Logging While Drilling

Accel Directional offers resistivity & gamma in their arsenal of LWD tools. These precision tools are among the most durable, accurate, and effective in the world. In combination with the right personnel these logging tools prove an invaluable asset to your well plan. See below for descriptions and specifications of our LWD tools.

Resistivity Tool


Accel Directional's industry-leading resistivity tool offers a dual receiver/quadruple transmitter array, allowing for effective borehole compensation. Dual frequencies (2MHz and 400KHz) deliver multiple depth of investigation capablity. A major advantage of this system is that it runs below the MWD, allowing faster retrieval if required. Redundant corrected and compensated resistivity data is stored in the MWD tool on-board memory. This logging tool is available in 4.75in, 6.75in and 8.25in sizes at operating temperatures as high as 175°C and mud flow rates up to 1200gpm.

Feature4.75in6.75in8.25in
Tool OD (in)5.0 @ antenna
5.25 @ wearbands
6.91 @ antenna
7.16 @ wearbands
8.25 @ antenna
8.50 @ wearbands
Length (ft)14.514.515.16
Max Tool Curvature
(°/100ft) Sliding
251714
Max Tool Curvature
(°/100ft)Rotating
12.287
Max Op Temp (°C)175175175
Max Op Pressure (psi)20,00020,00020,000
Flow Range
(gpm)
100-350300-750450-12000
Telemetry TypePositive Pulse
Slick Line RetrievableMWD Tool is retrievable at a wet connect
Downlink MudYES
MTG/GTF SwitchSelectable angle for changeover
Realtime Update PeriodSelectable; wavelength and pulsewidth dependent
Survey Time PeriodSelectable; wavelength and pulsewidth dependent
Survery (Sliding/Rotating after pump cycle)YES
Measure Point(s) from tool bottom (ft)GR 2.8 ft, Res 6.1 ft, DIR 22.2 ftGR 2.5 ft, Res 6.1 ft, DIR 22.2 ftGR 2.2 ft, Res 6.8ft, DIR 22.9ft

Gamma Module

Accel Directional’s gamma detectors feature a patented flexible dynamic sleeve which surrounds and protects the scintillation assemblies in the array of gamma detectors. These detectors absorb shock and vibration inherent in the BHA. The flexible dynamic sleeve also maintain concentricity parameters designed to improve accuracy of the gamma readings.