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发明公开
CN102865049A 用于全封闭剪切闸板的管道引导臂 有权

用于全封闭剪切闸板的管道引导臂
摘要：
本发明涉及一种用于全封闭剪切闸板的管道引导臂。一种管道剪切闸板组件(11)具有壳体(73)，该壳体(73)具有贯穿壳体(73)竖直地延伸以便管柱(77)通过的孔眼(75)。闸板单元(13,51)具有刀片(17,63)，刀片(17,63)定位成使得当第一闸板单元(13)和第二闸板单元(51)朝彼此移动以剪切井管道(77)时一个刀片在另一个刀片上滑动。成对引导臂(25)从闸板(13)中的一个延伸。引导臂(25)具有比刀片(17)突出更大的距离的末端(29)。引导臂(25)中的每一个均具有内楔形表面(31)，该内楔形表面(31)始于末端(29)并且沿与纵向轴线(28)相交的线延伸，以在第一闸板单元(13)和第二闸板单元(51)移动到闭合位置的情况下朝孔眼(75)的孔眼轴线(79)引导管柱(77)。
摘要（英）：

A pipe shear ram assembly (11) has a housing (73) having a bore (75) extending vertically therethrough for the passage of a pipe string (77). Ram blocks (13, 51) have blades (17, 63) positioned such that one slides over the other when the first and second ram blocks (13, 51) are moved toward each other to shear a well pipe (77). A pair of guide arms (25) extend from one of the rams (13). The guide arms (25) have tips (29) protruding a greater distance than the blade (17). Each of the guide arms (25) has an inboard wedge surface (31) beginning at the tip (29) and extending along a line that intersects the longitudinal axis (28) for guiding the pipe string (77) toward a bore axis (79) of the bore (75) in the event the first and second ram blocks (13, 51) are moved to the closed position.

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