Detachable drill bit for impact drilling

Details Detachable drill bit for impact drilling Detachable drill bit for impact drilling

1975-10-06

1977-01-18

Purser, Ernest R.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

173 80, 173132, E21C 1300

Patent

active

040034429

ABSTRACT:
An impact drilling apparatus has an anvil inside a casing for receiving impact blows from a hammer. The lower end of the anvil is threadably connected to a drill bit having an external load bearing shoulder. On the lower end of the casing is attached a driver guide sub which extends downwardly around the threaded connection between the drill bit and anvil to bear on the external load bearing shoulder for transmitting down weight to the bit and simultaneously counteracting lateral forces acting on the bit and anvil. A spline connection is provided between the driven guide sub and the anvil. In the off bottom position, a shoulder of the anvil comes to rest against the top of the driver guide sub which stops the reciprocating action of the hammer while drilling fluid continues to flow.

REFERENCES:
patent: 3050032 (1962-08-01), Carey
patent: 3167136 (1965-01-01), Cook
patent: 3195657 (1965-07-01), Collier
patent: 3709306 (1973-01-01), Curington
patent: 3795283 (1974-03-01), Oughton
patent: 3924690 (1975-12-01), Shaw

Affiliated with

Also associated with

Rating

Detachable drill bit for impact drilling does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detachable drill bit for impact drilling, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detachable drill bit for impact drilling will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-67034