Unit of competency details
RIINHB412D - Construct geothermal wells (Release 1)
Summary
Companion volumes:
Unit of competency
Assessment requirements
Replaced release
You are currently viewing the components related to release 1.
The current release is release 2.
View release 2 details.
Training packages that include this unit
Qualifications that include this unit
Classifications
Classification history
| ASCED Module/Unit of Competency Field of Education Identifier | 030303 | Mining Engineering | 02/May/2014 | |
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Unit of competency
Modification History
Not applicable.
Application
This unit describes a participant’s skills and knowledge required to construct geothermal wells in Drilling.
This unit is appropriate for those working in supervisory or technical specialist roles.
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
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1. Plan and prepare for the construction of geothermal wells
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1.1 Access, interpret and apply construction of the geothermal wells documentation and ensure the work activity is compliant
1.2 Obtain, read, interpret, clarify and confirm work requirements
1.3 Identify and address potential risks, hazards and environmental issues and implement control measures
1.4 Select and wear personal protective equipment appropriate for work activities
1.5 Communicate and coordinate activities with others throughout the work activity
1.6 Discuss scope of work with client to gain general agreement on drilling plan
1.7 Communicate regular up to date information on progress, and/or problems encountered to client and/or other relevant parties
1.8 Provide details of the completed well to the appropriate authorities as required by the relevant state/territory legislation
1.9 Obtain and interpret emergency procedures, and be prepared for fire/accident/emergency
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2. Design geothermal wells
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2.1 Determine most appropriate construction methods from the reading and interpretation of all available documented information and local geographic/geological knowledge
2.2 Determine a drilling fluid program to suit the expected down-hole conditions and anticipated pressures/temperatures
2.3 Select appropriate bore/surface casing for the anticipated ground conditions and construction techniques
2.4 Ensure all necessary materials anticipated for the job are available and on site prior to commencement of construction phase
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3. Construct geothermal wells
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3.1 Carry out any pre-start and start up procedures
3.2 Identify, select and apply rig operational controls
3.3 Assemble and insert casing
3.4 Grout or otherwise seal surface casing
3.5 Conduct grouting operations to seal intermediate and/or production casing strings or to seal selected zones
3.6 Construct well in accordance with any applicable regulations, minimum construction requirements and the organisation’s internal procedures
3.7 Maintain plumbness and alignment of the hole within the required limitations
3.8 Recognise symptoms of a formation kick and take action to control the well
3.9 Maintain adequate supplies of water on site to quench the well if required
3.10 Collect, record and label formation samples
3.11 Maintain records accurately and legibly
3.12 Accurately calculate hole, annular, grout and mud pit volumes in cubic metres or litres
3.13 Comply with relevant workplace occupational health and safety requirements for both the drilling equipment and construction materials
3.14 Maintain tool string inventories
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4. Develop bore
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4.1 Use development techniques with care to prevent collapsing of casing or blow outs
4.2 Develop bore hole
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5. Carry out well maintenance and rehabilitation
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5.1 Undertake a process of diagnosis to determine likely cause of well deterioration
5.2 Devise a program of rehabilitation to ensure that the well is restored to a reasonable condition
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6. Decommission test/bore holes
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6.1 Determine suitable decommissioning procedures and select appropriate materials
6.2 Carry out the decommissioning (abandonment) of test holes or wells in geothermal systems
6.3 Verify position/location of hole for future reference
6.4 Dispose of drill and other fluids safely
6.5 Carry out housekeeping requirements
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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
RIINHB412B Construct geothermal wells
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 plan, prepare and conduct the construction of geothermal wells including:
- communicating clear and timely instructions to those involved
- preparing for and conducting briefings, toolbox and site meetings
- maintaining clear and legible written records and the reports
- demonstrates consistent timely construction of geothermal wells that safely, effectively and efficiently meet all of the required outcomes on a minimum of one (1) occasion including:
- determining most appropriate construction methods from the reading and interpretation of all available documented information and local geographic/geological knowledge
- selecting appropriate bore/surface casing for the anticipated ground conditions and construction techniques
- completing grouting operations to seal intermediate and/or production casing strings or to seal selected zones
- maintaining plumbness and alignment of the hole within the required limitations
- using development techniques to prevent collapsing of casing or blow outs
- carrying out the decommissioning (abandonment) of test holes or wells in geothermal systems
Knowledge Evidence
The candidate must demonstrate knowledge in, when constructing geothermal wells through:
- work, health and safety
- environmental issues
- operating drill rig
- housekeeping
- the equipment characteristics, technical capabilities and limitations
- the basic geological formations, i.e. basic knowledge of both soil and rock classifications and various formations which permit groundwater movement and factors affecting groundwater quality for aquifer systems, including drillability and stability
- potential safety hazards and sources of contamination when siting a well
- the necessity of having a signed agreement/contract with the client
- applying Blow Out Prevention procedures and techniques
- appropriate casing materials for various applications
- managing hole preparation for cementing (grouting) operations
- effects of various cement (grout) additives
- using pressure cementing methods
- casing collapse characteristics
- applying appropriate headworks design for geothermal well applications
- types of drilling fluids
- using grout placement methods and procedures
- applying a range of numerical calculations including:
- volume (e.g. mud pits, drums, tanks or wells of given dimensions)
- up hole velocity
- cement/water/additives quantities
- flow rates (e.g. L/sec, GPM)
- conversion from imperial to metric and vice versa
- required mud weight to control formation fluid pressures
- appropriate fishing operations for the type(s) of drilling being undertaken
- using of materials safety data sheets (MSDS)
- being prepared for fire/accident/emergency
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
