Chevron And Step Drag Bit Size 6 1/2

Drag bit and PDC drag drill bits 
Stratum conditions                                                                                                          
PDC drag  drill bits are  mainly used for drilling soft and medium -hard formation. Such as mud stone, limestone, shale, sandstone and granite etc.

Appication:                                                                                                                 

 PDC drag drill bits are used to penetrate the degassing hole, drain hole, and grouting hole of coal mine, water canservancy and hydropower, road construction, bridge and building. 

Operating condition :                                                                                                       PDC drag drill bits work under low drilling pressure, midium-low drive speed  ,big drainage .

Available size:                                                                                                                     50mm,  56mm,  60mm,  65mm,  75mm,  94mm,   98mm,  113mm,  120mm,  120.5mm,  124mm,  143mm,   149mm,  152mm,  173mm,   190.5mm, 203mm, 254mm

Wireline core bit :  A gauge, B guage, N gauge, H gauge , P gauge.  
After sales service  :                                                                                                           
If any of the following occur , we will responsible for replace . And we will afford the shipping cost of replace.
1. Thread can not fit customers' rod or barrels.
2.Matrix or PDC cutters falling not caused by drilling.
3. Size, Cutters , or other technical parameters are different from the requirement of customers.
4. working life obviously short caused by manufacture.

2.TCI drilling  bit:                                                                                   

1)certified by ISO9001&API

2)Fast drilling rate

3)Strong cutting structure durability

4)be used for water well, oil field, underground, construction, geothermal, directional boring

5)Be used to drill low compressive strength,soft formation

6)various of model and dimension avaliable

7)rubber seal or metal seal

8)IADC:437,517,637,617

9)high quality and competitive price

10)including drill rods,drill collar,rerun steel tooth bits, ,used drill bits stock,used mud pumps,etc

high toughness and durability suitable for different rock formation

3.Main features                                                                                        

1. Cutting Structure of this type sealed and non-sealed tci tricone bits :

The wear-resistance of teeth is enhanced with premium tungsten carbide hard facing on the tooth surfaces for steel tooth bit.

2. Gauge Structure of this type tci tricone rock bits:

Multiple gauge protection with gauge trimmers on the heel and gauge inserts on the gauge surface of the cone, tungsten carbide inserts and hard facing on the shirttail increases gauge holding capability and bearing life.

3. Bearing Structure of this type tci tricone rock bits :

High precision roller bearing with two thrust faces. Ball locks the cone. Thrust faces hard face with wear resistant alloy. Abrasion resistance and seizure resistance of the bearing are improved.
4.Available sizes:                                                                                      
FAQ(Frequently Asked Questions)

1. How to order the products?
Answer:
Send the inquiry with detail item description or with Model number.
If there is no packing demand we take it as sea-way packing.
If possible please attach one reference picture to avoid any misunderstanding or any links from our website for we get a better understanding.
2. About lead time and shipping time?
Answer :
The lead time depend on quantity of order. Usually shipped by sea, small order or urgent order we can send you by air after received your agreement.
According the distance from china to your port, usually from China to European about 25 days. To West of American 20 days.

3.Can I expect a quality products?
 Answer :
Yes. All our activities are accredited to ISO 9001:2008 and API, both in products and services, at the same time, mature production technology ensuring the quality satisfy international request

 please specify the following on enquiry,
Diameter,

Bit body,

IADC code,

Number of blades,

Main Cutter size,

Thread Connection,

Drilling formation
60mm, 65mm, 76mm, 93mm, 95mm, 98mm (3 7/8" ), 101.6mm, 114mm, 118mm, 120mm, 127mm(5" )
130.1mm(5 1/8" ), 133.3mm (5 1/4" ), 139.7mm(5 1/2" ), 142.8mm (5 5/8" ), 149.2mm (5 7/8" )
152.4mm (6" ), 155.5mm(6 1/8" ), 158.7mm(6 1/4" ), 161.9mm(6 3/8" ), 165.1mm (6 1/2" )
190.5mm (7 1/2" ), 193.6mm (7 5/8" ), 200.0mm (7 7/8" )
212.7mm(8 3/8" ), 215.9mm (8 1/2" ), 222.2mm(8 3/4" )
241.3(9 1/2" ), 244.4(9 5/8" ), 250.8(9 7/8" )
269.8(10 5/8" ), 295.3(11 5/8" )
311.1(12 1/4" ), 346.0 (13 5/8" ), 349.2(13 3/4" )
374.6(14 3/4" )
381(15" ), 393.7(15 1/2" ), 406.4(16" )
444.5(17 1/2" ), 508(20" ), 558(22" ), 609.6(24" )
660.4(26" )
5. Available models:                                                                                 
Steel tooth
(IADC code)
 111, 121, 131
117, 124, 126, 127, 136, 137
211, 311
216, 217, 227
TCI
(IADC code)
 415, 435, 417, 437
515, 525, 535, 545, 517, 527, 537, 547
615, 625, 635, , 617, 627, 637, 737
512, 522, 532, 612, 622, 632, 732