1- Roller Cone

ROLLER CONE BITS

Content :

Description of bit types available

Roller cone bit features

Use of IADC bit codes

Wide Variety of Bit Types

Roller Cone Bits

- Milled Tooth- Insert

Fixed Cutter Bits Polycrystalline

Diamond (PDC) Natural diamond

Specialty Bits Core Heads Hole Openers Underreamers Bi-center

Roller Cone Bit Features

Cutting Structure

cones

offset, intermesh

steel teeth

tungsten carbide inserts

Hardfacing

self sharpening

gage row, gage protection

shirttail protection

Bearings

roller bearings

journal bearings

Seals

axial

radial

non-sealed bearings

Solid Bearing System with Lubricant

O-Ring Seals in New Seal Gland

Increased Effective Bearing Length with Thicker Thrust Flange

ADE Designed Cutting Structure

Conventional Frame

Clear Coat Polyurethane Protective Paint

Dome Compensated Pressure Equalization System with Integral Pressure Relief Feature

Roller Cone Bit Features

Journal Structure

Journal Angle Centerline of Bit

Journal Angle

Journal

Cone Contour

Cone Geometry

Soft Hard

JournalAngle

Oversize Angle

Of Cone&Journal

Of Bit

JournalAngle

ConeAngle

Of Cone& Journal

ConeAngle

Oversize Angle

Small journal angle Large cone angle Large oversize angle

Large journal angle Small cone angle Small oversize angle

Cone angles

Offset

Cone Geometry

Direction of Rotation

Offset

Cone offset

Intermesh

Cutter Structure

Inserts to Cone Clearance

Teeth Projection & Pitch

Cutter Structure

Self-sharpening effect maintains the life of the cutting structure

Diamond Tech2000 hardfacing is applied internally into the tooth profile

Utilization of the claw profile increases the aggressiveness of the bit

Cutting Structure

Diamond Tech2000 Hardfacing

Hardfacing Technology

Incorporates nugget-shaped tungsten carbide particles and diamonds for maximum wear resistance

Gage Flank

Diamond Tech2000 Hardfacing

Diamond Tech2000 hardfacingcombines tungsten carbide

nuggets and encrusted diamond pellets

PelletsPellets

NuggetsNuggets

TCI Bit

Tungsten Carbide Insert Design

Soft

ShapedGauge

Sharp ToothShape

ChiselToothShape

Medium-Extension

ConicalShape

Short-Extension

ConicalShape

Medium

Hard

ToothShape

Long-Extension

Conical Shape

SphericalShape

90 DoubleConicalShape

120 DoubleConicalShape

Vectored Inserts

TCI Bit for Hard Formation

Standard frame body

Bit Technology

Bit Technology

Modular frame body

Modular frame design

4-piece construction

Improved accuracy of cone relationship

Bit Technology

Patented Diamond Tech2000 hardfacing

Increased hardfacing thickness

Tungsten Carbide compacts placed to provide maximum ball plug protection

Increased shirttail wall clearance improves cutting evacuation, reducing wear/erosion around the seal area

Arm and Shirttail Design

Shaped Cutters & Leg Protection

Extra Gauge Protection

Roller Ball - Roller Bearing

Precision bearing Hard Turn

Bearing Structure Details

New Bearing System

Centralized ball race improves bearing stability, increasing bearing life in directional applications

Increased bearing surface improves load distribution. Thicker thrust flange withstands higher in-thrust loading

Seal and Gland

.300 cross-section precision o-ring for increased seal effectiveness

New grease formula for improved seal life

High performance elastomer material

Journal Bearing Details

Central Ball Race Bearing

Centralized ball race improves bearing stability and increases load carrying capacity

Thick thrust flange withstands high in-thrust loading

.300" precision, high performance elastomer O-ring seal

Improved Claw Tooth cutting structure

Bearing Structure Details

Lubrication System

Increased grease capacity for longer bearing life

Dome compensation improves response to pressure changes

Long bleed hole drilled from reservoir

Pressure relief valve prevents high internal pressure

Pressure Compensation

Enlarged grease reservoir volume. Displaceable volume in the grease reservoir is doubled

Improved diaphragm quality

Grease Reservoir X Series arm

Lubrication System

Integral pads reduce bit whirl & other downhole vibrations

Provides 6 points of contact which increases bit stability 1/16" under gauge

Improved stability increases the life of the bearings and cutting structure, and also reduces vibration damage to other BHA components

Stabilization Pads

Hydraulics System

Improved hydraulics system

IADC Bit Codes

Refer to attached Bit Comparison Chart

Method to concisely describe a bit

3 numbers plus one letter (e. g., 114C)

First number relates to rock hardness

Second number refines hardness scale

Third number defines bearings & gage

Letters describe special features

Gallery

Monocone Bit

Gaging the Monocone Bit

The ring gage is nominal bit size

Two-Cone Bit