CN112049568A - Well drilling method - Google Patents
Well drilling method Download PDFInfo
- Publication number
- CN112049568A CN112049568A CN202010720211.8A CN202010720211A CN112049568A CN 112049568 A CN112049568 A CN 112049568A CN 202010720211 A CN202010720211 A CN 202010720211A CN 112049568 A CN112049568 A CN 112049568A
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- CN
- China
- Prior art keywords
- cutter bar
- cast iron
- drill rod
- outer sleeve
- bar seat
- 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 24
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910001018 Cast iron Inorganic materials 0.000 claims abstract description 59
- 230000000149 penetrating effect Effects 0.000 claims abstract description 16
- 230000001681 protective effect Effects 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 12
- 230000006698 induction Effects 0.000 claims abstract description 5
- 239000002689 soil Substances 0.000 claims description 12
- 230000001939 inductive effect Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 12
- 239000010410 layer Substances 0.000 description 8
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000002344 surface layer Substances 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
-
- 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
- E21B10/00—Drill bits
- E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/06—Lining shafts; Linings therefor with iron or steel
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/12—Accessories for making shaft linings, e.g. suspended cradles, shutterings
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)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a well drilling method which is carried out by a well drilling mechanism according to the following steps, wherein the well drilling mechanism comprises an annular cutter bar seat, a cast iron outer sleeve sleeved at the tail end of the annular cutter bar seat and a drill rod of a pipe body structure connected with the tail end of the cutter bar seat and penetrating through the cast iron outer sleeve, a protective ring is arranged on the outer peripheral surface of the tail end of the annular cutter bar seat, an end ring is arranged at the front end of the cast iron outer sleeve, the inner peripheral surface of the end ring is completely positioned on the protective ring along the axial projection of the drill rod, an induction switch matched with the protective ring and connected with a warning lamp positioned at the rear end of the cast iron outer sleeve in series through a lead is arranged at the inner end of the end ring, and a plurality of cutter bars which can be folded together and penetrate through the. The invention provides a well drilling method with good safety during construction, and solves the problem of poor safety in the construction process of the conventional vertical well.
Description
The application is a divisional application of application No. 2019102737354, 2019, 04.07.3 entitled "a well construction method".
Technical Field
The invention relates to the technical field of capital construction, in particular to a well drilling method.
Background
In daily production and life, the construction of forming a vertical shaft on the earth is often carried out, and the existing mode of forming the vertical shaft on the earth is to dig a vertical shaft blank on the earth and then lay a hole wall in the vertical shaft blank to prevent the earth from collapsing so as to form the vertical shaft. The existing construction mode has the following defects: in the process of construction in the shaft blank, the safety accident that the soil falls down to damage the human body and articles is easily generated, namely the safety during the construction is poor.
Disclosure of Invention
The invention provides a well drilling method with good safety during construction, and solves the problem of poor safety in the construction process of the conventional vertical well.
The technical problem is solved by the following technical scheme: a well drilling method is characterized in that the well drilling mechanism comprises an annular cutter bar seat, a cast iron outer sleeve sleeved at the tail end of the annular cutter bar seat and a drill rod of a pipe body structure connected with the tail end of the cutter bar seat and penetrating through the cast iron outer sleeve, wherein a protective ring is arranged on the outer peripheral surface of the tail end of the annular cutter bar seat, an end ring is arranged at the front end of the cast iron outer sleeve, the inner peripheral surface of the end ring is completely positioned on the protective ring along the axial projection of the drill rod, an induction switch matched with the protective ring and connected with a warning lamp positioned at the rear end of the cast iron outer sleeve in series through a lead is arranged at the inner end of the end ring, and a plurality of cutter bars which can be folded together and penetrate through the end ring are arranged on the front end surface of the annular cutter bar seat; firstly, connecting a warning lamp with a power supply, wherein the warning lamp and an inductive switch are connected in series on the power supply, so that a cutter bar is separated, and a drill rod is in a vertical direction; secondly, rotating the drill rod, driving the annular cutter bar seat by the drill rod to drive the cutter bar to rotate by taking the drill rod as a shaft, forming an annular groove around the outside of the annular cutter bar seat by the rotation of the cutter bar in soil, and forming a mud column penetrating through the cutter bar seat and the drill rod by the part of the soil in the annular groove; thirdly, when the depth of the cutter bar seat entering the muddy ground reaches the position where the protective ring is sensed by the sensing switch, the warning lamp is communicated with the power supply to give out light for warning, the cast iron outer sleeve is driven to move towards the annular groove to increase the insertion depth when the warning lamp gives out light, the cast iron outer sleeve is kept disconnected with the cutter bar, the insertion speed of the cast iron outer sleeve is greater than the speed of the drill rod entering the annular groove, and the depth of the annular groove reaches the designed depth after the second step and the third step are repeated; fourthly, after the cutter bar is folded, the drill rod is retracted, so that the cutter bar seat and the drill rod are withdrawn from the cast iron jacket, the cast iron jacket is remained in the annular groove, and the cast iron jacket is moved downwards to be supported on the bottom of the annular groove; and fifthly, taking out the mud column to enable the annular groove to become a vertical shaft, wherein the cast iron outer sleeve forms a well wall of the vertical shaft. The invention can synchronously insert the cast iron outer sleeve into the hole wall of the formed hole in the well digging process, thereby preventing collapse in the hole and protecting the drill rod, and further improving the safety in construction. Whether the cast iron jacket needs to be pushed or not in the well drilling process can be conveniently known. The cast iron outer sleeve is not driven by the tool post or the drill rod, so that the damage to the drill rod of the tool post can be prevented, and the same power can drive the larger drill rod. Detect through inductive switch, know promptly before protective ring and end ring do not have the contact and need impel the cast iron overcoat, better to the protective effect of equipment. Set up end ring cooperation lag and the inner peripheral surface of end ring and all be located the guard ring along the axial projection of drilling rod, can prevent to beat well in-process stone and get into to produce the phenomenon production that damages the drilling rod even block between cast iron overcoat and the drilling rod.
Preferably, the fourth step is divided into the following steps: 4-1, filling the mixture of sand and cement into the die cavity through the feed inlet; 4-2, withdrawing the drill rod after the cutter bar is folded, so that the cutter bar seat and the drill rod are withdrawn from the cast iron jacket; 4-3, injecting water into a space between the inner sleeve and the mud column, wherein the water in the space permeates into the mold cavity through the permeation holes so that the cement-sand mixture in the mold cavity forms a concrete layer covering the inner peripheral surface of the cast iron outer sleeve; the fifth step comprises the following steps: 5-1, constructing and digging out soil forming the upper end of the mud column in a human-ground mode; and 5-2, dissolving the soil at the lower end of the mud column into the water in the inner sleeve to form mud, and then pumping out the mud to realize the taking out of the mud column. The inner sleeve forms a template of the mold cavity and can be used as a decorative surface layer in the shaft. Can conveniently form the concrete layer that carries out the protection to the cast iron overcoat, can not get into the well by the people when taking out the mud post, the security is good.
Preferably, the lead is located in the concrete layer, the inductive switch is located outside the mold cavity, the guide comprises a first lead and a second lead, the second lead is electrically connected with a plurality of second branches penetrating into the inner sleeve, and the first lead is electrically connected with a plurality of first branches penetrating into the inner sleeve. The header completes the wiring within the shaft. So that the subsequent installation of lamps in the shaft is convenient for electricity connection. When the induction switch is connected electrically, one second branch line and one first branch line are electrically connected to form a loop, and the induction switch can be used as a main switch for controlling all the electricity.
Preferably, the outer circumferential surface of one end of the inner sleeve facing the end ring is provided with a connecting ring, the inner end surface of the end ring is provided with a plurality of thread heads which penetrate through connecting holes in the connecting ring and are connected with nuts, and the nuts are matched with the end ring to clamp the connecting ring so as to fix the inner pipe and the cast iron outer pipe together. The annular cutter bar seat can be positioned at the position where the protection ring is away from one side of the drill rod, and the well drilling depth is fixed, so that the times of pushing the cast iron outer sleeve are reduced.
Preferably, the thread head is provided with a pointed end. The convenience is good when connecting the inner sleeve and the cast iron outer sleeve.
Preferably, a plurality of tool-bar mounting openings distributed along the circumferential direction of the annular tool-bar seat are formed in the front end face of the annular tool-bar seat, the tool bars are hinged in the tool-bar mounting openings, and limiting portions capable of maintaining the tool bars in a separated state when the tool bars are rotated towards the direction far away from the axis of the drill rod are arranged on the bottom wall of the tool-bar mounting openings. When the knife strips are folded, the knife strips rotate towards the position of the axis of the annular knife strip seat, namely the inner part of the annular knife strip seat rotates.
The invention has the following advantages: the inner wall of the hole can be synchronously formed in the well drilling process, so that the safety of subsequent operation in the hole is reduced; the earth can be removed into the well.
Drawings
FIG. 1 is a schematic view of the invention at the beginning of a well
Fig. 2 is a schematic diagram of a well drilling mechanism in the present invention.
FIG. 3 is a schematic diagram of the present invention after a well is drilled until the guard ring is detected by the inductive switch.
FIG. 4 is a schematic view of the present invention just after it has been constructed to the depth of the annular groove as designed.
Fig. 5 is a schematic view of the present invention as it is being constructed to form a concrete layer.
Fig. 6 is a schematic view of a shaft constructed by the present invention.
In the figure: the device comprises an annular cutter bar seat 1, a cast iron outer sleeve 2, a drill rod 3, a protective ring 4, an end ring 5, a warning lamp 6, an inductive switch 7, a cutter bar mounting opening 8, a shaft head 9, a cutter bar 10, a limiting part 11, an inner sleeve 12, a mold cavity 13, a feed inlet 14, a penetration hole 15, a first lead 16, a second lead 17, a second branch 18, a first branch 19, a connecting ring 20, a nut 21, a threaded head 22, a pointed end 23, a soil ground 24, an annular groove 25, a mud column 26, a concrete layer 28 and a vertical shaft 30.
Detailed Description
The invention is further described with reference to the following figures and examples.
Referring to fig. 1, 2, 3, 4, 5 and 6, a well drilling method is carried out by a well drilling mechanism according to the following steps, wherein the well drilling mechanism comprises an annular cutter bar seat 1, a cast iron outer sleeve 2 sleeved at the tail end of the annular cutter bar seat and a drill rod 3 which is arranged in the cast iron outer sleeve in a penetrating manner and is connected with the tail end of the cutter bar seat together in a pipe body structure. The outer peripheral surface of the tail end of the annular blade holder is provided with a protective ring 4. The front end of the cast iron outer sleeve is provided with an end ring 5. The inner circumferential surface of the end ring is located on the guard ring in the axial projection of the drill rod. The inner end of the end ring is provided with an inductive switch 7 which is connected with a warning lamp 6 positioned at the rear end of the cast iron outer sleeve in series through a lead and is matched with the protective ring. The front end face of the annular tool-bar seat is provided with a plurality of tool-bar mounting openings 8 distributed along the circumferential direction of the annular tool-bar seat. And a blade strip 10 is hinged in each blade strip mounting opening through a shaft head 9. The bottom wall of the blade mounting opening is provided with a limiting part 11 which can maintain the blade in a separated state when the blade is rotated in a direction away from the axis of the drill rod. An inner sleeve 12 is also arranged in the cast iron outer sleeve in a penetrating way. And a die cavity 13 is formed among the inner sleeve, the end ring and the cast iron outer sleeve. The die cavity is open at the end away from the blade holder to form a feed opening 14. The side plate of the inner sleeve is provided with a plurality of permeation holes 15 which penetrate through the die cavity. The conductors are located in the concrete layer and the inductive switch is located outside the mould cavity, the guide comprising a first conductor 16 and a second conductor 17. The second wire is electrically connected with a plurality of second branch lines 18 penetrating into the inner sleeve. The first conducting wire is electrically connected with a plurality of first branch wires 19 penetrating into the inner sleeve. The outer peripheral surface of one end of the inner sleeve facing the end ring is provided with a connecting ring 20. The inner end surface of the end ring is provided with a plurality of thread heads 22 which penetrate through the connecting holes on the connecting ring and are connected with the nut 21. The nut mating end ring clamps the connecting ring to fix the inner pipe and the cast iron outer pipe together. The threaded head is provided with a pointed end 23. The construction process of the invention is as follows:
firstly, a warning lamp is connected with a power supply, the warning lamp and an inductive switch are connected on the power supply 29 in series, so that a cutter bar is separated, and a drill rod is in a vertical direction; secondly, the drill rod is rotated, the drill rod drives the annular cutter bar seat to drive the cutter bar to rotate by taking the drill rod as a shaft, the cutter bar rotates on earth 24 to form an annular groove 25 surrounding the outer part of the annular cutter bar seat, and the part of the earth in the annular groove forms a mud column 26 penetrating through the cutter bar seat and the drill rod; thirdly, when the depth of the cutter bar seat entering the muddy ground reaches the depth of the protection ring sensed by the sensing switch, the warning lamp is communicated with the power supply to give out light for warning, the cast iron outer sleeve is driven to move towards the annular groove to increase the insertion depth when the warning lamp gives out light, the cast iron outer sleeve is kept disconnected with the cutter bar, the insertion speed of the cast iron outer sleeve is greater than the speed of the drill rod entering the annular groove to prevent the protection ring from extruding the end ring, and the depth of the annular groove reaches the design depth in the second step and the third step; fourthly, after the cutter bar is folded, the drill rod is retracted, so that the cutter bar seat and the drill rod are withdrawn from the cast iron jacket, the cast iron jacket is remained in the annular groove, and the cast iron jacket is moved downwards to be supported on the bottom of the annular groove; and fifthly, taking out the mud column to enable the annular groove to become a vertical shaft 30, wherein the cast iron outer sleeve forms the wall of the vertical shaft.
The fourth step comprises the following steps: 4-1, filling the mixture of sand and cement into the die cavity through the feed inlet; 4-2, withdrawing the drill rod after the cutter bar is folded, so that the cutter bar seat and the drill rod are withdrawn from the cast iron jacket, and moving the cast iron jacket downwards to the groove bottom supported to the annular groove; 4-3, injecting water into a space between the inner sleeve and the mud column, wherein the water in the space permeates into the mold cavity through the permeation holes so that the cement-sand mixture in the mold cavity forms a concrete layer covering the inner peripheral surface of the cast iron outer sleeve; the fifth step comprises the following steps: 5-1, constructing and digging out soil forming the upper end of the mud column in a human-ground mode; and 5-2, dissolving the soil at the lower end of the mud column into the water in the inner sleeve to form mud, and then pumping out the mud to realize the taking out of the mud column. The lead is positioned in the concrete layer.
Claims (3)
1. A well drilling method is characterized in that the well drilling mechanism comprises an annular cutter bar seat, a cast iron outer sleeve sleeved at the tail end of the annular cutter bar seat and a drill rod of a pipe body structure connected with the tail end of the cutter bar seat and penetrating through the cast iron outer sleeve, wherein a protective ring is arranged on the outer peripheral surface of the tail end of the annular cutter bar seat, an end ring is arranged at the front end of the cast iron outer sleeve, the inner peripheral surface of the end ring is completely positioned on the protective ring along the axial projection of the drill rod, an induction switch matched with the protective ring and connected with a warning lamp positioned at the rear end of the cast iron outer sleeve in series through a lead is arranged at the inner end of the end ring, and a plurality of cutter bars which can be folded together and penetrate through the end ring are arranged on the front end surface of the annular cutter bar seat; firstly, connecting a warning lamp with a power supply, wherein the warning lamp and an inductive switch are connected in series on the power supply, so that a cutter bar is separated, and a drill rod is in a vertical direction; secondly, rotating the drill rod, driving the annular cutter bar seat by the drill rod to drive the cutter bar to rotate by taking the drill rod as a shaft, forming an annular groove around the outside of the annular cutter bar seat by the rotation of the cutter bar in soil, and forming a mud column penetrating through the cutter bar seat and the drill rod by the part of the soil in the annular groove; thirdly, when the depth of the cutter bar seat entering the muddy ground reaches the position where the protective ring is sensed by the sensing switch, the warning lamp is communicated with the power supply to give out light for warning, the cast iron outer sleeve is driven to move towards the annular groove to increase the insertion depth when the warning lamp gives out light, the cast iron outer sleeve is kept disconnected with the cutter bar, the insertion speed of the cast iron outer sleeve is higher than the speed of the drill rod entering the annular groove, and the second step and the third step are repeated to enable the depth of the annular groove to reach the designed depth; fourthly, after the cutter bar is folded, the drill rod is retracted, so that the cutter bar seat and the drill rod are withdrawn from the cast iron jacket, the cast iron jacket is remained in the annular groove, and the cast iron jacket is moved downwards to be supported on the bottom of the annular groove; fifthly, taking out the mud column to enable the annular groove to become a vertical shaft, and forming a wall of the vertical shaft by the cast iron outer sleeve; the guide wire is positioned in the concrete layer, the inductive switch is positioned outside the die cavity, the guide comprises a first guide wire and a second guide wire, the second guide wire is electrically connected with a plurality of second branches penetrating into the inner sleeve, and the first guide wire is electrically connected with a plurality of first branches penetrating into the inner sleeve.
2. A well drilling method as claimed in claim 1, wherein an inner sleeve is further arranged in the cast iron outer sleeve in a penetrating manner, a mold cavity is formed among the inner sleeve, the end ring and the cast iron outer sleeve, one end of the mold cavity, far away from the cutter bar seat, is opened to form a feed inlet, a plurality of permeation holes penetrating through the mold cavity are formed in a side plate of the inner sleeve, and the fourth step is divided into the following steps: 4-1, filling the mixture of sand and cement into the die cavity through the feed inlet; 4-2, withdrawing the drill rod after the cutter bar is folded, so that the cutter bar seat and the drill rod are withdrawn from the cast iron jacket; 4-3, injecting water into a space between the inner sleeve and the mud column, wherein the water in the space permeates into the mold cavity through the permeation holes so that the cement-sand mixture in the mold cavity forms a concrete layer covering the inner peripheral surface of the cast iron outer sleeve; the fifth step comprises the following steps: 5-1, constructing and digging out soil forming the upper end of the mud column in a human-ground mode; and 5-2, dissolving the soil at the lower end of the mud column into the water in the inner sleeve to form mud, and then pumping out the mud to realize the taking out of the mud column.
3. A well drilling method according to claim 1, wherein the front end face of the annular blade holder is provided with a plurality of blade mounting openings circumferentially distributed along the annular blade holder, the blades are hinged in the blade mounting openings, and the bottom wall of the blade mounting openings is provided with a limiting part which can keep the blades in a separated state when the blades are rotated in a direction away from the axis of the drill rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010720211.8A CN112049568A (en) | 2019-04-07 | 2019-04-07 | Well drilling method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910273735.4A CN110080677B (en) | 2019-04-07 | 2019-04-07 | Well drilling method |
| CN202010720211.8A CN112049568A (en) | 2019-04-07 | 2019-04-07 | Well drilling method |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910273735.4A Division CN110080677B (en) | 2019-04-07 | 2019-04-07 | Well drilling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112049568A true CN112049568A (en) | 2020-12-08 |
Family
ID=67414288
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010720211.8A Withdrawn CN112049568A (en) | 2019-04-07 | 2019-04-07 | Well drilling method |
| CN202010272224.3A Withdrawn CN111577121A (en) | 2019-04-07 | 2019-04-07 | Well drilling method |
| CN201910273735.4A Active CN110080677B (en) | 2019-04-07 | 2019-04-07 | Well drilling method |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010272224.3A Withdrawn CN111577121A (en) | 2019-04-07 | 2019-04-07 | Well drilling method |
| CN201910273735.4A Active CN110080677B (en) | 2019-04-07 | 2019-04-07 | Well drilling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN112049568A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903345A (en) * | 2021-01-26 | 2021-06-04 | 江西师范大学 | Soil or plant root system sampler and sampling method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226389A (en) * | 2011-03-28 | 2011-10-26 | 河南理工大学 | Coal mine drilling anti-collapse hole pipe network and anti-collapse hole method |
| CN104088589B (en) * | 2014-07-01 | 2016-08-24 | 北京市三一重机有限公司 | Drilling tool and rotary drilling rig |
| KR20160020124A (en) * | 2014-08-13 | 2016-02-23 | 정순용 | Dividable hammer bit |
| CN104453728B (en) * | 2014-11-18 | 2017-03-08 | 费鸿禄 | A kind of anti-collapse aperture apparatus |
| CN105649632A (en) * | 2016-03-30 | 2016-06-08 | 中国铁建重工集团有限公司 | Vertical shaft heading machine and tool bit assembly thereof |
| CN105781429B (en) * | 2016-04-05 | 2018-08-10 | 英联鑫博(天津)机械制造有限公司 | A kind of counter weight device of rotary drilling rig and the rotary drilling rig with it |
| CN205743733U (en) * | 2016-05-03 | 2016-11-30 | 周兆弟 | Drill rod assemblies for the bored enlarged footing of stake machine |
| CN206352481U (en) * | 2016-11-24 | 2017-07-25 | 重庆市基础工程有限公司 | Pipe-following drilling system and the anti-collapse aperture apparatus of steel floral tube |
| CN108457596A (en) * | 2018-04-11 | 2018-08-28 | 煤炭工业合肥设计研究院有限责任公司 | It is a kind of to bore Self-sinking type borehole wall guard system certainly |
| CN108915598B (en) * | 2018-07-20 | 2020-04-24 | 四川锦城智信建设工程有限公司 | Drill bit special for bored concrete pile with machine-drilled end reaming and construction method thereof |
-
2019
- 2019-04-07 CN CN202010720211.8A patent/CN112049568A/en not_active Withdrawn
- 2019-04-07 CN CN202010272224.3A patent/CN111577121A/en not_active Withdrawn
- 2019-04-07 CN CN201910273735.4A patent/CN110080677B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111577121A (en) | 2020-08-25 |
| CN110080677A (en) | 2019-08-02 |
| CN110080677B (en) | 2020-10-30 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201208 |