Back to results
US 2006/0131077 A1Published application
Directional drill head
AssigneeTT Technologies, Inc.
InventorMichael Tjader
Life of this patent
Estimating the term…
Abstract
A drill head is shown that provides improved steering in difficult ground conditions such as dry and compacted soil. A drill head is shown with features that include a narrow front portion, a sharp hardened insert such as a carbide point, and a curved rear portion of the drill head. Angled porting of liquid is included in selected configurations to enhance steering of the drill head. Porting of liquid within a recess portion also enhances steering of the drill head.
Claims20
A drill head, comprising:
- a number of hardened inserts secured to a drill head body including an edge insert pointing forward from a front portion of the drill head body;
- a laterally tapered front portion of the drill head body;
- a substantially vertically flat front portion of the drill head body;
- and
- a rear portion of the drill head body that curves away from the substantially vertically flat front portion.
2 more elements
A drill head, comprising:
- a drill head body, including a top portion, a bottom portion, side portions, and a leading edge, the leading edge being located adjacent to the bottom portion, the drill head body including:
- a taper from the leading edge outward to the side portions;
- a flat portion, adjacent to the leading edge and substantially parallel to the bottom portion of the drill head body;
- a steering surface that transitions between the flat portion and the top portion of the drill head body;
- and
- a number of hardened inserts secured to the drill head body including an elongated insert with an edge pointing forward from the leading edge of the drill head body.
3 more elements
A drill head, comprising:
- a leading edge located at a bottom portion of the drill head;
- a steering surface extending from the leading edge backwards and up toward a top portion of the drill head;
- and
- at least one fluid port located behind the leading edge that directs fluid at least partially downward at an angle away from a drill stem axis.
1 more element
A drill head, comprising:
- a drill head body, including a top portion, a bottom portion, side portions, and a leading edge, the leading edge being located adjacent to the bottom portion, the drill head body including:
- a taper from the leading edge outward to the side portions;
- a flat portion, adjacent to the leading edge and substantially parallel to the bottom portion of the drill head body;
- a center portion that transitions between the leading edge and the top portion of the drill head body;
- a steering surface that transitions between a back of the flat portion to the top portion of the drill head body;
- and
- a number of hardened inserts secured to the drill head body including an elongated insert with an edge pointing forward from the leading edge of the drill head body.
4 more elements
A drill head, comprising:
- a drill head body, including a top portion, a bottom portion, side portions, and a leading edge, the leading edge being located adjacent to the bottom portion, the drill head body including:
- a taper from the leading edge outward to the side portions;
- a flat portion, adjacent to the leading edge and substantially parallel to the bottom portion of the drill head body;
- a center portion that transitions between the leading edge and the top portion of the drill head body;
- a steering surface that transitions between a back of the flat portion to the top portion of the drill head body;
- a number of hardened inserts secured to the drill head body including an elongated insert with an edge pointing forward from the leading edge of the drill head body;
- and
- at least one fluid port that directs fluid at an angle away from a drill stem axis.
5 more elements
Dependencies are inferred from the claim text.