EP 2564013 A2 20130306 - DRILLING OR EXTRACTION PIPE STRING
Title (en)
DRILLING OR EXTRACTION PIPE STRING
Title (de)
BOHR- ODER FÖRDERROHRGESTÄNGE
Title (fr)
TRINGLERIE DE TUBE DE FORAGE OU DE TRANSPORT
Publication
Application
Priority
- DE 102010018383 A 20100426
- EP 2011002078 W 20110426
Abstract (en)
[origin: WO2011134636A2] The invention relates to a pipe element (1) for a drilling or extraction pipe string (13), comprising an outer tube (2) of electrically conductive material and an electrical conductor which is led through the outer tube (2) and is electrically insulated from the outer tube (2), wherein the electrical conductor is an inner tube (3) of electrically conductive material, and wherein the inner tube (3) is arranged concentrically in relation to the outer tube (2). In order to provide a drilling or extraction pipe string (13) that allows electrical power to be supplied to electrically operated devices incorporated in the string (13) and/or data transmission between above ground and below ground, it is proposed by the invention that a hollow space (4) in the form of an annular gap is arranged between the inner tube (3) and the outer tube (2).
IPC 8 full level
E21B 17/18 (2006.01); E21B 17/02 (2006.01); E21B 27/02 (2006.01); E21B 47/01 (2012.01); F16L 1/00 (2006.01); F16L 25/01 (2006.01)
CPC (source: EP US)
E21B 17/003 (2013.01 - EP); E21B 17/0285 (2020.05 - EP US); E21B 27/02 (2013.01 - EP); E21B 47/013 (2020.05 - EP US); E21B 47/017 (2020.05 - EP); F16L 9/147 (2013.01 - EP); F16L 25/01 (2013.01 - EP)
Citation (search report)
See references of WO 2011134636A2
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DE 102010018383 A1 20111027; EP 2564013 A2 20130306; WO 2011134636 A2 20111103; WO 2011134636 A3 20130110
DOCDB simple family (application)
DE 102010018383 A 20100426; EP 11721422 A 20110426; EP 2011002078 W 20110426