• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A BORE HOLE PLUG A bore hole plug (10) to be inserted in a bore hole (11) formed in an earth layer (12). Located in the interior (15) of the plug (10) is a bag (14) with a container (16). The container (16) contains a first co-reagent (17) that reacts with a second co-reagent (18) producing expandable substance to cause the bag (14). Co-reagents (17, 18) are allowed to mix after container (16) has been ruptured. 14-A
    公开号:AU2013222055A1
    申请号:U2013222055
    申请日:2013-09-03
    公开日:2014-03-27
    发明作者:Geoffrey Robbins
    申请人:MINTECH Pty Ltd；
    IPC主号:E21B33-126
    专利说明:
    1 A BORE HOLE PLUG FIELD [0001] The present invention relates to bore hole plugs and more particularly to bore hole plugs that expand to engage the internal surfaces of a bore. BACKGROUND [0002] In the mining industry, such as the mining of iron ore and coal, bore holes are drilled for the purposes of placing explosive charges at desired locations in a layer to be mined. [0003] It is not uncommon for bore holes to be damp or wet, which necessitates spacing the charge above the wet or damp area to make best use of the explosive charge. Still further, it is also desirable to have an air space above and/or below the charge so that the air transmits a shock wave. The shock wave assists in breaking up the layer of the mine. [0004] It is known to inflate bore hole plugs so that the plug engages the internal surfaces of the bore hole to fix the plug in position. For example, an inflatable bore hole plug is described in Australian Patent 579395. Further inflatable bore hole plugs are described in Australian Patent 595887 and Australian Patent Application 30436/92. [0005] The abovementioned bore hole plugs mix bicarbonate powder with diluted hydrochloric acid to produce a gas, or use an aerosol can to cause inflation. These systems had a number of disadvantages including the uncontrolled release of the acid and therefore the uncontrolled inflation of the bore hole plug. This makes the plug difficult to locate. Use of aerosol cans is undesirable as they were considered dangerous in a mining environment. When plastic patches are employed, and are intended to be manipulated to provide for the mixing of the bicarbonate and diluted acid, frequently the pouches are not strong enough to survive rough handling and still be able to be activated by hand pressure. OBJECT [0006] It is the object of the present invention to overcome or substantially ameliorate at least one of the above disadvantages.
    2 SUMMARY [0007] There is disclosed herein a bore hole plug including: an expandable bag encompassing an interior; a container having a body and a neck extending from the body, the body containing a flowable first co-reagent, with said body being operatively associated with said interior to provide for the flow of the first co-reagent to said interior; a second co-reagent in said interior; and wherein said neck is fracturable to release the first co-reagent to provide for the flow of the first co-reagent into said interior to mix with the second co-reagent to react therewith to provide an expandable substance to cause said bag to expand. [0008] Preferably, said container is located in said interior. [0009] Preferably, said body includes an end portion having an opening through which the first co-reagent is to flow, said end portion being closed by said neck. [0010] Preferably, said neck includes a cap portion and a neck portion, with said cap portion being threadably engaged with said end portion, and wherein said neck portion is fractured to provide for the flow of the first co-reagent through said opening. [0011] In an alternative preferred form, the neck is integrally formed with the end portion, with said neck having an end extremity and said plug includes a cap closing said end extremity. [0012] Preferably, said neck includes a weakened portion which provides for fracturing of the neck. [0013] Preferably, said weakened portion is a section of said neck having a reduced thickness. [0014] Preferably, said substance is a gas. [0015] Preferably, said gas is selected from a group including carbon dioxide, nitrogen, oxygen,
    H
    2 , SO 2 , S0 3 -, NH 3 , oxides of nitrogen, hydrocarbon gases and halocarbon gases.
    3 [0016] Preferably, the first co-reagent is diluted hydrochloric acid, and said second co-reagent is sodium bicarbonate. [0017] In an alternative preferred form, said substance is a foam. [0018] Preferably, said foam is selected from a group including polystyrene, chlorinated or unchlorinated polyethylene, copolymers of vinylidene fluoride and hexafluoropropylene, polyamides, polytetrafluoroethylene, styrene-acroylonitrite copolymers, polyvinylchloride, polyisocyanurates, polyphenols, epoxy resins, silicone resins, cellulose acetate, cellular rubber, latex foam rubber, urea-formaldehyde resins, polyimides and polyolefins. [0019] Preferably, the co-reagents provide an isocyanate and polyol. [0020] Preferably, the co-reagents comprise a polymeric methylene di-isocyanate and polyetherol. [0021] Preferably, said container is fixed to the bag. [0022] Preferably, the bag includes a transverse seal internally dividing said interior into a first chamber and a second chamber, with the second co-reagent in the second chamber, and the container communicating with the second sub-chamber. [0023] Preferably, the chambers communicate via a restriction. [0024] Preferably, the restriction is provided by an elastic band. [0025] Preferably, the bag is a first bag, and said plug includes a second bag within which the first bag is located. [0026] Preferably, the first bag has an aperture via which the expandable material can leave the first bag to be contained by the second bag. [0027] Preferably, the plug includes a third bag within which the second bag is located. [0028] Preferably, the third bag is located within a fourth bag.
    4 [0029] Preferably, each of the bags is transparent. BRIEF DESCRIPTION OF DRAWINGS [0030] Preferred forms of the present invention will now be described by way of example with reference to the accompanying drawings wherein: [0031] Figure 1 is a schematic elevation of a bore hole plug; [0032] Figure 2 is a further schematic elevation of the bore hole plug of Figure 1; [0033] Figure 3 is a schematic elevation of a modification of the bore hole plug of Figure 1; [0034] Figure 4 is a schematic side elevation of the bore hole plug of Figures 1 or 2 located in a bore hole; [0035] Figure 5 is a schematic enlarged view of a container employed in the bore hole plug of Figures 1, 2 and 3; [0036] Figure 7 is a schematic side elevation of a modification of the bore hole plug of Figure 1; [0037] Figure 8 is a schematic side elevation of the plug of Figure 7 in a folded configuration; [0038] Figure 9 is a schematic side elevation of an inner bag of the plug of Figure 7; [0039] Figure 10 is a schematic side elevation of the bag of Figure 9; and [0040] Figure 11 is a schematic side elevation of the plug of Figure 7 in a bore hole. [0041] Figure 6 is a schematic side elevation of a modification of the container of Figure 4.
    5 DESCRIPTION OF EMBODIMENTS [0042] In Figures 1 and 2 of the accompanying drawings there is schematically depicted a bore hole plug 10. The bore hole plug 10 is intended to be inserted in a bore hole 11 formed in an earth layer 12 to be mined. The bore hole 11 has internal surfaces 13 that are engaged by the bore hole plug 10 to retain the bore hole plug 10 in a desired position in the bore hole 11. [0043] The bore hole plug 10 includes a flexible bag 14 enclosing an interior 15. [0044] Located in the interior 15 is a container 16. The container 16 contains a first co-reagent 17 that is to react to a second co-reagent 18 to produce an expandable substance to cause the bag 14 to expand. [0045] The bore hole plug 10 is lowered into the bore hole 11 and via a flexible line 19 is retained at a desired position in the bore hole 11 while the bag 14 expands and engages the surface 13 to retain the bore hole plug 10 at the desired location. [0046] In the embodiment of Figure 3, the bore hole plug 10 is provided with a tag 20 to which the line 19 is attached. Preferably, the bag 14 includes an elastically deformed band 21 that compresses the bag 14 and divides the interior 15 into a first sub-chamber 22 and a second sub-chamber 23, the second sub-chamber 22 containing the second co-reagent 18. Preferably, a further elongated elastically deformed band 24 compresses the bag 14 against the container 16 to retain the container 16 fixed to the bag 14 in a preferred orientation. [0047] In a first preferred construction, the container 16 includes a hollow body 25 that contains the co-reagent 17. The body 25 terminates at one end with an end portion 26 that provides an opening 27 through which the co-reagent 17 is allowed to flow. Preferably, the end portion 26 is threaded. Closing the opening 27 is a neck 28 that includes a cap portion 29 and a neck portion 30. The cap portion 29 threadably engages the end portion 26 so as to secure the neck 28 to the body 25. The neck portion 30 is elongated and includes a weakened portion 31 that provides for fracturing of the neck 28 to allow the co-reagent 17 to leave the container 16. [0048] The neck portion 30 is of a tubular configuration and has a closed end 32. Preferably, the weakened portion 31 is an area of reduced cross-section to aid in fracturing the neck portion 30.
    6 [0049] As mentioned above, preferably the neck portion 30 is of a tubular configuration. Accordingly by varying the internal diameter of the passage 33 through which the co-reagent 17 is to pass, the flow rate of the co-reagent 17 leaving the body 25 can at least to some degree be controlled. [0050] In the embodiment of Figure 4, the end portion 26 is formed integral with the neck 28, with the neck 28 being provided with a cap 34 that closes the passage 35. The neck 28 includes the weakened portion 31. [0051] Again by determining the internal diameter of the passage 35, the flow rate of the co reagent 17 leaving the opening 27 can aid in controlling the flow rate. [0052] Preferably, the body 25 is a blow moulded bottle, with the container 16 closed so as to be leak proof. [0053] Preferably, the weakened portion 31 is located so as to provide a passage extending to the weakened portion 31 that is about 15cm in length and say approximately 12mm in diameter. This would aid in controlling the flow rate of the co-reagent 17. [0054] In the embodiment of Figure 5, the neck 28 would be formed of brittle material to aid in fracturing the weakened portion 31. In the embodiment of Figure 4, again the neck portion 28 would be formed of brittle material, such as brittle plastics material. [0055] As a particular example, the body 25 may be a "PET" blow moulded bottle. [0056] As one example, the first co-reagent may be an acid, such as citric acid, preferably about 375mls of 20% citric acid solution, and the second co-reagent about 150gms of free sodium bicarbonate, preferably located in a bag that dissolves or is permeable. Approximately 40 litres of carbon dioxide gas will be produced. [0057] Preferably, the bag 14 is formed of nylon and may be formed of an extrusion and transversely sealed. Preferably it is gas impermeable. [0058] In the embodiment of Figure 3, the container 16 is held so that the longitudinal axis is generally upright with the neck portion 28 projecting downwardly.
    7 [0059] In Figures 7 to 11, there is schematically depicted a bore hole plug 100. The plug 100 includes an outer enclosure in the form of a woven "poly" bag 101 that acts as protective cover for the contents of the bag 101. [0060] Located internally of the bag 101 is a first internal bag 102. Preferably the bag 102 is a laminated bag and is transparent. The bag 102 has an interior 103 that is sealingly enclosed. [0061] Located internally of the bag 102 is a second internal bag 104. Preferably the bag 104 is transparent and sealingly encloses an interior 105. Preferably the bag 104 is of a laminated structure. [0062] Located internally of the bag 104 is a reaction bag 106. The reaction bag 106 includes the container 16 described with reference to the previous embodiments. Also located in the bag 106 is the second co-reagent 18. [0063] Like the previous embodiments, the first co-reagent 17 is released by fracturing the neck 28 so that the first co-reagent 17 is allowed to flow and mix with the second co-reagent 18. [0064] In one preferred form of this embodiment, the first co-reagent 17 is a citric acid solution, and the second co-reagent 18 is sodium bicarbonate. When the two co-reagent 17 and 18 mix, carbon dioxide gas is produced. [0065] The carbon dioxide gas produced in the interior of the bag 106 is allowed to escape via a slit (aperture) so as to inflate the bag 104. [0066] When lowered into the bore hole 108 to a desired depth, the slow release of gas through the aperture 107 gradually allows the bag 104 to inflate at the desired location so that the bag 101 frictionally engages the internal surfaces 109 of the bore hole 108 to securely fix the plug 100 at a desired depth in the bore hole 108. [0067] Preferably when inflated the plug 100 has an internal pressure of about 7psi to about l5psi.
    8 [0068] When lowering the bag 101 into the bore hole 108, the bag 101 and its contents are rolled into a cylindrical configuration as shown in Figure 8. A tag 110 attached to the bag 101 supports the plug 100 via a flexible line 111.
    权利要求:
    Claims (23)
    [1] 1. A bore hole plug including: an expandable bag encompassing an interior; a container having a body and a neck extending from the body, the body containing a flowable first co-reagent, with said body being operatively associated with said interior to provide for the flow of the first co-reagent to said interior; a second co-reagent in said interior; and wherein said neck is fracturable to release the first co-reagent to provide for the flow of the first co-reagent into said interior to mix with the second co-reagent to react therewith to provide an expandable substance to cause said bag to expand.
    [2] 2. The plug of claim 1, wherein said container is located in said interior.
    [3] 3. The plug of claim lor 2, wherein said body includes an end portion having an opening through which the first co-reagent is to flow, said end portion being closed by said neck.
    [4] 4. The plug of claim 1, 2 or 3, wherein said neck includes a cap portion and a neck portion, with said cap portion being threadably engaged with said end portion, and wherein said neck portion is fractured to provide for the flow of the first co-reagent through said opening.
    [5] 5. The plug of claim 3, wherein the neck is integrally formed with the end portion, with said neck having an end extremity and said plug includes a cap closing said end extremity.
    [6] 6. The plug of any one of claims 1 to 5, wherein said neck includes a weakened portion which provides for fracturing of the neck.
    [7] 7. The plug of claim 6, wherein said weakened portion is a section of said neck having a reduced thickness.
    [8] 8. The plug of any one of claims 1 to 7, wherein said substance is a gas.
    [9] 9. The plug of claim 8, wherein said gas is selected from a group including carbon dioxide, nitrogen, oxygen, H 2 , SO 2 , S0 3 -, NH 3 , oxides of nitrogen, hydrocarbon gases and halocarbon gases. 10
    [10] 10. The plug of any one of claims 1 to 9, wherein the first co-reagent is diluted hydrochloric acid, and said second co-reagent is sodium bicarbonate.
    [11] 11. The plug of any one of claims 1 to 7, wherein said substance is a foam.
    [12] 12. The plug of claim 11, wherein said foam is selected from a group including polystyrene, chlorinated or unchlorinated polyethylene, copolymers of vinylidene fluoride and hexafluoropropylene, polyamides, polytetrafluoroethylene, styrene-acroylonitrite copolymers, polyvinylchloride, polyisocyanurates, polyphenols, epoxy resins, silicone resins, cellulose acetate, cellular rubber, latex foam rubber, urea-formaldehyde resins, polyimides and polyolefins.
    [13] 13. The plug of any one of claims 1 to 7, wherein the co-reagents provide an isocyanate and polyol.
    [14] 14. The plug of any one of claims 1 to 7, wherein the co-reagents comprise a polymeric methylene di-isocyanate and polyetherol.
    [15] 15. The plug of any one of claims 1 to 14, wherein said container is fixed to the bag.
    [16] 16. The plug of claim 15, wherein the bag includes a transverse seal internally dividing said interior into a first chamber and a second chamber, with the second co-reagent in the second chamber, and the container communicating with the second sub-chamber.
    [17] 17. The plug of any one of claims 1 to 16, wherein the chambers communicate via a restriction.
    [18] 18. The plug of claim 17, wherein the restriction is provided by an elastic band.
    [19] 19. The plug of any one of claims 1 to 17, wherein the bag is a first bag, and said plug includes a second bag within which the first bag is located.
    [20] 20. The plug of claim 19, wherein the first bag has an aperture via which the expandable material can leave the first bag to be contained by the second bag. 11
    [21] 21. The plug of claim 20, further including a third bag within which the second bag is located.
    [22] 22. The plug of claim 21, wherein the third bag is located within a fourth bag.
    [23] 23. The plug of any one of claims 1 to 22, wherein each of the bags is transparent. Mintech Pty Ltd Patent Attorneys for the Applicant/Nominated Person SPRUSON & FERGUSON
    类似技术:
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    同族专利:
    公开号 | 公开日
    AU2013222055B2|2016-12-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO2020077419A1|2018-10-19|2020-04-23|Mti Group Pty Ltd|Inflatable down hole bag with inflation reagent release|CA1269321A|1986-05-27|1990-05-22|Specialised Polyurethane Applications Pty. Ltd.|Borehole plug and method|
    US5497829A|1993-11-17|1996-03-12|Foam Concepts, Inc.|Expansion foam borehole plug and method|
    AU4245499A|1998-08-06|2000-03-02|Jadefoil Investments Pty Ltd|Plug assembly for borehole|
    AU1111301A|2000-01-12|2001-07-19|De Luis, M|An inflatable bore hole plug having a delay means|
    US6619387B2|2001-09-12|2003-09-16|Stemlock, Incorporated|Inflatable gas bag for use as a borehole plug|
    法律状态:
    2017-03-30| FGA| Letters patent sealed or granted (standard patent)|
    优先权:
    申请号 | 申请日 | 专利标题
    AU2012903988A|AU2012903988A0||2012-09-12|A bore hole plug|
    AU2012903988||2012-09-12||
    AU2013222055A|AU2013222055B2|2012-09-12|2013-09-03|A bore hole plug|AU2013222055A| AU2013222055B2|2012-09-12|2013-09-03|A bore hole plug|
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