EP 0002160 A1 19790530 - Device for drilling boreholes in the soil.
Title (en)
Device for drilling boreholes in the soil.
Title (de)
Vorrichtung zum Bohren von Löchern im Boden.
Title (fr)
Dispositif de forage de trous dans le sol.
Publication
Application
Priority
FR 7734849 A 19771121
Abstract (en)
[origin: ES475233A1] In apparatus for drilling a hole in the ground comprising tubing for shoring up the walls of the drilled hole and a drilling member comprising a pneumatic percussion hammer having an eccentric cutting edge, the drilling member extending in the tubing and having a working position in which the cutting edge extends below the lower end of the tubing and a removal position in which the cutting edge is within the tubing, the extension tube for supplying gas to the hammer is connected to the hammer by a helicoidal telescopic connection which is rotatable through 180 DEG between retracted and extended positions, a decentring spline being mounted on that part of the telescopic connection connected to the extension tube and arranged so that, in the retracted position of the telescopic connection, assumed when the drilling member is in its working position, the cutting edge is diametrically opposite the spline and, in the extended position of the telescopic connection, assumed when the drilling member is in its removal position, the cutting edge is aligned with the spline.
Abstract (fr)
Dispositif de forage constitué d'un organe de forage comportant un marteau (1) fonctionnant à l'air comprimé transmis au marteau par des tubes allonges (3) et équipé d'un taillant excentré (2), et d'un tubage extérieur (3). La liaison des tubes allonges (3) avec le marteau (1) est réalisée au moyen d'un raccord télescopique hélicoïdal (9) qui comporte un ergot de décentrage (10) sur la partie liée aux tubes allonges, la course télescopique correspondant à une rotation relative de 180° de telle sorte que, en position rétractée, la partie excentrée du taillant (12) soit diamètralement opposée à l'ergot (10), et, en position développée, la partie excentrée du taillant soit placée au-dessous de l'ergot. Application au forage de trou dans le sol, en particulier dans des terrains non consolidés.
IPC 1-7
IPC 8 full level
E21B 7/20 (2006.01); E21B 10/26 (2006.01); E21B 10/32 (2006.01); E21B 10/66 (2006.01)
CPC (source: EP US)
E21B 7/208 (2013.01 - EP US); E21B 10/265 (2020.05 - EP US); E21B 10/66 (2013.01 - EP US)
Citation (search report)
- FR 2115421 A1 19720707 - SANDVIKENS JERNVERKS AB [SE]
- FR 1287554 A 19620316
- US 1858926 A 19320517 - GRAU HERBERT E, et al
- GB 269922 A 19280209 - JAN FRANK
- [A] FR 1514485 A 19680223 - SKANSKA CEMENTGJUTERIET AB
- [A] FR 1452421 A 19660225 - CARRIERES ET ATELIERS STENUICK
- [A] US 1996132 A 19350402 - WALKER CLINTON L
Designated contracting state (EPC)
BE CH DE GB NL SE
DOCDB simple family (publication)
EP 0002160 A1 19790530; EP 0002160 B1 19800903; BR 7807599 A 19790724; CA 1098895 A 19810407; DE 2860155 D1 19801211; ES 475233 A1 19790401; FR 2409373 A1 19790615; FR 2409373 B1 19821029; IT 1109631 B 19851223; IT 7869659 A0 19781121; JP S54106001 A 19790820; JP S6151117 B2 19861107; US 4183415 A 19800115
DOCDB simple family (application)
EP 78400189 A 19781117; BR 7807599 A 19781120; CA 316585 A 19781121; DE 2860155 T 19781117; ES 475233 A 19781120; FR 7734849 A 19771121; IT 6965978 A 19781121; JP 14403078 A 19781121; US 96279278 A 19781120