EP 4172460 A1 20230503 - ACTUATOR AND ASSOCIATED METHODS
Title (en)
ACTUATOR AND ASSOCIATED METHODS
Title (de)
AKTUATOR UND ZUGEHÖRIGE VERFAHREN
Title (fr)
ACTIONNEUR ET PROCÉDÉS ASSOCIÉS
Publication
Application
Priority
- GB 202009950 A 20200630
- EP 2021067922 W 20210629
Abstract (en)
[origin: GB2596540A] Actuator 110 for providing a subsea electrical valve 116 actuation has a screw assembly 118 with a screw, 120 e.g. a ball screw, in bearings 142 and a threaded part, 122 e.g. a roller nut, one of which is connected to operate the valve. |Axial stop 126 prevents axial movement relative to the housing of the screw the nut in a normal mode of operation on screw or nut rotation by a primary drive, converting rotational movement to axial valve member movement relative to the housing. An override is provided, operating the actuator in an override mode. The override releasing at least one of the screw, e.g. the axial stop, and the threaded part for axial movement relative to the housing in the override mode. An override tool 190 applies force, from e.g. an ROV, via arms 192a,b, to release sleeve 152 to break a shear pin 154 and allow the sleeve to move, releasing balls 156 to a cavity in the sleeve and releasing a ring retainer 158 for the axial stop. The screw assembly is no longer prevented from axial movement as a unit. In the event of a roller screw failure the valve may be operated.
IPC 8 full level
E21B 34/06 (2006.01); E21B 41/00 (2006.01)
CPC (source: EP GB)
E21B 34/066 (2013.01 - EP GB); E21B 41/00 (2013.01 - GB); E21B 41/0007 (2013.01 - EP)
Citation (search report)
See references of WO 2022002981A1
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
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
GB 202009950 D0 20200812; GB 2596540 A 20220105; GB 2596540 B 20230201; BR 112022026143 A2 20230117; EP 4172460 A1 20230503; WO 2022002981 A1 20220106
DOCDB simple family (application)
GB 202009950 A 20200630; BR 112022026143 A 20210629; EP 2021067922 W 20210629; EP 21737454 A 20210629