Drilling
Geotechnical Drilling Rigs
Vessel-mounted geotechnical drilling for offshore site-investigation campaigns — GMTR 120 and GMTR 150 builds delivered for Dina Polaris, Greatship Ragini and FUKADA POSEIDON-1.
Vessel-mounted geotechnical drilling for offshore site-investigation campaigns — GMTR 120 and GMTR 150 builds delivered for Dina Polaris, Greatship Ragini and FUKADA POSEIDON-1.
Vessel-mounted geotechnical drilling rigs engineered for deepwater seabed sampling, CPT testing and offshore wind site investigation. Two production builds — the GMTR 120 (120 MT class, single-tower) and the GMTR 150 (150 MT class, twin-tower with 6 m compensator rams). Both share a modular skid platform with integrated active motion compensation, sample-handling winches and Hydraulics Power Pack & Control Modules — vessel-of-opportunity ready in under 5 days. Project deliveries: GMTR 120 on the Dina Polaris and Greatship Ragini; GMTR 150 on the FUKADA POSEIDON-1.
GMTR 120 (Dina Polaris & Greatship Ragini) · GMTR 150 (FUKADA POSEIDON-1)
Engineering, fabrication, FAT and offshore commissioning of two vessel-mounted geotechnical drilling rig platforms. The GMTR 120 single-tower build mobilised onto the Dina Polaris and Greatship Ragini for deepwater sampling campaigns; the larger GMTR 150 twin-tower build with 6 m compensator rams installed on the FUKADA POSEIDON-1 for high-throughput offshore wind and platform-foundation site investigation.
Engineering, fabrication, FAT and offshore commissioning — all under one roof.
Talk to engineering →Photographs from the GMTR 120 (Dina Polaris & Greatship Ragini) · GMTR 150 (FUKADA POSEIDON-1) — engineered, fabricated and installed by Dimension.
Project photography from a Dimension build — Dina Polaris · Greatship Ragini · FUKADA POSEIDON-1, Singapore (engineered & fabricated) (Programme: multi-year). Class: DNV / BV — project-specific. Client: Geotechnical site-investigation operators.
Select a build to view its full specification table, vessel deployment and key features. All builds share the same modular, precision-machined platform.
120 MT class · single-tower · vessel-mounted · GMTR 120 build delivered for Dina Polaris and Greatship Ragini
Single-tower geotechnical drilling rig in the 120 MT class — the entry build in the GMTR family. Delivered for the Dina Polaris (red OSV) and the Greatship Ragini (green OSV) for deepwater seabed sampling and CPT campaigns. Modular skid design lets the rig mobilise onto a vessel of opportunity in under 5 days, with active heave compensation, integrated sample handling and full PCPT / T-bar tool compatibility.
| Parameter | Value |
|---|---|
| Class | 120 MT |
| Configuration | Single-tower, vessel-mounted skid |
| Sub-seabed Penetration | Up to 200 m |
| Water Depth Range | Surface – 3,000 m |
| Drilling Method | Wireline, top-drive, casing advance |
| Sample Diameter | 76 mm / 100 mm / 150 mm |
| Sample Type | Push, percussion, rotary, CPT |
| Heave Compensation | Active, ± 2.5 m stroke |
| Rotary Top Drive | 20,000 Nm peak torque |
| Mobilisation | < 5 days, vessel-of-opportunity |
| Vessels Delivered | Dina Polaris · Greatship Ragini |
| Mass | ≈ 120 t |
150 MT class · twin-tower · 6 m compensator rams · GMTR 150 build delivered for FUKADA POSEIDON-1
Larger sibling to the GMTR 120 — a twin-tower 150 MT-class geotechnical drilling rig delivered for the FUKADA POSEIDON-1. The package includes twin GMTR 150 towers, 6 m compensator rams, main hoist rams, a 150 MT power swivel, pipe-handling crane, drill-pipe racks, project containers, CPT & SBF umbilical winches, SBF compensation system, SBF traction winches, iron roughneck and Hydraulics Power Pack & Control Modules. Sized for high-throughput offshore wind and platform-foundation site investigation campaigns.
| Parameter | Value |
|---|---|
| Class | 150 MT |
| Configuration | Twin-tower, vessel-mounted skid |
| Compensator | 6 m compensator rams (active) |
| Power Swivel | 150 MT class |
| Sub-seabed Penetration | Up to 200 m |
| Water Depth Range | Surface – 3,000 m |
| Drilling Method | Wireline, top-drive, casing advance |
| Sample Diameter | 76 mm / 100 mm / 150 mm |
| Sample Type | Push, percussion, rotary, CPT |
| Sample Handling | Tools and Sample Handling Winches integrated |
| Auxiliary Winches | CPT & SBF Umbilical Winches · SBF Traction Winches |
| Compensation | SBF Compensation System |
| Pipe Handling | Pipe Handling Crane · Drill Pipe Racks · Iron Roughneck |
| Power & Control | Hydraulics Power Pack & Control Modules · Project Containers |
| Vessel | FUKADA POSEIDON-1 |
| Mobilisation | Modular skid, vessel-of-opportunity ready |
| Class | DNV / BV — project-specific |
Offshore wind farm site investigation
Subsea cable route geotechnical surveys
Platform foundation site investigation
Deepwater seabed sampling and CPT campaigns
Get a tailored datasheet, 3D model and budgetary quotation for your specific project.
From feasibility through commissioning — Dimension delivers in-house engineered marine equipment, backed by 14+ years of offshore operations.
