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WO1997048967A1 - Outil pour la pose d'une cartouche explosive sous la surface du sol - Google Patents

Outil pour la pose d'une cartouche explosive sous la surface du sol Download PDF

Info

Publication number
WO1997048967A1
WO1997048967A1 PCT/GB1997/001625 GB9701625W WO9748967A1 WO 1997048967 A1 WO1997048967 A1 WO 1997048967A1 GB 9701625 W GB9701625 W GB 9701625W WO 9748967 A1 WO9748967 A1 WO 9748967A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
explosive charge
ground
chamber
spool
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.)
Ceased
Application number
PCT/GB1997/001625
Other languages
English (en)
Inventor
Andrew William Stevens
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.)
Geco Prakla International Resources Inc
Original Assignee
Geco Prakla International Resources Inc
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 Geco Prakla International Resources Inc filed Critical Geco Prakla International Resources Inc
Priority to AU31015/97A priority Critical patent/AU3101597A/en
Publication of WO1997048967A1 publication Critical patent/WO1997048967A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D3/00—Particular applications of blasting techniques
    • F42D3/06—Particular applications of blasting techniques for seismic purposes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/02—Generating seismic energy
    • G01V1/104—Generating seismic energy using explosive charges

Definitions

  • the present invention relates to a tool for positioning an explosive charge at
  • the tool is particularly useful in seismic surveying as a means for positioning an explosive charge.
  • Seismic surveying involves the use of an explosive charge buried at depth and of one or more hydrophones located some distance away from the charge. When the charge is detonated, the resulting sound waves travel at different speeds through different l o media. Careful selection of the relative position of a charge and one or more hydrophones can allow the user to calculate, from information provided by the hydrophone, the speed of sound through the particular medium under investigation. The user maybe able to draw conclusions from this information, such as the presence or absence of oil deposits in the area.
  • the charge may be lowered into the borehole together with a detonator attached to a detonation wire, either through the drilling pipe into the media below, or after withdrawal of the drilling or flushing tool.
  • the ground penetration tip of the shaft is pointed on its outer surface to facilitate its motion through the ground and has a generally cylindrical body which serves as a chamber for receiving and securing an end portion of the explosive charge to be planted.
  • the cylindrical body of the tip is seated in the shaft sufficiently securely such that the tip is not dislodged from the shaft during the ramming process.
  • the outer surface of the tip extends from its apex across the end of the shaft. In this way, the tip remains connected to the shaft as the downward bore is made but becomes dislodged from the shaft when the shaft is retracted. The explosive charge becomes dislodged also upon retraction of the shaft.
  • the detonation wire which must be in communication with the detonator connected to the explosive charge and also with a detonation point at the ground surface, must extend along the exterior of the shaft and must therefore come into contact with the ground through which the borehole is being made.
  • the ground material is abrasive and tends to rub against the detonation wire causing breakage thereof.
  • the high pressure reached at depth means that a significant abrasive force is exerted on the detonation wire. Accordingly, these prior art methods always suffer from the possibility that the detonation wire will be broken and the tool must therefore be retracted without detonation of the explosive charge. Not only is this inconvenient and expensive to rectify, it is also environmentally unacceptable to leave undetonated explosive charges buried in the ground. Accordingly, it is common to use back-up detonation wires.
  • a tool for burying an explosive charge comprising an elongate body for insertion into the ground, the body having attachment means on a proximal part thereof for attachment of the tool to a thrust means, mounting means for a spool for a detonation wire on an intermediate part thereof, and a chamber in a distal part thereof for receipt of an explosive charge and a detonator, the chamber having an opening at the distal end of the body, which opening is closable by a ground penetration tip adapted to be releasably secured to the distal end of the body and to receive and grip a distal portion of an explosive charge received within the chamber, the chamber having an opening in the region of the intermediate part of the tool for receipt of a detonation wire from the spool whereby, upon
  • the tool of the invention has a number of significant advantages over the prior art methods described above.
  • the detonation wire is coiled on the spool within the tool and is only uncoiled when the explosive charge has been laid and the tool is retracted from the ground. Accordingly, the detonation wire is not subject to the same risks of lightning strikes as is the case with prior art methods in which the detonation wire remains on the ground surface. Lightning strikes represent a very serious risk to workers laying explosive charges of the type used in seismic surveying. Lightning strikes can be particularly prevalent in certain geographical locations which are also fruitful ground for oil explorers.
  • a further advantage of a tool according to the invention is that the detonation wire connecting the detonator to a detonation point at the ground surface does not come into contact with the ground in which the explosive charge is being buried. Accordingly, the risk of detonation wire breakage or weakening due to abrasion against the ground is much reduced compared to the prior art.
  • the spool may be loaded into the chamber directly after its removal from the manufacturer's packing. Only a small amount (for example about 1 metre) of unwinding is needed in order to mount the spool inside the chamber and with the wire connected to the detonator.
  • Figure 1 is a side elevation of a part of the tool of the invention which shows the ground penetration tip secured to the explosive charge which, in turn, is connected to a detonator and detonation wire coiled on a spool;
  • Figure 2 shows a side elevation of the tool of the invention
  • Figure 3 shows a side elevation of the tool of the invention which has been partly cut away to reveal the interior detail thereof and in which the explosive charge is being withdrawn from the tool.
  • Explosive charge 1 which is mounted and gripped by ground penetration tip 2.
  • Explosive charge 1 may comprise any suitable commercially available explosive charge.
  • Powergel 3000, Dynoseis and Pentolite manufactured by Nobel Explosives may be used.
  • Other suitable explosives include To vex and Seismogelit.
  • explosive charge 1 is formed as a pair of explosive charge packages 3 and 4 which are cylindrical in shape and are screwed together as indicated at join 5
  • Ground penetration tip 2 is generally conical in shape but has wings 6 which allow tip 2 to be inserted into the ground but hinder any attempted retraction thereof. Therefore, wings 6 serve to anchor tip 2 in the ground once a desired depth has been reached.
  • Ground penetration tip 2 is disposable and is normally manufactured from a hard wearing plastics material such as high molecular weight polyethylene.
  • Disposable tip 2 has a generally cylindrical body portion 7 which is adapted to grip explosive charge 1.
  • explosive charge 1 can be secured to body portion 7 of tip 2.
  • a screw threaded portion on tip 2 may receive explosive charge 1 in a screw threaded engagement.
  • retention clips or the like may be used.
  • Explosive charge 1 is connected to a detonator 9 which is secured to explosive charge 1 by any suitable securing means such as a screw thread.
  • Detonator 9 is connected to detonation wire 10 which is coiled on a spool 1 1.
  • a funnel member 12 is provided between spool 11 and detonator 9 to assist in locating detonation wire 10 in its path between spool 11 and detonator 9.
  • One of the purposes of funnel 12, is to reduce the size of the opening from the spool chamber. This has the important advantage of preventing mud and gravel from being forced up into the spool chamber. At a typical depth of 20 metres, the pressure is sufficient to force any fluid medium, and its attendant hard/sharp objects into the tool through the open distal opening when the tool is withdrawn from the hole.
  • ground penetration tip 2 is shown mounted within the main elongate body 13 of tool 14. Ground penetration tip 2 is secured to body 13 by suitable releasable means such as a retention clip, or simply by a close fit arrangement.
  • Body 13 comprises a chamber 18 for receipt of explosive charge 1 and detonator 9.
  • Reference numeral 15 indicates a housing for spool 11.
  • Spool 11 has a rotatabie axle 16 mounted in housing 15.
  • tool 14 Whilst tool 14 has a main elongate body 13 which is generally formed from a length of tube or pipe, for example, of mild steel, tool 14 also has a shank 17 for connection to a thrust means.
  • the thrust means is not shown in the accompanying drawings but is of known construction and may comprise a ramming or pushing mechanism.
  • such a mechanism comprises a tube or pipe which is perhaps 75 feet in length, one end of which fits over shank 17 and is secured thereto by means of a bolt.
  • This tube or pipe may be provided with a racked portion, which racked portion is driven by a gear. Thrust may be applied as short, intermittent burst of power which cause shank 17, and hence tool 14, to vibrate whilst being urged downwardly into the ground.
  • This vibrating or ramming action is often convenient when burying an explosive charge in ground which is composed largely of loose sand, shale or similar media.
  • the vibrating motion of tool 14 serves to shake material loose from around its ground penetration tip 2 thus clearing a bore for passage of the tool into the ground.
  • the thrust means may simply utilise a pushing action. This may also be achieved using a gear in combination with the racked member on the pipe or tube. In this case, tool 14 is inserted into the ground smoothly with little or no vibrating motion. Power is applied to shank 17 not in short, intermittent bursts, but constantly so as to achieve a prolonged pushing action.
  • This type of thrust mechanism is particularly suitable when tool 14 is to be inserted in soft mud or a similar medium.
  • the thrust means may alternatively comprise the use of rubber wheels to push down a smooth pipe.
  • detonation wire 10 When tool 14 has been sufficiently withdrawn from the ground, detonation wire 10 can be released therefrom and attached to a detonation point. It is possible to dismantle spool 11 from housing 15 and then cut detonation wire 10. Alternatively, wire 10 may be cut in the region of the distal end of body 13 as it emerges therefrom. Depending on the hole depth and cap wire length, there may be spare wire on the roll. The usual technique is to cut the wire at the required length, then open the chamber and remove the remaining wire, still on the spool.
  • Tool 14 may then be re-used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

L'invention concerne un outil (14) pour l'enfouissement d'une charge explosive (1); il comprend un corps allongé (13) destiné à être inséré dans le sol, comportant, sur une partie proximale, un moyen de fixation (17) de l'outil à un dispositif de poussée, une bobine (11) pour un fil de détonation dans une partie intermédiaire, et une chambre (18) située dans une partie distale et destinée à loger une charge explosive (1), et un détonateur (9). La chambre (18) comporte une ouverture à l'extrémité distale du corps (13), ouverture pouvant être obstruée par une pointe (2) de pénétration du sol conçue pour être fixée de façon libérable à l'extrémité distale du corps (13) afin de loger et retenir une partie distale d'une charge explosive (1) logée dans la chambre (18). La chambre (18) comporte également une ouverture dans la partie intermédiaire de l'outil (14) pour loger un fil de détonation (10) provenant de la bobine (11); lorsqu'on enfonce l'outil (14), avec une charge explosive (1) à enfouir et un détonateur (9) logés dans la chambre (18), et un fil de détonation (10) enroulé autour de la bobine (11) et connecté au détonateur (9), dans le sol, en exercant une force de descente sur ledit outil (14) au moyen du dispositif de poussée, la pointe (2) de pénétration du sol pénètre le sol et l'outil (14) porte la charge explosive (1) à la profondeur souhaitée, de manière que lorsqu'on retire l'outil (14), la pointe (2) de pénétration du sol est déconnectée du corps (13) et retient la charge explosive (1), enlevant ainsi la charge explosive (1) de la chambre (18) à mesure que l'outil (14) est retiré et le fil de détonation (10) reste connecté au détonateur (9) et se déroule sur la bobine (11) à mesure qu'on retire l'outil (14).
PCT/GB1997/001625 1996-06-17 1997-06-17 Outil pour la pose d'une cartouche explosive sous la surface du sol Ceased WO1997048967A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU31015/97A AU3101597A (en) 1996-06-17 1997-06-17 Tool for placing an explosive cartridge under the soil surface

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9612633.9A GB9612633D0 (en) 1996-06-17 1996-06-17 Tool
GB9612633.9 1996-06-17

Publications (1)

Publication Number Publication Date
WO1997048967A1 true WO1997048967A1 (fr) 1997-12-24

Family

ID=10795419

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1997/001625 Ceased WO1997048967A1 (fr) 1996-06-17 1997-06-17 Outil pour la pose d'une cartouche explosive sous la surface du sol

Country Status (3)

Country Link
AU (1) AU3101597A (fr)
GB (1) GB9612633D0 (fr)
WO (1) WO1997048967A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000079212A1 (fr) * 1999-06-18 2000-12-28 Dynaenergetics Gmbh & Co. Kg Procede de pose et d'amorçage d'une charge explosive pour des explorations geologiques et dispositif explosif associe
WO2012131525A1 (fr) * 2011-03-31 2012-10-04 Ael Mining Services Limited Charge de trous de mine pour abattage à l'explosif
RU2484426C1 (ru) * 2012-03-22 2013-06-10 Открытое акционерное общество Новосибирский механический завод "Искра" Промежуточный детонатор для скважинных зарядов
CN107504873A (zh) * 2017-09-28 2017-12-22 安徽理工大学 一种处理深孔爆破药卷装药堵塞的办法及专用工具
CN109375254A (zh) * 2018-09-03 2019-02-22 山东大学 隧道地震波法超前地质预报中炮线与雷管线的连接装置及方法
CN109626202A (zh) * 2019-01-09 2019-04-16 江门市安恒爆破工程有限公司 乳化炸药药卷吊装勾
RU210855U1 (ru) * 2021-07-13 2022-05-11 Михаил Николаевич Оверченко Контейнер для фиксации и установки патронов-боевиков и промежуточных детонаторов во взрывных скважинах

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112904406A (zh) * 2021-01-27 2021-06-04 中石化石油工程技术服务有限公司 全程短路制作地震勘探药包的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1560038A (en) * 1925-02-02 1925-11-03 Frank W Camp Blasting process and means therefor
WO1992022727A1 (fr) * 1991-06-12 1992-12-23 Atlas Copco Berema Aktiebolag Procede et dispositif d'enfoncement de tuyaux dans le sol et cartouche utilisee a cet effet et pour creer une explosion ulterieure
US5343002A (en) * 1992-11-03 1994-08-30 Ernest J. Gremillion Disposable point with explosive charge for seismic exploration

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1560038A (en) * 1925-02-02 1925-11-03 Frank W Camp Blasting process and means therefor
WO1992022727A1 (fr) * 1991-06-12 1992-12-23 Atlas Copco Berema Aktiebolag Procede et dispositif d'enfoncement de tuyaux dans le sol et cartouche utilisee a cet effet et pour creer une explosion ulterieure
US5343002A (en) * 1992-11-03 1994-08-30 Ernest J. Gremillion Disposable point with explosive charge for seismic exploration

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000079212A1 (fr) * 1999-06-18 2000-12-28 Dynaenergetics Gmbh & Co. Kg Procede de pose et d'amorçage d'une charge explosive pour des explorations geologiques et dispositif explosif associe
US6520089B1 (en) * 1999-06-18 2003-02-18 Dynaenergetics Gmbh & Co. Kg Method for setting and igniting a charge of explosives for geological investigations and explosive device associated therewith
WO2012131525A1 (fr) * 2011-03-31 2012-10-04 Ael Mining Services Limited Charge de trous de mine pour abattage à l'explosif
RU2484426C1 (ru) * 2012-03-22 2013-06-10 Открытое акционерное общество Новосибирский механический завод "Искра" Промежуточный детонатор для скважинных зарядов
CN107504873A (zh) * 2017-09-28 2017-12-22 安徽理工大学 一种处理深孔爆破药卷装药堵塞的办法及专用工具
CN109375254A (zh) * 2018-09-03 2019-02-22 山东大学 隧道地震波法超前地质预报中炮线与雷管线的连接装置及方法
CN109375254B (zh) * 2018-09-03 2019-12-24 山东大学 隧道超前预报地震波法中炮线与雷管线的连接装置及方法
CN109626202A (zh) * 2019-01-09 2019-04-16 江门市安恒爆破工程有限公司 乳化炸药药卷吊装勾
RU210855U1 (ru) * 2021-07-13 2022-05-11 Михаил Николаевич Оверченко Контейнер для фиксации и установки патронов-боевиков и промежуточных детонаторов во взрывных скважинах

Also Published As

Publication number Publication date
GB9612633D0 (en) 1996-08-21
AU3101597A (en) 1998-01-07

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