Naslov
The Way to Reduce Pipe Wearing While Drilling

Autori
Matanović, Davorin ; Moslavac, Bojan ; Gaurina-Međimurec, Nediljka

Izvornik
Annual 2010/2011 of the Croatian Academy of Engineering (1332-3482) 1 (2012); 38-45

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
drilling; pipe wearing; lubricants

Sažetak
While drilling there is an additional load on the coiled tubing due to friction with the well walls/rocks regardless the drilling mode ; rotating or sliding. According to recent investigations fatigue is the major factor controlling the service life of coiled tubing. The rate of fatogue damage accumulation is affected by a number of operating factors: mechanical damage, corrosion damage, damage incurred by exceeding the ultimate capacity of the string, and damage due the cycling plastic strain fatigue. Determination of the actual friction coefficient is essential in defining the project technical feasibility. As the part of drilling system, drilling fluid can impact on the reduction of friction coefficient by implementation of lubricants. Selection of lubricants, their compatibility with drilling fluid and rocks was determined through laboratory testing. The results are shown and elaborated in the paper.

Izvorni jezik
Engleski

Znanstvena područja
Rudarstvo, nafta i geološko inženjerstvo

POVEZANOST RADA