““Unusual InterventionsUnusual Interventions””

Jenna Robertson

ICOTA Canada Roundtable October 14, 2010

OutlineOutline

Introduction Introduction The use of “Unusual Intervention” The use of “Unusual Intervention”

methods to resolve complex well bore methods to resolve complex well bore scenarios.scenarios. Abrasive CuttingAbrasive Cutting Abrasive PerforatingAbrasive Perforating Abrasive SlottingAbrasive Slotting

Case HistoriesCase Histories BHA Design used to execute these BHA Design used to execute these

operationsoperations Abrasive Job Requirements & ProceduresAbrasive Job Requirements & Procedures

Abrasive CuttingAbrasive Cutting Special Port Positioning for directing an abrasive Special Port Positioning for directing an abrasive

fluid jet stream into the ID of the pipe to be fluid jet stream into the ID of the pipe to be severed.severed.

Abrasive fluids combined with a down hole Abrasive fluids combined with a down hole motor create a complete cut of the tubular. motor create a complete cut of the tubular.

The abrasive fluids penetrate and severe the The abrasive fluids penetrate and severe the tubing where the jet stream makes contact.tubing where the jet stream makes contact.

Results in a clean cut without any flaring of the Results in a clean cut without any flaring of the tubular.tubular.

Abrasive CuttingAbrasive Cutting

Abrasive Cutting Case Abrasive Cutting Case HistoriesHistories

Coiled Tubing stuck in holeCoiled Tubing stuck in hole Cut at surface, rigged in 1-1/2” CTCut at surface, rigged in 1-1/2” CT Abrasively Cut 2-3/8” CT down hole – removed Abrasively Cut 2-3/8” CT down hole – removed

string from well.string from well.

Fish Hanging String w/ Internal Capillary Fish Hanging String w/ Internal Capillary LinesLines Utilize a modified Flat Catch Overshot – Utilize a modified Flat Catch Overshot –

capable of cutting CTcapable of cutting CT 2” CT has been tested in OKC, currently working on 2” CT has been tested in OKC, currently working on

a test of 1-1/2” CT with 2 x 3/8” internal capillary a test of 1-1/2” CT with 2 x 3/8” internal capillary lines.lines.

Cut Hanging StringCut Hanging String Currently designing an Abrasive Cutting assembly to cut Currently designing an Abrasive Cutting assembly to cut

a 1-1/2” CT hanging string 10-12” below tubing hangera 1-1/2” CT hanging string 10-12” below tubing hanger

Cut 4-1/2” Non-Magnetic Drill CollarCut 4-1/2” Non-Magnetic Drill Collar Passed thru 50.8mm ID JarPassed thru 50.8mm ID Jar Utilizing 1-1/2” CT w/ 1.95” Cutting HeadUtilizing 1-1/2” CT w/ 1.95” Cutting Head Complete the cut in 60min.Complete the cut in 60min.

Abrasive Cutting Case Abrasive Cutting Case HistoriesHistories

Abrasive PerforatingAbrasive Perforating The Abrasive Perforating System, The Abrasive Perforating System,

allows multiple perforations to be allows multiple perforations to be made in the same trip in the hole.made in the same trip in the hole.

Custom tool designs available (ie: Custom tool designs available (ie: phasing, length, nozzle size)phasing, length, nozzle size)

Alternative to conventional methods:Alternative to conventional methods: Tubing Conveyed Perforating (TCP)Tubing Conveyed Perforating (TCP) Wireline deployed perforatingWireline deployed perforating Mechanical Tubing CuttersMechanical Tubing Cutters Chemical & Explosive Tubing CuttersChemical & Explosive Tubing Cutters

Successful in perforating drill collars, Successful in perforating drill collars, drill pipe and multiple casing strings drill pipe and multiple casing strings in a single trip.in a single trip.

Abrasive PerforatingAbrasive Perforating

Motor HeadAssembly

OrientingSub

AbrasivePerforator

Swivel

Wash Nozzle

Abrasive PerforatingAbrasive Perforating

Abrasive PerforatingAbrasive Perforating

Perforate thru 114.3mm Casing Perforate thru 114.3mm Casing encased in shale rock and encased in shale rock and cementcement

27” + Penetration27” + Penetration

Abrasive Perforating TestAbrasive Perforating Test

Abrasive Perforating Case Abrasive Perforating Case HistoriesHistories

Casing LeaksCasing Leaks Multiple wells with casing leaks that Multiple wells with casing leaks that

need to be squeezed offneed to be squeezed off Dual horizontal cuts with a motor Dual horizontal cuts with a motor

followed by perforating multiple followed by perforating multiple setting between the cuts, utilizing a setting between the cuts, utilizing a piston perforator.piston perforator.

Entire procedure completed in a Entire procedure completed in a single tripsingle trip

Abrasive SlottingAbrasive Slotting The Abrasive Slotting Assembly utilizes a planar The Abrasive Slotting Assembly utilizes a planar

perforator perforator The # of jets can be altered, allowing a variety in phasing. The # of jets can be altered, allowing a variety in phasing.

Slotting can be completed in multiple stages and Slotting can be completed in multiple stages and

various lengths, simply by adjusting your work various lengths, simply by adjusting your work string in the hole.string in the hole.

The planar perforator can be combined in a BHA The planar perforator can be combined in a BHA with a cutting head to form “Coupon” cut-outs with a cutting head to form “Coupon” cut-outs within the tubular of interestwithin the tubular of interest Beneficial for damaged casing, testing purposesBeneficial for damaged casing, testing purposes

Abrasive SlottingAbrasive Slotting

Planar Perforator

Abrasive Slotting Case Abrasive Slotting Case HistoriesHistories Uranium Mine flooded with waterUranium Mine flooded with water

Relief wells were drilled and cement squeeze Relief wells were drilled and cement squeeze performedperformed

Subsequent water influx still present – drill 4 wells Subsequent water influx still present – drill 4 wells and install down hole pumps to remove excess waterand install down hole pumps to remove excess water

Abrasively Slot casing to accommodate extra volume Abrasively Slot casing to accommodate extra volume of water required to operate pumps.of water required to operate pumps.

Parted Casing in steam injection wellParted Casing in steam injection well Perform 6 – 48” Vertical cuts between upper and Perform 6 – 48” Vertical cuts between upper and

lower radial cuts.lower radial cuts. Create “coupons” that will fall in and be fished out Create “coupons” that will fall in and be fished out

later.later. Modified an Abrasive Cutting Head to accommodate the Modified an Abrasive Cutting Head to accommodate the

High Tech Rare Earth Magnet – resulting in the “coupons” High Tech Rare Earth Magnet – resulting in the “coupons” being retrieved on the same trip.being retrieved on the same trip.

Multilateral Jetting w/ Slotted Multilateral Jetting w/ Slotted WindowsWindows

Generate 8 x 18” vertical slotsGenerate 8 x 18” vertical slots Shift piston & Reposition tool Shift piston & Reposition tool stringstring Perform 4 horizontal cuts Perform 4 horizontal cuts (upper and lower) between the (upper and lower) between the slottingslotting

Create 4 x 2.50” ‘windows’ w/ casing Create 4 x 2.50” ‘windows’ w/ casing between between

Maintaining casing integrityMaintaining casing integrity Install a whip stock through the windowInstall a whip stock through the window

31.75mm CT out to high pressure jet the formation31.75mm CT out to high pressure jet the formation

Abrasive Slotting Case Abrasive Slotting Case HistoriesHistories

Abrasive SlottingAbrasive Slotting

Resulting in:Resulting in: 4 windows4 windows

2.5” Wide2.5” Wide Casing Integrity Casing Integrity

IntactIntact Whipstock CapableWhipstock Capable

Abrasive Requirements & Abrasive Requirements & ProcedureProcedure

Coiled Tubing or Threaded PipeCoiled Tubing or Threaded Pipe Fluid Pump Fluid Pump

Minimum Pump Rate 80L/min per nozzleMinimum Pump Rate 80L/min per nozzle 100 Mesh Sand Slurry 100 Mesh Sand Slurry

Mixed 100kg/mMixed 100kg/m33 – 120kg/m – 120kg/m33

ID / Weight of tubular will determine cutting timeID / Weight of tubular will determine cutting time # Nozzles per cutting tool – increase flow rate# Nozzles per cutting tool – increase flow rate Continue pumping sand slurry until cut is complete.Continue pumping sand slurry until cut is complete.

*** Each job scenario is different, we use the above as *** Each job scenario is different, we use the above as guidelines***guidelines***

QuestionsQuestions??