|
Acronym
|
Definition
|
Comment
|
|---|---|---|
| APC | Advanced Piston Corer | A coring tool |
| APCT | Advanced Piston Corer Temperature tool | An APC coring shoe with thermistors for making temperature measurements |
| BCR | Bi-centered reamer | A bit used to open holes to a larger diameter than the bit diameter |
| BHA | Bottom-hole assembly | The bit, the thick-wall joints of pipe, and other parts that are at the bottom of the drill string |
| CADA | Cam-Actuated Drill-Ahead tool | A casing running tool made by Drill Quip |
| DDI | Downhole Designs, Incorporated | A company |
| DP | Dynamic positioning | A shipboard navigation system |
| EOP | End of pipe | The end of the pipe |
| FMS | Formation MicroScanner | A logging tool |
| gpm | Gallons per minute | A circulation rate for fluids out the end of the drill pipe |
| GPS | Global Positioning System | A satellite navigation system |
| GUATB-03C | Guatemalan Basin site selected for drilling | Now known as Site 1256 |
| LGH | Lower guide horn | A guide located below the moonpool that keeps the pipe from getting bent sharply at the base of the ship |
| mbrf | Meters below rig floor | Depth measured from the rig floor |
| mbsf | Meters below seafloor | Depth measured from the seafloor |
| PDR | Precision depth recorder | An instrument for estimating water depth |
| PFT | Perfluorocarbon tracer | A dye used for microbiological contamination tests |
| RCB | Rotary core barrel | A coring tool |
| ROP | Rate of penetration | A coring or drilling penetration rate |
| spm | Strokes per minute | A circulation rate for fluids out the end of the drill pipe; 1 spm ~ 5 gpm |
| SSR | Subsurface release | A tool used for connecting to and releasing from casing |
| TDC | Tapered Drill Collar | A tapered heavy-walled tubular that is part of the BHA |
| UTC | Universal Time Coordinated | A time standard |
| VIT | Vibration-isolated television | The camera that is lowered along the drill string |
| WHC | Wireline heave compensator | Reduces motion of wireline tools by compensating for ship heave |
| WOB | Weight on bit | The weight at the bit |
| WOW | Waiting on weather | An operational delay caused by weather conditions |
| WOW | Waiting on whales | An operational delay in using the seismic guns because whales were in the vicinity |
| XCB | Extended core barrel | A coring tool |
Note: This table is also available in ASCII.