发明名称 |
Gas lift valve with central body venturi |
摘要 |
The present invention relates to a gas lift valve for use in an oil well producing by means of gas lift, said gas lift valve making use of a central body venturi for both controlling the flow of the injection gas from the annulus between the tubing and the casing of the oil well, and precluding a reverse flow of fluids from said oil well towards said annulus to occur.
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申请公布号 |
US6568473(B2) |
申请公布日期 |
2003.05.27 |
申请号 |
US20020050584 |
申请日期 |
2002.01.18 |
申请人 |
PETROLEO BRASILEIRO S.A. -PETROBRAS |
发明人 |
DE ALMEIDA ALCINO RESENDE |
分类号 |
E21B34/06;E21B34/10;E21B43/12;E21B43/16;F04F;F04F1/20;F16K15/02;(IPC1-7):E21B34/10 |
主分类号 |
E21B34/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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