First, connect the guide shoe and the casing shoe. 先接好引鞋和套管鞋。
Through study,the reason is off-centralizing casing. 研究发现,套管不居中是该问题的原因所在。
The initial gushing of oil out of a drill pipe is caused by the pressure of the gas trapped and compressed immediately above the oil deposits. 最初石油喷出钻管,是由于受到紧压在石油层上的被密封的气体的压力。