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Preparation of highly basic alkylphenates and sulfurized...

E - Fixed Constructions – 21 – B
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Preparation of magnetic particles by reacting iron, cobalt,...

E - Fixed Constructions – 21 – D
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Preparation of magnetic particles by reacting iron, cobalt,...

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Preparation of viscous aqueous liquids for wellbore injection

E - Fixed Constructions – 21 – B
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Preparation process for an injectable, gelifiable mixture in...

E - Fixed Constructions – 21 – B
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Preperforated coiled tubing

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Preserving agent

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Presse-etoupe d'etancheite

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Pressure activated annular seal assembly

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Pressure activated locking slot assembly

E - Fixed Constructions – 21 – B
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Pressure activated release member for an expandable drillbit

E - Fixed Constructions – 21 – B
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Pressure activated release member for an expandable drillbit

E - Fixed Constructions – 21 – B
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Pressure activated switch valve

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Pressure activated well perforating technique

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Pressure actuable downhole tool and method for actuating the...

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Pressure actuated cleaning tool

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Pressure actuated downhole tool

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Pressure actuated safety switch for oil well perforating

E - Fixed Constructions – 21 – B
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Pressure actuated tubing safety valve

E - Fixed Constructions – 21 – B
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Pressure actuated vent assembly for slanted wellbores

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