Factory Price 22 Inch IADC 517 Api Tci Tricone Drill Bit Oil Well Direction Rock Drilling

WOB (KN)

Drilling hour (min/m)

RPM (r/min)

Drilling hour (min/m

1

80

8

100

7

2

100

9

120

5.5

3

60

7

80

8

Select

60

7

120

5.5

437/447/435

0.35~0.9

240~70

Very soft formations with low compressive strength and high drillability,such as clay,mudstone,chalk,gypsum,salt,soft limestone,
etc.

517/527/515

0.35~1.0

220~60

Soft formations with low compressive strength and high drillability,such as mudstone,gypsum,salt,soft limestone, etc.

537/547/535

0.45~1.0

220~50

Soft to medium formations with low compressive strength, such as medium, soft shale, medium soft limestone, medium soft sandstone,
medium formation with harder and abrasive interbeds, etc.

617/615

0.45~1.1

200~50

Medium hard formation with high compress strength, such as hard shale, limestone, sandstone, dolomite. etc

637/635

0.5~1.1

180~40

Hard formations with high compressive strength, such as sandstone, limestone, dolomite ,hard gypsum, marble, etc.