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PDC coring drill bit
8 1/2" X 4" (215.9X101.6mm)
IADC:M423
ID:WFN216M13801A
Design Specifications
Blade Qty 8
Total Cutters 32
Primary Cutter Size 13.44mm
Assistant Cutter Size Non
Gauge Cutter Size Non
Anti-quake ball size Non
Nozzle Qty. 8
Crown length 141mm
Gauge length 52mm
Connetion Size 250P
Make-up Torque 46.1-54.2kN·m
Assembly groove width Non
Bit Weight 30Kg
Operating Parameters
Rotary speed 60-500RPM
Flow rate 60-500L/S
Weigh on bit 40-200KN


PDC-coring-drill-bit-8-1-2-X-4-215-9X101-6mm-IADC-M423Managment System Certification

ISO9001

3-3.pngCertificate Search
Name:ISO9001
Reference:00112Q226862R0S/5100
Issued By:CQC
Validity Period:2012-03-27 ~ 2016-02-26
Range:Design and manufacture of PDC drill bit


Product Certification

API

3-3.pngCertificate Search

Name:API
Reference:7-1-1077
Issued By:American Petroleum Institute
Validity Period:2014-03-19 ~ 2017-03-19
Range:PDC Bits




Core drill bits for hard rock

1.balanced force design
2.reasonable layout of PDC cutters
4.high speed
5.adequate stocks


Characteristics of diamond core drill bits for hard rock :

-Arc type crown design and blade type cutter layout result in high ROP, high core recovery reate and long working life of bit, etc.

-Use both PDC cutters and diamonds for gage protection for extended bit life.

-Dynamic flow simulation technology is employed to optimize hydraulic design of the bit and enhance the bit’s cleaning and cooling abilities.

-Inner and outer diamond gage protection. The water course is located at inner gage protection and consequently, cutting elements can receive sufficient cooling and cleaning.

-Force-balance technology is used to improve stability of the bit and prevent the bit from balling up.


 Diamond core drill bits for hard rock with matrix or steel body

Our PDC core bits are the most cost effective way to drill or a core sample. Our bits have 9 or 12 PDC cutters standard. The bits can be constructed from matrix body or steel body. The matrix body bit will last longer initially but can crack after substantial use. The steel body bit is can be repaired and retipped at a considerable cost savings compared to purchasing a new bit.

 

These Diamond Bits use polycrystalline diamond (PDC) cutters to shear rock with a continuous scraping motion

1 Cutting structure is force balanced and bit blade is asymmetrically designed so that the coal on bit is balanced that resulting better stability of the bit.

2 Main cutters are high performance PDC cutters to insure service life of the bit while improving ROP

3 Cutter exposure is optimized to insure the bit can achieve higher ROP is soft to medium formations

4 Shock absorbers are designed to make the bit capable of drilling through formations with hard stringers.

5 Hydraulic system of the bit is optimized using dynamic flow palters simulation technology to enhance cleaning and cooling effects of the bit to effectively prevent bit from balling.  


 

1.Matrix Body diamond core drill bits for hard rock

Type and Features

PDC core bit can be customized for oil well,water well, mining, explorer well drilling.

Suitable Formation

Various of hardness rocks or mud except the hardest hardness or ununiform rocks like cobble.

Main Type

75/54mm,94/74mm,113/89mm,113/109mm,153/129mm,215/105mm,etc.

 

2.Steel Body diamond core drill bits for hard rock

Type and Features

PDC core bit can be customized for oil well,water well, mining, explorer well drilling.

Suitable Formation

Various of hardness rocks or mud except the hardest hardness or ununiform rocks like cobble.

Main Type

75/54mm,94/74mm,113/89mm,113/109mm,153/129mm,215/105mm,etc.

 

Specifications of diamond core drill bits for hard rock

Outside guage

6 in

6 1/4 in

5 3/4 in

152.4 mm

158.8 mm

146.1 mm

Core diameter

2 3/4 in

69.9 mm

Cutter size

0.5”/16 (in pcs.)

0.39”/2 (in/pcs.)

13/16 (mm/pcs)

Total PDC cutters

18pcs

18 pcs

Non changeable Nozzles

6/0.39” (pcs/in)

6/10 (pcs/mm)

Height

8.5 in

215.9 mm

 

Drilling Parameters of diamond core drill bits for hard rock

RPM

60-120

60-120

Weight on bit

4000-12000 lbs

2-6 tons

Flow rate

17-32 cfm

8-6 L/sec

Rotator Type

RSS, Motor

RSS, Motor

 

WDT 6 blade diamond core drill bits are designed to be the primier drilling bit with the greatest amount of core recovery in soft interbedded with medium formations of 2-5 category of hardness.

These bits are distinguished by an increased core recovery rate as they cut through the formation smoothly & focus a consolidated core sample through the centre of the barrel.

WDT core bits are equiped with stabilizing inserts and cutters of increased abrasive and wear resistance. These core heads are designed to track symmetrically and produce straight non-deviating holes & cores.

 

29 core bits WDT style matrix or steel body

A - 5.50” X 9 cutter

B - 5.750” X 12 cutter

C - 6.125” X 12 cutter



1-1.pngReturn PDC coring drill bit

2-2.pngReturn Leading Products


Design character:

■Straight blade and short gauge: When pumping pressure is low abrasive drilling mud can be discharged quickly to avoid bit balling and losing efficacy of bit.

■Cutters on wings, parabolic profiles design are to improve drilling speed and bit stability to improve efficiency of coring.

■Special nozzles layout is to make core bit cool and clean, to improve lifespan of bit.

■Adopting CFD emulational technology to calculate to optimize PDC bit, then reduce possibility of heavy breaking and wearing of bit.


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