單項選擇題

用9-5/8”(244mm)的套管皮碗試壓器,封5”(127mm)鉆桿,對防噴器組試壓至70MPa。皮碗試壓器承壓面積是42.4”2(274cm2)。試壓時所用鉆桿的最小鋼級是多少?(不考慮安全系數(shù)和應力影響)()

A、E-75優(yōu)質(zhì)鉆桿,抗拉強度=141,000kg(311,200lbs)
B、任何一種鉆桿均可.
C、S—135優(yōu)質(zhì)鉆桿,抗拉強度=254,000kg(560,100lbs)
D、G—105優(yōu)質(zhì)鉆桿,抗拉強度=198,000kg(436,150lbs)
E、X—95優(yōu)質(zhì)鉆桿,抗拉強度=179,000kg(394,200lbs).

微信掃碼免費搜題