发明名称 |
Aperfeiçoamento em sede de válvulas de orifício |
摘要 |
<p>Invention is of an improvement to seat of gate valves used for gas-lift producing oil wells, consisting of a seat lower part of which is curved there being a straight vertical art and a sloping straight lower part, central spacing consisting of a first part in the shape of a tapered nozzle at which gas is gradually speeded up, a second part which is the main restriction to flow, and a third part in the shape of a conical diffuser at which gas is gradually slowed down.</p> |
申请公布号 |
BR9300292(A) |
申请公布日期 |
1994.08.16 |
申请号 |
BR19939300292 |
申请日期 |
1993.01.27 |
申请人 |
PETROLEO BRASILEIRO S/A - PETROBRAS |
发明人 |
ALCINO RESENDE DE ALMEIDA |
分类号 |
E21B34/06;F04F1/20;(IPC1-7):E21B34/06 |
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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