LandOfFree - US Patents - Listing for Boring or penetrating the earth,With means movable relative to tool or shaft to control...

Boring or penetrating the earth – With means movable relative to tool or shaft to control... – Valve prevents upward flow

One pass drilling and completion of extended reach lateral...

Boring or penetrating the earth – With means movable relative to tool or shaft to control... – Valve prevents upward flow

One pass drilling and completion of wellbores with drill bit att

Boring or penetrating the earth – With means movable relative to tool or shaft to control... – Valve prevents upward flow

One-way drill string clutch

Boring or penetrating the earth – With means movable relative to tool or shaft to control...

Overflow valve of drill string

Boring or penetrating the earth – With means movable relative to tool or shaft to control...

Purging means for purging upwards in ring spacing between drill

Boring or penetrating the earth – With means movable relative to tool or shaft to control... – Valve prevents upward flow

Reverse circulation bit apparatus

Boring or penetrating the earth – With means movable relative to tool or shaft to control... – Valve prevents upward flow

Reverse circulation directional and horizontal drilling...

Boring or penetrating the earth – With means movable relative to tool or shaft to control...

Rotary valve for a jack hammer

Boring or penetrating the earth – With means movable relative to tool or shaft to control...

Rotary valve for a jack hammer

Boring or penetrating the earth – With means movable relative to tool or shaft to control...

Special circulation sub

Boring or penetrating the earth – With means movable relative to tool or shaft to control...

Surface controlled by-pass valve

Boring or penetrating the earth – With means movable relative to tool or shaft to control...

Tool for crushing coke

Boring or penetrating the earth – With means movable relative to tool or shaft to control...

Tool for crushing coke

Boring or penetrating the earth – With means movable relative to tool or shaft to control... – Valve prevents upward flow

Water separator and backflow valve