Petroleum Science >2013,??Issue 3:??385-394 DOI: https://doi.org/10.1007/s12182-013-0286-1
The effects of sulfide stress cracking on themechanical properties and intergranular crackingof P110 casing steel in sour environments Open?Access
文章信息
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
文章摘要
cracking (SSC) in sour environments, was investigated using tensile and impact tests. These tests
were carried out on specimens, which were pretreated under the following conditions for 168 hours:
temperature, 60 °C; pressure, 10 MPa; H2S partial pressure, 1 MPa and CO2 partial pressure, 1 MPa;
preload stress, 80% of the yield strength (σs); medium, simulated formation water. The reduction in
tensile and impact strengths for P-110 casing specimens in corrosive environments were 28% and
54%, respectively. The surface morphology analysis indicated that surface damage and uniform plastic
deformation occurred as a result of strain aging. Impact toughness of the casing decreased significantly
and intergranular cracking occurred when specimens were maintained at a high stress level of 85% σs.
关键词
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Acidic solutions, high-temperature corrosion, hydrogen embrittlement, intergranularcorrosion, sulfide stress cracking