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.
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.
