Table T3. LWD/MWD tool acronyms, descriptions, and units.
| Tool | Output | Description | Unit |
|---|---|---|---|
| Surface | Drilling parameters | ||
| BD | Bit depth | m | |
| TD | Total depth | m | |
| HKLD | Hook load | kkgf | |
| SPPA | Surface pump pressure | kkgf | |
| ROP*5 | 5 ft averaged rate of penetration | m/h | |
| SWOB | Surface weight on bit | kkgf | |
| GRM1 | LWD natural gamma radiation | gAPI | |
| CRPM_RT | Collar rotation | rpm | |
| TRPM_RT | Fluid pulse turbine rotation | rpm | |
| MWD | Measurement while drilling | ||
| RGX | Rotating axial accelerometer | rpm | |
| RHX | Rotating axial magnetometer | rpm | |
| A_JAM | Antijam counter | ||
| TUR_RPM | Turbine rotation | rpm | |
| SHOCK | Shock counter | ||
| CRPMS | Average MWD collar rotation | rpm | |
| STICKNSLIP | Peak-to-peak collar rotation | rpm | |
| MTF/GTF | Magnetic/gravity toolface | ||
| LTBRT | LTB retries counter | ||
| MWDSTAT | Tool status word | ||
| DI_TEMP | Direction and inclination sensor temperature | °C | |
| TOTALSHOCK | Total shocks | ||
| CUREDT | Current equivalent drilling time | ||
| arcVISION real time/APWD | Annular pressure while drilling/Array resistivity tool | ||
| APRS_c | Annular pressure | kPa | |
| ATEMP_c | Annular temperature | °C | |
| SHKLV_c | Shock level | ||
| ARC6STAT | Tool status word | ||
| PESD_c | Hydrostatic pressure during pump off | ||
| ESDT_c | Time stamp for PESD | ||
| PMIN_c | Minimum pressure during pump off | ||
| PMIT_c | Time stamp for PMIN | ||
| PMAX_c | Maximum pressure during pump off | ||
| PMAT_c | Time stamp for PMAX | ||
| arcVISION memory | Array resistivity tool | ||
| DHAP | Downhole annular pressure | kPa | |
| DHAT | Downhole annular temperature | °C | |
| ECD | Equivalent circulating density | g/cm3 | |
| sonicVISION real time | Sonic while drilling tool | ||
| DTCO_s | Δt compressional slowness | µs/ft | |
| CHCO_s | Sonic compressional semblance | ||
| C_PEAK3_s | First 3 peak array with Δt, coherence, and traveltime | ||
| SONSK_s | Shock risk | ||
| sonicVISION memory | Sonic while drilling tool | ||
| SPWi | Receiver_i spectrum array | — | |
| Wfi | Filtered waveform_i, 1/2 ft averaged | ||
| WFiT | Filtered waveform _i, 2 inch averaged | ||
| DTTA | Δt compressional from transmitter array | µs/ft | |
| DTBC | Δt compressional borehole compensated | µs/ft | |
| DTDF | Δt compressional difference between DTRA and DTTA | µs/ft | |
| CHRA | Coherence at compressional peak; receiver array | — | |
| CHTA | Coherence at compressional peak; transmitter array | — | |
| TTRA | Transit time at compressional peak; receiver array | µs | |
| TTTA | Transit time at compressional peak; transmitter array | µs | |
| ITTI | Integrated transit time | ms | |
| DTCO | Δt compressional after processing | µs/ft | |
| geoVISION real time | geoVISION resistivity tool | ||
| GRRA_r | Natural gamma radiation average | gAPI | |
| RING_r | Ring resistivity | ||
| RBIT_r | Resistivity at bit | Ωm | |
| RSBA_r | Shallow button resistivity average | Ωm | |
| RMBA_r | Medium button resistivity average | Ωm | |
| RDBA_r | Deep button resistivity average | Ωm | |
| SHKT_r | Transverse shock | ||
| SHKA_r | Axial shocks | ||
| RABSTAT | Tool status word | ||
| geoVISION memory | geoVISION resistivity tool | ||
| GR | Total natural gamma radiation | gAPI | |
| GR_IMG | Total natural gamma radiation image | gAPI | |
| RES_RING | Ring resistivity | Ωm | |
| RES_BIT | Bit resistivity | Ωm | |
| RES_BS | Shallow button resistivity | Ωm | |
| RES_BM | Medium button resistivity | Ωm | |
| RES_BD | Deep button resistivity | Ωm | |
| RES_BS_IMG | Shallow button resistivity image | Ωm | |
| RES_BM_IMG | Medium button resistivity image | Ωm | |
| RES_BD_IMG | Deep button resistivity image | Ωm | |
| TAB_RAB_BS | Shallow button resistivity time after bit | s | |
| TAB_RAB_BM | Medium button resistivity time after bit | s | |
| TAB_RAB_BD | Deep button resistivity time after bit | s | |
| AZIM | Measured azimuth from well survey | ° | |
| P1AZ | Pad 1 azimuth in horizontal plane (0 = true north) | ° | |
| P1NO | Pad 1 azimuth in horizontal orthogonal to tool axis (0 = true north) | ° | |
| ROP5 | Rate of penetration averaged over the last 5 ft (1.5 m) | ° | |
| P1NO | Pad 1 rotation relative to north azimuth | ° | |
| TAB_GR | Gamma ray time after bit | h | |
| TAB_RES_BIT | Bit resistivity time after bit | h | |
| TAB_RES_RING | Ring resistivity time after bit | h | |
| TAB_RES_BS | Shallow button resistivity time after bit | h | |
| TAB_RES_BM | Medium button resistivity time after bit | h | |
| TAB_RES_BD | Deep button resistivity time after bit | h | |
| RPM | Rotational speed | rpm | |
| SHKL_AXL | Axial shock level | ||
| SHKL_RAD | Radial shock level |
LWD = logging while drilling, MWD = measurement while drilling. Receiver i = 1, 2, 3, or 4.
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