Hydraulic perforate non-drilling stage collar

Hydraulic perforate non-drilling stage collar

The utility model relates to a hydraulic perforate non-drilling stage collar, aiming to solve the problem that drilling stage collar and cement plugs is still required after a well is cemented. The utility model is characterized in that a cement infusing aperture (6) and a pressure transferring aper...

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Hauptverfasser: JIANG XINGFU, ZHANG XINWEN, NIU JIANMEI, ZHAI YAFENG, GUO JIANJUN, GUO XINCHAO, FENG XINWU
Format: Patent
Sprache:chi ; eng
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 JIANG XINGFU
ZHANG XINWEN
NIU JIANMEI
ZHAI YAFENG
GUO JIANJUN
GUO XINCHAO
FENG XINWU
description The utility model relates to a hydraulic perforate non-drilling stage collar, aiming to solve the problem that drilling stage collar and cement plugs is still required after a well is cemented. The utility model is characterized in that a cement infusing aperture (6) and a pressure transferring aperture (10) are arranged on the body, a liquid flowing aperture is arranged on a rubber plug sleeve (9) which is fixed on an aperture closing sleeve (4) by a shearing pin, the aperture closing sleeve (4) has uniform cross-section on upper and lower side, the bottom section of an aperture opening sleeve (7) is smaller than the upper section thereof, the pressure transferring aperture (10) on the body (2) communicates with a pressure releasing chamber (8), and the inner step surface of the upper inner circle of the rubber plug sleeve (9) is larger than the inner step surface of the lower inner circle thereof. The utility model has a simple structure, do not need to drill the internal structure of a stage collar and cem
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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 Hydraulic perforate non-drilling stage collar
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