LandOfFree - US Patents - Listing for Boring or penetrating the earth,With above-ground means for handling drilling fluid or cutting

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With tool shaft having plural passages for drilling fluid

Hydraulic device for forming a cavity in a borehole

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With tool shaft having plural passages for drilling fluid

Locking a sample tube in a downhole hammer

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid or cuttings directing or receiving means engaging bore...

Method and apparatus for enclosing an oil drilling rig

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting

Method and apparatus for processing and injecting drill...

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With tool shaft having plural passages for drilling fluid

Method for improving drill cuttings transport from a wellbore

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With tool shaft having plural passages for drilling fluid

Microtunnelling system and apparatus

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid or cuttings directing or receiving means engaging bore...

Mud return line connector apparatus

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With valve

Mud saver valve

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With valve

Mud saver valve

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With valve

Mud saver valve

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With valve

Mud saver valve

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With valve

Mud saver valve with replaceable inner sleeve

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid spray

Mudline casing hanger

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With valve

Mudsaver valve with dual snap action

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With valve

Mudsaver valve with retrievable inner sleeve

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With tool shaft having plural passages for drilling fluid

Multi-walled drill string for exploration-sampling drilling syst

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid or cuttings directing or receiving means engaging bore...

Particulate material intercepting arrangement for a hand held to

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid head on tool shaft having lateral port and axial...

Pressure seal for pumping instruments through drill rod

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With suction pump inlet communicating with bore bottom

Pump for a reverse circulation rotary drilling rig