leading connection innovation

du·o (noun) – A set of two things, who perform together as a pair; the beginning to the end of connection design.

an industry first

The core innovation within the DUO™ connection lies in the industry first multi-taper thread design. Through the combined strengths of a two taper thread, the DUO™ connection design stabs 3x deeper than shallow single-taper alternatives while at the same time delivering the same levels of high torque performance. As a result of deep stabbing, the DUO™ spins up in as few as 4.5 revolutions, compared to up to 11+ revolutions for other high torque connections. Both of these characteristics are key in reducing non-productive time (NPT) on a rig thus saving time and money every trip in and out of the hole.

REVERSING THE TREND

For too long, there has existed a clear and undisputable tradeoff between high torque performance and field handling for drill pipe threads: to maximize one property, the other would be compromised. Put simply, DUO™ is the high torque rotary-shouldered connection the industry has waited for. The DUO™ connection breaks the trend and provides high torque capability meeting or exceeding the highest requirements today, while at the same time offering industry-leading deep stabbing and rapid spin-up performance.

0.75″ Taper

At stress-bearing point in connection increases cross-sectional area, resulting in high torque  performance

ft-lbs

MAXIMUM MAKEUP TORQUE 

400
(5.250″ X 2.688″ TOOL JOINT)

ft-lbs

MAKEUP TORQUE 

DS 40
(5.250″ X 2.688″ TOOL JOINT)

2.00″ Taper

At  nose region of connection shares torque loading, allowing for deep stabbing and spin-up performance

Revolutions to makeup


Connections

Revolutions to makeup

Other high torque
connections

MAKING THE TRANSITION

Linking the individual tapered threads of the DUO™ connection together are the Landing Pad threads. These specifically designed threads self-center the connection, absorb damage, and prevent damage propogation throughout the connection when it is stabbed and spun up. With effective and proper tubular handling, this innovation further assists in reducing recuts and prolonging tool joint life.

Due to the unique design of the DUO™ connection, in most cases the landing pad threads are safely excluded from detailed inspection and are simply field-dressed. This enables the connection to get back into service immediately, saving time and cost on shipping and machine shop repair.

Learn more about DUO’s performance in the field through our DUO™ Connection Development case study.

PROVEN THREADFORM

The DUO™ connection is machined with a V-038R threadform, a time-proven, industry standard API threadform. DUO™ threads feature a full radius thread root, lowering stress concentrations and consequently minimizing fatigue cracking.

The selection of non-proprietary tooling also allows for efficient service throughout Complete Group’s global Licensee Network, ensuring accessories and repairs are available when you need them.

MEET THE FAMILY

The DUO™ family of connections encompasses a wide variety of solutions for drilling operations around the globe and features torque capabilities comparable to, or exceeding, other single-taper high torque connections while also far outpacing them in terms of field handling performance.

390 DUO

4.875″ x 2.688″ Tool Joint Size

22,900 ft-lbs Max. Makeup Torque

400 DUO

5.250″ x 2.688″ Tool Joint Size

31,600 ft-lbs Max. Makeup Torque

430 DUO 

5.250″ x 3.000″ Tool Joint Size

28,200 ft-lbs Max. Makeup Torque

450 DUO

5.500″ x 3.000″ Tool Joint Size

32,500 ft-lbs Rec. Makeup Torque  35,200 ft-lbs Max. Makeup Torque

480 DUO 

4.875″ x 2.688″ Tool Joint Size

19,500 ft-lbs Rec. Makeup Torque  22,900 ft-lbs Max. Makeup Torque

530 DUO

4.875″ x 2.688″ Tool Joint Size

19,500 ft-lbs Rec. Makeup Torque  22,900 ft-lbs Max. Makeup Torque

550 DUO

4.875″ x 2.688″ Tool Joint Size

19,500 ft-lbs Rec. Makeup Torque  22,900 ft-lbs Max. Makeup Torque

580 DUO

4.875″ x 2.688″ Tool Joint Size

19,500 ft-lbs Rec. Makeup Torque  22,900 ft-lbs Max. Makeup Torque

660 DUO

4.875″ x 2.688″ Tool Joint Size

19,500 ft-lbs Rec. Makeup Torque  22,900 ft-lbs Max. Makeup Torque

Features slim or ultra slim tool joint profile with large ID, resulting in fluid efficiency improvements.

DUO Connection Development

Learn more about the development process for the DUO™ connection family.

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