Method and device for monitoring down-the-hole percussion drilling

摘要

A method and device for monitoring down-the-hole percussion drilling. A down-the-hole hammer is supplied with percussion and flushing fluid flow. The down-the-hole hammer is subjected to rotational force and to feed force. Percussion frequency or a related frequency of the down-the-hole hammer is sensed. A representation of a spread thereof is created so as to produce a response to an adjustment of at least one drilling parameter as a change of width of the spread.

主权项

1. A method for monitoring down-the-hole percussion drilling, the drilling being performed with a down-the-hole hammer, the method comprising:
detecting or estimating a control frequency or frequencies being representative of a percussion frequency of strikes per unit time of the down-the-hole hammer, and creating a representation of spread of distribution of said control frequency or frequencies so as to produce a response to an adjustment of at least one drilling parameter as a change of width of said spread.