EP 1830035 A1 20070905 - Method for determining the position of a movable device in an underground borehole
Title (en)
Method for determining the position of a movable device in an underground borehole
Title (de)
Verfahren zur Positionsdetektion von bewegten Objekten im Bohrloch
Title (fr)
Procédé pour déterminer la position d'un objet en mouvement dans un puits
Publication
Application
Priority
EP 06110542 A 20060301
Abstract (en)
A method for determining the position of a moveable device within an underground borehole which is filled with a fluid, the method comprising: - determining the travel time (At) of a signal transmitted through the fluid between the moveable device and a signal processing unit having a known location within or in the vicinity of the borehole, such as at the wellhead; - assessing the velocity of the signal (v) through the borehole fluid; and - determining the distance (d) between the moveable device and the signal processing unit by multiplying the measured travel time and the assessed velocity of the signal, (d=v.”t).
IPC 8 full level
E21B 47/09 (2012.01)
CPC (source: EP)
E21B 47/095 (2020.05)
Citation (search report)
- [XY] WO 2004074633 A1 20040902 - TNO [NL], et al
- [Y] US 2001013412 A1 20010816 - TUBEL PAULO [US]
- [YD] US 6241028 B1 20010605 - BIJLEVELD AARNOUD F [NL], et al
- [X] US 6401814 B1 20020611 - OWENS STEVEN C [US], et al
- [X] US 2003062155 A1 20030403 - SUMMERS JERRY L [US]
- [X] US 2002084071 A1 20020704 - MCCOY JAMES N [US], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
DOCDB simple family (application)
EP 06110542 A 20060301