The jetting valve design of the leg shoe on the Shengli No.5 workover platform

According to the geologic features where the Sheng-li No.5 workover platform locates, the text states a jetting valve of leg shoe. The jetting valve could prevent from the jam of mud and sand when the platform leg shoe penetrates the seabed, so it is particularly applied to the muddy sea waters such as Bohai.