EP 2573315 A2 20130327 - Centralizer
Title (en)
Centralizer
Title (de)
Zentralisiervorrichtung
Title (fr)
Centreur
Publication
Application
Priority
GB 201116236 A 20110920
Abstract (en)
This invention relates to centralizers for use in maintaining a tubular member such a conductor or string in a substantially co-axial arrangement within a bore, for example a platform guide or an outer tubular member or conductor. In particular, this invention relates to a centralizer for use in an oil or gas-drilling or production installation. A centralizer (1) for centralising a tubular member (5) within a bore (7) comprises a main body (2) connectable around a tubular member to be centralised, the main body defining a longitudinal axis (4) of the centralizer, and a plurality of longitudinally extending abutments (18) spaced apart around the main body (2) that extend radially outwards from the main body to abut the bore. At least one of the abutments has an adjustment mechanism (3, 34, 36, 42) for making a radially adjustable abutting contact with the bore. This mechanism comprises a radially movable outer blade (34), a longitudinally movable wedging member (36) located between the outer blade and the main body (2) for moving the blade radially into the abutting contact, at least one guiding mount (3) for guiding the radial movement of the blade, and at least one longitudinally extending ramp surface (42) that is inclined with respect to the axis (4). The outer blade (34) is constrained to move in a substantially radial direction by the at least one guiding mount. The wedging member (36) is constrained between the outer blade and the main body (2) to move in a substantially longitudinal direction, The wedging member and the at least one ramp surface are configured to engage with one another such that as the wedging member moves longitudinally, the wedging member causes the outer blade to move radially. The arrangement of the wedging member and the outer blade is such that when the longitudinal axis (4) is substantially vertical, the weight of the wedging member (36) automatically causes the wedging member to drop, thereby moving the outer blade (34) in the radially outwards direction.
IPC 8 full level
E21B 17/10 (2006.01)
CPC (source: EP GB)
E21B 17/1014 (2013.01 - EP GB); E21B 17/1078 (2013.01 - GB); E21B 17/12 (2013.01 - GB)
Citation (applicant)
GB 2381280 A 20030430 - UWG LTD [GB]
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)
EP 2573315 A2 20130327; EP 2573315 A3 20151118; EP 2573315 B1 20181107; AU 2012227158 A1 20130404; DK 2573315 T3 20190128; GB 201116236 D0 20111102; GB 201216828 D0 20121107; GB 201216831 D0 20121107; GB 2494991 A 20130327; GB 2494991 B 20151209; GB 2494994 A 20130327
DOCDB simple family (application)
EP 12185143 A 20120920; AU 2012227158 A 20120918; DK 12185143 T 20120920; GB 201116236 A 20110920; GB 201216828 A 20120920; GB 201216831 A 20120920