Dash® Large Bore Surface Control Container
As a primary component of the ® large bore electrohydraulic subsea system the large bore surface control container interfaces with the downhole unit, providing control and downhole data acquisition, secondly the unit to provide control and downhole data acquisition, along with a full range of measurements on all surface lines.
The core of the Dash large bore surface control container is an integrated 25-station hydraulic power unit that is designed to control all of the direct hydraulic functions of the Halliburton large bore subsea safety system via a purpose-designed hydraulic umbilical containing dual electrical cables. It also provides the hydraulic supply for the Dash downhole accumulator, which supplies power for emergency functions.
Through the dual electrical cables, the Dash large bore surface control container’s electrical interface provides rapid electrical control of the subsea valves. The emergency shutdown (ESD) and emergency quick disconnect (EQD) functions of the subsea safety system can be initiated at the surface container or by one of the remote ESD panels. The ESD/EDQ logic is customizable to requirements and is determined during the Halliburton Design of Service process, working with the customer and rig safety specifications.
FEATURES
» Provides local and remote live well data display using the Halliburton InSite® data retrieval service and operating system kernel
» Equipped with two remote HMI displays and three ESD/EQD stations
» Zone 1-rated container
» Each hydraulic line has a dedicated pressure transducer and inline-pulse flow meter
» Back-pressure system, including dedicated hydraulic pump that protects umbilical integrity in deepwater and high-riser pressures
» 300-liter stainless-steel reservoir, which has a return and suction chamber that enables clean and plentiful fluid supply
» Three 20-liter accumulators grouped together to provide a single source of additional fluid power, rated at 10,000 psi
» Nitrogen backup purging system in the event of air supply loss
BENEFITS
» Data acquisition service, including real-time and historical logging, can be applied to any subsea safety system or pass-through functions to monitor functionality
» Dash large bore surface control container can complement any system (electrohydraulic, direct hydraulic, subsea safety tree, or spanner joint systems)
» Individual control of each function increases system versatility
» Two contamination sensors within the recirculation and back-pressure lines
» Filtration system provides clean fluid that is compliant with the AS4059 Class 6 standard
» Backup power supply for the container in the event of a power loss
Dash Large Bore Electrohydraulic Control Module
The Dash Large Bore electrohydraulic control module was developed on industry-proven products and is customizable to meet individual customer requirements. While in field development, the system connects the user with the subsea safety system, tubing hanger and completion system, providing critical well control during flow back and production well clean up.The Dash system can utilize smart, redundant electronic controls to perform the emergency well shut-in and landing string disconnect in less than 10 seconds.
The Dash system is a technology that challenges the status quo. It employs the EH features where they really matter most—core safety functions and provides full direct hydraulic control of all safety and intervention functions. Not only does this increase reliability, but offers a simplistic design built for efficient, cost-effective operation and field maintenance.
Through linking with downhole and surface read-out control systems, the Dash system enables calculation of optimal performance to help avoid nonproductive time and offer efficiency during deepwater developments.
Safety and reliability are paramount in deepwater subsea completions and field development; the Dash system can deliver both.
FEATURES
Integrates with 6 3/8-15K and 7 3/8-10K ID equipment
10-second emergency shut-in and disconnect
Under 6-second emergency shut-in
Direct hydraulic controls of safety and intervention functions
Full redundant electrical controls
Real-time monitoring
Compact reconfigurable design
Designed per ISO13628-4, -6, and -7
BENEFITS
Full direct hydraulic redundancy increases reliability
Simplistic design built for efficient, cost-effective operation, and in-field maintenance
Modular design enables adaptability to customer-specific
Interchangeable bore (6 3/8 and 7 3/8) creates a flexible system
Shorter length equates to reduced rig-up time and ease of handling
Uses the Halliburton exclusive, field-proven Kernel software for real-time data acquisition and active tool simulation
Built on field-proven technology platform
Highest external working pressure at 8,000 psi or 10,000 ft at 15.60 lb/gal
Integrated surface and subsurface flow meters enable redundant diagnostic capability and help reduce uncertainty of safety functionality
Real-time, design-of-service, digital validation testing
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