DRILL PIPE TOOL JOINT AND CORRESPONDING DRILL PIPE

A drill pipe tool joint comprising: a pin including a male threaded portion at an outer surface; and a box including a female threaded portion at an inner surface, the female threaded portion to be screwed and fastened to the male threaded portion in a contacting zone consisting of a male threaded c...

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Bibliographic Details
Main Authors NARIKAWA, TOMOYUKI, ONO, TATSUO, YOSHIDA, MOTOHISA, KUWANO, TAKESHI, KOBAYASHI, NOBUO, SAKURA, KOJI, FUKUI, TOSHIHIKO, SATO, NOBUHIDE
Format Patent
LanguageDanish
English
Published 20.07.2015
Subjects
APPARATUS THEREFOR
CHEMISTRY
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
FIXED CONSTRUCTIONS
METALLURGY
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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Summary:A drill pipe tool joint comprising: a pin including a male threaded portion at an outer surface; and a box including a female threaded portion at an inner surface, the female threaded portion to be screwed and fastened to the male threaded portion in a contacting zone consisting of a male threaded contacting surface and a female threaded contacting surface, wherein at least a portion of the male threaded contacting surface or a portion of the female threaded contacting surface is a surface layer consisting of a hard metal and respectively at least a portion of the female threaded contacting surface or a portion of the male threaded contacting surface is a surface layer consisting of a soft material and where said both surface portions are contacting surfaces after screwing
Bibliography:Application Number: DKPA201570442