| 摘要 |
An apparatus (10, 50) for moving an elongate member (102) (such as a wireline (102)) which passes through a throughbore (70, 97) of a valve device such as a wireline valve used in the hydrocarbon production industry is provided. The apparatus includes an upper movement mechanism (18, 58; 91A, 91B; 116) and a lower movement mechanism (20, 60; 91A, 91B; 112) spaced apart about a portion of the valve device (70, 97). The upper (18, 58; 91A, 91B; 116) and lower (20, 60; 91A, 91B; 112) movement mechanisms are actuable such that they are capable of moving the elongate member (102) into a pre-determined position (70, 97), which is typically co-incident with the longitudinal axis of the valve device.
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