| 摘要 |
<p>A method and apparatus for tra nsf erring fluid from a rotor (140) of a top drive apparatus to a non-rotating conduit, (101, 102) such as a gooseneck, the rotor (140) rotating at a working speed, characterised in that a seal (109) is arranged between said rotor (140) and a speed reducer apparatus (160) and a further seal (107) arranged between the speed reducer apparatus (160) a nd the non-rotating conduit (101, 102), the method comprising the step of the speed reducer apparatus (160) rotating at a speed slower than the working speed, such that the seal (109) and further, seal (107) each rotate at slower speed than the working speed.</p> |
