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17 1/2'' IADC 517 API Standard Tungsten Carbide Insert Tooth Bit Foundation Drilling

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The spec of 17 1/2 inches 517 Tricone Bit


HENGJI BIT  SPEC

IADC CODE 517

17 12 517 (2)

Diameter

17 1/2 (444.5mm)

Tooth Type

TCI

Bearing Type

Elastomer sealed bearing

Circulation Type

Mud fluid

Thread Connection

7 5/8 API REG PIN

Nozzle

three jet nozzles

Gauge Protection

Available

Shirttail Protection

Available

Operating Parameters

RPM(r/min)

140-60

WOB(KN)

0.35-1.0

Formations

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

Application

water well drilling,oil &gas well drilling ,HDD,exploration,geothermal well drilling,drilling projects,etc


The features of Tricone drill bit

The tricone drill bit is subjected to heavy loads in tough working environments due to its complex bearing system and challenging manufacturing process. The cone and leg are constructed from chromium, nickel, and carburized alloy steel, while the roller and ball are made from high-strength spring steel. The guided sleeve is crafted from heat-resistant steel, the inner thrust block of the shirttail and inner hole of the cone are composed of cemented carbide, and the teeth are made from various grades of tungsten carbide to maintain the bit's quality.



Main parts manufacturing process of Tricone bit




Cone Processing process:



Normalizing--rough, fine turning of inside hole--rough, fine turning of surface--carburizing, quenching--hinge tooth holes--insert--grinding inner hole--testing and inspection.


Manufacturing Sequence of  Leg:


Normalizing--milling 120 degrees--the rough and fine turning of journal, surface weld wear resistant alloy--milling oil mold--drill through oil hole--carburizing, quenching--fine milling 120 degrees--grinding journal--inspection.


Assembly process:


Inspection of bearing parts--parts cleaning--bearing system assembly--general assembly--welding--shank threading--installation nozzle--stamping serial number--paint--greasing, packing for delivery.



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Hejian Hengji Bit Manufacture Co.,LTD  is specialized in researching and production of rock drilling bits , mainly includes tricone bits, PDC bits, HDD hole opener, foundation single roller cutters, drag bits and related tools with advanced CNC machines and R&D team.

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Junziguan industrial zone, hejian city, hebei province
+86-317 3213999
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