Low-cost sales in large quantities Energy saving and ...
Natural Gas - ScienceDirect. 2016-3-1 · Extracting oil and gas is relatively harder than simply drilling a hole. In essence, the hole must be supported by a cemented pipe (Gaszprom, 2014).In current wells, a stepwise-drilling method (see Fig. 2) is used to maintain the pressure uniformity around the walls of the drilled hole.There are a number of factors which affect the efficiency of the oil ...
Get Price