The main function of the mousehole is to hold pipe during stand building or breakdown. 鼠洞 are designed to use the area below the drill floor and are flush-mounted with the drill floor on installation. Cameron mouseholes are available in a range of designs:

• 固定
• 伸缩
• 旋转
• 柯尔特
• 兔子
• rotary-mounted固定.

All types can be equipped with the following:

• hydraulic centralizer/spring-powered centralizer
• 工具箱或钻头破碎器
• torque wrench to make and break connections while building and breaking stands, respectively
• 专利减震器.