NDT Inspection

The Bathycorrometer® is a well-proven inspection tool for measuring the levels of corrosion on sub-sea structures. Light and easy to use, this hand-held unit enables divers to obtain accurate readings of the corrosion potential levels of structures at the point of contact.

The first Bathycorrometer® unit went into rigorous North Sea service in 1971. Customer satisfaction with the performance of Bathycorrometers® has led to specified use, worldwide. The current model retains the features of the original Roxby unit but with the addition of modern electronics. It can also be connected to a Surface Display Unit (SDU), which provides a top-side verification of readings.

Bathycorrometers® are used for polarisation, corrosion and interaction surveys, in particular as part of the commissioning check or inspection of production and drilling platforms; sub-sea pipelines; ships’ hulls; jetties and other marine works.

Standard Kit (Ref: H1) comprises:
Buckleys Bathycorrometer, battery charger, 6 x hardened stainless steel probe tips, Probe tip spanner, Silicone grease, Zinc and Magnesium test blocks and comprehensive instruction manual, all contained in fitted carrying case.

• Illuminated digital display
• Facility for adding remote monitoring
• Single handed and light
• Simple to use and maintain
• Robust and inert housing
• Suitable for use in deep water – up to 350 metres
• Easily replaceable half cell
• Supplied with calibration certificate
• Kit includes Zinc and Magnesium test blocks

The Cygnus G1 Probe Handler is designed for use on Observation, Inspection and Light-work class ROVs.

Constructed from acetyl with 316 Stainless Steel fixings. Strong and Lightweight the G1 ROV Probe Handler features an adjustable mounting bracket allowing optimum positioning of the UT probe. The UT probe is located in an articulated mount that allows up to 15 degrees of movement in both planes thereby, allowing automatic alignment of the probe face to the measurement surface making the ROV pilot’s job easier.

• Size: 92 mm 116 mm x 166 mm (3.6” x 4.6” x 6.5”)
• Weight:0.3 Kg (0.66 lbs)
• Depth Rating: 2000 msw
• Materials: Acetyl with 316 Stainless Steel Fixings
• Probe Types: 2.25 MHz 13 mm with Membrane (3.5 MHz & 5 MHz at special request)
• Probe Cable: 0.95 m Double Jacket Coaxial (other lengths at special request)
• Warranty (Handler): 3 Years
• Warranty (Probe): 6 Months
• Part Number: 001-8351 Cygnus G1 Probe Handler

The Cygnus Mini ROV Mountable thickness gauge has been specially designed to be mounted onto small observation ROVs with or without a manipulator facility.

• Designed specifically to mount onto small observation ROV’s.
• Supplied with CygLink software to display and log thickness measurements from the ROV on a computer at the surface which can be saved to a file and printed out.
• CygLink has two data logging facilities: Quick Log for simple recording of thickness measurements and Structured mode with four templates available –
• Single Point, Multi Point, Grid Point and Key Point.
• Easy calibration at the surface via CygLink software or Top Side Repeater (TSR) unit.
• Optional dedicated probe holder to allow measurements on curved or flat surfaces.
• Only one twisted pair is required to transfer the data to the surface.

Built in conjunction with VideoRay, this mountable subsea thickness gauge will allow the operator to carry out an ultrasonic thickness measurement in areas that have previously been infeasible using larger ROVs or divers. The multiple echo thickness gauge measures metal thickness and corrosion without removing protective coatings.

Dedicated software displays the time, date and thickness readings on the surface which can all be stored or logged. Alternatively, an optional Topside Repeater (TSR) is available which has the facility to display the thickness measurements remotely and overlay them on to a video signal. This allows the measurements to be superimposed on the ROV camera’s monitor screen.

The unit is pressure tested to 500 m.

Specifically designed for underwater remotely operated vehicles, Cygnus offer two dedicated ROV Mountable thickness gauges, the M5-ROV-2K – 2,000 m depth rated, and the M5-ROV-4K – 4,000 m depth rated.

• Available in two models: M5-ROV-2K 2,000 m depth rated and M5-ROV-4K 4,000 m depth rated.
• The Cygnus Topside Repeater (TSR) is available as an option and has the facility to display the thickness measurements remotely and overlay them on to a video signal. This allows the measurements to be superimposed on the ROV camera’s monitor screen.
• Selectable Deep Coat mode for measuring through coatings up to 20 mm thick.
• Supplied with CygLink software to display and log thickness measurements from the ROV on a computer at the surface which can be saved to a file and printed out.
• CygLink has two data logging facilities: Quick Log for simple recording of thickness measurements and Structured mode with four templates available – Single Point, Multi Point, Grid Point and Key Point.
• The ROV Gauge sends thickness measurement data to the surface via an RS-422 serial link, Cygnus can supply the RS-422 umbilical cable up to 1,200 m in length. For longer distances the ROV Gauge can output data in RS-232 mode.
• Fitted with a safety Pressure Relief Valve and Securing Eye.
• Easy calibration at the surface via CygLink software or Topside Repeater (TSR) unit.
• Removable end plate for full serviceability with access to the Option Switches, Fuse and Status LED.
• Wet mateable ‘MC’ style underwater connectors

These mountable measurement gauges again benefit from the multiple-echo technology found in all our ultrasonic measuring devices. They are truly versatile and designed to measure metal thickness through coatings in the harshest operating conditions.

Dedicated software reveals the date, time and thickness readings on the surface which may be logged or stored. In addition, a Topside Repeater (TSR) is available providing the ability to present the thickness measurements remotely and overlay them on to a video signal. This permits the measurements to be superimposed on the ROV camera’s monitor screen.

The Cygnus Underwater is the original diver held subsea multiple echo Ultrasonic Thickness Gauge. It was designed for use by divers undertaking subsea maintenance and surveys 3 decades ago… and today it is still the industry standard.

The unit is depth rated to 300 metres and it provides an accurate metal thickness measurement through coatings up to 20mm thick. The bright LED display ensures easy viewing even in poor visibility conditions.

The Underwater Thickness Gauge is supplied ready to use as a complete kit with 2 rechargeable batteries in a protective carry case.

• Auto – Probe Recognition (APR)
• “Deep-Coat” mode for measuring through coatings up to 20 mm thick
• Easy calibration using convenient buttons
• Rugged, durable, shock-proof construction
• Stable calibration – linear accuracy – no zero adjustment
• Large bright LED display for poor visibility
• Pressure rated to 300 m depth
• Heavy duty sealed unit with double ‘O’ ring protection
• Remote probe with 0.9 m lead for measuring in awkward locations
• Self verification of measurements to ensure accuracy
• Echo strength indicator to aid measurement
• All probes are protected by a membrane to prevent damage
• Various probe options
• Two rechargeable battery packs with charger
• Fixed head probe option for single handed use

The Cygnus W1 Probe Handler is designed for use on Work Class ROVs. It can be held by a manipulator arm and supplied with either T bar or Fish Tail handles. Constructed from 316 stainless steel throughout, it has a depth rating of 4000 msw.

The Ultrasonic probe alignment is provided by a double jointed coupling that enables 15 degrees of movement in both planes guided by four pins. A shock absorbing spring reduces any impact loading on the unit. The design allows the manipulator arm to present the ultrasonic probe to the surface to be measured. Any misalignment will be taken up by the coupling resulting in less movement of the manipulator arm position.

• Constructed from 316 stainless steel

The Deepwater Polatrak ROV II is the world’s best-selling, general-purpose, tip-contact cathodic-protection probe. The first CP probe manufactured with twin elements, it allows on-line calibration that eliminates time-consuming on-site procedures and greatly reduces user error.

The ROV II probe interfaces easily with the ROV, but can also be held by divers. It serves as either a tip-contact or proximity-style probe. If ROV operators prefer to avoid connection with the umbilical, the ROV II probe can be connected directly to Deepwater’s Deep C Meter readout to make the survey system completely self-contained. The CP potentials are displayed directly on a subsea readout viewable with the ROV’s video camera. Like all Polatrak corrosion probes, the ROV II is fully field-serviceable, with plug-in electrode elements and interchangeable components. No battery is required.

• Twin Ag/AgCl Electrodes
• Proximity or Contact Probe
• Rated to 10,000 fsw (3050 m)
• Diver Held or ROV interfaced

The ISFMD system provides the latest in underwater ultrasonic Flooded Member Detection technology. Suitable for Diver or ROV deployment the ISFMD system provides the most advanced and reliable Flooded Member Detection system available today.

Utilising an ultrasonic probe with a broadband composite transducer together with an advanced digital ultrasonic engine ensures the highest level of accuracy and reliability in readings.

The ISFMD system does not use gamma ray or any other radio active sources. The system is based entirely on the use of ultrasonics. This removes the logistical and health and safety difficulties associated with gamma ray based flooded member detection systems.

An optional ISD4000 depth sensor can be added to the system to automatically record depth of each check point.

All readings are shown visually in the seaView software package. Upon completion of the survey, a full report is automatically generated with readings and user notes.

• Ultrasonic FMD System
• Visualise Acoustic Returns
• Automatic Report Generation
• Powerful & Intuitive Software
• ROV or Diver Operated
• Probe Orientation Sensor
• Titanium Probe

PHINS 6000 is a subsea inertial navigation system (INS) providing position, true heading, attitude, speed, depth, and heave for deep water operations.

PHINS 6000 is a subsea inertial navigation system (INS) providing position, true heading, attitude, speed, depth, and heave for deep water operations. Its high-accuracy inertial measurement unit is coupled with an embedded digital signal processor that runs an advanced Kalman filter. PHINS DVL Ready is pre-assembled and pre-calibrated with a Doppler velocity log version making the system easy to install and ready to use for more precise navigation. 

Features: 

• All-in-one high-accuracy 3D positioning with heading, roll and pitch 
• FOG, unique strap-down technology 
• Multiple aiding available: (DVL, USBL, LBL, RAMSES, GPS, depth sensor)
• Options: DVL or RAMSES coupling 
• Ethernet, web server (GUI) 

 

FlexiCAL is an ROV mounted caliper that allows for direct measurements from point to point with instantaneous readout.

Accurate live measurements give the client the knowledge to make decisions regarding their assets as the measurements are taken. No more post processing!

Results are accurate to ±0.1 mm and highly repeatable. The standard measurement range is 0-550mm, but the caliper can be equipped with extenders and blades tailored to suit the customer need.

The caliper is frequently used for measuring wear and corrosion on mooring chain, but also performs excellently on flanges, plates, structures and any number of other subsea assets.

• Delivers accurate, repeatable, real-time measurements
• Adaptable blades enable measurement of complex geometry
• Results are instantaneous and repeatable to +/- 0.1mm

Miros Oil Spill Detection (OSD) is optimized for both oil spill surveillance and oil spill response delivered as a dual-mode system. Miros OSD is thoroughly verified in oil-on-water exercises and used by major oil operators and authorities around the world.

The OSD Surveillance mode is designed to provide automatic alarms and situational awareness when an oil spill appears on the ocean surface. The system automatically detects oil spills and shows them alongside AIS targets and IR/daylight camera views. Offshore installations and vessels, as well as coastal and port sites, are given early warning capabilities, where data is provided to support response decisions and planning.

Miros OSD in Recovery mode will guide the response vessel towards the part of the oil slick where the highest recovery efficiency is obtained. The thicker part of the oil slick is identified with support of IR and visible spectrum sensors, aiding correct positioning of booms, skimmers and dispersant application.

• Automatic detection with high detection rate and low false alarm rate, day & night
• Up to 8 cameras with 2 video streams each,
• Up to 2 X-band radars
• Historical data with playback mode
• Camera tracking of detections, AIS targets and drift buoys
• Oil drift prediction, AIS targets, wind, current, wave and ice data

Advanced subsea dye detection system. The ROV mounted D7 DyeTector may be used to detect leaks from subsea infrastructure such as manifolds, wellheads or pipelines if a suitable dye has been added to the infrastructure fluids, or during casing cementing operations to detect cement returns.

High intensity LED light is focused through lenses and filters to create a concentrated beam that is tuned to a specific wavelength to cause maximum molecular agitation and fluorescence of the dye. A sophisticated optical multiplier employs light amplification technology to detect even the smallest amounts of fluorescence from the agitated dye molecules. Advanced detection electronics convert the measurements to digital data.

The powerful D7 DyeTector uses technology capable of detecting single photons of light. It can detect down to single digit parts per billion of dye dissolved in water and is approximately one hundred times more sensitive than the human eye. This makes it ideal for detecting the very smallest of leaks or traces of dye dosed cement.

Detection can be carried out at a safe working distance, and the ROV’s lights do not have to be turned off when the DyeTector is in operation.

• ROV mounted D7, with diver held D9 in development
• Rhodamine, Fluorescein or Ultraviolet dye detection
• Focused beam and filtered high intensity LEDs
• Light amplification and photon detection technology
• 6000m depth rating as standard

The INTEGRIcollar is a strain sensor for measuring axial and bending stresses of a pipe structures. It uses the proven and robust displacement sensor technology widely used in the industries. The typical application for includes riser air can up-thrust tension measurement, drilling riser tension measurement and tendon tension measurement.

System configuration

The device is attached to the pipe with two rigid collars that are securely installed around the pipe. Four linear displacement sensors are installed between the collars, allowing the pipe axial strain to be measured. The sensors require tiny force to operate, hence they will not impose heavy load to the collars.

The INTEGRIcollar can be interfaced permanently to the Pulse standard data logging pods for standalone or online recording operations. The device may be also connected to an ROV retrievable using a wet mate ROV connection allowing the logger data to be removed and replaced whilst leaving the INTEGRIcollar connected to the structure. The device relies on the high accuracy, stability and robustness of the non-contact displacement sensors, which are extensively qualified in marine applications. The sensors are hermitically sealed in corrosion resistant alloy materials and are rated to 3000 meters underwater. The robust design coupled with pressure-balanced oil-filling technologies ensures that the can reliably operate for many years without intervention.

Mounting methods

The two halves of the collars of the can be clamped to the riser to anchor themselves to the structure pipe securely. The collars are made from corrosion resistant steel with cathodic protection or coating. The displacement sensor modules are fitted between the two collars. The collars may be also welded to the structure if it is allowed. Forged flanges or bossed collars may also be used if it is preferred. The data logger pods are mounted on the riser using diver or ROV installable brackets.

The INTEGRIpod is a motion sensor with integrated data logger for measuring the movement of subsea structures.

Deployment of loggers
The INTEGRIpod contains all electronics, batteries and sensors enclosed in a pressure rated and corrosion resistant casing. They can be deployed by diver or ROV.

The INTEGRIpod can be set up to communicate in the following ways:

• Standalone – to save data on to on-board memory for later retrieval to achieve off-line monitoring
• Acoustic – to transmit data using a through water acoustic link to achieve real-time monitoring
• Hardwired – to transmit data via umbilical to achieve real-time monitoring

System configuration
A wide range of configurations of the INTEGRIpod are available to meet specific requirements. However, there are a number of standard off-shelf configurations optimised to meet common applications. Typical applications for the INTEGRIpod™ include:

• Vibration monitoring for risers, pipelines and subsea jumpers (VIV and flow-induced vibration)
• Motion monitoring of subsea structures during installation
• Inclination measurement of drilling riser and SCRs
• Motion and tension monitoring of mooring lines

The Pulse INTEGRIstick is a unique patented sensor specifically suited for riser fatigue monitoring where response is dynamic bending dominated. Typical applications include fatigue monitoring in the touch down section of an SCR and the taper joint of a top tensioned riser.

The stick sensor is 19 mm diameter and 500 mm in length and it is attached to the outside surface of a riser. It changes in sympathy with the riser pipe and measures the change in riser curvature in 2 planes allowing local dynamic bending stress to be determined and hence the fatigue damage rate to be calculated.

The INTEGRIstick™ has high accuracy, typically allowing 1 micro-strain resolution (depending on riser pipe diameter). This makes the sensor sensitive enough to capture lowest seastates. This capability is essential for measuring response under day to day current profiles and waves that contribute significantly to damage accumulation.

Uniquely the INTEGRIstick™ is sealed, oil-filled and pressure balanced allowing application at depths up to 3000m. It is manufactured from corrosion resistant materials.

System configuration

The sensor has ultra low power consumption and designed to interface directly to the INTEGRIpod™ for battery-powered standalone or online data logging. The connection between the INTEGRIstick™ and INTEGRIpod™ can be a permanent flange connection, a dry-mate connector or an ROV connector. The connection type will depend on the project specification. The ROV retrievable INTEGRIpod™ using a ROV connector allows the INTEGRIpod™ to be removed and replaced whilst leaving the stick mounted on the riser.

Mounting method

The strain measurement system is compact, ultra lightweight and can be fitted to the riser in a matter of minutes. When fitted with a compact GRP fairing the arrangement provides a highly reliable and robust method for measuring riser bending stresses.

The latest RTS CP System is the complete solution for Cathodic Protection Measurements. The system comprises of a single contact probe with dual electrodes, a subsea CP A/D converter bottle and surface display & logging software.

Online quality control function utilises the differential reading between the two electrodes and activates a built-in software alarm when the electrode is seen to be out of calibration. The dual electrode display software presents real-time online CP readings and has the facility to program the differential alarm and scaling limits.

Easy ROV interface, requiring only one RS232 or 422/485 compatible up link and 24V DC power supply. The surface software can be utilised as a standalone display & logging package or easily interfaced to existing video overlay and logging software systems.

• Easy to implement and use
• Dual Electrode plot for QC
• High Accuracy and Resolution
• Online differential measurement
• Digital link no cable loss
• Display & Logging Software
• Fast 10Hz Sampling Rate
• RS232 and RS485/422 Compatible

The Specialist Offshore Services gas sampling unit combines several safety features to allow users to operate with unknown gases. The sample bottle is rated to 5000 PSI, which allows users to bring samples back from depths as great as 3000MSW. All outlets from the bottle have 2 barriers to protect users.

The hydraulically operated valve ensures that at least one valve cannot be accidentally left slightly open by error or accident. The manual valve is operated by the ROV 7 function manipulator and forms the last barrier on the collection side to protect users. The sample point allows for easy gas extraction and testing without having to use the ROV operated valves.

• Sample Bottle NACE and DOT compliant
• All valves NACE compliant
• 1 hydraulically closed valve, 1 Manually closed ROV valve as standard. Options available on request, such as dual hydraulic valves, or dual ROV manual valves
• 2 barriers of protection from sample bottle, sample side and collection side.
• Separate sample point for easy extraction
• 5 Function and 7 Function manipulator handles
• Standard size 500ml,however custom versions available on request.
• Weight 14kg in air, 12kg in seawater
• Height 970mm x Width x 500mm x Depth 300mm

Specialist Offshore Services Pty Ltd PH probe allows the in situ determination of pH up to a pressure of 600bar, or 6000MSW. The PH sensor is an inner gel electrolyte filled glass tip, with a small hole to allow the measurement of the PH of the unknown solution. This provides a stabilised junction potential allowing a fast response, and accurate measurement. New version has separate optional Temperature probe.

The glass transducer gives long life and minimal re-calibration. The software allows for easy calibration before ROV deployment, as well as an ASCII serial output to interface with typical video overlay systems, meaning the PH can be recorded on screen.

Software provides logging ability, to an ASCII formatted file, for easy importation into popular software packages.

• Operating Depth : up to 6000 MSW
• Measuring principle: potentiometric
• pH Sensor: Glass Membrane
• Temperature Sensor : Ag/AgCl double bridge
• Measuring range: defaults to 3..11 pH
• Expanded range selectable 0..14pH
• Accuracy: pH 0.03
• Redox +/- 10m
• Resolution: 0.01 pH
• Time Constant: t63% < 3s
• Temperature range: -2.. +38 degrees C
• Requires: 0V, 24V, RS232 Tx/Rx/Common
• Probe housing: AISI 316L
• pHSensor body: titanium
• Probe Diameter: 48.5mm