EP 3271631 A1 20180124 - DRILL PIPE WITH DOUBLE SHOULDER TOOL JOINTS
Title (en)
DRILL PIPE WITH DOUBLE SHOULDER TOOL JOINTS
Title (de)
BOHRGESTÄNGE MIT WERKZEUGVERBINDUNG MIT DOPPELTER SCHULTER
Title (fr)
TIGE DE FORAGE DOTÉE DE RACCORDS DE TIGE À DOUBLE ÉPAULEMENT
Publication
Application
Priority
JP 2015001527 W 20150318
Abstract (en)
[origin: WO2016147222A1] A drill pipe with double shoulder tool joints by which a stress concentration can be relaxed and provided with an excellent fatigue characteristic without largely changing a predetermined threaded portion shape is provided. A drill pipe (1) with a double shoulder tool joint includes a pin (3) including a male threaded portion (30) having a predetermined shape, and a box (2) including a female threaded portion (20) to be screwed with the male threaded portion (30), and a stabbing flank (41) of each of three or less consecutive proximal thread ridges on a larger-diameter side of the male threaded portion (30) and/or three or less consecutive proximal thread ridges on a smaller-diameter side of the female threaded portion (20) includes a round processed portion.
IPC 8 full level
F16L 15/04 (2006.01); E21B 17/02 (2006.01)
CPC (source: EP)
E21B 17/042 (2013.01)
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 2016147222 A1 20160922; CN 107429861 A 20171201; EP 3271631 A1 20180124; EP 3271631 A4 20181024; JP 2018509573 A 20180405; JP 6528292 B2 20190612
DOCDB simple family (application)
JP 2015001527 W 20150318; CN 201580077942 A 20150318; EP 15885322 A 20150318; JP 2017546930 A 20150318