Google Links

Follow the links below to find material targeted to the unit's elements, performance criteria, required skills and knowledge

Elements and Performance Criteria

1. Plan and prepare for coiled tubing
   • Obtain, confirm and apply work instructions
   • Access, interpret and apply coil tube drilling documentation and confirm work activity is compliant
   • Identify and minimise environmental issues and potential hazards, and assess and address risks within scope of own role and according to workplace procedures
   • Select and wear personal protective equipment required for work activities
   • Communicate with other personnel at site according to work requirements and confirm briefings and handover details are communicated and received
   • Select equipment, tools and equipment required to carry out tasks, check for serviceability and rectify or report any faults within scope of own role
   • Check restraining devices on all pressure hoses
   • Fit and replace restraining devices on pressure hoses as required
   • Raise alarm and report as required
   • Position the crane hook to the centre of the storage reel
   • Hoist the storage reel over the centre of the carrier and lower into saddles
   • Lock down the storage reel with retainer brackets and set tension screws
   • Install circulating equipment
   • Remove mud tank side hoses, swivel and cross over
   • Line up saddles and cut excess coil tubing on rig floor with casing cutter
   • Align saddles to remove storage reel
   • Install dog nut and chain coil
   • Cut coil tubing according to manufacturer and work requirements
   • Open level wind box, shut off the motor and lockout rig and open storage reel saddles
   • Remove the lockout and prepare to pick up the coil
   • Measure amount of coil cut and record remaining length
2. Install tubing snake connector
   • Prepare coil tubing ends
   • Conduct NDT crack test on the tubing stake connector
   • Check the o-rings for die retention are not stretched out
   • Separate the two-piece tubing snake connector in the middle at the threads
   • Size, install and tighten threaded half of tubing snake connector into the tail end of the coil tubing on the storage reel
   • Size, install and tighten threaded half of tubing snake connector into tail end of coil tubing on the injector side
   • Align tubing connector up and screw two tubing stake connector pieces together at centre treads
   • Perform and pull test on the tubing snake and confirm that the connector is locked in prior to removing chains
3. Handle tubing snake connector
   • Inspect derrick and rig floor for equipment
   • Raise derrick until injector coil tubing end and storage reel coil tubing line up
   • Check the integrity of the tubing stake connection by performing a pull test
   • Lock out floor motor according to manufacturer requirements
   • Remove storage reel retention chain and dog nut
   • Remove lock from the floor motor
   • Engage storage reel while maintaining the correct pressure
   • Run coil with tubing stake connector through injector making cuts until the tubing snake connector is completely through the injector
4. Install set screw tubing dimple
   • Prepare coil tubing ends with a grinder
   • Install the dimple template
   • Tighten all set screws on the dimple template
   • Loosen screws and remove template
   • Deepen the template indents with a drill to dimple screw depth
   • Install the tubing dimple and dimple set screws according to manufacturer requirements
5. Conduct bottom hole assembly operations
   • Place float on bit and install bit sub onto bit
   • Run drill collar up v-door and pick up with top drive and elevators
   • Stab drill collar in bit sub and make up drill collar into bit sub
   • Pick up sub and position where needed for stabbing into stump
   • Stab the tubing dimple into the bottom hole assembly on the stump
   • Apply make up tong to dimple while rotating table to make up BHA
   • Apply breakout tong to dimple and make up to BHA while torqueing up BHA
6. Tripping in with coil tubing
   • Set bottom hole assembly depths at rotary Kelly bushing before lowering the lube tube
   • Confirm lube tube is down and air bag inflated on flow T
   • Confirm stripping head is deflated
   • Confirm the reel drag is set to no higher than 1000 psi
   • Set the traction pressure on the injector as low as possible without coil tubing slippage
   • Verify the trip speed with the Rig Manager
   • Verify level wind is continuously in line with coil tubing, depths are tracking correctly and conduct flow checks at the shaker box
7. Tripping out with coil tubing
   • Grease and inspect injector as per industry standards
   • Check the air bag on flow T is still inflated
   • Verify stripper rubber on the injector is inflated to the correct pressure, level wind is continuously in line with coil tubing and all depths are tracking at all times
   • Verify the trip speed with the Rig Manger
   • Lift the lube tube when bottom hole assembly reaches 75 metres prior to pulling out of hole
   • Conduct flow checks at specified intervals
8. Slip and cut coil tubing-grinder/rod cutter
   • Place tubing dimple at the desired working height
   • Place the hole cover in position
   • Run coil tubing through table to correct working height in cellar
   • Cut coil tubing with grinder/rod cutter
   • Remove with double wrapping sling and wire line
   • Lay down through v door

Performance Evidence

The candidate must demonstrate the ability to complete the tasks outlined in the elements, performance criteria and foundation skills of this unit, including evidence of the ability to:

conduct coiled tube drilling on at least two occasions, including:

using the following equipment:

coil tubing (diameter 1,200 – 2,200 metres)

storage reel

mud motor

dop drive

injector

level wind

in-coder

storage reel

spool coil

tubing snake connector

tubing dimple

saddles

lube tube

interpreting information from the weight indicator

measuring line string components and calculates hole depth

disassembling, describing the function of and inspecting components, replacing unserviceable parts and reassembling a bottom hole assembly.

During the above, the candidate must:

locate and apply required documentation, policies and procedures

work with others to conduct coil tube drilling that meets required outcomes, including:

using a range of communication techniques and strategies to communicate and coordinate information and activity to others

communicating the hazards of cuttings in the return air stream to all crew members.

---

Knowledge Evidence

The candidate must be able to demonstrate knowledge to complete the tasks outlined in the elements, performance criteria and foundation skills of this unit, including knowledge of:

key policies, procedures and established requirements for conducting coil tube drilling, including those for:

emergencies

work health and safety

environmental requirements

safe equipment operation

identifying faults with, performing maintenance on and cleaning equipment

monitoring hole for returns, cutting and sample quality

limiting the contamination of samples, cuttings and returns

identifying problems related to inaccurate measurement of bits and other related components

housekeeping

the critical need to hoist storage reel over the centre of the carrier correctly

bit selection methods for different types of drilling and different ground conditions

the role that blockages play in affecting sample quality

the critical need for restraining devices to be fitted to all pressure delivery hoses and sample delivery hoses (if used), the devices available and their methods of attachment

the importance of checking gauges and monitoring pressures, flow rates and temperatures.

---