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- Improving well performance and integrity

NexLift - Unwelded SPM

NexLift Side Pocket Mandrel

Next Generation unwelded gas lift mandrel.


Unwelded, machined from a single piece of steel providing unrivalled structural integrity.




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) NexLift™ 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 gas lift equipment designed and manufactured to API standards.




  • Machined from a single piece of steel
  • Smooth inner bore
  • By-pass slots for cables and control lines
  • Hinged keeper plates for by-pass lines
  • Gas Lift and Chemical injection applications




  • Superior structural integrity
  • Best choice for sour environments
  • Simpler QA/QC, less prone to scrappage and delivery delays
  • Elimination of weak links in the completion string
  • Less chamfers and grooves where wireline tools may hang up
  • No loose parts that can be dropped in hole (hinged keeper plates)




 Size in. 5 1/2
Pocket Size, in.

1 1/2

Mandrel Body Round
Major OD, in. 8.250
Min. ID, in. 4.660
Bypass Dimensions 2 off 1.732" x 0.512" [13mm x 44mm]
Latch Profile RM
Qualification Critereia API 19G1, Q1, V1, F1*

*Except external pressure test


NexLift Ratings* 


 80 Ksi         95 Ksi         110 Ksi

Burst, psi                  

13 770        16 339        18 909

Collapse, psi             

12 137        14 401        16 666

Tension, klb            

 567              672             778

Compression, klb   

 567              672             778

 *  Based on yield strength at ambient temperature. Excluding end connections.

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