CN114198085A - Probe type casing loss detection device and method - Google Patents
Probe type casing loss detection device and method Download PDFInfo
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- CN114198085A CN114198085A CN202111386331.XA CN202111386331A CN114198085A CN 114198085 A CN114198085 A CN 114198085A CN 202111386331 A CN202111386331 A CN 202111386331A CN 114198085 A CN114198085 A CN 114198085A
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- 238000001514 detection method Methods 0.000 title claims abstract description 153
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- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 6
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- 239000003208 petroleum Substances 0.000 abstract description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
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- 238000004519 manufacturing process Methods 0.000 description 3
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- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
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Abstract
The invention discloses a probe type casing loss detection device and a method, relating to the technical field of petroleum logging; the device comprises electric control centralizers which are positioned on the upper side and the lower side of the detection pipe body, wherein a plurality of layers of detection rings are arranged between the electric control centralizers, and the detection rings are all arranged on the detection pipe body. The detection ring is three layers, each detection ring comprises 4 detection machines which are arranged in an equal division mode, and the detection machines are connected with the detection ring motor. The detector comprises a detection needle which is arranged in the radial direction, the rear end of the detection needle is connected with a reed of the armature, a permanent magnet is arranged on one side of the reed of the armature, and an iron core and a coil assembly which have opposite magnetic fields to the permanent magnet after being electrified are arranged on the inner side of the permanent magnet. The detection ring of the probe needle is matched with the electric control centralizer for assistance, and the problem of the current casing pipe is judged according to the extending length of the probe needle, so that the casing damage detection is more visual. The structure is novel, and the detection accuracy is high.
Description
Technical Field
The invention relates to the technical field of petroleum logging, in particular to a probe type casing damage detection device and a probe type casing damage detection method.
Background
The oil-water well is a basic unit for oil field production, a sleeve for connecting a reservoir and an oil pipe for collecting crude oil are arranged in the oil-water well, a Christmas tree connected with the oil pipe is arranged above the oil-water well, and the Christmas tree is connected with an external oil collecting station so as to collect and store the crude oil in the oil-water well in the oil collecting station. In the production of the oil-water well, if the casing pipe is damaged, the quality of the collected crude oil is directly influenced, so that the state of the casing pipe in the oil-water well needs to be detected at an irregular period, the influence of casing damage on the normal production of the oil-water well is prevented, and the quality of the collected crude oil is ensured.
Due to the influence of various factors such as engineering factors, geological factors and the like during the operation of the casing, the defects such as cracks, holes, deformation, diameter reduction and the like are easy to occur, so that the water injection effect of the oil-water well is influenced, the yield is reduced, and the service life of an oil well is shortened. Casing damage detection measures the diameter, wall thickness, deformation, holes and the like of a casing by a certain technical means, and currently common casing damage detection technologies comprise an ultrasonic detection technology, a mechanical borehole diameter detection technology, an electromagnetic detection technology, a radioactive isotope detection technology and the like. At present, no way for detecting the damage of the casing more intuitively is available at home and abroad.
Disclosure of Invention
The invention aims to provide a probe type casing damage detection device and method, which adopt a multi-layer and multi-probe structure and are matched with an adjustable electric control centralizer for assistance, and can more quickly and intuitively judge various problems of a casing according to the stretching degree of a probe.
For realizing above-mentioned purpose, the application provides a probe-type cover decreases detection device, including the automatically controlled centralizer that is located both sides about the detection body be equipped with the multilayer between the automatically controlled centralizer and detect the ring, it all installs on the detection body to detect the ring.
Furthermore, the detection ring is three layers, each detection ring layer comprises 4 detection machines which are arranged in an equal division mode, and the detection machines are connected with the detection ring motor.
Further, during detection, the 12 detectors in the three layers are in equal angular distance positions on one circumference of the axial projection.
Furthermore, the detector comprises a detection needle arranged in the radial direction, the rear end of the detection needle is connected with a reed of the armature, a permanent magnet is arranged on one side of the reed of the armature, and an iron core and a coil assembly, of which the magnetic field is opposite to that of the permanent magnet after the permanent magnet is electrified, are arranged on the inner side of the permanent magnet.
Furthermore, 4 probe needles located in the same layer are all installed on the core rod inside the detection ring.
Furthermore, displacement sensors are arranged on the periphery of the detection needle connected with the core rod, and the detection result of each displacement sensor is sent to the data processing unit.
Furthermore, the data processing unit sends the data collected by the displacement sensor to the singlechip after differential amplification and rectification filtering in sequence.
Furthermore, the detection ring motors are connected with the single chip microcomputer, during detection, the detection ring motors drive the detection rings to rotate, and the single chip microcomputer enables the three detection rings to be longitudinally different from each other by 30 degrees, so that 360-degree sleeve loss detection at the same depth and rapid sleeve loss detection at different depths are realized; the detection ring motor drives the detection needle to extend out, and various problems of the current sleeve are judged according to the extending length of the detection needle.
As a further step, the electronic control centralizer comprises a centralizer motor and a centralizing mechanism, the centralizing mechanism comprises an upper support arm, a roller and a lower support arm, the centralizer motor is located inside the shell and is connected with one end of the upper support arm, the other end of the upper support arm is connected with one end of the lower support arm through the roller, the roller is located outside the shell, the other end of the lower support arm is connected with a lead screw, and the lead screw is connected with the centralizer motor.
As a further step, the centralizing mechanisms are 3 groups and are uniformly arranged on the peripheries of the motor and the screw rod of the centralizer.
The application also provides a probe-type casing damage detection method, which comprises the following steps:
the casing damage detection device is placed in a well, after the casing damage detection device reaches a specified position, a centralizer motor starts to work to drive a lead screw to rotate, the lead screw drives a lower support arm and an upper support arm to move towards the direction of the centralizer motor and to be supported, when the lead screw reaches the specified position, the upper support arm and the lower support arm are completely supported, and at the moment, a roller is in contact with the inner wall of a casing;
when the sleeve loss detection is carried out, the detection ring motor b drives the detection ring b, and the detection ring motor c drives the detection ring c to rotate clockwise, so that the longitudinal difference between the three detection rings is 30 degrees, and then the detection machines in the detection rings start to work sequentially.
Further, the working process of the detecting machine in each detection ring comprises:
firstly, a coil c is electrified, an electromagnet consisting of an iron core c and the coil c generates a magnetic field opposite to the permanent magnet c, so that the attraction force of the permanent magnet c is reduced, when the attraction force is small to a certain degree, the reed of the armature c can be released mechanically, a core rod c is pushed to extend a detection needle c, the detection needle c is contacted with the inner wall of a sleeve to generate displacement, and a pressure type displacement sensor c converts a displacement signal corresponding to the extension of the detection needle c into an electric signal and transmits the electric signal to a data processing unit; the data processing unit can judge whether the sleeve has the problems of cracks, holes, deformation, diameter reduction and the like through the depth length of the probe; when the pulse current disappears, the coil c loses current, the iron core c loses magnetism, the reed of the armature c is attracted back by the permanent magnet c, and the detection needle c retracts.
Further, the working process of the detecting machine in each detection ring further comprises:
detect ring motor c drive and detect ring c and survey the completion back in proper order in clockwise 30 angles, continue to survey at same degree of depth by next layer detection ring b, detect ring c and continue the detection of next degree of depth and detect, wait to detect ring b and survey the completion back in proper order in clockwise 30 angles, continue to survey at same degree of depth by next layer detection ring a, detect ring b and continue the detection of next degree of depth, wait to detect ring a and survey the completion back in proper order in clockwise 30 angles, realize that 360 sleeve losses of same degree of depth detect, the quick sleeve losses of different degree of depth detect.
Compared with the prior art, the technical scheme adopted by the invention has the advantages that: the detection ring of the probe needle is matched with the electric control centralizer for assistance, and the problem of the current casing pipe is judged according to the extending length of the probe needle, so that the casing damage detection is more visual. The structure is novel, and the detection accuracy is high.
Drawings
FIG. 1 is a schematic diagram of a probe-type casing damage detection apparatus;
FIG. 2 is a top view of a detection ring;
FIG. 3 is a top view of the electronically controlled centralizer;
FIG. 4 is an enlarged view of the structure of the detection ring;
FIG. 5 is a data processing unit work flow diagram;
the sequence numbers in the figures illustrate: 1-an electric control centralizer a; 2-detection loop a; 3-detection ring b; 4-detection loop c; 5-an electrically controlled centralizer b; 1.1-cable interface; 1.2-a centralizer motor; 1.3-upper support arm; 1.4-roller; 1.5-lower arm; 1.6-lead screw; 1.7-instrument interface; 2.1-detector a; 2.2-detecting ring motor a; 2.3-detector c; 2.4-detector b; 2.5-detector d; 3.1-detecting machine e; 3.2-detecting ring motor b; 3.3-detector g; 3.4-detector f; 3.5-detector h; 4.1-detector i; 4.2-detecting ring motor c; 4.3-detecting machine k; 4.4-prober j; 4.5-detecting machine l; 4.1.1-probe pin c; 4.1.2-armature c; 4.1.3-permanent magnet c; 4.1.4-coil c; 4.1.5-iron core c; 4.1.6-displacement sensor c; 4.1.7-core rod c.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are only a subset of, and not all embodiments of the application. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It is noted that relational terms such as the terms "a" and "b," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1 to 5, the present embodiment provides a probe-type casing damage detection apparatus, which includes an electrically controlled centralizer a and an electrically controlled centralizer b disposed at two upper and lower positions outside a detection pipe, and 3 layers of detection rings (a detection ring a, b detection ring b, c detection ring) are disposed between the electrically controlled centralizer a and the electrically controlled centralizer b. Each layer of detection ring includes 4 detecting machines that the equipartition set up to be provided with the rotatory detection ring motor of drive, be used for the drive to correspond and detect the ring rotatory, make when detecting, three-layer 12 detecting machines (detecting machine a, detecting machine b, detecting machine c, detecting machine d, detecting machine e, detecting machine f, detecting machine g, detecting machine h, detecting machine i, detecting machine j, detecting machine k, detecting machine l) are in the equidistance position on a circumference of axial projection.
Each detector comprises a detection needle arranged in the radial direction, the rear end of the detection needle is connected with a reed of an armature, a permanent magnet is arranged on one side of the reed of the armature, and an iron core and a coil assembly with a magnetic field opposite to that of the permanent magnet after electrification are arranged on the inner side of the permanent magnet;
4 detection needles on the same layer are all arranged on a core rod in the detection ring, displacement sensors are arranged on the peripheries of the detection needles connected with the core rod, and the detection result of each displacement sensor is sent to a data processing unit; and the data processing unit sends the data acquired by the displacement sensor to the singlechip after differential amplification and rectification filtering in sequence.
When detecting, it is rotatory to detect ring motor drive and detect the ring, makes vertical mutual difference 30 between the three detection ring, realizes that 360 sleeve losses of same degree of depth detect, the quick sleeve losses of the different degree of depth detect, detects that the ring motor orders about the probe and stretches out, judges the various problems that present sleeve pipe exists according to the length that the probe stretches out to it is more directly perceived to make the sleeve losses detect.
The embodiment also provides a probe-type casing damage detection method, which includes:
the cable is connected with a cable interface 1.1 of the electric control centralizer a, then is connected with the detection pipe body through an instrument interface 1.7, and then the electric control centralizer b is also connected to the detection pipe body. The whole body is placed in a well, after the body reaches a designated position, the probe type casing damage detection device is electrified through the cable interface 1.1, then the centralizer motor starts to work, the screw rod is driven to rotate, and the screw rod drives the lower support arm and the upper support arm to move towards the direction of the centralizer motor and be supported; when the screw rod reaches a specified position, the upper support arm and the lower support arm are completely supported, at the moment, the upper and lower groups of support arms are completely supported, so that the device is centered, the roller is contacted with the inner wall of the casing, when the device is lifted up or lowered down, the roller of the centralizer greatly reduces the friction with the inner wall of the casing, and the abrasion of the inner wall of the casing is reduced to the maximum extent;
when sleeve loss detection is carried out, a detection ring motor 3.2 drives a detection ring 3, a detection ring motor 4.2 drives a detection ring 4 to rotate clockwise, and the single chip microcomputer controls the detection ring motors to enable the three detection rings to longitudinally differ by 30 degrees;
the detection machine in the detection ring starts to work, each detection needle receives a detection needle driving signal, the coil c4.1.4 is electrified, the electromagnet consisting of the iron core c4.1.5 and the coil c4.1.4 generates a magnetic field opposite to the permanent magnet c4.1.3, so that the suction force of the permanent magnet c4.1.3 is reduced, when the suction force is small to a certain degree, the mechanical energy on the reed of the armature c4.1.2 is released, the core rod c4.1.7 is pushed to extend the detection needle c4.1.1, the detection needle c4.1.1 is contacted with the inner wall of the sleeve to generate displacement, the pressure type displacement sensor c4.1.5 converts the displacement signal extending out of the detection needle c4.4.1 into an electric signal and transmits the electric signal to the data processing unit, and the sleeve can be judged whether the problems of cracks, holes, deformation, reducing and the like exist or not according to the deep length of the detection needle.
When the pulse current disappears, the coil c4.1.4 loses current, the iron core c4.1.5 loses magnetism, the reed of the armature c4.1.2 is sucked back by the permanent magnet c4.1.3, and the probe needle c4.1.1 retracts. Detect ring motor c4.2 drive and detect ring c4 and survey the completion back in proper order in clockwise 30 angles, continue to survey at same degree of depth by next layer detection ring b3, detect ring c4 and continue the detection of next degree of depth, wait to detect ring b3 and survey the completion back in proper order in clockwise 30 angles, continue the probe needle at same degree of depth by next layer detection ring a2, detect ring b3 and continue the probe needle detection of next degree of depth, 3 layers detect the ring and survey the completion back, realize that 360 sleeve losses of same degree of depth detect, the quick sleeve losses of different degree of depth detect.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (13)
1. The utility model provides a probe-type cover decreases detection device, its characterized in that, is including the automatically controlled centralizer that is located the upper and lower both sides of detection body be equipped with the multilayer between the automatically controlled centralizer and detect the ring, it all installs on the detection body to detect the ring.
2. The apparatus according to claim 1, wherein the detecting ring has three layers, each detecting ring comprises 4 detecting machines arranged in equal parts, and the detecting machines are connected with a detecting ring motor.
3. The apparatus according to claim 2, wherein 12 probes of three layers are located at equal angular intervals on a circumference of the axial projection.
4. The probe type casing damage detection device according to claim 2 or 3, wherein the detector comprises a radial probe, the rear end of the probe is connected with a spring of the armature, a permanent magnet is arranged on one side of the spring of the armature, and an iron core and a coil assembly with a magnetic field opposite to that of the permanent magnet after being electrified are arranged inside the permanent magnet.
5. The apparatus of claim 4, wherein the 4 probes in the same layer are all mounted on a core rod inside the detection ring.
6. The apparatus according to claim 5, wherein displacement sensors are mounted on the outer circumference of the probe pin connected to the core rod, and the detection result of each displacement sensor is sent to the data processing unit.
7. The probe-type casing loss detection device of claim 6, wherein the data processing unit sends data collected by the displacement sensor to the single chip after differential amplification and rectification filtering.
8. The probe type casing loss detection device according to claim 2, wherein the detection ring motors are all connected with a single chip microcomputer, during detection, the detection ring motors drive the detection rings to rotate, and the single chip microcomputer enables the three detection rings to longitudinally differ from each other by 30 degrees, so that 360-degree casing loss detection at the same depth and rapid casing loss detection at different depths are realized; the detection ring motor drives the detection needle to extend out, and various problems of the current sleeve are judged according to the extending length of the detection needle.
9. The apparatus according to claim 1, wherein the electrically controlled centralizer comprises a centralizer motor and a centralizer mechanism, the centralizer mechanism comprises an upper arm, a roller, and a lower arm, the centralizer motor is located inside the casing and connected to one end of the upper arm, the other end of the upper arm is connected to one end of the lower arm through the roller, the roller is located outside the casing, the other end of the lower arm is connected to a lead screw, and the lead screw is connected to the centralizer motor.
10. The probe-type casing damage detecting device of claim 9, wherein the centering mechanisms are 3 groups and are uniformly arranged on the peripheries of the motor and the lead screw of the centering device.
11. A probe type casing damage detection method is characterized by comprising the following steps:
lowering the casing damage detecting device according to any one of claims 1-10 into the well, after reaching the specified position, the centralizer motor is operated to rotate the lead screw, the lead screw drives the lower arm and the upper arm to move towards the direction of the centralizer motor and to be spread, and when the lead screw reaches the specified position, the upper arm and the lower arm are fully spread, and the roller is in contact with the inner wall of the casing;
when the sleeve loss detection is carried out, the detection ring motor b drives the detection ring b, and the detection ring motor c drives the detection ring c to rotate clockwise, so that the longitudinal difference between the three detection rings is 30 degrees, and then the detection machines in the detection rings start to work sequentially.
12. The method according to claim 11, wherein the operation of the prober in each of the test rings comprises:
firstly, a coil c is electrified, an electromagnet consisting of an iron core c and the coil c generates a magnetic field opposite to the permanent magnet c, so that the attraction force of the permanent magnet c is reduced, when the attraction force is small to a certain degree, the reed of the armature c can be released mechanically, a core rod c is pushed to extend a detection needle c, the detection needle c is contacted with the inner wall of a sleeve to generate displacement, and a pressure type displacement sensor c converts a displacement signal corresponding to the extension of the detection needle c into an electric signal and transmits the electric signal to a data processing unit; the data processing unit can judge whether the sleeve has the problems of cracks, holes, deformation and diameter reduction through the depth length of the probe; when the pulse current disappears, the coil c loses current, the iron core c loses magnetism, the reed of the armature c is attracted back by the permanent magnet c, and the detection needle c retracts.
13. The method of claim 12, wherein the operation of the prober in each of the test rings further comprises:
detect ring motor c drive and detect ring c and survey the completion back in proper order in clockwise 30 angles, continue to survey at same degree of depth by next layer detection ring b, detect ring c and continue the detection of next degree of depth and detect, wait to detect ring b and survey the completion back in proper order in clockwise 30 angles, continue to survey at same degree of depth by next layer detection ring a, detect ring b and continue the detection of next degree of depth, wait to detect ring a and survey the completion back in proper order in clockwise 30 angles, realize that 360 sleeve losses of same degree of depth detect, the quick sleeve losses of different degree of depth detect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111386331.XA CN114198085B (en) | 2021-11-22 | 2021-11-22 | Probe type sleeve damage detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111386331.XA CN114198085B (en) | 2021-11-22 | 2021-11-22 | Probe type sleeve damage detection device and method |
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| CN114198085A true CN114198085A (en) | 2022-03-18 |
| CN114198085B CN114198085B (en) | 2024-07-12 |
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| CN202111386331.XA Active CN114198085B (en) | 2021-11-22 | 2021-11-22 | Probe type sleeve damage detection device and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1712668A (en) * | 2005-07-13 | 2005-12-28 | 吉林大学 | Magnetic detector of perforation evelet quality for oil well casing pipe |
| US20110132082A1 (en) * | 2009-11-16 | 2011-06-09 | Schlumberger Technology Corporation | Measuring probe for oil and gas wells and/or casings |
| CN202024984U (en) * | 2011-02-24 | 2011-11-02 | 中国海洋大学 | Ocean stand pipe nondestructive testing device and centralizer thereof |
| CN204457486U (en) * | 2015-01-04 | 2015-07-08 | 中国石油天然气股份有限公司 | Electric control centralizer |
| CN213928340U (en) * | 2020-12-29 | 2021-08-10 | 克拉玛依四维石油科技有限公司 | Directional well casing damage electromagnetic detection device |
-
2021
- 2021-11-22 CN CN202111386331.XA patent/CN114198085B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1712668A (en) * | 2005-07-13 | 2005-12-28 | 吉林大学 | Magnetic detector of perforation evelet quality for oil well casing pipe |
| US20110132082A1 (en) * | 2009-11-16 | 2011-06-09 | Schlumberger Technology Corporation | Measuring probe for oil and gas wells and/or casings |
| CN202024984U (en) * | 2011-02-24 | 2011-11-02 | 中国海洋大学 | Ocean stand pipe nondestructive testing device and centralizer thereof |
| CN204457486U (en) * | 2015-01-04 | 2015-07-08 | 中国石油天然气股份有限公司 | Electric control centralizer |
| CN213928340U (en) * | 2020-12-29 | 2021-08-10 | 克拉玛依四维石油科技有限公司 | Directional well casing damage electromagnetic detection device |
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| CN114198085B (en) | 2024-07-12 |
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