Schlumberger

TCR Tubing-Conveyed Gun Release

The Tubing-Conveyed Gun Release enables TCP guns to be dropped off the end of the running string, allowing access to the perforated zone for stimulation, production logging, squeezing or additional perforating. After the guns have dropped, the release housing acts as a tubing reentry guide.

The TCR can be configured two ways:

  • For slickline release, an Otis Type B (or equivalent) shifting tool is run and engages the release sleeve. By jarring up, the sleeve moves, releasing the locking dogs and dropping the guns. The release profile automatically releases the shifting tool from the release sleeve.
  • For pressure release, a ball or test tool is dropped into the TCR, sealing on the ball seat. When pressure is applied, the release sleeve is shifted down, releasing the locking dogs.

The fish remaining in the well consists of only one assembly that can be easily fished. After dropping the guns, the release housing provides a tubing reentry guide with an ID that is at least as large as the tubing it is attached to. For H2S and other hostile environments, the TCR release housing can be made with corrosion-resistant alloys. The TCR can also be supplied with premium threads, if required. These options are available on special request.

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TCR Tubing-Conveyed Gun Release
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