3-1/2” S73
1Pages

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Catalog excerpts

DRILLING APPLICATIONS Designed to drill hard and abrasive formations, compressive strength of which doesn't exceed 250 MPa (36300 psi). These include quartzite, granite, basalt, andesite, schist, gneiss, silica limestone, rhyolite. DESIGN SPECIFICATIONS FEATURES Bearing Type Friction w/Ball Retention Bearing Seal Type None Cutting Structure Conical TC Inserts Rows Total: 12 Inner: 9 Gauge: 3 Insert/Teeth Total: 87 Inner: 55 Gauge: 32 Method of flushing fluid Bit Connection Type N-Rod (4Thd) OPERATING PARAMETERS 6900 to 23100 lbf Weight on Bit* 3100 to 10500 daN 3,1 to 10,5 Tonnes Rotary Speed* 90 to 50 RPM Note: Due to continuous improvement of valco products, the design is subject to change without prior notice. - Actual drilling parameters must be determined for specific applications. Copyright © 201 6 VALCO. All Rights Reserved.

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