Drilling apparatus

Abstract

A drilling apparatus includes a percussive member configured to generate impact waves, a striking bar configured to receive impact waves from the percussive member, a rotation section at least partly enclosing the striking bar, a flushing section detachably connected to the rotation section, and a vibration isolator attached to the flushing section. The rotation section includes a bearing configured to support the striking bar. Further, the flushing section includes an inlet passage configured to receive a flushing medium.

What is claimed is: 
     
         1 . A drilling apparatus comprising:
 a percussive member configured to generate impact waves;   a striking bar configured to receive impact waves from the percussive member;   a rotation section at least partly enclosing the striking bar, the rotation section comprising a bearing configured to support the striking bar;   a flushing section detachably connected to the rotation section, the flushing section comprising an inlet passage configured to receive a flushing medium; and   a vibration isolator attached to the flushing section.   
     
     
         2 . The drilling according to  claim 1 , wherein the vibration isolator includes:
 an elastomeric member;   a support member configured to receive the elastomeric member, the support member being connected to the rotation section; and   a fastener configured to secure the elastomeric member to the flushing section.   
     
     
         3 . The drilling apparatus according to  claim 1 , wherein the striking bar includes an internal channel and an inlet port, and wherein the internal channel is in fluid communication with the inlet port. 
     
     
         4 . The drilling apparatus according to  claim 3 , wherein the flushing section further includes a cavity at least partly enclosing the striking bar, and wherein the cavity is in fluid communication with the inlet passage and the inlet port of the striking bar. 
     
     
         5 . The drilling apparatus according to  claim 4 , wherein the flushing section further includes a sealing member disposed at an end of the cavity. 
     
     
         6 . The drilling apparatus according to  claim 1 , wherein the bearing includes a front bearing and a rear bearing. 
     
     
         7 . A flushing section for a drilling apparatus comprising:
 a housing detachably connected to a rotation section of the drilling apparatus, the housing comprising:
 an inlet passage configured to receive a flushing medium; and 
 an inner surface enclosing a cavity, the cavity being configured to at least partly enclose a striking bar, wherein the cavity is in fluid communication with the inlet passage; and 
   a vibration isolator attached to the housing.   
     
     
         8 . The flushing section according to  claim 9 , wherein the vibration isolator includes:
 an elastomeric member;   a support member configured receive the elastomeric member, the support member being connected to the rotation section; and   a fastener configured to secure the elastomeric member to the flushing section.   
     
     
         9 . The flushing section according to  claim 7 , wherein the striking bar includes an internal channel and an inlet port, and wherein the internal channel is in fluid communication with the inlet port. 
     
     
         10 . The flushing section according to  claim 9 , wherein the cavity is in fluid communication with the inlet port of the striking bar. 
     
     
         11 . The flushing section according to  claim 7  further includes a sealing member disposed at an end of the cavity. 
     
     
         12 . The flushing section according to  claim 7 , wherein the rotation section includes a bearing configured to support the striking bar. 
     
     
         13 . The flushing section according to  claim 12 , wherein the bearing includes a front bearing and a rear bearing. 
     
     
         14 . A drilling apparatus comprising:
 a striking bar comprising a first end and a second end, the first end being configured to receive impact waves;   a first housing at least partly enclosing the striking bar;   a second housing detachably coupled to the first housing, the second housing comprising an intake passage for a flushing medium and a cavity in fluid communication with the intake passage, the striking bar being at least partly disposed in the cavity; and   a vibration isolator attached to the first housing.   
     
     
         15 . The drilling apparatus according to  claim 14 , wherein the first housing is disposed proximal to the first end and the second housing is disposed proximal to the second end. 
     
     
         16 . The drilling apparatus according to  claim 14 , wherein the striking bar includes an internal channel and an inlet port, and wherein the internal channel is in fluid communication with the inlet port. 
     
     
         17 . The drilling apparatus according to  claim 16 , wherein the cavity is in fluid communication with the inlet port of the striking bar. 
     
     
         18 . The drilling apparatus according to  claim 14  further includes a sealing member disposed at an end of the cavity. 
     
     
         19 . The drilling apparatus according to  claim 14 , wherein the first housing at least partly encloses a bearing configured to support the striking bar. 
     
     
         20 . The drilling apparatus according to  claim 19 , wherein the bearing includes a front bearing and a rear bearing.