The Rebco GU is the shear-up counterpart to the ROTGS, providing internal fishing-neck engagement through a core/prong assembly but releasing via upward rather than downward jarring. The GU is selected over the ROTGS when well conditions, device positioning, or operational safety considerations make downward jar release undesirable, mirroring the same JUC vs. JDC selection logic applied to external fishing neck tools, but for internal fishing neck devices.

The upward jar release of the GU is mechanically advantageous in high-wellbore-pressure environments where the pressure column assists the upward jar force, making release more reliable. It is also the preferred option when equipment below the stuck device could be damaged by a downward jar during a difficult retrieval.

How to Order: Specify nominal size and GU designation. Confirm internal fishing neck type and that shear-up release is the appropriate choice for the well conditions.

Note: ‘ROT’ is abbreviated for Rebco Oil Tools.