Toughmet 3 Rod Couplings

  • Eliminate frequent workovers, lower production costs and improve margin and cash flow
  • Designed to resist tubing-coupling wear. Increase tubing life.
  • Low Friction / Non Galling.
  • Corrosion Resistant.
  • High fatique strength.
  • Increase pump efficiencies. 

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ToughMet copper-nickel-tin alloys have been successfully used in the oil and gas industry for decades. The newest ToughMet temper—ToughMet 3 TS 95 material—was specifcally engineered for ToughMet sucker rod couplings, which eliminate well failures caused by coupling-on-tubing wear.

In addition, wells using 150 or more ToughMet couplings can increase production by nearly 13% due to lower friction, improved plunger travel and increased well effciency. This low friction property is ideal for deviated wells that experience high friction issues such as rod hang-ups, buckling and compression. 

Toghmet 3 couplings are proven to increase mean time between failures (MTBF) of wells that experience high levels of tubing wear. Results show that the couplings increases tubing life by 3x compared to spray metal couplings and 2x compared to T couplings. 

All ToughMet 3 couplings are manufactured to API 11B sucker rod coupling dimensions. 

Advantages of the Hydraulic Tubing Anchor

Low Friction / Non Galling

The unique non-galling properties of ToughMet® 3 TS 95 alloy, along with high fatigue strength, provide longer coupling and tubing life than couplings made of conventional materials.


When used in wells in place of Spraymetal (SM) and Class T couplings, ToughMet couplings last longer – without sacrifcing the tubing.

Reduced Tubing Wear

ToughMet couplings are tested and proven to increase mean time to failure by at least three times compared to spray metal couplings and two times compared to T couplings. 


Coupling on tubing wear is usually due to sliding adhesive wear with a small abrasive component. Toughmet 3 couplings have a dissimilar metal material to the tubing (ferrous vs copper-based on the Toughmet). Dissimilar metal couples generally exhibit the best wear behaviour. In addition, the ToughMet 3 coupling exhibits lower friction, thus lowering wear. 

Increases Pump Efficiency

Due to its non-galling and low friction properties, ToughMet® couplings allow the sucker rod string to move more smoothly and the well to operate more effciently. 


Using ToughMet couplings increases downhole stroke, pump fllage, and oil production, and decreases fluid level above the pump, gear box loads, and polished rod loads.


High Strength Properties

ToughMet® sucker rod couplings are made from the strongest coupling material that mitigates failures caused by coupling-on-tubing wear.


ToughMet properties were upgraded to increase fatigue strength and fracture toughness specifcally for artifcial lift couplings. ToughMet couplings resist mechanical failure when running in artifcial lift systems.


Unlike spray metal couplings, the ToughMet 3 couplings are not coated but has the same material over the entire body. 

Keeps tubing in constant tension

NACE MR0175 and ISO 15156 allow unrestricted use of ToughMet® couplings in sour environments because it is a copper alloy. ToughMet couplings will not crack in hydrogen sulfde (SSC). The general weight loss corrosion rate of ToughMet couplings in well fluids depends on the temperature and partial pressure of hydrogen sulfde. ToughMet alloy resists CO2 corrosion, chloride stress corrosion cracking (SCC) and hydrogen embrittlement (HE), and it is compatible with commonly used well-treatment chemicals.

Specifications 

Sucker Rod Couplings
Coupling Sizes OD - Full Size OD - Slim Hole
5/8" 1.50" 1.25"
3/4" 1.625" 1.50"
7/8" 1.812" 1.625"
1" 2.187" 2.000"
1-1/8" 2.375" N/A
Cross-over Couplings
Coupling Sizes OD - Full Size OD - Slim Hole
7/8" x 3/4" 1.812" 1.625"
1" x 3/4" 2.187" 2.000"
1" x 7/8" 2.187" 2.000"
5/8" x 3/4" 1.625" 1.500"
Polished Rod Couplings
Coupling Sizes OD - Full Size OD - Slim Hole
3/4" 1.625" 1.50"
7/8" 1.812" 1.625"
1" 2.187" 2.000"
1-1/8" 2.375" N/A