Drill rod for breaking up the edges of boreholes and a method for breaking up the edges of boreholes

Abstract

A drill rod for breaking up the edge of a hole comprises a cylindrical body, a buffer and injector nozzles. The drill rod injects air and water through its injector nozzles at the material deposited at the edge of the hole, thus achieving the breaking up thereof without the need to use auxiliary equipment or manual operations. A method for breaking up the edge of a hole is described, including using a rod to break up the edge of a hole, and comprising the stages necessary to perform this operation using a drill.

1 . A drill rod for breaking up an edge of a hole, comprising:
 a cylindrical body equipped with screws at its two ends;   a buffer fixed to the inside of the cylindrical body, close to a lower end of the cylindrical body, the lower end being an end closer to the ground; and   at least two injector nozzles positioned on a radial face of the cylindrical body.   
     
     
         2 . The drill rod in accordance with  claim 1 , wherein the buffer seals an inside of the cylindrical body of the rod. 
     
     
         3 . The drill rod in accordance with  claim 1 , wherein the rod comprises three injector nozzles linearly arranged along a horizontal direction and separated at 120°. 
     
     
         4 . The drill rod in accordance with  claim 1 , wherein the at least two injector nozzles are arranged at an angle of 105 to 120° in a clockwise direction in relation to a vertical axis. 
     
     
         5 . The drill rod in accordance with  claim 1 , wherein at least one of the at least two injector nozzles allows for communication between an inside of the cylindrical body and an external environment. 
     
     
         6 . A method for breaking up an edge of a hole using a drill rod equipped with a rotatable head and a carousel, comprising:
 uncoupling a common rod from the rotatable head;   turning the carousel and positioning the drill rod, allowing the carousel to be coupled to the rotatable head;   coupling the drill rod to the rotatable head;   raising the rotatable head, and separating the rod from the carousel;   advancing the rotatable head in a vertical direction, moving it towards the ground until injector nozzles of the drill rod are at the same height as an edge of the hole;   activating a mechanism for injecting air and water into the drill rod and rotating the rotatable head;   raising the rotatable head until the end of its length, allowing the drill rod to be uncoupled from the rotatable head;   activating the carousel, allowing it to receive the drill rod;   uncoupling the drill rod from the rotatable head; and   again activating the carousel and coupling the common rod to the rotating head.   
     
     
         7 . The method in accordance with  claim 6 , wherein the activating of the mechanism for injecting air and water into the drill rod and rotating the rotatable head is responsible for breaking up the edge of the hole, by injecting air and water at the edge of the hole through the injector nozzles of the rod.