CN107515245A - Oil gas storage well sleeve leakage field test device and method of testing - Google Patents
Oil gas storage well sleeve leakage field test device and method of testing Download PDFInfo
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- CN107515245A CN107515245A CN201710785964.5A CN201710785964A CN107515245A CN 107515245 A CN107515245 A CN 107515245A CN 201710785964 A CN201710785964 A CN 201710785964A CN 107515245 A CN107515245 A CN 107515245A
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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
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/85—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields using magnetographic methods
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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
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
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Abstract
The present invention relates to oil gas storage well sleeve leakage field test device and method of testing, including ground PC, centralizer and downhole instrument, ground PC is connected by cable with downhole instrument, downhole instrument connects with centralizer, is moved up and down by downhole instrument deadweight and cable tension centralizer and downhole instrument in sleeve pipe；The signal gathering unit of downhole instrument includes cross magnetization device, horizontal detection unit, wall thickness detection unit, longitudinal magnetization device and the longitudinal detection unit being sequentially connected；Horizontal detection unit includes at least one transversal sonde, and wall thickness detection unit includes 4*4 Hall elements；Longitudinal detection unit includes the vertical sonde of multiple circumference uniform distributions, and vertical sonde includes longitudinal magnet and the multigroup coil being wound on longitudinal magnet.It is bigger that the present invention solves the problems, such as that gas storage well sleeve damage detecting method is influenceed by subsurface environment, and the present invention can detect damage status inside and outside sleeve pipe simultaneously using magnetic leakage detection technology, and not influenceed by downhole fluid environment.
Description
Technical field
Gas storage well bore wall thickness and corrosion detection system are specific to the relevant facilities such as gas station, peak regulation station with method to be made
All kinds gas storage well, wall thickness measuring and extent of corrosion detection are carried out, to assess the non-destructive detecting device of its safe condition
And technological means.
Background technology
Natural gas is a kind of environmental clean high-grade energy, hardly sulfur-bearing, dust and other harmful substances, is produced during burning
Raw carbon dioxide is less than other fossil fuels, causes greenhouse effects relatively low, thus can fundamentally improve environmental quality.Due to day
Right gas is green, it is economical and practical more and more pursued, increasingly increased with the utilization rate of natural gas, so in recent years complete
There are many natural gas filling stations and gas distributing system in each big city of state, and gas storage well is natural gas filling station or gas distributing system
In be used to store the vertical of compressed natural gas.The buried underground of gas storage well and take up an area it is small, be very suitable for the storage of natural gas.So
And after use after a while, gas storage well often receive gas in well, in greasy dirt and near-borehole formation medium corrosion, make
Pit shaft produces corrosion and wall thickness is thinning, so that the bearing capacity of gas storage well reduces, so that can not ensure safety, may finally send out
Raw fracture is that well body goes out ground, potential safety hazard be present.
The casing damage detection method of gas storage well has following several：
1st, impression method：This method technological principle is simple, is widely applied in underground work.Problem be present has：1) need
Lower tubular column；2) simple analysis can only be done to known set damage position, there is certain limitation.
2nd, hole diameter method：By measuring casing inner diameter change detection casing deformation, not by wellbore casing residual magnetization, magnetic conduction energy
The influence of power, it can accurately measure the change of full well set variation portion and hole diameter.Problem be present has：1) it is only applicable to stratum
Shake out few, the thin cased well of pit shaft fouling；2) corrosion of sleeve outer wall and the change of thickness can not be judged.
3rd, sonic test：Internal corrosion, deformation and the bad break of sleeve pipe are detected using the principle of reflection of ultrasonic wave, there is provided audio-visual picture
Picture.The problem of existing has：1) can not be logged well in air well or gas cut well；2) mud viscosity is unsuitable excessive, otherwise probe without
Method rotates；3) in high angle hole, it is necessary to keep good measurement placed in the middle；4) influenceed by fouling, wax deposition etc. on the borehole wall big.
4th, optical imagery：Imaged using downhole imaging head in well, test signal is sent to ground direct imaging and judges damage
Wound.The problem of existing has：1) change and the judgement of trouble of lost tool in hole in detection sleeve pipe are only applicable；2) by the visibility of well liquid limited compared with
Greatly.
The content of the invention
Influenceed to solve existing gas storage well sleeve damage detecting method by subsurface environment bigger, detection is incomplete
Technical problem, the present invention provide a kind of oil gas storage well sleeve leakage field test device and method of testing, utilize magnetic leakage detection technology
Damage status inside and outside sleeve pipe can be detected simultaneously, and is not influenceed by downhole fluid environment, and the invention belongs to contactless survey
Amount, the diagnosis of set damage and generaI investigation during suitable for workover treatment.
The technical solution of the present invention：
Oil gas storage well sleeve leakage field test device, it is characterized in that：Including ground PC, centralizer and underground
Instrument, the ground PC are connected by cable with downhole instrument, and the downhole instrument connects with centralizer, passes through downhole instrument
Deadweight and cable tension drive centralizer and downhole instrument to be moved up and down in sleeve pipe；
The downhole instrument includes electrical appliance kit, signal gathering unit and signal processing unit；
It is cross magnetization device that the signal gathering unit includes being sequentially connected, horizontal detection unit, wall thickness detection unit, vertical
To magnetizer and longitudinal detection unit；The horizontal detection unit includes at least one transversal sonde, and each transversal sonde is equal
Including transverse magnet and the multigroup coil being wound on magnet；The wall thickness detection unit includes 4*4 Hall elements；The longitudinal direction inspection
Surveying unit includes the vertical sonde of multiple circumference uniform distributions, and the vertical sonde includes longitudinal magnet and is wound on longitudinal magnet
Multigroup coil；The cross magnetization device, longitudinal magnetization device are used to set tube wall being magnetized to saturation state；
The signal processing unit includes signal conversion unit, signal transmitting unit, signal receiving unit, advanced treating and shown
Show unit, data and depth synthesis unit, the analog signal that the signal conversion unit is used to send signal gathering unit turns
Data signal is changed to, and signal receiving unit is sent to by signal transmitting unit；The data that signal receiving unit will receive
Data depth synthesis unit is sent to, the advanced treating display unit is used for where the signal gathering unit of collection display in real time
Depth coordinate；Data and the depth synthesis unit is used to data synthesis corresponding with depth coordinate detecting data, by testing number
Judged according to ground PC is sent to by cable.
Further, the horizontal detection unit includes four groups of transversal sondes circumferentially arranged successively, and every group is laterally visited
40 transverse coils are wound with the transverse magnet of head.
Further, longitudinal detection unit includes the vertical sonde of 80 circumference uniform distributions.
The method of testing of oil gas storage well sleeve leakage field test device, comprises the following steps：
1) damage and test response relation are determined：
1.1) sample pipe is made：The sample pipe includes at least five kinds of defects, and respectively A classes defect is round bottom hole or oval bottom outlet；B
Class defect is to be made up of multiple adjacent identical round bottom holes or oval bottom outlet；C classes defect is flat-bottom hole；D classes defect is flat grooving,
E classes defect is unilateral defect, and milling is into flat；
1.2) connecting test device, setup test；
1.3) each detection unit does straight ahead, treats that test sample pipe remains stationary as, and detection unit is close to the advance of sample pipe, obtains
Test result；
1.4) the defects of sample pipe and test result opening relationships are formed standard curve by ground PC；
2) actual test：
2.1) test device is transferred to sleeve pipe to be measured so that each detection unit does straight ahead, sleeve pipe to be measured
Remain stationary as, each detection unit is close to sleeve pipe advance；
2.2) analog electrical signal of output is sent letter by horizontal detection unit, wall thickness detection unit and longitudinal detection unit
Number converting unit, after analog current signal is converted to data signal by signal conversion unit, by signal transmitting unit by numeral
Signal is sent to signal receiving unit, and data signal is sent to data and depth synthesis unit by signal receiving unit, while deep
Depth data is sent to data and depth synthesis unit by degree processing display unit；Data and depth synthesis unit are by data and depth
Degree coordinate pair should synthesize detection data, and send ground PC by data-interface；
2.3) ground PC obtains the damage position and type of sleeve pipe according to standard curve.
Beneficial effect possessed by the present invention：
1st, oil gas storage well sleeve leakage field test device of the invention detects gas storage sleeve pipe simultaneously using magnetic leakage detection technology
Inside and outside damage status, and do not influenceed by downhole fluid environment, belong to non-contact measurement, measurement accuracy is high, and performance is steady
It is fixed.
2nd, oil gas storage well sleeve leakage field test device of the invention, a survey sleeve pipe, tri- groups of probes of X, Y, Z may detect
Sleeve pipe, contained much information than only having one group of probe to detect the existing instrument of sleeve pipe, accuracy is high.
Brief description of the drawings
Fig. 1 is the outline structural diagram of oil gas storage well sleeve leakage field test device of the present invention；
Fig. 2 is oil gas storage well sleeve leakage field test device test philosophy schematic diagram of the present invention；
Fig. 3 is the structural representation of transversal sonde；
Fig. 4 is the structural representation of vertical sonde；
Fig. 5 is the theory diagram of the present invention；
Wherein accompanying drawing mark is labeled as：1- stratum, 2- casing couplings, 3- pit shafts, 4- sleeve pipes, 5- casing imperfections, 14- are laterally examined
Survey unit, 141- transverse magnets, 142- horizontal line coils, 16- longitudinal directions detection unit, 161- longitudinal directions magnet, 162- longitudinal coils, 8-
Cement sheath, 9- transverse cracks, 10- longitudinal cracks, 12- centralizers, 11- electrical appliance kits, 13- cross magnetization devices, 15- longitudinal magnetizations
Device.
Embodiment
Embodiment 1：As shown in Fig. 1, Fig. 3, Fig. 4, Fig. 5, oil gas storage well sleeve leakage field test device, including ground PC
Machine, centralizer 12 and downhole instrument, ground PC are connected by cable with downhole instrument, and downhole instrument connects with centralizer,
Centralizer and downhole instrument is driven to be moved up and down in sleeve pipe by downhole instrument deadweight and cable tension；Downhole instrument includes electricity
Device box, signal gathering unit and signal processing unit；
Signal gathering unit includes cross magnetization device, horizontal detection unit, wall thickness detection unit, the longitudinal flux being sequentially connected
Change device and longitudinal detection unit；Horizontal detection unit includes at least one transversal sonde, and every group of transversal sonde has multiple detections
Coil；Wall thickness detection unit includes the Hall element 16 around sleeve pipe circumference uniform distribution；It is equal that longitudinal detection unit includes multiple circumference
The vertical sonde of cloth, vertical sonde include longitudinal magnet and the multigroup longitudinal coil being wound on longitudinal magnet；Cross magnetization device,
Longitudinal magnetization device is used to set tube wall being magnetized to saturation state；
Signal processing unit includes signal conversion unit, signal transmitting unit, signal receiving unit, advanced treating display list
Member, data and depth synthesis unit, signal conversion unit are used to the analog signal that signal gathering unit is sent being converted to numeral
Signal, and signal receiving unit is sent to by signal transmitting unit；The data received are sent to number by signal receiving unit
It is used to gather the depth coordinate shown where signal gathering unit in real time according to depth synthesis unit, advanced treating display unit；
Data and depth synthesis unit are used to, by data synthesis detection data corresponding with depth coordinate, detection data are passed through into cable, number
Ground PC is sent to according to interface to be judged.
Embodiment 2：Preferably：Horizontal detection unit includes four groups of transversal sondes around the arrangement of sleeve pipe circumference, each horizontal
40 groups of coils are wound with magnet.
Embodiment 3：Preferably：Longitudinal detection unit includes the vertical sonde of 80 circumference uniform distributions.
Embodiment 4：Such as principle schematic of Fig. 2 test devices in actual test, the lower section of sleeve pipe 4 below 1, covers on stratum
Sleeve pipe is formed between pipe and sleeve pipe and connects 2 hoops, test device is transferred to the pit shaft 3 of sleeve pipe 4, in actually detected method, probe
Scanning be all to do axial scan around steel pipe.
Embodiment 5：
The method of testing of oil gas storage well sleeve leakage field test device, comprises the following steps：
1) damage and test response relation are determined：
1.1) sample pipe is made：The sample pipe includes at least five kinds of defects, and respectively A classes defect is round bottom hole or oval bottom outlet；B
Class defect is to be made up of multiple adjacent identical round bottom holes or oval bottom outlet；C classes defect is flat-bottom hole；D classes defect is flat grooving,
E classes defect is unilateral defect, and milling is into flat；
1.2) connecting test device, setup test；
1.3) each detection unit does straight ahead, treats that test sample pipe remains stationary as, and detection unit is close to before sample pipe does straight line
Enter, obtain test result；
1.4) the defects of sample pipe and test result opening relationships are formed standard curve by ground PC；
2) actual test：
2.1) test device is transferred to sleeve pipe to be measured so that each detection unit axially moves, sleeve pipe to be measured
Remain stationary as, detection unit is close to sleeve pipe and does axial advancement；
2.2) analog electrical signal of output is sent letter by horizontal detection unit, wall thickness detection unit and longitudinal detection unit
Number converting unit, after analog current signal is converted to data signal by signal conversion unit, by signal transmitting unit by numeral
Signal is sent to signal receiving unit, and data signal is sent to data and depth synthesis unit by signal receiving unit, while deep
Depth data is sent to data and depth synthesis unit by degree processing display unit；Data and depth synthesis unit are by data and depth
Degree coordinate pair should synthesize detection data, and send ground PC by data-interface；
2.3) ground PC obtains the damage position and type of sleeve pipe according to standard curve.
Claims (4)
1. oil gas storage well sleeve leakage field test device, it is characterised in that：Including ground PC, centralizer and downhole instrument,
The ground PC is connected by cable with downhole instrument, and the downhole instrument connects with centralizer, and righting is pulled by cable
Device and downhole instrument move up and down in sleeve pipe；
The downhole instrument includes electrical appliance kit, signal gathering unit and signal processing unit；
The signal gathering unit includes cross magnetization device, horizontal detection unit, wall thickness detection unit, the longitudinal flux being sequentially connected
Change device and longitudinal detection unit；The horizontal detection unit includes at least one transversal sonde, and each transversal sonde includes
Transverse magnet and the multigroup transverse coil being wound on transverse magnet；The wall thickness detection unit includes 4*4 Hall elements；It is described vertical
Include the vertical sonde of multiple circumference uniform distributions to detection unit, the vertical sonde includes longitudinal magnet and is wound on longitudinal magnet
On multigroup longitudinal coil；The cross magnetization device, longitudinal magnetization device are used to set tube wall being magnetized to saturation state；
The signal processing unit includes signal conversion unit, signal transmitting unit, signal receiving unit, advanced treating display list
Member, data and depth synthesis unit, the analog current signal that the signal conversion unit is used to send signal gathering unit turn
Data signal is changed to, and signal receiving unit is sent to by signal transmitting unit；The data that signal receiving unit will receive
Data and depth synthesis unit are sent to, the advanced treating display unit, which is used to gather in real time, shows signal gathering unit place
Depth coordinate；Data and the depth synthesis unit is used to, by data synthesis detection data corresponding with depth coordinate, to detect
Data are sent to ground PC by cable and judged.
2. oil gas storage well sleeve leakage field test device according to claim 1, it is characterised in that：The laterally detection is single
Member includes four groups of transversal sondes circumferentially arranged successively, and 40 x wires are wound with the transverse magnet of every group of transversal sonde
Circle.
3. oil gas storage well sleeve leakage field test device according to claim 1 or 2, it is characterised in that：The longitudinal direction inspection
Surveying unit includes the vertical sonde of 80 circumference uniform distributions.
4. the method for testing of any described oil gas storage well sleeve leakage field test device using claim 1-3, its feature
It is, comprises the following steps：
1) damage and test response relation are determined：
1.1) sample pipe is made：The sample pipe includes at least five kinds of defects, and respectively A classes defect is round bottom hole or oval bottom outlet；B classes lack
Fall into be made up of multiple adjacent identical round bottom holes or oval bottom outlet；C classes defect is flat-bottom hole；D classes defect is flat grooving, E classes
Defect is unilateral defect, and milling is into flat；
1.2) connecting test device, setup test；
1.3) each detection unit does straight ahead, treats that test sample pipe remains stationary as, and detection unit is close to the advance of sample pipe, is tested
As a result；
1.4) the defects of sample pipe and test result opening relationships are formed standard curve by ground PC；
2) actual test：
2.1) test device is transferred to sleeve pipe to be measured so that each detection unit does straight ahead, and sleeve pipe to be measured is kept
Motionless, each detection unit is close to sleeve pipe advance；
2.2) analog electrical signal of output is sent signal and turned by horizontal detection unit, wall thickness detection unit and longitudinal detection unit
Unit is changed, after analog current signal is converted to data signal by signal conversion unit, by signal transmitting unit by data signal
Signal receiving unit is sent to, data signal is sent to data and depth synthesis unit, while depth by signal receiving unit
Depth data is sent to data and depth synthesis unit by reason display unit；Data and depth synthesis unit sit data and depth
The corresponding synthesis detection data of mark, and ground PC is sent by data-interface；
2.3) ground PC obtains the damage position and type of sleeve pipe according to standard curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710785964.5A CN107515245A (en) | 2017-09-04 | 2017-09-04 | Oil gas storage well sleeve leakage field test device and method of testing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710785964.5A CN107515245A (en) | 2017-09-04 | 2017-09-04 | Oil gas storage well sleeve leakage field test device and method of testing |
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| CN107515245A true CN107515245A (en) | 2017-12-26 |
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| CN201710785964.5A Pending CN107515245A (en) | 2017-09-04 | 2017-09-04 | Oil gas storage well sleeve leakage field test device and method of testing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110596192A (en) * | 2019-09-22 | 2019-12-20 | 安徽上造智能设备科技有限公司 | Cable aging infrared detection device and use method thereof |
| CN112362316A (en) * | 2019-07-23 | 2021-02-12 | 中国石油天然气股份有限公司 | Rigid casing centralizer trafficability detection device and detection method |
| CN114354859A (en) * | 2022-01-18 | 2022-04-15 | 中国石油大学(华东) | Device and method for testing anti-waxing performance of material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362316A (en) * | 2019-07-23 | 2021-02-12 | 中国石油天然气股份有限公司 | Rigid casing centralizer trafficability detection device and detection method |
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| CN114354859A (en) * | 2022-01-18 | 2022-04-15 | 中国石油大学(华东) | Device and method for testing anti-waxing performance of material |
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Application publication date: 20171226 |