The Tie Back Stem is used when a tie back is required. Typical tie back situations result from defective casing strings and provide a new workable casing string.
The Tie Back Stem is stabbed into an existing PBR in a second trip after a milling set has cleaned up the top PBR. To ensure high seal integrity the Seal Stem is equipped with seal assemblies consisting of special Molyglass chevron rings and a central o-ring.
The seal assembly material can be changed to meet all reservoir demands. At the end of the Seal Stem a half mule shoe is installed to support the stab in operation.
In addition, the Seal Stem can be provided with a shearable guide ring to centralize the Seal Stem while running down the hole and to locate the Seal Stem, or rather the seal assemblies, while stabbing into the PBR.
Features/Benefits:
- Available for all PBR sizes and lengths
- Provides sealing between the middle – lower completion and the upper completion
- Standard packing: PTFE and Viton (special sealing on request according to well condition)
- Available with Guide Ring: Gives positive indication for stabbing
- The half mule shoe provides easy stabbing into the PBR even in horizontal wells
