Method and Jetting Head for Making a Long and Narrow Penetration in the Ground

Abstract

A method is for making a relatively long and narrow penetration in the ground where a jetting head that has a longitudinal axis is attached to a leading end of a tubular. The method comprises providing the jetting head with at least one fixed nozzle that is positioned at the leading end portion of the jetting head and where the fixed nozzle has an elongated cross section; and flowing liquid through the nozzle where a resulting liquid fan is directed towards the ground in front of the jetting head.

1 . A method for making a relatively long and narrow penetration in the ground where a jetting head, that has a longitudinal axis, is attached to a leading end of a tubular wherein the method comprises:
 providing the jetting head with at least one fixed nozzle that is positioned at the leading end portion of the jetting head and where the fixed nozzle has an elongated cross section; and   flowing liquid through the nozzle where a resulting liquid fan is directed towards the ground in front of the jetting head.   
     
     
         2 . A method according to  claim 1 , wherein the method further comprises providing the jetting head with at least two nozzles that are spaced about the longitudinal axis of the jetting head. 
     
     
         3 . A method according to  claim 1 , wherein the method further comprises directing the fluid from the nozzle at an angle relative the longitudinal axis. 
     
     
         4 . A method according to  claim 1 , wherein the method further comprises rotating the jetting head about the longitudinal axis. 
     
     
         5 . A method according to  claim 1 , wherein the method further comprises including abrasive material in the liquid. 
     
     
         6 . A jetting head for making a relatively long and narrow penetration in the ground comprising a jetting head that has a longitudinal axis and is attachable to a leading end of a tubular, wherein the jetting head has at least one in its cross section elongated fixed nozzle that is positioned at the leading end portion of the jetting head. 
     
     
         7 . A jetting head according to  claim 6 , wherein the jetting head has at least two nozzles that are spaced about the longitudinal axis of the jetting head. 
     
     
         8 . A jetting head according to  claim 6 , wherein the nozzle is directed at an angle relative the longitudinal axis. 
     
     
         9 . A jetting head according to  claim 8 , wherein the angle is less than 45 degrees.