Selection data
What to pin down before you select a tool
Every tool type is listed against the same set of items. Performance figures always carry their test conditions; a figure quoted without conditions should not be used for selection.
Units
Temperature, pressure and dimensions are quoted in metric units; the English and Russian pages also give imperial values.
| Tool | Items to confirm |
|---|---|
| Pulser | OD · overall length · weight · max operating temperature · max operating pressure · flow range · pulse amplitude · data rate (with test conditions) · encoding scheme · max sand content / LCM tolerance · connection · service interval |
| Turbine generator | OD · overall length · weight · flow range · rated output power and voltage · max temperature · max pressure · pressure drop · bearing design life · permissible mud weight and solids content |
| Directional probe | OD · length · inclination accuracy · azimuth accuracy · toolface accuracy · max temperature · vibration rating · shock rating in g · sampling rate · power requirement |
| Gamma | OD · length · range in API · accuracy · detector type and size · azimuthal or not · max temperature · resolution · statistical error |
| Resistivity | OD · length · operating frequency · depth of investigation · measurement range · accuracy · single or multiple depths · max temperature · max pressure |
| RSS | OD · dogleg severity capability · max temperature · max pressure · flow range · WOB and torque limits · steering method · telemetry link |
| Batteries | Chemistry · nominal voltage · capacity in Ah · operating temperature range · max discharge current · shelf life · dimensions · transport classification and UN number |
| Surface system | Acquisition channels · sampling rate · transducer range · operating temperature · power supply · interfaces and data output formats · WITSML support · ingress protection rating |
Actual figures for each model are supplied with the technical documentation, each with its test conditions stated.