TECHICAL Series MATHEMATICS  INFORMATICS  PHYSICS Series PHILOLOGY Series ECONOMIC SCIENCES Sereies EDUCATIONAL SCIENCES Series LAW AND SOCIAL SCIENCES Series
Corrosion of Drill Pipes in Contact with Drilling Mud
(Coroziunea prǎjinilor de foraj n contact cu fluidele de foraj naturale)
Vol LXI • No. 4/2009
Mihaela Manea, Maria Georgeta Popescu, Floarea Manea
Universitatea Petrol - Gaze din Ploiesti, Bd. Bucuresti nr. 39, Ploiesti
e-mail: mmanea@upg-ploiesti.ro

 Keywords   corrosion, drilling mud, NaCl contamination, temperature.

 Abstract
The paper presents aspects regarding the corrosive action of salty drilling fluids in contact with the metallic surfaces of the drilling equipment. Drilling fluids are characterized from the rheological point of view. In addition, other standard properties are determined, such as density, filtrate volume and cake thickness. All these properties help to establish the stability degree of the dispersed system water - clay. In static regime, the corrosive processes are evaluated using the gravimetric method, at temperatures of 25C and 80C and NaCl concentrations of 15% and 30% respectively. Based on the experimental results, the intensity of the corrosive process, due to temperature and salt content from the drilling mud, is correlated with the main characteristics of these fluids.

 Rezumat
n lucrare sunt prezentate aspecte privind acţiunea corosivǎ a unor fluide de foraj sǎrate, care vin n contact cu suprafeţele metalice ale echipamentelor de foraj. Fluidele de foraj sunt caracterizate din punct de vedere al comportǎrii reologice. Se determinǎ, de asemenea, şi alte proprietǎţi standard precum densitatea, volumul cumulativ de filtrat şi grosimea turtei de colmatare. Cu ajutorul acestor proprietǎţi se caracterizeazǎ stabilitatea sistemului dispers apǎ - argilǎ. Evaluarea proceselor corosive, n regim static, se face prin metoda gravimetricǎ, la temperaturi de 25C şi 80C şi la concentraţii de NaCl de 15% şi 30%. Pe baza rezultatelor obţinute se coreleazǎ intensitatea procesului coroziv datorat temperaturii conţinutului de sare din fluidele de foraj cu principalele caracteristici ale acestora.



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