June 2010
All rights reserved

U.S. Patents
6,237,701 and
7,139,219


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
– Well stimulation
2

Valve Open 600
500
400
300
200
100
0
1.4
Valve Closed
1.6
1.8
Time, s
2 2.2
2.4
3

4

Bullhead
Nozzle
HydroPull™
5
Debris
Screen

6
Diameter
(43 mm)
Connected
40.01”
(1016 length mm) with screen sub
Connections 1” AMMT
(54 mm)
43.55”
(1106 mm)
2.88”
(73 mm)
58.70”
(1491 mm)
Design flow rate
1.0 - 1.6 bpm
(160 - 250 lpm)
11/2” AMMT
1.2 - 1.8 bpm
(190 - 290 lpm)
2-
3/8” PAC-DSI
(mod)
2.5 - 3.5 bpm
(400 - 550 lpm)
Average pressure differential
360
– 720 psid
(2.5 – 5.0 MPa)
360
– 720 psid
(2.5 – 5.0 MPa)
300 - 500 psid
(2.2 – 3.5 MPa)
Pulse cycle rate
8
– 12 Hz
10
– 15 Hz
6
– 12 Hz
Traction force
1300 – 2000 lbf
(600 – 900 daN)
2300 – 3000 lbf
(1000 – 1300 daN)
2200 - 3200 lbf *
(1000 - 1400 daN)
* Standard tool configuration; High- and Low-Impact configurations also available

Sour gas
Max. temperature
Fluid compatibility
Gas compatibility
All H
2
S compatible materials
400 °F (200°C)
Clear fluids: water, 1% acid, 3% KCl, scale dissolvers, frac oil
28% acid capable tools are available in the
1.69” and 2.13” sizes
Multiphase with fluid: air, carbon dioxide, nitrogen
7

HydroPull
Flow in Coil
Motor & Mill
8
1500 psi Water Hammer Pressure Pulse
100 ft
20 ms Coil Strain Pulse
340 ft
Valve Closed 20 ms
Advance 1 inch
Valve Open 80 ms
Advance 1 inch

 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 850 ft at 1.6 bpm, 10 ft/min
– Placed solvent for overnight soak
– Reentered well to TD with HydroPull™
– Lifted with commingled nitrogen/water
 Lateral range extended by 850 ft (35%)
– Another 300-600 ft possible
9

10
Predicted Lockup
7220-ft MD
8070-ft TD with
1.69 HydroPull™
1.6 bpm
10 ft/min feed

Localized Acid Squeeze Pulse
3. Valve Opens -
Releasing Pressure Pulse
60-m
2. Valve Closed, Pressure Builds in Coil
30-m
1. Valve Open
20-ms Acid Pulse 500-600 lpm
Valved Closed 20 ms
Acid Squeezed into Formation
Re-Establish Flow
250-300 lpm Acid
Valve Open 80 ms
11







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
12



5 Well Program for Devon (McAlester, OK)
– 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™ /MGS™/Motor/Mill: 8 min/plug, surface vibration 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
MGS™
HydroPull™
13




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
14


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
15

Annulus Flow
HydroPull
16
Suction Pressure Pulse
Valve Closed

 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
17