CN114517659A - Method for grouting overlying strata abscission layer drill hole - Google Patents
Method for grouting overlying strata abscission layer drill hole Download PDFInfo
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- CN114517659A CN114517659A CN202210161573.7A CN202210161573A CN114517659A CN 114517659 A CN114517659 A CN 114517659A CN 202210161573 A CN202210161573 A CN 202210161573A CN 114517659 A CN114517659 A CN 114517659A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000006578 abscission Effects 0.000 title description 7
- 238000000926 separation method Methods 0.000 claims abstract description 70
- 238000005553 drilling Methods 0.000 claims abstract description 33
- 230000032798 delamination Effects 0.000 claims abstract description 23
- 239000002002 slurry Substances 0.000 claims description 44
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011440 grout Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
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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
- E21B7/00—Special methods or apparatus for drilling
Abstract
The invention provides a method for grouting a overburden bed separation drill hole, which is characterized by comprising the following steps of: drilling a hole at a preset position and cementing the hole, so that the second hole is positioned in the first hole, and the third hole is positioned in the second hole; arranging a first sleeve in the first drill hole, and forming a first well body between the outer wall of the first sleeve and the inner wall of the first drill hole; a second sleeve is arranged in the second drill hole, and a second well body is formed between the outer wall of the second sleeve and the inner wall of the second drill hole; grouting a first delamination area below the first key layer through a second sleeve and a third drill hole; and/or grouting a second delamination area below the second layer of key layer through an annular gap between the inner wall of the first sleeve and the outer wall of the second sleeve. The invention can be used for grouting the separation layers of different layers in the same drilling hole, and further can simultaneously grout the separation layers of different layers.
Description
Technical Field
The application relates to the technical field of overburden bed separation grouting, in particular to a method for overburden bed separation drilling grouting.
Background
After the underground coal is mined out, the overlying strata begin to collapse, when the first layer of key layer collapses, the key layer has high strength, so that the overlying strata can be temporarily supported, at the moment, a certain separation space is formed below the key layer, and the slurry is injected into the space to support the key layer and prevent the key layer from being broken. And if the first key layer is subjected to bending deformation or small-range breakage, secondary reinforcement grouting is needed for the second key layer.
And the drill hole used in the process of overlying strata abscission layer grouting construction is the only channel for injecting grout below the key layer. The method is mainly characterized in that slurry is pumped to an orifice of a grouting drill hole by a grouting pump and then is injected into a target key layer through a sleeve arranged in the grouting drill hole.
In prior art, when drilling needs to satisfy the secondary reinforcement slip casting to the second floor key layer, need carry out directional perforation in the sleeve pipe and just can realize, but because current country is stricter to the explosive management and control, often perforation operation approval procedure is difficult to handle. In addition, if need carry out the slip casting simultaneously to double-deck overburden abscissas, can't realize at all in single drilling, need be in the drilling of the different degree of depth of adjacent site construction, carry out the slip casting to the abscission of different levels respectively, will lead to the fact manpower, material resources and the waste of time certainly.
In summary, because the method for grouting the overburden separation layer in the prior art has the disadvantages as described above, how to provide a better method for grouting the borehole of the overburden separation layer is provided, so that the separation layers of different levels can be grouted in the same borehole, and further, the separation layers of different levels can be simultaneously grouted, which is a problem to be solved in the art urgently.
Disclosure of Invention
In view of the above, the invention provides a method for grouting a overburden separation layer borehole, so that separation layers of different layers can be grouted in the same borehole, and further, separation layers of different layers can be simultaneously grouted.
The technical scheme of the invention is realized in the following way:
a method for grouting a overburden separation layer drill hole comprises the following steps:
step A, drilling a hole at a preset position and cementing the hole, so that the second hole is positioned in the first hole, the third hole is positioned in the second hole, the bottom of the second hole is higher than the bottom of the third hole, and the bottom of the first hole is higher than the bottom of the second hole; arranging a first sleeve in the first drill hole, and forming a first well body between the outer wall of the first sleeve and the inner wall of the first drill hole; a second casing is arranged in the second drilling hole, and a second well body is formed between the outer wall of the second casing and the inner wall of the second drilling hole;
B, grouting a first delamination area below the first key layer through a second sleeve and a third drill hole; and/or grouting a second delamination area below the second layer of key layer through an annular gap between the inner wall of the first sleeve and the outer wall of the second sleeve.
Preferably, the step a includes the following steps:
step A1, drilling a first borehole at a preset borehole position so that the bottom of the first borehole is located at a preset first distance above the bottom boundary of the second layer of key layers;
step A2, arranging a first sleeve in the first drilling hole, so that the bottom of the first sleeve is flush with the bottom of the first drilling hole;
step A3, forming a first well body between the outer wall of the first casing and the inner wall of the first borehole;
step A4, continuing to drill a second borehole downwards from the inner side of the first casing pipe, so that the bottom of the second borehole is positioned at a preset second distance above the bottom interface of the first layer of key layer;
step A5, arranging a second sleeve in the second drilling hole, so that the bottom of the second sleeve is flush with the bottom of the second drilling hole;
step A6, forming a second well body between the outer wall of the second casing and the inner wall of the second borehole;
step a7, continuing to drill down a third borehole inside the second casing for grouting a first delamination area below the first critical layer.
Preferably, the step B includes the steps of:
step B11, sealing the first sleeve and the second sleeve by using an annular steel plate;
step B12, connecting the first wellhead device with the top end of the second casing, enabling slurry to enter the second casing from the first wellhead device under the action of a grouting pump, and enabling the slurry to flow into the first separation layer area below the first key layer through the second casing and the third drill hole;
and step B13, when the first separation layer area below the first key layer meets the stop injection condition, taking down the first wellhead device, and completing the injection of the first separation layer area.
Preferably, the step B includes the following steps:
step B21, a sleeve cap is additionally arranged at the top end of the second sleeve to seal the second sleeve;
step B22, connecting the second wellhead device with the top end of the first casing, and enabling slurry to enter an annular gap between the inner wall of the first casing and the outer wall of the second casing from the second wellhead device under the action of a grouting pump and finally flow into a second separation layer area below the second layer key layer;
and step B23, when the second separation layer area below the second layer key layer meets the stop injection condition, taking down the second wellhead device, and completing the injection of the second separation layer area.
Preferably, the step B includes the steps of:
step B31, sealing the first sleeve and the second sleeve by using an annular steel plate;
step B32, grouting is carried out on a first delamination area below the first layer key layer: connecting the first wellhead device with the top end of the second casing, enabling slurry to enter the second casing from the first wellhead device under the action of a grouting pump, and enabling the slurry to flow into a first separation layer area below the first key layer through the second casing and a third drill hole;
step B33, when the first separation zone below the first key layer meets the stop injection condition, taking down the first wellhead device, additionally installing a casing cap at the top end of the second casing to seal the second casing, and taking down the annular steel plate;
step B34, grouting a second separation layer area below the second layer key layer: connecting a second wellhead device with the top end of the first sleeve, enabling slurry to enter an annular gap between the inner wall of the first sleeve and the outer wall of the second sleeve from the second wellhead device under the action of a grouting pump, and finally flowing into a second separation layer area below a second key layer;
and step B35, when the second separation layer area below the second layer key layer meets the stop injection condition, taking down the second wellhead device, and completing the injection of the second separation layer area.
Preferably, the step B includes the following steps:
step B41, connecting a second wellhead device with the top end of the first casing;
and step B42, under the action of the grouting pump, enabling the slurry to simultaneously enter the annular gaps in the first casing pipe and between the inner wall of the first casing pipe and the outer wall of the second casing pipe from the second wellhead device, and respectively enter the first separation zone and the second separation zone.
Preferably, when the separation zone below the key layer meets the stop injection condition, clear water is used for replacing slurry inside the sleeve to clean the pipeline, and then the wellhead device is taken down.
Preferably, the first well body and the second well body are formed by grouting cement slurry, and before the second well body is grouted, the using amount of the cement slurry is calculated, so that the top surface of the second well body is lower than the bottom interface of the second layer key layer.
Preferably, the aperture of the first bore is 215.9mm, the aperture of the second bore is 152mm, and the aperture of the third bore is 94 mm.
Preferably, the bottom of the second casing 21 is provided with a float shoe.
As can be seen from the above, the method for grouting the overburden bed separation drill hole can realize grouting of the separation layer with different layers in the same drill hole, so that the grouting time is convenient to master, and the grouting layer can be adjusted at any time; furthermore, the separation layers of multiple layers can be simultaneously grouted, so that the project cost is saved, and the working efficiency is improved.
Drawings
FIG. 1 is a flow chart of a method of overburden borehole grouting in an embodiment of the present invention.
FIG. 2 is a schematic illustration of a borehole and well in an embodiment of the present invention.
FIG. 3 is a schematic diagram of the first delamination area during the slurry injection process of the present invention.
FIG. 4 is a schematic diagram of the second delamination area during the present invention.
FIG. 5 is a schematic diagram of the present invention when grouting delamination areas of different layers.
Detailed Description
In order to make the technical scheme and advantages of the invention more apparent, the invention is further described in detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a flow chart of a method of overburden borehole grouting in an embodiment of the present invention.
As shown in fig. 1, the present invention provides a method for overburden separation layer borehole grouting, comprising the following steps:
In the technical scheme of the invention, various implementation methods can be used for implementing the method for overlying strata abscission layer drilling and grouting. The technical solution of the present invention will be described in detail below by taking several implementation modes as examples.
For example, in a preferred embodiment of the present invention, as shown in fig. 2, the step 11 may include the following steps:
step 111, drilling a first drill hole 1 at a preset drill hole position, so that the bottom of the first drill hole 1 is positioned at a preset first distance above the bottom boundary of the second layer of the key layer;
step 112, arranging a first sleeve 11 in the first drill hole so that the bottom of the first sleeve 11 is flush with the bottom of the first drill hole 1;
113, forming a first well body 12 between the outer wall of the first sleeve 11 and the inner wall of the first drill hole 1;
step 114, continuing to drill the second borehole 2 downwards from the inner side of the first casing 11, so that the bottom of the second borehole 2 is located at a preset second distance above the bottom interface of the first critical layer;
Step 115, arranging a second sleeve 21 in the second borehole, so that the bottom of the second sleeve 21 is flush with the bottom of the second borehole 2;
step 116, forming a second well body 22 between the outer wall of the second casing 21 and the inner wall of the second borehole 2;
and step 117, drilling the third borehole 3 downwards on the inner side of the second casing 21 for grouting the first abscission zone below the first key layer.
Preferably, the preset first distance and the preset second distance may be 1.5 meters.
Through the steps, firstly, a first drill hole 1 is made, the first drill hole 1 is drilled at the preset drill hole position, the first drill hole 1 is drilled to a position 1.5m above the bottom boundary of the second layer of key layer, and a first sleeve 11 is put into the hole bottom of the first drill hole 1; and (3) cementing the first borehole 1, injecting cement slurry between the outer wall of the first casing pipe 11 and the inner wall of the first borehole 1, ensuring that the cement slurry returns out of the ground surface from the annular gap between the inner wall of the first borehole 1 and the first casing pipe 11, and forming a first well body 12 after the cement slurry is solidified. And then, a second drilling hole 2 is made: continuing to drill the second borehole 2 downwards from the inner side of the first casing 11, drilling to a position 1.5m above the bottom interface of the first layer of the key layer, and running a second casing 21 to the bottom of the second borehole 2; and (3) cementing the second borehole 2, accurately calculating the using amount of cement slurry, injecting the cement slurry with the accurate using amount into an annular gap between the inner wall of the second borehole 2 and the outer wall of the second casing 21, and forming a second well body 22 after the cement slurry is solidified, so that the top surface of the second well body is lower than the bottom interface of the second key layer, thereby facilitating the grouting into a second separation zone below the second key layer. And finally, a third drilling hole 3 is made: the third borehole 3 is continued to be drilled down from the inside of the second casing 21 to facilitate grouting of the first delamination area below the first critical layer.
Preferably, the aperture of the first bore 1 may be 215.9mm, the aperture of the second bore 2 may be 152mm, and the aperture of the third bore 3 may be 94 mm.
Preferably, the diameter of the first sleeve 11 may be 139.7 mm; the diameter of the second sleeve 21 may be 177.8 mm.
Preferably, the first well body and the second well body are formed by grouting cement slurry, in order to prevent the cement slurry injected during the second drilling 2 well cementation from being too high, the dosage of the cement slurry needs to be accurately calculated before the second well body is grouted, the top surface of the second well body 22 is lower than the bottom interface of the second layer key layer, and the density of the cement slurry can be controlled to be 1.75g/cm3-1.80g/cm3In the meantime.
Preferably, a float shoe may be provided at the bottom of the second casing 21, so that the slurry can flow only in the direction of the delamination area, thereby preventing the slurry from flowing backward.
When the stratum structure below the first key layer collapses, a first separation layer area is formed below the first key layer; if the first layer of key layer is subjected to bending deformation or small-range fracture, the stratum structure below the second layer of key layer can continue to collapse downwards, so that a second separation layer area is formed, in order to prevent the collapse of the key layer, slurry needs to be injected into the separation layer area to support the key layer and the stratum structure above the key layer, and therefore the stratum is prevented from collapsing downwards.
As an example, in a preferred embodiment of the present invention, the step 12 may include the following embodiments.
Example one
When it is only necessary to perform the grouting to the first delamination area under the first critical layer, as shown in fig. 3, the step 12 may include the following steps:
step 211, sealing the first sleeve 11 and the second sleeve 21 by using an annular steel plate 6;
step 212, connecting the first wellhead device 10 with the top end of the second casing 21, enabling slurry to enter the second casing 21 from the first wellhead device 10 under the action of a grouting pump, and enabling the slurry to flow into a first separation layer area below the first key layer through the second casing 21 and the third drill hole 3;
and step 213, taking down the first wellhead device 10 when the first separation layer area below the first key layer meets the stop injection condition, and completing the grouting of the first separation layer area.
Example two
When grouting is only required to a second delamination area below a second critical layer, as shown in fig. 4, the step 12 may include the steps of:
step 221, additionally installing a sleeve cap 7 at the top end of the second sleeve 21 to seal the second sleeve 21;
step 222, connecting the second wellhead device 20 with the top end of the first casing 11, and under the action of a grouting pump, enabling slurry to enter an annular gap between the inner wall of the first casing 11 and the outer wall of the second casing 21 from the second wellhead device 20 and finally flow into a second separation layer area below a second key layer;
And step 223, when the second separation layer area below the second layer key layer meets the grouting stopping condition, taking down the second wellhead device 20 to complete grouting of the second separation layer area.
Preferably, the inner diameter at the outlet of the first wellhead 10 matches the inner diameter of the second casing 21; the inner diameter at the outlet of the second wellhead 20 matches the inner diameter of the first casing 11.
Preferably, the outlet diameter of the first wellhead 10 may be 139.7 mm; the outlet diameter of the second wellhead 20 may be 177.8 mm.
EXAMPLE III
When the collapse occurs below the key layers of different layers, grouting is needed to be performed on the separation regions of different layers. For example, when it is required to first perform the slurry injection on the first delamination area and then perform the slurry injection on the second delamination area, the step 12 may further include the following steps:
231, sealing the first sleeve 11 and the second sleeve 21 by using an annular steel plate 6;
step 232, grouting is performed on the first separation layer area below the first layer key layer: connecting the first wellhead device 10 with the top end of a second casing 21, enabling slurry to enter the second casing 21 from the first wellhead device 10 under the action of a grouting pump, and enabling the slurry to flow into a first separation layer area below a first key layer through the second casing 21 and a third drill hole 3;
Step 233, when the first separation zone below the first key layer meets the stop injection condition, taking down the first wellhead device 10, additionally installing a casing cap 7 on the top end of the second casing 21 to seal the second casing 21, and taking down the annular steel plate 6;
step 234, grouting a second abscission layer area below the second layer key layer: connecting a second wellhead device 20 with the top end of the first casing 11, and under the action of a grouting pump, enabling slurry to enter an annular gap between the inner wall of the first casing 11 and the outer wall of the second casing 21 from the second wellhead device 20 and finally flow into a second separation layer below a second key layer;
and 235, taking down the second wellhead device 20 when the second separation layer area below the second key layer meets the stop injection condition, and completing grouting of the second separation layer area.
Example four
When collapse occurs below the key layer of different levels and simultaneous grouting needs to be performed on the delamination areas of different levels, as shown in fig. 5, the step 12 may further include the following steps:
241, connecting a second wellhead 20 with the top end of the first casing 11;
and 242, under the action of the grouting pump, enabling the grout to simultaneously enter the first casing 11 and the annular gap between the inner wall of the first casing 11 and the outer wall of the second casing 21 from the second wellhead device 20, and respectively enter the first separation zone and the second separation zone.
The preferred, when the absciss layer district below the key layer satisfies the stop filling condition, can wash the pipeline with the inside thick liquid of clean water replacement sleeve pipe earlier, take off wellhead assembly again to can prevent that the intraductal thick liquid of cover from deposiing and blockking up, keep sheathed tube usability, make things convenient for the later stage to reuse.
In summary, according to the technical scheme of the invention, only one position is needed to be drilled through the method for grouting the overburden separation layer drill hole, so that not only can the overburden separation layer areas at different layers be subjected to layered grouting, but also the simultaneous grouting of the overburden separation layer areas at different layers can be realized, the number of drill holes is reduced, the perforating operation is not needed, the grouting cost is saved, and the construction efficiency is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The method for grouting the overburden separation layer drill hole is characterized by comprising the following steps of:
step A, drilling a hole at a preset position and cementing the hole, so that the second hole is positioned in the first hole, the third hole is positioned in the second hole, the bottom of the second hole is higher than the bottom of the third hole, and the bottom of the first hole is higher than the bottom of the second hole; arranging a first casing in the first drill hole, and forming a first well body between the outer wall of the first casing and the inner wall of the first drill hole; a second casing is arranged in the second drilling hole, and a second well body is formed between the outer wall of the second casing and the inner wall of the second drilling hole;
B, grouting a first delamination area below the first key layer through a second sleeve and a third drill hole; and/or grouting a second delamination area below the second layer of key layer through an annular gap between the inner wall of the first sleeve and the outer wall of the second sleeve.
2. The method according to claim 1, wherein the step A comprises the steps of:
step A1, drilling a first borehole at a preset borehole position so that the bottom of the first borehole is located at a preset first distance above the bottom boundary of the second layer of key layers;
step A2, arranging a first sleeve in the first drilling hole, so that the bottom of the first sleeve is flush with the bottom of the first drilling hole;
step A3, forming a first well body between the outer wall of the first casing and the inner wall of the first borehole;
step A4, continuously drilling a second drilling hole downwards from the inner side of the first casing pipe, so that the bottom of the second drilling hole is positioned at a preset second distance above the bottom interface of the first layer of key layer;
step A5, arranging a second sleeve in the second drilling hole, so that the bottom of the second sleeve is flush with the bottom of the second drilling hole;
step A6, forming a second well body between the outer wall of the second casing and the inner wall of the second borehole;
Step a7, continuing to drill down a third borehole inside the second casing for grouting a first delamination area below the first critical layer.
3. The method of claim 1, wherein step B comprises the steps of:
step B11, sealing the first sleeve and the second sleeve by using an annular steel plate;
step B12, connecting the first wellhead device with the top end of the second casing, enabling slurry to enter the second casing from the first wellhead device under the action of a grouting pump, and enabling the slurry to flow into the first separation layer area below the first key layer through the second casing and the third drill hole;
and step B13, when the first separation layer area below the first key layer meets the stop injection condition, taking down the first wellhead device, and completing the injection of the first separation layer area.
4. The method of claim 1, wherein step B comprises the steps of:
step B21, a sleeve cap is additionally arranged at the top end of the second sleeve to seal the second sleeve;
step B22, connecting the second wellhead device with the top end of the first casing, and enabling slurry to enter an annular gap between the inner wall of the first casing and the outer wall of the second casing from the second wellhead device under the action of a grouting pump and finally flow into a second separation layer area below the second layer key layer;
And step B23, when the second separation layer area below the second layer key layer meets the stop grouting condition, taking down the second wellhead device to complete grouting of the second separation layer area.
5. The method of claim 1, wherein step B comprises the steps of:
step B31, sealing the first sleeve and the second sleeve by using an annular steel plate;
step B32, grouting is carried out on a first delamination area below the first layer key layer: connecting the first wellhead device with the top end of the second casing, enabling slurry to enter the second casing from the first wellhead device under the action of a grouting pump, and enabling the slurry to flow into a first separation layer area below the first key layer through the second casing and a third drill hole;
step B33, when the first separation zone below the first key layer meets the stop injection condition, taking down the first wellhead device, additionally installing a casing cap at the top end of the second casing to seal the second casing, and taking down the annular steel plate;
step B34, grouting is carried out on a second delamination area below the second layer key layer: connecting a second wellhead device with the top end of the first sleeve, enabling slurry to enter an annular gap between the inner wall of the first sleeve and the outer wall of the second sleeve from the second wellhead device under the action of a grouting pump, and finally flowing into a second separation layer area below a second key layer;
And step B35, when the second separation layer area below the second layer key layer meets the stop injection condition, taking down the second wellhead device, and completing the injection of the second separation layer area.
6. The method of claim 1, wherein step B comprises the steps of:
step B41, connecting a second wellhead device with the top end of the first casing;
and step B42, under the action of the grouting pump, enabling the slurry to simultaneously enter the annular gaps in the first casing pipe and between the inner wall of the first casing pipe and the outer wall of the second casing pipe from the second wellhead device, and respectively enter the first separation zone and the second separation zone.
7. A method according to any one of claims 3 to 6, wherein when the delamination area below the key layer meets the shut-in condition, the slurry inside the casing is replaced with clean water to clean the pipe and the wellhead is removed.
8. The method of claim 1, wherein the first well body and the second well body are cemented with cement slurry, and wherein prior to cementing the second well body, the amount of cement slurry used is calculated such that the top surface of the second well body is below the bottom boundary of the second key layer.
9. The method of claim 1, wherein the first bore has an aperture of 215.9mm, the second bore has an aperture of 152mm, and the third bore has an aperture of 94 mm.
10. Method according to claim 1, characterized in that the bottom of the second casing 21 is provided with a float shoe.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483172A (en) * | 2022-01-18 | 2022-05-13 | 安徽理工大学 | Method for reducing subsidence of covered rock separation layer by slip casting with cap when wearing shoes |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2135740C1 (en) * | 1997-11-18 | 1999-08-27 | Открытое акционерное общество "ПермНИПИнефть" | Method for selective isolation of productive bed at cementation of production string |
| RU2345212C1 (en) * | 2007-06-04 | 2009-01-27 | Государственное образовательное учреждение высшего профессионального образования "Тюменский государственный нефтегазовый университет" | Casting method of cementing |
| CN103216236A (en) * | 2013-03-13 | 2013-07-24 | 中国矿业大学(北京) | Method for reducing subsidence of stope overburden bed separation by grouting |
| CN104929565A (en) * | 2014-12-18 | 2015-09-23 | 安徽恒源煤电股份有限公司 | Double-layered grouting guide pipe |
| CN107044280A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of bored grouting detection method of mining overburden absciss layer distribution characteristics |
| JP2018096146A (en) * | 2016-12-15 | 2018-06-21 | 前田建設工業株式会社 | Support layer confirmation method and foundation improvement method |
| CN110671145A (en) * | 2019-10-24 | 2020-01-10 | 中国煤炭地质总局勘查研究总院 | Large-mining-width thick coal seam mining composite grouting method |
| CN111365003A (en) * | 2020-03-11 | 2020-07-03 | 西安科技大学 | Combined subsidence reducing method for grouting of separation layer inner bag and plugging of water flowing fractured zone |
| CN111663918A (en) * | 2020-07-10 | 2020-09-15 | 中勘资源勘探科技股份有限公司 | Coal mining ground grouting process and grouting structure |
| CN113605970A (en) * | 2021-08-30 | 2021-11-05 | 中国矿业大学 | Overlying strata isolation grouting filling method for coal gangue underground emission reduction |
| US20220025605A1 (en) * | 2020-07-22 | 2022-01-27 | Zhejiang University | High strength grouting method for single pile rock-socketed foundation of weakly weathered bed rock for offshare wind power |
-
2022
- 2022-02-22 CN CN202210161573.7A patent/CN114517659A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2135740C1 (en) * | 1997-11-18 | 1999-08-27 | Открытое акционерное общество "ПермНИПИнефть" | Method for selective isolation of productive bed at cementation of production string |
| RU2345212C1 (en) * | 2007-06-04 | 2009-01-27 | Государственное образовательное учреждение высшего профессионального образования "Тюменский государственный нефтегазовый университет" | Casting method of cementing |
| CN103216236A (en) * | 2013-03-13 | 2013-07-24 | 中国矿业大学(北京) | Method for reducing subsidence of stope overburden bed separation by grouting |
| CN104929565A (en) * | 2014-12-18 | 2015-09-23 | 安徽恒源煤电股份有限公司 | Double-layered grouting guide pipe |
| JP2018096146A (en) * | 2016-12-15 | 2018-06-21 | 前田建設工業株式会社 | Support layer confirmation method and foundation improvement method |
| CN107044280A (en) * | 2017-06-22 | 2017-08-15 | 中国矿业大学 | A kind of bored grouting detection method of mining overburden absciss layer distribution characteristics |
| CN110671145A (en) * | 2019-10-24 | 2020-01-10 | 中国煤炭地质总局勘查研究总院 | Large-mining-width thick coal seam mining composite grouting method |
| CN111365003A (en) * | 2020-03-11 | 2020-07-03 | 西安科技大学 | Combined subsidence reducing method for grouting of separation layer inner bag and plugging of water flowing fractured zone |
| CN111663918A (en) * | 2020-07-10 | 2020-09-15 | 中勘资源勘探科技股份有限公司 | Coal mining ground grouting process and grouting structure |
| US20220025605A1 (en) * | 2020-07-22 | 2022-01-27 | Zhejiang University | High strength grouting method for single pile rock-socketed foundation of weakly weathered bed rock for offshare wind power |
| CN113605970A (en) * | 2021-08-30 | 2021-11-05 | 中国矿业大学 | Overlying strata isolation grouting filling method for coal gangue underground emission reduction |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483172A (en) * | 2022-01-18 | 2022-05-13 | 安徽理工大学 | Method for reducing subsidence of covered rock separation layer by slip casting with cap when wearing shoes |
| CN114483172B (en) * | 2022-01-18 | 2022-09-06 | 安徽理工大学 | Method for reducing subsidence by slip casting of overlying strata separation layer in shoe wearing and hat wearing manner |
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