AU2016262162A1 - Shock inducement in core barrel assembly - Google Patents
Shock inducement in core barrel assembly Download PDFInfo
- Publication number
- AU2016262162A1 AU2016262162A1 AU2016262162A AU2016262162A AU2016262162A1 AU 2016262162 A1 AU2016262162 A1 AU 2016262162A1 AU 2016262162 A AU2016262162 A AU 2016262162A AU 2016262162 A AU2016262162 A AU 2016262162A AU 2016262162 A1 AU2016262162 A1 AU 2016262162A1
- Authority
- AU
- Australia
- Prior art keywords
- inner tube
- core barrel
- tube assembly
- assembly
- mechanical shock
- 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.)
- Abandoned
Links
- 230000035939 shock Effects 0.000 title claims abstract description 60
- 230000001939 inductive effect Effects 0.000 claims abstract description 5
- 238000005553 drilling Methods 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000003116 impacting effect Effects 0.000 claims description 4
- 230000002238 attenuated effect Effects 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000005755 formation reaction Methods 0.000 abstract description 3
- 208000001953 Hypotension Diseases 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000000034 method Methods 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
- 125000006850 spacer group Chemical group 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/107—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars
-
- 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
- E21B25/02—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors the core receiver being insertable into, or removable from, the borehole without withdrawing the drilling pipe
-
- 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/107—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars
- E21B31/113—Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars hydraulically-operated
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Marine Sciences & Fisheries (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
A core barrel assembly for a drill string comprising a core barrel, an inner tube assembly removably positionable within the core barrel, and a mechanical shock inducement mechanism for inducing at least one shock, and preferably a plurality of shocks, in the inner tube assembly. This induced shocks help reduce occurrences of blockage of core samples entering the inner tube assembly in fractured or brittle rock formations.
Description
invention:
The present invention generally relates to drilling. More particularly, the present invention relates to wireline core drilling.
Background of the invention:
Wireline core drilling is often used in minerals exploration and geotechnical drilling.
In applications where deep holes are encountered, wireline drilling systems have been developed in order to cut down on the time spent in hoisting and lowering drill strings in order to take a core sample out. In wireline drilling systems, the core sample can be removed from the bottom of the hole without removing the complete drill rod string assembly.
At the end of a core drilling operation, an overshot latching apparatus is lowered on a cable through the drill string until it reaches the core barrel. The overshot latching apparatus then latches onto a retractable inner tube assembly that is fixed in the core barrel during the core drilling operation. Upward pulling of the overshot latching apparatus triggers a release of the inner tube containing the core sample and which can then be hoisted up through the drill string.
However, when the rock being drilled is fractured or brittle, the core sample often has trouble properly entering the core barrel. If core sample blockage occurs, the inner tube assembly must be retrieved without a proper core sample and must be unblocked in order to reattempt a core drilling
WO 2016/179701
PCT/CA2016/050538 operation. In deep drilling operations, this retrieval of the inner tube assembly is time consuming and can cause delays in drilling operations.
Certain solutions that have attempted to address the above-mentioned problems include:
-lubrification of the inner tube assembly of the core barrel;
-the use of various drilling fluids; and
-shaking the entire drill string from top to bottom.
However, the above solutions are not entirely satisfactory.
Hence, in light of the aforementioned, there is a need for a core barrel assembly which, by virtue of its design and components, addresses at least one of the above-mentioned needs.
Summary of the invention:
One object of the present invention is to provide a core barrel assembly which addresses at least one of the above-mentioned needs.
In accordance with an aspect of the present invention, there is provided a core barrel assembly for a drill string comprising:
-a core barrel;
-an inner tube assembly removably positionable within the core barrel; and -a mechanical shock inducement mechanism for inducing at least one shock in the inner tube assembly.
In some implementations, the mechanical shock inducement mechanism induces a plurality of shocks to the inner tube assembly.
In other implementations, the mechanical shock inducement mechanism is actuated by drilling fluid circulating under pressure within the drill string.
WO 2016/179701
PCT/CA2016/050538
In some implementations, the mechanical shock inducement mechanism is actuated and coupled to a rotation of the drill string.
In other implementations, the mechanical shock inducement mechanism is actuated by an electrical power source, such as a battery system.
In other implementations, the mechanical shock inducement mechanism is actuated by a pneumatic source.
In some implementations, the mechanical shock inducement mechanism is integrated with the inner tube assembly or core barrel assembly. In other implementations, the mechanical shock inducement mechanism is not integrated with the inner tube assembly or core barrel assembly.
In some implementations, the mechanical shock inducement mechanism comprises a hammer element being actuated and impacting the inner tube assembly upon an occurrence of a blockage within the inner tube assembly. However, in other implementations the hammer element can be actuated irrespective of the state of blockage of the inner tube assembly.
In other implementations, the mechanical shock inducement mechanism includes a turbine assembly, wherein drilling fluid circulating under pressure within the drill string actuates the turbine assembly thereby causing the turbine assembly to repetitively impact the inner tube assembly, preferably because of the presence of an eccentric feature in the turbine assembly, and upon occurrence of blockage in the inner tube assembly..
This induced shock help reduce occurrences of blockage of core samples entering the inner tube assembly in fractured or brittle rock formations.
WO 2016/179701
PCT/CA2016/050538
The components, advantages and other features of the invention will become more apparent upon reading of the following non-restrictive description of some optional configurations, given for the purpose of exemplification only, with reference to the accompanying drawings.
Brief description of the drawings:
Figures 1A and 1B are side and cut views respectively of a mechanical shock inducement mechanism according to an embodiment of the present invention in an open configuration;
Figures 2A and 2B are side and cut views respectively of the mechanical shock inducement mechanism shown in Figures 1A and 1B in a closed pre-shock configuration;
Figures 3A and 3B are side and cut views respectively of the mechanical shock inducement mechanism shown in Figures 1A and 1B in a closed postshock configuration;
Figures 4A and 4B are side and cut views respectively of the mechanical shock inducement mechanism shown in Figures 1A and 1B showing internal fluid flow in an open configuration;
Figures 5A and 5B are side and cut views respectively of the mechanical shock inducement mechanism shown in Figures 1A and 1B showing internal fluid flow in a closed pre-shock configuration;
Figures 6A and 6B are side and cut views respectively of the mechanical shock inducement mechanism shown in Figures 1A and 1B showing internal fluid flow in a closed post-shock configuration;
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Figures 7A and 7B are exploded side and cut views respectively of the mechanical shock inducement mechanism shown in Figures 1A and 1B;
Figures 8A and 8B are side and cut views respectively of the mechanical 5 shock inducement mechanism shown in Figures 1A and 1B in an open configuration;
Figures 9A, 9B and 9C are side, partially cut and detailed views respectively of a core barrel assembly and a mechanical shock inducement mechanism according to another embodiment of the present invention;
Figures 10A, 10B and 10C are side, partially cut and exploded views respectively of the mechanical shock inducement mechanism shown in Figures 9A to 9C; and
Figures 11 A, 11B and 11C are first side, partially cut and second side views respectively of a mechanical shock inducement mechanism according to another embodiment of the present invention;.
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Detailed description of preferred embodiments of the invention:
In the following description, the same numerical references refer to similar elements. Furthermore, for the sake of simplicity and clarity, namely so as to not unduly burden the figures with several references numbers, not all figures contain references to all the components and features, and references to some components and features may be found in only one figure, and components and features of the present invention illustrated in other figures can be easily inferred therefrom. The embodiments, geometrical configurations, materials mentioned and/or dimensions shown in the figures are optional, and are given for exemplification purposes only.
Furthermore, although the present invention may be used for core barrel assemblies, for example, it is understood that it may be used for other purposes. For this reason, expressions such as “core barrel assembly””, etc. as used herein should not be taken as to limit the scope of the present invention to these applications in particular. These expressions encompass all other kinds of materials, objects and/or purposes with which the present invention could be used and may be useful, as can be easily understood.
The following reference numbers are used to designate components in the present application:
Mechanical shock inducement mechanism
Outer shell
Inner tube assembly
Connector
Locking element
Diffuser
Hammer element
Spring
Spindle
WO 2016/179701
PCT/CA2016/050538
Inner tube cap
Thrust bearing
Shuttle valve
Spacer
Sling sawtooth clutch mechanism
Spindle bearing
Thrust bearing
Lock nut
Compression spring
Compression spring
Turbine assembly
As shown in Figures 1A to 8B, there is provided a mechanical shock inducement mechanism 10 for inducing at least one shock, and preferably a plurality of shocks, in an inner tube assembly according to an embodiment of the present invention. The shock inducement mechanism 10 operates within core barrel assembly for a drill string. The core barrel assembly includes a core barrel and an inner tube assembly 12 removably positionable within the core barrel 14 (note: the core barrel is only shown in Figures 9A to 9C).
In the embodiment shown in Figures 1A to 8B, the mechanical shock inducement mechanism 10 is actuated by drilling fluid circulating under pressure within the drill string. More particularly, the mechanical shock inducement mechanism 10 includes a hammer element 20 that is actuated and impacts the inner tube assembly 12 upon attainment of a built-up drilling fluid pressure within the drill string, as better shown in Figures 1B/4B and 2B/5B. The built-up drilling fluid pressure is attenuated and released after impact of the hammer element 20 onto the inner tube assembly 12 as better shown in Figures 3B/6B.
As explained above, this induced shock help reduce occurrences of
WO 2016/179701
PCT/CA2016/050538 blockage of core samples entering the inner tube assembly in fractured or brittle rock formations.
However, other techniques for inducing at least one or a plurality of shocks in the inner tube assembly that are known to a person of skill in the art can also be used. For example, Figures 9A to 10C illustrate another embodiment of the present invention. In the embodiment shown in Figures 9A to 10C, the mechanical shock inducement mechanism 10 is actuated and coupled to a rotation of the drill string. More particularly, the mechanical shock inducement mechanism 10 includes a sliding sawtooth clutch mechanism 40. The spring 49 is compressed by backward movement of the inner tube assembly when blockage occurs in the inner tube. This backward movement causes the sliding sawtooth clutch mechanism to engage and to repetitively impact the inner tube assembly. These impacts combined with the compression of the spring push the inner tube assembly back into position. Hence core samples that are stuck in the inner tube assembly can be dislodged.
Figures 11A to 11C illustrate another embodiment of the present invention. In this embodiment, the mechanical shock inducement mechanism 10 includes a turbine assembly 51, wherein drilling fluid circulating under pressure within the drill string actuates the turbine assembly 51, thereby causing the turbine assembly 51 to repetitively impact the inner tube assembly, preferably because of the presence of an eccentric feature in the turbine assembly and upon an occurrence of blockage within the inner tube assembly. In some implementations, if there is no blockage within the inner tube assembly, a spring system can prevent the turbine assembly from contacting the hammer element and therefore not unnecessarily impact the inner tube in the absence of the blockage. Once again, if there is blockage, core samples that are stuck in the inner tube assembly can be dislodged.
More generally, in other implementations, the mechanical shock
WO 2016/179701
PCT/CA2016/050538 inducement mechanism comprises a hammer element being actuated and impacting the inner tube assembly through a device, other than a turbine assembly, upon an occurrence of a blockage within the inner tube assembly. However, in other implementations, it can be necessary that the hammer element is actuated irrespective of the state of blockage of the inner tube assembly.
In other implementations, the mechanical shock inducement mechanism is actuated by an electrical power source, such as a battery system.
In other implementations, the mechanical shock inducement mechanism is actuated by a pneumatic source.
In some implementations, the mechanical shock inducement mechanism 15 is integrated with the inner tube assembly or the core barrel assembly. In other implementations, the mechanical shock inducement mechanism is not integrated with the inner tube assembly or core barrel assembly.
Of course, numerous modifications could be made to the above-described 20 embodiments without departing from the scope of the invention, as defined in the appended claims.
WO 2016/179701
PCT/CA2016/050538
Claims (14)
1. A core barrel assembly for a drill string comprising:
-a core barrel;
-an inner tube assembly removably positionable within the core barrel; and -a mechanical shock inducement mechanism for inducing at least one shock in the inner tube assembly.
2. The core barrel assembly according to claim 1, wherein the mechanical shock inducement mechanism induces a plurality of shocks to the inner tube assembly.
3. The core barrel assembly according to claim 1 or 2, wherein the mechanical shock inducement mechanism is actuated and coupled to a rotation of a drill string.
4. The core barrel assembly according to claim 1 or 2, wherein the mechanical shock inducement mechanism is actuated by an electrical power source.
5. The core barrel assembly according to claim 1 or 2, wherein the mechanical shock inducement mechanism is actuated by a pneumatic source.
6. The core barrel assembly according to claim 1 or 2, wherein the mechanical shock inducement mechanism is actuated by drilling fluid circulating under pressure within the drill string.
7. The core barrel assembly according to any one of claims 1 to 6, wherein the mechanical shock inducement mechanism is integrated with the inner tube assembly.
WO 2016/179701
PCT/CA2016/050538
8. The core barrel assembly according to any one of claims 1 to 6, wherein the mechanical shock inducement mechanism is integrated with the core barrel assembly.
9. The core barrel assembly according to claim 6, wherein the mechanical shock inducement mechanism comprises a hammer element being actuated and impacting the inner tube assembly upon attainment of a built-up drilling fluid pressure within the drill string and wherein the built-up drilling fluid pressure is attenuated upon impact of the hammer element onto the inner tube assembly.
10. The core barrel assembly according to claim 3, wherein the mechanical shock inducement mechanism comprises a sliding sawtooth clutch mechanism, and further comprises a spring that is compressible by backward movement of the inner tube assembly upon an occurrence of blockage in the inner tube, the backward movement of the inner tube assembly causing the sliding sawtooth clutch mechanism to engage and to repetitively impact the inner tube assembly, the impacts combined with the compression of the spring pushing the inner tube assembly back into an original position.
11. The core barrel assembly according to claim 6, wherein the mechanical shock inducement mechanism comprises a turbine assembly, wherein drilling fluid circulating under pressure within the drill string actuates the turbine assembly thereby causing the turbine assembly to repetitively impact the inner tube assembly.
12. The core barrel assembly according to claim 11, wherein the turbine assembly comprises an eccentric feature.
13. The core barrel assembly according to claim 11, the turbine assembly
WO 2016/179701
PCT/CA2016/050538 repetitively impacts the inner tube assembly upon an occurrence of a blockage within the inner tube assembly.
14. The core barrel assembly according to claim 1, wherein the mechanical 5 shock inducement mechanism comprises a hammer element being actuated and impacting the inner tube assembly upon an occurrence of a blockage within the inner tube assembly.
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1/6
PCT/CA2016/050538
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2/6
Ο
Fig. 4A Fig. 4B Fig. 5A Fig. 5B Fig. 6A Fig. 6B
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3/6
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4/6
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5/6
Fig. IOC
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6/6
Fig. HA Fig. 11B Fig. 11C
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201562159601P | 2015-05-11 | 2015-05-11 | |
| US62/159,601 | 2015-05-11 | ||
| PCT/CA2016/050538 WO2016179701A1 (en) | 2015-05-11 | 2016-05-11 | Shock inducement in core barrel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2016262162A1 true AU2016262162A1 (en) | 2018-01-04 |
Family
ID=57247624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2016262162A Abandoned AU2016262162A1 (en) | 2015-05-11 | 2016-05-11 | Shock inducement in core barrel assembly |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US20180135374A1 (en) |
| EP (1) | EP3294980A4 (en) |
| AU (1) | AU2016262162A1 (en) |
| BR (1) | BR112017024111A2 (en) |
| CA (1) | CA2985122A1 (en) |
| CL (1) | CL2017002838A1 (en) |
| MX (1) | MX2017014357A (en) |
| PE (1) | PE20180123A1 (en) |
| WO (1) | WO2016179701A1 (en) |
| ZA (1) | ZA201708438B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894507B (en) * | 2020-07-14 | 2022-04-01 | 中钢集团西安重机有限公司 | Radial rapping method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4518051A (en) * | 1983-06-30 | 1985-05-21 | Chevron Research Company | Percussion actuated core sampler |
| US4558749A (en) * | 1983-10-17 | 1985-12-17 | Norton Christensen, Inc. | Anti-jamming core barrels |
| US5601152A (en) * | 1995-03-23 | 1997-02-11 | Boart Longyear Inc. | Vibrator core drilling apparatus |
| CA2676350C (en) * | 2007-01-24 | 2015-12-01 | J. I. Livingstone Enterprises Ltd. | Air hammer coring apparatus and method |
| US7900716B2 (en) * | 2008-01-04 | 2011-03-08 | Longyear Tm, Inc. | Vibratory unit for drilling systems |
| US8127864B2 (en) * | 2008-11-26 | 2012-03-06 | Longyear Tm, Inc. | Hydro-percussive mechanisms for drilling systems |
| CN102661147B (en) * | 2012-05-25 | 2014-12-31 | 北京探矿工程研究所 | Advanced telescopic sampling drilling tool |
-
2016
- 2016-05-11 MX MX2017014357A patent/MX2017014357A/en unknown
- 2016-05-11 PE PE2017002404A patent/PE20180123A1/en not_active Application Discontinuation
- 2016-05-11 WO PCT/CA2016/050538 patent/WO2016179701A1/en active Application Filing
- 2016-05-11 BR BR112017024111A patent/BR112017024111A2/en not_active Application Discontinuation
- 2016-05-11 CA CA2985122A patent/CA2985122A1/en not_active Abandoned
- 2016-05-11 AU AU2016262162A patent/AU2016262162A1/en not_active Abandoned
- 2016-05-11 US US15/573,371 patent/US20180135374A1/en not_active Abandoned
- 2016-05-11 EP EP16791866.3A patent/EP3294980A4/en not_active Withdrawn
-
2017
- 2017-11-09 CL CL2017002838A patent/CL2017002838A1/en unknown
- 2017-12-12 ZA ZA2017/08438A patent/ZA201708438B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CL2017002838A1 (en) | 2018-06-29 |
| EP3294980A1 (en) | 2018-03-21 |
| US20180135374A1 (en) | 2018-05-17 |
| CA2985122A1 (en) | 2017-11-17 |
| EP3294980A4 (en) | 2018-12-05 |
| ZA201708438B (en) | 2019-06-26 |
| WO2016179701A1 (en) | 2016-11-17 |
| PE20180123A1 (en) | 2018-01-18 |
| BR112017024111A2 (en) | 2018-07-31 |
| MX2017014357A (en) | 2018-11-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK1 | Application lapsed section 142(2)(a) - no request for examination in relevant period |