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TSDS High Torque Connections

Your Drilling Advantage

Texas Steel Double Shoulder (TSDS) High Torque connections are built to provide the additional torque and torsional strength for your drilling application.

Enhanced Performance - Increases drilling performance through improved hydraulic capacity and exceptional torsional strength.

Versatile Compatibility - Interchangeable with API industry standard threads and certain other double shoulder connections.

Superior Torsional Strength - Torque capacity is 40% to 60% greater than standard API connections for comparable size drill pipe.

Exceptional Value - Providing lower initial product cost, lower cost of rework, reduced material cost and longer operational life.

Reduced Rig Time - Minimal make-up turns equal to API and special handling tools are not required.


All TSDS Product table

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    TSDS Connection

    TSDS 42

    Drill Pipe Performance Characteristics

    Pipe Body

    New-API New 95%RBW Premium
    OD(in) 4.500 4.500 4.365
    Wall Thickness(in) 0.337 0.320 0.270
    ID ref.(in) 3.826 3.860 3.826
    Calculated Plain End Weights(lbs/ft) 14.98 14.29 11.81
    Note: Premium properties are calculated based on uniform OD and wall thickness.
    Cross Sectional Area Pipe Body (in2) 4.407 4.204 3.469
    Cross Sectional Area OD (in2) 15.90 15.90 14.97
    Cross Sectional Area ID (in2) 11.50 11.70 11.50
    Section Modulus (in3) 4.271 4.104 3.347
    Polar Section Modulus (in3) 8.543 8.209 6.694
    Torsional Yield (ft-lbs) 55,453 55,286 43,450
    Tensile Yield (ft-lbs) 595,004 567,542 468,297
    80% Torsional Yield (ft-lbs) 44,362 44,629 34,760
    Internal Pressure Yield (psi) 17,693 19,209 16,176
    Collapse Capacity (psi) 16,773 15,116 10,964

    Drill Pipe Assembly with TSDS42 Tool Joint

    API Adjusted Weight (lbs/ft) 17.86
    95% Adjusted Weight (lbs/ft) 17.25
    Premium Adjusted Weight (lbs/ft) 14.88
    Assm Length Shld'r to Shld'r approx. (ft)) 31.50
    Displacement Open Ends approx. (gal/ft) 0.273
    Fluid Capcity approx. (gal/ft) 0.573

    Tool Joint

    TSDS42 CONNECTION OD (in) 5 1/4
    ID (in) 2 13/16
    Tool Joint with a Material Yield Strength of 135,000 pst
    Pin Tong Length (in) 9
    Box Tong Length (in) 12
    Torsional Yield New (ft-lbs) 41,980
    Recommended Make-Up Torque New (ft-lbs) 25,180
    Recommended Make-Up Torque Premium (ft-lbs) 25,540
    Balance OD (in) 5.257
    Pin Tensile Yield (lbs) 891,100
    Approx. Tension to Yield Pin at Reccomended Make-Up Torque New (lb)
    Approx. Tension to Yield Pin at Reccomended Make-Up Torque Premium (lb)
    Tool Joint/Drill Pipe torsional Ratio (New Pipe) 0.76
    Tool Joint/Drill Pipe torsional Ratio (Premium Pipe) 0.83
    Min OD for premium class (in) 5.094

    Technical Notes

    1. All data is calculated based on standard methods. No safety factor is applied.
    2. Premium Class drill pipe data is based on a minimum wall thickness equal to 80% of new drill pipe nominal wall thickness, reference API RP7G.
    3. Specified tool joint OD is smaller than the standard API tool joint for 4-1/2 drill pipe. New and/or used tool joint size might not be suitable for hoisting the drill string with a bottle neck elevator. User is advised to contact their elevator manufacturer for elevator hoist capacity rating versus tool joint OD.
    4. The technical information contained herein is for reference purposes only. TSC Drill Pipe does not assume responsibility for results obtained through the use of technical information, no warrenty is expressed or implied. User is fully responsible for the accuracy and suitability of use of the technical information and application of appropriate safety factor.