Roschen  Global
English
PRODUCTS
Home / Products / Mill Tooth Tricone Bit / Milled Steel Teeth Tricone Bits 7 1/2inch IADC216
Share to:

Milled Steel Teeth Tricone Bits 7 1/2inch IADC216

ROSCHEN experience over the last three decades has led to many improvements on this classic bit including our current design, which utilizes field-proven technologies, quality materials, and superior machining and heat treating processes. The result is a precision, high-value bit that produces consistent, lowest-cost-per-foot-drilled results.

Quantity:
  • 7 1/2inch IADC216
  • ROSCHEN
  • ROS-ST-191

Product Description

Milled Steel Teeth Tricone Bits 7 1/2inch IADC216


Product description:

 

Mill tooth tricone bits are used in soft rock formations. The protruding teeth are widely spaced to prevent getting clogged with material as they cut through the surface material. Tungsten carbide insert (TCI) tricone bits are used for medium and hard rock formations. These bits are designed with smaller teeth, which are more closely arranged together. Drill speeds are higher when the rock face is harder and TCI can withstand the heat generated from these conditions. Mud is pumped down the drill string and out through the tricone bit to keep the bit clean from cuttings and to move these cuttings back to the surface.

 

Tricone Bits with Steel Milled Teeth 7 1/2inch IADC216

Code No.

ROS-ST-191

Diameter

7 1/2''    / 191mm

Pin Type Dimensions

4 1/2'' API

Teeth Type

Steel milled

IADC No

216


mill tooth tricone bit 7 1 2inch

Open Bearing Steel Tooth Tricone Bit

ROSCHEN experience over the last three decades has led to many improvements on this classic bit including our current design, which utilizes field-proven technologies, quality materials, and superior machining and heat treating processes. The result is a precision, high-value bit that produces consistent, lowest-cost-per-foot-drilled results.

 

Steel milled teeth Tricone drill Bits or  Roller Cone Bits 


Rock formation

Bit type

Bit size

Drilling weight

Rotary speed

mm

inch

kN/mm

r/min

Very soft

Soft Marl, Clays, Sands, Salts etc.

1

187.3~346.1

7 3/8~13 5/8

441~735

120~50

soft

Clays, Soft Shale, Marl, Sands, Salts etc.

2

95.2~174.6

3 3/4-6 7/8

245-490

100-50

187.3~346.1

7 3/8-13 5/8

490-784

90-40

Medium soft

Shale, Marl, Sandstone, Soft Limestone etc.

3

95.2~174.6

3 3/4-6 7/8

245-490

80-40

187.3~311.1

7 3/8- 12 1/4

490-784

80-40

medium

Hard Shale, Limestone, Medium/Hard Sandstone etc.

4

95.2~174.6

3 3/4-6 7/8

294-539

80-60

187.3~241.3

7 3/8-9 1/2

539-833

60-40

medium hard

Hard Dolomite, Limestone, Hard Sandy, Rock etc.

5

95.2~174.6

3 3/4-6 7/8

294-539

80-60

187.3~241.3

7 3/8-9 1/2

539-833

60-40

hard

Sandy, Shale, Quartzite, Hard Dolomite, Hard Sandstone   etc.

6

95.~-174.6

3 3/4-6 7/8

294-539

80-40

187.3-215.9

7 3/8-8 1/2

580-882

60-40

Very hard

Quartzite, Chert, Basalt Granites, Pyrites etc.

7

95.2-174.6

3 3/4-6 7/8

294-539

80-40



Features:

 

1.    Silver plated journal bearings

2.     Silver plated thrust and nose washers

3.    Pressure compensating grease reservoir

4.    Premium synthetic rock bit lubricant optimized for tolerances

5.    Specifically designed tungsten carbide insert package

6.    Back ream inserts included 

7.    Compact spacing of inserts provide increased durability for the toughest formations 

8.    Premium Hard facing Tungsten Carbide provides a tough long lasting coating on Tooth Bits


QUICK LINKS

CONTACT US

Add: 65 EAST XINHUAN ROAD, SHANGHAI, CHINA
Tel: +86-21-54994419
Fax: +86-21-54380177
Whatsapp/WeChat: +86-13764195009

SALES TEAM LEADERS

Dr.Robert Roschen  /  Bill / Phiger  /  Rebecca

KEEP IN TOUCH
Copyright © 2019 Roschen Group Limited. All Rights Reserved