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- Improving well performance and integrity

NexLift SI-CI Unwelded Chemical Injection Gas Lift Mandrel

NexLift SI
NexLift SI Unwelded Gas Lift Mandrel
NexLift SI-CI
Unwelded Chemical Injection Gas Lift Mandrel

PTC’s NexLift SI-CITM is the only true single-piece, unwelded Side Pocket Mandrel in the industry. This unique design provides unrivalled structural integrity, removes the last welded completion component from the well along with issues related to installation and retrieval of chemical injection valves. International Operating Companies are now installing the field provenNexLift SI-CITM world wide.



Conventional side pocket mandrels (SPM) have inherent challenges related to welding and heat-treatment. These issues are exacerbated when welding nickel-chromium alloys, such as S13%Cr, 25%Cr and Alloy 718, common materials for high cost completions.


Challenges caused by manufacturing processes such as welding and post weld heat treatment require stringent and elaborate QA/QC processes. Despite all efforts, satisfactory repeatability of the manufacturing process is difficult to achive.



Today, SPMs are the only welded loadbearing component in a modern completion string. The elimination of welding brings the SPM to the same structural integrity level as the rest of the machined components in the string.


Petroleum Technology Company’s (PTC) next generation NexLift SI-CI™ SPM enhances the robustness of the completion string and is the best choice for challenging well applications in which superior longevity, strength and enhanced pressure capabilities are required. The API 19G1 qualification assures full compatibility with the chemical injection valves designed and manufactured to API standards. Furthermore, all PTC side pocket mandrels meet and exceed the highest standard in the industry.



  • Rigorous QA/QC satisfying and exceeding API 19G1 Q1 standard
  • Machined from a single piece of steel
  • Optimal inner geometry
  • Qualification criteria: API 19G1, Q1, V1, F1
  • By-pass slots for cables and control lines
    Hinged keeper plates to by-pass lines



  • Superior structural integrity
  • Best choice for sour environments
  • Eliminates the welded components in the completion string
  • No chamfers and grooves and full-length discriminator slot with rounded edges, improves the success rate of KOT operations
    No loose parts that can be dropped in hole (hinged keeper plates)


For specifications please see relevant product flyer.

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