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 applying blow out prevention operational procedures

implementation of requirements, procedures and techniques for the safe, effective and efficient completion of the applying of blow out prevention operational procedures

working with others to undertake and complete the applying of blow out prevention operational procedures that meets all of the required outcomes

consistent timely completion of the applying of blow out prevention operational procedures that safely, effectively and efficiently meets the required outcomes

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.

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.

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

Where applicable, physical resources should include equipment modified for people with disabilities.

Access must be provided to appropriate learning and/or 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 and/or oral assessment of the candidate's required knowledge

observed, documented and/or first hand testimonial evidence of the candidate's:

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

consistently achieving the required outcomes

first hand testimonial evidence of the candidate's:

working with others to undertake and complete blow out prevention operational procedures

Guidance information for assessment

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

Required skills

Specific skills are required to achieve the performance criteria in this unit, particularly for the application in the various circumstances in which this unit may be applied. This includes the ability to carry out the following as required to apply blow out prevention operational procedures:

apply legislative, organisation and site requirements and procedures

work in a team

take measurements

carryout calculations and estimations relevant to activities

interpret gauges

apply kick warning signs and indicators detection procedures

complete trip sheets

complete kill sheets

interpret work instructions and procedures

supervise drill assistant

conduct and evaluate drills and exercises

use hand and power tools

Required knowledge

Specific knowledge is required to achieve the Performance Criteria of this unit, particularly its application in a variety of circumstances in which the unit may be used. This includes knowledge of the following, as required to apply blow out prevention operational procedures:

the principles and practices of coal seam gas control

coal seam gas control procedures and their application

risks and their controls related to coal seam gas control

BOP annular equipment - types and operating principles

BOP control system principles

operating principles of chokes and manifolds

kill principles and methods

effects of hydrostatic pressure when drilling through gas bearing formations

sources of ignition and their dangers and controls

function, installation, operation, maintenance and use of coal seam gas control and auxiliary equipment

causes, effects and response to equipment failures

drilling parameters and their interpretation

purpose, operation and interpretation of measuring and testing devices

kick detection warnings and indications and the responses to them

purpose, type and conduct of coal seam gas control emergency drills and exercises

causes and effects of swabbing and surging

pressure concepts and effects

communication methods and protocols during coal seam gas control operations

influx parameters

safe coal seam gas shut-in requirements and procedures

tripping requirements and techniques

constant bottom coal seam gas pressure method

emergency shutdown methods

type, format and implementation of coal seam gas control documents

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Relevant compliance documentation

may include:

legislative, organisational and site requirements and procedures

manufacturer's guidelines and specifications

Australian standards

code of practice

Employment and workplace relations legislation

Equal Employment Opportunity and Disability Discrimination legislation

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

nature and scope of tasks

specifications

quality of finished works

achievement targets

operational conditions

obtaining of permits required

site layout

out of bounds areas

worksite inspection requirements

lighting conditions

plant or equipment defects

hazards and potential hazards

coordination requirements or issues

contamination control requirements

environmental control requirements

barricade and signage requirements

Coordination requirements may include:

drill team

other equipment operators

maintenance personnel

supervisors

worksite personnel

Hazards may include:

blow out gas to surface

ignition of gas

toxic gases

pressurised coal seam gas system

Working conditions may include:

night time operations

day time operations

hot climates

cold climates

snow

wet weather conditions

high wind

Early warning signs may be:

rate of penetration trends

drilling break

trends shown in torque/drag

Kick indicators may include:

flow from coal seam gas (pump off)

increase in flow from coal seam gas (pumps on)

pit volume gain

Swabbing and surging may be affected by:

coal seam gas and pipe geometry

coal seam gas depth

fluid characteristics

coal seam gas conditions and formation properties

tool pulling and running speeds

BHA configuration

Records and reports may include:

specifications

operator's instructions

drilling program

technical information

daily pre-tour checklist

daily pre-drilling checklist

BOP critical test parameters

AP RP 53

tour sheet

tour reports and drilling logs

kill sheet

incident report form

drilling line record sheet

shut-in procedures

equipment damage report

Communications may include:

2-way radio

hand signals

telephone

public address system

written work instructions

Drills and exercises may include:

pit drill

trip drill

abandonment drill

evacuation

Coal seam gas control equipment may include:

mud system

blow out preventer

manifolds and chokes

accumulator

degassers

monitors

diverters

auxiliary equipment

pressure measuring devices

gas detection equipment and devices

Washington-type diverters

Monitoring, reading and interpreting may apply to:

drilling fluid gain or loss

drilling parameters

pressure gauges

mud balance values

pump stroke counters

gas readings

amount of fluid added to coal seam gas

kick warnings and indicators

circulation rate

Coal seam gas control procedures and activities may include:

time of coal seam gas shut-in

initial shut-in pressures

stage of kill

type of kill procedure employed

status of coal seam gas control equipment

flow path for coal seam gas control method

agreed procedures

Corrective actions may include:

changing over pumps in the event of primary failure

using secondary choke in the event of primary failure

using alternate preventer in the event of primary failure

running accumulator emergency backup in case of primary failure

Operational instructions may include:

type of kill procedure to use

type of shut-in procedure to use

action to be taken in the event of approaching MAASP

monitoring pit levels

Working practices may include:

confirmation of shut-in

monitoring of shut-in pressures

monitoring of accumulator pressures

correct circulation rate to be maintained during kill

monitoring pump efficiency

individual operation

team operation

use of personal protective equipment

consideration of H2S and other toxic substances

consideration of flammables and ignition sources

maintaining continuous communication

reacting to on-site emergencies

Coal seam gas kill methods may include:

bringing pump up to kill speed

maintaining constant bottom coal seam gas pressure

shutting down the kill operation while maintaining a constant bottom coal seam gas pressure

controlling the influx using the Driller's Method

Monitoring and adjusting may include:

pressures

volumes

flows

Monitoring and controlling circulation and circulation paths may include:

existing and alternative paths from the pump through the choke manifold to the disposal system

valve status for specific circulating paths

assessing the circulation hydrostatic head to determine of a drop in the level of drilling fluid in the annulus on hydrostatics balancing pressure