API Spec 5ct Q125 Casing Tube

API Spec 5ct Q125 Casing Tube

The oil special pipe is mainly used for drilling oil and gas well and transporting oil and gas, It includes oil drill pipe, oil casing and oil suction pipe. The oil drill pipe is mainly used to connect drill collar and drill bit and transmit drilling power.
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Product Details

API spec 5ct Q125 Casing Tube

     The oil special pipe is mainly used for drilling oil and gas well and transporting oil and gas,

It includes oil drill pipe, oil casing and oil suction pipe. The oil drill pipe is mainly used to connect drill collar and drill bit and transmit drilling power. The oil casing is mainly used to support the wellbore during drilling and completion, so as to ensure the normal operation of the whole well after completion of the drilling process. The tubing mainly transfers the oil and gas at the bottom of the oil well to the ground.

Oil casing is the lifeline of maintaining oil well operation. Due to the different geological conditions, the downhole stress state is complex, and the combined action of pulling, pressing, bending and twisting stresses acts on the pipe body, which puts forward higher requirements for the quality of the casing itself. Once the casing itself is damaged for some reason, the whole well can be reduced or even scrapped.

weight 

[(outer diameter-wall thickness) * Wall thickness]*0.02466=kg/m (weight per meter)

chemical composition

(1) according to SY/T6194-96 regulations. The casing and its coupling are of the same steel grade. Sulphur content < 0.045%, phosphorus content < 0.045%;

(2) Chemical analysis samples were taken according to GB/T222-84. Carry out chemical analysis according to the relevant part of GB223;

(3) the first edition of the American Petroleum Society (API SPEC 5CT 1988). Chemical analysis according to the latest version of ASTME59 sample, according to the latest version of ASTME350 chemical analysis.

physical property

(1) according to SY/T6194-96 regulations. Flattening test (GB246-97) tension test (GB228-87) and hydraulic test;

(2) hydrostatic pressure test, flattening test, sulfide stress corrosion cracking test, hardness test (ASTME18 or E10 latest version), tensile test, transverse impact test (ASTMA370, ASTME23 and the latest version of the relevant standards), and grain size determination, according to the first edition of APISPEC5CT1988.

technical specifications

The main results are as follows:

(1) according to SY/T6194-96, the length of domestic casing is not fixed, and its range is 8-13 m. However, not less than 6 m of casing can be provided, its number shall not exceed 20.

(2) the inner and outer surfaces of the casing shall not be folded, striated, separated, cracked, flattened and scarred. These defects should be completely removed, and the depth of removal shall not exceed the nominal wall thickness of 12.5.

(3) the outer surface of the coupling shall not have such defects as folding, hairline, layer separation, crack, rolling, scarring and so on.

(4) the surface of the casing and hoop threads shall be smooth and shall not allow burr, tear and other defects sufficient to affect the strength and tight connection of the thread.

external diameter

theoretical weight

wall thickness

bore size

latus rectum

Collar outer diameter

Thread type

Steel grade

length

139.7

(5-1/2)

20.85(0.244)

23.09(15.50)

25.32(17.00)

29.79(20.00)

34.26(23.00)

6.20(0.244)

6.98(0.275)

7.72(0.304)

9.17(0.361)

10.54(0.415)

127.3(5.012)

125.7(4.950)

124.3(4.892)

121.4(4.778)

118.6(4.670)

124.1(4.887)

122.6(4.825)

121.1(4.767)

118.2(4.653)

115.4(4.545)

153.7

(6.050)

knuckle thread

Ladders thread

j55

n80

p110

8m-12m

(2602-39.4)

177.8

(7)

25.52917.00)

29.79(20.00)

34.26(23.00)

38.73(26.00)

43.20(29.00)

47.66(32.00)

52.13(35.00)

56.60(38.00)

5.87(0.231)

6.91(0.272)

8.05(0.317)

9.19(0.362)

10.36(0.408)

11.51(0.453)

12.65(0.498)

13.72(0.540)

166.1(6.538)

164.2(6.456)

161.7(6.366)

159.4(6.276)

157.1(6.180)

154.8(6.090)

152.5(6.004)

150.4(5.430)

162.9(6.413)

160.8(6.331)

158.5(6.204)

156.2(6.151)

153.9(6.059)

151.6(5.969)

149.3(5.879)

147.2(5.795)

194.5

(7.656)

knuckle thread

Ladders thread

j55

n80

p110

8m-12m

(2602-39.4)

219.1

(8-5/8)

35.75(24.00)

41.71(28.00)

47.66(32.00)

53.62(36.00)

59.58(40.00)

6.71(0.264)

7.72(0.304)

8.94(0.352)

10.16(0.400)

11.43(0.450)

205.7(8.093)

203.7(8.020)

201.2(7.927)

198.8(7.827)

196.2(7.724)

202.5(7.972)

200.5(7.894)

198.0(7.795)

195.6(7.701)

193.0(7.598)

244.5

(9.625)

knuckle thread

Ladders thread

j55

n80

p110

8m-12m

(2602-39.4)

244.5

(9-5/8)

48.11(32.30)

53.62(36.00)

59.58(40.00)

64.79(43.50)

70.01(47.00)

71.69(53.50)

7.92(0.312)

8.94(0.352)

10.03(0.395)

11.05(0.435)

11.99(0.472)

13.84(0.545)

228.7(9.001)

226.6(8.921)

224.4(8.835)

222.4(8.755)

220.5(8.681)

216.8(8.535)

244.7(8.845)

222.6(8.765)

220.4(8.679)

218.4(8.599)

216.5(8.525)

212.8(8.379)

269.6

(10.6250

knuckle thread

Ladders thread

j55

n80

p110

8m-12m

(2602-39.4)

273.0

(10-3/4)

48.78(32.75)

60.32(40.50)

67.77(45.50)

75.96(51.00)

82.67(55.50)

7.09(0.279)

8.89(0.350)

10.26(0.400)

11.43(0.450)

12.57(0.495)

258.9(10.192)

255.3(10.050)

252.7(9.950)

250.2(9.850)

247.9(9.760)

254.9(10.035)

251.3(9.894)

248.8(9.794)

246.2(9.694)

243.9(9.604)

298.5

(11.752)

knuckle thread

Ladders thread

j55

n80

p110

8m-12m

(2602-39.4)

339.7

(13-3/8)

71.50(48.00)

81.18(54.50)

90.86(61.00)

101.69(68.00)

8.38(0.330)

9.65(0.380)

10.92(0.430)

12.19(0.480)

322.9(12.715)

320.4(12.615)

317.9(12.515)

315.3(12.415)

319.0(12.559)

316.5(12.459)

313.9(12.359)

311.4(12.259)

365.1

(14.374)

knuckle thread

Ladders thread

j55

n80

p110

8m-12m

(2602-39.4)

73.0

(2-7/8)

9.53(6.40)

11.62(7.90)

12.81(8.60)

5.51(0217)

7.01(0.276)

7.82(0.308)

62.00(2.441)

59.00(2.323)

57.40(2.259)

59.61(2.347)

56.62(2.229)

54.99(2.165)

88.9

(3.500)

knuckle thread

j55

n80

8.5m-9.5m

(27.9-31.2)

88.9

(3-1/2)

11.47(7.70)

15.19(10.20)

5.49(0.216)

7.34(0.289)

77.9(3.067)

76.0(2.992)

24.25(2.943)

21.04(2.797)

107.95

(4.250)

knuckle thread

j55

n80

8.5m-9.5m

(27.9-31.2)

114.3

(4-1/2)

18.77(12.60)

6.88(0.271)

100.5(3.957)

97.37(3.833)

132.08

(5.200)

knuckle thread

j55

n80

8.5m-9.5m

(27.9-31)

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