| 摘要 |
A disconnection device (1) for disconnecting a tool (4) and a pipe string (2) comprises a first connection part (6) releasably connected to a second connection part (8) by means of a locking device (18, 22, 30, 38) and a release object (34). The release object (34) is soluble by means of, for example, acid. <IMAGE>
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