PSW Technology`s engineering department has designed a range of products for the rig/offshore/subsea marked. The products are manufactured, assembled and tested  in PSW Technology's own facilities.

Our engineering department also provides external service for customers like product design, hydraulic design, subsea design and R&D work within subsea and offshore related projects.

API drift

API 16A drifts are used for testing BOP to satisfy API 53 requirements; verifying there are no restrictions that could prevent downhole tooling from passing through.  Our API Pipe Drifts are manufactured to API 16A Specifications or your custom specifications. Drifts are hollow or solid, with pad eye, drill treads or other arrangements for handling. Xylan coated or to custom specifications. Delivered on wooden cradle with protective bubble wrap.


  • Measuring report
  • Material certificate
  • User manual
  • Dimensional drawing

API test mandrel

API 16A test mandrels are used for pressure testing of BOP Annulars.

During pressure testing, the annular is closed towards the upper part of the test mandrel. The test mandrel is held in place by the BOP RAM.

The test mandrels are designed with pad eye or drill threads in top for handling the mandrel into the annular/BOP. The test mandrel comes with a dimensional report and an engineering report to confirm the mechanical strength is in accordance with the pressure rating. Surface treatment is normally Xylan coating.


Pressure test tools

PSW Technology has pressure test-tool sets to auxiliary lines for serval riser systems. It is possible to test each auxiliary line independently, or we can, by request, make solutions for testing all the auxiliary lines in one riser simultaneously. We also have equipment to perform heated and cooled pressure test to confirm that sealings can handle temperatures from -5°C to 90°C. Test pressure up to 22 500 PSI (1 552 bar).


Riser replacement parts

PSW Technology offers a range of DNV certified pressure connectors (pin/box) for riser auxillary lines with rating up to 15K pressure rating. The connectors are designed, manufactured and tested according to API 16C. The pin connectors are normally delivered with Stellite no. 6 overlay welding on seal surface area, and box connectors with Inconel 625 overlay welding in seal grooves. Standard material for mud connectors is AISI4130 75ksi NACE MR-175. Standard material for hydraulic connectors is Duplex. PSW Technology also offers replacement of pin/box during 5-years riser classing including required pressure testing according to API.


Riser centralizers

The PSW Technology`s centralizers are designed to aid in the installation process of risers and equipment through the diverter. The centralizers are made of the latest PU technology for minimum weight and maximum roughness. The units are kept in position by means of built-in stop collars clamped to the main pipe. PSW Technology offers a range of solutions designed to customer's specifications and demands.

Riser protectors

When transporting and storing drill riser joints, pin and box end connectors are always subject to potential damage. To prevent unnecessary and expensive repair work to these critical areas, PSW Technology provides a range of lightweight, high impact and abrasion resistant elastomer protectors. With growing numbers of drilling contractors recognizing the latest in high-performing PU pin and box end protection, PSW Technology can help achieve easier handling, fitting, transportation and storage by providing these highly cost effective products.


Riser flanges and connectors

PSW Technology offers special designed riser flanges and connectors to meet the customers specifications. We perform all design, material specification, analysis, fabrication and testing required according to API for DNV approval of the product.





ROV panels

 PSW Technology has the capability to design, manufacture, assemble and test ROV panels for several applications.






Riser/Slip-Joint handling clamps

Clamps designed for handling of risers and slip joints. The clamps are tailor made for each type of riser or slip joint. PSW Technology performs the required design, manufacturing and testing/certification.




Storage rack for riser bolts

The rack is used to store riser bolts in a safe manner. The bolts rests against POM and rubber, and there are typically space for 28 bolts in each rack. Each rack is fitted with lifting lugs and is stackable. The size is adjusted to a Euro Pallet size. The rack comes with a four-part lifting sling certified according to NORSOK R-002 for internal handling on a rig. The rack can easily be reconfigured to other types of riser bolts.


Storage rack for riser systems

The Riser Storage Rack's are designed for safe and efficient storage of risers in a storage room or out on deck. The racks are designed for several riser systems and can also be ordered on customers' requirements. The system consists of a bottom cradle and several intermediate cradles. Depending on storage room configuration, the cradles and the risers will be mechanically linked together including the possibility to lock the stable together and to surrounding lashing points. The racks are designed with proper lifting points for internal handling on the rig.


Riser tension ring

Riser Tension Rings are used under demanding conditions where the riser strings needs to be kept in center of the moonpool. PSW Technology has designed and manufactured a tension ring designed for 4x80mT tension. An example is a riser joint with flex joint combined with a tension ring successfully used under harsh and demanding condition offshore South Africa.



Riser adapter

Riser adapter is the connection between the marine riser and the LMRP on top of the BOP stack. The riser adapter is an X-over from the Lower Riser Flange to the top of the Lower Flexjoint. The riser adapter is also the connection point for the booster line into the riser main bore. The riser adapter also keeps the kick-out subs from the auxiliary lines / hydraulic lines to the flexible lines down to the BOP and Pods. PSW Technology`s  performs the design, FE-analysis, and engineering package necessary to comply with the API rules. PSW Technolgoy also performs the full scale pull test for issue of the DnV approval letter. The pull test (up to 1900 ton) is performed with strain gauges to verify the FE analysis.



X-over is an adapter between connectors of different standards. In example between an API HUB and an API flange. If there are different pressure ratings, the X-over will have the lowest pressure rating. The X-overs are typically delivered with Inconel overlay in the BX Groove (if any), surfaces and tolerances according to actual standards. Material specs is typically AISI4130 75 KSI NACE 0-175, or as per client spec. All X-overs can be delivered with Design Approval from DNV. All X-overs are pressure tested.


  • COC
  • Material Certificates
  • Measuring report
  • NDR report, if applicable
  • Standard welding report, if applicable 

MUX cable tension system

In cases where a MUX cable is installed to control the BOP functions, there is always a risk to damage the umbilical in the harsh moonpool-area. PSW Technology`s system, with a constant umbilical tension, is an alternative to a traditional "storm-loop". The advantage with our system is to keep the umbilical away from the harsh moonpool environment and thereby to avoid any mechanical damages to the umbilical.

The system automatically compensates for the rig's vertical movements and keeps the umbilical tension constant by means of gravity force and sheaves. Because of the transmission made by the sheaves, the compensating wagon only move 1/6 of the rig movement. Loading of umbilical is adjustable with weights.  

The system has been successfully installed on several rigs, and the feedback has been overwhelmingly positive. 

Contact us
For any questions, please ask for
Håvard Kallestad
Want to send us a message?

Open requestform

Please fill in required info



PSW Power & Automation has installed the solar power plant on the roof of parent company PSW Group's new facilities in Mongstad. With its 1200 solar panels over 2500 square meters, the plant is the tenth largest in Norway, and the building's own power generation is approximately 350,000 kWh per year.

Read more
nemko presafe.png
Norsk Sertifisering.jpg