CN211206359U - Reference block for electromagnetic ultrasonic automatic detection of in-service oil pipe - Google Patents
Reference block for electromagnetic ultrasonic automatic detection of in-service oil pipe Download PDFInfo
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Abstract
The utility model belongs to the technical field of nondestructive test, a contrast test block for being in labour oil pipe electromagnetic acoustic automated inspection is provided. The comparison test block comprises a pipe body and artificial defects arranged on the pipe body; the artificial defects comprise three types, namely eccentric wear/crack defects for simulating in-service oil pipes, general metal loss defects for simulating in-service oil pipes and crater metal loss defects for simulating in-service oil pipes; through the utility model provides an at labour oil pipe electromagnetic acoustic automated inspection carry out quantitative evaluation problem to the defect of different grade type.
Description
Technical Field
The utility model belongs to the technical field of nondestructive test, a contrast test block for being in labour oil pipe electromagnetic acoustic automated inspection is related to.
Background
The in-service oil pipe belongs to a steel column pipe of an underground channel, is applied to links such as water injection, building and the like in the oil exploitation process, can be repeatedly used, and can be put in and taken out. In the using process, an in-service oil pipe can be bent due to various reasons, such as the influence of external environments such as stretching, acidification, fracturing and high temperature on the oil pumping pipe, and the effects of a piston effect, a spiral effect, an expansion effect and the like. The oil pumping pipe can directly cause the sucker rod to bend after bending, then the sucker rod and the wall of the oil pipe are abraded, oil production is finally influenced, the oil well has to be shut down and stopped under the condition that oil is not produced, and huge economic loss is caused for oil field enterprises.
In order to grasp the wear and tear condition of the oil pipe in time, the oil pipe needs to be detected regularly, and the existing main detection technology is a nondestructive detection technology. The current nondestructive testing technology of in-service oil pipes mainly comprises the following steps: penetrant testing, magnetic particle testing, magnetic flux leakage testing, eddy current testing, and electromagnetic ultrasonic testing. The penetration detection method is mainly used for detecting the surface opening defect of the non-shrinkage-cavity material, is suitable for any material and is difficult to realize automatic detection. The magnetic particle detection method is mainly used for detecting defects on the surface and near surface of a ferromagnetic material, is only suitable for the ferromagnetic material, and is difficult to realize automatic detection. The magnetic leakage detection method is mainly used for detecting defects on the surface and near surface of a ferromagnetic material, is only suitable for the ferromagnetic material, and is easy to realize automatic detection. The eddy current detection method is mainly used for detecting the defects of the surface and the near surface of the conductive material, is only suitable for the conductive material and is easy to realize automatic detection. The electromagnetic ultrasonic detection method is basically the same as the conventional ultrasonic detection method, is mainly suitable for material surface and internal defects, has different mechanisms of generating ultrasonic waves, and has the characteristics of non-contact detection, no need of a coupling agent, high detection speed, easiness in realizing automatic detection, capability of realizing high-temperature detection and the like.
The defects of cracks, holes, corrosion, abrasion and the like exist in the oil pipe in service to different degrees, and the defects are subjected to the action of alternating load for a long time and are easy to generate fatigue damage, so that the oil pipe is leaked and even broken, and the oil extraction cost is greatly increased. The defects of the in-service oil pipe have surface defects and internal defects, so that only the electromagnetic ultrasonic detection technology is most reliable in the nondestructive detection technology of the in-service oil pipe at present, the electromagnetic ultrasonic detection technology can accurately detect, evaluate and analyze the defects of corrosion pits, holes, eccentric wear of the pipe wall and the like on the inner wall of the in-service oil pipe, and provides scientific basis for selective replacement of the in-service oil pipe. However, the content of how to quantitatively detect the defects of the oil pipe in service by adopting an electromagnetic ultrasonic detection mode is not related in domestic and foreign standards (such as GB/T20935.1-3-2007, ASTM E1774-96, ASTME1962-2004, ASTM E1816-2007 and the like) of relevant electromagnetic ultrasonic detection.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem in the background art, the utility model provides a contrast test block for being on active service oil pipe electromagnetic ultrasonic automated inspection has solved on active service oil pipe electromagnetic ultrasonic automated inspection and has detected and quantitative evaluation problem to the defect (like crackle, hole, corruption, eccentric wear etc.) of different position and different grade type.
In order to achieve the above purpose, the utility model provides a technical scheme is:
a contrast test block for electromagnetic ultrasonic automatic detection of in-service oil pipes is characterized in that: comprises a pipe body and artificial defects arranged on the pipe body;
the artificial defects include three categories, which are respectively:
a. the device is used for simulating the eccentric wear/crack defect in the in-service oil pipe, wherein the eccentric wear/crack defect is formed by a plurality of annular flat-bottom notch grooves arranged on the inner surface of a pipe body, and the annular flat-bottom notch grooves are sequentially arranged along the axial direction of the pipe body;
b. the device is used for simulating a common metal loss defect in an in-service oil pipe, wherein the common metal loss defect is a square flat-bottom notch groove arranged on the inner surface of a pipe body;
c. a a plurality of flat punch combination that is arranged in simulating hole form metal loss defect in labour oil pipe, hole form metal loss defect is for setting up at the body internal surface, a plurality of flat punch combination set gradually along the body axial, and every flat punch combination includes along the radial a plurality of flat holes of seting up of the same circumferencial direction of body.
Furthermore, the number of the circular ring-shaped flat-bottom notches is 4, the widths of the 4 circular ring-shaped flat-bottom notches are 2mm, and the depth of each notch is 20%, 40%, 60% and 80% of the wall thickness of the pipe body in sequence.
Further, the side length of the groove of the square flat-bottom notch groove is 30mm, and the groove depth is 20% of the wall thickness of the pipe body.
Further, the number of the flat bottom hole groups is 3, and each flat bottom hole group comprises 4 flat bottom holes;
the hole depths of the 3 flat-bottom hole groups are respectively 20%, 35% and 50% of the wall thickness of the tube body in sequence;
the hole diameter of all the flat bottom holes is 10 mm.
Further, the distance between two adjacent flat bottom hole groups is larger than the width of the electromagnetic ultrasonic detection probe; the distance between two adjacent flat bottom holes in each flat bottom hole group is larger than the length of the electromagnetic ultrasonic detection probe.
Further, the axial distance between the adjacent circular flat-bottom notches is larger than the width of the electromagnetic ultrasonic detection probe.
Further, the sound permeability, the sound velocity and the sound attenuation of the pipe body material are the same as those of the oil pipe to be detected in service; the pipe body is even in material, free of impurities and free of self defects influencing use, and the thickness and the surface roughness of the pipe body are the same as those of an oil pipe to be detected in service.
Compared with the prior art, the utility model has the advantages that:
the utility model discloses a to the design of the reference test piece of using oil pipe electromagnetic ultrasonic automated inspection in labour, utilize three kinds of different shapes on the reference test piece, the artificial defect of structure (circle shape flat notch, square flat notch, flat hole), the simulation is at defects such as crack, hole, corrosion pit, eccentric wear in using oil pipe, utilizes electromagnetic ultrasonic automated inspection technique to detect the detection of different position and different grade type defect in using oil pipe effectively to can carry out quantitative evaluation to the defect in using oil pipe.
Drawings
FIG. 1 is a simplified structural diagram of a reference block for electromagnetic ultrasonic automatic detection of an in-service oil pipe according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken from the B-B position of FIG. 1;
FIG. 4 is a cross-sectional view taken from the C-C position of FIG. 1;
fig. 5 is a cross-sectional view taken from the position D-D in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
The defects generated in the using process of the in-service oil pipe are mainly cracks, holes, corrosion and eccentric wear, and can be classified into 2 types, namely surface defects and internal defects.
In order to carry out quantitative determination to above-mentioned defect and assess, in labour oil pipe electromagnetism supersound automated inspection technique, the design of reference block is very important, owing to detect in labour and consider factor influences such as coupling, detection speed, the utility model provides a reference block that is used for at labour oil pipe electromagnetism supersound automated inspection is used for solving this problem, and more objective detection and evaluation are at labour oil pipe electromagnetism supersound automated inspection technique.
The sound permeability, sound velocity, sound attenuation and the like of the reference block material should be the same as or similar to those of the workpiece (the oil pipe to be detected) as far as possible. Generally, the material of the reference block is as same as or close to the workpiece to be tested as possible. The manufacturing process can ensure the uniformity of the material, no impurity and no defect affecting the use.
The shape of the reference block should be as simple as possible and can represent the characteristics of the oil pipe in service. The thickness of the reference block is corresponding to the thickness of the oil pipe to be detected, and the surface roughness of the reference block is the same as or similar to that of the oil pipe to be detected.
The artificial defects in the reference block generally adopt artificial reflectors, and the artificial reflectors commonly used in the in-service oil pipe comprise circular flat-bottom notches, flat-bottom holes, square flat-bottom notches and the like, and are mainly used for simulating the defects of eccentric wear, cracks, general metal loss and crater-shaped metal loss of the in-service oil pipe, and as shown in fig. 1, the artificial reflectors can be used for effectively detecting and evaluating various defects existing in the in-service oil pipe.
Artificial defect design for eccentric wear/crack
4 annular flat-bottom notches are designed on the inner surface of the pipe body of a reference block, the width of each notch is 2mm, the length of each notch is the length of the inner circumference of a circle, and the depth of each notch is 20%, 40%, 60% and 80% of the wall thickness of the pipe body respectively, such as ①②③④ in figure 1, such as figure 2 and ①②③④ in figure 3.
Artificial defect design for general metal loss (or single hole) defects
In order to effectively detect and evaluate the defects, square flat-bottom notches are designed on the inner surface of the pipe body of the reference block, the side length of each notch is 30mm, and the depth of each notch is 20% of the wall thickness of the pipe body, such as ⑤ in figure 1, ⑤ in figure 3 and 4.
Artificial defect design for crater metal loss (or dense hole) defects
Three flat bottom hole groups are sequentially arranged on the inner surface of the pipe body of the reference block along the axial direction, each flat bottom hole group comprises 4 flat bottom holes radially arranged along the same circumferential direction of the pipe body, the axial distance e between every two adjacent flat bottom holes is larger than the width of a probe, the radial distance f between every two adjacent flat bottom holes is larger than the length of the probe, the hole depth of each 3 flat bottom hole groups is 20%, 35% and 50% of the wall thickness of the pipe body, and the diameter of each 12 flat bottom holes is 10mm, such as ⑥⑦⑧ groups in fig. 1, ⑥⑦⑧ groups in fig. 3 and as shown in fig. 5.
Design for detecting artificial defects of gate
The method comprises the following steps of setting a starting point of a detection gate to adopt the bottom wave position of a ① -number circular flat-bottom groove or the position 1-2 mm after the initial pulse, and setting an end point of the detection gate to adopt the bottom wave position of a ④ -number circular flat-bottom groove or the position 1-2 mm before the bottom wave, so that the defects of cracks, holes, corrosion, eccentric wear and the like to be detected can be effectively and quantitatively detected and evaluated.
The above description is only for the preferred embodiment of the present invention, and the technical solution of the present invention is not limited thereto, and any known modifications made by those skilled in the art on the basis of the main technical idea of the present invention belong to the technical scope to be protected by the present invention.
Claims (6)
1. The utility model provides a contrast test block for being in service oil pipe electromagnetic acoustic automated inspection which characterized in that: comprises a pipe body and artificial defects arranged on the pipe body;
the artificial defects include three categories, which are respectively:
a. the device is used for simulating the eccentric wear/crack defect in the in-service oil pipe, wherein the eccentric wear/crack defect is formed by a plurality of annular flat-bottom notch grooves arranged on the inner surface of a pipe body, and the annular flat-bottom notch grooves are sequentially arranged along the axial direction of the pipe body;
b. the device is used for simulating a common metal loss defect in an in-service oil pipe, wherein the common metal loss defect is a square flat-bottom notch groove arranged on the inner surface of a pipe body;
c. a a plurality of flat punch combination that is arranged in simulating hole form metal loss defect in labour oil pipe, hole form metal loss defect is for setting up at the body internal surface, a plurality of flat punch combination set gradually along the body axial, and every flat punch combination includes along the radial a plurality of flat holes of seting up of the same circumferencial direction of body.
2. The reference block for electromagnetic ultrasonic automatic detection of in-service oil pipes according to claim 1, characterized in that: the number of the circular ring-shaped flat-bottom notches is 4, the widths of the 4 circular ring-shaped flat-bottom notches are 2mm, and the depths of the notches are respectively 20%, 40%, 60% and 80% of the wall thickness of the tube body in sequence.
3. The reference block for electromagnetic ultrasonic automatic detection of in-service oil pipes according to claim 2, characterized in that: the side length of the square flat bottom notch groove is 30mm, and the groove depth is 20% of the wall thickness of the pipe body.
4. The reference block for electromagnetic ultrasonic automatic detection of in-service oil pipes according to claim 3, characterized in that: the number of the flat bottom hole groups is 3, and each flat bottom hole group comprises 4 flat bottom holes;
the hole depths of the 3 flat-bottom hole groups are respectively 20%, 35% and 50% of the wall thickness of the tube body in sequence;
the hole diameter of all the flat bottom holes is 10 mm.
5. The reference block for electromagnetic ultrasonic automatic detection of in-service oil pipes according to claim 4, characterized in that: the distance between two adjacent flat bottom hole groups is larger than the width of the electromagnetic ultrasonic detection probe; the distance between two adjacent flat bottom holes in each flat bottom hole group is larger than the length of the electromagnetic ultrasonic detection probe.
6. The reference block for electromagnetic ultrasonic automatic detection of in-service oil pipes according to claim 5, characterized in that: the axial distance between the adjacent circular flat bottom notches is larger than the width of the electromagnetic ultrasonic detection probe.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110763760A (en) * | 2019-10-21 | 2020-02-07 | 中国石油天然气集团公司管材研究所 | Reference block for electromagnetic ultrasonic automatic detection of in-service oil pipe and design method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110763760A (en) * | 2019-10-21 | 2020-02-07 | 中国石油天然气集团公司管材研究所 | Reference block for electromagnetic ultrasonic automatic detection of in-service oil pipe and design method |
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Effective date of registration: 20230621 Address after: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: China Petroleum Engineering Materials Research Institute Co.,Ltd. Patentee after: BEIJING LONGSHINE OIL TUBULAR TECHNOLOGY Co.,Ltd. Address before: 710065, No. two, No. 32, Xi'an, Shaanxi Patentee before: CNPC TUBULAR GOODS Research Institute Patentee before: BEIJING LONGSHINE OIL TUBULAR TECHNOLOGY Co.,Ltd. |