Jet bit with onboard deviation means
This patent describes a directional drill bit utilizing pressurized fluid as a means for eroding earth in a forward path of said bit. It comprises: an elongate hollow body having a first proximal end and a first distal end, and having at least a rigid first section and at least a rigid second section. The first section and said second section being connected one to the other by a flexible joint positioned intermediately of said first section and said second section, with the combination of said first section, said flexible joint and said second section providing a conduit having lead-free annular sidewalls. The said combination thereby defining said elongate hollow body; a connecting means formed by said first proximal end for joining said elongated hollow body with an appropriate fluid conveyance means used to transport said pressurized fluid; a nozzle means borne by said first distal end. The nozzle means comprising a nozzle plate having at least one jet nozzle attached to and carried by said nozzle plate; and an articulation means. The articulation means being responsive to changes in fluid pressure and permitting a forward portion of said bit bearing said nozzle structure to change angular position with respect to an aft portion of the bit.
- Assignee:
- NOV; EDB-90-099898; NOV-90-015133
- Patent Number(s):
- US 4899835; A
- Application Number:
- PPN: US 7-348910A
- OSTI ID:
- 6821566
- Country of Publication:
- United States
- Language:
- English
Similar Records
Drill bit and drill assembly
Enhanced circulation drill bit