The Benefits of Using casing tube for Oil and gas Exploration

Casing tube is an essential tool for oil and gas exploration. It is used to protect the wellbore from collapsing and to prevent the contamination of the oil and gas reserves. Casing tube also helps to maintain the integrity of the wellbore and to ensure that the oil and gas reserves are not lost due to the collapse of the wellbore.

Tensile and Hardness Requirements
grade     Yield Strength MPa Tensile Strength Hardness a,c specified Wall thickness Allowable Hardness Variation b
  Type Total Elongation Under Load   min MPa max    
      min max   HRC HBW mm HRC
1 2 3 4 5 6 7 8 9 10
H40 0.5 276 552 414
J55 0.5 379 552 517
K55 0.5 379 552 655
N80 1 0.5 552 758 689
N80 Q 0.5 552 758 689
R95 0.5 655 758 724
L80 L80 1 0.5 552 655 655 23 241
L80 9Cr 13Cr 0.5 552 655 655 23 241
    0.5 552 655 655 23 241
C90 1 0.5 621 724 689 25.4 255 £12.70 3
                12.71 to 19.04 4
                19.05 to 25.39 5
                ³ 25.40 6
T95 1 0.5 655 758 724 25.4 255 £12.70 3
                12.71 to 19.04 4
                19.05 to 25.39 5
                ³ 25.40 6
C110 0.7 758 828 793 30 286 £12.70 3
                12.71 to 19.04 4
                19.05 to 25.39 5
                ³ 25.40 6
P110 0.6 758 965 862
Q125 1 0.65 862 1034 931 b £12.70 3
                12.71 to 19.04 19.05 4
                  5
a In case of dispute, laboratory Rockwell C hardness testing shall be used as the referee method.
b No hardness limits are specified, but the maximum variation is restricted as a manufacturing control in accordance with 7.8 and 7.9.
c For through-wall hardness tests of grades L80 (all types), C90, T95 and C110, the requirements stated in HRC scale are for maximum mean hardness number.
Labels a           Calculated Mass c
    Nominal Linear Mass T& C b,c Wall Thick- ness       em, Mass Gain or Loss Due to End Finishing d
  Outside Diameter     Inside Diameter Drift Diameter Plain- end kg
              round Thread Buttress Thread
            wpe        
  D kg/m t D mm kg/m Short Long RC SCC
  mm   mm mm            
1 2 3 4 5 6 7 8 9 10 11 12
13 3/8 48 339.72 71.43 8.38 322.96 318.99 68.48 15.04 — 17.91
13 3/8 54.5 339.72 81.1 9.65 320.42 316.45 78.55 13.88 16.44
13 3/8 61 339.72 90.78 10.92 317.88 313.91 88.55 12.74 14.97
13 3/8 68 339.72 101.19 12.19 315.34 311.37 98.46 11.61 14.97
13 3/8 68 339.72 101.19 12.19 315.34 311.37 98.46 11.67 f 14.33
13 3/8 72 339.72 107.15 13.06 313.6 311.15 e 105.21 10.98 13.98
13 3/8 72 339.72 107.15 13.06 313.6 311.15 e 309.63 309.63 105.21 10.91 f 14.33
13 3/8 72 339.72 107.15 13.06 313.6   105.21 10.98 13.98
13 3/8 72 339.72 107.15 13.06 313.6   105.21 10.91 e  
16 65 406.4 96.73 9.53 387.4 382.57 96.73 18.59 — 20.13
16 75 406.4 111.61 11.13 384.1 379.37 108.49 16.66 18.11
16 84 406.4 125.01 12.57 381.3 376.48 122.09 14.92
16 109 406.4 162.21 16.66 373.1 368.3 160.13  
18 5/8 87.5 473.08 130.21 11.05 450.98 446.22 125.91 33.6 39.25
20 94 508 139.89 11.13 485.7 480.97 136.38 20.5 27.11 24.78
20 94 508 139.89 11.13 485.7 480.97 136.38 20.61 27.26 g 24.27 17.84 24.78
20 106.5 508 158.49 12.7 482.6 477.82 155.13 18.22   22
20 133 508 197.93 16.13 475.7 470.97 195.66 13.03   16.02
NOTE See also Figures D.1, D.2, and D.3.
a Labels are for information and assistance in ordering.
b Nominal linear masses, threaded and coupled (Column 4) are shown for information only.
c The densities of martensitic chromium steels (L80 Types 9Cr and 13Cr) are less than those of carbon steels; The masses shown are therefore not accurate for martensitic chromium steels; A mass correction factor of 0.989 shall be used.
d Mass gain or loss due to end finishing; See 8.5.
e Drift diameter for most common bit size; This drift diameter shall be specified in the purchase agreement and marked on the Pipe; See 8.10 for drift requirements.
f Based on 758 mPa minimum yield strength or greater.
g Based on 379 mPa minimum yield strength.

The use of casing tube offers a number of benefits for oil and gas exploration. Firstly, it helps to ensure that the wellbore remains stable and secure. This is important as it helps to prevent the collapse of the wellbore, which can lead to the loss of the oil and gas reserves. Secondly, casing tube helps to protect the wellbore from contamination. This is important as it helps to ensure that the oil and gas reserves remain uncontaminated and can be extracted safely.

Thirdly, casing tube helps to maintain the integrity of the wellbore. This is important as it helps to ensure that the oil and gas reserves are not lost due to the collapse of the wellbore. Finally, casing tube helps to reduce the risk of accidents and injuries during oil and gas exploration. This is important as it helps to ensure that the exploration process is conducted safely and without any risks to personnel or the environment.

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In conclusion, the use of casing tube for oil and gas exploration offers a number of benefits. It helps to ensure that the wellbore remains stable and secure, protects the wellbore from contamination, maintains the integrity of the wellbore, and reduces the risk of accidents and injuries during exploration. Therefore, it is essential for oil and gas exploration and should be used whenever possible.

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