EP0291925B1 - Bohrlochverschlussstopfen - Google Patents

Bohrlochverschlussstopfen Download PDF

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Publication number
EP0291925B1
EP0291925B1 EP88107872A EP88107872A EP0291925B1 EP 0291925 B1 EP0291925 B1 EP 0291925B1 EP 88107872 A EP88107872 A EP 88107872A EP 88107872 A EP88107872 A EP 88107872A EP 0291925 B1 EP0291925 B1 EP 0291925B1
Authority
EP
European Patent Office
Prior art keywords
head
closure
inlet
outlet
borehole
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.)
Expired - Lifetime
Application number
EP88107872A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0291925A1 (de
Inventor
Klaus Gerstenberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thermoplast & Apparatebau GmbH
Original Assignee
Thermoplast & Apparatebau GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Thermoplast & Apparatebau GmbH filed Critical Thermoplast & Apparatebau GmbH
Priority to AT88107872T priority Critical patent/ATE85400T1/de
Publication of EP0291925A1 publication Critical patent/EP0291925A1/de
Application granted granted Critical
Publication of EP0291925B1 publication Critical patent/EP0291925B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/127—Packers; Plugs with inflatable sleeve

Definitions

  • the invention relates to an expandable, lost closure plug for boreholes to be filled with liquid under pressure for rock solidification in underground mining with an elastic, tubular, derived from the liquid pressure automatically tensioning against the borehole wall, extending between an inlet and an outlet head, the rigid piece Surrounds spacer between the inlet and outlet head, wherein a flow channel for the liquid extends through the inlet and outlet head and continues in the spacer up to a mouth in the area between the closure piece and the spacer.
  • a borehole closure of this type is known from DE-C-30 14 834.
  • the spacer is tubular and thus represents a direct connection between the flow channels in the inlet and outlet heads.
  • the preloading the valve at the outlet head is greater than the preload of the valve at the inlet head, so that when the pressurized liquid flows into the spacer, the liquid flows through the orifices in the spacer also penetrates into the space between the spacer and the closure piece and a total pressure builds up in the interior of the closure plug before opening the valve on the outlet head, which spreads the closure piece and presses it firmly against the borehole wall.
  • the borehole closure is preferably made of plastic.
  • it In order to enable a secure jamming of the sealing plug, it must have a certain minimum length - also taking into account an irregular borehole surface.
  • the borehole closure must withstand a pressure of 60 to 90 bar.
  • the spacer is also exposed to a correspondingly high pressure load. It has now been shown in practice that, starting from the usual borehole diameters of approximately 42 to 44 mm and the required axial length of the borehole closure and the resulting ratio of diameter and length, a tubular spacer of sufficient strength as an inexpensive plastic injection-molded part can hardly be produced in terms of production technology is.
  • pumps are used in the pressing of plastic components as conveying means, which feed the individual components to the borehole closure in separate pump cylinders and separate lines in order to prevent a premature reaction.
  • a process-specific reaction for example of the components of polyurethane, is an intensive one Assuming mixing, an additional mixer must be installed upstream of the borehole plug.
  • the invention has for its object to design the sealing plug described in such a way that on the one hand the intensive mixing of the plastic components in the sealing plug itself can take place without additional cost, so that separate mixing devices to be arranged between the pumps and the sealing plug can be dispensed with, and the spacer as simple plastic injection molded part in a design that meets all requirements should be retained.
  • the liquid comprising the plastic components and pressed through the sealing plug into the borehole undergoes a multiple deflection.
  • Even the double deflection following the inlet head corresponds to the function of a conventional swirler.
  • the double redirection in front of the outlet head further intensifies the homogeneous mixing of the plastic components.
  • the plug thus also takes on the function of the otherwise usual mixing device and comes in the intensity of the mixing effect the usual Swirl immediately, without the sealing plug even having an additional component.
  • the spacer can be made solid over the major part of its length, so that the injection-molding problems during manufacture are eliminated and the spacer is able to withstand all loads that occur .
  • An expedient embodiment consists in that the channels in the spacer initially extend from its ends in its longitudinal direction and then merge into a mouth section angled with respect to this longitudinal direction, a further expedient embodiment consisting in that the mouth section each crosswise through one in the spacer whose longitudinal direction arranged opening is formed.
  • the borehole closure designated as a whole by 10, comprises an expandable closure piece 16, which is arranged between two valve heads, designated as inlet head 12 and outlet head 14, and which is designed as a high-pressure-resistant rubber hose, the diameter of which, when unloaded, is slightly smaller than the diameter of the borehole to be closed, the diameter of the borehole for example, can be 45 mm.
  • the two valve heads 12 and 14 consist essentially of basic bodies 18 and 20 which are rotationally symmetrical with respect to the hose axis and which are traversed by a central channel 22 and 24.
  • the base bodies 18 and 20 each have a tubular section 26 and 28 which is provided with an internal thread 30 and 32 and in which the end of a spacer provided with a corresponding external thread 34 and 36 38 is screwed in, which serves to hold the two valve heads 12 and 14 at a predetermined distance, in which the closure piece 16 is stretched so that it can be easily inserted into the borehole by means of a feed pipe or hose.
  • the end sections 44 and 46 of the closure piece 16 are drawn onto the outer surfaces 40 or 42 of the tubular sections 26 and 28, which are overlapped by clamping sleeves 48 and 50 formed on the base bodies 18 and 20.
  • the two valve heads 12 and 14 are designed differently with respect to the valve arrangement depending on the flow direction provided.
  • the foam material to be filled into the borehole must be pressed into the borehole through the borehole closure 10.
  • a filling line 52 is connected to the inlet head 12 adjacent to the mouth of the borehole.
  • the base body 18 is provided in its end section facing away from the closure piece 16 with an internal thread 54, on the inner end of which a shoulder 56 is formed which surrounds a valve opening 59.
  • a seal 58 is arranged on the shoulder 56.
  • a conical valve seat 60 is formed on the other side of the valve opening 59, to which a valve ball 62 is assigned, which is pressed against the valve seat 60 by a compression spring 64.
  • the compression spring 64 is supported on the end of the spacer 38 inserted into the base body 18.
  • a valve opening 66 is also provided on the outlet head 14, again on the downstream one On the side of this valve opening 66, now on the side facing away from the spacer 38, a valve seat 68 is formed, to which a valve ball 70 is assigned, which is pressed against the valve seat 68 by a compression spring 72.
  • the compression spring 72 is supported on a nipple 74 which is screwed into an internal thread 76 which is formed on the end section of the base body 20 which faces away from the closure piece 16.
  • the action of the spring 72 can be adjusted, the force of which is in any case greater than the force of the spring 64 in the inlet head 12, so that in the initial phase of the introduction of the pressurized foam, the closure piece 16 is first spread before the foam can escape into the borehole.
  • the nipple 74 is provided with a bore 78 for the passage of the foam material into the borehole.
  • the spacer 38 is at its two ends 80 and 82 each with a central channel 84 running in the longitudinal direction of the spacer 38 or 86, which extends within the spacer 38 in each case up to an aperture 88 or 90 which diametrically crosses the spacer.
  • These openings 88 and 90 represent the connection between the channels 80 and 82 and the annular space between the closure piece 16 and the spacer 38.
  • the spacer 38 In the area between the two openings 88 and 90, the spacer 38 preferably has a cross-shaped cross-sectional shape, which results in a material saving while maintaining the required rigidity.
  • the described borehole closure 10 has a simple and inexpensive design and can be handled very easily.
  • the borehole plug must be inserted into the borehole with the valve head 14 in front of it, whereupon the connecting line between the pumps and the borehole plug 10 must be connected and removed after the borehole has been filled.

Landscapes

  • 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)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
EP88107872A 1987-05-19 1988-05-17 Bohrlochverschlussstopfen Expired - Lifetime EP0291925B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107872T ATE85400T1 (de) 1987-05-19 1988-05-17 Bohrlochverschlussstopfen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873716783 DE3716783A1 (de) 1987-05-19 1987-05-19 Bohrlochverschlussstopfen
DE3716783 1987-05-19

Publications (2)

Publication Number Publication Date
EP0291925A1 EP0291925A1 (de) 1988-11-23
EP0291925B1 true EP0291925B1 (de) 1993-02-03

Family

ID=6327883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107872A Expired - Lifetime EP0291925B1 (de) 1987-05-19 1988-05-17 Bohrlochverschlussstopfen

Country Status (3)

Country Link
EP (1) EP0291925B1 (enrdf_load_stackoverflow)
AT (1) ATE85400T1 (enrdf_load_stackoverflow)
DE (2) DE3716783A1 (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102071962B (zh) * 2010-12-24 2012-10-24 中国矿业大学 一种下行孔封孔方法
CN103693620A (zh) * 2013-12-18 2014-04-02 常熟振氟新材料有限公司 从氯气与氯化氢混合气体中分离回收氯气的装置
CN109209476B (zh) * 2018-10-12 2021-07-20 中煤科工集团重庆研究院有限公司 导气增压装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171377B (de) * 1959-11-02 1964-06-04 Dipl Berging Albrecht Graefer Bohrtraenkverfahren und Bohrtraenkgeraet
DE2903137C3 (de) * 1979-01-27 1982-02-18 Bergwerksverband Gmbh, 4300 Essen Rohrförmiger verlorener Bohrlochverschluß
DE3014834C2 (de) * 1980-04-17 1985-09-12 Thermoplast & Apparatebau Gmbh, 6270 Idstein Bohrlochverschlußstopfen
DE3313852C1 (de) * 1983-04-16 1984-11-15 Diehl GmbH & Co, 8500 Nürnberg Aufweitbarer, verlorener Verschlußstopfen für Injektions-Bohrlöcher

Also Published As

Publication number Publication date
EP0291925A1 (de) 1988-11-23
DE3716783C2 (enrdf_load_stackoverflow) 1991-01-03
DE3878029D1 (de) 1993-03-18
ATE85400T1 (de) 1993-02-15
DE3716783A1 (de) 1988-12-15

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