4. Boring or penetrating the earth
  5. Processes
  6. Boring curved or redirected bores

David D. Hearn

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Apparatus for milling a window in well tubular

Wells – Means for guiding insertable element laterally of well axis
Patent

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Coupling for releasing tubing strings from downhole tools

Wells – Pistons – fluid driven into well – With stop
Patent

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Downhole setting tool

Wells – Packers or plugs – With expanding anchor
Reexamination Certificate

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Downhole tool for determining in-situ formation stress orientati

Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent

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Drainhold drilling

Boring or penetrating the earth – With above-ground means to advance or retract boring means
Patent

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Profile ID: LFUS-PAI-P-264979

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