Fremgangsmate for vaeskeloft i borestigeror

• Main Authors: HOPKO SANDRA N, TSAO YUH-HWANG, DAWSON CHARLES R
• Format: Patent
• Language: Norwegian
• Published: 11.02.2008
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

A method for drilling a well below a body of water as disclosed which includes injecting into the well, at a depth below the water surface, a liquid (74) having a lower density than a density of a drilling mud (76) producing a mixture of drilling mud (76) and low-density liquid (74) in the well. The...