Tool for drilling boreholes

Details Tool for drilling boreholes Tool for drilling boreholes

B - Operations, Transporting

25

D

121/30

B25D 9/04 (2006.01)

Patent

CA 1156105

TOOL FOR DRILLING BOREHOLES Abstract of the Disclosure A tool for cutting percussive rotary drilling of bore- holes, comprising a hollow casing having a bit. A hammer piston is installed in the casing for reciprocations and for cooperation with the bit for imparting impact impulses thereto. The hammer piston divides a working space of the casing into a workstroke chamber and a return stroke cham- ber which are alternately connected through distribution means provided in the casing with a source of a fluid under pressure for reciprocations of the hammer piston. There are provided controlled throttling means in permanent communi- cation with distribution means which can be set to two lim- it positions so that in the first position they provide for a partial supply of a fluid for reciprocations of the hammer piston with minimum kinetic energy and in the second posi- tion the throttling means are completely closed so as to provide for the full supply of a fluid to the workstroke and return stroke chambers through the distribution means for reciprocations of the hammer piston at maximum kinetic energy. There are provided control means which are coupled to the bit and to the controlled throttling means for sett- ing them to the first position when the bit encounters a soft rock and to the second position when the bit encount- ers a hard rock.

373763

Affiliated with

Also associated with

Rating

Tool for drilling boreholes does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-492935