DRILL BIT ASSEMBLY FOR A DIRECTIONAL PERCUSSION BORING SYSTEM

摘要

The present disclosure describes various embodiments, as well as features and aspects thereof, of an improved drill bit assembly for a percussion boring system. More specifically, one non-limiting embodiment of an improved drill bit assembly for a percussion boring system comprises a bit and a product engagement member. The bit comprises a slant faced head and at least one exhaust port. The product engagement member comprises a product coupling portion and at least one fluid restriction portion. This improved drill bit assembly is such that, when the product engagement member is detachably engaged with the slant faced head of the bit, a first portion of the fluid stream expelled from the bit is directed substantially forward of the slant faced head and a second portion of the fluid stream is directed substantially rearward from the slant faced head.

主权项

1. A drill bit assembly for a percussion boring system, the drill bit assembly comprising:
a bit comprising a slant faced head and at least one exhaust port, the at least one exhaust port configured to expel a fluid stream; and a product engagement member comprising a product coupling portion and at least one fluid restriction portion, the product engagement member configured to detachably engage with the slant faced head; wherein, when the product engagement member is detachably engaged with the slant faced head, a first portion of the fluid stream is directed substantially forward of the slant faced head and a second portion of the fluid stream is directed substantially rearward from the slant faced head.