CN214836253U - Well cementation device for large-diameter drilling same-diameter segmented pipe discharging - Google Patents
Well cementation device for large-diameter drilling same-diameter segmented pipe discharging Download PDFInfo
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- CN214836253U CN214836253U CN202121245342.1U CN202121245342U CN214836253U CN 214836253 U CN214836253 U CN 214836253U CN 202121245342 U CN202121245342 U CN 202121245342U CN 214836253 U CN214836253 U CN 214836253U
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Abstract
The utility model discloses a well cementing device for large-caliber drilling same-diameter segmented pipe laying, which comprises a well bore vertically arranged and a roadway transversely arranged at the lower end of the well bore, wherein the lower end of the well bore is communicated with the roadway, a sleeve is vertically arranged in the well bore, and an annular gap is arranged between the casing and the hole wall of the well hole, the upper end of the annular gap is provided with a first annular plugging piece, the lower end of the annular gap is provided with a second annular plugging piece, the upper end and the lower end of the annular gap are respectively plugged and enclosed by the first annular plugging piece and the second annular plugging piece to form a closed annular cavity, the annular cavity is provided with a pulp inlet communicated with the interior of the annular cavity, the upper end of the annular cavity is provided with an overflow port communicated with the interior of the annular cavity, the structure is simple, so that the installation of the casing pipe is convenient, and the annular gap between the casing pipe and the well hole can be conveniently filled with the mud.
Description
Technical Field
The utility model belongs to the mine field especially relates to a well cementation device of big-caliber drilling with footpath segmentation low tube.
Background
The gas outburst is one of the most serious safety problems in coal mines, as the deep mining depth of the mines in China is gradually deepened, more and more mines and coal beds are subjected to the gas outburst, and meanwhile, the complex geological environment and mining conditions of the coal mines in China are also important factors causing multiple gas accidents. Therefore, in order to ensure the safe production of mines and reduce the occurrence of gas accidents, the gas must be prevented and controlled. At present, a part of mines begin to adopt a large-caliber gas direct-discharging hole technology to prevent and control gas, and because the technology adopts a long-distance drilling mode, the construction period is short, the drainage effect is good, the technology begins to be widely popularized in a plurality of mines, and gradually becomes a main technical means for preventing and controlling gas in the mines. Some mines have built chambers into which debris such as rock debris, mud, etc. fall to avoid the gas direct-discharge construction process. Therefore, the drilling needs to be constructed in two sections, the first step is to construct the hole to a certain position (the reserved section can bear upper pressure) away from the top plate of the chamber by using a conventional drilling process, and then a casing is put into the hole, and cement is used for cementing the hole. And constructing the reserved hole section to the designed aperture by using a reverse well technology, and installing the reserved section casing to a preset position by adopting a lifting-up and lifting-up method, wherein cement cementing is limited due to underground space limitation.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide a simple structure, and construction convenience's a well cementation device of big-caliber well drilling with footpath segmentation low tube.
In order to achieve the above purpose, the technical solution of the present invention is as follows: a well cementation device for a large-caliber drilling same-diameter segmented pipe descending comprises a well bore and a roadway, wherein the well bore is vertically arranged, the roadway is transversely arranged at the lower end of the well bore, the lower end of the well bore is communicated with the roadway, a sleeve is vertically arranged in the well bore, an annular gap is formed between the sleeve and the wall of the well bore, a first annular sealing piece is arranged at the upper end of the annular gap, a second annular sealing piece is arranged at the lower end of the annular gap, the first annular sealing piece and the second annular sealing piece respectively seal and enclose the upper end and the lower end of the annular gap to form a closed annular cavity, a grout inlet communicated with the interior of the annular cavity is formed in the annular cavity, and an overflow port communicated with the interior of the annular cavity is formed in the upper end of the annular cavity.
The beneficial effects of the above technical scheme are that: the structure is simple, so that the installation of the casing pipe is convenient, and the annular gap between the casing pipe and the well hole can be conveniently filled with the mud.
In the technical scheme, the first annular blocking piece is a concrete piece poured at the upper end inside the annular gap.
The beneficial effects of the above technical scheme are that: its simple structure can carry out preliminary pre-fixing to first annular shutoff piece through concrete spare.
In the above technical solution, the second annular blocking piece is an annular sealing plate.
The beneficial effects of the above technical scheme are that: the structure is simple.
Still include an overflow pipe among the above-mentioned technical scheme, the overflow pipe is vertical to be set up in the ring cavity, and its upper end extends to and is close to first annular shutoff piece, its lower extreme downwardly extending to wear out to in the tunnel, the lower extreme of overflow pipe constitutes promptly the overflow mouth.
The beneficial effects of the above technical scheme are that: this allows the overflow tube to be inserted through the second closure without any damage to the first closure and the sleeve.
The technical scheme also comprises grouting equipment, wherein a slurry outlet of the grouting equipment is communicated with a slurry inlet of the annular cavity.
The beneficial effects of the above technical scheme are that: so can use grouting equipment to carry out pressure slip casting for grouting rate is faster, makes mud disperse more evenly in the ring chamber simultaneously.
In the technical scheme, the slurry inlet is arranged at the lower end of the annular cavity, and the slurry injecting equipment is arranged above the annular cavity.
The beneficial effects of the above technical scheme are that: so that the mud is piled up from the lower phase to fill in the ring cavity, and the mud is filled more compactly.
The technical scheme is that the device further comprises a collecting box, the collecting box is arranged in the roadway, and an overflow port of the annular cavity is communicated with the collecting box.
The beneficial effects of the above technical scheme are that: so can be convenient carry out recovery processing to the mud that overflows, avoid the mud flow of overflow to the tunnel in.
Drawings
FIG. 1 is a simplified structural diagram of a well cementing device for large-diameter drilling and pipe laying in the same-diameter section according to an embodiment of the present invention;
fig. 2 is an exploded view of a casing, a first annular seal, and a second annular seal in a well and a roadway according to an embodiment of the present invention.
In the figure: 1 well hole, 2 roadways, 3 sleeves, 4 first annular plugging pieces, 5 second annular plugging pieces, 6 annular cavities, 7 overflow pipes, 8 grouting equipment and 9 collecting boxes.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 and fig. 2, the embodiment provides a well cementation device for large-caliber drilling same-diameter segmented pipe laying, which includes a vertically arranged well bore 1 and a roadway 2 transversely arranged at the lower end of the well bore 1, the lower end of the well bore 1 is communicated with the roadway 2, a casing 3 is vertically arranged in the well bore 1, an annular gap is formed between the casing 3 and the wall of the well bore 1, a first annular plugging member 4 is arranged at the upper end of the annular gap, a second annular plugging member 5 is arranged at the lower end of the annular gap, the first annular plugging member 4 and the second annular plugging member 5 respectively plug and enclose the upper end and the lower end of the annular gap to form a closed annular cavity 6, a slurry inlet communicated with the interior of the annular cavity 6 is arranged on the annular cavity 6, an overflow port communicated with the interior of the annular cavity 6 is arranged at the upper end of the annular cavity, the structure is simple, and thus the installation of the casing is facilitated, meanwhile, the annular gap between the casing and the well hole can be conveniently filled with the mud. The diameter of the bore hole of the large bore well in this embodiment is about 500 mm.
In the technical scheme, the first annular plugging piece 4 is a concrete piece poured at the upper end inside the annular gap, the structure is simple, and the first annular plugging piece can be preliminarily fixed through the concrete piece.
In the above technical solution, the second annular blocking piece 5 is an annular sealing plate, and the structure is simple.
Still include an overflow pipe 7 among the above-mentioned technical scheme, overflow pipe 7 vertical setting in the ring chamber 6, and its upper end extends to being close to first annular shutoff piece 4, and its lower extreme downwardly extending to wear out to in the tunnel 2, the lower extreme of overflow pipe 7 constitutes promptly the overflow mouth, so can not need to carry out any destruction to first shutoff piece and sleeve pipe, only need make overflow pipe lower extreme run through the second shutoff piece can.
Still include among the above-mentioned technical scheme slip casting equipment 8, the thick liquids export of slip casting equipment 8 with the grout inlet intercommunication of ring chamber 6, so can use slip casting equipment to carry out pressure slip casting for grouting rate is faster, makes mud disperse more evenly in the ring chamber simultaneously.
In the technical scheme, the slurry inlet is arranged at the lower end of the annular cavity 6, and the grouting equipment 8 is arranged on the ground surface above the annular cavity 6, so that slurry is filled in the annular cavity from bottom to top in a stacked mode, and the slurry is filled more compactly.
Still include collecting box 9 among the above-mentioned technical scheme, collecting box 9 is arranged in the tunnel 2, just the overflow mouth of ring chamber 6 with communicate in the collecting box 9, so can be convenient carry out recovery processing to the mud that overflows, avoid the mud of overflow to flow to in the tunnel.
Wherein the slurry inlet of the cavity is arranged on the second annular blocking piece 5.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. A well cementation device for large-caliber drilling same-diameter subsection pipe laying is characterized by comprising a well hole (1) which is vertically arranged and a roadway (2) which is transversely arranged at the lower end of the well hole (1), the lower end of the well hole (1) is communicated with the roadway (2), a sleeve (3) is vertically arranged in the well hole (1), and an annular gap is arranged between the casing (3) and the hole wall of the well hole (1), the upper end of the annular gap is provided with a first annular sealing piece (4), the lower end of the annular gap is provided with a second annular sealing piece (5), the first annular sealing piece (4) and the second annular sealing piece (5) respectively seal the upper end and the lower end of the annular gap and enclose to form a closed annular cavity (6), the annular cavity (6) is provided with a slurry inlet communicated with the interior of the annular cavity, and the upper end of the annular cavity (6) is provided with an overflow port communicated with the interior of the annular cavity.
2. The device for cementing a large-caliber drilling same-diameter segmented lower pipe according to claim 1, wherein the first annular plugging piece (4) is a concrete piece poured at the upper end inside the annular gap.
3. The device for cementing a large-caliber drilling same-caliber segmented lower pipe according to claim 1, wherein the second annular plugging piece (5) is an annular sealing plate.
4. The well cementation device for the large-caliber drilling same-diameter subsection pipe descending of any one of claims 1 to 3, further comprising an overflow pipe (7), wherein the overflow pipe (7) is vertically arranged in the annular cavity (6), the upper end of the overflow pipe extends to be close to the first annular plugging piece (4), the lower end of the overflow pipe extends downwards to penetrate out of the roadway (2), and the lower end of the overflow pipe (7) forms the overflow port.
5. The well cementation device for the large-caliber drilling same-diameter subsection pipe descending of claim 4, characterized by further comprising a grouting device (8), wherein a slurry outlet of the grouting device (8) is communicated with a slurry inlet of the annular cavity (6).
6. The well cementation device for the large-caliber drilling same-diameter subsection pipe descending of the claim 5, wherein the slurry inlet is arranged at the lower end of the annular cavity (6), and the grouting equipment (8) is arranged above the annular cavity (6).
7. The well cementation device for the large-caliber drilling same-diameter subsection pipe descending of claim 4, further comprising a collection box (9), wherein the collection box (9) is arranged in the roadway (2), and an overflow port of the annular cavity (6) is communicated with the collection box (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121245342.1U CN214836253U (en) | 2021-06-04 | 2021-06-04 | Well cementation device for large-diameter drilling same-diameter segmented pipe discharging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121245342.1U CN214836253U (en) | 2021-06-04 | 2021-06-04 | Well cementation device for large-diameter drilling same-diameter segmented pipe discharging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214836253U true CN214836253U (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121245342.1U Expired - Fee Related CN214836253U (en) | 2021-06-04 | 2021-06-04 | Well cementation device for large-diameter drilling same-diameter segmented pipe discharging |
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| Country | Link |
|---|---|
| CN (1) | CN214836253U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387793A (en) * | 2022-08-10 | 2022-11-25 | 中煤科工集团西安研究院有限公司 | Coal mine area major diameter through roadway hole final hole cementing method |
-
2021
- 2021-06-04 CN CN202121245342.1U patent/CN214836253U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387793A (en) * | 2022-08-10 | 2022-11-25 | 中煤科工集团西安研究院有限公司 | Coal mine area major diameter through roadway hole final hole cementing method |
| CN115387793B (en) * | 2022-08-10 | 2023-05-12 | 中煤科工集团西安研究院有限公司 | Coal mine area large-diameter through roadway Kong Zhongkong well cementation method |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |