3-3/4” S21
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Catalog excerpts

ROLLER CONE BIT 3-3/4” S21 (95,2mm) IADC 211 VALCO ID: 01095211S17A0 REV.0 DRILLING APPLICATIONS Designed to drill soft to medium formations, compressive strength of which doesn't exceed 45 MPa (6500 psi). These include shale, limestone, sandstone, mud stone, and dolomite. DESIGN SPECIFICATIONS Bearing Type Friction w/Ball Retention Bearing Seal Type None Cutting Structure Milled tooth Rows Total: 8 Inner: 5 Gauge: 3 Insert/Teeth Total: 85 Inner: 43 Gauge: 42 Method of flushing fluid OPERATING PARAMETERS 4000 to 16500 lbf Weight on Bit* 1800 to 7500 daN 1,8 to 7,5 Tonnes Rotary Speed* 140 to 50 RPM - Actual drilling parameters must be determined for specific applications. Note: Due to continuous improvement of valco products, the design is subject to change without prior notice. Copyright © 201 5 VALCO. All Rights Reserved.

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