PROJECT - SCIENTIFIC & MINING

NuStar Techologies fullfilled a significant order for special subsea application equipment - long-term borehole monitoring system (LTBMS), for Japan Agency for Marine-Earth Science and Technology (JAMSTEC) in Japan. All equipment were designed, assembled and tested in NuStar facility in Singapore. The equipment included CORK Systems, special hydraulic actuated running tool, guide rollers and BOP isolation test tool.


Cork System


FEATURES

  • • Internal Running profile for hydraulic actuated running tool (deep water applications)
  • • 3000 psi working pressure
  • • 3 Bay system for Cable Slack / Wet Mate Connector / ROV Valves+Datalogger
  • • Includes a ROV platform (2.44m radius octagon with split halves design)
    • • Designed per API 6A, API RP 2A and DNV 2.7.3
Jamstec Cork System

Drilling Guide Roller


FEATURES

  • • The structure provides side support for drill string at moon pool level to disperse the drill pipe high bending stress at slip bowl in rotary table when drill string is dragged by strong current.
  • • The structure also provides a safe working platform to allow work at moonpool area.
  • •The structure is capable of 60kips side force impact due to extremely high current.
  • • Special custom made Poly-Urethane Rollers
  • • Designed per API RP 2A and DNV 2.7.3

Drilling Guide Roller

Completion Guide Roller


FEATURES

  • • The structure is for guiding tubing string for adding the cable and flatpack along tubing pipes at moonpool area.
  • •The structure is capable of 30kips side force impact due to extremely high current.
  • •Special custom made Poly-Urethane Rollers
  • •Designed per API RP 2A and DNV 2.7.3
Completion Guide Roller

Hydraulic Running Tool


FEATURES

  • • Uses internal lockdown profile of the wellhead for locking
  • • The tool allows to conduct for jetting operation of wellhead
  • • Hydraulic activation can be via drill string bore pressure or external ROV supplied hydraulic pressure
  • •Up to 7000m of water depth

Followed with the successful deployment of the earlier special subsea application equipment, NuStar was commissioned by JAMSTEC to design and manufactured the Submarine Mineral Genesis Monitoring System which serves to harvest minerals of the subsea floor for scientific and research purposes.

The equipment supplied include the Submarine Mineral Genesis Monitoring Manifold and Submarine Mineral Genesis Monitoring Cell. These equipment was successfully deployed in Offshore Okinawa, Japan.


FEATURES

  • • Lightweight System Unit; enables deployment by vessel & ROV at lower cost compare to using rig
  • • Retrievable Submarine Mineral Genesis Monitoring Cell to harvest minerals.
  • • Equipped with customized HTHP sensor
  • •Equipped with flowmeter which is able to measure up to 560L/min flowrate at system pressure & temperature



FEATURES

  • •Internal Running profile for hydraulic actuated running tool (deep water applications)
  • • 3000 psi working pressure
  • • 3 Bay system for Cable Slack / Wet Mate Connector / ROV Valves+Datalogger
  • • Includes a ROV platform (2.44m radius octagon with split halves design)
  • • Designed per API 6A, API RP 2A and DNV 2.7.3

With the successful deployment of the earlier Submarine Mineral Genesis Monitoring System, JAMSTEC continues to work with NuStar Technologies to design and manufactured the 2nd generation Submarine Mineral Genesis Monitoring System which serves to meet to their scientific and research purposes.


FEATURES

  • • Uses internal lockdown profile of the wellhead for locking
  • • The tool allows to conduct for jetting operation of wellhead
  • • Hydraulic activation can be via drill string bore pressure or external ROV supplied hydraulic pressure
  • •Up to 7000m of water depth

ROV ISOLATED HYDRAULIC POWER UNIT

  • • Provide an isolation hydraulic supply to prevent contamination to the main ROV hydraulic supply.
  • • The manifold has 5 functions which can be easily connected to multiple tooling or equipment.
  • • Capable of reducing the output flow and output pressure to adapt different tooling requirements.

ROV ISOLATED HYDRAULIC HAMMER DRILL

  • • Provide an isolation hydraulic supply to prevent contamination to the main ROV hydraulic supply.
  • • The tool allows to conduct for jetting operation of wellhead

ROV HYDRAULIC JACKING UNIT

  • • Customized structure to incorporate two hydraulic jack units
  • •Neat and tidy hose management
  • •Capable to reach up to 500kg of jacking force


With the completion of the earlier two systems, NuStar Technologies has been commissioned to upgrade and modified to derive with the next generation of the Submarine Mineral Genesis Monitoring System.




FEATURES

  • •Modular Lightweight System Unit; enables deployment by vessel & ROV at lower cost compare to using rig
  • • Retrievable Submarine Mineral Genesis Monitoring Cell to harvest minerals
  • • Rated up to extreme temperature of 315°C (599°F)
    • • Fully Loggable Telemetry Sensors for flow rate, temperature, pressure and weight
  • •Equipped with flowmeter which is able to measure up to 850L/min flowrate at system pressure & temperature



The Rotating Guide Roller(RGR) is an equipment used at the moon pool level as a support to the drill pipe’s high bending stress at the slip bowl in the rotary table when the drill string is dragged by strong currents towards the AFT. The RGR provides an axial and radial motion of rotation to cater for the unpredictability of the drill string. The design allows personnel to install the VIV suppression ropes with NuStar VIV clamp in a safer manner.


The Diverter Guide Roller(DGR) is designed to install inside the diverter housing and use as a guide for drill pipe during the process of drilling. DGR consists 2 main sub assembly, namely external housing and internal housing, which allow DGR to rotate radially and axially. Radial rotation helps to reduce the grinding effect between drill pipe and DGR rollers during the process of drilling as axial rotation enables the drill pipe to be guided up or down.


NuStar Technologies was commissioned by JAMSTEC in the Chikyu Riser Weldment Repair, Repaint, Maintenance and Storage.




NuStar Technologies has designed and manufactured a riser spider, with load capacity of 2.75 million lbf, for a customer in Japan.

A spider is a device equipped with retractable ‘dogs’ that supports the riser string on the uppermost coupling shoulder during deployment and retrieval.

SPIDER FEATURES

  • • Six hydraulically operated dogs, eliminating the need for manual driving of the dogs.
  • • Fully retractable dogs, enabling maximum diameter of riser string component to drift through the spider
  • • The spider body frame consists of two halves retained by robust lock pins
    • • Designed to be seated on gimbal assembly structure
  • • Fully load tested to 4.125 MMlbf
  • • Successfully deployed during drilling campaign



The NuStar Riser Gimbal is installed between the Riser Spider and the Rotary Table. It is used to reduce the shock and evenly distribute loads on the Riser Spider, as well as the Riser sections.

GIMBAL FEATURES

  • • 60.75” Inner diameter
  • • Riser Gimbal can directly fit onto the 60.50” Varco Rotary Table
  • • Riser Gimbal is able to Interface with the customer’s existing Riser Spider
    • • Hinge half design is for easy installation for the Riser Spider
  • • 2.75 Million Pounds maximum tensile load hanging capacity
  • • 12X Robust Shock absorbers/bearings