Required skills

Specific skills are required to achieve the performance criteria of this unit particularly for its application in the various circumstances in which this unit may be used This includes the ability to carry out the following as required to construct geothermal wells

apply legislative organisation and site requirements and procedures

calculate grout component quantities ie cement powder water and other additives as required

calculate hole and annular volumes

calculate grout specific gravity

calculate drilling fluid specific gravity to control formation fluid pressure

use Blow Out Preventers

apply writing skills to complete a range of documents including

stateterritory bore completion report

daily drill operation report

diagrams

brief descriptions

apply reading and interpreting of materials including

plans

diagrams

drill log

graphs

Note licences required may include

Water Well licence Class

Licence for particular drilling method

rotary mud

Bore Construction Permit

Bore DevelopmentWorks Approval

Required knowledge

Specific knowledge is required to achieve the performance criteria of this unit particularly for its application in the various circumstances in which this unit may be used This includes knowledge of the following as required to construct geothermal wells

legal requirements under the relevant stateterritory Water Act

equipment characteristics technical capabilities and limitations

basic geological formations ie basic knowledge of both soil and rock classifications and various formations which permit groundwater movement and factors affecting groundwater quality geothermal systems drillability and stability

potential safety hazards when siting a well

the necessity of having a signed agreementcontract with the client

Blow Out Prevention procedures and techniques

appropriate casing materials for various applications

hole preparation for cementing grouting operations

effects of various cement grout additives

pressure cementing methods

casing collapse characteristics

appropriate headworks design for geothermal well applications

types of drilling fluids

problem solving techniques

grout placement methods and procedures

range of numerical calculations including

volume eg mud pits drums tanks or wells of given dimensions

up hole velocity

cementwateradditives quantities

flow rates eg Lsec GPM

conversion from imperial to metric and vice versa

required mud weight to control formation fluid pressures

relevant occupational health and safety requirements including principles of duty of care

appropriate fishing operations for the types of drilling being undertaken

use of materials safety data sheets MSDS

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria required skills and knowledge range statement and the Assessment Guidelines for the Training Package

Overview of assessment

Critical aspects for assessment and evidence required to demonstrate competency in this unit

The evidence required to demonstrate competency in this unit must be relevant to worksite operations and satisfy all of the requirements of the performance criteria required skills and knowledge and the range statement of this unit and include evidence of the following

knowledge of the requirements procedures and instructions for the construction of geothermal wells

implementation of requirements procedures and techniques for the safe effective and efficient completion of the construction of geothermal wells

working with others to plan prepare and conduct the construction of geothermal wells

evidence of the consistent successful construction of geothermal wells

Context of and specific resources for assessment

This unit must be assessed in the context of the work environment Where personal safety or environmental damage are limiting factors assessment may occur in a simulated environment provided it is realistic and sufficiently rigorous to cover all aspects of workplace performance including task skills task management skills contingency management skills and job role environment skills

Assessment of this competency requires typical resources normally used in a resources and infrastructure sector environment Selection and use of resources for particular worksites may differ due to the site circumstances

The assessment environment should not disadvantage the participant For example language literacy and numeracy demands of assessment should not be greater than those required on the job

Customisation of assessment and delivery environment to sensitively accommodate cultural diversity

Aboriginal people and other people from a non English speaking background may have second language issues

Where applicable physical resources should include equipment modified for people with disabilities Access must be provided to appropriate learning andor assessment support when required

Method of assessment

This unit may be assessed in a holistic way with other units of competency The assessment strategy for this unit must verify required knowledge and skill and practical application using more than one of the following assessment methods

written andor oral assessment of the candidates required knowledge

observed documented andor first hand testimonial evidence of the candidates

implementation of appropriate requirement procedures and techniques for the safe effective and efficient achievement of required outcomes

consistent achievement of required outcomes

first hand testimonial evidence of the candidates

working with others to undertake and complete the construction of geothermal wells

Guidance information for assessment

Consult the SkillsDMC User Guide for further information on assessment including access and equity issues

Relevant compliance documentation may include:

Work instructions may come from briefings, handovers, plans and work orders and may be written or verbal, formal or informal and may include:

Hazards may include:

Coordination requirements may include:

Documented information may include:

Local geographic/geological knowledge may include:

Procedures to assemble and insert casing may include:

Equipment for assembly may include: