LandOfFree - US Patents - Listing for Boring or penetrating the earth,Below-ground impact members,With releasable means to detachably retain telescoping...

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Derrick mounted apparatus for the manipulation of pipe

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Device for handling and racking riser pipes and drill pipes

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Double acting mechanical jar

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Drill bit stabilizer device

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Reexamination Certificate

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Drill string jar apparatus

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Drill string shock absorber

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Drill string shock sub

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Drilling jar

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Drilling jar

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Drilling jar latch

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Drilling rigs

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Drilling rigs

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Drilling shock sub

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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Dual spring drill string shock absorber

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...

Patent

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