Although the strength of individual CNT shells is extremely high, weak shear interactions between adjacent shells and tubes lead to significant reduction in the effective strength of multi-walled carbon nanotubes and carbon nanotube bundles down to only a few GPa.  This limitation has been recently addressed by applying high-energy electron irradiation, which crosslinks inner shells and tubes, and effectively increases the strength of these materials to ≈60 GPa for multi-walled carbon nanotubes  and ≈17 GPa for double-walled carbon nanotube bundles.  CNTs are not nearly as strong under compression. Because of their hollow structure and high aspect ratio, they tend to undergo buckling when placed under compressive, torsional, or bending stress. 
Premier Oil plc is an oil and gas Exploration and Production Company publicly listed on the London Stock Exchange. Today Premier Oil’s global production is around 80,000 boepd, of which Vietnam contributes ca. 20% to Premier Oil’s global production. Since commencing operations in Vietnam in September 2004, Premier Oil discovered Chim Sao and Dua fields in Block 12W in the Nam Con Son (NCS) basin offshore Vietnam. First Oil from Chim Sao field was achieved in October 2011 and later that year gas was first exported into the NCS pipeline. Chim Sao field production facilities consist of a wellhead platform and an FPSO. Dua field was developed during 2012 – 2014 and commenced its production in July 2014. Dua crude oil flows up to a subsea wellhead platform then commingles with Chim Sao oil stream to the same production facilities. Currently eleven Chim Sao wells and three Dua wells are producing daily in total ca 30,000 barrels of oil and gas equivalent, and to date Premier Oil Vietnam has produced over 50 million barrels of oil with gas exported to Vietnam via the NCS pipeline. There are nearly 90 professionals working for Premier Oil Vietnam in Ho Chi Minh and Vung Tau, about 90% of whom are Vietnamese. Beside oil and gas business Premier Oil Vietnam puts great emphasis on Corporate Social Responsibility by providing educational opportunity and infrastructure to benefit the people in the communities where we operate.