EP 3280870 A1 20180214 - CONSTANT FORCE CENTRALIZER
Title (en)
CONSTANT FORCE CENTRALIZER
Title (de)
ZENTRIERVORRICHTUNG MIT KONSTANTER KRAFT
Title (fr)
CENTREUR À FORCE CONSTANTE
Publication
Application
Priority
- US 201562144657 P 20150408
- US 201514803023 A 20150717
- US 2016026733 W 20160408
Abstract (en)
[origin: WO2016164784A1] A constant force device has at least a first non-constant axial force driving the first set of arms and a second non-constant axial force driving the second set of arms, where the two sets of arms are offset from one another by 900. Each of the non-constant axial forces is converted to a radially extending force by the interaction of a force guide and actuator. The force guide is attached to the inner mandrel of the constant force device and is shaped to produce an essentially constant radially extending force through the entire range of motion of the arms. Typically each arm of the pair of arms has a pivoting arm and a telescoping arm where the joint between the pivoting arm and telescoping arm has one or more wheels to reduce friction as the constant force device moves through the tubular.
IPC 8 full level
E21B 17/10 (2006.01); E21B 17/00 (2006.01); E21B 17/12 (2006.01); E21B 19/24 (2006.01); E21B 47/08 (2012.01)
CPC (source: EP US)
E21B 17/1021 (2013.01 - EP US); E21B 17/1078 (2013.01 - EP US)
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)
WO 2016164784 A1 20161013; CA 2982165 A1 20161013; EP 3280870 A1 20180214; EP 3280870 A4 20181212; US 2016298396 A1 20161013
DOCDB simple family (application)
US 2016026733 W 20160408; CA 2982165 A 20160408; EP 16777399 A 20160408; US 201514803023 A 20150717