CN214944244U - Well cementation device suitable for mining overburden separation layer grouting engineering - Google Patents
Well cementation device suitable for mining overburden separation layer grouting engineering Download PDFInfo
- Publication number
- CN214944244U CN214944244U CN202120567452.3U CN202120567452U CN214944244U CN 214944244 U CN214944244 U CN 214944244U CN 202120567452 U CN202120567452 U CN 202120567452U CN 214944244 U CN214944244 U CN 214944244U
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- Prior art keywords
- pipe
- well
- well cementation
- device suitable
- grouting
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- Expired - Fee Related
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- 238000000926 separation method Methods 0.000 title claims abstract description 14
- 238000005065 mining Methods 0.000 title claims description 14
- 238000007569 slipcasting Methods 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 5
- 239000010410 layer Substances 0.000 abstract description 15
- 238000005553 drilling Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000002344 surface layer Substances 0.000 abstract description 2
- 238000012795 verification Methods 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model relates to a sealing technique of abandonment drilling, in particular to well cementation device suitable for adopt overburden separation layer slip casting engineering. The utility model discloses a well cementation device suitable for adopt overburden absciss layer slip casting engineering includes the well cementation pipe, well cementation pipe one end is uncovered, and one side is equipped with the slip casting pipe of its inner chamber of intercommunication, the slip casting pipe end connection has high-pressure quick-operation joint. The advantages are that: structural design is simple, reasonable, space between shutoff abandonment drilling surface layer sleeve pipe that can make things convenient for quick and the production sleeve pipe to can be fast stronger in high-pressure line connection maneuverability, the device preparation technology is simple and convenient, easily masters, in construction practice, has also obtained better verification, facilitate promotion.
Description
Technical Field
The utility model relates to a sealing technique of abandonment drilling, in particular to well cementation device suitable for adopt overburden separation layer slip casting engineering.
Background
The principle of the mining overburden bed separation grouting filling technology is as follows: the method comprises the steps of enabling the primary mining period of a main key layer or a target key layer to be stable through reasonable working face mining width design, reasonably reserving section isolation coal pillars with certain width, controlling communication movement of overlying rocks of two adjacent working faces to be in an insufficient mining state, grouting and filling a mining overlying strata separation layer region through ground drilling, forming a grouting, filling and compacting bearing region with certain width in the middle range of a goaf, keeping mining stability of the main key layer or the target key layer, forming a rock covering key layer structure-filling region compacting bearing layer-section isolation coal pillar composite supporting bearing structure to control the earth surface, and accordingly achieving effective control of mining earth surface settlement. During grouting construction, the phenomenon of slurry return to the ground, commonly called 'slurry leakage', often occurs because of the untight sealing of the abandoned drill holes, and environmental pollution is caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a well cementation device suitable for adopt overburden separation layer slip casting engineering is provided, the effectual defect of overcoming prior art.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
the utility model provides a well cementation device suitable for adopt and cover rock absciss layer slip casting engineering, includes the well cementation pipe, well cementation pipe one end is uncovered, and one side is equipped with the slip casting pipe of its inner chamber of intercommunication, slip casting pipe end connection has high-pressure quick-operation joint.
The beneficial effects are that: structural design is simple, reasonable, space between shutoff abandonment drilling surface layer sleeve pipe that can make things convenient for quick and the production sleeve pipe to can be fast in high-pressure line connection maneuverability stronger, the device preparation technology is simple and convenient, easily masters, in construction practice, has also obtained better verification, the facilitate promotion
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, the periphery of one end of the well cementation pipe is provided with threads.
The beneficial effect of adopting the further technical scheme is that: when the screw thread of the surface casing is well preserved, the fast grouting is realized through the threaded connection of the solid well pipe and the surface casing.
Further, one end of the well cementation pipe is provided with a welding groove inclining towards the inner side.
The beneficial effect of adopting the further technical scheme is that: when the surface casing screw thread is damaged, the solid well pipe and the surface casing pipe orifice are welded with each other, so that the solid well pipe and the surface casing pipe orifice are well connected, and stable grouting is finally realized.
Further, a pressure gauge is communicated with the grouting pipe.
The beneficial effect of adopting the further technical scheme is that: grouting pressure is strictly controlled in the grouting process, and grouting operation is prevented from being influenced by small pressure or overlarge pressure.
Drawings
FIG. 1 is a schematic structural view of a well cementing device suitable for a overburden mining and separation layer grouting project of the present invention;
fig. 2 is the utility model discloses a well cementation device when abandonment well head cementing suitable for adopt overburden rock separation layer slip casting engineering.
In the drawings, the components represented by the respective reference numerals are listed below:
1. cementing a well pipe; 2. a high pressure quick connector; 3. a pressure gauge; 11. and (4) grouting pipes.
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.
Example (b): as shown in fig. 1 and 2, the well cementation device suitable for the mining overburden separation layer grouting engineering of the embodiment comprises a solid well pipe 1, one end of the solid well pipe 1 is open, a grouting pipe 11 communicated with the inner cavity of the solid well pipe is arranged on one side of the solid well pipe, and the end of the grouting pipe 11 is connected with a high-pressure quick connector 2.
The well cementation process is as follows:
aligning the pipe orifice (open end) of the solid well pipe 1 with the orifice of the surface casing pipe of the abandoned borehole, connecting and fixing the solid well pipe and the surface casing pipe in a sealing way, and then inputting cement into the stratum between the surface casing pipe and the production casing pipe and outside the production casing pipe through the high-pressure quick connector 2 by a grouting pump. Thereby eliminating "grout" during construction.
Specifically, the abandoned borehole surface casing (denoted by a in the figure) is phi 245mm, and the production casing (denoted by c in the figure) is phi 178 mm. A well fixing pipe 1 with the diameter of 245mm is used, a grouting opening is formed in the right lower end of a pipe body, a grouting pipe 11 is welded, a high-pressure quick connector 2 with the diameter of 2 inches is welded with the opening of the grouting pipe 11, thick cement slurry is input into the device through a slurry pump, and therefore the effect of preventing slurry leakage is achieved by blocking a gap between a drilling surface casing and a production casing.
Generally, the cementing pipe 1 is connected with the surface casing in two ways:
1) the surface casing of abandonment drilling (b indicates drilling in the figure) is more recent, and inside screw thread preserves well, selects solid well pipe 1 of adaptation size, processes the external screw thread outside the mouth of pipe, embolias surface casing pipe mouth through threaded connection's form, realizes the connection of solid well pipe 1 and surface casing.
2) The surface casing of abandonment drilling is more recent, and inside screw thread has damaged, selects the well cementation pipe 1 of adaptation size, processes the welding groove of 30 degrees in mouth of pipe department, through this welding groove and the gate welding seal of surface casing, realizes being connected of solid well pipe 1 and surface casing.
Optimally, a pressure gauge 3 is communicated with the grouting pipe 11, the general rated pressure of the pressure gauge 3 is set to be 8MPa, the pressure of the grouting cement slurry is strictly controlled during grouting, so that the grouting is effective, the poor grouting sealing effect caused by too low pressure is avoided, and the 'slurry overflow' at other gaps or drill holes caused by too high pressure is avoided.
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 (4)
1. The utility model provides a well cementation device suitable for adopt overburden separation layer slip casting engineering which characterized in that: the well fixing pipe comprises a well fixing pipe (1), wherein one end of the well fixing pipe (1) is open, one side of the well fixing pipe is provided with a grouting pipe (11) communicated with an inner cavity of the well fixing pipe, and the end part of the grouting pipe (11) is connected with a high-pressure quick connector (2).
2. The well cementation device suitable for the mining overburden separation layer grouting engineering according to claim 1, characterized in that: and the periphery of one end of the solid well pipe (1) is provided with threads.
3. The well cementation device suitable for the mining overburden separation layer grouting engineering according to claim 1, characterized in that: one end of the solid well pipe (1) is provided with a welding groove inclining towards the inner side.
4. A cementing device suitable for mining overburden separation grouting engineering according to any one of claims 1 to 3, which is characterized in that: and the grouting pipe (11) is communicated with a pressure gauge (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120567452.3U CN214944244U (en) | 2021-03-19 | 2021-03-19 | Well cementation device suitable for mining overburden separation layer grouting engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120567452.3U CN214944244U (en) | 2021-03-19 | 2021-03-19 | Well cementation device suitable for mining overburden separation layer grouting engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214944244U true CN214944244U (en) | 2021-11-30 |
Family
ID=79041446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120567452.3U Expired - Fee Related CN214944244U (en) | 2021-03-19 | 2021-03-19 | Well cementation device suitable for mining overburden separation layer grouting engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214944244U (en) |
-
2021
- 2021-03-19 CN CN202120567452.3U patent/CN214944244U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |