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MINI-MD Series TCI bits
ROLLER CONE BIT FOR SLIM HOLE DRILLING APPLICATIONS
In addition to the features of MD motor TCI bit ,MiniMD slim hole rock bit is also designed with special bearing &Seal structure and lubrication system.MiniMD bit’s cutter material and cutting structure are reasonably matches with rock properties of the formation and this eliminated the specific problems such as low drilling efficiency and cutter breakage and loss ,ect. MiniMD slim hole bit is the ideal choice for drilling slim hole sections in deep and ultra-deep well drilling applications
The size range of Mini-MD series bit is from 5 3/4 to 6 1/2 inch TCI bit,and IADC varies from 437b to 647 .For example:6 1/2 MD537
Bit type | MD116 |
Applicable formation | Very soft with low compressive strength and high drillabilty,such as soft shale ,clay and salt bed,etc. |
Main characteristics of the bit &Cutting Stracture | Hardfaced tooth surface and gage,high compact exposure,and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.25~0.90 |
Rotary Speed（rpm） | 180~80 |
Bit type | MD117 |
Applicable formation | Very soft with low compressive strength and high drillabilty,such as soft shale ,clay and salt bed,etc. |
Main characteristics of the bit &Cutting Stracture | Hardfaced tooth surface and gage,high compact exposure,with gage compacts and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.25~0.90 |
Rotary Speed（rpm） | 180~80 |
Bit type | MD126 |
Applicable formation | soft with low compressive strength and high drillabilty,such as soft shale ,clay and salt bed and soft limestone,etc. |
Main characteristics of the bit &Cutting Stracture | Hardfaced tooth surface and gage,high compact exposure,and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.25~0.90 |
Rotary Speed（rpm） | 180~80 |
Bit type | MD127 |
Applicable formation | soft with low compressive strength and high drillabilty,such as soft shale ,clay and salt bed and soft limestone ,etc. |
Main characteristics of the bit &Cutting Stracture | Hardfaced tooth surface and gage,high compact exposure with gage compacts,and a row of trimmers is added between gage row and heel row and heel row |
Normal WOB Kn/mm(bit dia) | 0.25~0.90 |
Rotary Speed（rpm） | 180~80 |
Bit type | MD136 |
Applicable formation | Soft to medium soft with low compressive strength or soft with harder stringers,such as hard gypsolyte,soft timestone and limestone, etc. |
Main characteristics of the bit &Cutting Stracture | Hardfaced tooth surface and gage,and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.35~0.90 |
Rotary Speed（rpm） | 120~60 |
Bit type | MD137 |
Applicable formation | Soft to medium soft with low compressive strength or soft with harder stringers,such as hard gypsolyte,soft timestone and limestone, etc |
Main characteristics of the bit &Cutting Stracture | Hardfaced tooth surface and gage,high compact exposure with gage compacts,and a row of trimmers is added between gage row and heel row and heel row |
Normal WOB Kn/mm(bit dia) | 0.35~1.05 |
Rotary Speed（rpm） | 120~60 |
Bit type | MD216 |
Applicable formation | Medium,hard with relatively higher compressive strength and hard stringers,such as hard shale, sandstone and limestone,etc |
Main characteristics of the bit &Cutting Stracture | Hardfaced gage and tooth surface ,and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.5~1.20 |
Rotary Speed（rpm） | 100~50 |
Rotary Speed（rpm） | 120~60 |
Bit type | MD217 |
Applicable formation | Medium,hard with relatively higher compressive strength and hard stringers,such as hard shale, sandstone and limestone,etc |
Main characteristics of the bit &Cutting Stracture | Hardfaced gage and tooth surface ,the gage fined with compacts for enhanced gage protection, and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.5~1.20 |
Rotary Speed（rpm） | 100~50 |
Bit type | MD417 |
Applicable formation | Very soft with low compressive strength and high drillabilty,such as soft shale ,clay,sandstone and conglomerate,etc. |
Main characteristics of the bit &Cutting Stracture | Large dia,offset crested scoop compacts in inner roe wedge compacts in outer row ,and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.35~0.90 |
Rotary Speed（rpm） | 140~70 |
Bit type | MD437 |
Applicable formation | Very soft with low compressive strength and high drillabilty,such as soft shale ,clay,sandstone and conglomerate,etc. |
Main characteristics of the bit &Cutting Stracture | Large dia,offset crested scoop compacts in inner roe wedge compacts in outer row ,and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.35~0.95 |
Rotary Speed（rpm） | 140~60 |
Bit type | MD447G |
Applicable formation | soft with low compressive strength and high drillability,such as soft shale ,clay,sandstone and soft limestone ,salt bed and gypsolyte ,etc. |
Main characteristics of the bit &Cutting Stracture | Conical compacts in inner row, wedge compacts in outer row, with added number of compact rows, and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.35~0.10 |
Rotary Speed（rpm） | 140~60 |
Bit type | MD517G |
Applicable formation | soft with low compressive strength and high drillability,such as soft shale ,clay,sandstone and soft limestone ,etc. |
Main characteristics of the bit &Cutting Stracture | Large dia,offset crested scoop compacts in inner roe wedge compacts in outer row ,and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.35~1.05 |
Rotary Speed（rpm） | 120~50 |
Bit type | MD527 |
Applicable formation | soft with low compressive strength and high drillability,such as soft shale ,clay,sandstone and soft limestone ,salt bed and gypsolyte ,etc. |
Main characteristics of the bit &Cutting Stracture | Conical compacts in inner row, wedge compacts in outer row, with added number of compact rows, and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.35~1.05 |
Rotary Speed（rpm） | 120~50 |
Bit type | MD537 & HAT547 |
Applicable formation | Medium soft with low compressive strength and harder abrasive stringers,,such as soft shale ,clay,sandstone and soft limestone ,salt bed and gypsolyte ,etc. |
Main characteristics of the bit &Cutting Stracture | Offset crested scoop compacts in inner row, wedge compacts in outer row, with added number of compact rows, and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.5~1.05 |
Rotary Speed（rpm） | 110~40 |
Bit type | MD617 |
Applicable formation | Medium soft with high compressive strength and thick & harder stringers,,such as hard shale ,clay,sandstone and soft limestone ,salt bed and dolomite ,etc. |
Main characteristics of the bit &Cutting Stracture | Large radius scoop compacts in inner row, wedge compacts in outer row, with added number of compact rows, and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.50~1.05 |
Rotary Speed（rpm） | 80~40 |
Bit type | HAT637 |
Applicable formation | Medium soft with high compressive strength and thick & harder stringers,,such as hard shale ,clay,sandstone and soft limestone ,salt bed and dolomite ,etc. |
Main characteristics of the bit &Cutting Stracture | Large radius scoop compacts in inner row, wedge compacts in outer row, with added number of compact rows, and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.70~1.2 |
Rotary Speed（rpm） | 70~40 |
Bit type | HAT737 |
Applicable formation | Medium soft with high compressive strength and thick & harder stringers,,such as hard shale ,clay,sandstone and soft limestone ,salt bed and dolomite ,etc. |
Main characteristics of the bit &Cutting Stracture | Large radius scoop compacts in inner row, wedge compacts in outer row, with added number of compact rows, and a row of trimmers is added between gage row and heel row |
Normal WOB Kn/mm(bit dia) | 0.70~1.20 |
Rotary Speed（rpm） | 70~40 web://www.tcirockbit.com
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TCI bits
