E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/04 (2006.01) E21B 7/06 (2006.01) E21B 10/42 (2006.01) E21B 10/58 (2006.01) E21B 10/62 (2006.01)
Patent
CA 2310338
A directional boring head assembly having a directional boring head, with a deflection surface capable of steering the directional boring head, combined with a replaceable cutting member is provided. The position of the cutting member relative to the deflection surface permits the directional boring head to steer the boring machine along the desired path while providing enhanced cutting action adaptable to different soil types. As the boring machine is advanced with rotation, the leading edge of the cutting member contacts only a small portion of the perimeter of the borehole thereby increasing the contact stress between the cutting member and the face of the borehole for more aggressive cutting action in hard ground conditions. Additionally, the directional boring head is provided with a pocket adapted to conform to the cutting member. The pocket engages the cutting member so that the cutting member fits snugly within the directional boring head thereby increasing the stability of the cutting member within the directional boring head. The cutting member may be replaced to simplify maintenance and to accommodate a variety of soil conditions. The directional boring head and the cutting member function together to maximize the cutting and steering capabilities of the directional boring head assembly while maintaining the integrity of the overall structure.
Kirby Eades Gale Baker
The Charles Machine Works Inc.
LandOfFree
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