DE2302461
The invention relates generally to the control of sub-surface oil tools. A fail-safe operator for such tools is characterized as hydraulically operated and adapted to be connected in a system wherein hydraulic fluid is not wasted to the sea, in order to obviate contamination problems.
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | The invention relates generally to the control of sub-surface oil tools. A fail-safe operator for such tools is characterized as hydraulically operated and adapted to be connected in a system wherein hydraulic fluid is not wasted to the sea, in order to obviate contamination problems. |
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