TT-M Connection

TurboTorque-M connections are the new standard for applications that demand a high-pressure gas-tight connection with faster makeup and improved performance.


The Grant Prideco™ XT-M™ connection has been the industry standard for applications demanding a gas-tight connection. XT-M has been used in the most challenging underbalanced drilling (UBD) wells, for high-pressure fracturing jobs, on riser pipe for well intervention operations, and other pressure-sensitive operations.

Grant Prideco has since introduced TurboTorque-M™ (TT-M™), a line of gas-tight connections that will enable you to drill deeper and faster with higher internal pressure ratings than ever before. In addition, TurboTorque-M produces a step-change in running speeds and ease of use for drill pipe risers.

Using the same design methodology as TurboTorque™, TT-M connections have been designed as a “family” of connections so that each size of connection can be tailored to its application. All TT-M connections feature a proprietary double-start thread form that reduces revolutions from stab to makeup by at least 50%, reducing drilling times and costs. Put simply, TT-M improves in performance over XT-M while running as fast as or faster than American Petroleum Institute (API) connections. Torque capacity, hydraulics, and fishability have all been optimized to suit today’s demanding applications.

TurboTorque-M connections have been thoroughly engineered and have undergone a stringent testing program to validate their performance ratings and design. The gas pressure ratings were verified by pressure testing under combined load conditions. The use of TT-M connections enables:

  • Highest gas pressure rating
  • Saving time and reducing costs
  • Drilling deeper and stepping out further
  • Niche applications

Features and benefits of the Grant Prideco TT-M connection

Gas-tight seal

All TT-M connections are rated gas-tight both internally and externally. As a result of 2 years of design and testing, the metal-to-metal seal has been rated to 10,000 psi external and 20,000 psi of internal gas pressure. The pressure ratings hold under the most extreme load conditions.

Double-start thread

As with TurboTorque, the TT-M connection has a double-start thread. The two thread forms are 180° apart and reduce the turns from stab to makeup by at least 50%. The increased thread-lead angle increases torque capacity by up to 12%.

Stronger tool joints

Standard drill pipe tool joints are made of steel with a specified minimum yield strength (SMYS) of 120,000 psi (120 ksi SMYS). Similar to TurboTorque, TT-M connections are engineered specifically for use with 130 ksi SMYS material.

Fatigue-resistant design

TT-M uses the same dual-radius thread form found on TurboTorque. The dual-radius thread root increases the fatigue resistance of the connection, extending fatigue life and reducing risk.

Gas-tight applications

Drill pipe intervention risers

Following the success of the XT-M 69 connection in use on drill pipe risers, the TurboTorque-M 690 connection has been designed for our next generation of drill pipe risers. Grant Prideco drill pipe intervention risers can be run using conventional rig equipment. In addition, TT-M 690 has been designed to make up in just three turns. This makes the TT-M 690 intervention riser the fastest-running intervention riser in the industry. Coupled with a 20,000 psi internal pressure rating and a 5½-in. inside diameter (ID), the TT-M 690 drill pipe riser is unrivaled in ease of use, pressure rating and load capacity, drift diameter, and fatigue resistance. The robust TT-M 690 connection is durable enough to withstand multiple makeup-and-breakouts without experiencing any galling or other damage.

Drill stem testing and high-pressure fracturing jobs

With 20,000 psi internal and 10,000 psi external gas pressure ratings, there is no safer alternative for drill stem testing or high-pressure fracturing jobs.

Underbalanced drilling

Grant Prideco is the industry leader in manufacturing gas-tight UBD drill strings. Without a single reported leak in over 5 years of UBD operations using XT-M, Grant Prideco sets the benchmark in UBD drill strings. Now TurboTorque-M brings a step-change improvement to your UBD operations while still offering the same robust gas-tight seal and increased pressure rating.


Standard TurboTorque-M Configurations for S135-Grade Drill Pipe

Connection Pipe OD (in.) Nominal Weight (lb/ft) Tool Joint OD × ID (in.) Maximum MUT (ft-lb)
TT-M 380 3.500 13.30 4.750 × 2.688 19,100
TT-M 380 3.500 15.50 4.813 × 2.500 23,200
TT-M 390 4.000 14.00 4.875 × 2.688 22,600
TT-M 420 4.000 14.00 5.250 × 2.938 27,500
TT-M 420 4.000 15.70 5.250 × 2.938 27,500
TT-M 435 4.500 16.60 5.375 × 3.125 28,600
TT-M 485 4.500 16.60 6.000 × 3.563 36,500
TT-M 485 4.500 20.00 6.125 × 3.250 47,300
TT-M 500 5.000 19.50 6.250 × 3.500 45,900
TT-M 525 5.000 19.50 6.500 × 3.875 44,500
TT-M 525 5.000 25.60 6.625 × 3.563 57,300
TT-M 550 5.500 21.90 6.625 × 4.250 45,200
TT-M 585 5.500 21.90 7.000 × 4.500 55,900
TT-M 585 5.500 24.70 7.125 × 4.313 65,900
TT-M 585 5.875 23.40 7.000 × 4.500 55,900
TT-M 585 5.875 26.30 7.000 × 4.500 55,900

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

Related Products

CT-M Connections

eXtreme load gas-tight connections enhanced for demanding completion operations

Learn more

GT-M Connection

The GT-M connection is a low-torque, gas-tight connection ideal for use on intervention risers.

Learn more

TurboTorque Connections

Optimized connection configurations that offer more torque, faster makeup, and enhanced performance

Learn more

MaXit Connection

Our MaXit connection is engineered to take your ultra-deepwater operations further.

Learn more

Related Tools

Man on in a drilling cabin points to a screen

Grant Prideco Licensee Locator

Our licensed repair facilities provide 24/7 service and technical support around the globe for Grant Prideco products to ensure quality and availability.

Learn more
A closeup of a Grant Prideco Double-Shoulder Connection

Grant Prideco Connection Library

Access the most up-to-date technical documents and brochures for our Grant Prideco products.

Learn more