Logging While Drilling
 

Logging While Drilling Measurements for Well Placement, Formation Evaluation and Drilling Optimization

Real-time data from our LWD services lets you make informed decisions when you need to make them—reducing drilling time and costs.

 
 
SureShot Gamma Sensor
   
The SureShot gamma sensor employs a rugged scintillation counter and photomultiplier mounted in a specially-designed package which provides protection against the high levels of shock and vibration encountered in the drilling environment. The natural gamma ray sensor module is an add-on to our SureShot Measurement-While-Drilling (MWD) system. The gamma sensor is calibrated to API-standard units, and a wellsite check source is available to verify tool performance in the field or maintenance repair shop.

The easy-to-use SureShot surface system scales natural gamma ray data to API units; corrects for borehole size, mud weight and drill collar effects; assigns each point a depth from the depth tracking system; and plots both real-time displays and configurable hard copy logs. Data can be exported in standard industry formats (WITS and LAS).

The SureShot MWD downhole system can be programmed to send a combination of gamma ray and tool face data transmissions to allow logging while steering and sliding. A rotation sensor in the directional package enables the tool to optionally transmit only gamma ray data while rotating.

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Wave Propogation Resistivity
   
WPR sub is a spatially compensated, dual frequency (400 kHz & 2 MHZ), dual spacing device designed for wireline-equivalent Logging-While-Drilling (LWD) and Measurements- After-Drilling (MAD) services in all well types. Applications include geosteering, correlation, pore pressure trend analysis, casing point selection, wireline replacement, logging whiletripping and logging with and without the flow switch enabled (for air- and foam-drilled wells).

WPR's symmetrical design, with centrally located receiver antennas, provides real-time compensation, eliminates invasion effects due to measurement delays, and improves accuracy by canceling variations in receiver channels.

WPR operates in all mud types including oil-based and salt-saturated and provides realtime resistivity with flexible transmission formats. High-resolution data is stored in downhole memory which can be retrieved and processed during trips.

GTDS provides a complete set of software-enabled borehole corrections and applications with WPR, including a dipping bed model for geosteering.

GTDS offers a Pressure-While-Drilling (PWD) option for 4.75 in., 6.75 in. and 8.0 in. WPR.
 
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Services
Well Planning and Engineering
Performance Drilling
Directional Drilling
Measurements While Drilling
North Seeking Gyro
Magnetic Multishot
Logging While Drilling
Drilling Mechanics
Drilling Tools Rental
Real Time Data Transmission
 
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