From pre-spud site surveys to anchor handling on location, we deliver accurate, safe and on-schedule offshore operations across Southeast Asia.
Site and debris surveys, geotechnical investigation, rig and barge positioning, anchor handling and rig move planning — from the pre-spud survey to the rig on location.
Surveyors and marine specialists with decades offshore.
Latest-generation acoustic and positioning systems.
Real-time QC, processing and clear deliverables.
Four service lines for rig placement and rig moves. Request one, or brief us on the whole campaign.
Acoustic survey of the seabed and shallow geology, so rig placement starts from real data.
Seabed and shallow-geology assessment for exploration well rig placement, pilot holes and boreholes.
Equipment
Detection and mapping of seabed debris around platforms and exploration well locations for safe rig placement.
Subsurface site investigation for foundation and rig-placement design.
Precise positioning of rigs and barges, with real-time guidance for anchor deployment and recovery.
Includes
End-to-end engineering so every tow and anchor spread is planned before the rig moves.
Includes
Submarine cable route surveys delivered for power projects in the Gulf of Thailand.
Submarine cable route survey for the 230 kV Khanom – Ko Samui Submarine Cable System Project. Data collected to support design and construction of the route from Khanom HV Substation to Ko Samui HV Substation, Surat Thani.
DTS and route survey for installation of the HVAC submarine cable system from Khanom HV Substation (Nakhon Si Thammarat) to Ko Samui HV Substation (Surat Thani), part of EGAT's 230 kV Khanom – Ko Samui Submarine Cable System Project.
Physical characteristics and geographic coordinate survey for 22 kV submarine cable routes: Khao Laem Ya – Koh Samet (Rayong, ~5 km) and Laem Ngop – Koh Chang (Trat, ~6 km).
All four service lines and the survey equipment on one page, ready to share with your drilling and marine teams.
Placing a jack-up rig or barge accurately on a planned location, with the seabed surveyed first for debris, pipelines and soil conditions, and anchors laid to a pattern that avoids existing infrastructure.
Bathymetry, side-scan sonar for debris and obstructions, sub-bottom profiling, magnetometer sweep for pipelines and cables, and geotechnical sampling by CPT or vibro-corer to confirm the seabed can carry the rig legs.
Yes. JST provides surveyors and positioning engineers on the rig and the anchor-handling vessels, with DGPS and USBL systems, and produces the as-laid anchor pattern report.
Yes. JST has surveyed cable routes for EGAT, PEA and J-Power in the Gulf of Thailand, including the 230 kV Khanom to Ko Samui submarine cable, and pre-lay and post-lay pipeline surveys.
A survey vessel is kept mobilised in Thailand, and crews and equipment can typically be on site within one to two weeks depending on permits and weather.
Tell us where, when and what you need. Our business development team replies with scope and availability.
