Centek Group

5500 SW 36th St
Oklahoma City,  OK  73179

United States
  • Booth: 8143

The global benchmark for centralization

Centek Group specialize in the development of engineering solutions for the world’s toughest casing running environments. Showing ZERO downtime with the benefits of cost savings, time savings, full size range availability, outstanding reliability and downhole performance, Centek has become the global benchmark for centralization.


  • Close Tolerance Centralizers
    Centek close tolerance centralizers contribute to greater well productivity by ensuring an enhanced cementation job in deepwater wells....

  • With innovative single-piece construction, premium steel alloy, and jigsaw joints, Centek close tolerance centralizers contribute to greater well productivity by ensuring an enhanced cementation job in deepwater wells.

    As leading innovators in centralizer design, Centek understands the need for a close tolerance centralizer for use in tight annulus applications, where narrow margins between pore pressure and the fracture gradient exist. In deepwater operations centralizers must compress virtually flat to allow travel through a series of tight casing strings but still be capable of expanding to the designed open-hole size.

    The endbands (or rings) on Centek close tolerance centralizers are manufactured to very tight tolerances where the ID of the centralizer is only 0.030 in. over the maximum casing OD. They are also manufactured with superior roundness which allows for closer hugging of the casing.

    Centek close tolerance centralizers are designed with a precisely formed cross bow curvature so there are no “knife edges” (common among standard bow spring centralizers) as the bows are inserted into a subsea well head or supplemental adapter in deepwater drilling operations reducing the risk of subsea well head damage. This also adds additional strength to the bows.

    The rugged, single piece design of Centek close tolerance centralizers ensures no point loading of a single bow (common among welded/integral lock bow spring centralizers) occurs during RIH. Centek close tolerance centralizers evenly distribute the axial and radial loads throughout the entire unit as they are applied during close tolerance casing running operations.

    Centek close tolerance centralizers are available in UROS-CT, TUR-CT and TUR HD-CTdesign. 

    Centek close tolerance centralizers

    • Designed to challenge the traditional and extremely costly centralizer sub market.
    • Provides maximum stand-off in tight annulus applications.
    • Engineered to precise ring-gauge tolerances, because every millimeter saved allows for greater expansion in the open hole.
    • Low-profile design provides peak flow-by performance to reduce the surge effect common with narrow annular clearances as well as reducing ECD signatures.


    Tight casing tolerances
    Highly deviated wells
    UR Wells Sections
    Horizontal/ERD wells
    Vertical-Wash Out Sections


    Centek close tolerance centralizers are available in sizes from 5" to 17 7/8"
  • CentrAce
    Innovative new product created for Deepwater wells. Combines a low profile Ace stop collar with a close tolerance Centek centralizer...

  • Developed in partnership with Ace Oil Tools, the CentrAce is an innovative new product created for Deepwater wells. It combines a low profile Ace stop collar with a close tolerance Centek centralizer. It is designed for use in deepwater tight tolerance applications as an over pipe, pulled in, rotational method of centralization thus reducing the dependency on subs. It is also well suited for use in under-reamed applications and ideal for wash-out sections, as the centralizer OD is over sized, or, as a simple unit of choice when running standard OCTG casing sizes.

    • The CentrAce tool is designed to deliver tailored casing solutions to achieve total depth and dependable barriers
    • The CentrAce’s unique integrated Ace stop collar means only one stop collar is needed
    • The over pipe design reduces the cost of both product and installation, with the advantage of multiple units on a single length of casing, if required for critical zones with no casing modifications needed
    • Rapid and simple hydraulic installation technique can be done in pipe yard or on site
    • The unit can rotate on the casing due to novel swivel interlock design. This assists with the agitation of the cement helping ensure dependable barriers
    • Time saving are assured as less make ups are required
    • The bow springs are designed for tight annular restrictions with optimized bow cross curvature and restoring forces
    • Low cross sectional improves flow by area helping with mud removal and cement displacement

    Key benefits:

    • Holding force of >90,000lbs
    • Pulled into the well by the casing
    • Time and cost savings
    • Multiple units per joint can be installed if required
    • Casing can be rotated
    • Low ECD signature
    • Low friction unit
    • High standoff ratio
    • High restoring force
    • High flow by area
    • Fully compressed in tight tolerance casing conditions
    • Full traceability of the product
    • Hydraulically installed
    • Fitted to casing on the pipe rack or yard.
    • Can be bundled for offshore transport or placed in racks
    • Adaptable for use with a TUR or UROS designed centralizer
    • Fully heat treated
    • Centralizer remains a single piece unit

    Designed and manufactured by Centek and Ace Oil Tools, the CentrAce range will be available in a number of sizes:

    Nominal casing Size


    Minimum Diameter CentrAce will pass through


    7 5/8 8.13
    9 5/8 10.15
    9 7/8 10.40
    10 1/8 10.66
    11 3/4 12.30
    11 7/8 12.42
    13 5/8 14.19
    14  14.57
    16 16.59
    17 17.60
    18 18.61

  • Centralizer Sub
    Designed to be run as part of a tight tolerance casing string in deepwater, ultra-narrow annulus applications....

  • The Centek Centralizer Sub is designed to be run as part of a tight tolerance casing string in deepwater, ultra-narrow annulus applications.

    The Centek Centralizer Sub is fitted with a close tolerance centralizer of either UROS-CT or TUR-CT design.

    In both options the Sub centralizer’s single piece construction eliminates the risk of failure associated with a welded bow to end band type designs. This, coupled with precise manufacturing, enables the centralizer sub to rotate within the centralizer at minimal torque values.

    The unique interlocked band design means that the strength of the centralizer end-bands does not depend on quality or installer skill, but is as strong as the single piece of steel used in Centek’s centralizers. In addition, the weld pocket recesses are designed to ensure there is no need for a pronounced weld bead with the risk of friction grinding the bead down and weakening the weld.

    Each sub centralizer is manufactured with minimal clearance to the casing and with a precisely formed cross bow curvature so that there are no “knife edges” (common among standard bow spring centralizers) which reduces the risk of subsea well head damage. Both the UROS-CT and TUR-CT versions can recess completely into the sub body during operation and so pass through the tightest of restrictions.

    The sub body, manufactured to API 5CT requirements, will meet or exceed burst, collapse and tensile ratings and will be threaded to fit the casing string. Centek has the capability to supply sub bodies tailored to meet customer specifications.


    Ultra-narrow annulus
    Alternative to standard subs that will have higher initial insertion forces due to bow design

    Features and Benefits:

    • Designed specifically for ultra-tight tolerance applications
    • Low ECD (equivalent circulating density) signature to lower surge effect during RIH (run in hole)
    • Allows for rotation when fully compressed
    • Fewer bows for more efficient RIH
    • Will meet or exceed host casing burst and collapse specifications
    • Interlocked band design gives the strength of a single piece centralizer

    Size Range

    Centek Centralizer Subs are available from 5 1/2” through to 18” 

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