PDC DRILL BIT

TECHNICAL SUMMARY

PDC bits are designed and manufactured in two structurally dissimilar styles: Matrix-body bit and Steel-body bits. The two provide significantly different capabilities, because both types have certain advantages, a choice between them would be decided by the needs of the application.
▪️Matrix-body
“Matrix” is a very hard, rather brittle composite material comprising tungsten carbide grains metallurgical bonded with a softer, tougher, metallic binder. Matrix is desirable as a bit material, because its hardness is resistant to abrasion and erosion. It is capable of withstanding relatively high compressive loads, but, compared with steel, has low resistance to impact loading.
Matrix is relatively heterogeneous, because it is a composite material. Because the size and placement of the particles of tungsten carbide it contains vary (by both design and circumstances), its physical properties are slightly less predictable than steel.
Matrix body bits are manufactured by mold process. The tungsten carbide and binder materials are arranged into the mold. The mold get placed in to the furnace for certain period of the time and materials are cooked to certain temperature. The mold later cooled down and broken to remove the unfinished matrix bit.
▪️Steel-body
Steel is metallurgical opposite of matrix. It is capable of withstanding high impact loads, but is relatively soft and without protective features, would quickly fail by abrasion and erosion. Quality steels are essentially homogeneous with structural limits that rarely surprise their users. Steel body bits are manufactured by machining the steel bars per design.

 

PDC DRILL BIT

SPECIFICATION

Bit Size

Product Specification

Recommended Drilling Parameters

Primary Cutter

Gauge Length

Nozzie Qty/Type

API Pin Size

WOB

Rotary Speed

Flow Rate

4 5/8 ~ 5

8~13.4

1.0~1.5

4R

2 7/8REG

10~50

50~200

6~15

6

13.4~16

1.0~1.5

4R

3 1/2REG

10~100

50~200

8~25

8 1/2~8 3/4

16~19

2.0~2.5

6R

4 1/2REG

30~120

80~800

23~38

9 1/2

19

2.0~3.0

6R

6 5/8REG

30~140

80~800

25~38

12 1/4

19

2.5~3.5

8R

6 5/8REG

50~150

80~800

25~48

16

19

2.5~3.5

8R

7 5/8REG

30~280

80~600

30~70

17 1/2

19

2.5~3.5

8R

7 5/8REG

50~280

80~600

44~90

26

19

2.5~3.5

8R

7 5/8REG

50~280

80~600

44~90

Note: The upper limits of WOB and RPM in above shouldn’t be used simultancously.