Open AccessIMPROVEMENT OF THE TECHNIQUE AND TECHNOLOGYOF BEDS ISOLATION USING THE PROFILE EXPANDABLE CASING
Author(s) -
Г С Абдрахманов,
A. A. Zalyatdinov
Publication year - 2016
Publication title -
izvestiâ vysših učebnyh zavedenij. neftʹ i gaz
Language(s) - English
Resource type - Journals
ISSN - 0445-0108
DOI - 10.31660/0445-0108-2016-3-34-37
Subject(s) - casing , drilling , borehole , lost circulation , petroleum engineering , drilling fluid , geology , isolation (microbiology) , completion (oil and gas wells) , welding , geotechnical engineering , engineering , mechanical engineering , microbiology and biotechnology , biology
Drilling of oil and gas wells is a time consuming, very complex process in which there occur all sorts of complications. The most common one is drilling mud loss. During drilling of wells the control of this fluid loss problem takes about 12 % of total time. In this case, up to 60 % of materials and time is spent on isolation of fractured-cavernous beds with high fluid loss intensity which make up only 10 % of the total number of isolated zones. The use of liners with welded and threaded connections of shaped tubes enabled to completely solve the problem of lost circulation zones isolation regardless of their thickness, the borehole caving and the fluid loss intensity.