Development and application of nickel base alloy oil casing

Home/Development and application of nickel base alloy oil casing

Development and application of nickel base alloy oil casing

High-sulfur oil and gas wells are constantly being discovered and exploited, and the corrosion problems of such oil and gas wells are very serious.
Ordinary carbon steel, low alloy steel and even small rust steel such as 13Cr and 22Cr can not meet the mining demand. Therefore, the Ni-based composite steel material with large velvet and high Cr, Ni and Mo is applied to the oil casing. In 1975, NACE published standards for the selection of alloy materials for resistance to sulfide stress cracking and stress corrosion cracking in acidic oilfield environments.
The ISO organization merged the standard with EFCl6, 17 and revised the NACE0175/ISO15156 material selection criteria. Before }, this standard has become the basic standard for oil and gas field selection. The NACE0175/ISO15156 standard classifies solid solution nickel-based alloys into four types of 4a, 4b, 4c, 4d, and 4e depending on the content of alloying elements.
The environmental and material limitations of annealed and cold worked high strength solid solution nickel-based alloys for downhole pipe fittings are also given in the NACE0175/ISO15156 standard. The grade and chemical composition of solid solution nickel-based alloys currently used in oil casings.

2019-05-14T16:52:51+08:00 December 28th, 2018|