1. Certification and Application
Certification GB/T19001-2008 , ISO9001:2008, GB/T24001-2004 , ISO14001:2004, GB/T28001-2001 , OHSAS18001
Tubing
Function The tubing is a channel to collect the oil and gas from the bottom to the mouth of a well.
Outer Diameter 26.67(1.05"), 33.40(1.315"), 42.16(1.66"), 48.26(1.9"), 60.3(2 3/8"), 73.02(2 7/8"), 88.9(3 1/2"), 101.6(4"), 114.3(4 1/2")
Among them, such specifications as 60.3, 73.02 and 88.9NU or EU occupy the overwhelming majority.
Casing Tube
Function Our casing tube can prevent the stratum from collapsing and protect the tubing. Through the packer, this casing tube and tubing can help separate the oil and gas layer from the annular space.
Classification Surface casing, production casing(also called oil string casing), intermediate casing(used for abnormal pressure)
Outer Diameter 114.3(4 1/2"), 127(5"), 139.7(5 1/2"), 168.28(6 5/8"), 177.8(7"), 193.68(7 5/8"), 219.08(8 5/8"), 244.48(9 5/8"), 273.05(10 3/4"), 298.45(11 3/4"), 339.73(13 3/8"), 406.40(16"), 473.08(18 5/8"), 508(20")
Among them, such specifications as 139.7,177.8,9 5/8"LC,STC,BC make up the overwhelming majority.
2. Steel Grade of Tubing and Casing Tube
Steel Grade The first group H40, J55, K55, N80 tubing and casing tube
The second group C90, C95, L80, M65 and T95 tubing and casing tube
The third group P110 tubing and casing tube
The fourth group Q125 tubing and casing tube(unavailable)
3. Thread Type and Code
Tubing
Flat Tubing (Non Upset) NU (Former name is TBG or NUE)
External Upset Tubing EU (Former name is UP TBG or EUE)
Integral Joint Tubing IJ (Former name is IJ TBG)
Casing Tube
Long Round Thread Casing LG (Former name is LCSG or LTC)
Short Round Thread Casing STC (Former name is CSG or STC)
Buttress Thread Casing BC (Former name is BCSG or BTC)
Extreme Line Thread Casing XC (Former name is XCJG)
4. Characteristics of Thread Form
Tubing and Round Thread Casing Tube
Thread Shape Round Thread
Both root and crest of our thread are arc shaped.
Taper 1:16
Thread Angle 60°
Flank Angle 30°
Pitch 3.175 and 2.54 (8 teeth and 10 teeth per inch)
Notice The glass fiber tubing utilizes the external upset long round thread tubing.
Buttress Thread Casing Tube
Taper Below 13 3/8" 1:16
Over 16" 1:12
Pitch 5.08 (5 teeth per inch)
Thread height 1.575
Flank Angle 3° and 13°
Thread Form Angle 13°
Attention Under the condition of below 13 3/8", both root and crest of the thread can be parallel to the generating line. Under the condition of over 16", both root and crest of the thread should be parallel to the axis.
Extreme Line Thread Casing Tube
Thread Form It belongs to the special thread, which is rarely encountered.
5. Length Range of Oil Casing Tube
Range 1 (m) Range 2 (m) Range 3 (m)
Casing Tube and Liner Tube
Total Length Range
Length Range of 95% and Larger Carrying Capacity: a
Maximum Allowable Amount of Change
Minimum Allowable Length
4.88~7.62 1.83 5.49 7.62~10.36 1.52 8.53 10.36~14.63 1.83 10.97
Tubing and the Casing Tube used as Tubing
Overall Length Range b
Length Range of 100% Carrying Capacity: a
Maximum Allowable Amount of Change
6.10~7.32b 0.61 8.53~9.75c 0.61 11.58~12.80d 0.61
Integral Joint Tubing (including IJ/UF and IJ/SF)
Overall Length Range
Length Range of 100% Carrying Capacity: a
Maximum Allowable Amount of Change
6.10~7.92b 0.61 8.53~10.36 0.61 11.58~13.72 0.61
Short Section Length: 0.61 , 0.91 , 1.22 , 1.83 , 2.44 , 3.05 , 3.66e Tolerance: ± 0.076
a means that the tolerance limit of length range is not suitable for the contract item with the pipe order quantity of less than 18144kg. It can be appropriate for every vehicle with the carrying capacity of 18144kg or above, if this vehicle can directly reach the final destination without the transshipment or unloading. If the pipe with the order quantity of more than 18144kg is delivered from the factory by train but can not directly reach the final destination, the tolerance limit of length range will be suitable for the total order quantity but not for the single carriage.
b refers that through the consultation between the buyer and the manufacturer, the maximum length can be increased to 8.53m.
c means that the extreme length can be increased to 10.36m after the manufacturer consulted with the purchaser.
d refers that through the consultation between the buyer and the manufacturer, the maximum length can be increased to 13.72m.
e means that the 0.61m short section can be also increased to 0.91m for delivery through the consultation between the manufacturer and the purchaser. The length not listed on the table can be provided in accordance with the size discussed by the buyer and the manufacturer.
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