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WO1996015350B1 - Systeme de guidage a fil unique destine a des forages - Google Patents

Systeme de guidage a fil unique destine a des forages

Info

Publication number
WO1996015350B1
WO1996015350B1 PCT/US1995/013479 US9513479W WO9615350B1 WO 1996015350 B1 WO1996015350 B1 WO 1996015350B1 US 9513479 W US9513479 W US 9513479W WO 9615350 B1 WO9615350 B1 WO 9615350B1
Authority
WO
WIPO (PCT)
Prior art keywords
guidewire
earth
borehole
magnetic field
path
Prior art date
Application number
PCT/US1995/013479
Other languages
English (en)
Other versions
WO1996015350A1 (fr
Filing date
Publication date
Priority claimed from US08/341,880 external-priority patent/US5515931A/en
Application filed filed Critical
Priority to DE69529762T priority Critical patent/DE69529762T2/de
Priority to CA002203402A priority patent/CA2203402C/fr
Priority to EP95940526A priority patent/EP0792407B1/fr
Publication of WO1996015350A1 publication Critical patent/WO1996015350A1/fr
Publication of WO1996015350B1 publication Critical patent/WO1996015350B1/fr

Links

Abstract

Un système à fil de guidage unique est destiné au forage en continu de trous de forage orientés et comporte un fil-guide déployé de façon pratiquement parallèle au trajet souhaité pour le trou de forage (14). Le fil-guide (20) est relié, à une première extrémité, à un côté d'une source réversible de courant continu (30), et à une deuxième extrémité (22), à la terre (24). Un deuxième côté de la source c.c est aussi connecté à la terre (32). Un flux de courant connu circulant dans une première direction au cours d'un premier intervalle, et dans une deuxième direction au cours d'un deuxième intervalle, produit des champs magnétiques statiques correspondants dans la zone du trou de forage (14). On mesure les composantes vectorielles des champs dans le trou de forage à l'aide d'un magnétomètre tri-axial, on annule les effets du champ magnétique terrestre à partir de ces composantes, puis on détermine la distance et la direction relatives du trou de forage et du fil-guide. Ces valeurs permettent de commander le forage ultérieur du trou le long d'un trajet souhaité.
PCT/US1995/013479 1994-11-15 1995-11-08 Systeme de guidage a fil unique destine a des forages WO1996015350A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69529762T DE69529762T2 (de) 1994-11-15 1995-11-08 Eindrahtzielführungssystem zum bohren von bohrlöchern
CA002203402A CA2203402C (fr) 1994-11-15 1995-11-08 Systeme de guidage a fil unique destine a des forages
EP95940526A EP0792407B1 (fr) 1994-11-15 1995-11-08 Systeme de guidage a fil unique destine a des forages

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/341,880 1994-11-15
US08/341,880 US5515931A (en) 1994-11-15 1994-11-15 Single-wire guidance system for drilling boreholes

Publications (2)

Publication Number Publication Date
WO1996015350A1 WO1996015350A1 (fr) 1996-05-23
WO1996015350B1 true WO1996015350B1 (fr) 1996-07-25

Family

ID=23339411

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/013479 WO1996015350A1 (fr) 1994-11-15 1995-11-08 Systeme de guidage a fil unique destine a des forages

Country Status (5)

Country Link
US (2) US5515931A (fr)
EP (1) EP0792407B1 (fr)
CA (1) CA2203402C (fr)
DE (1) DE69529762T2 (fr)
WO (1) WO1996015350A1 (fr)

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