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Elements and Performance Criteria

1. Plan and prepare for wireline core drilling
   • Access, interpret and apply conduct wireline core drilling documentation and ensure the work activity is compliant
   • Obtain, read, interpret, clarify and confirm work requirements
   • Identify and address potential risks, hazards and environmental issues and implement control measures
   • Select and wear personal protective equipment appropriate for work activities
   • Communicate and coordinate activities with others throughout the work activity
   • Obtain and interpret emergency procedures, and be prepared for fire/accident/emergency
2. Operate core drill
   • Carry out pre-start and start up procedures
   • Identify, select and apply rig operational controls
   • Identify and use different drill rod and casing types, thread forms and thread make up parameters
   • Select appropriate drill bits and reamer shells
   • Adjust inner tube length to ensure appropriate fluid flow around the core
   • Use rod and casing handling equipment safely
   • Add/break out and remove drill rods/pipes and down hole equipment
   • Apply appropriate rotation speed, weight on the bit, drilling fluid flow rate and penetration rate applicable to the ground conditions
   • Measure drill string components and calculate depth of hole
   • Collar holes
   • Install casing
3. Operate drill fluid system
   • Identify hole conditions requiring the use of drilling fluids and chemicals
   • Select, prepare, apply, test and monitor suitable fluids and additives
   • Monitor fluid return and solids content and implement control measures
   • Monitor fluid and cuttings specific gravity and up hole velocity to ensure efficient hole clearing
   • Monitor causes of pressure in fluid systems
   • Select the appropriate fluid pumping rate for the hole size
4. Operate wireline
   • Use overshot retrieval and dry release system
   • Assemble and maintain wireline overshot
   • Use pump in and dry hole lowering devices
5. Use hole survey and core orientation equipment
   • Use survey tool, as required
   • Assemble and maintain survey and core orientation devices
   • Read and record survey data
   • Operate core orientation devices as required
6. Take core samples
   • Implement control measures for minimising core loss
   • Identify core blockages affecting sample quality
7. Respond to problems
   • Identify possible problems in equipment or process
   • Determine problems needing action
   • Determine possible fault causes
   • Rectify problem using appropriate solution within area of responsibility
   • Follow through items initiated until final resolution has occurred
   • Report problems outside area of responsibility to designated person
8. Complete equipment maintenance and housekeeping
   • Carry out shutdown and secure equipment
   • Strip impregnated bits according to manufacturer/company procedures
   • Dismantle and service backend assembly
   • Dismantle core barrels, service and replace worn/damaged components
   • Dismantle wireline retrieval components service and replace worn/damaged components if required
   • Maintain drill string
   • Maintain bit management, record required information and store bits correctly
   • Ensure housekeeping activities are completed
   • Process records
9. Plan and prepare for wireline core drilling
   • Access, interpret and apply conduct wireline core drilling documentation and ensure the work activity is compliant
   • Obtain, read, interpret, clarify and confirm work requirements
   • Identify and address potential risks, hazards and environmental issues and implement control measures
   • Select and wear personal protective equipment appropriate for work activities
   • Communicate and coordinate activities with others throughout the work activity
   • Obtain and interpret emergency procedures, and be prepared for fire/accident/emergency
10. Operate core drill
    • Carry out pre-start and start up procedures
    • Identify, select and apply rig operational controls
    • Identify and use different drill rod and casing types, thread forms and thread make up parameters
    • Select appropriate drill bits and reamer shells
    • Adjust inner tube length to ensure appropriate fluid flow around the core
    • Use rod and casing handling equipment safely
    • Add/break out and remove drill rods/pipes and down hole equipment
    • Apply appropriate rotation speed, weight on the bit, drilling fluid flow rate and penetration rate applicable to the ground conditions
    • Measure drill string components and calculate depth of hole
    • Collar holes
    • Install casing
11. Operate drill fluid system
    • Identify hole conditions requiring the use of drilling fluids and chemicals
    • Select, prepare, apply, test and monitor suitable fluids and additives
    • Monitor fluid return and solids content and implement control measures
    • Monitor fluid and cuttings specific gravity and up hole velocity to ensure efficient hole clearing
    • Monitor causes of pressure in fluid systems
    • Select the appropriate fluid pumping rate for the hole size
12. Operate wireline
    • Use overshot retrieval and dry release system
    • Assemble and maintain wireline overshot
    • Use pump in and dry hole lowering devices
13. Use hole survey and core orientation equipment
    • Use survey tool, as required
    • Assemble and maintain survey and core orientation devices
    • Read and record survey data
    • Operate core orientation devices as required
14. Take core samples
    • Implement control measures for minimising core loss
    • Identify core blockages affecting sample quality
15. Respond to problems
    • Identify possible problems in equipment or process
    • Determine problems needing action
    • Determine possible fault causes
    • Rectify problem using appropriate solution within area of responsibility
    • Follow through items initiated until final resolution has occurred
    • Report problems outside area of responsibility to designated person
16. Complete equipment maintenance and housekeeping
    • Carry out shutdown and secure equipment
    • Strip impregnated bits according to manufacturer/company procedures
    • Dismantle and service backend assembly
    • Dismantle core barrels, service and replace worn/damaged components
    • Dismantle wireline retrieval components service and replace worn/damaged components if required
    • Maintain drill string
    • Maintain bit management, record required information and store bits correctly
    • Ensure housekeeping activities are completed
    • Process records

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 documentation, policies and procedures

implements the requirements, procedures and techniques for the safe, effective and efficient completion of wireline core drilling including:

conducting routine checks and basic maintenance

mixing and applying collar sealants

using collar casing equipment attachment techniques

conducting basic drilling fluid tests, viscosity and specific gravity

core handling and tray placement

works effectively with others to undertake and complete wireline core drilling tasks that meet all of the required outcomes including:

complying with written and verbal reporting requirements and procedures

communicating clearly and concisely with others to receive and clarify work instructions

communicating clearly and concisely with others to resolve coordination requirements prior to commencing and during work activities

demonstrates completion of wireline core drilling that safely, effectively and efficiently meets all of the required outcomes on more than one (1) occasion including:

identifying and using different drill rod or casing types, thread forms and thread make up parameters

selecting appropriate drill bits and reamer shells

adjusting inner tube length to ensure appropriate fluid flow around the core

applying appropriate rotation speed, weight on the bit, drilling fluid flow rate and penetration rate applicable to the ground conditions

measuring drill string components and calculating depth of hole

installing casing and seal at the collar

identifying hole conditions requiring the use of drilling fluid additives

monitoring fluid and cuttings specific gravity and up hole velocity to ensure efficient hole clearing

selecting the appropriate fluid pumping rate for the hole size

assembling, maintaining and using survey and core orientation devices

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Knowledge Evidence

The candidate must demonstrate knowledge in conducting wireline core drilling through:

accessing, interpreting and applying the organisation and site requirements and procedures for:

work, health and safety

environmental issues

operating drill rig

housekeeping

understanding the configuration requirements of various thread forms and make-up torque requirements

understanding the function of hole collaring, use of casing and collar sealing techniques

complying with methods required to produce uncontaminated samples

understanding the impregnated bit stripping procedures

understanding the bit selection for different types of drilling and different ground conditions

understanding the measurement of bits and other related components

understanding the critical dimensions of a core barrel if the barrel has to be drilled through to reduce hole size

understanding the relationships between penetration rate and bit life

understanding the role that core blockages play in affecting sample quality

understanding the functions of drilling fluids and control procedures

understanding the relationship between hole diameter, rod diameter, pump output and the specific gravity of formation cutting

understanding the types of mud and water delivery pumps and their applications

understanding the hazards associated with wireline operations and control measures required

understanding the purpose of drill hole surveys and the functions of azimuth and dip readings and where it is applied

understanding the core orientation and where it is applicable being prepared for fire/accident/emergency

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