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"eze plug" drilled hole plugging device

E - Fixed Constructions – 21 – B
Patent

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"twin-impact" double-blow drilling apparatus

E - Fixed Constructions – 21 – B
Patent

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.alpha. olefin sulfonate surfactant additives for gas foam...

E - Fixed Constructions – 21 – B
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2-stage underreamer

E - Fixed Constructions – 21 – B
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4-d probe for making geophysical measurements

E - Fixed Constructions – 21 – B
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A bit retention device for a bit and chuck assembly of a...

E - Fixed Constructions – 21 – B
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A boring head and a roller cutter and a saddle for a boring...

E - Fixed Constructions – 21 – B
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A bottom-hole assembly, and a method and system for...

E - Fixed Constructions – 21 – B
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A bridge plug for use in a wellbore

E - Fixed Constructions – 21 – B
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A cable duct device in a swelling packer

E - Fixed Constructions – 21 – B
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A casing and method of installing the casing in a well

E - Fixed Constructions – 21 – B
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A casing transition nipple and method of casing a well to...

E - Fixed Constructions – 21 – B
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A cementing composition including a dispersant agent for...

E - Fixed Constructions – 21 – B
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A centralizer for tubular elements manufactured from two...

E - Fixed Constructions – 21 – B
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A circulating sub apparatus

E - Fixed Constructions – 21 – B
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A circulating sub apparatus and method

E - Fixed Constructions – 21 – B
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A clearance method and device for the oil pumping unit...

E - Fixed Constructions – 21 – B
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A closed oil liquid ring gas compression system with a...

E - Fixed Constructions – 21 – B
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A collecting device and a method of using same

E - Fixed Constructions – 21 – B
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A collection device and method of using same

E - Fixed Constructions – 21 – B
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