CN109138881B - Core drills through tool - Google Patents
Core drills through tool Download PDFInfo
- Publication number
- CN109138881B CN109138881B CN201810918676.7A CN201810918676A CN109138881B CN 109138881 B CN109138881 B CN 109138881B CN 201810918676 A CN201810918676 A CN 201810918676A CN 109138881 B CN109138881 B CN 109138881B
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- CN
- China
- Prior art keywords
- core
- claw
- drill bit
- blade
- tool
- 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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- 210000000078 claw Anatomy 0.000 claims abstract description 53
- 239000011159 matrix material Substances 0.000 claims abstract description 24
- 239000002826 coolant Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 239000011435 rock Substances 0.000 description 14
- 238000009434 installation Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000003020 moisturizing effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
-
- 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
- E21B10/02—Core bits
-
- 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
- E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
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)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Abstract
Tool is drilled through the present invention relates to core, including core bit, catches core device and inner core tube, and core bit includes outer core pipe and hollow drill bit, and drill bit includes second level blade, is equipped with coolant circuit hole at blade；Catching core device includes annular matrix and multiple claws, and annular matrix is mounted in inner core tube, and claw is uniformly arranged on annular matrix, and claw upper end is inwardly collapsed；Outer core pipe bottom is stretched in inner core tube lower end.The present invention designs the mechanical claw that collapses upward and inwardly, and when claw downlink, claw is easily strutted by core, so that core be made to enter in inner canister；When claw uplink, claw is difficult to be strutted by core, and since core cannot resist the clamping action of biggish pulling force and claw, core is pulled off at claw, and the core of fracture will continue uplink with claw to be maintained in inner cylinder；Coolant circuit hole is set at blade position, coolant liquid can gush out cooling blade by the through-hole, accelerate the cooling velocity of blade, reduce the abrasion of cutter, extend the service life of blade.
Description
Technical field
Equipment technical field is drilled through the present invention relates to core more particularly to core drills through tool.
Background technique
During oil field prospecting, core is discovery oil-gas Layer and research stratum, source bed, oil reservoirs, cap rock, construction etc.
Capsule information lithology, physical property and oil-containing, the gas and water of subterranean strata can directly be understood by the observational study to core
Attitude Characteristics.After the investment exploitation of oil field, oil reservoir deposition characteristics, the physical property of reservoir, hole are further studied and recognized by core
Gap structure, wetability, relative permeability, lithofacies characteristics, reservoir physics simulation and reservoir water flooding rule；Understanding and grasp difference are opened
It hair stage, different water cut stages reservoir water flooding feature, gets remaining oil distribution clear, is designed for oilfield development program, series of strata, well pattern tune
Whole and Encryption Well provides scientific basis.
Coring is that subsurface rock is got on ground blockingly using special coring tool in drilling process, this
The blocking rock of kind is called core, and the various properties of rock can be measured by it, and intuitively Study of The Underground construction and rock are heavy
Product environment, understands fluid properties therein etc..In mineral exploration and development process, need by geological design stratigraphic horizon and
Depth carries out drilling work, the tripping in coring tool into well, the rock sample drilled through out.
Coring tool includes core bit and catches core device, after core bit is cut into stratum, is protected core with core device is caught
It holds in inner cylinder, existing core device of catching can only take soft rock, it is difficult to take hard rock.In addition, the cooling speed of the blade of existing core bit
Degree is slow, and the service life of the quick abrasion of cutter, blade is short.
Summary of the invention
The present invention is intended to provide core drills through tool, catching core device includes the claw inwardly collapsed upward, convenient for taking hard rock.
In order to achieve the above objectives, The technical solution adopted by the invention is as follows:
Core drills through tool, including core bit, catches core device and inner core tube, and the core bit includes outer core pipe and hollow
Drill bit, drill bit connect with the lower end of outer core pipe；
The core device of catching includes annular matrix and multiple claws, and annular matrix is coaxially mounted to the inner wall of inner core tube lower end
On, claw is uniformly arranged on annular matrix, and claw lower end is connect with annular matrix, and claw upper end is inwardly collapsed；The inner core
Outer core pipe bottom, inner core tube and outer core pipe clearance fit are stretched in pipe lower end.
Further, the drill bit includes the first order blade for drilling and the second level blade for reaming.
Further, the drill bit includes interior drill bit and outer drill bit, and the interior drill bit is mounted in outer drill bit, first order knife
Piece is located at interior drill bit lower end, and second level blade is located on outer drill bit lateral wall.
Preferably, there are three the first order blade is set at equal intervals in circumferencial direction, second level blade is in circumferencial direction etc.
It is equipped at intervals with three.
Further, coolant circuit hole is equipped at first order blade and second level blade on drill bit.
Further, outer core pipe and drill bit outer wall are equipped with helicla flute, on the helicla flute on drill bit and outer core pipe
Helicla flute is continuous.
Further, claw includes integrally manufactured vertical arm and inclined arm, and the vertical arm lower end and annular matrix connect
It connects, the lower end connection of vertical arm upper end and inclined arm, the upper end of inclined arm is free end, and inclined arm slopes inwardly from the bottom up.
Preferably, the inclination angle of inclined arm is 60 °.
Wherein, inner core inside pipe wall has graphite ene coatings.Inner wall additional graphite ene coatings, can reduce core in core barrel
Mobile coefficient of friction, the transmitting for reducing heat scatter and disappear, can also reduce influence of the external radiation to core, propose hi-fi quality.
Further, drill bit inner wall is equipped with sealing ring, using elastomeric circumferential sealing ring, realizes in location of the coring procedure to rock
The package of core reaches isolation shelf effect, reaches moisturizing, target of guaranteeing the quality.
Wherein, claw and annular matrix are integrally manufactured, and annular sleeve is set with outside annular matrix, and annular matrix and annular sleeve are solid
It connects；Inner core inside pipe wall has the annular groove being adapted to annular sleeve, and annular sleeve is in annular groove.
Compared with prior art, the invention has the following advantages:
1, the present invention designs the mechanical claw collapsed upward and inwardly, and when claw downlink, claw is easily strutted by core, from
And enter core in inner canister；When claw uplink, claw is difficult to be strutted by core, since core cannot resist biggish drawing
The clamping action of power and claw, core are pulled off at claw, and the core of fracture will continue uplink with claw to be maintained at
In inner cylinder；
2, drill bit is divided into second level blade in the present invention, bores aperture first by the lowermost blade, then expanded by the blade of top
Rate of penetration can be improved in hole, improves coring efficiency；
3, the present invention is respectively provided with through-hole as coolant circuit hole at blade position, and coolant liquid can be sprayed by the through-hole
Blade is cooled down, accelerates the cooling velocity of blade, reduces the abrasion of cutter, extend the service life of blade；
4, the outer wall of outer core pipe be provided with the continuous helicla flute of drill bit, as outer core pipe screws in rock stratum, outer core pipe given
Coring tool creates a confined space, and fidelity cabin can be prevented contaminated；
5, inner core inside pipe wall has graphite ene coatings, can reduce the coefficient of friction that core moves in core barrel, reduces heat
The transmitting of amount is scattered and disappeared, and can also be reduced influence of the external radiation to core, be proposed hi-fi quality.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of inner core tube；
Fig. 3 is the enlarged drawing in Fig. 2 at A；
Fig. 4 is the 3 dimensional drawing for catching core device；
Fig. 5 is the sectional view for catching core device；
Fig. 6 is the structural schematic diagram of core bit；
Fig. 7 is the structural schematic diagram of drill bit；
Fig. 8 is the structural schematic diagram of outer drill body；
Fig. 9 is the structural schematic diagram of interior drill body；
In figure: 1- catches the outer core pipe of core device, 2- inner core tube, 3-, 4- drill bit, 5- coolant circuit hole, 6- helicla flute, 7- annular
Drill bit in set, 8- sealing ring, 11- annular matrix, 12- claw, 21- core tube, 22- core sleeve, 23- annular groove, 41-, outside 42-
Drill bit, 121- vertical arm, 122- inclined arm, 411- first order blade, drill body in 412-, 413- first order blade installation slot,
The outer drill body of the second level 421- blade, 422-, the second level 423- blade installation slot, 424- first order blade avoid notch.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing, to the present invention into
Row is further described.
As a shown in Figure 6, core disclosed by the invention drills through tool, including core bit, catches core device 1 and inner core tube 2, takes
Core drilling tool includes outer core pipe 3 and hollow drill bit 4, and drill bit 4 is connect with the lower end of outer core pipe 3, catches core device 1 under inner core tube 2
On the inner wall at end, 2 lower end of inner core tube stretch to outer 3 bottom of core pipe and with outer 3 clearance fit of core pipe.
As shown in Figure 4,5, catching core device 1 includes annular matrix 11 and multiple claws 12, and claw 12 is uniformly arranged on annular base
On body 11,12 lower end of claw is connect with annular matrix 11, and 12 upper end of claw is inwardly collapsed.Claw 12 has 8-15, it is preferable that card
Pawl 12 has 12.The number of claw 12 can be set as needed, and be not limited to above-mentioned number.
Claw 12 includes integrally manufactured vertical arm 121 and inclined arm 122, and 121 lower end of vertical arm and annular matrix 11 connect
It connects, 121 upper end of vertical arm is connect with the lower end of inclined arm 122, and the upper end of inclined arm 122 is free end, and inclined arm 122 is from lower past
Upper inward slant, the gradient of inclined arm 122 can according to need adjustment.The inclination angle of inclined arm 122 is in present embodiment
60 °, width gradually becomes smaller claw 12 from the bottom up.
Wherein, the thickness of claw 12 is equal with the thickness of annular matrix 11, and claw 12 and annular matrix 11 are integrally manufactured.Ring
It is set with annular sleeve 7 outside shape matrix 11, annular matrix 11 and annular sleeve 7 are affixed.2 inner wall of inner core tube has graphite ene coatings.Such as figure
2, shown in 3, inner core tube 2 includes core tube 21 and core sleeve 22, and 22 upper end of core sleeve is set with the lower end for being fixed on core tube 21, core
22 inner wall of casing has the annular groove 23 being adapted to annular sleeve 7, and annular sleeve 7 is in annular groove 23, the free end direction of claw 12
Top.12 free end of claw is collapsed upward and inwardly, when the claw 12 when catching core device 1 that core passes through hard from the bottom up is easy quilt
It struts, it is on the contrary then difficult.
Drill bit 4 is PCD cutter.As shown in Figure 6,7, drill bit 4 includes interior drill bit 41 and outer drill bit 42, and interior drill bit 41 includes the
Level-one blade 411 and hollow interior drill body 412.As shown in figure 9, interior 412 lower end of drill body has for installing first order blade
411 first order blade installation slot 413, first order blade installation slot 413 are opened on the lower end surface of interior drill body 412, interior drill
There is coolant circuit hole 5 on body 412 at first order blade installation slot 413, which is arcuate socket, and arcuate socket is opened
Mouthful in drill bit 4 front end face and be connected to first order blade installation slot 413.On interior drill body 412 circumferencial direction at equal intervals
If being equipped with coolant circuit hole 5 at each first order blade installation slot 413, each there are three first order blade installation slot 413
First order blade 411 is mounted in first order blade installation slot 413.
Outer drill bit 42 includes second level blade 421 and hollow outer drill body 422.As shown in figure 8, second level blade 421
Outer wall has the second level blade installation slot 423 for installing second level blade 421, and second level blade is installed on outer drill body 422
There is coolant circuit hole 5 at slot 423, which is strip-shaped hole, and strip-shaped hole and second level blade installation slot 423 connect
It is logical.It is set at equal intervals in circumferencial direction there are three second level blade installation slot 423 on outer drill body 422, each second level blade is pacified
It is equipped with coolant circuit hole 5 at tankage 423, is mounted on second level blade 421 in each second level blade installation slot 423.
Interior drill bit 41 is mounted in outer drill bit 42, and there is the first order in the position for corresponding to first order blade 411 on outer drill body 422
Blade avoids notch 424, and first order blade evacuation notch 424 is opened on the front end face of outer drill bit 42, and first order blade 411 is cut
It cuts sword and exposes to outer drill body 422 from first order blade evacuation notch 424.
Interior 412 inner wall of drill body is equipped with sealing ring 8, and sealing ring 8 is located at 411 top of first order blade, and utilization is elastomeric
Circumferential sealing ring realizes the package in location of the coring procedure to core, reaches isolation shelf effect, reach moisturizing, target of guaranteeing the quality.
Drill bit is divided into second level blade in the present invention, bores aperture first by the lowermost first order blade 411, then by top
421 reaming of second level blade, can be improved rate of penetration.Through-hole is respectively provided with as coolant circuit hole 5, cooling at blade position
Liquid can be sprayed by the through-hole, to cool down blade.The present invention cuts rock stratum using the thin lip drill bit of hard alloy orifice, and reduction takes
Disturbance of the core process to stratum guarantees coring integrity degree and quality.
As shown in Fig. 1,6,8, outer core pipe 3 and outer 422 outer wall of drill body are equipped with helicla flute 6, the spiral shell on outer drill body 422
Helicla flute 6 on spin slot 6 and outer core pipe 3 is continuous.The outer core pipe 3 of outer wall setting helicla flute 6, which is equivalent to outside spiral, bores, with outer core
Pipe 3 screws in rock stratum, and outer core pipe 3 creates a confined space to coring tool, and sealing ring 8 is in location of the coring procedure to the packet of core
It wraps up in, prevents fidelity cabin contaminated.
When work, with the drilling of drill bit 4, core enters in inner core tube 2 and passes through among core device 1 from catching, and wears in rock core
Claw 12 can be strutted when crossing the claw 12 of hard；After stopping brill, upwards when lifting, claw 12 is moved up with inner core tube 2, because
It is received in 12 free end of claw, claw 12 is difficult to be strutted by core at this time, since core cannot resist biggish pulling force and claw
The interior receipts of 12 free ends clamp, and core is pulled off at claw 12, and the core of fracture will continue uplink with claw 12 to keep
In inner core tube 2.
Certainly, the present invention can also have other numerous embodiments, without deviating from the spirit and substance of the present invention,
Those skilled in the art can make various corresponding changes and modifications, but these corresponding changes and change according to the present invention
Shape all should fall within the scope of protection of the appended claims of the present invention.
Claims (9)
1. core drills through tool, it is characterised in that: including core bit, catch core device (1) and inner core tube (2), the core bit
Including outer core pipe (3) and hollow drill bit (4), drill bit (4) is connect with the lower end of outer core pipe (3)；
The core device (1) of catching includes annular matrix (11) and multiple claws (12), and annular matrix (11) is coaxially mounted to inner core tube
(2) on the inner wall of lower end, claw (12) is uniformly arranged on annular matrix (11), and claw (12) lower end and annular matrix (1) are even
It connects, claw (2) upper end is inwardly collapsed；Outer core pipe (3) bottom, inner core tube (2) and outer core pipe are stretched in inner core tube (2) lower end
(3) clearance fit；
The drill bit (4) includes the first order blade (411) for drilling and the second level blade (421) for reaming.
2. core according to claim 1 drills through tool, it is characterised in that: the drill bit (4) include interior drill bit (41) and
Outer drill bit (42), the interior drill bit (41) are mounted in outer drill bit (42), and first order blade (411) is located under interior drill bit (41)
End, second level blade (421) are located on outer drill bit (42) lateral wall.
3. core according to claim 1 drills through tool, it is characterised in that: the first order blade (411) is in circumference side
There are three setting at equal intervals, there are three second level blade (421) is set at equal intervals in circumferencial direction.
4. core according to claim 1,2 or 3 drills through tool, it is characterised in that: first order blade on drill bit (4)
(411) and at second level blade (421) it is equipped with coolant circuit hole (5).
5. core according to claim 1 or 2 drills through tool, it is characterised in that: outer core pipe (3) and drill bit (4) are outside
Wall is equipped with helicla flute (6), and the helicla flute (6) on drill bit (4) and the helicla flute (6) on outer core pipe (3) are continuous.
6. core according to claim 1 drills through tool, it is characterised in that: claw (12) includes integrally manufactured vertical arm
(121) connect with inclined arm (122), vertical arm (121) lower end with annular matrix (11), vertical arm (121) upper end with incline
The lower end of oblique arm (122) connects, and the upper end of inclined arm (122) is free end, and inclined arm (122) slopes inwardly from the bottom up.
7. core according to claim 6 drills through tool, it is characterised in that: the inclination angle of inclined arm (122) is 60 °.
8. core according to claim 1 drills through tool, it is characterised in that: inner core tube (2) inner wall has graphite ene coatings.
9. core according to claim 1 or 2 drills through tool, it is characterised in that: drill bit (4) inner wall is equipped with sealing ring (8).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810918676.7A CN109138881B (en) | 2018-08-13 | 2018-08-13 | Core drills through tool |
| PCT/CN2018/108971 WO2020034350A1 (en) | 2018-08-13 | 2018-09-30 | Core drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810918676.7A CN109138881B (en) | 2018-08-13 | 2018-08-13 | Core drills through tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109138881A CN109138881A (en) | 2019-01-04 |
| CN109138881B true CN109138881B (en) | 2019-11-05 |
Family
ID=64792905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810918676.7A Active CN109138881B (en) | 2018-08-13 | 2018-08-13 | Core drills through tool |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109138881B (en) |
| WO (1) | WO2020034350A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112412374B (en) * | 2020-11-18 | 2022-06-10 | 重庆市二零五勘测设计有限公司 | Geological exploration system and construction method thereof |
| CN113482537B (en) * | 2021-07-14 | 2023-08-15 | 深圳大学 | Drilling coring device with flexible drill bit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200075U (en) * | 1986-01-06 | 1987-06-24 | 地质矿产部石油钻井研究所 | Hydraulic three-cylinder type core extractor |
| CA2311275A1 (en) * | 1999-06-10 | 2000-12-10 | Gaz De France | Universal safety device and process for protecting a conduit |
| CN102913162A (en) * | 2012-10-26 | 2013-02-06 | 宝鸡石油机械有限责任公司 | Deep-sea sediment continuous pressure maintaining coring submarine drilling machine and operation method |
| DE202017105037U1 (en) * | 2017-08-22 | 2017-08-28 | SysBohr GmbH | drill bit |
| CN206722783U (en) * | 2017-05-09 | 2017-12-08 | 刘黎旺 | Double-wall drill pipe core Ka Qu mechanisms |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666217B (en) * | 2009-09-16 | 2012-09-12 | 刘宝林 | Core-filling drilling tool of rope side wall |
| CN101761317B (en) * | 2010-01-19 | 2012-05-30 | 中国地质大学（武汉） | Rock sample core taking fixture |
| BR112015010115B1 (en) * | 2012-11-08 | 2021-06-22 | Flexidrill Limited | CORE SAMPLING APPARATUS AND METHOD OF OBTAINING A CORE SAMPLE |
| US9580982B2 (en) * | 2014-02-18 | 2017-02-28 | Baker Hughes Incorporated | Coring tools with improved reliability during core jams, and related methods |
-
2018
- 2018-08-13 CN CN201810918676.7A patent/CN109138881B/en active Active
- 2018-09-30 WO PCT/CN2018/108971 patent/WO2020034350A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200075U (en) * | 1986-01-06 | 1987-06-24 | 地质矿产部石油钻井研究所 | Hydraulic three-cylinder type core extractor |
| CA2311275A1 (en) * | 1999-06-10 | 2000-12-10 | Gaz De France | Universal safety device and process for protecting a conduit |
| CN102913162A (en) * | 2012-10-26 | 2013-02-06 | 宝鸡石油机械有限责任公司 | Deep-sea sediment continuous pressure maintaining coring submarine drilling machine and operation method |
| CN206722783U (en) * | 2017-05-09 | 2017-12-08 | 刘黎旺 | Double-wall drill pipe core Ka Qu mechanisms |
| DE202017105037U1 (en) * | 2017-08-22 | 2017-08-28 | SysBohr GmbH | drill bit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020034350A1 (en) | 2020-02-20 |
| CN109138881A (en) | 2019-01-04 |
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