发明名称 PIPELINE ROTATION SYSTEM
摘要 A pipe rotation device having a pair of rollers supported by a frame that ca n move vertically relative to a base supporting the frame. A pipe normally supported by a supporting member is vertically hoisted by the rollers upon vertical movement of the frame. A pai r of ratchets are pivotally connected to the rollers at one respective end and have a connecti on therebetween at the other respective ends such that movement of the connection therebetween by an extendable device imparts rotary motion of the rollers for rotating the pipe. A brake inhibits back-rotation during the return of the ratchets to their original positions for subsequent rotation.
申请公布号 CA2488958(A1) 申请公布日期 2006.06.03
申请号 CA20042488958 申请日期 2004.12.03
申请人 WILLBROS MSI CANADA INC. 发明人 BOGIC, BRIAN;CANNON, RICHARD;MCIVOR, GARRY
分类号 F16L1/024 主分类号 F16L1/024
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