shallow drilling

"Shallow drilling is now something we should look into," he added.

The shallow drilling programme is central to the systematic survey of the continental shelf.

Additional shallow drillings were made near Urmond.

MEG 208 contains data on baryte exploration, including shallow drilling, in Cheshire.

Another countermeasure is shallow drilling, in which one or more of the pin stacks is drilled slightly shallower than the others.

Work began the following year, but all three of the shallow drilling attempts failed to locate oil due to the shifting sands and unstable clay under the hill.

BGS drilled 18 boreholes west of the Outer Hebrides for the shallow drilling programme described above (see Systematic offshore surveys).

Drilling barge: Mostly used for shallow drilling in non-ocean waters, thise platform is exactly what it sounds like: a floating barge with drilling equipment.

Exploration by the BGS, including shallow drilling, located stratabound lead mineralisation in highly altered and weathered Ordovician subaerial acid lavas and tuffs in the Builth Wells area (MRP 92).

Mark D. Zoback, a geophysics professor at Stanford University, said scientists in Japan had done shallow drilling near the Nojima fault in that country, but never before has anyone attempted to drill directly into a fault zone.

Ridd (1973) showed from evidence obtained by surface mapping and shallow drilling that in the Poxwell anticline in Dorset the surface structure was offset to the north by accommodation in the incompetent Upper Jurassic clays; this may apply to other examples.

In the 1970s, outside of the oil and gas industry, roller bits using mud circulation were replaced by the first pneumatic reciprocating piston Reverse Circulation (RC) drills, and became essentially obsolete for most shallow drilling, and are now only used in certain situations where rocks preclude other methods.