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Integral Joint Tubing (IJ)

Description

Integral joint tubing has external thread at on end and internal thread at the other end. This oil pipe can be connected without the use of couplings. Cylindrical surface, conical surface, spherical surface and reverse circular cone step surface are arranged successively on the outer end of the external thread and inner end of the internal thread parts. These metal surfaces form a sealing structure and the first step. On the other side of the external and the internal joints there is a second step which forms the major anti-torque step. The second step and the first step form a double-step structure.

Advantages

1. Integral joint tubing is very practical. With the integral joint structure, the oil pipe connecting procedure is saved.
2. Metal sealing, double anti-torque steps and high-efficiency connecting threads are effectively combined together. This method has obviously improved the connection strength, sealing effect and the anti-torque capability.
3. The integral joint tubing can meet the requirements of both normal oil and gas extraction and special working condition of high torsional well repair acid fracturing operation. This oil pipe can replace small drill rod and lower the cost of oil field operation.

Parameters
Specification Nominal Weight Outer Diameter Wall Thickness Processing Mode of the Ends
Steel Grade
NU(non-upset) with Thread and Coupling EU(external-upset) with Thread and Coupling in mm in mm J55 K55 L80 N80 C90 T95 P110
1.900 2.40 - 1.900 48.26 0.125 3.18 PI - - - - -
2.75 2.90 0.145 3.68 PNUI PNUI PNUI PNUI PNUI -
3.65 3.73 0.200 5.08 PU PU PU PU PU PU
4.42 - 0.250 6.35 - P - P P -
5.15 - 0.300 7.62 - P - P P -
2 3/8 4.00 - 2.375 60.3 0.167 4.24 PN PN PN PN PN -
4.00 4.70 0.190 4.83 PNU PNU PNU PNU PNU PNU
5.80 5.95 0.254 6.45 - PNU PNU PNU PNU PNU
6.60 - 0.259 7.49 P P P P P -
7.35 7.45 0.336 8.53 PU PU PU PU PU -
2 7/8 6.40 6.50 2.875 73.02 0.217 5.51 PNU PNU PNU PNU PNU PNU
7.80 7.90 0.276 7.01 - PNU PNU PNU PNU PNU
8.60 8.70 0.308 7.82 - PNU PNU PNU PNU PNU
9.35 9.45 0.340 8.64 - PU - PU PU -
  
10.50 - 0.392 9.96 - P - P P -
11.50 - 0.440 11.18 - P - P P -
3 1/2 7.70 - 3.500 88.9 0.216 5.49 PN PN PN PN PN -
9.20 9.30 0.254 6.45 PUN PUN PUN PNU PNU PUN
  
10.20 - 0.289 7.34 PN PN PN PN PN -
12.70 12.95 0.375 9.53 - PUN PUN PNU PNU PUN
14.30 - 0.430 10.92 - P - P P -
15.50 - 0.476 12.00 - P - P P -
17.00 - 0.530 13.46 - P - P P -
4 9.50 - 4.00 101.6 0.226 5.74 PN PN PN PN PN PN
  
10.70 11.00 0.262 6.65 PU PU PU PU PU PU
4 1/2 12.60 12.75 4.500 114.3 0.271 6.88 PNU PNU PNU PNU PNU -
15.20 - 0.337 8.56 - P - P P -
17.00 - 0.380 9.65 - P - P P -
18.90 - 0.430 10.92 - P - P P -
21.50 - 0.500 12.70 - P - P P -
23.70 - 0.560 14.22 - P - P P -
26.10 - 0.630 16.00 - P - P P -
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