CN112324339B - Novel casing running process for large-diameter through drilling - Google Patents
Novel casing running process for large-diameter through drilling Download PDFInfo
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- CN112324339B CN112324339B CN202011205896.9A CN202011205896A CN112324339B CN 112324339 B CN112324339 B CN 112324339B CN 202011205896 A CN202011205896 A CN 202011205896A CN 112324339 B CN112324339 B CN 112324339B
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000005553 drilling Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000002002 slurry Substances 0.000 claims abstract description 9
- 230000000903 blocking effect Effects 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 239000004568 cement Substances 0.000 claims description 13
- 239000003245 coal Substances 0.000 claims description 7
- 229920000742 Cotton Polymers 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000011440 grout Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000005465 channeling Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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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- 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)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a novel casing running process for large-diameter through drilling, which comprises the following steps: A. drilling: penetrating the roadway and detaching the drill bit; B. casing pipe setting: connecting a sleeve at the tail part of a drill rod of the drilling machine, pulling out the drill, pulling the sleeve into a hole along with the drill rod, stopping pulling, connecting another sleeve, pulling out the drill, pulling the sleeve into the hole along with the drill rod, stopping pulling, and repeating the steps; C. fixing: after the first sleeve is pulled out of the hole, installing a flange at the tail part of the sleeve at the lowest part; D. plugging: blocking a gap between the casing pipe at the lowest part and the inner wall of the drill hole; E. grouting: grouting the gap between the sleeve and the inner wall of the drill hole, and finishing grouting after the hole opening returns; F. disassembling the drill rod: and after the slurry is solidified, the drill rod is detached, and the single-hole sealing work is completed. The invention has the advantages that: the drill pulling and casing running are completed synchronously, the safety of the casing running process is improved, the labor intensity of workers is reduced, and the requirement of quick casing running is met.
Description
Technical Field
The invention relates to the field of coal mine gas extraction, in particular to a novel casing running process for large-diameter through drilling.
Background
In the production of colliery in the pit, in order to be related to two adjacent roadways, need to construct partly drilling and carry out the link up between the roadway, the perforating hole mainly used cable laying, cement slip casting, carry material, discharge aspect function such as gas. Especially, the large-diameter through drilling hole, when the casing is put down, the requirement of quick casing-down cannot be met by manpower due to the fact that the casing is heavy in weight. In the prior art, there is also a mechanical device for casing running, for example, chinese patent application with publication number CN111364918A discloses a casing running device, which includes a mounting seat, a guide tube is disposed on one side of the mounting seat, two ends of the guide tube are conducted, a clamping strip is hinged on the guide tube, the clamping strip is driven by a driving mechanism disposed on the mounting seat or on the guide tube, and the clamping strip swings into the guide tube to clamp the casing in the guide tube. Adopt the device can prevent that the sleeve pipe from scurrying under because of gravity and hindering the people, improved the security of casing pipe. However, the weight of the anti-casing pipe is limited, so that the operation of casing pipes of all specifications cannot be met, and the casing pipe setting process in the prior art is time-consuming and labor-consuming, has low safety and cannot meet the requirement of quickly setting the casing pipe.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the casing running process in the prior art cannot meet the technical problem of quick casing running requirements.
The invention solves the technical problems through the following technical means: a novel casing running process for large-diameter through drilling comprises the following steps:
A. drilling: drilling by using a drilling machine, penetrating the roadway and detaching the drill bit;
B. casing pipe setting: connecting a sleeve at the tail part of a drill rod of a drilling machine, then tripping the drill, pulling the sleeve into a hole along with the drill rod, stopping pulling, connecting another sleeve at the tail part of the last sleeve, then tripping the drill, pulling the sleeve into the hole along with the drill rod, stopping pulling, and repeating the steps until the first sleeve is pulled out of the hole opening;
C. fixing: after being pulled out of the hole opening, the first casing pipe is kept connected with the drill rod, and a flange is installed at the tail part of the casing pipe at the lowest part;
D. plugging: blocking a gap between the casing pipe at the lowest part and the inner wall of the drill hole;
E. grouting: grouting the gap between the sleeve and the inner wall of the drill hole, and finishing grouting after the hole opening returns;
F. disassembling the drill rod: and after the slurry is solidified, the drill rod is detached, and the single-hole sealing work is completed.
In the practical application of the novel casing running process for the large-diameter through drilling, the work of pulling out and running the casing is completed synchronously, so that the safety of the casing running process is improved, and the labor intensity of workers is reduced. Compared with the prior art, the method comprises the following steps: saving 1/2 running casing time; the novel casing running process can complete the work of drilling, casing running, hole sealing and grouting within a small time (8 hours); in the old casing running process, only the casing running link needs a small time, and other hole sealing and grouting work needs a small time, which is 16 hours in total; and (3) comparison on efficiency: the novel casing running process has stronger working continuity and mainly shows that the links of drilling and casing running are completed synchronously, so that the construction time is saved; and (4) safety comparison: the novel casing running process is safer. The casing is connected to the drill rod and is pulled quickly into the hole by the drill rod. The old process needs to fix the sleeve by using a puttee, lift the sleeve by using a chain block and put the sleeve into a hole. The hand chain block fixing and the puttee fixing sleeves are safety risk points, and the possibility of the sleeves running downwards exists.
Preferably, in the step A, the drill bit is disassembled by using a chain wrench;
in step B, a chain wrench is used to tighten the bushing.
Preferably, in step C, after the first casing is pulled out of the hole, a downward movement preventing member is installed outside the casing outside the hole, and the size of the downward movement preventing member is larger than that of the hole.
The down-flee preventing piece is fastened outside the sleeve, the size of the down-flee preventing piece is larger than that of the orifice, and when the sleeve flees down, the down-flee preventing piece can be clamped in the orifice, so that the sleeve is prevented from further fleeing down, and the down-flee preventing function is achieved.
Preferably, the downward movement preventing piece comprises two clamping blocks clamped on the sleeve, and the two clamping blocks are connected through bolts and nuts.
Preferably, an anti-slip pad is arranged between the sleeve and the clamping block.
Preferably, in the step C, the flange is connected to the roof bolt through a steel wire rope.
When the sleeve pipe has the tendency of scurrying down, the flange can be strained to wire rope, also can play the effect that prevents that the sleeve pipe from scurrying down.
Preferably, in the step D, polyurethane and cotton yarn are used for blocking.
Preferably, in the step E, during grouting, the grouting pipe extends into a gap between the sleeve and the inner wall of the drill hole, and the end part of the grouting pipe extends to the position below the coal stopping point.
And grouting is started from the lower part of the coal stopping point, and the slurry is gradually filled in the gap, so that the filling effect is good.
And preferably, in the step E, during grouting, cement grout is adopted for grouting, and the water-cement mass ratio of the cement grout is 0.7: 1.
And preferably, in the step F, the drill rod is detached after the cement is solidified for 12 hours.
The invention has the advantages that:
1. in the practical application of the novel casing running process for the large-diameter through drilling, the work of pulling out and running the casing is completed synchronously, so that the safety of the casing running process is improved, and the labor intensity of workers is reduced. Compared with the prior art, the method comprises the following steps: saving 1/2 running casing time; the novel casing running process can complete the work of drilling, casing running, hole sealing and grouting within a small time (8 hours); in the old casing running process, only the casing running link needs a small time, and other hole sealing and grouting work needs a small time, which is 16 hours in total; and (3) comparison on efficiency: the novel casing running process has stronger working continuity and mainly shows that the links of drilling and casing running are completed synchronously, so that the construction time is saved; and (4) safety comparison: the novel casing running process is safer. The casing is connected to the drill rod and is pulled quickly into the hole by the drill rod. The old process needs to fix the sleeve by using a puttee, lift the sleeve by using a chain block and put the sleeve into a hole. The hand chain block fixing and the puttee fixing sleeves are safety risk points, and the possibility of the sleeves running downwards exists.
2. The down-flee preventing piece is fastened outside the sleeve, the size of the down-flee preventing piece is larger than that of the orifice, and when the sleeve flees down, the down-flee preventing piece can be clamped in the orifice, so that the sleeve is prevented from further fleeing down, and the down-flee preventing function is achieved.
3. When the sleeve pipe has the tendency of scurrying down, the flange can be strained to wire rope, also can play the effect that prevents that the sleeve pipe from scurrying down.
4. And grouting is started from the lower part of the coal stopping point, and the slurry is gradually filled in the gap, so that the filling effect is good.
Drawings
FIG. 1 is a schematic illustration of casing running in an embodiment of the present invention;
wherein the content of the first and second substances,
the device comprises a sleeve-1, a flange-2, a steel wire rope-3, an anchor rod-4, a downward movement preventing part-5 and a grouting pipe-6.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a novel casing running process for large-diameter through drilling comprises the following steps:
A. drilling: drilling by using a drilling machine to penetrate a roadway, namely, after reaming by adopting a phi 196mm guiding reaming bit, disassembling the bit by using a chain wrench; in the art, chain wrenches, i.e. chain whips, are known in the art and are commercially available.
In the embodiment, the drilling machine adopts a ZDY3200S type drilling machine;
the specification of the drill rod is as follows: phi 63.5 mm/phi 73mm rib drill rods, 1.0 m/root;
the specification of the drill bit is as follows: a phi 94mm composite sheet drill bit, a phi 113mm expanding drill bit, a phi 153mm guiding expanding drill bit, a phi 196mm guiding expanding drill bit, a phi 153mm guiding expanding drill bit and a phi 196mm guiding expanding drill bit.
B. Casing pipe setting: connecting sleeves 1 at the tail part of a drill rod of a drilling machine, fastening the sleeves 1 by using a chain wrench, wherein each sleeve 1 is 1m long and 196mm in diameter, then tripping, lifting the sleeve 1 into a hole along with the drill rod, stopping lifting, connecting another sleeve 1 at the tail part of the last sleeve 1, tripping, lifting the sleeve 1 into the hole along with the drill rod, stopping lifting, and repeating the steps until the first sleeve 1 is pulled out of the hole;
C. fixing: after the first casing pipe 1 is pulled out of the hole, the first casing pipe 1 is kept connected with a drill rod, a flange 2 is mounted at the tail part of the lowermost casing pipe 1, and the flange 2 is connected to a roof anchor rod 4 through a steel wire rope 3.
After the first casing 1 is pulled out of the opening, a run-down preventing member 5, i.e., a "legging", is installed outside the casing 1 outside the opening, and the size of the run-down preventing member 5 is larger than that of the opening. The anti-downward-movement piece 5 comprises two clamping blocks clamped on the sleeve 1, and the two clamping blocks are connected through bolts and nuts. And an anti-slip pad is arranged between the sleeve 1 and the clamping block. Specifically, the clamping block can adopt a semicircular hoop.
D. Plugging: blocking a gap between the casing 1 at the bottom and the inner wall of the drill hole, and plugging by using polyurethane and cotton yarn; the specific plugging method comprises the following steps: the polyurethane A, B is mixed, then the cotton yarn is immersed in the mixture, and then the cotton yarn dipped with the polyurethane is inserted into the gap between the sleeve 1 and the inner wall of the drill hole, thereby realizing the plugging.
E. Grouting: grouting the gap between the sleeve 1 and the inner wall of the drill hole, and finishing grouting after the hole opening returns; during grouting, the grouting pipe 6 extends into a gap between the sleeve 1 and the inner wall of the drill hole, and the end part of the grouting pipe 6 extends to the position below the coal stopping point. During grouting, cement slurry is adopted for grouting, and the water-cement mass ratio of the cement slurry is 0.7: 1.
F. Disassembling the drill rod: and after the slurry is solidified, the drill rod is detached, and the single-hole sealing work is completed. Specifically, after the cement is solidified for 12 hours, the drill rod is detached.
The working principle is as follows:
in the practical application of the novel casing running process for the large-diameter through drilling, the work of pulling out and running the casing is completed synchronously, so that the safety of the casing running process is improved, and the labor intensity of workers is reduced. Compared with the prior art, the method comprises the following steps: saving 1/2 running casing time; the novel casing running process can complete the work of drilling, casing running, hole sealing and grouting within a small time (8 hours); in the old casing running process, only the casing running link needs a small time, and other hole sealing and grouting work needs a small time, which is 16 hours in total; and (3) comparison on efficiency: the novel casing running process has stronger working continuity and mainly shows that the links of drilling and casing running are completed synchronously, so that the construction time is saved; and (4) safety comparison: the novel casing running process is safer. The casing is connected to the drill rod and is pulled quickly into the hole by the drill rod. The old process needs to fix the sleeve by using a puttee, lift the sleeve by using a chain block and put the sleeve into a hole. The hand chain block fixing and the puttee fixing sleeves are safety risk points, and the possibility of the sleeves running downwards exists.
The anti-channeling member 5 is fastened outside the casing 1, and the size of the anti-channeling member is larger than that of the orifice, so that when the casing 1 is channeled downwards, the anti-channeling member 5 can be clamped in the orifice, the casing 1 is prevented from being further channeled downwards, and the anti-channeling member plays a role in preventing channeling downwards. When the sleeve 1 has a downward movement tendency, the steel wire rope 3 can tighten the flange 2 and also can play a role in preventing the sleeve 1 from downward movement. And grouting is started from the lower part of the coal stopping point, and the slurry is gradually filled in the gap, so that the filling effect is good.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A novel casing running process for large-diameter through drilling is characterized in that: the method comprises the following steps:
A. drilling: drilling by using a drilling machine, penetrating the roadway and detaching the drill bit;
B. casing pipe setting: connecting a sleeve (1) at the tail part of a drill rod of a drilling machine, then tripping, pulling the sleeve (1) into a hole along with the drill rod, stopping pulling, connecting another sleeve (1) at the tail part of the last sleeve (1), then tripping, pulling the sleeve (1) into the hole along with the drill rod, stopping pulling, and repeating the steps until the first sleeve (1) is pulled out of the hole;
C. fixing: after being pulled out of the hole, the first casing (1) is kept connected with a drill rod, and a flange (2) is mounted at the tail part of the casing (1) at the lowest part; connecting the flange (2) to a roof anchor rod (4) through a steel wire rope (3);
after the first sleeve (1) is pulled out of the orifice, a downward movement preventing piece (5) is arranged outside the sleeve (1) outside the orifice, and the size of the downward movement preventing piece (5) is larger than that of the orifice;
the downward movement preventing piece (5) comprises two clamping blocks clamped on the sleeve (1), and the two clamping blocks are connected through bolts and nuts;
an anti-skid pad is arranged between the sleeve (1) and the clamping block;
D. plugging: blocking a gap between the casing (1) at the lowest part and the inner wall of the drill hole;
E. grouting: grouting the gap between the sleeve (1) and the inner wall of the drill hole, and finishing grouting after the hole opening returns;
F. disassembling the drill rod: and after the slurry is solidified, the drill rod is detached, and the single-hole sealing work is completed.
2. The novel casing running process for the large-diameter through borehole according to claim 1, characterized in that: in the step A, a chain wrench is used for disassembling the drill bit;
in step B, the sleeve (1) is tightened using a chain wrench.
3. The novel casing running process for the large-diameter through borehole according to claim 1, characterized in that: and D, sealing by using polyurethane and cotton yarn.
4. The novel casing running process for the large-diameter through borehole according to claim 1, characterized in that: and E, during grouting, extending the grouting pipe (6) into a gap between the sleeve (1) and the inner wall of the drilled hole, and extending the end part of the grouting pipe (6) to the position below the coal stopping point.
5. The novel casing running process for the large-diameter through borehole according to claim 1, characterized in that: and E, grouting by using cement grout in the grouting process, wherein the water-cement mass ratio of the cement grout is 0.7: 1.
6. The novel casing running process for the large-diameter through borehole according to claim 5, characterized in that: and in the step F, after the cement is solidified for 12 hours, the drill rod is detached.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011205896.9A CN112324339B (en) | 2020-11-02 | 2020-11-02 | Novel casing running process for large-diameter through drilling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011205896.9A CN112324339B (en) | 2020-11-02 | 2020-11-02 | Novel casing running process for large-diameter through drilling |
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| CN112324339B true CN112324339B (en) | 2022-04-01 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113266305B (en) * | 2021-07-01 | 2023-04-11 | 中煤科工集团西安研究院有限公司 | Close-range drainage drilling orifice pipe device for accumulated water in coal mine goaf and consolidation method thereof |
| CN113445918A (en) * | 2021-08-03 | 2021-09-28 | 淮南矿业(集团)有限责任公司 | Method for casing large-diameter life-saving hole |
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| CN111364918A (en) * | 2020-04-15 | 2020-07-03 | 淮南矿业(集团)有限责任公司 | Casing running device |
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2020
- 2020-11-02 CN CN202011205896.9A patent/CN112324339B/en active Active
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| EP0890707A1 (en) * | 1997-07-11 | 1999-01-13 | Heerema Ondergrondse Infrastructuren B.V. | Method, system and device for building a wall in the ground |
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