CN104314497B - Rock core sealing device for hydraulic pressurized type coring tool - Google Patents
Rock core sealing device for hydraulic pressurized type coring tool Download PDFInfo
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- CN104314497B CN104314497B CN201410427679.2A CN201410427679A CN104314497B CN 104314497 B CN104314497 B CN 104314497B CN 201410427679 A CN201410427679 A CN 201410427679A CN 104314497 B CN104314497 B CN 104314497B
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- rock core
- core
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- cartridge module
- annular
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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, core extractors
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Earth Drilling (AREA)
Abstract
The invention discloses a rock core sealing device for a hydraulic pressurized type coring tool. The rock core sealing device comprises a safety joint, a release gear, an outer barrel assembly, an inner barrel assembly and a core catcher assembly, wherein the safety joint serves as a cone with hollow bottom and top and a larger upper part and a smaller lower part; the middle part of the safety joint is in threaded connection with the outer barrel assembly, and the lower part thereof is in threaded connection with the release device; the inner barrel assembly is arranged below the release device; the core catcher assembly is arranged below the inner barrel assembly; the release device, the inner barrel assembly and the core catcher assembly are positioned in the outer barrel assembly. The rock core sealing device for the hydraulic pressurized type coring tool disclosed by the invention can reasonably utilize the hydraulic pressure of the drilling fluid to completely encapsulate the crushed core; when the core catcher assembly is plastically deformed to certain degree, the drilling fluid is discharged from a gap between a rock core seal cartridge and an adapter sleeve, so that the rock core is not over-compressed, and the integrity of the rock core is ensured. Finally, the purpose that the rock core seal cartridge completely encapsulates the crushed core can be achieved; furthermore, the coring yield rate on a soft and broken stratum can be ensured.
Description
Technical field
The invention belongs to drilling and coring delivery field is and in particular to a kind of rock core being applied to pressurized coring tool that surges seals
Device.
Background technology
In soft, broken formation coring operation, it is primarily present a following difficult problem: formation cementation thing low intensity causes rock core
It is difficult to shape, be difficult to enter coring tool.When rock core cement has compared with strong retraction, rock core under water-base drilling fluid erosion
Bearing capacity reduces, it is broken easily to cave in, and causes the stifled heart, the generation of mill heart phenomenon, thus affecting CORING TECHNOLOGY index.In cementing pine
During scattered, heterogeneity conglomeratic sand conglomerate is cored, core bit and tool vibration easily cause rock core fracture, crush.The going out of rock core
During cylinder, because core column stress changes, rock core easily caves in broken, reduces the sampling model of rock core geological analysis
Enclose, reduce the accuracy of geologic information.Because the presence of these difficult problems is so that difficult in soft, broken formation coring operation
Degree is big, core recovery is relatively low.In prior art for coring tool used in soft, broken formation coring operation still relatively
For backwardness, average core recovery is extremely low, is susceptible to rock core draw tube when using or the accident such as rock core drops.Therefore, urgently
Need to research and develop a kind of soft, broken formation the coring tool of adaptation, to meet field demand.
Content of the invention
Present invention aim at providing a kind of structure simple, easy to use, fully wrapped around broken rock core can be reached, prevent
Rock core draw tube or rock core the generation of accident such as drop, and effectively improves the pressurized coring tool that surges that are applied to of core recovery
Rock core sealing device.
For realizing above-mentioned technical purpose, using technical scheme below:
A kind of rock core sealing device being applied to pressurized coring tool that surges, including safety joint, release device, outer tube
Assembly, interior cartridge module and core grabber assembly, wherein safety joint are bottom and the up big and down small cone of top hollow, connect safely
Centriciput is threadeded with outer barrel component, threadeded with release device in bottom；Interior cartridge module is arranged at below release device, rock
Heart claw assembly is arranged at below interior cartridge module, and release device, interior cartridge module and core grabber assembly are located in outer barrel component；Drilling well takes
After hearty cord bundle, hydraulic coupling is applied to release device, come off after release device is pressurized, interior cartridge module and core grabber assembly are with suspension dress
Put and decline together.Described core grabber assembly includes adapter sleeve, rock core sealing shroud, clip and clip seat, and adapter sleeve side wall is provided with
At least two pressure holes, rock core sealing shroud is arranged inside adapter sleeve, and pressure holes are sealed；Adapter sleeve side-wall outer side face, pressure
It is provided with annular protrusion one below hole；Clip seat is arranged at below adapter sleeve, and clip is arranged in clip seat.For convenience of description,
Do following abbreviation: suspension arrangement comes off, interior cartridge module is declined with suspension arrangement with core grabber assembly, the distance letter that it declines
Referred to as dropping distance.The width of the convex top of annular protrusion one is a convex width, and the width of the convex top of annular protrusion two is
Convex two is wide, during the vertical dimension between the convex top midpoint of annular protrusion one and the convex top midpoint of annular protrusion two is convex
Away from.Outer barrel component includes outer tube, Pressurized short joint and protection pipe nipple, and Pressurized short joint is arranged at below outer tube and is located at outside adapter sleeve
Side, protection pipe nipple is arranged at below Pressurized short joint and is located at outside clip seat, and Pressurized short joint inside sidewalls face is provided with convex annular
Play two；Annular protrusion two is located at below annular protrusion one, and its convex top seals interior cartridge module and outer barrel component after contacting with each other
Between annular space space, convex middle-range more than dropping distance deduct 1/2nd convex one wide deduct again 1/2nd convex two wide, be less than
Dropping distance adds that 1/2nd convex one wide add 1/2nd convex two wide, the i.e. convex top midpoint of annular protrusion one and rings
Vertical dimension between the convex top midpoint of shape projection two is removed with suspension arrangement one with core grabber assembly more than interior cartridge module
The width of the convex top that the distance of fall deducts 1/2nd annular protrusions one deducts the projection of 1/2nd annular protrusions two again
The width at top, add 1/2nd convex annular less than interior cartridge module and core grabber assembly with the distance that suspension arrangement declines
Rise one convex top width add 1/2nd annular protrusions two convex top width.
Described outer barrel component also includes difference pipe nipple, and difference pipe nipple is arranged above or below outer tube, for adjusting outer tube
Assembly entire length.
Described convex middle-range is equal to dropping distance, i.e. the raised top of the convex top midpoint of annular protrusion one and annular protrusion two
The distance that vertical dimension between portion midpoint is declined with suspension arrangement with core grabber assembly equal to interior cartridge module.
The present invention has the beneficial effects that: can rationally utilize the hydraulic coupling of drilling fluid to realize fully wrapped around to broken rock core
Purpose.During drilling and coring delivery, drilling fluid flows into the annular section between inner/outer tube after safety joint flows through release device,
Flow out through bit port after, realize shaft bottom landwaste is taken back the purpose on ground.Drilling and coring delivery applies to release device after terminating
Hydraulic coupling, comes off after release device is pressurized, interior cartridge module is declined with suspension arrangement with core grabber assembly.Annular is made after decline
The convex top of projection one and annular protrusion two contacts with each other, thus the annular space sealing between interior cartridge module and outer barrel component is empty
Between.Due to the annular space space between interior cartridge module and outer barrel component sealed so that drilling fluid hydraulic coupling from pressure holes to rock
Heart sealing shroud presses, and leads to rock core sealing shroud that strong plastic deformation occurs.The plastic deformation of rock core sealing shroud reaches necessarily simultaneously
During degree, drilling fluid is released with adapter sleeve gap from rock core sealing shroud, makes rock core will not be subject to excess compression, protects the complete of positive rock core
Whole property.Finally realize the rock core sealing shroud purpose fully wrapped around to broken rock core.Unexpectedly ensure that and take soft, broken formation
Heart yield rate.
Brief description
Fig. 1 is the structural representation during drilling and coring delivery of the present invention.
Fig. 2 is the a-a generalized section of Fig. 1.
Fig. 3 is the c enlarged schematic partial view of Fig. 2.
Fig. 4 terminate for drilling and coring delivery of the present invention after structural representation.
Fig. 5 is the f directional profile schematic diagram of Fig. 4.
Fig. 6 is the e enlarged schematic partial view of Fig. 5.
Fig. 7 is release device structural representation.
Fig. 8 is the h-h generalized section of Fig. 7.
In accompanying drawing: 1- safety joint, 2- release device, 3- interior cartridge module, 4- Pressurized short joint, 5- adapter sleeve, 6- rock core is close
Big envelope, 7- annular protrusion one, 8- annular protrusion two, 9- clip seat, 10- clip, 11- protection pipe nipple, 12- pressure holes.
Specific embodiment
As shown in Figure 1, Figure 2 and Figure 3, a kind of rock core sealing device being applied to pressurized coring tool that surges, including peace
Full joint 1, release device 2, outer barrel component, interior cartridge module 3 and core grabber assembly, wherein safety joint 1 are in bottom and top
Empty up big and down small cone, being threadeded with outer barrel component in safety joint 1 middle part, is threadeded with release device 2 in bottom；Interior
Cartridge module 3 is arranged at below release device 2, and core grabber assembly is arranged at below interior cartridge module 3, release device 2, interior cartridge module 3
It is located in outer barrel component with core grabber assembly；As shown in Figure 7 and Figure 8, described core grabber assembly includes adapter sleeve 5, rock core sealing
Set 6, clip 10 and clip seat 9, adapter sleeve 5 side wall is provided with least two pressure holes 12, and rock core sealing shroud 6 is arranged at adapter sleeve
Inside 5, pressure holes 12 are sealed；It is provided with annular protrusion 1 below adapter sleeve 5 side-wall outer side face, pressure holes 12；Clip seat 9
It is arranged at below adapter sleeve 5, clip 10 is arranged in clip seat 9.For convenience of describing, do following abbreviation: suspension arrangement comes off, interior
Cartridge module 3 and core grabber assembly decline with suspension arrangement, and the distance that it declines is referred to as dropping distance.Annular protrusion 1
The width of convex top be convex one wide, the width of the convex top of annular protrusion 28 is convex two wide, annular protrusion 1 convex
Playing the vertical dimension between top center and the convex top midpoint of annular protrusion 28 is convex middle-range.Outer barrel component include outer tube,
Pressurized short joint 4 and protection pipe nipple 11, Pressurized short joint 4 is arranged at below outer tube and is located at outside adapter sleeve 5, and protection pipe nipple 11 is arranged
Outside in Pressurized short joint 4 lower section and positioned at clip seat 9, Pressurized short joint 4 inside sidewalls face is provided with annular protrusion 28；Convex annular
Play 28 and be located at below annular protrusion 1, its convex top seals the ring between interior cartridge module 3 and outer barrel component after contacting with each other
Absolutely empty, convex middle-range more than dropping distance deduct 1/2nd convex one wide deduct again 1/2nd convex two wide, be less than dropping distance
Plus 1/2nd convex one, wide to add 1/2nd convex two wide.Outer barrel component also includes difference pipe nipple, and difference pipe nipple is arranged at
Above or below outer tube, for adjusting outer barrel component entire length.Convex middle-range is equal to dropping distance.The present invention can rationally utilize
The hydraulic coupling of drilling fluid realizes the purpose fully wrapped around to broken rock core.During drilling and coring delivery, drilling fluid is from safety joint 1
Flow through the annular section flowing into after release device 2 between inner/outer tube, after flow out through bit port, realize taking back shaft bottom landwaste
The purpose on ground.As shown in Figure 4, Figure 5 and Figure 6, after drilling and coring delivery terminates, hydraulic coupling is applied to release device 2, release device 2 is subject to
Come off after pressure, interior cartridge module 3 and core grabber assembly decline with suspension arrangement.Annular protrusion 1 and convex annular is made after decline
Rise 28 convex top contact with each other, thus sealing the annular space space between interior cartridge module 3 and outer barrel component.Due to inner core group
Annular space space between part 3 and outer barrel component is sealed so that the hydraulic coupling of drilling fluid is applied to rock core sealing shroud 6 from pressure holes 12
Pressure, leads to rock core sealing shroud 6 that strong plastic deformation occurs.When rock core sealing shroud 6 plastic deformation simultaneously reaches to a certain degree, bore
Well liquid is released with adapter sleeve 5 gap from rock core sealing shroud 6, makes rock core will not be subject to excess compression, protects the integrity of positive rock core.?
Realize rock core sealing shroud 6 purpose fully wrapped around to broken rock core eventually.Unexpectedly ensure that in soft, broken formation results of coring
Rate.
Claims (3)
1. a kind of rock core sealing device being applied to pressurized coring tool that surges it is characterised in that: include safety joint (1),
Release device (2), outer barrel component, interior cartridge module (3) and core grabber assembly, wherein safety joint (1) are bottom and top hollow
Up big and down small cone, safety joint is threadeded with outer barrel component in the middle part of (1), threadeded with release device (2) in bottom；
Interior cartridge module (3) is arranged at below release device (2), and core grabber assembly is arranged at below interior cartridge module (3), release device (2),
Interior cartridge module (3) and core grabber assembly are located in outer barrel component；Described core grabber assembly includes adapter sleeve (5), rock core sealing shroud
(6), clip (10) and clip seat (9), adapter sleeve (5) side wall is provided with least two pressure holes (12), and rock core sealing shroud (6) sets
It is placed in inside adapter sleeve (5), pressure holes (12) are sealed；Adapter sleeve (5) side-wall outer side face, pressure holes are provided with ring below (12)
Shape projection one (7)；Clip seat (9) is arranged at below adapter sleeve (5), and clip (10) is arranged in clip seat (9)；Outer barrel component bag
Include outer tube, Pressurized short joint (4) and protection pipe nipple (11), Pressurized short joint (4) is arranged at below outer tube and is located at adapter sleeve (5) outward
Side, protection pipe nipple (11) is arranged at below Pressurized short joint (4) and is located at outside clip seat (9), Pressurized short joint (4) inside sidewalls face
It is provided with annular protrusion two (8)；Annular protrusion two (8) is located at below annular protrusion one (7), and its convex top is close after contacting with each other
Annular space space and outer barrel component between for envelope interior cartridge module (3).
2. be applied to the rock core sealing device of pressurized coring tool that surges as claimed in claim 1 it is characterised in that: convex annular
The vertical dimension rising between one (7) convex top midpoint and the convex top midpoint of annular protrusion two (8) is more than interior cartridge module
Deduct the width of the convex top of 1/2nd annular protrusions one (7) with core grabber assembly with the distance that suspension arrangement declines
Deduct the width of convex top of 1/2nd annular protrusions two (8) again, fill with suspension less than interior cartridge module and core grabber assembly
Put the distance declining together and add that the width of the convex top of 1/2nd annular protrusions one (7) adds 1/2nd convex annular
Play the width of two (8) convex top.
3. be applied to the rock core sealing device of pressurized coring tool that surges as claimed in claim 1 it is characterised in that: convex annular
The vertical dimension rising between one (7) convex top midpoint and the convex top midpoint of annular protrusion two (8) is equal to interior cartridge module
The distance declining with suspension arrangement with core grabber assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410427679.2A CN104314497B (en) | 2014-08-27 | 2014-08-27 | Rock core sealing device for hydraulic pressurized type coring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410427679.2A CN104314497B (en) | 2014-08-27 | 2014-08-27 | Rock core sealing device for hydraulic pressurized type coring tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104314497A CN104314497A (en) | 2015-01-28 |
| CN104314497B true CN104314497B (en) | 2017-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410427679.2A Active CN104314497B (en) | 2014-08-27 | 2014-08-27 | Rock core sealing device for hydraulic pressurized type coring tool |
Country Status (1)
| Country | Link |
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| CN (1) | CN104314497B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1411431A1 (en) * | 1986-11-27 | 1988-07-23 | Производственное Геологическое Объединение Центральных Районов Рсфср "Центргеология" | Double core tool |
| CN101435316A (en) * | 2008-12-18 | 2009-05-20 | 中国石油集团长城钻探工程有限公司 | Coring tool for broken stratum |
| CN201606022U (en) * | 2009-12-25 | 2010-10-13 | 大庆石油管理局 | Unconsolidated strata mechanical pressurizing-type closed coring tool |
| CN202914005U (en) * | 2012-11-09 | 2013-05-01 | 中国石油集团川庆钻探工程有限公司 | Core claw assembly suitable for pressurization type coring tool |
| CN203603813U (en) * | 2013-12-09 | 2014-05-21 | 中国石油集团川庆钻探工程有限公司 | Core grabber composite member suitable for sealed coring |
-
2014
- 2014-08-27 CN CN201410427679.2A patent/CN104314497B/en active Active
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| CN104314497A (en) | 2015-01-28 |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: He Chao Inventor after: Yao Jianlin Inventor after: Hu Pan Inventor after: Li Weicheng Inventor after: Liu Bin Inventor after: Xu Jianchao Inventor after: Huang Wei Inventor before: He Chao Inventor before: Hu Pan Inventor before: Li Weicheng Inventor before: Liu Bin |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: HE CHAO HU PAN LI WEICHENG LIU BIN TO: HE CHAO YAO JIANLIN HU PAN LI WEICHENG LIU BIN XU JIANCHAO HUANG WEI |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |