| P number: | P001457 |
|---|---|
| Old photograph number: | C04247 |
| Caption: | Archerbeck Borehole, Canonbie, Dumfriesshire. |
| Description: | Each length of drilling pipe is raised by the hoisting system consisting of the crown block and travelling block. When the joint appears the drillstring is wedged in place in the drilling floor by using slips (so it is not lost down the hole) then the two sections of pipe are unscrewed. The drawworks can be seen behind the drilling pipe. It is the winch that raises the travelling block through the crown block. Unscrewing and stacking drilling rods while pulling out. This process is required when changing the drilling bit or when taking a solid core. The latter is very time consuming and therefore costly as the full drillstring needs to be retrieved for each length of core. |
| Date taken: | Sat Jan 01 00:00:00 GMT 1955 |
| Photographer: | Fisher, W.D. |
| Copyright statement: | Crown |
| Acknowledgment: | This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network |
| X longitude/easting: | 341500 |
| Y latitude/northing: | 577500 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 192.48 KB; 1000 x 710 pixels; 85 x 60 mm (print at 300 DPI); 265 x 188 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Best of BGS Images/ Images from the archives |
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