Unit of competency

Modification History

Not applicable.

Application

This unit describes a participant’s skills and knowledge required to conduct down-hole hammer drilling in Drilling.

This unit is appropriate for those working in operational roles for down-hole hammer drilling.

Licensing, legislative, regulatory and certification requirements that apply to this unit can vary between states, territories, and Industry sectors. Relevant information must be sourced prior to application of the unit.

Unit Sector

Drilling

Elements and Performance Criteria

Foundation Skills

Foundation skills essential to performance are explicit in the performance criteria of this unit. Further information is available in the Resources and Infrastructure Industry Training Package Companion Volume.

Unit Mapping Information

RIIBHD305 Conduct down-hole hammer drilling

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=88a61002-9a21-4386-aaf8-69c76e675272

Assessment requirements

Modification History

Not applicable.

Performance Evidence

Evidence is required to be collected that demonstrates a candidate’s competency in this unit. Evidence must be relevant to the roles within this sector’s work operations and satisfy all of the requirements of the performance criteria of this unit and include evidence that the candidate:

• locates and applies relevant legislation, documentation, policies and procedures
• works effectively with others to undertake and complete conducting of down-hole hammer drilling that meets all of the required outcomes including:

• uses a range of communication techniques and strategies to communicate and coordinate information and activity to other
• communicates the hazards of cuttings in the return air stream to all crew members

• demonstrates consistent timely completion of down-hole hammer drilling that safely, effectively and efficiently meets the required outcomes on a minimum three (3) separate occasions including:

• correctly use the various rod/pipe handling equipment
• correctly and competently add/remove rods/pipe from the string
• correctly applies rotation speed and weight on the bit to maintain optimum performance
• correctly measures line string components and calculate hole depth
• correctly collars holes
• ensure that samples are monitored for sample quality, correctly collected and handled
• ensure that all string components are correctly maintained
• disassembles, describes the function of components, inspect components, replace unserviceable parts and reassemble a DTH hammer
• ensures that drill pipe is inspected regularly and wear rates monitored
• ensure that threads are inspected and maintained
• ensuring that bit sharpening equipment, used to sharpen TC bits are used correctly and safely and that bits are sharpened to correct tolerances

Knowledge Evidence

The candidate must demonstrate knowledge of conducting down-hole hammer drilling through:

• the critical need to match like threads with like threads on all tubular components and make up torque requirements
• the parameters relating to wear of drill pipe and integrity of threads
• the function of hole collaring
• the methods required to limit the contamination of samples
• the theory behind TC bit sharpening
• correct bit selection for different types of drilling and different ground conditions
• identifying problems related to inaccurate measurement of bits and other related components
• the importance of monitoring sample quantity
• the role that blockages play in affecting sample quality
• methods commonly used to clear down hole blockages in air drilled holes and the hazards associated with clearing blockages
• methods used to clear a blockage in a sample delivery hose and the hazards associated with clearing blockages
• the critical need for restraining devices to be fitted to all pressure delivery hoses and sample delivery hoses, the devices available and their methods of attachment
• dangers of drilled samples being returned to the surface at high velocity in air drilling operations and the parameters involved
• the importance of checking gauges and monitoring pressures, flow rates and temperatures

Assessment Conditions

• An assessor of this unit must satisfy the requirements of the NVR/AQTF or their successors; and Industry regulations for certification and licensing: and,
• this unit must be assessed in the context of this sector’s work environment; and,
• this unit must be assessed using Resources and Infrastructure Industry sector specific policies, procedures, processes and operational manuals; and,
• an assessor must demonstrate the performance evidence, and knowledge evidence as outlined in this Unit of Competency, and through five (5) years of work in the Industry sector; and,
• where a co-assessment or partnership arrangement exists between a qualified assessor and an Industry technical expert, the Industry technical expert can hold the unit being assessed, and/or demonstrate equivalency of skills and knowledge at the unit level. An Industry technical expert must also demonstrate a minimum of three (3) years of continuous work in the Industry sector, with the preceding one (1) year in the unit they are co-assessing.

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=88a61002-9a21-4386-aaf8-69c76e675272