4. E - Fixed Constructions
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Drill pipe pull-up mechanism

E - Fixed Constructions – 21 – B
Patent

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Drill pipe screen

E - Fixed Constructions – 21 – B
Patent

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Drill pipe screen

E - Fixed Constructions – 21 – B
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Drill pipe tester and safety valve

E - Fixed Constructions – 21 – B
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Drill pipe tubing and casing protectors

E - Fixed Constructions – 21 – B
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Drill pipe wear belt assembly

E - Fixed Constructions – 21 – B
Patent

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Drill pipe wiper assembly

E - Fixed Constructions – 21 – B
Patent

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Drill pipe with helical ridge for highly angulated wellbore

E - Fixed Constructions – 21 – B
Patent

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Drill pipe with threaded extensions

E - Fixed Constructions – 21 – B
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Drill pipe/casing protector

E - Fixed Constructions – 21 – B
Patent

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Drill pipe/casing protector assembly

E - Fixed Constructions – 21 – B
Patent

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Drill pipes and casings utilizing multi-conduit tabulars

E - Fixed Constructions – 21 – B
Patent

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Drill pipes and casings utilizing multi-conduit tubulars

E - Fixed Constructions – 21 – B
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Drill pipes and casings utilizing multi-conduit tubulars

E - Fixed Constructions – 21 – B
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Drill pipes feeding apparatus

E - Fixed Constructions – 21 – B
Patent

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Drill pipes for rotary-vibratory drills

E - Fixed Constructions – 21 – B
Patent

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Drill protective device

E - Fixed Constructions – 21 – B
Patent

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Drill rig

E - Fixed Constructions – 21 – B
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Drill rig

E - Fixed Constructions – 21 – B
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Drill rig

E - Fixed Constructions – 21 – B
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