with described flexible pipe.
The pressure break hole sealing device that the present invention provides, by being set to pressure break pipe including flexible pipe, rigid pipe, screen casing and conveying
Device, and one end of rigid pipe is connected with flexible pipe, the other end of rigid pipe is connected with screen casing, the second plugging device of grouting device
It is connected with rigid pipe, conveying device is fixedly connected with rigid pipe.So, because pressure break pipe includes flexible pipe, and the length of a flexible pipe
Degree is longer, so, can reduce the joint quantity of whole pressure break pipe, to avoid leading to during water delivery because of pressure break pipe joint more
There is drainage.Additionally, the pressure break hole sealing device that the present invention provides, when conveying device is promoted in fracturing borehole, defeated
Send device that pressure break pipe and grouting device can be driven to move to the end of fracturing borehole, so that screen casing movement is to the end of fracturing borehole
End, and, make Grouting Pipe movement to predetermined position, this way it is not necessary to increase extra auxiliary equipment, just can be by pressure break pipe
It is delivered in fracturing borehole with grouting device, it is possible to decrease the cost of whole pressure break hole sealing device.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description are these
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
The structural representation of the grouting device that Fig. 1 provides for the embodiment of the present invention one；
The structural representation of the grouting device that Fig. 2 provides for the embodiment of the present invention two；
The structural representation of the pressure break hole sealing device that Fig. 3 provides for the embodiment of the present invention three；
The structural representation of the pressure break hole sealing device that Fig. 4 provides for the embodiment of the present invention four；
Fig. 5 provides the structural representation of the pressure break pipe in pressure break hole sealing device for the embodiment of the present invention four；
Fig. 6 provides the structure of the second plugging device in pressure break hole sealing device and rigid pipe cooperation for the embodiment of the present invention four
Schematic diagram；
Fig. 7 provides the knot of the first plugging device in pressure break hole sealing device and conveying device cooperation for the embodiment of the present invention four
Structure schematic diagram；
The structural representation of the pressure break pipe in the pressure break hole sealing device that Fig. 8 provides for the embodiment of the present invention five；
The structural representation of the silk cap in the pressure break hole sealing device that Fig. 9 provides for the embodiment of the present invention five；
The structural representation of the conveying device in the pressure break hole sealing device that Figure 10 provides for the embodiment of the present invention five；
The structural representation that pipe clamp in the pressure break hole sealing device that Figure 11 provides for the embodiment of the present invention five is coordinated with rigid pipe
Figure；
The structural representation of the pressure break pipe in the pressure break hole sealing device that Figure 12 provides for the embodiment of the present invention six.
Description of reference numerals：
100：First plugged zone；
200：Second plugged zone；
1：Grouting Pipe；
11：First grout outlet；
12：Second grout outlet；
13：3rd grout outlet；
2：First plugging device；
21：Second cylindrical hole；
22：Second connecting rope；
3：Second plugging device；
31：First cylindrical hole；
32：First connecting rope；
4：Switching device；
51：First check valve；
52：Second check valve；
500：Grouting device；
6：Pressure break pipe；
61：Screen casing；
62：Flexible pipe；
63：Rigid pipe；
631：First connecting portion；
64：Conveying device；
641：Second connecting portion；
642：External screw thread；
65：Silk cap；
651：The axis of silk cap；
66：Pipe clamp；
661：The axis of pipe clamp；
67：Rubber hose coupling；
68：Screw thread；
7：Slurry recovering tube；
9：Fracturing borehole：
91：The aperture of fracturing borehole；
92：The predetermined position of fracturing borehole；
10：Tie string.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
The present invention provides a kind of grouting device and a kind of pressure break hole sealing device, is being entered with solving existing pressure break hole sealing device
During row sealing pores it is impossible to ensure sealing of hole layer be located at precalculated position, lead to hole sealing depth shallower, thus by pressure break pipe to coal
Layer injection fracturing fluid during, exist metal run out, fracturing borehole is integrally gone out in leak, even pressure break pipe and grouting device
Problem.
Grouting device and pressure break hole sealing device that the present invention provides, can be applicable to coal bed fracturing field.For example, can be applied this
The grouting device that invention provides carries out sealing pores to fracturing borehole, and then injects fracturing fluid in coal seam using pressure break pipe, with
By fracturing fluid pressure break coal seam.
The structural representation of the grouting device that Fig. 1 provides for the embodiment of the present invention one.Refer to Fig. 1, the present embodiment provides
Grouting device, including：Grouting Pipe 1, the first plugging device 2, the second plugging device 3 and switching device 4, Grouting Pipe 1 is arranged
There are the first grout outlet 11, the second grout outlet 12 and the 3rd grout outlet 13, the first grout outlet 11 is located at the aperture 91 of fracturing borehole 9
Place, the second grout outlet 12 is located at the predeterminated position 92 of fracturing borehole 9, and the 3rd grout outlet 13 is located at the first grout outlet 11 and second
Between grout outlet 12；
First plugging device 2 is arranged at the first grout outlet 11, and the second plugging device 3 is arranged at the second grout outlet 12,
Grouting Pipe 1 respectively with the first plugging device 2 and the second plugging device 3 unilaterally connected, switching device 4 is arranged on the 3rd grout outlet 13
Place；
Switching device 4, for entering the first plugging device 2 and the second plugging device 3 in injection slurry, in fracturing borehole 9
After forming the first sealing of hole layer 100 at aperture 91 and forming the second sealing of hole layer 200 at the predeterminated position 92 of fracturing borehole 9, beat
Open the 3rd grout outlet 13, so that injection slurry enters fracturing borehole 9.
Specifically, Grouting Pipe 1 can be hard tube or flexible pipe, and for example, Grouting Pipe 1 can be steel pipe, polyvinyl chloride
Pipe, sebific duct etc..Additionally, the first grout outlet 11, the second grout outlet 12 and the 3rd grout outlet 13 are provided with Grouting Pipe 1, specifically,
First grout outlet 1 is arranged on the top of Grouting Pipe 1, and the second grout outlet 12 is arranged on the end of Grouting Pipe 1, and the 3rd grout outlet 13 sets
Put the middle part in Grouting Pipe 1.And, inject injection slurry in the grouting device providing using the present embodiment to fracturing borehole 9
When, Grouting Pipe 1 need to be delivered in fracturing borehole 9, now, need to ensure that the first grout outlet 11 is located at the aperture 91 of fracturing borehole 9
Place, the second grout outlet 12 is located at the predeterminated position 92 of fracturing borehole 9.It should be noted that predeterminated position 92 is according to reality
Produce it needs to be determined that, for example, it may be at seat earth, can also be at roof, can also be at coal seam, in a word,
When sealing pores being carried out to fracturing borehole using grouting device it is ensured that the second grout outlet is located at screen casing near fracturing borehole hole
The end of mouth.
Alternatively, the first plugging device 2 and the second plugging device 3 can be plugging bag, for example, it is possible to be canvas bag etc..
It should be noted that Grouting Pipe 1 passes through the first grout outlet 11 and the first plugging device 2 unilaterally connected.Similarly, Grouting Pipe 1 is led to
Cross the second grout outlet 12 and the second plugging device 3 unilaterally connected.So, when inputting injection slurry to Grouting Pipe 1, injection slurry can pass through
First grout outlet 11 flows into the first plugging device 2, to form the first plugged zone 100 at the aperture 91 of fracturing borehole 9；Equally
Ground, injection slurry also can be flowed into the second plugging device 3, with the predeterminated position 92 of fracturing borehole 9 by the second grout outlet 12
Form the second plugged zone 200.
It should be noted that in the present embodiment, not the concrete fit system to the first plugging device 2 and Grouting Pipe 1 and
The concrete fit system of the second plugging device 3 and Grouting Pipe 1 is defined, as long as being capable of Grouting Pipe 1 to pass through the first pulp
Mouth 11 is unilaterally connected with the second plugging device 3 by the second grout outlet 12 with the first plugging device 2 unilaterally connected, Grouting Pipe 1
Fit system, belongs to the protection domain of the present embodiment.
Specifically, in the present embodiment, switching device 4 can be automatic valve, and the actuation time of this automatic valve is predetermined threshold value,
For example, above-mentioned predetermined threshold value can be 20 minutes.So, after 20 points of Grouting Pipe 1 slip casting, above-mentioned automatic valve is opened.So, exist
During continuing slip casting using Grouting Pipe 1, in first 20 minutes of slip casting, injection slurry enters the first plugging device 2 and second
Plugging device 3, forms the first sealing of hole layer 100 and the predeterminated position 92 in fracturing borehole 9 at the aperture 91 of fracturing borehole 9
Place forms the second sealing of hole layer 200, and when the slip casting time reaching 20 minutes, above-mentioned automatic valve is opened, now, in Grouting Pipe 1
Injection slurry entered in the fracturing borehole 9 between the first plugged zone 100 and the second plugged zone 200 by the 3rd grout outlet 13.
It should be noted that switching device 4 can also have the device of similar functions for other, in the present embodiment, not right
The specific constructive form of switching device 4 is defined.
Following is a brief introduction of the concrete principle that the grouting device that the present embodiment provides can solve the problem that technical problem.Specifically
Grouting device, before the grouting device providing using the present embodiment carries out slip casting, is first delivered to specifying of fracturing borehole 9 by ground
Position, makes the second grout outlet 12 of Grouting Pipe 1 be located at the predeterminated position 92 of fracturing borehole 9, and so that the first grout outlet 11 is located at
At the aperture 91 of fracturing borehole 9, after grouting device is delivered to specified location, inject injection slurry in Grouting Pipe 1, now,
Injection slurry is entered the first plugging device 2, is formed the first sealing of hole layer at the aperture 91 of fracturing borehole 9 by the first grout outlet 11
100, and the second plugging device 3 is entered by the second grout outlet 12, form the second closure at the predeterminated position 92 of fracturing borehole 9
Layer 200, after forming the first plugged zone 100 and the second plugged zone 200, switching device 4 opens the 3rd grout outlet 13, Grouting Pipe 1
Interior injection slurry enters the fracturing borehole 9 between the first plugged zone 100 and the second plugged zone 200.So it is ensured that first blocks
Layer 100 is formed at the aperture 91 of fracturing borehole 9, and the second plugged zone 200 is formed at the predeterminated position 92 of fracturing borehole 9, enters
And making sealing of hole extend to predetermined position from fracturing borehole aperture, hole sealing depth is deeper, so, can improve the closure of sealing of hole
Effect, and then improve fracturing effect.
The grouting device that the present embodiment provides, by arranging Grouting Pipe, the first plugging device, the second plugging device and switch
First grout outlet, the second grout outlet and the 3rd grout outlet are provided with device, and Grouting Pipe, the first grout outlet is located at fracturing borehole
Aperture at, the second grout outlet is located at the predetermined position of fracturing borehole, and the 3rd grout outlet goes out positioned at the first grout outlet and second
Between slurry mouth, the first plugging device is arranged at the first grout outlet, and the second plugging device is arranged at the second grout outlet, Grouting Pipe
Respectively with the first plugging device and the second plugging device unilaterally connected, switching device is arranged at the 3rd grout outlet, and switchs dress
Put, for entering the first plugging device and the second plugging device in injection slurry, form the first sealing of hole at the aperture of fracturing borehole
Layer and fracturing borehole predetermined position formed the second sealing of hole layer after, open the 3rd grout outlet so that injection slurry enter pressure
Split boring.So, the plugging effect of sealing of hole can be improved, improve the hole sealing depth of sealing of hole, and then during coal bed fracturing, can
Prevent aperture from metalling run out, the phenomenon of leak, to improve fracturing effect.
A specific embodiment is given below, for describing the grouting device of present invention offer in detail.
The structural representation of the grouting device that Fig. 2 provides for the embodiment of the present invention two.On the basis of above-described embodiment, such as
Shown in Fig. 2, the grouting device that the present embodiment provides, the first grout outlet 11 connects the first plugging device 2 by the first check valve 51,
So that described injection slurry is unidirectional flowing in the first plugging device 2.
Specifically, refer to Fig. 2, the first check valve 51 is arranged on the first grout outlet, and the first check valve 51 is located at the
In one plugging device 2, Grouting Pipe 1 passes through the first check valve 51 and the first plugging device 2 unilaterally connected.
Further, continue referring to Fig. 2, the grouting device that the present embodiment provides, it is single that the second grout outlet 12 passes through second
Connect the second plugging device 3 to valve 52, so that described injection slurry is unidirectional flowing in the second plugging device 3.
Specifically, refer to Fig. 2, the second check valve 52 is arranged on the second grout outlet 12, and the second check valve 52 is located at
In second plugging device 3, Grouting Pipe 1 passes through the second check valve 52 and the second plugging device 3 unilaterally connected.
Further, in the present embodiment, switching device 4 is pressure explosive valve.
Specifically, the burst pressure of above-mentioned pressure explosive valve is 1.6MPa.So, when to Grouting Pipe 1 injection injection slurry,
Injection slurry first passes through the first grout outlet 11 and the second grout outlet 12 separately flows into the first plugging device 2 and the second plugging device
3, and form the first plugged zone 100 at the aperture 91 of fracturing borehole 9, form second at the predeterminated position 92 of fracturing borehole 9
Plugged zone 200, so, after forming the first plugged zone 100 and the second plugged zone 200, the first plugging device 2 and the second closure fill
Put and in 3, be full of injection slurry, the injection slurry in Grouting Pipe 1 cannot be further continued for being flowed into the first plugging device 2 and the second plugging device 3
Interior, the pressure rise of the liquid in Grouting Pipe 1, when the pressure of liquid reaches the burst pressure of pressure explosive valve, pressure explosion
Valve is opened, and the injection slurry in Grouting Pipe 1 flows into fracturing borehole 9 by the 3rd grout outlet 13.
The grouting device that the present embodiment provides, the first grout outlet passes through the first check valve and connects the first plugging device, so that
Injection slurry is unidirectional to be flow in the first plugging device, and the second grout outlet passes through the second check valve and connects the second plugging device, so that note
Slurries are unidirectional to be flow in the second plugging device, and switching device is pressure explosive valve.So it is ensured that forming the first plugged zone
After the second plugged zone, the 3rd grout outlet opened by switching device, can improve the plugging effect of sealing of hole, and the sealing of hole improving sealing of hole is deep
Degree, so during coal bed fracturing, can prevent aperture from metalling run out, the phenomenon of leak, to improve fracturing effect.
Second aspect present invention provides a kind of pressure break hole sealing device.The pressure break sealing of hole that Fig. 3 provides for the embodiment of the present invention three
The structural representation of device.Refer to Fig. 3, the pressure break hole sealing device that the present invention provides, including：Pressure break pipe 6, slurry recovering tube 7 and such as
Grouting device 500 described in embodiment one or embodiment two；
The switching device 4 of grouting device 500, for entering the first plugging device 2 and the second plugging device 3 in injection slurry,
Form the first sealing of hole layer 100 and form second at the predeterminated position 92 of fracturing borehole 9 at the aperture 91 of fracturing borehole 9
After sealing of hole layer 200, open the grout outlet of switching device 4 control, so that injection slurry enters fracturing borehole 9, closure pressure break pipe 6 and pressure
Split the space between space and slurry recovering tube 7 and the fracturing borehole 9 between boring 9.
Specifically, pressure break pipe 6 can adopt pressure break pipe of the prior art, for example, it may be being made up of steel pipe and screen casing
Pressure break pipe, can also be the pressure break pipe being made up of polyvinyl chloride pipe and screen casing.In addition, slurry recovering tube 7 can for steel pipe, iron pipe,
Sebific duct etc..Additionally, refer to Fig. 3, when the hole sealing device being provided using the present embodiment carries out sealing pores to fracturing borehole, pressure
The screen casing 61 splitting pipe 6 is located at the end of fracturing borehole 9.It should be noted that the pressure break hole sealing device that the present embodiment provides, slip casting
The concrete structure of device 500 and operation principle may refer to embodiment one or the description of embodiment two, and here is omitted.
Following is a brief introduction of and sealing pores are carried out to fracturing borehole using the pressure break hole sealing device that the present embodiment provides
When concrete grammar.Specifically, when the pressure break hole sealing device being provided using the present embodiment carries out sealing pores to fracturing borehole,
Specific method for sealing may comprise steps of：
Step one, pressure break pipe 6, grouting device 500 and slurry recovering tube 7 are placed the precalculated position to fracturing borehole 9 respectively,
Wherein, after placement terminates, the screen casing 61 of pressure break pipe 6 is located at the end of fracturing borehole 9, the second grout outlet 12 of grouting device 500
(it is particularly located at the end near aperture 91 for the screen casing 61 at the predeterminated position 92 of fracturing borehole 9)；
Step 2, continue to Grouting Pipe 1 inject injection slurry so that injection slurry is flowed into the first plugging device 2 from Grouting Pipe 1
With the second plugging device 3, form the first sealing of hole layer 100 and presetting in fracturing borehole 9 at the aperture 91 of fracturing borehole 9
Form the second sealing of hole layer 200 at position 92；
Step 3, continue to Grouting Pipe 1 inject injection slurry so that the switching device 4 of grouting device 500, enter in injection slurry
Enter the first plugging device 2 and the second plugging device 3, form the first sealing of hole layer 100, Yi Ji at the aperture 91 of fracturing borehole 9
After forming the second sealing of hole layer 200 at the predeterminated position 92 of fracturing borehole 9, open the grout outlet of switching device 4 control, and then make note
Slurries enter fracturing borehole 9；
Step 4, when slurry recovering tube 7 returns slurry, block slurry recovering tube 7, and continue to Grouting Pipe 1 inject injection slurry；
Step 5, when the pressure of Grouting Pipe 1 reaches predetermined threshold value, stop slip casting, sealing of hole and terminate.
One description in conjunction with the embodiments, the pressure break hole sealing device that the present embodiment provides, by being set to wrap grouting device
Include be provided with Grouting Pipe, the first plugging device, the second plugging device and switching device, and Grouting Pipe the first grout outlet, second
Grout outlet and the 3rd grout outlet, the first grout outlet is located at the aperture of fracturing borehole, and the second grout outlet is located at the pre- of fracturing borehole
If at position, the 3rd grout outlet is located between the first grout outlet and the second grout outlet, and the first plugging device is arranged on the first pulp
Mouthful at, the second plugging device is arranged at the second grout outlet, Grouting Pipe respectively with the first plugging device and the second plugging device list
To connection, switching device is arranged at the 3rd grout outlet, and switching device, for entering the first plugging device and the in injection slurry
Two plugging devices, form the first sealing of hole layer at the aperture of fracturing borehole and form the in the predetermined position of fracturing borehole
After two sealing of hole layers, open the grout outlet of switching device control, so that injection slurry enters fracturing borehole, block described pressure break pipe and institute
State the space between space and described slurry recovering tube and the described fracturing borehole between fracturing borehole.So, sealing of hole can be improved
Plugging effect, improves the hole sealing depth of sealing of hole, so during coal bed fracturing, can prevent aperture from metalling run out, leak
Phenomenon, to improve fracturing effect.
The structural representation of the pressure break hole sealing device that Fig. 4 provides for the embodiment of the present invention four；Fig. 5 is the embodiment of the present invention four
The structural representation of the pressure break pipe in pressure break hole sealing device is provided.Refer to Fig. 4 and Fig. 5, the fracturing borehole that the present embodiment provides
Device, pressure break pipe 6 includes：Flexible pipe 62, rigid pipe 63, screen casing 61 and conveying device 64, one end of rigid pipe 63 is with flexible pipe 62 even
Connect, the other end of rigid pipe 63 is connected with screen casing 61；Second plugging device 3 of grouting device 500 is connected with rigid pipe 63；
Conveying device 64 is fixedly connected with rigid pipe 63, when conveying device 63 is promoted in fracturing borehole 9, conveying dress
Put 64 drive pressure break pipes 6 and grouting device 500 to move to the end of fracturing borehole 9, so that screen casing 61 moves to fracturing borehole 9
End, and, make Grouting Pipe 1 mobile to predeterminated position 92.
It should be noted that in the present embodiment, flexible pipe 62, rigid pipe 63 and screen casing 61 form the water-supply-pipe of pressure break pipe 6, its
In, the length of a flexible pipe 62 is longer, usually 30 meters, so so that the joint negligible amounts of whole pressure break pipe 6.
Additionally, rigid pipe 63 can be metal tube or non-metallic pipe, as long as it is enough to ensure that rigid pipe 63 has
Intensity and resistance to pressure.It should be noted that conveying device 64 is rod-like structure, and this conveying device 64 is being made by power
Used time does not deform, and for example, conveying device 64 can be iron, metal tube, non-metallic pipe etc..
It should be noted that the mode that rigid pipe 63 and flexible pipe 62 can be threaded connection connects, can also be by connecing
Head or screwed connection.Similarly, the mode that rigid pipe 63 and screen casing 61 can be threaded connection connects, can also be by connecing
Head or screwed connection.Additionally, rigid pipe 63 can also be connected with flexible pipe 62, screen casing 61 by other means, specific connection
Mode here does not repeat one by one.
Further, refer to Fig. 5, conveying device 64 is fixedly connected with rigid pipe 63.Specifically, when rigid pipe 63 is gold
Belong to pipe, and when conveying device 64 is the conveying device made using metal material, the mode not only by welding will convey dress
Put 64 to be fixedly connected with rigid pipe 63, can also be by sheathed one annular buckle (this annular on the outer wall of conveying device 64
Buckle is fixed on the outer wall of conveying device 64), on the outer wall of rigid pipe 63, (this annular buckle is solid for sheathed one annular buckle
It is scheduled on the outer wall of rigid pipe 63), and then this two annular buckles are fixedly connected, will be conveyed by this two annular buckles
Device 64 is fixedly connected with rigid pipe 63.Similarly, when conveying device 64 and rigid pipe 63 are non-metallic pipe, can pass through
Sheathed one annular buckle (this annular buckle is fixed on the outer wall of conveying device 64) on the outer wall of conveying device 64, in rigidity
A sheathed annular buckle (this annular buckle is fixed on the outer wall of rigid pipe 63) on the outer wall of pipe 63, and then by this two rings
Shape buckle is fixedly connected, to be fixedly connected conveying device 64 with rigid pipe 63 by this two annular buckles.Need explanation
It is that, when conveying device 64 is metal tube, rigid pipe 63 is it is also possible to by said method by conveying device 64 He during non-metallic pipe
Rigid pipe 63 is fixedly connected.It should be noted that in the present embodiment, not entering to the connected mode of conveying device 64 and rigid pipe 63
Row limits.
Further, in the present embodiment, the second plugging device 3 of grouting device 500 is fixedly connected with rigid pipe 63.Example
As the second plugging device 3 being banded on the outer wall of rigid pipe 63, to realize the second envelope by connecting rope (can be iron wire)
Block apparatus 3 are fixedly connected with rigid pipe 63.Fig. 6 shows that the structure that a kind of second plugging device 3 is coordinated with rigid pipe 63 is shown
It is intended to, as shown in fig. 6, in this kind of implementation, the second plugging device 3 can be the plugging bag with the first cylindrical hole 31
(for example, it is possible to the structure for similar water wing), and the first connecting rope 32, rigid pipe are provided with the side of the first cylindrical hole 31
First connecting portion 631 is provided with 63 outer wall, so, rigid pipe 63 can be located in the first cylindrical hole 31, and by first
Connecting rope 32 is bundled in first connecting portion 631, to realize being fixedly connected of the second plugging device 3 and rigid pipe 63.Need
Bright, when second plugging device 3 being fixed on rigid pipe 63 by the first connecting rope 32, the side of the first cylindrical hole 31
Outer wall with rigid pipe 63 is fitted tightly.
Furthermore, it is necessary to illustrate, Fig. 6 illustrate only the connected mode of a kind of second plugging device 3 and rigid pipe 63, also
By other means the second plugging device 3 can be fixedly connected on rigid pipe 63, with regard to specific method herein not one by one
Repeat.
It should be noted that sealing pores are carried out to fracturing borehole in the pressure break hole sealing device providing using the present embodiment
When, conveying device 64 can be made to move to the end of fracturing borehole in fracturing borehole 9 by way of promoting conveying device 64,
Because conveying device 64 is fixedly connected with rigid pipe 63, and rigid pipe 63 is connected with the second plugging device 3 of grouting device 500,
Therefore, when conveying device 64 moves in fracturing borehole 9, pressure break pipe 6 and grouting device 500 can be driven mobile, by screen casing
61 ends being delivered to boring 9, and Grouting Pipe 1 is delivered at predeterminated position 92.So, conveying device 64 can be passed through, convenient,
Reliably pressure break pipe 6 and grouting device 500 are delivered to specified location in fracturing borehole 9 it is not necessary to increase extra auxiliary
Equipment, it is possible to decrease the cost of whole pressure break hole sealing device.Further, the pressure break hole sealing device that the present embodiment provides, due to pressure
Split pipe 6 and include flexible pipe 62, and the length of a flexible pipe 62 is longer, so so that the joint negligible amounts of pressure break pipe 6, so,
During using pressure break pipe 6 water delivery pressure break coal seam, can avoid further drainage.
The pressure break hole sealing device that the present embodiment provides, by being set to pressure break pipe including flexible pipe, rigid pipe, screen casing and defeated
Send device, and one end of rigid pipe is connected with flexible pipe, the other end of rigid pipe is connected with screen casing, the second closure dress of grouting device
Put and be connected with rigid pipe, conveying device is fixedly connected with rigid pipe.So, because pressure break pipe includes flexible pipe, and a flexible pipe
Length is longer, so, can reduce the joint quantity of whole pressure break pipe, to avoid leading in water delivery pressure break coal because of pressure break pipe joint more
There is drainage during layer.Additionally, the pressure break hole sealing device that the present embodiment provides, when conveying device is in fracturing borehole
When being promoted, conveying device can drive pressure break pipe and grouting device to move to the end of fracturing borehole, so that screen casing is mobile extremely pressing
Split the end of boring, and, make Grouting Pipe movement to predetermined position, this way it is not necessary to increase extra auxiliary equipment, just may be used
So that pressure break pipe and grouting device to be delivered to specified location, it is possible to decrease the cost of whole pressure break hole sealing device.
Further, the first plugging device 2 is also connected with conveying device 64.
Specifically, the first plugging device 2 can be connected with conveying device 64 by connecting rope.For example, can (can by connecting rope
Think iron wire) the first plugging device 2 is banded on the outer wall of conveying device 64, to realize the first plugging device 2 and conveying dress
The connection put.Fig. 7 shows the structural representation of a kind of first plugging device 2 and conveying device 64 cooperation, this kind of realization side
In formula, the first plugging device 2 can be the plugging bag with the second cylindrical hole 21 (for example, it is possible to be the knot of similar water wing
Structure), and the second connecting rope 22 is provided with the side of the second cylindrical hole 21, the outer wall of conveying device 64 is provided with the second connection
Portion 641, so, conveying device 64 can be located in the second cylindrical hole 21, and the second connecting rope 22 is bundled in the second connection
In portion 641, to realize the connection of the first plugging device 3 and conveying device 63.It should be noted that refer to Fig. 6, when the first envelope
When block apparatus 2 are the plugging bag with the second cylinder 21, flexible pipe 62 and slurry recovering tube 7 also can also be located in the second cylindrical hole 21
Interior.Additionally, work as first plugging device 2 is fixed in conveying device 64 by the second connecting rope 22, and by flexible pipe 62 and return slurry
When pipe 7 is located in the second cylinder in the hole, the side of the second cylindrical hole 21 will respectively with flexible pipe 62, slurry recovering tube 7 and conveying device 64
Fit tightly.
It should be noted that Fig. 7 illustrate only a kind of second plugging device 2 and the connected mode of conveying device 64, also may be used
By other means the first plugging device 2 to be connected in conveying device 64, do not repeat one by one with regard to specific method herein.
The pressure break hole sealing device that the present embodiment provides, by being connected the first plugging device with conveying device, so, can prevent
Only Grouting Pipe bends, stacks phenomenon, to reduce the frictional resistance in course of conveying, successfully conveys pressure break hole sealing device
To precalculated position.
A specific embodiment is given below, to describe the concrete connected mode of conveying device and rigid pipe in detail.
The structural representation of the pressure break pipe in the pressure break hole sealing device that Fig. 8 provides for the embodiment of the present invention five；Fig. 9 is this
The structural representation of the silk cap in the pressure break hole sealing device that bright embodiment five provides；The pressure that Figure 10 provides for the embodiment of the present invention five
Split the structural representation of the conveying device in hole sealing device；In the pressure break hole sealing device that Figure 11 provides for the embodiment of the present invention five
The structural representation that pipe clamp is coordinated with rigid pipe.Refer to Fig. 8 to Figure 11, the pressure break hole sealing device that the present embodiment provides, rigidity
The female silk cap 66 of tool is provided with the outer wall of pipe 63, conveying device 64 has an external screw thread 642, external screw thread 642 and above-mentioned
Internal thread mates, and conveying device 64 is fixedly connected with rigid pipe 63 by silk cap 66；
Pipe clamp 65 is additionally provided with the outer wall of rigid pipe 63, the axis 651 of pipe clamp 65 and the axis 661 of silk cap 66 overlap,
Pipe clamp 65 is used for the outer wall of clamping conveying device 64.
Specifically, the coal bed fracturing pipe that the present embodiment provides, flexible pipe 62 is sebific duct, and rigid pipe 63 is metal tube, conveying dress
Putting 64 is metal tube.Alternatively, rigid pipe 63 is steel pipe, and conveying device 64 is many iron pipes, and iron pipe adopts tube coupling to connect.And
One end of rigid pipe 63 is connected with flexible pipe 62 by rubber hose coupling 67, and the other end of rigid pipe 63 passes through screw thread 68 with screen casing 61 even
Connect.It should be noted that the concrete structure of rubber hose coupling 67 and screw thread 68 may refer to description of the prior art, herein no longer
Repeat.
Specifically, refer to Fig. 8 and Fig. 9, silk cap 66 is arranged on rigid pipe 63 one end near screen casing 61, and silk cap 66 is
The cylindrical shape structure of hollow, cylindrical inwall has internal thread (not shown).It should be noted that silk cap 66 is adopted
Made with metal material, and silk cap 66 by welding by way of be fixed on rigid pipe 63 outer wall on (specifically, silk cap 66 passes through
Side is welded on rigid pipe 63).
Refer to Figure 10, in the present embodiment, the outer wall of conveying device 64 has external screw thread 642, and external screw thread 642 and silk
Internal thread coupling on cap 66.Further, referring to Fig. 8 to Figure 10, in the present embodiment, conveying device 64 passes through silk cap
66 are fixedly connected with rigid pipe 63.
Further, refer to Fig. 8 and Figure 11, pipe clamp 65 is welded on that on the outer wall of rigid pipe 63, (specifically, pipe clamp 65 welds
It is connected on rigid pipe 63 one end near flexible pipe 62), and after pipe clamp 65 is welded on the outer wall of rigid pipe 63, the axle of pipe clamp 65
Line 651 is overlapped with the axis 661 of silk cap 66, so, conveying device 64 can also cross silk cap 66 and pipe clamp 65, and and silk cap
66 are threadably secured, and pipe clamp 65 is then fastened on the outer wall of conveying device 64.
It should be noted that in the present embodiment, the concrete structure of pipe clamp 65 may refer to description of the prior art, herein
Repeat no more.
The structural representation of the pressure break pipe in the pressure break hole sealing device that Figure 12 provides for the embodiment of the present invention six.In above-mentioned reality
On the basis of applying example, the pressure break hole sealing device that the present embodiment provides, conveying device 64 is also connected with flexible pipe 62.
Specifically, refer to Figure 12, conveying device 64 can be connected with flexible pipe 62 by tie string 10.
In the present embodiment, conveying device 64 is connected with flexible pipe 62, so, is promoting conveying device 64, whole coal seam is pressed
Split during pipe is delivered in fracturing borehole 9, can prevent flexible pipe 62 from bending, stacking, and then reduce the friction in course of conveying
Pressure break hole sealing device smoothly can be transported to precalculated position by resistance.
The pressure break hole sealing device that the present embodiment provides, by connecting conveying device and flexible pipe, so, will be defeated for pressure break pipe
When delivering in fracturing borehole, the phenomenon that flexible pipe bends, stacks can be avoided, and then reduce the frictional resistance in course of conveying,
Smoothly pressure break hole sealing device can be transported to precalculated position.
Finally it should be noted that：Various embodiments above only in order to technical scheme to be described, is not intended to limit；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or wherein some or all of technical characteristic is entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of grouting device is it is characterised in that include：Grouting Pipe, the first plugging device, the second plugging device and switch dress
Put, described Grouting Pipe is provided with the first grout outlet, the second grout outlet and the 3rd grout outlet, described first grout outlet is located at pressure break
At the aperture of boring, described second grout outlet is located at the predetermined position of described fracturing borehole, and described 3rd grout outlet is located at institute
State between the first grout outlet and described second grout outlet；
Described first plugging device is arranged at described first grout outlet, and described second plugging device is arranged on described second pulp
Mouthful at, described Grouting Pipe respectively with described first plugging device and described second plugging device unilaterally connected, described switching device
It is arranged at described 3rd grout outlet；
Described switching device, for entering described first plugging device and described second plugging device in injection slurry, in described pressure
Split and form the first sealing of hole layer at the aperture of boring and after the predetermined position of described fracturing borehole forms the second sealing of hole layer,
Open described 3rd grout outlet, so that injection slurry enters described fracturing borehole.
2. device according to claim 1 is it is characterised in that described first grout outlet passes through described in the first check valve connection
First plugging device, so that described injection slurry is unidirectional flow in described first plugging device.
3. device according to claim 2 is it is characterised in that described second grout outlet passes through described in the second check valve connection
Second plugging device, so that described injection slurry is unidirectional flow in described second plugging device.
4. the device according to any one of claim 1-3 is it is characterised in that described switching device is pressure explosive valve.
5. device according to claim 4 is it is characterised in that described first plugging device and described second plugging device are equal
For plugging bag.
6. a kind of pressure break hole sealing device is it is characterised in that include：Pressure break pipe, slurry recovering tube and as described in any one of claim 1-5
Grouting device；Wherein,
The switching device of described grouting device, for entering described first plugging device and described second closure dress in injection slurry
Put, form the first sealing of hole layer and predetermined position formation the second envelope in fracturing borehole at the aperture of described fracturing borehole
After aperture layer, open the grout outlet that described switching device controls, so that injection slurry enters described fracturing borehole, block described pressure break pipe
Space between space and described fracturing borehole between and described slurry recovering tube and described fracturing borehole.
7. device according to claim 6 is it is characterised in that described pressure break pipe includes：Flexible pipe, rigid pipe, screen casing and defeated
Send device, one end of described rigid pipe is connected with described flexible pipe, and the other end of described rigid pipe is connected with described screen casing；Described note
Second plugging device of sizing device is fixedly connected with described rigid pipe；
Described conveying device is fixedly connected with described rigid pipe, when described conveying device is promoted in fracturing borehole, described
Conveying device drives described pressure break pipe and described grouting device to move to the end of described fracturing borehole, so that described screen casing moves
To the end of described fracturing borehole, and, make described Grouting Pipe mobile to described predetermined position.
8. device according to claim 7 is it is characterised in that described first plugging device is also connected with described conveying device
Connect.
9. device according to claim 8 it is characterised in that be provided with the outer wall of described rigid pipe tool female
Silk cap, described conveying device has external screw thread, and described external screw thread and described internal thread mate, and described conveying device passes through described silk
Cap is fixedly connected with described rigid pipe；
Pipe clamp, the dead in line of the axis of described pipe clamp and described silk cap, described pipe are additionally provided with the outer wall of described rigid pipe
Block the outer wall for conveying device described in clamping.
10. device according to claim 9 is it is characterised in that described conveying device is also connected with described flexible pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611117292.2A CN106401524A (en) | 2016-12-07 | 2016-12-07 | Grouting device and fracturing hole sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611117292.2A CN106401524A (en) | 2016-12-07 | 2016-12-07 | Grouting device and fracturing hole sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106401524A true CN106401524A (en) | 2017-02-15 |
Family
ID=58083728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611117292.2A Pending CN106401524A (en) | 2016-12-07 | 2016-12-07 | Grouting device and fracturing hole sealing device |
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| Country | Link |
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| CN (1) | CN106401524A (en) |
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