Concentric overburden drill bit with blocks for water well projcet - Product

Other Specification : Concentric Overburden Drill Bit With Blocks - - - - Specification | - - - - 1.Face: Flat,Convex,Concave,Drop-center. 2.Carbide Button Shape: Spherical,Semi-ballistic,Ballistic And Two-step 3.Bit Shank: COP/DHD/QL/SD/MACH/BR - - - - A | B | C | D | E | F | Outer Dia. Of Casing Tube | Inner Dia. Of Casing Tube | Reamed Dia. | Min. Inner Dia. Of Casing Shoe | Hammer Type | Drill Pipes | Mm | Mm | Mm | Mm | | Mm | 168 | 149-155 | 184 | 140 | TH122 | 76,89 | 178 | 159-165 | 194 | 150 | TH122 | 76,89 | 193 | 173-180 | 206 | 164 | TH139 | 89,114 | 219 | 199-206 | 234 | 182 | TH139,TH180 | 89,114 | 244 | 224-231 | 260 | 210 | TH180,TH220 | 114 | 273 | 251-257 | 305 | 240 | TH180 | 114,127 | 323 | 301-310 | 348 | 284 | TH180,TH220 | 127 | 406 | 382-388 | 440 | 364 | TH220,TH275 | 127,140 | 457 | 433-439 | 488 | 413 | TH275 | 127,140 | 508 | 484-490 | 538 | 464 | TH275 | 140 | 558 | 534-540 | 590 | 514 | TH275,TH398 | 140 | 610 | 586-592 | 642 | 566 | TH275,TH398 | 140,168 | 660 | 636-642 | 694 | 615 | TH398 | 168 | 711 | 687-693 | 745 | 665 | TH398 | 168 | 762 | 738-744 | 798 | 716 | TH600 | 168 | 863 | 839-845 | 900 | 815 | TH600 | 168 | - - - - - - - - General Introduction | - - - - Application Range It Is Recommended To Drill In Rock Formation Where Contains Some Ovals And Fractures. Design Principles Make The Casing Follow Easy And The Equipment And Operation Simple Outstanding Advantages 1.The Stable And Reliable Working Performance And The Less Vibration Of Drill Rig. 2.Flexible To Open And Close. Operation Procedure 1.when The Drilling Starts, The Blocks Slides Down Through The Grooves On Pilot Bit,and Reams To Drive T

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