Gas Lift Mandrels

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GLM-1.0
GLMA-1.0
GLM-1.5
GLMGA-1.5

    Side pocket gas lift mandrels   

The highest design, engineering, manufacturing, and quality assurance practices have been incorporated into all of BST's side pocket gas lift mandrels since BST's first high pressure (10,000 psi) mandrels were delivered to Otis/Halliburton in 1982.  Engineering design is based on proven computer software developed at BST Lift Systems to ensure perfect fit, function, and strength parameters.  Manufacturing is controlled by engineering drawings and written specifications.  All completed mandrels are function tested with a valve and latch, and then hydrotested with the valve in place to ensure pocket seal and end connection thread integrity.

GLM-1.0 is a basic oval side pocket mandrel with a 1" pocket, standard (API "S") porting from casing, with the BK-2 style latch profile, and without either a tool deflector or orienting sleeve.

GLMA-1.0 is the same as GLM-1.0, except the tool deflector and orienting sleeve have been added.

GLM-1.5 is a basic oval side pocket mandrel with a 1" style pocket, standard (API "S") porting from casing, with the RA style latch profile, and without either a tool deflector or orienting sleeve.

GLMGA-1.5 has a 1" style pocket, standard (API "S") porting from casing, with the RK style latch profile, a tool deflector, and an orienting sleeve.

Other porting (API "E," "C," or "W") is also available on special order.  Standard API 5B EUE 8Rd end connection sizes are 2-3/8", 2-7/8", and 3".  Other thread styles and sizes are available on special order.

Design and Construction Features:

  All mandrels are designed, manufactured, and tested in accordance with the criteria specified in API Spec 11V1.

 Standard material is 4130 chrome-moly alloy steel, normalized, quenched, and tempered to HRc 18-22 for H2S service in accordance with NACE MR-01-72.  All heat treating is performed after the mandrel assembly has been welded together to assure consistent material properties.  Premium materials are also available (e.g., 13 Cr).

  Pockets are CNC machined from forged bar stock, and pocket seal bores are reamed and burnished to 32 RMS or better finish and a .002 tolerance on the diameter.

  All end swages have additional thread recut allowance.  All API Spec 5B and most other thread types can be cut by BST.

  Additional length below the pocket is provided to remove flow cut valves that cannot be removed by normal wireline methods.

  Tool deflectors (when provided) are integral to the top of the pocket (above the latch profile).

  Every mandrel manufactured by BST is fully traceable to original mill certificates and all manufacturing processes through a unique code on each mandrel.

All products listed are currently available from BST Lift Systems.  Please contact us for details.


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Copyright 2013 BST Lift Systems Inc.
Last modified: August 17, 2017

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