Standars Geotechnical drilling usually involved some insitu tests while drilling such as Standard Penetration Test, Pressure Meter Test and Field Vane Shear Test. Some disturbed and undisturbed sample are also taken for laboratory analysis. To assure that undisturbed sample can be retrieved in high quality, we are utilizing the proper tools for the specific soil behavior based on their consistency:

  • Osterberg (GUS) fixed piston sampler for undisturbed sampling in very soft-soft of sandy soil to obtain Class 1 quality sample referring to BS-5930 and EN ISO 22375-1 Part 6 2009 Standard. This hydraulic fixed piston type sampler can be done using a single rod resulting fast and reliable sample.
  • Mazier core barrel system for undisturbed sampling in soft-hard soils. Especially when alternating consistency of layers are encountered
  • Triple core barrel system for rock formations.

We are also able and having intensive experiences to conduct Cone Penetration Test with/without Pore Pressure measuerment. We have developed some CPT Rigs having various driving capacity of 2.5 - 20 tons. There are 3 type of CPT rigs developed:

  • Light weight (wheel) CPT rig.
  • Skid mounted CPT rig that also have capability to drill.
  • Crawler mounted CPT rig that also have capability to drill.
  • Truck mounted CPT rig.


Taka hydrocore owns and operates geotechnical drilling rigs which complete with heave compensated system which can be set u onto vessels of opportunity anywhere. The drill rigs use standard 5.5" API drill pipe and have a capability to drill to 250m or other type of drill pipes. Wireline tools are available for deployment inside the drill pipe to perform Cone Penetration Test (CPT) and to recover undisturbed samples. The drilling system also incorporates a coring facility enableing core recovery of soil and rock. The wireline system can also be used to raise and lower downhole geophysical logging tools.


To Bring and extend our capability to condut exploratory and geotechnical drilling survey over the water we build wooden staging or wooden platform for shallow deep water down to maximum 3-4 m water depth. We olso developed Modular Pontoon system to allow drilling and getechnical survey to be conducted deeper down to maximum 25 m. CPT/U on the pontoon conducted using downhole CPT system.

We are developing the possibility to use jack up rig to allow drilling and geotechnical survey to be conducted deeper and also getting more reliable result.

Completing the exploratory, geotechnical and hydrogeological drilling work we also provide the supporting services to those work such as:

  • Positioning and Topographic Survey.
  • Geotechnical Logging
  • Pump Test and Slug Test
  • Basic Geotechnical Engineering
  • Soil Laboratory Test (sister company PT. Hydrocore)

Water Well

Enviromental Drilling

Our services in mining exproratory drilling are to provide a high quality coring using suitable equipments and supported by qualified field geologist or supervisors. The drilling can be performed in conventional or wireline method in NQ, HQ or PQ size with depth varies from 20 m to 700 m depending on client requirements. Sampling for exploratory drilling purposed at mining company usually using the standard as requested by the client such as JORC standard.


We have developed some drilling rigs based on how they are mobilized:

  • Skid drilling rig having various drilling capacity from shallow to deep (down to 1000 m).
  • Mobile drilling rig: wheel drilling rig, tractor¬† mounted drilling rig, crawler mounted drilling rig.