EP 0772728 A1 19970514 - LOCOMOTIVE OR TRACTOR FOR PULLING EQUIPMENT IN A PIPE OR DRILL HOLE
Title (en)
LOCOMOTIVE OR TRACTOR FOR PULLING EQUIPMENT IN A PIPE OR DRILL HOLE
Title (de)
LOKOMOTIVE ODER TRAKTOR ZUM BEWEGEN VON GERÄTEN IN EINEM ROHR ODER BOHRLOCH
Title (fr)
LOCOTRACTEUR OU TRACTEUR POUR DEPLACER UN APPAREIL DANS UN TUYAU OU UN PUITS DE FORAGE
Publication
Application
Priority
- NO 9500034 W 19950214
- NO 940493 A 19940214
Abstract (en)
[origin: WO9521987A1] A locomotive or tractor (3) for pulling wire/cable-operated equipment such as measuring, logging and processing equipment in a borehole, pipe etc., comprising a long body with means of propulsion, including one or more motors for propelling the tractor. The means of propulsion consist of at least one set of rollers (13), which can be rotated and are axially inclined in relation to the tractor, with a rounded surface which has a number of sharp parts or edges; the set of rollers (13) are arranged in connection with a driven unit (8), which rotates externally in relation to the support structure (16) of the tractor and which is provided with means (14) which are designed to move the rollers in a radial direction and press them (13) against the wall of the borehole or pipe wall. The tractor is also provided with at least one set of control wheels (31), which are freely supported in relation to the tractor, which can be moved, by means of other means (32, 33), in a radial direction in relation to the tractor and which are designed to roll along the pipe wall or wall of the borehole and keep the tractor centrically oriented in relation to the pipe or borehole and prevent the tractor from rotating.
IPC 1-7
IPC 8 full level
E21B 4/00 (2006.01); E21B 4/18 (2006.01); E21B 23/00 (2006.01)
CPC (source: EP)
E21B 4/00 (2013.01); E21B 4/18 (2013.01); E21B 23/00 (2013.01); E21B 23/001 (2020.05)
Citation (search report)
See references of WO 9521987A1
Designated contracting state (EPC)
DE DK FR GB IT NL
DOCDB simple family (publication)
WO 9521987 A1 19950817; AU 1826195 A 19950829; EP 0772728 A1 19970514; NO 940493 D0 19940214
DOCDB simple family (application)
NO 9500034 W 19950214; AU 1826195 A 19950214; EP 95910021 A 19950214; NO 940493 A 19940214