EP 3867485 A2 20210825 - DRILL STRING WITH A DOWNHOLE REAMER
Title (en)
DRILL STRING WITH A DOWNHOLE REAMER
Title (de)
BOHRGESTÄNGE MIT EINEM BOHRLOCHRÄUMER
Title (fr)
TRAIN DE TIGES
Publication
Application
Priority
- GB 201816969 A 20181018
- GB 201904424 A 20190329
- GB 2019052624 W 20190918
Abstract (en)
[origin: WO2020079393A2] A drill string for use in the directional drilling of wellbores is described. A downhole reamer apparatus (202) is mounted in a drill string incorporating a drilling motor (300), stabiliser (302) and drill bit (304) operable either by rotation of the drill string or activation of the drilling motor (300). The drill string is located in wellbore (306) at the end of drill pipe (310). If the operator wishes to drill upwardly, the reamer elements are locked in the retracted condition. This results in the reamer apparatus being under gauge which results in build angle (308) pointing the drill bit upwardly.
IPC 8 full level
E21B 10/32 (2006.01)
CPC (source: EP US)
E21B 10/32 (2013.01 - EP US); E21B 4/02 (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
DOCDB simple family (publication)
WO 2020079393 A2 20200423; WO 2020079393 A3 20200528; CA 3110768 A1 20200423; CN 112739884 A 20210430; EA 202191008 A1 20210831; EP 3867485 A2 20210825; GB 201816969 D0 20181205; GB 201904424 D0 20190515; MX 2021002593 A 20210512; US 2021310313 A1 20211007
DOCDB simple family (application)
GB 2019052624 W 20190918; CA 3110768 A 20190918; CN 201980055966 A 20190918; EA 202191008 A 20190918; EP 19778596 A 20190918; GB 201816969 A 20181018; GB 201904424 A 20190329; MX 2021002593 A 20190918; US 201917264704 A 20190918