FLRT Bit

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Water Well Drilling Bit / HDD Pilot Bit 311.2mm FA517G API-7-1 Standard

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FLRT Bit
City:beijing
Province/State:beijing
Country/Region:china
Contact Person:MissJade
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Water Well Drilling Bit / HDD Pilot Bit 311.2mm FA517G API-7-1 Standard

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Brand Name :FLRT
Model Number :12 1/4 FA517G
Certification :API-7-1, ISO 9001:2008
Place of Origin :China
MOQ :20pcs
Supply Ability :300pcs per quarter
Delivery Time :5~45 workdays
Packaging Details :plywood box / iron box
Bearing Type :Sealed Friction Bearing
Cutting Material :TCI
Standard :API-7-1, ISO 9001:2008
Series :FA
IADC :517
Supplementary Features :G : Reinforced Gauge Protection
Application 1 :HDD Drilling ( Pilot Bit )
Application 2 :Shallow Oil Well Drilling
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311.2mm FA517G , Rock Bit, Water Well Drilling Bit , TCI Bit, Rotary Drilling Bit , HDD Pilot Bit

RECOMMENDED DRILLING PARAMETERS FOR APPLICATION

Types & IADC Code

417

437

447

517

527

517

527

537

547

617

627

637

WOB

KN/mm(Bit Dia.)

0.4~0.9

0.4~0.9

0.35~1.0

0.35~1.0

0.5~1.0

0.6~1.1

0.7~1.2

Lb/in. (Bit Dia.)

2285~5142

2285~5142

2000~5714

2000~5714

2857~5714

3428~6285

4000~6857

Rotation Speed (Rpm)

140~60

240~70

125~50

~60

110~50

100~40

80~4

Cone offset

  1. - It forces the cone to rotate around the axis of the bit
  2. - The cone slips as it rotates causing tearing and gouging action
  3. - Amount of offset directly relates to the strength of drilled rock
  4. - Large offset used for soft formation
  5. - Hard brittle rock need no offset
  6. - Medium hard rock need up to 2 offset
  7. - The degree of offset is defined as the horizontal distance between the axis of the bit and a vertical plane through the axis of the journal

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