Coupler for continuous circulation of drilling fluids through a drill wire, method of adding or removing tubulars to and from a drill wire, ground drilling apparatus

摘要

"COUPLER FOR THE CONTINUOUS CIRCULATION OF DRILLING FLUIDS THROUGH A DRILL WIRE, METHOD OF ADDING OR REMOVING TUBULARS TO AND A DRILL WIRE". The present invention comprising a coupler and method for continuously circulating a drilling fluid through a drill wire while adding or removing tubulars has a lower fluid pressure seal adapted to engage a drill wire; lower handles adapted to fit a drill wire; a valve positioned above said lower handles; upper loops adapted to fit a tubular to be added to or removed from said wire; and an upper fluid pressure seal adapted to engage said tubular.