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TTGM-55

TG Series Double-ledge High-torsion Big Water Hole Drill Rod

     Double-ledge high-torsion big water hole drill rod is our new developed product; compared with API joint, it has similar makeup and breakout, and possesses the following advantages:

  1. Double-ledge design is better to uniform the stress distribution, with two ends of thread to bear the load. Compared with API joint, it has stronger rigidity, and torsion resistance performance is increased by more than 30% under the same wall thickness;
  2. The junction stress concentration is decreased; fatigue resistance is improved, so as to prolong the service life; compared with API thread, more outer diameter wear loss is allowed prior to the degrade;
  3. Joint outer diameter is appropriately reduced, and annulus space is increased through optimization design, to accordingly lower the circulating pressure loss in annulus space and improve the joint salvageable ability;
  4. Smooth inner surface design improves the joint hydraulic performance, result in more stable flow and smaller turbulence, to reduce the possibility of erosion and cement and solid particles deposition in the joint.
  5. Inner diameter is increased through the optimization design, to reduce the circulating pressure loss within the drill tool, raise the efficiency and capacity of pumping in the drill string, and enhance the capacity of various cables and instruments in the drill string.

At present, our company’s typical double-ledge high-torsion big water hole products include TG55 and TG50, etc.


TG Series Drill Rod Parameters


Drill Rod Spec.


Pipe End Thickening Type


Drill Rod Steel Grade


Pound Class (b/ff)


Nominal Wall Thickness (mm)


Male Thread Joint Tong Space Length (mm)


Female Thread Joint Tong Space Length (mm)


Single Drill Rod Length and Range m


Male Thread Joint Inner Diameter (mm)


Female Thread Joint Inner Diameter (mm)


Male & Female Thread Joint Outer Diameter (mm)


Pipe Body Outer Diameter (mm)


Drill Rod Joint Thread Form


Maximum Makeup Torque (N-M)

4½“18”

IEU

G105

20.00

10.92

228.6

381

9.60+0.15

82.6

≥82.6

158.8

114.3

TG46

38610

4½“18”

IEU

S135

20.00

10.92

228.6

381

9.60+0.15

82.6

≥82.6

158.8

114.3

TG46

38610

5“18”

IEU

G105

25.60

12.7

254

381

9.60+0.15

95.3

≥95.3

168.3

127.0

TG50

43350

5“18”

IEU

S135

25.60

12.7

254

381

9.60+0.15

95.3

≥95.3

168.3

127.0

TG50

43350

5½“18”

IEU

G105

24.70

10.54

254

381

9.60+0.15

101.6

≥101.6

177.8

139.7

TG55

62730

5½“18”

IEU

S135

24.70

10.54

254

381

9.60+0.15

101.6

≥101.6

177.8

139.7

TG55

62730





 
 

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