NW NW 1 RIG UP AND TAR 1 no sub-code RIG UP AND TAR DOWN Start: Rig released from previous well, nd: Rig fully rigged up, acceptance tests successfully completed, and signed off. DOWN 1 1 Rig Under Tow 1 2 Anchor Handling 1 3 Jack up 1 hole 4 Tug Operations 1 5 Preload 1 6 Skid Cantilever Catilever skidding to a well where the rig is required. Start: nd of previous operation. nd: When rig is in place and next operation starts. 1 7 Skid Derrick Derrick skidding to a well where the rig is required. Start: nd of previous operation. nd: When rig is in place and next operation starts. 1 8 Jack Down Rig Up Rig Down Moving Prep to Move/Skid Walking Inspections of anchor handling & towing vessels Ballasting Support vessel inspection Surveying location Deploying transponders Spot and position Skid up/skid out Skid in 2 DRILL ACTUAL 2 no sub-code DRILL ACTUAL All activities related to drilling (excluding coring) in all the hole sections of a well, including the logging at TD. 2 1 Drill Ahead Start: Drilling a new formation, nd: When the bit is returned to the drill floor after reaching TD. In the case the hole is logged: once circulating prior to pulling out of hole for logging. 2 2 Hole Opening Opening Hole. 2 3 Clean Out Shoe Track Cleaning out shoe track. 2 4 Work Pipe Working stuck pipe. 2 5 Milling The application of tools, equipment and techniques for milling. Start: Once the decision has been taken to commence a milling operation, or when it is evident that milling needs to take place. This operation can at times start with a trip out of the hole. nd: When resuming operations as carried out prior to the start of the milling operationa at the same depth. A dedicated clean out trip prior to commencing drilling operations would still be considered part of this operation. Slide 3 RAMING 3 no sub-code RAMING Drilling to enlarging the diameter of the borehole. Start: with making up the ream or hole opener assembly. nd: when reamer/hole opener bit is returned to surface and laid down. 5 2 Displace 3 1 Back Reaming nlarging and preparing the borehole while pulling the bit out of the hole. 3 2 Reaming Drilling to enlarging the diameter of the borehole. Start: with making up the ream or hole opener assembly. nd: when reamer/hole opener bit is returned to surface and laid down. 4 CORING 4 no sub-code CORING The measurement and analysis of formation and fluid properties through examination of formation cuttings or through the use of tools integrated into the bottom hole assembly while drilling, or conveyed on wireline or drill pipe after a borehole has been drilled. Start: Circulating prior to POOH to core. nd: After drilling out the core rat hole. 4 1 Cut cores 4 2 Retrieve cores from barrel and lay down 5 CONDITION MUD & 5 no sub-code CONDITION MUD & CIRCULAT 5 1 Circulate hole Page 1 of 5
NW NW 5 3 Condition mud 6 TRIPS 6 no sub-code TRIPS 6 1 Tripping with Drill Pipe in Cased hole 6 2 Tripping with Drill Pipe in Open hole 6 3 Washing in Open hole 6 4 Wiper Trip 6 5 Making up BHA 6 6 Running in hole with BHA 6 7 Pulling out of hole with BHA 6 8 Picking up Drill Pipe 6 9 Laying Down Drill Pipe 6 10 Run Cement Stinger 7 LUBRICAT RIG 7 no sub-code LUBRICAT RIG 7 1 Service Drilling quipment 7 2 Service Drawworks 7 3 Perform Caliper Test 7 4 Perform Brake Burn Test 8 RPAIR RIG 8 no sub-code RPAIR RIG 9 CUT OFF DRILLING 9 no sub-code CUT OFF DRILLING LIN 9 1 Slip & Cut drill line 9 2 Install & Slip new Drill Line Spool 10 DVIATION SURVY 10 no sub-code DVIATION SURVY 11 WIRLIN LOGS 11 no sub-code WIRLIN LOGS 11 1 Rig up wireline 11 2 Rig Down Wireline 11 3 Run Wireline 12 RUN CASING & CMNT 12 no sub-code RUN CASING & CMNT Activities directly related to the running and the cementing of the casing. Start: When the bit is returned to the drill floor after TD, or at the end of logging / under-reaming at TD, if these operations were carried out. nd: When the shoe track has been drilled and pocket/rathole has been drilled out, if the shoe track is drilled out. 12 1 Rig up Casing (Tubing) Handling quipment 12 2 Rig down Casing (Tubing) Handling quipment 12 3 Run Casing 12 4 Drive Conductor 12 5 Run Liner Activities directly related to the running of the liner. Start: When the bit is returned to the drill floor after TD, or at the end of logging / under-reaming at TD, if these operations were carried out. nd: When the production liner / final production string is in place, ready for the next operation. 12 6 Set Casing 12 7 Rig up for Cement Job 12 8 Rig down for Cement Job This is often the start of picking up the clean-out string to run in hole to clean out the well-bore and circulating the wellbore fluid to completion fluid. 12 9 Pressure Test Cement Line 12 10 Cement Casing Cut Casing Pump Fluids 13 WAIT ON CMNT 13 no sub-code WAIT ON CMNT The time required for the cement to gain sufficient strength to drillout, or the time required by a regulatory agency after the cement plug is bumped. 14 NIPPL UP B.O.P. 14 no sub-code NIPPL UP B.O.P. Page 2 of 5
NW NW 14 12 1 Cut Casing 14 12 2 Install Casing Head 14 3 Nipple up Diverter 14 4 Nipple down Diverter 14 5 Nipple up BOP 14 6 Nipple down BOP 14 7 Nipple up Bell Nipple 14 8 Nipple Down Bell Nipple 14 9 Run & Set Wear Bushing 14 10 Pull Wear Bushing 14 11 Transport BOP to/ from Moonpool 14 12 Rig up Riser Tensioners 14 13 Install Diverter 14 14 Overpull Test on Wellhead 14 15 Pull Diverter 14 16 Slacken Riser Tensioners 14 17 Rig down Riser Tensioners 14 18 Rig down Surface Lines 15 TST B.O.P. 15 no sub-code TST B.O.P. 15 1 Function Test BOP 15 2 Pressure Test BOP Test Casing Leak Off Test Change Rams 16 DRILL STM TST 16 no sub-code DRILL STM TST 17 PLUG BACK 17 no sub-code PLUG BACK All activities related to a plug back or cement plug. Starts: in most of the cases with rigging up to make up a cement stinger, or pulling out of hole to set a cement plug in case of losses. nds: with the cement plug, where required tagged and tested and the cement stinger laid down. In case where a cement plug has been set to cure losses, the operation finishes once drilling depth has been reached prior to pulling out to cure losses. 18 SQUZ CMNT 18 no sub-code SQUZ CMNT 19 FISHING 19 no sub-code FISHING The application of tools, equipment and techniques for the removal of junk, debris or fish from a wellbore. Starts: Once the decision has been taken to commence a fishing operation, or when it is evident that there is a fish in the hole. This phase can at times start with a trip out of the hole. nds: When resuming operations as carried out prior to the start of the fishing operation at the same depth. A dedicated clean out trip prior to commencing drilling operations would typically still be part of this operation. 20 DIR. WORK 20 no sub-code DIR. WORK 21 RUN/RTRIV 21 no sub-code RUN/RTRIV RISR QUIP. 21 1 Run Riser 21 2 Pick up/ Lay Down Landing Joint 21 3 Preprare to Land BOP 21 4 Land BOP 21 5 Pull BOP 21 6 Retrieve Slip Joint with Landing Joint 21 7 Pull Riser 21 8 Pull LMRP 21 9 Overpull Test on LMRP Connector 21 10 Land LMRP 22 SURFAC TSTING 22 no sub-code SURFAC TSTING 22 1 Pressure Test Choke & Kill Lines on Page 3 of 5
NW NW 22 2 Rig up Surface Lines 22 3 Test Diverter 23 OTHR 23 no sub-code OTHR [unused] 24 no sub-code ABANDONMNT 24 1 Sever & Lay Down Casing 24 2 Set TA Caps/ Net Guard [unused] 25 no sub-code HOL TSTING 25 15 1 Perform FIT 25 15 2 Perform LOT 25 15 3 Pressure Test Casing 25 15 4 Test Well Head Connection [unused] 26 no sub-code NON-PRODUCTIV TIM (NPT) Trouble time or NPT. Start: the point where this is first identified, i.e., the activity is not progressing as planned. nd: Resumption of the activity whereby you are back at the same point where the initial NPT was incurred. 26 22 1 Wait on Weather 26 22 2 Wait on Orders 26 22 3 Wait on Materials/ Service 26 22 4 Wait on Service Company 26 22 5 Trip Interuption 26 22 6 Stuck Pipe 26 22 7 Jarring [unused] 27 no sub-code RIG OFF CONTRACT [unused] 28 no sub-code RIG INSPCTION 28 21 1 Post Jarring Inspection [unused] 29 no sub-code STANDBY 29 1 1 Mobilization 29 1 2 Pre-Operating 29 1 3 DeMobilization 29 22 4 Force Majeur [unused] 30 no sub-code SAFTY 30 21 1 Tool Box Talk 30 21 2 Personnel Training 30 21 3 Clean & Clear Rig Floor 30 21 4 JSA [unused] 31 no sub-code WLL CONTROL Operations applying technology focused on maintaining pressure on open formations, to prevent or direct the flow of formation fluids into the wellbore. Starts: With the first indication of a well control event, often with the start of a positive flow check or when the well is being closed in if no flow check has taken place. nds: When resuming operations as carried out prior to the start of the well control phase at the same depth. 31 15 1 Flow Check 31 15 2 BOP Drill 31 15 3 Shut in on Well 31 15 4 Well Pressure build up 31 15 5 Weighing up Kill Mud 31 15 6 Well Kill with Wait on Weight Method 31 15 7 Bullheading 31 15 8 Diverting [unused] 32 no sub-code COILD TUBING & LOGGING Page 4 of 5
NW NW 32 11 1 Rig up/ down Coiled Tubing 32 11 2 Rig Down Coiled Tubing 32 11 3 Run Coiled Tubing 32 11 4 Logging on Drill Pipe A PRFORATING A no sub-code PRFORATING All operations to perforate the well from rig up to the completion of the rig down, including the time taken for unsuccessful perforating runs. This includes perforating prior to running sand screens either tubing conveyed or wireline, through tubing perforating with the completion installed, and the making up of TCP guns when running in hole with the completion. Start: Rigging up to perforate. nd: when rigging down after all perforating runs have been completed. A 1 Perforating on Drill Pipe All operations to perforate the well on drill pipe, from rig up to the completion of the rig down, including the time taken for unsuccessful perforating runs. Start: Rigging up to perforate. nd: when rigging down after all perforating runs have been completed. A 2 Perforating on Wireline All operations to perforate the well on wireline, from rig up to the completion of the rig down, including the time taken for unsuccessful perforating runs. Start: Rigging up to perforate. nd: when rigging down after all perforating runs have been completed. B TUBING TRIPS B no sub-code TUBING TRIPS C TRATING C no sub-code TRATING A treatment performed to restore or enhance the productivity of a well. Treatments fall into two main groups: hydraulic fracturing treatments and matrix treatments. Start: nd of previous operation. nd: With the completion of the stimulation and equipment rigged down and operations ready to commence the next operation or phase. C 1 Fracking A fraccing treatment performed to restore or enhance the productivity of a well. Start: nd of previous operation. nd: With the completion of the stimulation and equipment rigged down and operations ready to commence the next operation. C 2 Gravel Packing A sand control treatment to prevent the production of sand from the formation while minimally affecting well productivity. Start: nd of previous operation. nd: With the completion of the treatment and equipment rigged down and operations ready to commence the next operation. D SWABBING D no sub-code SWABBING TSTING no sub-code TSTING 1 Rig Up for Well Testing 2 Rig Down for Well Testing 3 Well Testing Start: nd of previous operation. nd: Start of next operation (as defined above), or when the well is ready to hand over to production. 4 Perform Inflow Test F [blank] F no sub-code COMPLTION OTHR F 1 Setting hanger F 2 Nipple Up Well Head F 3 Xmas Tree Operations Operations on the assembly of valves, spools, and fittings used for an oil well, gas well, water injection well, water disposal well, gas injection well, condensate well and other types of wells. The primary function of a tree is to control the flow into or out of the well, usually oil or gas. Start: Tubing hanger, barriers and completion have all been run and satisfactorily tested. For many wells this will be when starting to nipple down BOP. nd: Tree installed and satisfactorily pressure tested and plugs removed. G [blank] G no sub-code [blank] H [blank] H [blank] no sub-code Page 5 of 5