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					Well Intervention Tool Review

           May 2010
                                                                                2


HydroPull™ Water Hammer Valve
               Self-piloted flow cycling valve generates water
                       hammer pulses that vibrate the coil
                  Features
                   –   Pulls coil into the well
                   –   Enhances weight transfer while milling
                   –   Low pressure differential – under 300 psi
                   –   Compatible with motors, jetting tools or logging tools
                   –   Compact length
                   –   Nitrogen compatible
                   –   High-temperature
                  Benefits
                   –   Extends coil reach
                   –   Faster milling when weight is limited
                   –   Faster hole cleaning – shorter wash time
U.S. Patents
 6,237,701         –   Well stimulation
    and
 7,139,219
                                        3


1.69-inch HydroPull™ Kit

                           HydroPull™
   Bullhead
    Nozzle




                            Debris
                            Screen
                                                                                   4


HydroPull™ Specifications
    Diameter              1.69"                         2.88”

  Connected length        17.51”                        29.35”

                                             Standard                Hi-Flow
  Design flow rate     1.0 - 1.5 bpm
                                          2 .5 - 3.0 bpm          3.0 - 3.5 bpm

                     1.5” Coiled Tubing       2” CT                  2” CT
  Pulse amplitude
                      1000 - 1700 psi     1500 - 1800 psi        1800 - 2100 psi


  Average pressure
                      360 - 720 psid      590 - 850 psid         590 - 800 psid
     differential


   Traction force     1300 - 2000 lbf     3300 – 4000 lbf        4000 - 4800 lbf


  Pulse cycle rate       8 - 12 Hz          6 – 12 Hz               6 - 12 Hz
                                                                  5


High Temperature Multi Fluid

    Sour gas              All H2S compatible materials

      Max.
                                 400°F (200°C)
   temperature

                   Clear fluids: water, 1% acid, 3% KCl, scale
      Fluid                      dissolvers, frac oil
   compatibility   28% acid capable tools are available in the
                                     1.69” size

      Gas           Multiphase with fluid: air, carbon dioxide,
   compatibility                    nitrogen
                                                                                                                    6


Acid Pulsing
                             Localized Acid Squeeze Pulse

    3. Valve Opens -                                 60-m

       Releasing Pressure Pulse




                                                                       20-ms Acid Pulse 500-600 lpm




    2. Valve Closed, Pressure Builds in Coil                    Valved Closed 20 ms




                                              30-m




    1. Valve Open                                           Acid Squeezed into Formation




                                                                                                Re-Establish Flow

                 250-300 lpm Acid
                                                              Valve Open 80 ms
                                                                 7


Cycling Valve vs Fluidic Oscillator
  HydroPull™ Cycling               Fluidic Oscillator
        Valve
Valve opens and closes     Continuous flow diverted
interrupting fluid flow.   between adjacent ports
Pressure pulses 60-m of    At 500 Hz the pulse wavelength
wellbore.                  is 3-m.
                           The ports are only a few
                           centimeters apart.
                           The pulses interfere destructively.
                           The pulse amplitude on the
                           borehole wall is minimal.
                                                                                8


Pulse Tool Comparison
                     Tempress Halliburton                      Baker
                     HydroPull™          Pulsonix             Vortech
Type                  Cycling Valve    Fluidic Oscillator   Fluidic Resonator

Flow Rate             1.6 – 1.9 bpm        1.0 bpm              1.1 bpm
Operating Pressure   840 – 1220 psid       2000 psid             75 psid
Rate                     10 Hz           400-500 Hz              200 Hz
Pulse Power              10 kW            < 100 W ??            15 W ??
Effective Range           60-m             < 0.01-m               2-m
MultiPhase?               Yes                 No                   No
Acid                      Yes                 Yes                 Yes
Extended Reach?           Yes                 No                   No
                                                                    9


Extended Reach Stimulation
   2 Wells in Husky Heavy Oil Field (Lloydminster AB)
   1.69-in diameter HydroPull™ on 1.5-inch coiled tubing
   Bullnose nozzle
   Well #1: 1970-ft horizontal with 7-in liner
     –   Previous attempts stopped by obstructions below 3100 ft
     –   HydroPull™ run on1.3 bpm produced water with 15% solvent
     –   Reached TD at 10 to 30 ft/min
     –   Oil production increased from 44 bpd to 600 bpd
   Well #2: 2950-ft horizontal with 5.5-in liner
     – Placed 50 cu-m water with 3% KCl and 2% MudSol
     – Ran in at 10 to 20 ft/hr
     – Production increased from 25 to 44 bpd
   Stimulation operations are ongoing
                                                 10


Extended Reach Cleanout
 Apache    CO2 Injection Well Williston Basin
   – 6.1-in dia. 3300-ft horizontal openhole
 Objective:   run to TD with 1.5-in coil
   –   RIH at 1.3 bpm, 20 to 30 ft/min
   –   RIH Final 1000 ft at 10 ft/min
   –   Placed solvent for overnight soak
   –   Reentered well with HydroPull™
   –   Lifted with commingled nitrogen/water
 Lateral   range extended by 690 ft (21%)
   – Another 300-600 ft possible
                     11


Extended Reach


     Predicted
   Lockup 2200-m



   2460-m TD with
     HydroPull™
    3.5 m/min feed
                                                                             12


HydroPull™ Extended Reach Action
  Flow in Coil                                  HydroPull
                                                            Motor & Mill




                                                   100 ft
        1500 psi Water Hammer Pressure Pulse                 Valve Closed 20 ms



  20 ms Coil Strain Pulse                                   Advance 1 inch
                                       340 ft



                                                            Valve Open 80 ms



                      Advance 1 inch
                                                               13


Arkoma Shale Wells
   5 Well Program for Devon (McAlester, OK)       MGS™
     – 3.25 bpm with 0.5 bpm bypass though MGS
     – 5500-ft, 5.5” horizontals, MD 13,000-ft
     – 8 plugs in each well
     – 2.88-inch diameter BHA, Tricone mill
     – MGS™/Agitator/Motor/Mill: 40 min/plug      HydroPull™
     – HydroPull™ /MGS™/Motor/Mill: 8 min/plug,
       surface vibration was too intense
     – MGS™/HydroPull™/Motor/Mill: 15 min/plug,
       surface vibration OK,
     – 2 plugs milled with nitrogen & water
   Other Successful Jobs
     – SEECO (Southwest Energy)
     – Ultra Resources
                                                                          14


Marcellus Shale Wells
   5 Well Program for Talisman (Marcellus Shale, NY)
     –   5000 to 6000-ft, 5.5” horizontals, MD 12,000-ft
     –   Horizontal inclined up to 95 degrees
     –   High wellhead pressure and sand flow on last HydroPull™ well
     –   13 to 15 plugs in each well
     –   2.88-inch diameter BHA: HydroPull/Motor/Mill 2.7 bpm
   31 plugs milled with HydroPull / 37 milled with beads and chemicals
     –   Plug milling time in heel of well reduced from 60- to 36-min.
     –   Plug milling time in toe of well reduced from 147- to 36-min
     –   Eliminated high cost of beads and friction reducing chemical
     –   Operator “very impressed with tool”
   Tool issues
     – Bladed bits produce oversize cuttings when run with HydroPull™
          » Use FB instead of Dragtooth mill
     – Coil bulge and wear in tapered coil
          » Avoid tapered coil
          » Cut coil if the kink is bad.
     – O-ring failure in disconnect
          » Tools must be in good condition
                                                         15


Milling Case History Summary
     HydroPull™ enhances weight transfer while
      milling
      – Large reductions in plug milling time
      – Most improvement at the toe of the well
      – Outperforms NOV Agitator
      – Eliminates high cost of friction reducing beads and
        chemicals
      – Works with nitrogen and Motor Gas Separator (MGS™)
     Tool is reliable
      – Care is required with coil connections
      – Use less aggressive bits
                                                            16


Damage Removal/Cleanup
     Annulus Flow

                                             HydroPull




                    Suction Pressure Pulse



                                             Valve Closed
                                                                           17


Applications
    Extended Reach Bridge Plug Milling
     – More than 6000 ft is possible with 2” coil
     – Upper limit is not known
    Extended Reach Well Stimulation
     – Solvent or chemical placement
     – Acidizing with 1.69-in Hastelloy tool or with a circulating valve
    Other
     –   Fishing
     –   Valve milling
     –   Gravel pack placement
     –   Ceramic disk removal
     –   Cementing
     –   Coiled tubing drilling

				
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posted:10/8/2011
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