DTH Hammers, Overburden Systems

Updated: 16.02.2024
Overburden Bit
1 image

TRB overburden drilling systems are designed for drilling with simultaneous casing advancement. The wings are retracted by reverse rotation.

ModelCasing Size ODCasing Size IDCasing Size WallBit Ø ExpendedBit Ø RetractedNo. of WingsApplicable Hammer
mmmmmmmmmm
TRB 90114102.85.6126902TG 35
TRB 115141.3128.16.61571132TG 40
TRB 130148.7133.77.51551172TG 40
TRB 140168.3146.410.951761322TG 50
TRB 150177.81675.41881502TG 50 / TG 60
TRB 165193.1182.35.42031632TG 60
TRB 1902192009.52291802 or 3TG 60 / TG 80
TRB 215244231.46.32602132 or 3TG 80
TRB 240285265102992412 or 3TG 80
TRB 250301.6272.214.73122533TG 80
TRB 280335.9315.9103502923TG 100
TRB 315365331173723053TG 100 / TG 120
TRB 365406374164223503TG 120 / TG 125
TRB 410457.2425.2164773993TG 320
TRB 460508476165264523TG 320
TRB 510558.8539.89.55785103TG 450
TRB 560609.6584.212.76305543TG 450
TRB 610660.463512.76826053TG 550
TRB 660711.2685.812.77336443TG 550
TRB 710762742107827083TG 550
TRB 760813775198357423 or 4TG 550
TRB 810863819228747813 or 4TG 640
TRB 860914.4882.4169368354TG 640
TRB 9601,016986151,0549505TG 800
TRB 10601,219.21,168.425.41,2511,1256TG 800
TRB 90
Casing Size OD114 mm
Casing Size ID102.8 mm
Casing Size Wall5.6 mm
Bit Ø Expended126 mm
Bit Ø Retracted90 mm
No. of Wings2
Applicable HammerTG 35
 
TRB 115
Casing Size OD141.3 mm
Casing Size ID128.1 mm
Casing Size Wall6.6 mm
Bit Ø Expended157 mm
Bit Ø Retracted113 mm
No. of Wings2
Applicable HammerTG 40
 
TRB 130
Casing Size OD148.7 mm
Casing Size ID133.7 mm
Casing Size Wall7.5 mm
Bit Ø Expended155 mm
Bit Ø Retracted117 mm
No. of Wings2
Applicable HammerTG 40
 
TRB 140
Casing Size OD168.3 mm
Casing Size ID146.4 mm
Casing Size Wall10.95 mm
Bit Ø Expended176 mm
Bit Ø Retracted132 mm
No. of Wings2
Applicable HammerTG 50
 
TRB 150
Casing Size OD177.8 mm
Casing Size ID167 mm
Casing Size Wall5.4 mm
Bit Ø Expended188 mm
Bit Ø Retracted150 mm
No. of Wings2
Applicable HammerTG 50 / TG 60
 
TRB 165
Casing Size OD193.1 mm
Casing Size ID182.3 mm
Casing Size Wall5.4 mm
Bit Ø Expended203 mm
Bit Ø Retracted163 mm
No. of Wings2
Applicable HammerTG 60
 
TRB 190
Casing Size OD219 mm
Casing Size ID200 mm
Casing Size Wall9.5 mm
Bit Ø Expended229 mm
Bit Ø Retracted180 mm
No. of Wings2 or 3
Applicable HammerTG 60 / TG 80
 
TRB 215
Casing Size OD244 mm
Casing Size ID231.4 mm
Casing Size Wall6.3 mm
Bit Ø Expended260 mm
Bit Ø Retracted213 mm
No. of Wings2 or 3
Applicable HammerTG 80
 
TRB 240
Casing Size OD285 mm
Casing Size ID265 mm
Casing Size Wall10 mm
Bit Ø Expended299 mm
Bit Ø Retracted241 mm
No. of Wings2 or 3
Applicable HammerTG 80
 
TRB 250
Casing Size OD301.6 mm
Casing Size ID272.2 mm
Casing Size Wall14.7 mm
Bit Ø Expended312 mm
Bit Ø Retracted253 mm
No. of Wings3
Applicable HammerTG 80
 
TRB 280
Casing Size OD335.9 mm
Casing Size ID315.9 mm
Casing Size Wall10 mm
Bit Ø Expended350 mm
Bit Ø Retracted292 mm
No. of Wings3
Applicable HammerTG 100
 
TRB 315
Casing Size OD365 mm
Casing Size ID331 mm
Casing Size Wall17 mm
Bit Ø Expended372 mm
Bit Ø Retracted305 mm
No. of Wings3
Applicable HammerTG 100 / TG 120
 
TRB 365
Casing Size OD406 mm
Casing Size ID374 mm
Casing Size Wall16 mm
Bit Ø Expended422 mm
Bit Ø Retracted350 mm
No. of Wings3
Applicable HammerTG 120 / TG 125
 
TRB 410
Casing Size OD457.2 mm
Casing Size ID425.2 mm
Casing Size Wall16 mm
Bit Ø Expended477 mm
Bit Ø Retracted399 mm
No. of Wings3
Applicable HammerTG 320
 
TRB 460
Casing Size OD508 mm
Casing Size ID476 mm
Casing Size Wall16 mm
Bit Ø Expended526 mm
Bit Ø Retracted452 mm
No. of Wings3
Applicable HammerTG 320
 
TRB 510
Casing Size OD558.8 mm
Casing Size ID539.8 mm
Casing Size Wall9.5 mm
Bit Ø Expended578 mm
Bit Ø Retracted510 mm
No. of Wings3
Applicable HammerTG 450
 
TRB 560
Casing Size OD609.6 mm
Casing Size ID584.2 mm
Casing Size Wall12.7 mm
Bit Ø Expended630 mm
Bit Ø Retracted554 mm
No. of Wings3
Applicable HammerTG 450
 
TRB 610
Casing Size OD660.4 mm
Casing Size ID635 mm
Casing Size Wall12.7 mm
Bit Ø Expended682 mm
Bit Ø Retracted605 mm
No. of Wings3
Applicable HammerTG 550
 
TRB 660
Casing Size OD711.2 mm
Casing Size ID685.8 mm
Casing Size Wall12.7 mm
Bit Ø Expended733 mm
Bit Ø Retracted644 mm
No. of Wings3
Applicable HammerTG 550
 
TRB 710
Casing Size OD762 mm
Casing Size ID742 mm
Casing Size Wall10 mm
Bit Ø Expended782 mm
Bit Ø Retracted708 mm
No. of Wings3
Applicable HammerTG 550
 
TRB 760
Casing Size OD813 mm
Casing Size ID775 mm
Casing Size Wall19 mm
Bit Ø Expended835 mm
Bit Ø Retracted742 mm
No. of Wings3 or 4
Applicable HammerTG 550
 
TRB 810
Casing Size OD863 mm
Casing Size ID819 mm
Casing Size Wall22 mm
Bit Ø Expended874 mm
Bit Ø Retracted781 mm
No. of Wings3 or 4
Applicable HammerTG 640
 
TRB 860
Casing Size OD914.4 mm
Casing Size ID882.4 mm
Casing Size Wall16 mm
Bit Ø Expended936 mm
Bit Ø Retracted835 mm
No. of Wings4
Applicable HammerTG 640
 
TRB 960
Casing Size OD1,016 mm
Casing Size ID986 mm
Casing Size Wall15 mm
Bit Ø Expended1,054 mm
Bit Ø Retracted950 mm
No. of Wings5
Applicable HammerTG 800
 
TRB 1060
Casing Size OD1,219.2 mm
Casing Size ID1,168.4 mm
Casing Size Wall25.4 mm
Bit Ø Expended1,251 mm
Bit Ø Retracted1,125 mm
No. of Wings6
Applicable HammerTG 800