EP 4348003 A1 20240410 - A DOWNHOLE ASSEMBLY WITH SPRING ISOLATION FILTER
Title (en)
A DOWNHOLE ASSEMBLY WITH SPRING ISOLATION FILTER
Title (de)
BOHRLOCHANORDNUNG MIT FEDERISOLIERUNGSFILTER
Title (fr)
ENSEMBLE DE FOND DE TROU AVEC FILTRE D'ISOLATION DE RESSORT
Publication
Application
Priority
US 2021034569 W 20210527
Abstract (en)
[origin: WO2022250674A1] The present invention is directed to an apparatus for use on a structural member having a longitudinal axis, the structural member being configured to propagate stress wave energy in an operational state, the stress wave energy being characterized by an operational frequency spectrum. The apparatus has a housing assembly including a first end, a second end, and one or more protective enclosures configured to accommodate one or more devices. The housing assembly is configured to be rotationally registered to the structural member when coupled to the structural member, and is characterized by a predetermined housing mass. A spring arrangement is coupled between the structural member and the first end and/or coupled between the structural member and the second end in the operational state. The spring arrangement is characterized by a predetermined force-displacement relationship. The housing assembly and the spring arrangement form an isolation filter characterized by a predetermined spectral transfer function, the predetermined spectral transfer function being a function of the predetermined housing mass and the predetermined force-displacement relationship. The predetermined spectral transfer function includes a passband having frequencies that are substantially outside the operational frequency spectrum wherein the stress wave energy is substantially attenuated in the operational state so that the housing member is substantially isolated from the stress wave energy.
IPC 8 full level
E21B 47/01 (2012.01); E21B 47/017 (2012.01)
CPC (source: EP US)
E21B 47/01 (2013.01 - EP); E21B 47/0175 (2020.05 - EP); E21B 47/022 (2013.01 - US); E21B 47/16 (2013.01 - 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
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022250674 A1 20221201; AU 2021447431 A1 20231102; CA 3216821 A1 20221201; EP 4348003 A1 20240410; US 2024117733 A1 20240411; ZA 202309589 B 20240530
DOCDB simple family (application)
US 2021034569 W 20210527; AU 2021447431 A 20210527; CA 3216821 A 20210527; EP 21737236 A 20210527; US 202118554684 A 20210527; ZA 202309589 A 20231013