Dragon Deepwater has the in depth experience and capability to provide riser and flexible flowline engineering and workpack management. From our initial project definition and specification of the riser and flexible flowline requirements, throughout the fabrication and manufacturing stages to the installation, commissioning and integrity management once in the field, we fully support our customers needs at every step of the way. At Dragon Deepwater we truly believe that our customer service is second to none. Contact us today to see what our deepwater experts can do to help and support your riser and flexible flowline needs. [email protected]
At the time of installation offshore it is standard practice for the OEM or installation contractor to perform an annulus test to establish reference values for the riser and to provide a snapshot in time that can then be reviewed again at a later date. Performing an annulus test will typically reveal any major through thickness damage to the external sheath and any problems associated with the vent ports and valves. Riser Inspection and annulus monitoring are an essential part of any integrity management program for your offshore facility. Periodic testing of the annulus free volume should be performed over the design life of the riser to ascertain the current status of the riser during its life in the field. Annulus testing in conjunction with pressure and temperature monitoring will provide the operator with a good indication of the risers current condition and its general health.
Annulus vent function testing is typically perfomed to determine whether there are any blockages in the vent valves, ports or platform vent system pipework.

Annulus vacuum or pressure testing is typically conducted to determine whether there has been any damage to the internal sheath. This test method also provides an estimate of the liquid content within the annulus.

Annulus gas sampling and analysis is typically carried out to identify what is contained within the annulur environment and to identify the possibility of any early signs of corrosion.

Any subsea development where fexibles are used should have a field specific integrity management strategy and test program in place. The program should be based on a risk assessment and in accordance with the recognized specifications or guidelines. A hazard evaluation and risk assessment should be performed in order to develop the riser integrity management plan. The plan should then be implemented and the results should be recorded and monitored for future learning and further improvement.

Experience has shown that where facilties have implemented a riser integrity management plan or program they have had improved performance while reducing the number of failures. Having a well thought out and planned riser integrity management program will greatly reduce the overall risk related to the riser system.
Operational activites associted with riser systems and integrity management plans can be broken down into three areas; inspection, testing and monitoring. Operators should be aware of the operational and design limitations of the flexibles in service and the results from the inspections, tests and monitoring programs should be reviewed in conjunction with the OEM documentation to verify the integrity of the equipment. A fully comprehensive riser integrity managment program will identify riser degredation early in the process and provide the operator with time to implement a remediation process, and to reduce the likelihood of failure. 

The most common method for inspecting a riser or flexible pipe is by the use of a Remotely Operated Vehicle (ROV) to conduct a general inspection. If existing conditions or damage to the riser system are known, then the ROV inspections can focus on the critical component or priority areas if required. At Dragon Deepwater our engineers and technicians work hand in hand to provide our cutomers with the best customer service possible. A list of our riser and flexible flowline services are listed below:

An effective Riser Integrity Management Program should document, at a minimum the following:

                - Define and specify the inspection techniques for each specific riser installation.

                - Develop integrity management programs. 
                - Perform / Witness onsite inspections and assessments.

                - Perform / Witness Annulus Testing Services
                - Perform / Witness Subsea ROV Inspections
                - What current or future facility operations were affected by this failure and the downtime required to repair? 
                - What are the (estimated and actual) repair costs?
                - What can we learn from this particular failure or remediation & how do we implement change to minimize the probability of

                   recurrence in this, and any other similar situations across other Facilities? 

If you require more information on the full range of our riser integrity management, inspection and annulus testing services please contact us by completing the online form on the contact us page or email us directly at [email protected] to find out out how we can be of service to you.