Published September 2010

About possibility of increase in efficiency of operational well drilling in abnormal conditions

I. H. Dadashov

I. Ch. Abbasov

Experience of well drilling on some areas of Absheron shows that, in the drilling process on various depths there are a number of complications (absorption of boring solution, gas and water contraction of well tube, collapses etc.) and liquidation of these complications becomes more difficult because of the disparity among some layers which have abnormal pressure in well tube where there is not a protective pipeline. As an example the factual indicators on drilling of the well number 1535 in Lokbatan which is the proof of the occurrence of complications in the result of having various horizons with abnormal pressure in the chink. It lads to occurrences as both gas display and absorption of a boring solution, and even as a rule, the tool can be reached the bottom of the well after each lifting and raising of boring pipeline with the correct selection of density of a boring solution. It is recommended to use drilling technology and protective (operational) pipelines for the solution of such problems. Abroad this wide spreading technology is very convenient for solution of drilling problems and decrease in loss time and means. In this article the advantages of drilling technology with protective pipelines in operational well drilling in abnormal condition are shown.