ISO INTERNATIONAL STANDARD 22476-15 Firstedition 2016-08-15 Geotechnical investigation and testing Field testing - Part 15: Measuring while drilling Reconnaissance et essaisEssais de sol - Partie 15: Enregistrement des parametre de forages Reference number AX IS0 22476-15:2016(E) ISO @IS02016 IS0 22476-15:2016(E) 2 COPYRIGHTPROTECTEDDOCUMENT @ IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior writtenpermission.Permission canberequestedfromeitherIsOattheaddressbelow orIso'smemberbodyinthecountryof the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+41227490111 Fax+4122 74909 47 [email protected] www.iso.org ii @ IS0 2016 - All rights reserved IS0 22476-15:2016(E) Contents Page Foreword .iv Introduction .V 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Symbols 5 Equipment. .3 5.1 General 3 5.2 Drilling equipment 4 5.3 Measuring system. 5.3.1 General. 4 5.3.2 Sensors for hydraulic pressures 5.3.3 Measuring system for penetration length 5 5.3.4 Measuring system for flushing medium flow 5 5.3.5 Measuring system for rotational speed 5 5.3.6 Measuring of hammering energy 6 5.3.7 Reflected vibrations 6 5.3.8 Time. 6 5.4 Selection of measured parameters 6 5.5 Factors influencing MWD results 7 5.5.1 Tool influence 7 5.5.2 Drilling rig influence 1 5.5.3 Operator influence 7 6 Test procedures 7 6.1 General. 7 6.2 Position and level of drill rig 8 6.3 Preparation of the measurement 6.4 Drilling procedure. 8 6.5 Frequency of logging parameters 9 6.6 Registration of penetration length 9 6.7 Test completion 9 6.8 Equipment checks and calibrations. 10 7 Test results. 10 7.1 General. 10 7.2 Calculated parameters. 10 7.2.1 General. 10 7.2.2 Penetration rate 10 7.2.3 Down-thrust pressure .10 7.2.4 Net down-thrust pressure 11 7.2.5 Flushing medium pressure 11 7.2.6 Drill head rotational torque 11 8 Reporting. 12 8.1 General. 12 8.2 Reporting of test results 12 Annex A (informative) Application of drilling parameters .14 Annex B (informative) Graphical presentation of drilling parameters. .20 5 Bibliography .22 @IS02016-Allrightsreserved ili