Downhole Logging Tools
Standard Wireline Logging Tool Strings
Triple Combo
- Accelerator Porosity Sonde (APS)
- Hostile Environment Litho-Density Sonde (HLDS)
- Hostile Environment Natural Gamma Ray Sonde (HNGS)
- Enhanced Digital Telemetry Cartridge (EDTC-B)
- High Resolution Laterolog Array Tool (HRLA)
- Phasor Dual Induction-Spherically Focused Resistivity Tool (DIT)
- Magnetic Susceptibility Sonde (MSS-B)
FMS-Sonic
- Dipole Sonic Imager (DSI)
- Formation MicroScanner (FMS)
- General Purpose Inclinometry Tool (GPIT)
- EDTC-B / HNGS
Borehole Seismics
Downhole Memory Tools
- Advanced Piston Corer Temperature (APCT-3): used to obtain formation temperatures to determine the heat flow gradient
- Sediment Temperature 2 (SET2): designed to take temperature measurements in soft sediment
- Sediment Temperature Pressure (SETP): designed to take temperature and pressure measurements in soft sediments
- Icefield MI5 Digital Borehole Survey Tool: takes magnetic orientation measurements; tool contains triaxial accelerometers and magnetometers and is run on the APC bottom-hole assembly within a nonmagnetic collar
Other Downhole Equipment
- Wireline Heave Compensator (WHC)
- Multitask Acquisition and Imaging System (MAXIS)
- Calibration Equipment
- MFTM
- Motion Decoupled Hydraulic Delivery System (MDHDS)
- Electronic Release System (ERS)
Tools Available Upon Request
The following tools may be made available but need to be requested well in advance of an expedition due to budgetary and/or staff requirements.
- Elevated Temperature Borehole Sensor (ETBS): used to evaluate the feasibility of deploying downhole logging toolstrings in high-temperature settings; measures borehole water temperature rather than sediment temperature.
- Ultrasonic Borehole Imager (UBI)
- Modular Temperature Tool (MTT)
- Core Barrel Drill String Accelerometer (DSA)
- Water Sampler Temperature Probe (WSTP): takes column water samples in the hole
Logging While Drilling (LWD)/Measurement While Drilling (MWD)
LWD tools are used when hole conditions are anticipated to be unsuitable for conventional wireline logging. MWD tools are used when real time acquisition of downhole data is required (e.g., to monitor borehole fluid pressure for safety). See the Schlumberger web site for current available tools.
LWD/MWD tools are not part of the standard tool suite, require substantial additional costs, and need to be identified well in advance of the expedition (i.e., during the proposal phase). Availability on an expedition may require PIs obtaining external funding.