Jack-up Geotechnical Drilling Rig GMRJ50

Geoquip Marine jack-up barge with GMRJ50 nearshore drilling rig
Water + borehole depth

Nearshore geotechnical drilling productivity

The Geoquip Marine, designed and built GMRJ50 drilling rig is a nearshore solution capable of conducting drilling, sampling and testing operations from a jack-up barge. A simultaneous drilling and casing system is operated with this rig, this being far more efficient in terms of time and equipment than traditional rod based drilling systems.

Drill rigs for deep water

High quality sample recovery

The core barrel and the casing are advanced together, ensuring a high quality sample recovery and a stable borehole. When full, the core barrel is de-latched from the lead length of casing, brought to deck level and the sample extruded horizontally. In softer soils we can utilise an offshore standard wireline operated piston sampler providing high quality undisturbed samples in soft sediments.

Guar gum is used to form the flush medium during drilling operations. It is mixed with seawater, and the resulting ‘mud’ or flush is then pumped downhole, providing lubrication during drilling, stabilising the borehole and lifting away the cuttings from the base of the hole.

Quality Samples
Download Specification Sheet


We are ready to answer any questions about our in-house designed, built and operated nearshore and offshore geotechnical drilling rigs.

Contact one of our regional offices near you, today.

Inquire here