CN107503680A - A kind of ground major diameter fast pore-creating drilling equipment and its method - Google Patents
A kind of ground major diameter fast pore-creating drilling equipment and its method Download PDFInfo
- Publication number
- CN107503680A CN107503680A CN201710761898.8A CN201710761898A CN107503680A CN 107503680 A CN107503680 A CN 107503680A CN 201710761898 A CN201710761898 A CN 201710761898A CN 107503680 A CN107503680 A CN 107503680A
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- Prior art keywords
- inner sleeve
- drilling rod
- hole hammer
- drilling
- booster body
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- 238000005553 drilling Methods 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 230000000694 effects Effects 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification 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
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
-
- 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of ground major diameter fast pore-creating drilling equipment and its method, outer tube including being arranged in inwall at well head, wellhead flange is equipped with the top of outer tube, it is characterized in that, inner sleeve is fixed with wellhead flange intermediate coaxial, the external diameter of inner sleeve is less than the internal diameter of outer tube, it is arranged with inner sleeve bottom section portion with pipe booster body, drilling rod is coaxially provided with inner sleeve, the external diameter of drilling rod is less than the internal diameter of inner sleeve, compressed air channel is provided with drilling rod, annular space between drilling rod and inner sleeve arranges passage for landwaste is counter, well mouth sealing device is provided with the top of drilling rod, landwaste slag-drip opening is provided with well mouth sealing device, the well mouth sealing device is threadedly coupled with inner sleeve, pneumatic down-hole hammer is connected with the bottom of drilling rod, pneumatic down-hole hammer is located at below pipe booster body；So as to improve spudder's task efficiency, mine rescue efficiency is further improved.
Description
Technical field
The invention belongs to ground drilling emergency technique field, more particularly to a kind of ground major diameter fast pore-creating drilling equipment
And its method.
Background technology
At present, ground rapid drilling has become a new technology of mine rescue, is got through for mine rescue
One " life channel ", the perfect rescue of especially Chilean mine disaster and the mine disaster of China Pingyi, it was demonstrated that the technology is quick, effect
Significantly.But the step for getting through simply mine rescue key of " life channel ", to rescue trapped personnel, it is also necessary to
" passway for escaping " is major diameter well（Hole diameter is not less than φ 650mm）Foundation.At present, the main technique of " passway for escaping " is just to follow
Ring pneumatic down-hole hammer drilling technology and reacting cycle pneumatic down-hole hammer drilling technology.The former air requirement is big, need to put into 8-10 platforms sky
Press, cost are high；The latter needs to configure a full set of special-purpose machines and tools, and requires higher to formation condition, and enforcement difficulty is big, and cost
It is higher.In consideration of it, a set of brand-new rapid construction major diameter " passway for escaping " of research has important reality into well technology and its equipment
Meaning.
The content of the invention
It is quick the present invention seeks to propose a kind of ground major diameter for the above-mentioned problems of the prior art of solution
Pore-forming drilling equipment and its method.Adopted the technical scheme that to reach above-mentioned purpose：
A kind of ground major diameter fast pore-creating drilling equipment, including the outer tube of inwall at well head is arranged in, on the top of outer tube
Portion is equipped with wellhead flange, and inner sleeve is fixed with wellhead flange intermediate coaxial, and the external diameter of inner sleeve is less than the internal diameter of outer tube,
It is arranged with inner sleeve bottom section portion with pipe booster body, drilling rod is coaxially provided with inner sleeve, the external diameter of drilling rod is less than inner sleeve
Internal diameter, compressed air channel is provided with drilling rod, the annular space between drilling rod and inner sleeve arranges passage for landwaste is counter, is boring
The top of bar is provided with well mouth sealing device, is provided with landwaste slag-drip opening on well mouth sealing device, the well mouth sealing device with it is interior
Casing threads is connected, and pneumatic down-hole hammer is connected with the bottom of drilling rod, and pneumatic down-hole hammer is located at below pipe booster body.
Preferably, it is described to include coaxially being set in the moving casing on the outside of inner sleeve with pipe booster body, moving casing
Diameter is more than the diameter of inner sleeve, is coaxially provided with grid bottom plate in the inner bottom part of moving casing, the grid bottom plate includes being arranged
Short tube is fixed on the outside of drilling rod, the diameter of fixed short tube is more than the diameter of drilling rod, between fixed short tube and moving casing inwall
Multiple radial direction baffle plates are welded with around circumferential；Closure is integrally formed with the top of moving casing, the closure is slided with drilling-rod external wall
It is dynamic to connect, it is welded with the drilling rod in moving casing for the retainer ring spacing to moving casing.
Preferably, down-hole hammer impactor, the down-hole hammer impactor top are installed between drilling rod and pneumatic down-hole hammer
It is connected with drilling rod bottom thread, down-hole hammer impactor bottom is connected with pneumatic down-hole hammer screw top.
Preferably, it is seated at the top of down-hole hammer impactor under self gravitation effect with pipe booster body, is pressurized when with pipe
Positioned at when most pushing up position, the distance between retainer ring and closure are the length of a section inner sleeve for mechanism.
Preferably, the drilling rod is kelly bar, is provided with casing elevator in interior cannula tip, casing elevator is located at wellhead flange
Top, sealing ring is provided between wellhead flange and inner sleeve pipe outer wall.
Preferably, the well mouth sealing device is three-level sealing mechanism.
A kind of boring method carried out using ground major diameter fast pore-creating drilling equipment as described above, including following step
Suddenly：
A：Inwall installs outer tube first at well head, then transfers pneumatic down-hole hammer, down-hole hammer impactor and drilling rod to outer
Sleeve pipe inner bottom part, then transfer, allowed with pipe booster body and phase at the top of down-hole hammer impactor by inner sleeve and with pipe booster body
Untill contact；
B：Wellhead flange and well mouth sealing device are installed, landwaste slag-drip opening is installed on well mouth sealing device；
C：Drilling rod top is connected with top-drive device, while is connected with air compressor machine by high-pressure hose, starts rig and sky
Press, compressed air enter pneumatic down-hole hammer by compressed air channel, driving pneumatic down-hole hammer acting, drive pneumatic down-hole hammer and
Drill bit turns round and carries out impact rotating detritus drilling；Compressed air duct, pneumatic down-hole hammer, drill bit enter compressed air successively
Shaft bottom, then drive landwaste through down-hole hammer impactor and borehole wall annular space, with pipe booster body, landwaste is counter arranges passage, landwaste deslagging
Mouth returns to ground；
D：During pneumatic down-hole hammer and drill bit advance, it is seated in all the time under self gravitation effect with pipe booster body latent
Moved downwardly together at the top of drift impactor, when moving downward a section inner sleeve length of tube, retainer ring plays limit to closure
Position effect, inner sleeve then is saved from well head decentralization one, the moving range of a section inner sleeve length of tube is regained with pipe booster body,
The like until complete drilling well.
Preferably, in stepb, casing elevator is installed in interior cannula tip.
The advantageous effect of present invention is that：（1）Arranged using the landwaste for being arranged inner sleeve on the outside of drilling rod and being formed is counter
Passage, substantially reduce the size of original annular space, keep landwaste is counter arrange minimum wind speed 15m/s on the premise of, it is smaller
Landwaste is counter to arrange that passage required airflow is smaller, and so the quantity of bottom surface air compressor machine requirement is also reduced to 3 by the 8-10 platforms of routine,
Carry out mine rescue when, it is necessary to wellsite facility it is less, well layout and drilling well can be rapidly completed, to narrow and small rescue site
With stronger adaptability and economy.
（2）Diameter with the moving casing 9 of pipe booster body is more than the diameter of inner sleeve 6, in landwaste flow identical feelings
Under condition, the flow velocity of moving casing 9 is slow, and pressure is big, and the flow velocity of inner sleeve 6 is fast, and pressure is small, so as to ensure that pressure difference, realizes to landwaste
Quick anti-row；Simultaneously during drilling well, it can at any time be followed up with pipe booster body, remain this pressure difference,
It during mine rescue, can largely shorten rescue time, improve rescue efficiency.
（3）The setting of well mouth sealing device, during the drilling operation of reality, demobilization gas is to driller's in reduction
Harm and the interference of efficiency of construction, can provide good well head operating environment, so as to improve driller's for driller
Operating efficiency, further improve mine rescue efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of grid bottom plate.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, a kind of ground major diameter fast pore-creating drilling equipment, including it is arranged in inwall at well head
Outer tube 7, wellhead flange 1 is equipped with the top of outer tube 7, inner sleeve 6, inner sleeve are fixed with the intermediate coaxial of wellhead flange 1
The external diameter of pipe 6 is less than the internal diameter of outer tube 7, is arranged with the bottom section portion of inner sleeve 6 with pipe booster body, coaxial in inner sleeve 6
Provided with drilling rod 5, the external diameter of drilling rod 5 is less than the internal diameter of inner sleeve 6, is provided with compressed air channel 15 in drilling rod 5, drilling rod 5 with it is interior
Annular space between sleeve pipe 6 arranges passage 14 for landwaste is counter, is provided with well mouth sealing device 3 at the top of drilling rod 5, the well head is close
Seal apparatus 3 is three-level sealing mechanism, is provided with landwaste slag-drip opening 4 on well mouth sealing device 3, the well mouth sealing device 3 with it is interior
Sleeve pipe 6 is threadedly coupled, and pneumatic down-hole hammer 12 is connected with the bottom of drilling rod 5, and pneumatic down-hole hammer 12 is located at under pipe booster body
Side.
The moving casing 9 for including coaxially being set in the outside of inner sleeve 6 with pipe booster body, the diameter of moving casing 9
More than the diameter of inner sleeve 6, grid bottom plate 10 is coaxially provided with the inner bottom part of moving casing 9, as shown in Fig. 2 the grid bottom
Plate 10 includes being set in the fixed short tube 16 in the outside of drilling rod 5, and the diameter of fixed short tube 16 is more than the diameter of drilling rod 5, in fixed short tube
16 are circumferentially welded with multiple radial direction baffle plates 17 and form grid channels with the spaced winding of the inwall of moving casing 9；At the top of moving casing 9
Closure 8 is integrally formed with, the closure 8 is slidably connected with the outer wall of drilling rod 5, and use is welded with the drilling rod 5 in moving casing 9
In the retainer ring 13 spacing to moving casing 9.
In order to further landwaste smash be easy to it is counter arrange, down-the-hole is installed between drilling rod 5 and pneumatic down-hole hammer 12
Hammering blow device 11, the top of the down-hole hammer impactor 11 be connecteds with the bottom thread of drilling rod 5, the bottom of down-hole hammer impactor 11 and pneumatically
The screw top of down-hole hammer 12 connects；Now, down-hole hammer impactor 11 is seated under self gravitation effect with pipe booster body to push up
Portion, when with pipe booster body positioned at most top position, the distance between retainer ring 13 and the top of closure 8 are a section inner sleeve 6
Length.
The drilling rod 5 can also be kelly bar, be provided with casing elevator 2 at the top of inner sleeve 6, casing elevator 2 is located at well head
The top of flange 1, is provided with sealing ring outside wellhead flange 1 and inner sleeve between 6 walls.
A kind of boring method carried out using upper described ground major diameter fast pore-creating drilling equipment, including following step
Suddenly：
A：Inwall installs outer tube 7 first at well head, then by under pneumatic down-hole hammer 12, down-hole hammer impactor 11 and drilling rod 5
Put to the inner bottom part of outer tube 7, then transfer, allowed with pipe booster body and down-the-hole hammering blow by inner sleeve 6 and with pipe booster body
Untill the top of device 11 is in contact；
B：Wellhead flange 1 and well mouth sealing device 3 are installed, landwaste slag-drip opening 4 is installed on well mouth sealing device 3；
C：The top of drilling rod 5 is connected with top-drive device, while is connected with air compressor machine by high-pressure hose, starts rig and sky
Press, compressed air enter pneumatic down-hole hammer 12 by compressed air channel 15, and driving pneumatic down-hole hammer 12 does work, and drive pneumatic latent
Drift 12 and drill bit turn round and carry out impact rotating detritus drilling；Compressed air compressed air duct 15, aeratic hidden hole successively
Hammer 12, drill bit enter shaft bottom, then drive landwaste through down-hole hammer impactor with borehole wall annular space, with pipe booster body, landwaste is counter arranges
Passage 14, landwaste slag-drip opening 4 return to ground；
D：During pneumatic down-hole hammer 23 and drill bit advance, it is seated in all the time under self gravitation effect with pipe booster body
Moved downwardly together at the top of down-hole hammer impactor 22, when moving downward section 6 length of inner sleeve, retainer ring 13 is to closure
8 play position-limiting action, and then from the section inner sleeve 6 of well head decentralization one, the length of a section inner sleeve 6 is regained with pipe booster body
Moving range, the like until complete drilling well.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown is only for ease of the description present invention and simplifies description, rather than instruction or the device for inferring meaning
Or element must have specific orientation, be specific azimuth configuration and operation, thus it is not intended that in present invention protection
The limitation of appearance.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic,
But these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (8)
1. a kind of ground major diameter fast pore-creating drilling equipment, including the outer tube of inwall at well head is arranged in, in outer tube
Top is equipped with wellhead flange, it is characterised in that is fixed with inner sleeve in wellhead flange intermediate coaxial, the external diameter of inner sleeve is less than
The internal diameter of outer tube, be arranged with inner sleeve bottom section portion with pipe booster body, be coaxially provided with drilling rod in inner sleeve, drilling rod it is outer
Footpath is less than the internal diameter of inner sleeve, compressed air channel is provided with drilling rod, the annular space between drilling rod and inner sleeve is landwaste
Anti- row's passage, is provided with well mouth sealing device at the top of drilling rod, landwaste slag-drip opening, the well head is provided with well mouth sealing device
Sealing device is threadedly coupled with inner sleeve, and pneumatic down-hole hammer is connected with the bottom of drilling rod, and pneumatic down-hole hammer is located to be pressurized with pipe
Below mechanism.
2. major diameter fast pore-creating drilling equipment in ground according to claim 1, it is characterised in that described with pipe supercharger
Structure includes coaxially being set in the moving casing on the outside of inner sleeve, and the diameter of moving casing is more than the diameter of inner sleeve, in movable sleeve
The inner bottom part of pipe is coaxially provided with grid bottom plate, and the grid bottom plate includes being set in fixed short tube on the outside of drilling rod, fixed short tube
Diameter is more than the diameter of drilling rod, and multiple radial direction baffle plates are circumferentially welded with the spaced winding of fixed short tube and moving casing inwall；In work
Dynamic cannula tip is integrally formed with closure, and the closure is slidably connected with drilling-rod external wall, is welded on the drilling rod in moving casing
It is connected to for the retainer ring spacing to moving casing.
3. major diameter fast pore-creating drilling equipment in ground according to claim 2, it is characterised in that in drilling rod and pneumatically latent
Down-hole hammer impactor is installed between drift, is connected at the top of the down-hole hammer impactor with drilling rod bottom thread, down-the-hole hammering blow
Device bottom is connected with pneumatic down-hole hammer screw top.
4. major diameter fast pore-creating drilling equipment in ground according to claim 3, it is characterised in that exist with pipe booster body
Be seated under self gravitation effect at the top of down-hole hammer impactor, when with pipe booster body positioned at most push up position when, retainer ring with it is close
The distance between capping is the length for saving inner sleeve.
5. the ground major diameter fast pore-creating drilling equipment according to any one of Claims 1-4, it is characterised in that described
Drilling rod is kelly bar, and casing elevator is provided with interior cannula tip, and casing elevator is located above wellhead flange, wellhead flange with it is interior
Sealing ring is provided between sleeve outer wall.
6. the ground major diameter fast pore-creating drilling equipment according to any one of Claims 1-4, it is characterised in that described
Well mouth sealing device is three-level sealing mechanism.
A kind of 7. drilling well that ground major diameter fast pore-creating drilling equipment using as described in any one of claim 1 to 6 is carried out
Method, it is characterised in that comprise the following steps：
A：Inwall installs outer tube first at well head, then transfers pneumatic down-hole hammer, down-hole hammer impactor and drilling rod to outer
Sleeve pipe inner bottom part, then transfer, allowed with pipe booster body and phase at the top of down-hole hammer impactor by inner sleeve and with pipe booster body
Untill contact；
B：Wellhead flange and well mouth sealing device are installed, landwaste slag-drip opening is installed on well mouth sealing device；
C：Drilling rod top is connected with top-drive device, while is connected with air compressor machine by high-pressure hose, starts rig and sky
Press, compressed air enter pneumatic down-hole hammer by compressed air channel, driving pneumatic down-hole hammer acting, drive pneumatic down-hole hammer and
Drill bit turns round and carries out impact rotating detritus drilling；Compressed air duct, pneumatic down-hole hammer, drill bit enter compressed air successively
Shaft bottom, then drive landwaste through down-hole hammer impactor and borehole wall annular space, with pipe booster body, landwaste is counter arranges passage, landwaste deslagging
Mouth returns to ground；
D：During pneumatic down-hole hammer and drill bit advance, it is seated in all the time under self gravitation effect with pipe booster body latent
Moved downwardly together at the top of drift impactor, when moving downward a section inner sleeve length of tube, retainer ring plays limit to closure
Position effect, inner sleeve then is saved from well head decentralization one, the moving range of a section inner sleeve length of tube is regained with pipe booster body,
The like until complete drilling well.
8. boring method according to claim 7, it is characterised in that in stepb, Casing elevator is installed in interior cannula tip
Card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710761898.8A CN107503680B (en) | 2017-08-30 | 2017-08-30 | Ground large-diameter rapid drilling equipment and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710761898.8A CN107503680B (en) | 2017-08-30 | 2017-08-30 | Ground large-diameter rapid drilling equipment and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107503680A true CN107503680A (en) | 2017-12-22 |
| CN107503680B CN107503680B (en) | 2023-07-28 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710761898.8A Active CN107503680B (en) | 2017-08-30 | 2017-08-30 | Ground large-diameter rapid drilling equipment and method thereof |
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| Country | Link |
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| CN (1) | CN107503680B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612472A (en) * | 2018-06-14 | 2018-10-02 | 东莞伊思美制衣有限公司 | A kind of reacting cycle formula list drill bit pneumatic down-hole hammer rotary digging environmental protection direct exhaust device |
| CN113294090A (en) * | 2021-06-11 | 2021-08-24 | 广州海洋地质调查局 | Integrated drilling string suitable for deep water shallow hydrate development and drilling method |
| CN114000847A (en) * | 2021-11-11 | 2022-02-01 | 河南豫中地质勘查工程有限公司 | Full-automatic orifice sealing and related operation system for gas drilling |
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| CN106837176A (en) * | 2017-03-22 | 2017-06-13 | 中国矿业大学(北京) | A kind of laser rock fragmenting method and apparatus for drilling well |
| CN207122281U (en) * | 2017-08-30 | 2018-03-20 | 河南豫中地质勘察工程公司 | A kind of major diameter is with pipe drilling equipment |
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| CN2046920U (en) * | 1989-04-14 | 1989-11-01 | 李任年 | Gas lift counter-circulating simple drill |
| CN1136126A (en) * | 1995-05-01 | 1996-11-20 | 日立建机株式会社 | Borehole boring method and machine |
| US20090101413A1 (en) * | 2005-06-10 | 2009-04-23 | Geomechanik Wasser-Und Umwelttechnik Gmbh | DTH-hammer drilling device and overburden drilling method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108612472A (en) * | 2018-06-14 | 2018-10-02 | 东莞伊思美制衣有限公司 | A kind of reacting cycle formula list drill bit pneumatic down-hole hammer rotary digging environmental protection direct exhaust device |
| CN113294090A (en) * | 2021-06-11 | 2021-08-24 | 广州海洋地质调查局 | Integrated drilling string suitable for deep water shallow hydrate development and drilling method |
| CN113294090B (en) * | 2021-06-11 | 2023-12-12 | 广州海洋地质调查局 | Integrated drilling tubular column suitable for deep water shallow layer hydrate development and drilling method |
| CN114000847A (en) * | 2021-11-11 | 2022-02-01 | 河南豫中地质勘查工程有限公司 | Full-automatic orifice sealing and related operation system for gas drilling |
| CN114000847B (en) * | 2021-11-11 | 2023-07-18 | 河南豫中地质勘查工程有限公司 | Full-automatic orifice sealing and related operation system for gas drilling |
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| Publication number | Publication date |
|---|---|
| CN107503680B (en) | 2023-07-28 |
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