4. Boring or penetrating the earth
  5. Automatic control

Sidney J. Green

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Active drill stabilizer assembly

Boring or penetrating the earth – Automatic control
Patent

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Failsafe hydraulic prestressing nut

Patent

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Forced refreezing method for the formation of high strength ice

Hydraulic and earth engineering – Marine structure or fabrication thereof – In or on frozen media
Patent

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High pressure rotary coupling

Pipe joints or couplings – With leakage or drip disposal – Weep holes
Patent

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Optimizing drilling performance using a selected drilling fluid

Boring or penetrating the earth – Automatic control
Reexamination Certificate

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Profile ID: LFUS-PAI-P-7640

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