Grant Prideco eXtreme Torque XT connections performing on a rig

XT Connections

The original high-performance rotary-shouldered connections

  • Description Description
  • Ruler Specifications
Description

High-performance connections for extreme drilling conditions

The Grant Prideco™ eXtreme™ Torque (XT™) connection is a high-performance rotary-shouldered connection available for pipe sizes from 2⅜ to 6⅝ in. Incorporating a second-generation double-shouldered design with a proprietary thread profile, these connections provide improved hydraulics and more torque than connections of comparable dimensions. XT connections often enable the use of larger drill pipe for a given hole size while maintaining fishability, and they serve as the market reference for deepwater and extended reach drilling.

Proprietary thread profile

XT connections have a proprietary thread design with a larger root radius to maintain greater fatigue resistance than American Petroleum Institute (API) connections, even at increased operational torque. Cold-rolled threads further enhance their ability to resist fatigue.

Torque optimized

The XT connection is designed to deliver a higher torque rating than first-generation double-shouldered connections. Even in a more streamlined configuration, XT provides 70% more torque than API connections of comparable dimensions. This additional strength meets the required torque for drilling extended reach or in more performance-demanding environments.

Streamlined for performance

The XT connection’s increased torsional strength enables tool joint dimensional optimization that is more aligned with the pipe body torsional strength. It can be configured with a smaller OD and larger ID without sacrificing torsional capacity, which contributes to improved drill string hydraulics. XT connections facilitate the use of larger drill pipe in a set hole size, such as 5⅞ in. drill pipe with XT 57 in an 8½ in. hole size. This provides improved hydraulic efficiency, better hole cleaning, and greater buckling strength without compromising torsional strength or fishability.

Benefits

  • 70% more torque than API
  • Improved hydraulics (up to 50% reduction of internal pressure loss)
  • Enhanced buckling resistance
  • True flush ID for better tool running
 
Specifications

Standard XT Configurations for S135-Grade Drill Pipe

Connection

Pipe OD (in.)

Nominal Weight (lb/ft)

Tool Joint OD × ID (in.)

Maximum MUT (ft-lb)

XT 38

3.500

13.30

4.750 × 2.563

18,800

XT 38

3.500

15.50

4.750 × 2.438

20,500

XT 39

4.000

14.00

4.875 × 2.563

22,200

XT 39

4.000

15.70

4.875 × 2.563

22,200

XT 46

4.500

16.60

6.250 × 3.250

42,000

XT 46

4.500

20.00

6.250 × 3.250

42,000

XT 50

5.000

19.50

6.500 × 3.750

46,100

XT 50

5.000

25.60

6.625 × 3.500

54,300

XT 54

5.500

21.90

6.625 × 4.000

49,900

XT 54

5.500

24.70

6.625 × 4.000

49,900

XT 57

5.875

23.40

7.000 × 4.250

56,500

XT 57

5.875

26.30

7.000 × 4.250

56,500

XT 69

6.625

25.20

8.500 × 5.250

100,100

XT 69

6.625

27.70

8.500 × 5.250

100,100

Contact your Grant Prideco representative for further tool joint OD and ID configurations.


Variations of XT Connections

XTF™

uXT™

XT-M™

Improved fatigue 

X

X

Higher torque 

X

Pressure rated

X

Interchangeability with XT 

X

X

Contact your Grant Prideco representative for more detailed information about our connection technologies.

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