CN115492550B - Grouting hole sealing device for underground hydraulic fracturing drilling - Google Patents
Grouting hole sealing device for underground hydraulic fracturing drilling Download PDFInfo
- Publication number
- CN115492550B CN115492550B CN202211138017.4A CN202211138017A CN115492550B CN 115492550 B CN115492550 B CN 115492550B CN 202211138017 A CN202211138017 A CN 202211138017A CN 115492550 B CN115492550 B CN 115492550B
- Authority
- CN
- China
- Prior art keywords
- pipe
- grouting
- wall
- fixed
- fixed pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005553 drilling Methods 0.000 title claims abstract description 20
- 238000007789 sealing Methods 0.000 title claims abstract description 18
- 238000005192 partition Methods 0.000 claims abstract description 35
- 239000002002 slurry Substances 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims description 10
- 239000004570 mortar (masonry) Substances 0.000 abstract description 9
- 230000035699 permeability Effects 0.000 abstract description 2
- 239000011440 grout Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a grouting hole sealing device for underground hydraulic fracturing drilling holes, which comprises a fixed pipe, wherein a plurality of arc-shaped partition plates are arranged on the outer wall of the fixed pipe, outer slurry outlets are respectively formed on the outer wall of the fixed pipe between two adjacent partition plates, a rotating pipe is rotatably arranged in the fixed pipe, a plurality of petal-shaped support plates are arranged on the upper end face and the lower end face of the fixed pipe, two adjacent support plates at the same end are attached in an up-down overlapping mode, and the upper face and the lower face of each partition plate are attached to the support plates. Compared with the prior art, the invention can enclose the inside of the drilling holes with different sizes into a plurality of mutually closed spaces, and perform partitioned grouting in the drilling holes so as to improve the permeability of mortar.
Description
Technical Field
The invention relates to the technical field of gas drilling hole sealing, in particular to a grouting hole sealing device for underground hydraulic fracturing drilling holes.
Background
The hydraulic fracturing technology is utilized in the mine, so that the gas extraction efficiency of the coal seam can be improved, the drilling holes are required to be sealed before hydraulic fracturing, the cement mortar is used for sealing holes in the prior art, but cracks exist around the drilling holes, the mortar pump pressure is limited in the drilling holes with larger diameters, and the mortar cannot penetrate into the cracks well to form sealing within a certain range, so that the sealing effect is poor.
Therefore, it is necessary to provide a grouting and hole sealing device for hydraulic fracturing and drilling in the pit, so as to solve the problems in the background art.
Disclosure of Invention
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a slip casting hole sealing device of hydraulic fracturing drilling in pit, includes the fixed pipe, the fixed pipe outer wall is equipped with multi-disc curved division board, and adjacent two the outer thick liquid hole has respectively been seted up to the fixed pipe outer wall between the division board, rotationally be equipped with the rotation pipe in the fixed pipe, the terminal surface all is equipped with the backup pad of multi-disc petal shape about the fixed pipe, laminating from top to bottom overlaps with two backup pads that same end is adjacent, just the upper and lower face of division board all laminates with the backup pad.
Further, preferably, a guide bar is fixed in the support plate, and the guide bar is rotatably connected to the fixed tube by a rotation pin.
Further, preferably, each of the rotation pins is sleeved with a support plate gear fixed to the corresponding guide bar, the support plate gear penetrates through the inner wall of the fixed tube, the outer wall of the rotation tube is provided with a gear ring, and the gear ring is meshed with the support plate gear.
Further, preferably, two adjacent guide strips are slidably connected together by a connecting strip.
Further, preferably, one side edge of the partition plate is rotatably connected to a side wall of the fixed pipe, a partition plate gear is fixed in a rotating shaft of the fixed pipe, the partition plate gear penetrates to an inner wall of the fixed pipe, and the gear ring is meshed with the partition plate gear.
Further, preferably, the rotary pipe is provided with mesh holes which are formed at positions corresponding to the outer pulp outlet holes and can be penetrated through any one of the outer pulp outlet holes.
Further, preferably, a grouting pipe is disposed in the rotating pipe in a pluggable manner, an inner grouting hole is formed in a side wall below the grouting pipe, and the upper portion of the grouting pipe can extend to the ground.
Further, preferably, the inner wall of the rotating pipe is provided with an inclined ratchet groove, the outer wall of the grouting pipe is rotatably provided with a barrier strip, and torque for enabling the barrier strip to be far away from the outer wall of the grouting pipe is provided in the barrier strip through a torsion spring.
Compared with the prior art, the invention has the beneficial effects that:
in the invention, when the radius of a supporting surface formed by the supporting plate changes during the rotation of the rotating tube, the partition plates synchronously rotate and open and close, and the opening radius of the partition plates and the opening radius of the supporting plate are always kept the same, that is, when the supporting plate is attached to the drilled holes with different sizes, the partition plates are also attached to the drilled holes synchronously, so that the supporting plate at the upper end and the lower end of the fixed tube and two adjacent partition plates can jointly enclose the drilled holes with different sizes into a plurality of mutually closed spaces.
According to the invention, the inner grouting holes are sequentially aligned with one of the outer grouting holes when the grouting pipe is rotated, so that the mortar in the grouting pipe can be injected from the corresponding space, and the inside of the drilling hole is subjected to partitioned grouting, so that higher pressure can be provided for stratum cracks in the drilling hole under the condition of limited grouting pressure, and the permeability of the mortar is improved.
Drawings
FIG. 1 is a schematic structural diagram of a grouting and hole sealing device for downhole hydraulic fracturing drilling;
fig. 2 is a schematic structural view of a support plate;
FIG. 3 is a schematic view of the structure of the partition plate;
in the figure: 1. a fixed tube; 2. a partition plate; 21. a partition plate gear; 3. an outer slurry outlet hole; 4. a rotary tube; 41. a gear ring; 42. a mesh; 43. a ratchet groove; 5. a support plate; 51. a guide bar; 52. a rotation pin; 53. a support plate gear; 54. a connecting strip; 6. grouting pipe; 61. an inner slurry outlet hole; 62. and a barrier strip.
Detailed Description
Referring to fig. 1, in the embodiment of the invention, a grouting hole sealing device for downhole hydraulic fracturing drilling comprises a fixed pipe 1, wherein a plurality of arc-shaped partition plates 2 are arranged on the outer wall of the fixed pipe 1, outer slurry outlet holes 3 are respectively formed on the outer wall of the fixed pipe 1 between two adjacent partition plates 2, a rotating pipe 4 is rotatably arranged in the fixed pipe 1, a plurality of petal-shaped support plates 5 are arranged on the upper end face and the lower end face of the fixed pipe 1, two adjacent support plates 5 at the same end are overlapped up and down and are attached, and the upper surface and the lower surface of the partition plate 2 are attached to the support plates 5. That is, the support plates 5 at the upper and lower ends of the fixed tube 1 and the adjacent two partition plates 2 can collectively enclose the inside of the bore into a plurality of spaces that are closed to each other.
Referring to fig. 2, in the present embodiment, a guide bar 51 is fixed in the support plate 5, and the guide bar 51 is rotatably connected to the fixing tube 1 by a rotation pin 52. The radius of the support surface formed by the support plate 5 can be changed by rotating the support plate 5 to seal different sized bores.
In this embodiment, each of the rotation pins 52 is sleeved with a support plate gear 53 fixed to the corresponding guide bar 51, the support plate gear 53 penetrates through the inner wall of the fixed tube 1, the outer wall of the rotation tube 4 is provided with a gear ring 41, and the gear ring 41 is meshed with the support plate gear 53. Each support plate 5 can be rotated synchronously by rotating the rotation tube 4.
In this embodiment, two adjacent guide strips 51 are slidably connected together by a connecting strip 54. To increase the interaction force and the degree of fit between the two support plates 5.
In this embodiment, one side of the partition plate 2 is rotatably connected to the side wall of the fixed tube 1, a partition plate gear 21 is fixed in the rotating shaft of the fixed tube 1, the partition plate gear 21 penetrates to the inner wall of the fixed tube 1, and the gear ring 41 is meshed with the partition plate gear 21. When the radius of the supporting surface formed by the supporting plate 5 changes when the rotating pipe 4 rotates, the partition plates 2 synchronously rotate to open and close, and the opening radius of the partition plates 2 and the opening radius of the supporting plate 5 are always kept the same, that is, when the supporting plate 5 is attached to the drilled holes with different sizes, the partition plates 2 are also attached to the drilled holes synchronously, so that the supporting plate 5 at the upper end and the lower end of the fixed pipe 1 and two adjacent partition plates 2 can jointly enclose the drilled holes with different sizes into a plurality of mutually closed spaces.
In this embodiment, the rotary pipe 4 is provided with a mesh 42 which is provided at a position corresponding to the outer pulp outlet 3 and can be penetrated through any one of the outer pulp outlet 3.
In this embodiment, the grouting pipe 6 is disposed in the rotating pipe 4 in a pluggable manner, the inner grouting hole 61 is formed in the sidewall below the grouting pipe 6, and the upper portion of the grouting pipe 6 can extend to the ground. That is, by sequentially aligning the inner grout outlet holes 61 with one of the outer grout outlet holes 3 when the grout pipe 6 is rotated, the mortar in the grout pipe 6 can be injected from the corresponding space to perform zonal grouting in the borehole, so that higher pressure can be provided for formation cracks in the borehole under the condition of limited grouting pressure, and the penetration capacity of the mortar can be improved.
In this embodiment, an inclined ratchet groove 43 is formed on the inner wall of the rotating tube 4, a barrier strip 62 is rotatably disposed on the outer wall of the grouting tube 6, and torque for keeping the barrier strip 62 away from the outer wall of the grouting tube 6 is provided by a torsion spring in the barrier strip 62. That is, when the grouting pipe 6 rotates along the inclined direction of the ratchet groove 43, the grouting pipe 6 and the rotating pipe 4 can rotate with each other, and when the grouting pipe 6 rotates against the inclined direction of the ratchet groove 43, the stop bar 62 is clamped into the ratchet groove 43 so that the torque of the grouting pipe 6 can be transmitted into the rotating pipe 4 to drive the rotating pipe 4 to rotate.
In specific implementation, the grouting pipe 6 is inserted into the rotating pipe 4, the fixed pipe 1 and the rotating pipe 4 are jointly hung into the drill hole to a preset depth, the grouting pipe 6 rotates against the inclined direction of the ratchet groove 43, the partition plate 2 and the support plate 5 are opened into the embedded drill hole, mortar is injected into the grouting pipe 6, when the inner grouting hole 61 is aligned with one of the outer grouting holes 3, the mortar in the grouting pipe 6 can be injected from the corresponding space and permeated into a stratum fracture, the grouting pipe 6 is rotated along the inclined direction of the ratchet groove 43, the inner grouting holes 61 are aligned with each outer grouting hole 3 in sequence, so that partition grouting is performed in the drill hole, and after grouting sealing is completed, the grouting pipe 6 is extracted and hydraulic fracturing pipes are inserted into the rotating pipe 4 to fracture the stratum.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The grouting hole sealing device for the underground hydraulic fracturing drilling comprises a fixed pipe (1), and is characterized in that a plurality of arc-shaped partition plates (2) are arranged on the outer wall of the fixed pipe (1), outer slurry outlet holes (3) are respectively formed in the outer wall of the fixed pipe (1) between two adjacent partition plates (2), a rotating pipe (4) is rotatably arranged in the fixed pipe (1), a plurality of petal-shaped support plates (5) are arranged on the upper end face and the lower end face of the fixed pipe (1), two adjacent support plates (5) at the same end are attached in an up-down overlapping mode, and the upper surface and the lower surface of each partition plate (2) are attached to the support plates (5);
a guide strip (51) is fixed in the supporting plate (5), and the guide strip (51) is rotatably connected into the fixed tube (1) through a rotating pin (52);
each rotating pin (52) is sleeved with a supporting plate gear (53) fixed in the corresponding guide bar (51), the supporting plate gear (53) penetrates through the inner wall of the fixed tube (1), the outer wall of the rotating tube (4) is provided with a gear ring (41), and the gear ring (41) is meshed with the supporting plate gear (53);
one side of the partition plate (2) is rotatably connected to the side wall of the fixed pipe (1), a partition plate gear (21) is fixed in the rotating shaft of the fixed pipe (1), the partition plate gear (21) penetrates through the inner wall of the fixed pipe (1), and the gear ring (41) is meshed with the partition plate gear (21).
2. A grouting and sealing device for a downhole hydraulic fracturing borehole according to claim 1, wherein two adjacent guide strips (51) are slidably connected together by a connecting strip (54).
3. The grouting hole sealing device for the downhole hydraulic fracturing drilling according to claim 1, wherein the rotary pipe (4) is provided with meshes (42) which can be communicated with any one of the outer slurry outlet holes (3) at positions corresponding to the outer slurry outlet holes (3).
4. The grouting hole sealing device for underground hydraulic fracturing drilling according to claim 1, wherein a grouting pipe (6) is arranged in the rotating pipe (4) in a pluggable manner, an inner grouting hole (61) is formed in the side wall below the grouting pipe (6), and the upper part of the grouting pipe (6) can extend to the ground.
5. The grouting hole sealing device for the downhole hydraulic fracturing drilling according to claim 4, wherein an inclined ratchet groove (43) is formed in the inner wall of the rotating pipe (4), a barrier strip (62) is rotatably arranged on the outer wall of the grouting pipe (6), and torque for enabling the barrier strip (62) to be far away from the outer wall of the grouting pipe (6) is provided in the barrier strip (62) through a torsion spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211138017.4A CN115492550B (en) | 2022-09-19 | 2022-09-19 | Grouting hole sealing device for underground hydraulic fracturing drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211138017.4A CN115492550B (en) | 2022-09-19 | 2022-09-19 | Grouting hole sealing device for underground hydraulic fracturing drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115492550A CN115492550A (en) | 2022-12-20 |
| CN115492550B true CN115492550B (en) | 2023-09-19 |
Family
ID=84470044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211138017.4A Active CN115492550B (en) | 2022-09-19 | 2022-09-19 | Grouting hole sealing device for underground hydraulic fracturing drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115492550B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103764940A (en) * | 2011-07-05 | 2014-04-30 | 布鲁斯·A·通格特 | Cable compatible rig-less operable annuli engagable system for using and abandoning a subterranean well |
| CN110630220A (en) * | 2019-09-23 | 2019-12-31 | 中国地质大学（武汉） | Vertical geological drilling hole wall tamping device and tamping method |
| CN112081109A (en) * | 2020-09-07 | 2020-12-15 | 江苏省建筑工程集团有限公司 | Grouting pipe embedding device |
| CN112709533A (en) * | 2021-01-08 | 2021-04-27 | 河南理工大学 | Coal seam hydraulic pressure relief hole protecting drill |
| CN113006865A (en) * | 2021-04-21 | 2021-06-22 | 徐州中国矿大岩土工程新技术发展有限公司 | Coal mine goaf administers and backfill slurrying slip casting device that sinks |
| CN214498999U (en) * | 2021-04-19 | 2021-10-26 | 中国煤炭地质总局第三水文地质队 | Be used for slip casting construction drill way sealing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11280149B2 (en) * | 2019-03-07 | 2022-03-22 | Cactus Wellhead, LLC | Adapter for wellhead pressure control equipment |
-
2022
- 2022-09-19 CN CN202211138017.4A patent/CN115492550B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103764940A (en) * | 2011-07-05 | 2014-04-30 | 布鲁斯·A·通格特 | Cable compatible rig-less operable annuli engagable system for using and abandoning a subterranean well |
| CN110630220A (en) * | 2019-09-23 | 2019-12-31 | 中国地质大学（武汉） | Vertical geological drilling hole wall tamping device and tamping method |
| CN112081109A (en) * | 2020-09-07 | 2020-12-15 | 江苏省建筑工程集团有限公司 | Grouting pipe embedding device |
| CN112709533A (en) * | 2021-01-08 | 2021-04-27 | 河南理工大学 | Coal seam hydraulic pressure relief hole protecting drill |
| CN214498999U (en) * | 2021-04-19 | 2021-10-26 | 中国煤炭地质总局第三水文地质队 | Be used for slip casting construction drill way sealing device |
| CN113006865A (en) * | 2021-04-21 | 2021-06-22 | 徐州中国矿大岩土工程新技术发展有限公司 | Coal mine goaf administers and backfill slurrying slip casting device that sinks |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115492550A (en) | 2022-12-20 |
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