CorrOcean

CorrOcean Srl is the Italian subsidiary of Roxar ASA, its office is based in Rome, Italy and covers the following market areas: Italy, North Africa, Middle East, China, India and Pakistan.

CorrOcean is a company specialized in the supply of corrosion monitoring instrumentation offering a complete range of products and services to the Oil and Gas industry, offshore as well as onshore. The company has acquired the reputation of being a market leader in its area of technology.
Besides traditional and proven technology, the company is strongly engaged in the research and development of new technology aimed at safety and cost efficient solutions to existing problems. CorrOcean Srl is certified ISO 9001:2008.

Corrosion Monitoring

Hydraulic System

Hydraulic access fitting

Hydraulic access fitting

The CorrOcean hydraulic access system has several advantages over traditional mechanical systems. The small size, low weight retrieval tool requires far less operational clearance and has no external moving parts for increased safety. The hydraulic access fitting assembly comprises:

  • Hydraulic Access Fitting (with Locking Pins)
  • Hydraulic Hollow/Solid Plug (data sheet 104)
  • Hydraulic Cover (data sheet 108)
Hydraulic access fitting 10,000 psi

Hydraulic access fitting 10,000 psi

The hydraulic access and retrieval system has several advantages over traditional mechanical systems:

  • Increased personnel safety during retrieval operations
  • No internal threads in the hydraulic access fitting, reducing the possibility of stuck probes or damage to the fitting
  • Less clearance space required for retrieval operations

The hydraulic access fitting assembly consists of:

  • Hydraulic Access Fitting (with Locking Pins)
  • Hydraulic Hollow/Solid Plug
  • Hydraulic Cover

The double acting hydraulic retriever is described in data sheet 110. The 690 bar/10,000 psi access fittings must be operated with 690 bar/10,000 psi hydraulic retrieval equipment. Fittings should be mounted a minimum of 300 mm apart and 200 mm away from other pipe objects to allow for retrieval operations.

Hydraulic/Mechanical covers

Hydraulic/Mechanical covers

Mechanical covers are used to protect the ACME threads of the access fitting from mechanical and environmental damage. The cover for the hydraulic access system is also designed to hold the probe in position inside the access fitting.

Hydraulic plugs

Hydraulic plugs

CorrOcean offers a complete range of hydraulic access fitting assemblies for installation of corrosion probes and weight loss coupons. The access fittings are designed to be used with CorrOcean’s patented hydraulic retrieval tools under full operational pressure. The hollow and solid plugs carry the pressure seal in the access fitting, and are also the retrievable carrier for the monitoring device. The hydraulic hollow and solid plugs are of a unique design with no external threads. The design eliminates galling, which is a common problem with traditional threaded plugs. The hydraulic access fitting assembly comprises the following components:

  • Hydraulic Access Fitting body (See data sheet 103)
  • Hydraulic Hollow/Solid Plug
  • Hydraulic Cover, standard or pressure retaining) (See data sheet 108)
Hydraulic adapters

Hydraulic adapters

The hydraulic access and retrieval system has several advantages over traditional mechanical systems:

  • Increased personnel safety during retrieval operations.
  • The absence of internal threads in the hydraulic access fitting reduces the possibility of probes seizing up or damage to the fitting.
  • Requires less clearance space for retrieval operations.
Hydraulic Retrieval tool

Hydraulic Retrieval tool

 The hydraulic access and retrieval system has several advantages over traditional mechanical systems:

  • Increased personnel safety during retrieval operations
  • No internal threads in the hydraulic access fitting, reducing the possibility of stuck probes or damage to the fitting
  • Less clearance space required for retrieval operations

The hydraulic access fitting assembly consists of:

  • Hydraulic Access Fitting (with Locking Pins)
  • Hydraulic Hollow/Solid Plug
  • Hydraulic Cover

The double acting hydraulic retriever is described in data sheet 110. The 690 bar/10,000 psi access fittings must be operated with 690 bar/10,000 psi hydraulic retrieval equipment. Fittings should be mounted a minimum of 300 mm apart and 200 mm away from other pipe objects to allow for retrieval operations.

Hot Tap Kit

Hot Tap Kit

 The CorrOcean Hot Tap Kit, is designed to provide a means of adding the Access System to any pipeline or vessel already on stream - without shutdown and without product loss. Access Fitting locations be planned for during the original design stage of the project, and installation performed prior to flow operations. However, the Hot Tap offers a safe, reliable method of trepanning a clean hole into the pipe vessel when access is desired or required later, when it is impractical to shutdown. In use, the Access Fitting Assembly is selected and the fitting welded into place on the pipeline or vessel. The Hot Tap Hollow Plug Assembly, together with the selected cutter, is inserted into the Access Fitting Body. The cutter shaft of the Hot Tap is rotated clockwise to trepan a hole of the same diameter as the Access Fitting Body bore. A hand operated ratchet, adjustable wrench, or low RPM motorized power may be used. With the use of another component of the Kit, the Chip remover Assembly excess cuttings can be removed and retained after trepanning. (Carbon Steel Pipe only). Hot Tap Cutters are supplied in two styles; 4-tooth Cutter recommended for wall thickness in excess of 5/16" (7.938mm); and 6-tooth Cutter for thinner pipe walls through 5/16". Normally, the entire operation can be safety completed in approximately 20 minutes. When trepanning is completed, the plug assembly containing the slug is removed by use of the Retriever and Service Valve. The Magnetic Swab Assembly, which is also included in the Hot Tap Kit, is then used to remove any excess cuttings, thereby leaving a clean hole. While the Service Valve and Retriever are still in place, a Solid or Hollow Plug Assembly with any equipment or special tools may be installed for corrosion monitoring or prevention. Hot Tapping can be performed safely with pressure up to 250 bars (3600PSI) and temperatures to +121°C (250°F). When under pressure, the Hot Tap Plug must be removed only in conjunction with the retriever and service valve hook-up. Hot Tap Kits include all equipment necessary to accomplish the hot tapping procedure; Magnetic Swab, Chip remover, and Hydrostatic Test Assemblies, as well as an ample supply of spare parts. The entire Kit is packed in a heavy duty field service box for easy portability and storage. Hot Tap Kits are in use around the world-from the North Sea to the Middle and Far east. The Hot Tap requires little special care and maintenance other than that given any precision tool. The cutters can be resharpened for longer life. The number of cuts depends on the hardness of the steel to be cut, and on the rate of feed while trepanning.

Mechanical System

Mechanical Retrieval Tool

Mechanical Retrieval Tool

The CorrOcean Retriever is a precision tool which allows safe, easy insertion and removal of various equipment and tools through a CorrOcean Systems Access Fitting – while the pipeline or vessel is under pressure. Used in conjunction with a CorrOcean Service Valve, the tandem hook-up is designed to allow line working pressure to slowly bleed pressure into the retriever inner assembly as the plug assembly moves off its seat in the Access Fitting Body. The resulting balanced pressure allows easy insertion and retrieval under full operating pressures up to 420 bars.

Access Fitting

Access Fitting

CorrOcean offers a complete range of access fitting assemblies for installation of corrosion probes and weight loss coupons. The product range comprises both the traditional 2" (mechanical) system as well as CorrOcean’s patented 2" hydraulic access system (see data sheet no 103). The body of the mechanical access fitting has an ACME threaded outlet, to mate with standard service valves for traditional retrieval tools. It can be supplied with configurations for flareweld, buttweld, socketweld, NPT and flanged installation. Mechanical access fittings are also available as Tee-type access fittings for use with injection and sampling equipment.

Hollow and Solid plugs

Hollow and Solid plugs

CorrOcean offers a complete range of access fitting assemblies for installation of corrosion probes and weight loss coupons. The access fittings are designed to be used with retrieval tools under full operational pressure. The mechanical access fitting assembly comprises the following components:

  • Mechanical Access Fitting body (See data sheet 101)
  • Mechanical Protective Cover (See data sheet 101)
  • Mechanical Hollow /Solid Plug
Hot Tap Kit

Hot Tap Kit

The CorrOcean Hot Tap Kit, is designed to provide a means of adding the Access System to any pipeline or vessel already on stream - without shutdown and without product loss. Access Fitting locations be planned for during the original design stage of the project, and installation performed prior to flow operations. However, the Hot Tap offers a safe, reliable method of trepanning a clean hole into the pipe vessel when access is desired or required later, when it is impractical to shutdown. In use, the Access Fitting Assembly is selected and the fitting welded into place on the pipeline or vessel. The Hot Tap Hollow Plug Assembly, together with the selected cutter, is inserted into the Access Fitting Body. The cutter shaft of the Hot Tap is rotated clockwise to trepan a hole of the same diameter as the Access Fitting Body bore. A hand operated ratchet, adjustable wrench, or low RPM motorized power may be used. With the use of another component of the Kit, the Chip remover Assembly excess cuttings can be removed and retained after trepanning. (Carbon Steel Pipe only). Hot Tap Cutters are supplied in two styles; 4-tooth Cutter recommended for wall thickness in excess of 5/16" (7.938mm); and 6-tooth Cutter for thinner pipe walls through 5/16". Normally, the entire operation can be safety completed in approximately 20 minutes. When trepanning is completed, the plug assembly containing the slug is removed by use of the Retriever and Service Valve. The Magnetic Swab Assembly, which is also included in the Hot Tap Kit, is then used to remove any excess cuttings, thereby leaving a clean hole. While the Service Valve and Retriever are still in place, a Solid or Hollow Plug Assembly with any equipment or special tools may be installed for corrosion monitoring or prevention. Hot Tapping can be performed safely with pressure up to 250 bars (3600PSI) and temperatures to +121°C (250°F). When under pressure, the Hot Tap Plug must be removed only in conjunction with the retriever and service valve hook-up. Hot Tap Kits include all equipment necessary to accomplish the hot tapping procedure; Magnetic Swab, Chip remover, and Hydrostatic Test Assemblies, as well as an ample supply of spare parts. The entire Kit is packed in a heavy duty field service box for easy portability and storage. Hot Tap Kits are in use around the world-from the North Sea to the Middle and Far east. The Hot Tap requires little special care and maintenance other than that given any precision tool. The cutters can be resharpened for longer life. The number of cuts depends on the hardness of the steel to be cut, and on the rate of feed while trepanning.

Probes

ER Probes

ER Probes

Electrical resistance (ER) probes measure corrosion rates as an increase in electrical resistance over time for a steel element in the probe face. The increase in electrical resistance is proportional to the accumulated corrosion in the exposure period. The probes may be used in all relevant environments, such as oil, water and gas. CorrOcean’s wide range of probe desigs and probe types let you choose the appropriate probe type and element thickness depending on the application (corrosivity and required response time). A special High Sensitivity ER probe has been developed for inhibitor testing or other situations where rapid response is required.

HSER Probes

HSER Probes

The High Sensitivity ER (HS-ER) probe combines extreme sensitivity and high accuracy. The HS-ER probe is ideal for applications requiring fast response, such as:

  • Establishing uninhibited baseline corrosion rate within hours.
  • Warning of inhibition failure in flowlines.
  • Warning of sudden (e.g. process related) corrosivity increases in pipelines with low corrosivity fluids.
LPR Probes

LPR Probes

CorrOcean LPR probes are designed for two or three electrode LPR (Linear Polarization Resistance) readings. Corrosion rates are determined electrochemically (by Stern-Geary’s equations) from the measured polarization resistance. The use of LPR probes requires a conductive electrolyte, and will give corrosion rates immediately. ER probes, in comparison, also function in low or varying water cut, but require an exposure period in order to establish corrosion rates. LPR probes are therefore recommended for water systems, oil systems with high and continuous water cuts, and for detection of corrosion due to condensation of water. The LPR probe may also be used in combination with other electrochemical techniques such as polarization, AC impedance and electrochemical noise measurements. Probe measurements can be recorded by means of a CorrOcean hand held MultiCorr instrument, or it can form part of a continuous corrosion monitoring system, when used in conjunction with the CorrOcean MultiLog data logger station. The MultiCorr meter (see data sheet 155) includes an extensive and low cost electrochemical test facility, making it possible to obtain full polarisation curves in the field, in a stepwise (potentio-static) or continuous (potentio-dynamic) fashion. These techniques are used by some to establish pitting rates as well as corrosion rates. The CorrOcean LPR probes can be used both with CorrOcean hydraulic access and retrieval system or with any traditional 2" system. LPR probes are designed for long service life.

Galvanic Probes

Galvanic Probes

Galvanic probes are used in water injection systems to monitor small amounts of oxygen which often cause corrosion. This is achieved by measuring the galvanic current in the circuit between a steel and a brass electrode, which has been found to be particularly sensitive to the amount of oxygen in the water. Although the galvanic current, within certain restrictions, is proportional to the oxygen concentration in a system, it may not replace an oxygen sensor. Other parameters affecting the galvanic current are temperature, product flow rate, and not least the amount and quality of coatings and corrosion products forming on the electrode surfaces. This also explains why galvanic currents may be relatively high initially after installation of a probe when the electrodes are clean. Gradually, as deposits build up on the electrodes the galvanic current drops off until a steady state is achieved. If calibrations of the probe readings versus oxygen concentrations are attempted, this should be done after such steady-state conditions have been obtained. Probe data may be measured from the probe by means of a CorrOcean handheld MultiCorr instrument (see data sheet 155) or it can form part of an on- line corrosion monitoring system, when used in conjunction with the CorrOcean MultiLog data logger station.

 Coupons

Coupons and Coupon Holders

Coupons and Coupon Holders

The most common and often least expen- sive method for internal corrosion and condition monitoring is the use of coupons. Using the same material as the pipe, the weight loss or other change of the coupons will be representative for the condition of the pipe or vessel. All CorrOcean coupons are made to NACE specifications. Each coupon is certified to show the serial number, weight (given in grams to four decimal points), dimensions and material type. Each coupon is individually packed in inhibited envelopes with a corrosion free shelf life of one year (in normal room atmosphere). CorrOcean coupons and coupon holders can be used both with CorrOceans hydraulic access retrieval system and with any traditional 2" system.

Bio Scale and Weld

Bio Scale and Weld

  • Accurate, repeatable, non-pulsating flow for shear-sensitive applications
  • Application versatility, from clean, clear liquids, additives and flavorings to viscous and abrasive fluids
  • Design simplicity and premium components for reduced maintenance and replacement
  • Quick disassembly clamp for easy cleaning
  • Sanitary and cost-saving Hygienic models available
  • Bare Shaft and Close-Coupled models available

Retractable Systems 

Retractable Systems

Retractable LPR Probe

The CorrOcean 1” low pressure retractable LPR probe system Model 500 is designed for low pressures and moderate temperatures of up to 1500psi and 230º C, using a nominal one inch pipeline/vessel outlet. Where the access system requires relatively few monitoring points, this system provides an economically alternative to CorrOcean higher pressure system. Like the higher rated system, the CorrOcean Model 500 permits safe, easy insertion and retraction of various corrosion and erosion monitoring devices as well as preventive maintenance type devices – all while under line operating pressure. A manually operated retractor is required for safe control of the probe. A complete line of equipment of corrosion and erosion monitoring is available.

Retractable Coupon Holder

The CorrOcean 1” low pressure retractable coupon holder system Model 300 is designed for low pressures and moderate temperatures of up to 1500psi and 230º C, coupon holder assemblies provide a retractable means of coupon monitoring in processes, using a nominal one inch pipeline/vessel outlet. Where the access system requires relatively few monitoring points, this system provides an economically alternative to CorrOcean higher pressure system. Like the higher rated system, the CorrOcean Model 300 permits safe, easy insertion and retraction of various corrosion and erosion monitoring devices as well as preventive maintenance type devices – all while under line operating pressure. A manually operated retractor is required for safe control of the probe. A complete line of equipment of corrosion and erosion monitoring is available.

Retractable ER Probe

The CorrOcean 1” low pressure retractable ER probe system Model 200 is designed for low pressures and moderate temperatures of up to 1500psi and 230º C, using a nominal one inch pipeline/vessel outlet. Where the access system requires relatively few monitoring points, this system provides an economically alternative to CorrOcean higher pressure system. Like the higher rated system, the CorrOcean Model 200 permits safe, easy insertion and retraction of various corrosion and erosion monitoring devices as well as preventive maintenance type devices – all while under line operating pressure. A manually operated retractor is required for safe control of the probe. A complete line of equipment of corrosion and erosion monitoring is available.

Retractable Injection Tube

The CorrOcean 1” low pressure retractable Injection system is designed for low pressures and moderate temperatures of up to 1500psi and 230º C, using a nominal one inch pipeline/vessel outlet. Where the access system requires relatively few monitoring points, this system provides an economically alternative to CorrOcean higher pressure system. Like the higher rated system, the CorrOcean Model 400 permits safe, easy insertion and retraction of various corrosion and erosion monitoring devices as well as preventive maintenance type devices – all while under line operating pressure. A manually operated retractor is required for safe control of the probe. A complete line of equipment of corrosion and erosion monitoring is available.

Bacterial activity is a common source of corrosion problems. A wide range of bacteria such as Sulphate Reducing Bacteria (SRB), cause a variety of corrosion types and mechanisms. Monitoring of bacterial activity is required for understanding and evaluating the possibility of bacteria induced corrosion, and to control bacterial activity by e.g. biocides. The bio coupon assembly is a simple and common tool for monitoring bacterial activity. The bio coupon assembly comprises a housing with 5 small coupons directly exposed to the internal environment of the pipe or vessel. The assembly is mounted on a bio coupon holder and retrieved at fixed intervals. Bio coupons are used for analysis of layers caused by biological activity only. After retrieval, the coupons are placed in a specially designed airtight container, and sent to a laboratory for immediate analysis. Correct handling of the coupons after retrieval from the pipe is required in order to achieve reliable results.

Instrumentation

CorrLog

CorrLog

CorrLog provides high-sensitivity measurement of corrosion probes, including ER, LPR and galvanic probes. Its robust, user-friendly and low maintenance design gives years of quick response to corrosion inhibitor efficiency. Data can be transferred on-line to a PC equipped with MultiTrend or WellCorr software, or off-line via a handheld device. With low power consumption, CorrLog is well suited for extreme climatic conditions. For off-line corrosion monitoring, a battery-powered CorrLog can be installed as a stand-alone data logger to continuously monitor a single probe at intervals defined by the user. Set-up and downloading of data is achieved by using a handheld terminal, or directly to a PC or palm-top (located outside of hazardous zone) equipped with MultiTrend software.

Field Interface Unit

Field Interface Unit

The Field Interface Unit (FIU) is a central part of Roxar’s on-line monitoring solutions for surface applications, providing power and communication to CorrLog, SandLog and FSM instruments. The FIU sends data onwards to a PC with MultiTrend via serial link, LAN/ethernet, or wireless via radio or telephone modems. Direct communication with a Control System is also available via Modbus protocol. The FIU provides power and communication for CorrLog, SandLog and FSM instruments using the power and communication options that are most practical for each individual installation.

MultiTrend

MultiTrend

MultiTrend is a Windows based software package designed to monitor all your corrosion and sand erosion probes. FSM instrumentation and weight loss coupons. MultiTrend is a configuration tool for your total network of corrosion and erosion monitoring devices, which can be arranged with the easy drag-and-drop interface. Registration of tag numbers, production numbers, types etc. (also for other manufacturers) is supported. It is also a data gathering tool. Instruments may be off-line (using a hand- held terminal), on-line or remotely located (connection through network, modem or similar). It is an analysis and presentation tool. Analyse and filter data, then present them through comprehensive and explanatory graphs- even in real time for erosion and corrosion probes. For FSM data there are also available 3D graph presentation of the data. In 3D, the time stepping function (both forwards and backwards) offers a unique ‘movie’ of how corrosion developments leave an electric fingerprint behind, allowing intuitive understanding of corrosion mechanisms at work. Post processing (numerical analysis) is required to provide exact corrosion values, but relative growth is still easily visible.

Field Signature Method

Corrocean's FSM (Field Signature Method) system has been used worldwide by leading oil, pipeline and pipeline service companies to detect corrosion in a wide range of critical pipeline applications. Today, it continues to represent the pinnacle of corrosion monitoring technology.

FSM detects metal loss, cracking, pitting and grooving due to corrosion by detecting small changes in the way electrical current flows through a metallic structure. With FSM, sensing pins or electrodes are distributed over the area to be monitored, with a typical distance between pins of 2-3 times wall thickness. An initial voltage measurement is taken, and subsequent changes in electrical field pattern are detected and compared against the initial measurement to infer structural changes in the monitored area.

The system presents graphical plots indicating the severity and location of corrosion, and calculates corrosion trends and rates. Both sensitivity and repeatability for general corrosion for on-line FSM-systems are typically better than 0.1% of remaining wall thickness, which means that the actual sensitivity increases as the corrosion attack increases.

This technology gives good results in a number of areas where UT or radiography are difficult, such as complex geometry (i.e. Y-sections), thin walls and high temperatures.

Specialized versions of FSM are available for monitoring pipes located subsea, topside, onshore and buried. It is also available as a portable inspection tool, FSM-IT.

FSM Online/FSMLog

FSM Online/FSMLog

The FSM Online/FSMLog is a system for non-intrusive monitoring of corrosion in pipelines, process piping and vessels. By inducing an electrical current into strategically located pipe sections, FSM Online monitors changes in the electrical field pattern and indicates early warning at the slightest initial signs of metal loss through uniform and localized corrosion. The system is comprised of the FSMLog instrument and sensing pin matrixes permanently installed on the monitored object. The FSMLog instrument is normally charged and communicates via the Roxar CorrOcean Field Interface Unit (FIU). FSMLog can be integrated as a combined monitoring system with Roxar CorrOcean CorrLog and SandLog, including options for wireless communication from remote areas.

Subsea FSM

Subsea FSM

The Roxar subsea FSM is a unique non-intrusive system for monitoring changes in pipe wall over a relatively large area of subsea pipe. By inducing an electrical current into strategically located pipe sections, the subsea FSM monitors changes in the electrical field pattern and indicates early warning at the slightest initial signs of metal loss. Subsea FSM is well suited for monitoring internal general corrosion, corrosion of welds and localized corrosion – contributing greatly to extended service life of subsea pipelines.

MultiTrend

MultiTrend

MultiTrend is a Windows based software package designed to monitor all your corrosion and sand erosion probes. FSM instrumentation and weight loss coupons. MultiTrend is a configuration tool for your total network of corrosion and erosion monitoring devices, which can be arranged with the easy drag-and-drop interface. Registration of tag numbers, production numbers, types etc. (also for other manufacturers) is supported. It is also a data gathering tool. Instruments may be off-line (using a hand- held terminal), on-line or remotely located (connection through network, modem or similar). It is an analysis and presentation tool. Analyse and filter data, then present them through comprehensive and explanatory graphs- even in real time for erosion and corrosion probes. For FSM data there are also available 3D graph presentation of the data. In 3D, the time stepping function (both forwards and backwards) offers a unique ‘movie’ of how corrosion developments leave an electric fingerprint behind, allowing intuitive understanding of corrosion mechanisms at work. Post processing (numerical analysis) is required to provide exact corrosion values, but relative growth is still easily visible.

Sand Erosion System

SandLog is an on-line sand and erosion monitoring device for surface applications. Constructed for high durability in tough field conditions, SandLog is ideal for monitoring installations in remote or inaccessible locations.
For topside/surface sand detection applications, Corrocean offers ER probes in standard 2” hydraulic or mechanical fittings. For off-line or on-line data logging and communications, ER probes may be linked to our SandLog monitoring device, which may communicate onwards with our MultiTrend or WellCorr software for full monitoring and reporting capability.

CorrLog

SandLog is an on-line sand and erosion monitoring device for surface applications. Constructed for high durability in tough field conditions, SandLog is ideal for monitoring installations in remote or inaccessible locations.

For topside/surface sand detection applications, Corrocean offers ER probes in standard 2” hydraulic or mechanical fittings. For off-line or on-line data logging and communications, ER probes may be linked to our SandLog monitoring device, which may communicate onwards with our MultiTrend or WellCorr software for full monitoring and reporting capability.

Field Interface Unit

Field Interface Unit

The Field Interface Unit (FIU) is a central part of Roxar’s on-line monitoring solutions for surface applications, providing power and communication to CorrLog, SandLog and FSM instruments. The FIU sends data onwards to a PC with MultiTrend via serial link, LAN/ethernet, or wireless via radio or telephone modems. Direct communication with a Control System is also available via Modbus protocol. The FIU provides power and communication for CorrLog, SandLog and FSM instruments using the power and communication options that are most practical for each individual installation.

MultiTrend

Sand Erosion Probe

Roxar CorrOcean Sand Erosion probes measure the change in electrical resistance of two to four independent, optimally-positioned (patented) sensing elements as they are eroded by sand. Measurement accuracy is better than +/- 5 nanometer (5 x 10-9m) and response to significant sand production is immediate. The Sand Erosion probe is unaffected by mechanical, electro-mechanical or flow-induced noise.