ISO 22476-15:2016
Geotechnical investigation and testing — Field testing — Part 15: Measuring while drilling
ISO 22476-15:2016 specifies the technical principles for measuring equipment requirements, the execution and reporting on the parameters of the investigation drilling process for geotechnical purposes.
It is applicable to top-driven, destructive drilling methods performed by a fully hydraulically powered drill rig and driving device. It is commonly used with destructive drilling techniques but can also be used with core drilling.
The recording of the drilling parameters during soil grouting, drilling of nails, anchors or piles are beyond the scope of ISO 22476-15:2016.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Equipment
5.1 General
5.2 Drilling equipment
5.3 Measuring system
5.3.1 General
5.3.2 Sensors for hydraulic pressures
5.3.3 Measuring system for penetration length
5.3.4 Measuring system for flushing medium flow
5.3.5 Measuring system for rotational speed
5.3.6 Measuring of hammering energy
5.3.7 Reflected vibrations
5.3.8 Time
5.4 Selection of measured parameters
5.5 Factors influencing MWD results
5.5.1 Tool influence
5.5.2 Drilling rig influence
5.5.3 Operator influence
6 Test procedures
6.1 General
6.2 Position and level of drill rig
6.3 Preparation of the measurement
6.4 Drilling procedure
6.5 Frequency of logging parameters
6.6 Registration of penetration length
6.7 Test completion
6.8 Equipment checks and calibrations
7 Test results
7.1 General
7.2 Calculated parameters
7.2.1 General
7.2.2 Penetration rate
7.2.3 Down-thrust pressure
7.2.4 Net down-thrust pressure
7.2.5 Flushing medium pressure
7.2.6 Drill head rotational torque
8 Reporting
8.1 General
8.2 Reporting of test results
Annex A (informative) Application of drilling parameters
Annex B (informative) Graphical presentation of drilling parameters
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 Equipment
5.1 General
5.2 Drilling equipment
5.3 Measuring system
5.3.1 General
5.3.2 Sensors for hydraulic pressures
5.3.3 Measuring system for penetration length
5.3.4 Measuring system for flushing medium flow
5.3.5 Measuring system for rotational speed
5.3.6 Measuring of hammering energy
5.3.7 Reflected vibrations
5.3.8 Time
5.4 Selection of measured parameters
5.5 Factors influencing MWD results
5.5.1 Tool influence
5.5.2 Drilling rig influence
5.5.3 Operator influence
6 Test procedures
6.1 General
6.2 Position and level of drill rig
6.3 Preparation of the measurement
6.4 Drilling procedure
6.5 Frequency of logging parameters
6.6 Registration of penetration length
6.7 Test completion
6.8 Equipment checks and calibrations
7 Test results
7.1 General
7.2 Calculated parameters
7.2.1 General
7.2.2 Penetration rate
7.2.3 Down-thrust pressure
7.2.4 Net down-thrust pressure
7.2.5 Flushing medium pressure
7.2.6 Drill head rotational torque
8 Reporting
8.1 General
8.2 Reporting of test results
Annex A (informative) Application of drilling parameters
Annex B (informative) Graphical presentation of drilling parameters
Bibliography