Core drilling may also be called diamond core drilling, diamond drilling or coring. It is used for environmental, geotechnical and mineral exploration drilling. This unit is appropriate for those working in operational roles, at worksites within:
Civil construction
Coal mining
Drilling
Extractive industries
Metalliferous mining
This unit covers the conducting of conventional core drilling in resources and infrastructure industries. It includes planning and preparing for drilling, operating the drill and drill fluid system, using core orientation equipment, taking core samples, responding to problems, and maintaining equipment.
You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)
Prerequisites
Not applicable.
Co-Requisites
Not applicable.
Employability Skills
This unit contains employability skills.
Evidence Required
List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.
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 conducting conventional core drilling
implementation of requirements, procedures and techniques for the safe, effective and efficient completion of conventional core drilling tasks
working with others to undertake and complete the conventional core drilling tasks that meets all of the required outcomes
consistent timely completion of conventional core drilling tasks 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 the conventional core drilling tasks
Guidance information for assessment
Consult the SkillsDMC User Guide for further information on assessment including access and equity issues.
Submission Requirements
List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, checklist) and due date here
Assessment task 1: [title] Due date:
(add new lines for each of the assessment tasks)
Assessment Tasks
Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.
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 conduct conventional core drilling:
apply legislative, organisation and site requirements and procedures
apply routine checks and basic maintenance procedures for mud and water delivery pumps
identify, mix and apply of collar sealants
apply procedures for attachment of required equipment to collar casing
apply basic drilling fluid tests such as viscosity and specific gravity
apply procedures to ensure that core is handled correctly and placed in core trays as required
apply techniques for measuring bits and other related components
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 conduct conventional core drilling:
configuration of various thread forms and make up torque requirements
the function of hole collaring, use of casing and collar sealing techniques
methods required to produce uncontaminated samples
impregnated bit stripping procedures
bit selection for different types of drilling and different ground conditions
the relationships between penetration rate and bit life
the role that core blockages play in affecting sample quality
the functions of drilling fluids and control procedures
relationship between hole diameter, rod diameter, pump output and the specific gravity of formation cutting
types of mud and water delivery pumps and their applications
the purpose of drill hole surveys and the functions of azimuth and dip readings
purpose and principles of core orientation
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, organisation and site requirements and procedures
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
Hazards include:
incorrect speed of operation
inadequate maintenance
inner tube drop off
Coordination requirements may include:
drill team
other equipment operators
maintenance personnel
supervisors
worksite personnel
Drill rods may include:
conventional or wireline drill rods
casing - steel, PVC
Drill bits may include:
blade bits
tricone bits
PCD bits
surface set diamond core bits and reamer shells
impregnated diamond core bits and reamer shells
non-core diamond bits
Fluids may include:
drilling mud and additives:
polymers
soluble oils
fluid loss additives
water
salt
cement and cement additives
two part urethane foam
sealants - urethane foam, cement, gypsum
Core barrels may include:
conventional single tube core barrels
conventional double tube core barrels
conventional triple tube core barrels
starter barrels
chrome barrels
Rod and casing handling equipment may include:
manual handling
hoist plug
mechanised rod handlers
foot operated rod safety clamp
hydraulic rod/casing clamps
hydraulic rod/casing spinner
hook and clamshell
Collar attachments may include:
stuffing boxes
fluid control valves
T pieces
gas control equipment
Survey and core orientation devices may include:
single shot survey camera - mechanical/electronic
multi shot survey camera - electronic/mechanical
digital survey devices
spear type core orientation device
ball type core orientation device
pin type orientation devices
electronic orientation devices
Samples may include:
sampling from mud rotary
collection of sludge
core samples
Personal protective equipment includes:
steel-capped boots and hardhat
gloves
dust mask
eye and hearing protection
general protective and reflective clothing
Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.
Observation Checklist
Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice
Yes
No
Comments/feedback
Access, interpret and apply compliance documentation relevant to the work activity
Obtain, confirm and apply work instructions for the allocated task
Identify, manage and report all potential hazards
Resolve coordination requirements with others at the site prior to commencing and during work activities
Identify and use different drill rod or 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 and break out and remove drill rods and 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 and seal at the collar
Identify hole conditions requiring the use of drilling fluid additives
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
Assemble, maintain and use survey and core orientation devices
Read and record survey data
Operate core orientation devices
Implement control measures for minimising core loss
Identify core blockages affecting sample quality
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
Use the required personal protective equipment and follow safe working procedures
Strip impregnated bits according to required procedures
Dismantle and service head assembly
Maintain drill string
Maintain bit management, record required information and store bits correctly
Forms
Assessment Cover Sheet
RIINHB307B - Conduct conventional core drilling
Assessment task 1: [title]
Student name:
Student ID:
I declare that the assessment tasks submitted for this unit are my own work.
Student signature:
Result: Competent Not yet competent
Feedback to student
Assessor name:
Signature:
Date:
Assessment Record Sheet
RIINHB307B - Conduct conventional core drilling
Student name:
Student ID:
Assessment task 1: [title] Result: Competent Not yet competent
(add lines for each task)
Feedback to student:
Overall assessment result: Competent Not yet competent