Description The Wireline Heave Compensator (WHC) is an “active” heave compensation system designed to counter the vertical motion (heave) of a ship caused by waves, thus keeping subseafloor logging tools in a fixed position. Such devices are also commonly referred to as Wave Motion Compensators or WMCs. Operationally,...
Description The TAP (High Resolution Temperature / Acceleration / Pressure) tool was designed at LDEO to acquire borehole temperature, tool acceleration and hydrostatic pressure data. It replaced the Lamont Temperature Tool (TLT) and was deployed during ODP and IODP from 1988 to 2005. The TAP tool was...
Description The Dipole Shear Sonic Tool was developed at Lamont-Doherty Earth Observatory. It consisted of a piezoceramic monopole compresional wave transmitter (12-14 kHz), a wideband dipole shear wave transmitter (2-4 kHz), and a semirigid receiver array, including four compressional wave and three shear wave receivers. The...
Description Because a separate logging run dedicated solely to heat flow measurement is not economically feasible, the Borehole Research Group at LDEO designed a self-contained tool that could be attached to the bottom of any of the Schlumberger strings or to the BRG specialty tools from...
Description The Magnetic Susceptibility Sonde version B (MSS-B) is a wireline logging tool that measures borehole magnetic susceptibility at two vertical resolutions and depths of investigation. The tool incorporates a single-coil sensor designed to provide high-resolution measurements of magnetic susceptibility. This sensor was developed by Bartington Instruments. The...
Description The Core Barrel Temperature Tool (CB-TT) was developed by the Borehole Research Group in order to assess temperature conditions while drilling and determine if conditions were favorable for subsequent wireline and Logging-While-Drilling operations in hydrothermal environments. Along with the Drill String Acceleration Tool CB-DSA-XM, the...
Description The Modular Temperature Tool (MTT) is a flexible, general-purpose third party temperature logging tool developed by the Lamont-Doherty Earth Observatory Borehole Research Group. It replaces two previous temperature logging tools: 1) the Temperature-Acceleration-Pressure probe (TAP), which was limited to temperatures below 85°C and operated only...
Description The Multi-Sensor Spectral Gamma Ray Tool (MGT) is a third party tool developed by the Lamont-Doherty Borehole Research Group to improve the vertical resolution of natural gamma-ray logs. This is achieved by using an array of short detector modules with approximately 2 ft (60 cm)...
Description The Multifunction Telemetry Module (MFTM) is a wireline logging telemetry system that allows a string of LDEO wireline tools to operate in a Schlumberger (SLB) toolstring and acquire data in a single logging pass. The MFTM system has a modular design and operates in three configurations: SLB...
Description The Core Barrel – Retrievable Memory Module (CB-RMM) may be deployed routinely with all standard IODP core barrels. It has been designed to capture incoming weight-on-bit, torque-on-bit, and pressure data from the Drilling Sensor Sub via a wireless inductive link. The data are transmitted between two...