best sevice and high quality
experienced staff and work experience
best price
API&ISO
Port: Tianjin seaport/China or as your requirment
Minimum Order Quantity: 1 Piece/Pieces
Supply Ability: 800 Piece/Pieces per Month following your order
Payment Terms: L/C,T/T
Contact Supplier
Packaging Detail: Plywood cases or as you like
Delivery Detail: 7 workdays after conforming your order
Bit size (in) | Specifications | Recommended drilling parameters | ||||||
| No. of cutters (pcs) | Gage length (mm) | No. of nozzles (pcs) | API reg. pin size (in) | WOB (kN) | RPM (r/min) | Mud flow rate (l/s) | HHP (w/mm2) | |
| 8 1/2 | 26 | 85 | 4 | 4 1/2 | 30-100 | 50-250 | 25-35 | 2-7 |
| 12 1/4 | 41 | 120 | 6 | 6 5/8 | 50-160 | 50-250 | 44-60 | |
| Formation | Bit type | Drilling Weight(KN/mm) | Rotary speed(r/m) |
| Very soft(soft marl,unconsolidated sandstone,salt,etc) | 437 | 0.4~0.7 | 200~60 |
| Soft(clay,marl,unconsoidated sandstone,salt,etc) | 517 | 0.5~0.85 | 200~60 |
| Medium soft(shale,marl,sandstone,soft limestone,etc) | 537 | 0.5~0.9 | 180~40 |
| IADC | Inches | mm | Std. API pin shank size(inches | Approxiimate weight of bits(kg) |
| 437 | 8 1/2 | 215.9 | 4 1/2REG | 42 |
| 517 | 8 1/2 | 215.9 | 4 1/2REG | 42 |
1.Please select the applicable formation and parameters according to the instructions.
2.Surface equipment and mud proterty must meet the requirement of drilling operation. Tripping and drilling must be smooth.
3.Bottom hole must be clean and bit mustn't be used for long section reaming.
4.Never heat the bit (e.g.welding,boiling and firing).Don't soak new bit in oil or force the cone to rotate.
5.Always use the nozzle made by Tengda and install them according to the specified procedures.Never use
defective nozzles with erosive marks, breaches or cracks,etc.
6.Drilling operator should analyze and judge downhole conditions at all times after the bit has been used for a certain period of time. ROP too low indicates compacts(teeth)are severely worn and the bit must not be used anymore. Bit should be pulled out and have the nozzles and watercourse checked if pump pressure changes suddenly.
Model No.: ST
Features: 1.PCB driller bit: 0.25mm~6.5mm
2.Low price HSS drill: USD 2.23
3.High quality drill
4.Quick service
5.Accept non-standard
Model No.: YT-097
Features: tools_resin filled Zero tolerance wheel
Diameter:50mm/75mm/100mm
High quality and competitive price
Model No.:
Features: Core drill bits
1.Dry drilling
2.Speed:2500-5000rpm
3.40-60s/hole for 3cm granite
4.Lifetime:80-100 holes...
Model No.:
Features: 6mm diamond core drill bit
1.Dry drilling
2.Speed:2500-5000rpm
3.Lead time:10-15days
4.40-60s/hole for 3cm granite
Model No.: FT- N354
Features: Manufacturing process: milled, fully ground
Point angle: 118
Flute Type: N
Material: HSS or HSS-Co
Finish: bright, black oxi
Model No.: ST
Features: 1.PCB drill mill: 0.25mm~6.5mm
2.Low price HSS drill: USD 2.23
3.High quality drill
4.Quick service
5.Accept non-standard
Model No.: ZT
Features: 1.Drilling tool: 1mm~12mm
2.Low price tungsten drill: USD 1.04
3.High quality carbide drill
4.Quick service
Model No.: ZT
Features: 1.Metal Drill tool: 1mm~12mm
2.Low price tungsten drill: USD 1.04
3.High quality carbide drill
4.Quick service
Model No.: ZT
Features: 1.Metal HSS Drill tool: 1mm~12mm
2.Low price tungsten drill: USD 1.04
3.High quality carbide drill
4.Quick service
Model No.: ZX--1000
Features: 1.our industry can produce all kinds of silicon carbide
2.strength of various styles for your reference
Model No.: ZX--0813
Features: 1.our industry can produce all kinds of silicon carbide heater
2.strength of various styles for your
Model No.: ZX--0813
Features: 1.our industry can produce all kinds of sic heater
2.strength of various styles for your