1
Nic H W Smet: Method and device for making a hole in the ground. Stevens Davis Miller & Mosher, July 25, 1989: US04850440 (37 worldwide citation)

The head is carried by two flexible continuous drill pipes which surround each other and which are flexible enough to be uncoiled from a reel but which are still rigid enough almost not to get twisted in the ground on themselves or relative to each other during the operation of the head. The head is ...


2
Marc Smet: Device for making a hole in the ground. Foley & Lardner, January 12, 1993: US05178223 (15 worldwide citation)

A device for making a hole in the ground has a drilling head having a body. The drilling body includes a passage and a venturi through which rinsing fluid passes. The drilling head has a mechanism mounted on an end thereof for loosening the ground. A first pipe provides pressurized fluid to the mech ...


3
Marc J Smet: High pressure pipe and device for making a hole in the ground, provided with such high pressure pipe. Foley & Lardner, April 7, 1992: US05101918 (14 worldwide citation)

A high pressure pipe consisting of a flexible high pressure hose which is attached at both ends to a tube. The tube is stiffer than the high pressure hose in order to allow the high pressure hose to be pushed into the ground without bending or buckling and thereby forming a hole in the ground.


4
Nic H W Smet: Method and device for making a hole in the ground. Stevens Davis Miller & Mosher, May 1, 1990: US04921057 (12 worldwide citation)

The head is carried by two flexible continuous drill pipes which surround each other and which are flexible enought to be uncoiled from a reel but which are still rigid enough almost not to get twisted in the ground on themselves or relative to each other during the operation of the head. The head i ...


5
Smet Nik: Method and device for making a hole in the ground.. Smet Nik, February 24, 1988: EP0256601-A1 (6 worldwide citation)

The head (13,14) is carried by two flexible continuous drill pipes (4 and 5) which surround each other and which are flexible enough to be uncoiled from a reel but which are still rigid enough almost not to get twisted in the ground on themselves or relative to each other during the operation of the ...


6
Device for making a hole in the ground. Int Tech Handelsonderneming En, April 30, 1975: GB1392526-A (1 worldwide citation)

1392526 Boring earth &c INTERNATIONAAL TECHNISCHE HANDELSONDERNEMING EN ADVIESBUREAU ITHA NV 23 June 1972 [24 June 1971 3 Aug 1971] 29572/72 Heading E1F In apparatus for making a hole in the earth comprising a tube 1 to be driven into the earth to make the hole and a conduit 2 to supply fluid at pre ...


7
JENNE DIETMAR , STAUFFER ALEXANDER : [de] Bohrkopf und Vorrichtung zum Herstellen einer Bohrung im Erdreich, [en] DRILL HEAD AND DEVICE FOR MAKING A HOLE IN THE GROUND, [fr] TÊTE DE FORAGE ET DISPOSITIF DE PRODUCTION DUN FORAGE DANS LA TERRE. TERRA TIEFBAUTECHNIK , December 23, 2015: EP2957710-A1

[de] Die Erfindung betrifft einen Bohrkopf (10, 100) und eine Vorrichtung zum Herstellen einer Bohrung im Erdreich, wobei der Bohrkopf (10, 100) eine erste mit einem Innengestänge eines Doppelrohrgestänges koppelbare Einheit (24, 76) und eine zweite mit einem Aussengestänge des Doppelrohrgestänges k ...