CN108051499B - Workover oil pipe on-line measuring device - Google Patents
Workover oil pipe on-line measuring device Download PDFInfo
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- CN108051499B CN108051499B CN201711320801.6A CN201711320801A CN108051499B CN 108051499 B CN108051499 B CN 108051499B CN 201711320801 A CN201711320801 A CN 201711320801A CN 108051499 B CN108051499 B CN 108051499B
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- detection
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- encoder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
Abstract
The invention relates to an on-line detection device for an oil pipe in workover treatment, which consists of a shell, a core body, a cable, a signal processor, a coder, an explosion-proof box, a pressing plate and an end cover. The core body is composed of three groups of detection inner cores which form an angle of 120 degrees with each other and is arranged in the shell. The detection inner core comprises a detection assembly, a spring, a supporting component and a touch panel, wherein the detection assembly comprises an excitation coil and a detection coil and is fixed on the touch panel. The signal processor is connected with the detection assembly through a cable and used for processing output signals of the detection coil, analyzing damage conditions of the oil outlet pipe and coupling signals, storing data and uploading the data to an upper computer. The encoder is connected with the signal processor and installed in the explosion-proof box, the signal processor controls the encoder to count when sending out a coupling signal, and the counting result is uploaded in a recording mode and used for metering the length of the oil pipe. The device can improve the precision of oil pipe detection, and the integration of oil pipe length and flaw detection is realized.
Description
Technical Field
The invention relates to the technical field of oil field well repair, in particular to an oil pipe online detection device used in a well repair process.
Technical Field
The current workover equipment is the key equipment for downhole operation, and directly influences the speed and quality of the workover operation. Most of the oil field development in China enters the period of 'three highs', and the underground operation becomes an important measure for the stable production of the oil field. Therefore, the well repair equipment with advanced technology, safety and reliability has very important significance for implementing the low-cost strategy. However, the detection of the integrity of the oil pipe in the well repairing operation is the key to realizing the strategy. Due to stratum, human factors and other reasons, the oil pipe can be damaged in different degrees and the length of the oil pipe can be evaluated inaccurately, so that serious accidents such as well leakage and the like can be caused, and the safety of personnel is seriously threatened. Therefore, it is necessary to know the specific data of the oil pipe.
At present, the length detection of an oil pipe mainly has two modes: one way is by manual tape measure measurement, however, this way is prone to operator error causing inaccuracy to the oil pipe length measurement, which may lead to safety accidents when used again; the other mode is that the length of the displacement of the steel wire rope in the lifting process is measured, and the steel wire rope deforms under stress in the lifting process of the oil pipe, so that the length of the oil pipe cannot be accurately reflected; meanwhile, the existing method for measuring the loss condition of the oil pipe mainly adopts ultrasonic flaw detection and electromagnetic flaw detection, and the ultrasonic flaw detection and the electromagnetic flaw detection need to additionally detect the oil pipe one by one, so that the time is consumed, and the cost of well repair is increased.
Most coils of the existing electromagnetic detection device are fixed in position, but the diameter of an oil pipe can change along with the change of the position of the coil, the diameter of an oil pipe joint is larger, and the diameter of the middle part of the oil pipe is smaller. When the detection device for fixing the coil is lifted up on the oil pipe, when the oil pipe joint passes through the detection device, the distance between the outer wall of the oil pipe and the coil is small, and when the middle part of the oil pipe passes through the detection device, the distance between the outer wall of the oil pipe and the coil is large, so that the detection precision is low.
Therefore, how to efficiently, accurately and safely detect the specific data of the oil pipe is a technical problem which needs to be solved urgently by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide an on-line detection device for an oil pipe in workover operation, which is used for improving the accuracy of oil pipe length detection and quickly acquiring oil pipe damage data.
In order to solve the technical problem, the on-line detection device for the workover oil pipe provided by the invention comprises a shell, a core body, a cable, a signal processor, a coder, an explosion-proof box, a pressure plate and an end cover; the core body comprises three groups of detection inner cores which form an angle of 120 degrees with each other, and each detection inner core comprises a detection assembly, a spring, a supporting component and a touch panel and is arranged in the shell. The spring is arranged between the touch plate and the supporting part, the touch plate adopts a pressure plate and an end cover to limit axial movement, the detection assembly comprises an excitation coil and a detection coil, the excitation coil adopts pulse excitation, the coil is in a horseshoe shape and is fixed on the touch plate, and the distance between the detection assembly and the outer wall of the oil pipe is kept unchanged along with the radial movement of the touch plate along the oil pipe; the signal processor is connected with the detection assembly through a cable and used for processing output signals of the detection coil, analyzing damage conditions of the oil outlet pipe and coupling signals, storing data and uploading the data to an upper computer; the encoder is connected with the signal processor and installed in the explosion-proof box, and the signal processor controls the encoder to count when sending out a coupling signal, and the encoder counts the number and finishes the counting, and records and uploads the counting result for the measurement of the length of the oil pipe.
Compared with the prior art, the invention has the following advantages:
1. the flaw detection and length detection processes of the oil pipe are completed in the lifting process after the well repair is completed, and extra working hours are not required.
2. By adopting the pulse eddy current technology, more oil pipe information can be acquired than that of the traditional eddy current flaw detection technology.
3. The counting between the two tubing couplings is used as the length of the tubing, so that the accuracy of tubing length detection is effectively improved.
4. The detection assembly is formed by a horseshoe-shaped coil with an angle of 120 degrees and is fixed on the touch plate, the coil moves along the radial direction of the oil pipe along with the touch plate, the distance between the coil and the outer wall of the oil pipe can be kept unchanged all the time, and the detection precision is improved.
Drawings
FIG. 1 is a schematic diagram of the general structure of an on-line detection device for a workover oil pipe.
Fig. 2 is a schematic axial view of the core.
FIG. 3 is a schematic top view of the de-capping device.
Fig. 4 is a schematic view of the structure of the detection inner core.
The anti-explosion device comprises a shell, a core body, a cable, a signal processor, an encoder, an anti-explosion box, a pressure plate, an end cover, an oil pipe, a detection inner core, a detection assembly, a spring, a supporting component 203, a contact plate 204, a spring, an oil pipe 9, an oil pipe 20, a detection inner core 201, a detection assembly 202 and a contact plate 204.
Detailed Description
The core of the invention is to provide an oil pipe online detection device for workover treatment, so as to improve the accuracy of oil pipe detection, and the integration of oil pipe length and flaw detection is realized, thereby facilitating the efficient workover treatment.
The present invention will be better understood by those skilled in the art from the following detailed description of the invention, taken in conjunction with the accompanying drawings and specific embodiments.
As shown in fig. 1, 2, 3 and 4, the on-line detection device for the workover oil pipe comprises a shell 1, a core 2, a cable 3, a signal processor 4, an encoder 5, an explosion-proof box 6, a pressure plate 7 and an end cover 8. The core body 2 is composed of three groups of detection inner cores 20 forming an angle of 120 degrees with each other and is arranged in the shell body 1. The signal processor 4 is connected with the detection inner core 20 through the cable 3, the detection inner core 20 is composed of a detection assembly 201, a spring 202, a supporting component 203 and a touch plate 204, the detection assembly 201 comprises an excitation coil and a detection coil, and the coil is of a horseshoe-shaped structure. The signal processor 4 is connected with the detection inner core 20, specifically, the detection coil in the detection assembly 201, and the signal processor 4 is used for processing and analyzing the output signal of the detection coil in the detection assembly 201, storing the processed and analyzed data and sending the data to an upper computer for management, further analyzing and processing to form an evaluation scheme for the damage condition of the oil pipe 9, and only when a coupling signal appears, the signal processor sends out the coupling signal and enables the encoder 5 to count, and the length of the oil pipe is represented by the count of the encoder 5. The spring 202 is mounted between the support member 203 and the contact plate 204. The detection assembly 201 is fixed on the touch plate 204, and the spring 202 stretches and retracts to enable the touch plate 204 to move radially to keep the distance between the detection assembly 201 and the outer wall of the oil pipe 9 unchanged, so that the detection precision is improved.
The principle is described by taking the length of the oil pipe 9 and flaw detection as an example, rectangular pulse excitation with the frequency of 10HZ and the duty ratio of 50% is applied to the excitation coil in the detection assembly 201, according to the law of electromagnetic induction, when the oil pipe 9 passes through, an eddy current is generated in the oil pipe wall of the oil pipe 9, so that the detection coil generates induced electromotive force, and because the corresponding impedance changes when oil pipes 9 and oil pipe 9 couplings with different damage conditions pass through, the magnetic induction intensity also changes, and the impedances of the oil pipes 9 and the oil pipe 9 couplings with different damage conditions are different, so that the influence on the magnetic induction intensity is different, and the induced electromotive force generated in the detection coil is different.
The wall thickness of the damaged oil pipe 9 and the wall thickness of the coupling are obviously different, so that the impedance between the damaged oil pipe 9 and the coupling is obviously different, the induced electromotive force detected by the detection coil is obviously different, and the damage signal and the coupling signal of the oil pipe 9 can be conveniently distinguished. After the signal processor 4 processes and analyzes the induced electromotive force generated in the detection coil, the damage signal and the coupling signal of the oil pipe 9 can be easily distinguished, so that the data of the corresponding loss condition of the oil pipe 9 is stored and uploaded to an upper computer, after the electromotive force change corresponding to the coupling is detected, the signal processor 4 sends the coupling signal and enables the encoder 5 to start counting, when the coupling signal is detected again, the encoder 5 finishes counting and stores the uploaded counting result and then reinitializes to start counting, the counting between the two coupling signals is used for representing the length of the oil pipe, and the precision of the length measurement of the oil pipe 9 is improved.
As the diameter of the oil pipe 9 changes with the position, the diameter of the coupling part of the oil pipe 9 is larger, and the diameter of the middle part of the oil pipe 9 is smaller, the detection assembly 201 is fixed on the touch plate 204, when the diameter of the oil pipe 9 changes, the touch plate 204 can move, the coil also moves along the radial direction of the oil pipe 9, the spring 202 is always in a compression state in the working process, so that the touch plate 204 and the oil pipe 9 can be always in contact, the distance between the detection assembly 201 and the outer wall of the oil pipe 9 is always kept unchanged, the detection precision is improved, and the port of the touch plate 204 adopts a horn type structure, so that the harmless oil pipe can pass through. In the embodiment of the invention, the signal processor 4 and the encoder 5 are arranged in the explosion-proof box 6 so as to meet the requirement of explosion-proof grade in oilfield operation. When the device is used, the device is fixedly arranged above the blowout preventer. Because the device does not have the blowout prevention function, the device is required to be matched with a blowout preventer for use.
The on-line detection device for the workover oil pipe provided by the invention is described in detail above. The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to assist in understanding the present invention and its core concepts. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of the claims of the present invention.
Claims (2)
1. An on-line detection device for an oil pipe in workover operation comprises a shell (1), a core body (2), a cable (3), a signal processor (4), a coder (5), an explosion-proof box (6), a pressure plate (7) and an end cover (8); the method is characterized in that:
the core body (2) consists of three groups of detection inner cores (20) which form an angle of 120 degrees with each other and is arranged in the shell (1);
the signal processor (4) is connected with the detection inner core (20) through a cable (3) and is used for processing an output signal of the detection inner core (20), analyzing the damage condition of the oil outlet pipe (9) and a coupling signal, storing data and uploading the data to an upper computer;
the encoder (5) is connected with the signal processor (4) and is arranged in the explosion-proof box (6), and the signal processor (4) controls the encoder (5) to start counting and end counting when sending out coupling signals, and records and uploads counting results for metering the length of the oil pipe (9);
the detection inner core (20) comprises a detection assembly (201), a spring (202), a supporting component (203) and a touch pad (204); the detection assembly (201) is fixed on the touch pad (204), the spring (202) is installed between the supporting component (203) and the touch pad (204), the radial movement of the touch pad (204) along the oil pipe (9) is realized through the extension and contraction of the spring (202), so that the distance between the detection assembly (201) and the oil pipe (9) is always kept at a certain specific value, the diameter change along with the oil pipe (9) is avoided, the detection precision is improved, and the touch pad (204) limits the axial movement by adopting the pressing plate (7) and the end cover (8).
2. An on-line detection device for workover tubing according to claim 1, wherein the detection assembly (201) comprises an excitation coil and a detection coil, the excitation coil adopts pulse type excitation, and the coil structure is horseshoe-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711320801.6A CN108051499B (en) | 2017-12-12 | 2017-12-12 | Workover oil pipe on-line measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711320801.6A CN108051499B (en) | 2017-12-12 | 2017-12-12 | Workover oil pipe on-line measuring device |
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| Publication Number | Publication Date |
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| CN108051499A CN108051499A (en) | 2018-05-18 |
| CN108051499B true CN108051499B (en) | 2020-05-08 |
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| CN201711320801.6A Active CN108051499B (en) | 2017-12-12 | 2017-12-12 | Workover oil pipe on-line measuring device |
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| CN113153276B (en) | 2021-05-20 | 2023-11-21 | 烟台杰瑞石油装备技术有限公司 | Ferromagnetic object detection device and method for detecting tubing coupling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2008142386A (en) * | 2006-03-27 | 2010-05-10 | Ки Энерджи Сервисиз, Инк. (Us) | METHOD AND SYSTEM FOR ASSESSING AND DISPLAYING DEPTH DATA |
| CN201953376U (en) * | 2011-01-30 | 2011-08-31 | 沈阳新松机器人自动化股份有限公司 | Tubing coupling detecting device |
| CN102621218A (en) * | 2012-03-15 | 2012-08-01 | 西南石油大学 | Device and method for measuring detector measuring range in defect magnetic leakage of oil-gas pipeline |
| CN202560210U (en) * | 2012-03-22 | 2012-11-28 | 荆州市明德科技有限公司 | Tubing coupling online detecting instrument |
| CN104564033B (en) * | 2015-02-13 | 2017-10-27 | 烟台杰瑞石油装备技术有限公司 | A kind of pipeline coupling detection means |
| CN105352686A (en) * | 2015-12-17 | 2016-02-24 | 天朗科技有限公司 | Detection device used for detecting air tightness of container online |
| CN105487545A (en) * | 2016-01-28 | 2016-04-13 | 天津理工大学 | Worm wheel type driving pipeline robot system based on high-strength spring wall press apparatus |
| CN205781424U (en) * | 2016-06-17 | 2016-12-07 | 北京石油化工学院 | A kind of convenient diameter-variable pipe tuned mass damper structure |
| CN206420422U (en) * | 2016-12-29 | 2017-08-18 | 烟台杰瑞石油装备技术有限公司 | A kind of tubing depth measurement apparatus |
| CN107882550B (en) * | 2017-11-15 | 2021-06-11 | 烟台杰瑞石油装备技术有限公司 | Airtight well head coupling detection device |
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