The Island Patriot Vessel
Designed to stimulate the world's biggest wells in a single mobilisation
Carrying Capacity
Capable of carrying 2,500,000 lbs of proppant, the vessel has been built to complete the majority of horizontal, multi-zone propped fracture treatments in a single mobilisation. Freshwater capacity is in excess of 400,000 usg with ship-to-ship or installation-to-ship transfer equipment incorporated for infield loading. Fully loaded with proppant, she can carry 350,000 usg 3% KCI water and all additives required for a typical 5 zone campaign, reducing the need to return to shore-base for mid campaign reloads.
Acid Stimulation
An acid-carrying capacity of 160,000 usg 34% HCI allows the vessel to effectively pump 195,000 usg 28% or 380,000 usg 15% HCI in one mobilisation. The aft proppant tanks have been designed to be removed if necessary, allowing the vessel acid-carrying capacity to be effectively doubled. With a large liquid additive carrying capability, coupled with additional back-deck storage, very large acid campaigns are routinely performed without the need for multiple returns to shore-base.
Proven Stimulation Equipment
The Island Patriot uses Stewart & Stevenson’s range of state-of-the-art proven fracturing equipment and comprise 7 x SPM TWS 2250 high pressure pumps, a Model MS-60-SS, 60 bpm automatic density skid mounted blender and 24 x chemical additive units. Total HHP is 14,000, independent of ship’s power with a maximum pump pressure currently set at 11,400 psi. All StimWell HP iron is rated at 15k and the pumps can be converted to 15k service with little effort.
Continuous Improvement
Dedicated to the continuous improvement of the vessel and its systems, the Island Patriot has seen a number of improvements since her introduction in 2010, allowing StimWell to maintain its position as a leading stimulation service provider. Notable additions since the vessels inception include:
- Installation of a bulbous bow and an additional bow tunnel thruster, raising the vessel’s Environmental Regularity Number (ERN) to 99/99/99/98, and resulting in a marked improvement in station keeping abilities. The vessel is capable of operating in the toughest conditions, offering our clients the benefit of a significant reduction in non-productive time.
- Addition of a 7th SPM TWS 2250 high pressure frac pump (skid mounted for additional flexibility), providing 14,000* HHP and 15,000** psi working pressure.
- Installation of a new, purpose built, fully integrated, GOES fracturing control system
- Installation of a new, custom developed treatment monitoring software, allowing customers to monitor jobs remotely and in real time
* Independent of ships power
** 10k standard, 15k adaptable (fluid ends in stock)
Marine
General (P105)
Class: DNV Stimulation Vessel
Flag: Norway
Owner: Island Offshore
Yard: Ulstein Verft (2005)
Dynamic Positioning System (DP 2)
2 off Wind Sensor
2 off Motion Reference Unit
2 off Veripos DGPS
1 off Radascan
Reference System
1 off Cyscan Reference System
ERN 99,99,99 & 98
Main Particulars
Length Overall: 86.2m
Breath Moulded: 19.0m
Depth Main DeckL: 8.0m
Max Draft: 6.65m
Deadweight at 6.65m: 4844 T
Machinery System
Main Engines: 4 Main Engines 10,340 BHP
Bow Thrusters: 2 x 1,200 HP Tunnel, 1 x 1,200 HP Azimuth
Stern Thrusters: 2 x 3,400 HP Azipull
Generators
Main Generator: 4 x 1,825 eKW
Emergency Generator: 1 x 215 KW
Anti-Rolling System
Two ea Passive Stabilizing Tanks
Deck Machinery
Work Crane: 1 x SWL 1.5T @ 15 m
Satellite
1 pff SEV-SAT IP 128 kb/sec
2 off Satcom C. Part of GMDSS
Accommodation
Number of Persons: 36 single cabins
Marine Tankage
Freshwater: 112,000 usg+
Fuel Oil: 350 m3
Seakeeping
Expected 4m significant wave & 35 knot wind
Stimulation
Operational Specifications
Designed to operate in all areas of the world
Treatment Pumps
Hydraulic Horsepower (HHP) 14,000*1
7 x SPM TWS 2500: 6 ea 5″ , 1 ea 4″
Max. Rate
(bpm): 70
Max Pressure (psi): 15,000 *2
*1Independent of ships
power
*210K standard, 15k adaptable, fluid-ends in stock
Treating Iron
2 ea 4 inch ID 15K 400 ft Coflexip hoses
2 ea Emergency Quick Disconnect
Anson 15K treating
iron
Nitrogen (skid-units on demand)
Maximum Nitrogen Rate: 6,000 scf/min
Maximum Storage: 1,440,000 scf
Blending System
Stewart & Stevenson MS-60-SS Blender
Acid Service Rate: 60 Bpm
Proppant Blending Rate:
60x BPM @ 12 pps
Max. Proppant input: 20,000 lb/min
Max. Discharge Density: 20 ppg
Storage Capabilites
36% HCL: 160,000
Liquid Gel Equiv.: 2.5 MM gal 40 lb gel
Hydration Tank (usg) 25,000
Dry Additives: 2 ea 12 m3, 2 ea 9 m3
Liquid Additives (usg): 8,960 in 16
tanks, 18 pumps
Heavy Brine Storage (usg): 50,000 +
Freshwater Storage (usg): 430,000
(w/full acid load)
Proppant Capacity (lbs): 2,500,000*1
Liquid Nitrogen (MMscf):
up to 1,440,000 sf*2
*1coated ISP
*2On demand (skid
unit)
Stimulation Control
Computerised data logging/processing in real-time
Data Acquisition – S&S Accufrac &
Myers
Fracture Design software – NSI Stimplan
Ship-to-shore computer communications