EP 3228807 B1 20190515 - COUNTER HOLD SYSTEM FOR A DRILLING SYSTEM
Title (en)
COUNTER HOLD SYSTEM FOR A DRILLING SYSTEM
Title (de)
GEGENHALTESYSTEM FÜR EIN BOHRSYSTEM
Title (fr)
SYSTÈME DE MAINTIEN DE COMPTEUR POUR UNE INSTALLATION DE FORAGE
Publication
Application
Priority
EP 16164117 A 20160406
Abstract (en)
[origin: EP3228807A1] The invention relates to a counter hold system (4) for a drilling system, comprising an axially and/or radially flexible, preferably tubular, bellows (401) with two annular openings, and a cylinder body (403) which is axially movable in a cylinder housing (405) with two ends, wherein the bellows (401) is connected at one annular opening to the outer surface of the cylinder body (403) or to the outer surface at one end of the cylinder housing (405), and on its other annular opening to the opposite end of the cylinder housing (405), so that an annular hollow space is formed between the inner surface of the bellows (401) and the outer surface of the cylinder housing (405), and means are provided to lead a pressurized medium into the bellows (401), preferably in the form of an inlet (408) in the cylinder housing (405) leading into the hollow space. The invention further relates to the use of such a counter hold system in a drilling system, and a drilling system with such a counter hold system.
IPC 8 full level
E21B 1/00 (2006.01); E21B 23/00 (2006.01); E21B 23/04 (2006.01)
CPC (source: EP US)
E21B 23/001 (2020.05 - EP); E21B 23/0411 (2020.05 - 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
DOCDB simple family (publication)
EP 3228807 A1 20171011; EP 3228807 B1 20190515; WO 2017174486 A1 20171012
DOCDB simple family (application)
EP 16164117 A 20160406; EP 2017057817 W 20170403