Method for forming a window in a tubular and apparatus for use in said method

Method for forming a window in a tubular and apparatus for use in said method

A mill (400) is provided for milling an opening in a tubular, comprising a body (402) having an upper end connectable to a drill string, a lower end provided with milling and/or cutting material, a first fluid flow bore (406) extending generally axially of the body, a second fluid flow bore extendin...

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Hauptverfasser: HALFORD, HUBERT, EUGENE, LANGFORD, DALE, ELLIOTT, BLIZZARD, WILLIAM, ALLEN, JR
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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creator HALFORD, HUBERT, EUGENE
LANGFORD, DALE, ELLIOTT
BLIZZARD, WILLIAM, ALLEN, JR
description A mill (400) is provided for milling an opening in a tubular, comprising a body (402) having an upper end connectable to a drill string, a lower end provided with milling and/or cutting material, a first fluid flow bore (406) extending generally axially of the body, a second fluid flow bore extending from the first fluid flow bore and opening in the exterior of the body (402) substantially on the rotational axis thereof, and a plurality of inclined fluid flow bores (416) extending from the first fluid flow bore (406) and opening in the exterior of the body around the second fluid flow bore. The second fluid flow bore is lined with a layer of milling and/or cutting material (414).
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subjects EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
title Method for forming a window in a tubular and apparatus for use in said method
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