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Professional paper

UDC: UDC: 620.197.2:662.951.23

DOI: 10.7251/afts.2014.0611.051B

COBISS.RS-ID 4572696

 

SELECTION CASING MATERIAL DEPENDING   OF  WELLS FLUID CORROSIVITY

 

Bošković Zvonimir1, Čebašek Vladimir1, Nuhanović Sanel2
1Rudarsko-geološki fakultet, Beograd, E-mail: Ova adresa el. pošte zaštićena je od spam napada, treba omogućiti JavaSkript da biste je videli
2Rudarsko-geološki gradjevinski fakultet, Tuzla

 

 ABSTRACT  Full text (pdf)

World production of pipes is mainly based on the standards of API. However, this does not obligate you to use exclusively for casing manufactured by API standards. The wells that will exploit the hydrocarbons and aggressive media, install the protective casing made ​​of alloy steel not yet covered by API standards. Running  casing operation holds a special place in all phases of the wells because of protective casing  account for a high percentage of the cost of drilling and improperly designed pipe string (or damaged by corrosion) increased costs due to repair of the object. If the fluid layer which produce, present aggressive gases (CO2, H2S, Cl), under certain thermodynamic conditions, it may cause significant corrosion of pipe materials. That created openings in the casing string may allow migration of gas. For this reason it is necessary to know the limits specified partial pressures of gases and estimate conditions in which corrosion is expressed.

 

Key words: partial pressure, corrosion, casing, hardness, hydrogen sulphide

 

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