PRELOAD AND CENTRALIZING DEVICE FOR MILLING SUBTERRANEAN BARRIER VALVES

PRELOAD AND CENTRALIZING DEVICE FOR MILLING SUBTERRANEAN BARRIER VALVES

A device is associated with a downhole tool to control the weight that can be set down on the tool while the tool is operating. A shroud is secured to the string that supports the tool with interior modular biasing components that for run in extend the tool past the shroud. Upon encountering a suppo...

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Hauptverfasser: VINCENT, BENNY J, COLEMAN, DAVID W
Format: Patent
Sprache:eng ; fre
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 VINCENT, BENNY J
COLEMAN, DAVID W
description A device is associated with a downhole tool to control the weight that can be set down on the tool while the tool is operating. A shroud is secured to the string that supports the tool with interior modular biasing components that for run in extend the tool past the shroud. Upon encountering a support for the tool, further set down weight compresses the biasing components for a predetermined stroke length delineated by the shroud landing on a support. If the tool is a mill, its operation takes place under the biasing force as the mill advances into the piece being cut or milled under a predetermined pressure. When the mill reaches full extension form the shroud the process can be repeated until the milling is complete. The shroud also centralizes the mill during milling.
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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 PRELOAD AND CENTRALIZING DEVICE FOR MILLING SUBTERRANEAN BARRIER VALVES
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