SY/T 5396-2000 On-site inspection and transportation of petroleum casing
Some standard content:
ICS75.180.01
Registration number: 8146--2001
Petroleum and natural gas industry standard of the People's Republic of ChinaSY7T 53962000
Well - site transportation and inspection criterion for oil casing2000-12—12Release
State Bureau of Petroleum and Chemical Industry
2001-06-01Implementation
SY/T 5396—2000
Cited standards
3Inspection items
Inspection methods
Transportation and storage.
SY/T 5396--2000
This standard is a combination of SY5396--91 Casing Field Inspection Method and SY5577--93 Casing Loading, Unloading, Transportation and Storage Technical Requirements. This standard retains the contents of SY5396--91 and SY5577-93 that have been proven to meet the requirements of oil casing field inspection, storage and transportation in practice, and re-arranges its format, structure, level and clauses, and adds clauses such as casing straightness and coupling outer diameter deviation
From the date of entry into force, this standard replaces SY5396--91 and SY5577-93 at the same time. This standard is proposed by China National Petroleum Corporation: This standard is under the jurisdiction of the Petroleum Drilling Engineering Professional Standardization Committee. This standard was drafted by: Downhole Operations Department of Sichuan Petroleum Administration Bureau. The main drafters of this standard are Li Yi, Liu Shijie, and Luo Fangjian. 1 Scope Petroleum and Natural Gas Industry Standard of the People's Republic of China Site Inspection and Transportation of Oil Casing SY/T 5396—2000 Replaces SY 5396—91 SY 557793 Welf- site transportation and inspection criterion for oil casing This standard specifies the site inspection items, methods, storage and transportation of oil casing. This standard is applicable to the inspection of oil casing in casing yards (pipe stations) and well sites. This standard is applicable to the onshore and offshore transportation of oil casing. 2 Referenced Standards The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest version of the following standards: GB/T 9253.2-1999 Processing, measurement and inspection of casing, tubing and line pipe threads in the oil and gas industry 3 Inspection items
3.1 Inspection items at the casing site (pipe station)
a) Appearance of coupling, pipe body and thread;
b) Steel grade and wall thickness:
c) First line diameter;
d) Length:
e) Taper;
f) Internal diameter:
g) Thread machine tightness:
h) Close distance;
i) Flaw detection:
) Small hydrostatic pressure test.
3.2 Wellsite inspection items
a) Surface defects of coupling, pipe body and thread; h) Steel grade and wall thickness;
c) Straightness;
d) Length:
e) Internal diameter;
3.3 Inspection items and methods for special threaded casing shall be inspected in accordance with the inspection items and methods specified or recommended in the order contract. 4 Inspection method
4.1 Appearance of coupling, pipe body and thread
4.1.1 Inspection and regulations of coupling appearance
National Petroleum and Chemical Industry Flat 2H00-[2-12 Approved 2001-06-01 Implementation
4.1.1.1 Coupling outer diameter deviation
a) Round thread casing coupling:
SY/T5396-2000
1) For all casing couplings of H, J, K, N, C, L, T, and P steel grades, the allowable deviation of the outer diameter is 1%, but not more than ±3.175mm;
2) For all casing couplings of Q steel grade, the allowable deviation of the outer diameter is 1%, but not more than +3.175nb) Standard coupling of trapezoidal thread casing:
1.588mm.
1) For all casing couplings of H, J, K, N, C, L, T, P steel grades, the outer diameter tolerance is ±1%, but not more than ±3.175mm;
2) For all casing couplings of Q steel grade, the outer diameter tolerance is ±1%, but not more than +3.175mm c) Special clearance couplings for trapezoidal threaded casing: 1.588mm
For all casing couplings of H, J, K, N, C, L, T, P steel grades, the outer diameter tolerance is +0.794mm. -0.4
4.1.1.2 Coupling surface
a) There shall be no visible cracks, fissures and pores; b) If there are pits, round-bottom gouges and similar defects on the coupling surface, they shall not exceed the values specified in Table 1 (measured from the original surface or the contour line above the defect).
c) If there are clip marks, pointed chisel marks and similar imperfections, they shall not exceed the values specified in Table 2 (measured from the original surface or the contour line above the imperfection).
Table 1 Permissible values for pits, round-bottom chisel marks and similar defects Matching pipes for couplings
mm(in)
≤139.7(5%)
168.3(6%), 177.8(7), 193.7(75%)≥219.1(8%)
Permissible depth of defects
Table 2 Permissible values for clamp marks, pointed-bottom chisel marks and similar defects Matching pipes for couplings
mm(in)
139.7(5%)
≥168.3(6%)
Permissible depth of defects
d) The inner and outer edges of the bearing end face shall be rounded or chamfered, but shall not affect the bearing face width 6 (see Figure 1). The dimensions of 6b are shown in Table 3. The two end faces of the coupling shall be perpendicular to the axis. e) The thread shall not have continuity defects.
Coupling bearing end face
Specification size1)
mm(in)
114.3（4%)
139.7 (5%)
168.3(6%)
193.7(7%)
219.1（8%)
244.5(95%)
273.1(10%)
298.5 (11%)
339.7（13%)
406.4(16)
473.1(18%)3)
508.0(20）
SY/T5396—2000
Table 3 Bearing surface width size
Coupling outer diameter 2)
1) The coupling specification is the same as the corresponding casing specification. Round thread
Bearing surface width 6
Trapezoidal thread
2) The outer diameter of the coupling is the same as the outer diameter of the API standard coupling, and the bearing surface width of the special gap casing coupling of the trapezoidal thread is the same as the bearing surface width 6 value of the same specification size of the trapezoidal thread in the table.
3) Only applicable to API standard H, J, K, N steel grade casing 4.1.1.3 Casing coupling defect treatment
a) It is not allowed to remove any defects by repair welding; b) When the defects are removed or reduced to acceptable limits by machining or grinding, the outer diameter tolerance of the coupling must meet the requirements and should smoothly transition to the outer contour line of the coupling. 4.1.2 Inspection and regulations of pipe body appearance
4.1.2.1 Allowable deviation of pipe body outer diameter:
a) When the outer diameter is less than or equal to 101.6mm (4in), the allowable deviation is ±0.79mm; when the outer diameter is greater than 114.3mm (4%in), the allowable positive deviation is +1.00% and the negative deviation is -0.50%, but the upper limit tolerance should not exceed 3.175mm. b) For thickened casing of 139.7mm (5% in) and less, the deviations listed in Table 4 apply to the outer diameter of the pipe body within a distance of approximately 127mm immediately after the thickened portion; for thickened casing greater than 139.7mm (5% in), the deviations listed in Table 4 apply to the outer diameter of the pipe body within a distance approximately equal to the outer diameter of the pipe body immediately after the thickened portion. c) Calipers or outside diameter gauges are used to measure the outer diameter of the pipe body. 4.1.2.2 Allowable deviation of pipe body weight:
a) Allowable deviation of the weight of a single casing body: 7% to -3.5%. b) Allowable deviation of the weight of a batch of casing on a vehicle: -1.75% (the minimum load on a vehicle is 18144kg). 4.1.2.3 The outer surface of the pipe should not have any defects, such as hairline, folds, cracks, scratches, abrasions, grooves, etc., and the depth cannot exceed 12.5% of the specified wall thickness.
Pipe outer diameter
26.7.-88.9
114.3--127
139.7.-219.1
4.1.2.4 Treatment of pipe body defects:
SY /T 5396-240
Table 4 Permissible deviation of pipe body outer diameter
a) Eliminate by grinding, the remaining wall thickness cannot be less than 87.5% of the specified wall thickness; Permissible deviation of pipe bodywwW.bzxz.Net
b) The defective pipe section can be cut off, and the length of the casing after cutting should meet the length requirements; -0.79
c) When the reduced wall thickness of the defective casing is greater than 12.5% of the specified wall thickness or the remaining wall thickness is less than 87.5% of the specified thickness, it should be collected and no merging is allowed.
4.1.3 Inspection and regulations of thread appearance
4.1.3.1 The geometric dimensions of the thread shall comply with the provisions of GB/T9253.2. 4.1.3.2 The depth of the defect of incomplete thread LN (see Figure 2) shall not extend below the taper angle of the thread root or extend beyond 12.5% of the specified wall thickness (measured from the surface of the extended end pipe). Figure 2 Thread gauge
4.1.3.3 Inspection of the first thread 1-c (see Figure 2): a) The minimum Lc value of short round thread casing is shown in Table 5. b) The minimum Lc value of long round thread and trapezoidal thread casing is shown in Table 6. c) Damage: Only one pitch is allowed to be damaged, and the depth of any damaged pitch shall not exceed 0.5rmurt and the length shall not exceed 5mm. d) Broken teeth: 1 broken tooth is allowed, the length shall not exceed 2mm and the depth shall not exceed 0.5mm. Broken teeth caused by cracks or folding extension of the pipe body are not allowed.
e) Black top thread: One black top thread is allowed in the round thread, and the black top thread is: - a point or a line: The trapezoidal thread only allows 2 black top threads in the LC segment, and the length of these black top threads does not exceed 25% of the circumference of the thread. 1) Deformed thread: The thread cannot be twisted, corrugated or the geometric dimensions do not meet the requirements. 2) Chamfer burr: There should be no burrs on the inner and outer edges of the pipe end after chamfering. J) Rust: No pits or pits that affect the roughness of the thread can be formed on the side of the thread. 4.2 Straightness
Use a tape measure to check the straightness of the pipe. The deviation of the pipe from the straightness should not exceed the following requirements: a) (.2% of the total length of the pipe (measured from one end to the other end); 4
SY/T 5396-2000
b) It should not exceed 3.18mm (0.125in) within the length range of 1.53m (5ft) at both ends of the pipe;) The thickened part, thickened transition area or coupling does not need to be measured for deviation. 4.3 Steel grade
4.3.1 Spot check 5%~10% of the number of roots.
4.3.2 Check the steel grade mark printed by steel stamp or paint stamp on the surface of the coupling. 4.3.3 Use a spectrometer or hardness tester to verify the steel grade. 4.3.4 Identify the steel grade from the color mark, see Table 7 4.3.5 Identify the steel grade from the paint or steel stamp on the pipe body surface near the coupling. 4.4 Wall thickness
4.4.1 Check 5%~10% of the pipes by number.
4.4.2 Check the wall thickness of the paint stamp on the pipe body surface. Table 5 Minimum Lc value of short round thread casing
Casing outer diameter
Imm (in)
114.3 (4k)
127.0 (5)
139.7(5 years old）
168.3 (656)
177.8 (7)
193.7 (7%)
219.1 (8%)
244.5 (9%)
273.1 (104)
298.5 (11%)
339.7 (133%)
406.4 (16)
473.1 (18%)
508.0 (20) | |tt | -56.60
35, 70 ~ 70. 10
41.70--72.90
48.10) - 74.60
60.30 ~ 82.60
75.90 ~ 97.80
62.50 --89.30
71 .40 - 107. 02
101.20,107.20
96.70 -125.00
140.0 --198.1
casing outer diameter
mm(in)
114.3(4%)
139.7(5%)
168.3(6%)
193.7(7%)
219.1(8%)
244.5(9%)
273.1 (10%)
298.5(113/）
339.7（1336）
406.4(16)
473.1(18%)
508.0(20)
SY/T5396—2000
Table 6 Minimum Lc value wall thickness of long round thread and trapezoidal thread casing
1）Number of teeth of trapezoidal thread in brackets
L80-9Cr
L8 0-13Cr
4.4.3 When using ultrasonic thickness gauge to check wall thickness Table 7
Number of threads 1)
Threads/25.4mm
Long thread
8（6)
8（6)
8（6)
8（6)
8（6)
Color marking of steel grade
Color marking
Colorless or black
Bright green ring With
two bright green bands
red band
red and brown band or longitudinal strip
red and two yellow bands
red and one yellow band
purple or one purple band
brown or one brown band
silver or one silver band
the allowable tolerance of the casing wall thickness is -12.5% of the specified wall thickness; 6
trapezoidal thread
bright green band|| tt||Two bright green bands
Red band
One red band and one brown band
One red band, one brown band and two yellow bandsOne red band, one brown band and one yellow bandOne purple band
One brown band
One silver band
SY/T5396—2000
Measurement of wall thickness is specified at 1.5m from both ends of the casing and in the middle, with three sections measured in total, and four symmetrical points measured in each section. 4.5 Internal diameter
4.5.1 Use cylindrical diameter gauge to pass the internal diameter, and the chamfer at the front end of the diameter gauge should be smooth. Its specifications are shown in Table 8. 4.5.2 Use manual or mechanical methods to pass the diameter. The diameter gauge can pass the casing freely after entering from the end face of the coupling. There should be no foreign matter inside the casing during the diameter passing, and it should be properly supported to prevent the casing from sagging and bending. 4.5.3 When testing the inner diameter of some special threads (such as VAM threads, etc.), the female thread guard cannot be removed to prevent damage to the thread and sealing step.
Table 8 Gauge size
Casing outer diameter
mm(in）
≤219.1（8%)
244.5-339.7（9%133%)
≥406.4（16）
4.6 Thread machine tightness
4.6.1 Spot check according to 5%~10% of the number of roots.
4.6.2 Round thread casing:
Gauge length
a) Check N, value and J value, see Figure 3. J value specified size see Table 9. b) N value ≤L4±2 teeth, value deviation ±2 teeth. L4 value specified size see Table 9. Casing
Figure 3 Round thread inspection value
Table 9 J value and L4 value of round thread casing
Casing outer diameter
mm(in)
114.3（4/）
139.7（5%)
168.3（6%）
Short thread
Drift gauge diameter (smaller than the inner diameter of the casing
Long thread
Casing outer diameter
tnm (in）
177.8 (7)
193.7 (7%)
219.1 (8%)
244.5(95%)
273.1 (10%)
298.5 (11%)
339.7（133%6）
4h6.4(16)
473.1 (1856)
508.0 (20)
Partially trapezoidal thread casing:
SY/T $396—2000
Table 9 (End)
Short thread
Long butterfly pattern
a) The minimum tightening position is one tooth behind the bottom edge of the triangle symbol from the end face of the coupling to the vanishing point of the external thread (see Figure 4) b) The maximum tightening position does not exceed the triangle symbol item point from the end face of the coupling to the fire extinguishing point of the external thread (see Figure 4). Triangle symbol
Figure 4 Trapezoidal thread
4.7 Taper
4.7.1 See Table 10 for the selection of taper gauge model.
Table 10 Taper gauge model
Outer diameter of measured casing
mm(in)
114.3139.7 (4% -53)
114.3 --219.7 (4/2 --85%)
External thread
Taper gauge model
Internal thread
Outer diameter of measured casing
mm (in)
177.8 ~ 339.7 (7 ~ 13%)
114.3 ~ 355.5 (4V -14)
See Table 11 for the selection of taper gauge contact.
习/25.4mml
Head diameter
Contact model
4.7.3 Inspection steps are as follows:
SY/T 5396--2000
Table 10 (Complete)
External thread
Taper gauge model
Table 11 Taper gauge contact selection
Round thread casing
a) Select the appropriate taper gauge and contact according to the size of the thread; b) Make the starting point measurement mark and confirm the position of the contact; Internal thread
Partial trapezoidal thread casing
32090S
c) Measure When measuring the taper of external threads, adjust the adjusting arm of the taper gauge to the position corresponding to the outer diameter of the thread and fix it: d) When measuring the taper of internal threads, install the internal thread taper gauge with a suitable extension arm to adapt to the thread size to be checked: e) Place the taper gauge contact in the groove at the position of the first full-crest thread; keep the fixed contact stationary, and slide the moving contact in a small arc; adjust the dial on the taper gauge table so that the zero position coincides with the maximum reading, and then measure along the set measuring positions in sequence; the measuring spacing is 25.4rnml (1in). If the thread of the small diameter pipe is not sufficient to provide a spacing of 25.4mm (1in), it can be reduced to a spacing of 12.7nim (1/2in) to measure its taper and record the reading on the table; after the measurement, place the taper gauge in the first full-crest thread groove for the second time. If the reading on the table is still at zero, the thread taper measurement is completed, otherwise readjust and measure again until it is accurate: f) Press 5%-10% root Number of spot checks:
4.7.4 Taper deviation:
a) Kitchen thread sleeve arm: 5.208/1000--2.600/1000: b) Trapezoidal thread casing see Table 12
Casing outer diameter
Trapezoidal thread casing taper deviation
External thread
Complete thread
4.8 Thread close distance
13.50/100
-1. 5(1/100]
Incomplete thread
+ 4.50/1000
- 1.50/100)
Internal thread
1 4.50/1000
-2.50/1000
Close distance measurement, gauge use, re-inspection, identification and transfer shall comply with the provisions of C:B/T0253.2 and be inspected as needed. 4.9 Flaw detection
Non-destructive flaw detection shall be carried out on couplings, pipe bodies and threads, and 5% to 10% of the number of threads shall be sampled for storage. 4.10 Hydrostatic pressure test10 Hydrostatic pressure test10 Hydrostatic pressure test
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