CN108565087A - NMR logging instrument and its nuclear magnetic resonance permanent magnet - Google Patents
NMR logging instrument and its nuclear magnetic resonance permanent magnet Download PDFInfo
- Publication number
- CN108565087A CN108565087A CN201810178414.1A CN201810178414A CN108565087A CN 108565087 A CN108565087 A CN 108565087A CN 201810178414 A CN201810178414 A CN 201810178414A CN 108565087 A CN108565087 A CN 108565087A
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- Prior art keywords
- permanent magnet
- metal
- metal permanent
- magnetic resonance
- logging instrument
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- 238000005481 NMR spectroscopy Methods 0.000 title claims abstract description 88
- 239000002184 metal Substances 0.000 claims abstract description 131
- 229910052751 metal Inorganic materials 0.000 claims abstract description 131
- 230000005389 magnetism Effects 0.000 claims description 10
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 8
- 230000004323 axial length Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 230000005311 nuclear magnetism Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 8
- 239000007769 metal material Substances 0.000 description 8
- 230000006698 induction Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0273—Magnetic circuits with PM for magnetic field generation
- H01F7/0294—Detection, inspection, magnetic treatment
-
- 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
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Geophysics (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
The embodiment of the present application provides a kind of NMR logging instrument and its nuclear magnetic resonance permanent magnet, the nuclear magnetic resonance permanent magnet, including the first metal permanent magnet and the second metal permanent magnet；The first metal permanent magnet and the second metal permanent magnet are coaxial and symmetrical；The magnetic direction of the first metal permanent magnet and the second metal permanent magnet is orientation direction and direction is opposite；The first metal permanent magnet and the second metal permanent magnet are separated from each other, to be centrally formed the antenna mounting locations of NMR logging instrument in separated space.The embodiment of the present application can not increase or decrease the volume of NMR logging instrument while improving the identification of formation resolution ratio of NMR logging instrument.
Description
Technical field
This application involves NMR logging tools, forever more particularly, to a kind of NMR logging instrument and its nuclear magnetic resonance
Magnet.
Background technology
Nuclear magnetic resonance permanent magnet is the critical component on NMR logging instrument.When carrying out nuclear magnetic resonance log, nuclear-magnetism
Resonance permanent magnet can generate gradient magnetic in the earth formation, the polarization of horizontal direction be carried out to the hydrogen atom in stratum, over the ground with this
Hydrogen atom in layer generates the polarization of different magnetic field intensity on different radial depths, with reach to the stratum of different depth into
The purpose of row petrophysical information measurement.
During realizing the application, present inventor, which studies, to be found：Although the magnetic of the permanent magnet of metal material
Field intensity is relatively stronger, but since nuclear magnetic resonance principle requires transmitting antenna to be located at permanent magnet center, and the radio frequency of transmitting antenna
Signal also will be perpendicular to the magnetic field of permanent magnet；And transmitting antenna is when being located at the center of metal material permanent magnet, it can be to transmitting antenna
The radiofrequency signal sent out causes serious shielding to interfere.Therefore, existing nuclear magnetic resonance permanent magnet is mostly non-metallic material at present
Matter (such as metal oxide material etc.).
However, since the magnetic field intensity of the permanent magnet of non-metallic material is relatively weak, to enable nuclear magnetic resonance permanent magnet
Reach preset identification of formation resolution ratio, generally require the size for increasing nuclear magnetic resonance permanent magnet, is surveyed so as to cause nuclear magnetic resonance
The volume of well instrument increases.
Invention content
The embodiment of the present application is designed to provide a kind of NMR logging instrument and its nuclear magnetic resonance permanent magnet, to realize
While improving the identification of formation resolution ratio of NMR logging instrument, the volume of NMR logging instrument is not increased or decreased.
In order to achieve the above objectives, on the one hand, the embodiment of the present application provides a kind of nuclear magnetic resonance permanent magnet, including the first gold medal
Belong to permanent magnet and the second metal permanent magnet；The first metal permanent magnet and the second metal permanent magnet are coaxial and symmetrical；Institute
The magnetic direction for stating the first metal permanent magnet and the second metal permanent magnet is orientation direction and direction is opposite；Described first
Metal permanent magnet and the second metal permanent magnet are separated from each other, to be centrally formed NMR logging instrument in separated space
Antenna mounting locations.
In the nuclear magnetic resonance permanent magnet of the embodiment of the present application, the first metal permanent magnet and the second metal permanent magnetism
Body is separated from each other distance to a declared goal.
In the nuclear magnetic resonance permanent magnet of the embodiment of the present application, the first metal permanent magnet and the second metal permanent magnetism
Body includes pillar support body, and the cylindrical magnet structure for coating the pillar support outside and being fixed thereon.
In the nuclear magnetic resonance permanent magnet of the embodiment of the present application, the cylindrical magnet structure is bonded by SmCo magnetic sheet.
In the nuclear magnetic resonance permanent magnet of the embodiment of the present application, the pillar support body is cylindrical structure, the tubular
Magnet structure is cylindrical structure.
In the nuclear magnetic resonance permanent magnet of the embodiment of the present application, the first metal permanent magnet and the second metal permanent magnetism
The axial length of a diameter of 60~130mm of body, the first metal permanent magnet and the second metal permanent magnet be 300~
800mm。
On the other hand, the embodiment of the present application also provides a kind of NMR logging instruments, are configured with nuclear magnetic resonance permanent magnetism
Body and transmitting antenna, the nuclear magnetic resonance permanent magnet include the first metal permanent magnet and the second metal permanent magnet；First gold medal
Belong to permanent magnet and the second metal permanent magnet is coaxial and symmetrical；The first metal permanent magnet and the second metal permanent magnet
Magnetic direction be orientation direction and direction is opposite；The first metal permanent magnet and the second metal permanent magnet divide each other
From to be centrally formed the antenna mounting locations of NMR logging instrument in separated space；The transmitting antenna is set to described
Antenna mounting locations.
In the NMR logging instrument of the embodiment of the present application, the first metal permanent magnet and the second metal permanent magnetism
Body is separated from each other distance to a declared goal.
In the NMR logging instrument of the embodiment of the present application, the first metal permanent magnet and the second metal permanent magnetism
Body includes pillar support body, and the cylindrical magnet structure for coating the pillar support outside and being fixed thereon.
In the NMR logging instrument of the embodiment of the present application, the cylindrical magnet structure is bonded by SmCo magnetic sheet.
In the NMR logging instrument of the embodiment of the present application, the pillar support body is cylindrical structure, the tubular
Magnet structure is cylindrical structure.
In the NMR logging instrument of the embodiment of the present application, the first metal permanent magnet and the second metal permanent magnetism
The axial length of a diameter of 60~130mm of body, the first metal permanent magnet and the second metal permanent magnet be 300~
800mm。
By the above technical solution provided by the embodiments of the present application as it can be seen that in the embodiment of the present application, nuclear magnetic resonance permanent magnet packet
Include the first metal permanent magnet and the second metal permanent magnet；First metal permanent magnet and the second metal permanent magnet be coaxial and left and right pair
Claim；The magnetic direction of first metal permanent magnet and the second metal permanent magnet is orientation direction and direction is opposite；First metal is forever
Magnet and the second metal permanent magnet are separated from each other, to be centrally formed the antenna installation position of NMR logging instrument in separated space
It sets；Transmitting antenna may be disposed at antenna mounting locations, be located at permanent magnet to meet nuclear magnetic resonance principle requirement transmitting antenna
Requirement of the radiofrequency signal of center and transmitting antenna perpendicular to the magnetic field of permanent magnet.Due to the first metal permanent magnet and second
Metal permanent magnet is the permanent magnet of metal material, and magnetic field intensity is eager to excel very than the permanent magnet of the non-metallic material of the prior art
It is more；Accordingly, with respect to the prior art, the nuclear magnetic resonance permanent magnet of the embodiment of the present application can be higher with the realization of smaller size
Identification of formation resolution ratio reduces the body of nuclear magnetic resonance permanent magnet to realize while improving identification of formation resolution ratio
Product, and then the volume of NMR logging instrument can be advantageously reduced.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, other drawings may also be obtained based on these drawings.In the accompanying drawings：
Fig. 1 is the dimensional structure diagram of the nuclear magnetic resonance permanent magnet of one embodiment of the application；
Fig. 2 a are the radial schematic cross-sectional view of the first metal permanent magnet of one embodiment of the application；
Fig. 2 b are the radial schematic cross-sectional view of the second metal permanent magnet of one embodiment of the application；
Fig. 3 is the axial cross section Magnetic Induction Density Distribution schematic diagram of the nuclear magnetic resonance permanent magnet of one embodiment of the application；
Fig. 4 is the radial section magnetic induction intensity equipotentiality EDS maps signal of nuclear magnetic resonance permanent magnet in one embodiment of the application
Figure；
Fig. 5 is the use state diagram of NMR logging instrument in one embodiment of the application.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The every other embodiment that technical staff is obtained without creative efforts should all belong to the application protection
Range.Such as in being described below, second component is formed above the first component, may include the first component and second component
The embodiment formed in a manner of being in direct contact can also include the first component and second component in a manner of non-direct contact (i.e. the
Can also include additional component between one component and second component) embodiment etc. that is formed.
Moreover, for ease of description, some embodiments of the application can use such as " in ... top ", " ... under ",
The spatially relative terms such as " top ", " lower section ", with description such as each element shown in the drawings of embodiment or component and another
Relationship between (or other) element or component.It should be understood that other than the orientation described in attached drawing, space is opposite
Term, which also aims to, includes the different direction of device in use or operation.If such as the device in attached drawing is reversed, and is described
For the element or component of " " other elements or component " below " or " under ", it will then be positioned as " " other elements or portion
Part " top " or " on ".
NMR logging instrument is typically arranged with nuclear magnetic resonance permanent magnet and transmitting antenna.In some embodiments of the application
In, the nuclear magnetic resonance permanent magnet may include the first metal permanent magnet and the second metal permanent magnet；The first metal permanent magnetism
Body and the second metal permanent magnet are coaxial and symmetrical；The magnetic field of the first metal permanent magnet and the second metal permanent magnet
Direction is orientation direction and direction is opposite；The first metal permanent magnet and the second metal permanent magnet are separated from each other, from
And it is centrally formed the antenna mounting locations of NMR logging instrument in separated space；The transmitting antenna may be disposed at the antenna
Installation site, to meet the radio frequency that nuclear magnetic resonance principle requirement transmitting antenna is located at permanent magnet center and transmitting antenna
Requirement of the signal perpendicular to the magnetic field of permanent magnet.
Since the first metal permanent magnet and the second metal permanent magnet are the permanent magnet of metal material, magnetic field intensity
It is eager to excel than the permanent magnet of the non-metallic material of the prior art very much；Accordingly, with respect to the prior art, in some embodiments of the application
Nuclear magnetic resonance permanent magnet can realize higher identification of formation resolution ratio with smaller size, improving stratum to realize
While recognition resolution, the volume of nuclear magnetic resonance permanent magnet is also reduced, and then NMR logging instrument can be advantageously reduced
Volume.
In some embodiments, although theoretically between the first metal permanent magnet and the second metal permanent magnet
The nearlyr magnetic field intensity of distance is bigger, to more be conducive to improve identification of formation resolution ratio；But have simultaneously to transmitting antenna in this way
Higher requirement (such as transmission power, transmitting antenna size etc. want bigger)；The first metal permanent magnet and described the simultaneously
The distance between two metal permanent magnets are closer, and the space for accommodating transmitting antenna is also just smaller, and smaller space is just difficult to accommodate more
Large-sized transmitting antenna, which forms a kind of contradictions.Therefore, in order to not increase or decrease each other, first metal is forever
The distance between magnet and the second metal permanent magnet can neither be excessive, can not be too small, but need to compromise and consider, i.e. root
According to actual conditions, the first metal permanent magnet and the second metal permanent magnet can be separated from each other to distance to a declared goal.Here
Distance to a declared goal can be obtained in practical situations by experiment or theoretical calculation mode.
Refering to what is shown in Fig. 1, in some embodiments, the magnetic direction of the first metal permanent magnet 1 can be vertically to
On；Correspondingly, the magnetic direction of the second metal permanent magnet 2 can be straight down.Certainly, in another exemplary embodiment party
In formula, the first metal permanent magnet 1 and the second metal permanent magnet 2 can also magnetic direction exchanges.And it is shown in Fig. 1
In embodiment, the transmitting antenna 3 of NMR logging instrument is placed exactly in the first metal permanent magnet 1 and second metal forever
Separated space center between magnet 2 is located at the antenna installation for the NMR logging instrument being centrally formed in the separated space
On position.
Experiment shows for NMR logging instrument, the efficiency of the permanent magnet of cylindrical structure be it is highest, because
This, in the application some embodiments, cylinder can be used in the first metal permanent magnet 1 and the second metal permanent magnet 2
Structure.In conjunction with shown in Fig. 2 a and Fig. 2 b, such as in the application some embodiments, the first metal permanent magnet 1 and described
Two metal permanent magnets 2 may each comprise cylindrical support 11,21, and the cladding cylindrical support 11,21 lateral surfaces
And the cylinder magnet structure 12,22 being fixed thereon, the cylinder magnet structure 12,22 can be identical by multiple magnetic directions
SmCo magnetic sheet bond.In this way, due to SmCo magnetic sheet not only magnetic field intensity compared with strong also insensitive, the circle to temperature change
Cylindrical magnet structure 12,22 can be advantageously implemented high-resolution stabilizing magnetic field using SmCo magnetic sheet.But due to SmCo magnetic
Piece mechanical performance (such as shock resistance, strain resistant ability) is poor, it is therefore desirable to use material (such as the iron of the good mechanical property of cooperation
Equal metals) cylindrical support 11,21 support protection.
In some embodiments it is contemplated that the actual needs of NMR logging instrument, the first metal permanent magnet 1 and institute
The diameter for stating the second metal permanent magnet 2 can be 60~130mm, the first metal permanent magnet 1 and the second metal permanent magnetism
The axial length of body 2 can be 300~800mm；Including the first metal permanent magnet 1 and the second metal permanent magnet 2 exist
The total length of interior nuclear magnetic resonance permanent magnet can be 900~2000mm.The axial isodynamic line cylinder of nuclear magnetic resonance permanent magnet
Face range can be 200~600mm, and the magnetic induction intensity at radius of investigation 400mm can be 60Gs.Specific embodiment, Ke Yigen
Corresponding parameter is selected according to actual needs, wherein axial isodynamic line cylindrical surface range, the investigative range of nuclear magnetic resonance permanent magnet
Deng, can by consider permanent magnet material, the first metal permanent magnet 1 and the second metal permanent magnet 2 diameter,
And the factors such as the distance between described first metal permanent magnet 1 and the second metal permanent magnet 2 determine.
In some embodiments, the axial direction of the first metal permanent magnet of nuclear magnetic resonance permanent magnet and the second metal permanent magnet is cut
Face Magnetic Induction Density Distribution can as shown in figure 3, and each metal permanent magnet radial section magnetic induction intensity equipotentiality EDS maps
It can be as shown in Figure 4.
In some embodiments, in NMR logging instrument, the first metal permanent magnet of nuclear magnetic resonance permanent magnet and
Two metal permanent magnets are the axial alignments along NMR logging instrument.And in actual use, due to nuclear magnetic resonance log
Well used is usually straight well, and NMR logging instrument is longitudinal is put into straight well (as shown in Figure 5).In this way, nuclear magnetic resonance is forever
The the first metal permanent magnet and the second metal permanent magnet of magnet are actually longitudinal arrangement, and what is utilized is such as dotted line in Fig. 3
Magnetostatic field shown in frame is detected.In dotted line frame shown in Fig. 3, the line of magnetic induction is the N from a metal permanent magnet
Pole is sent out, and is entered from the poles S of another metal permanent magnet, in this way, the cooperation of two metal permanent magnets be formed it is required quiet
Magnetic field.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Including so that component or equipment including a series of elements include not only those elements, but also include not clear
The other element listed, or further include for this component or the intrinsic element of equipment.In the feelings not limited more
Under condition, the element that is limited by sentence "including a ...", it is not excluded that in process, method or equipment including the element
In there is also other identical elements.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments, and related place is referring to side
The part of method embodiment illustrates.
Above is only an example of the present application, it is not intended to limit this application.For those skilled in the art
For, the application can have various modifications and variations.It is all within spirit herein and principle made by any modification, equivalent
Replace, improve etc., it should be included within the scope of claims hereof.
Claims (12)
1. a kind of nuclear magnetic resonance permanent magnet, which is characterized in that including the first metal permanent magnet and the second metal permanent magnet；Described
One metal permanent magnet and the second metal permanent magnet are coaxial and symmetrical；The first metal permanent magnet and second metal are forever
The magnetic direction of magnet is orientation direction and direction is opposite；The first metal permanent magnet and the second metal permanent magnet that
This separation, to be centrally formed the antenna mounting locations of NMR logging instrument in separated space.
2. nuclear magnetic resonance permanent magnet as described in claim 1, which is characterized in that the first metal permanent magnet and described second
Metal permanent magnet is separated from each other distance to a declared goal.
3. nuclear magnetic resonance permanent magnet as described in claim 1, which is characterized in that the first metal permanent magnet and described second
Metal permanent magnet includes pillar support body, and the cylindrical magnet for coating the pillar support outside and being fixed thereon
Structure.
4. nuclear magnetic resonance permanent magnet as claimed in claim 3, which is characterized in that the cylindrical magnet structure is glued by SmCo magnetic sheet
It ties.
5. nuclear magnetic resonance permanent magnet as described in claim 3 or 4, which is characterized in that the pillar support body is cylinder knot
Structure, the cylindrical magnet structure are cylindrical structure.
6. nuclear magnetic resonance permanent magnet as claimed in claim 5, which is characterized in that the first metal permanent magnet and described second
A diameter of 60~130mm of metal permanent magnet, the axial length of the first metal permanent magnet and the second metal permanent magnet
For 300~800mm.
7. a kind of NMR logging instrument is configured with nuclear magnetic resonance permanent magnet and transmitting antenna, which is characterized in that the nuclear-magnetism
The permanent magnet that resonates includes the first metal permanent magnet and the second metal permanent magnet；The first metal permanent magnet and the second metal permanent magnetism
Body is coaxial and symmetrical；The magnetic direction of the first metal permanent magnet and the second metal permanent magnet is orientation direction
And direction is opposite；The first metal permanent magnet and the second metal permanent magnet are separated from each other, at separated space center
Form the antenna mounting locations of NMR logging instrument；The transmitting antenna is set to the antenna mounting locations.
8. NMR logging instrument as claimed in claim 7, which is characterized in that the first metal permanent magnet and described second
Metal permanent magnet is separated from each other distance to a declared goal.
9. NMR logging instrument as claimed in claim 8, which is characterized in that the first metal permanent magnet and described second
Metal permanent magnet includes pillar support body, and the cylindrical magnet for coating the pillar support outside and being fixed thereon
Structure.
10. NMR logging instrument as claimed in claim 9, which is characterized in that the cylindrical magnet structure is by SmCo magnetic sheet
Bonding forms.
11. the NMR logging instrument as described in claim 9 or 10, which is characterized in that the pillar support body is cylinder
Structure, the cylindrical magnet structure are cylindrical structure.
12. NMR logging instrument as claimed in claim 11, which is characterized in that the first metal permanent magnet and described
The axial direction of a diameter of 60~130mm of two metal permanent magnets, the first metal permanent magnet and the second metal permanent magnet is long
Degree is 300~800mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810178414.1A CN108565087B (en) | 2018-03-05 | 2018-03-05 | Nuclear magnetic resonance logging instrument and nuclear magnetic resonance permanent magnet thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810178414.1A CN108565087B (en) | 2018-03-05 | 2018-03-05 | Nuclear magnetic resonance logging instrument and nuclear magnetic resonance permanent magnet thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108565087A true CN108565087A (en) | 2018-09-21 |
| CN108565087B CN108565087B (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810178414.1A Active CN108565087B (en) | 2018-03-05 | 2018-03-05 | Nuclear magnetic resonance logging instrument and nuclear magnetic resonance permanent magnet thereof |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113161101A (en) * | 2020-01-20 | 2021-07-23 | 中国石油天然气股份有限公司 | Permanent magnet for nuclear magnetic resonance logging instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1255128A1 (en) * | 1998-03-03 | 2002-11-06 | Schlumberger Limited | Nuclear magnetic resonance apparatus and method for generating a plurality of axisymmetric magnetic fields |
| CN102650208A (en) * | 2012-05-04 | 2012-08-29 | 中国石油大学(北京) | Nuclear magnetic resonance logger probe while drilling and nuclear magnetic resonance logger while drilling |
| CN105114071A (en) * | 2015-09-23 | 2015-12-02 | 中国石油大学(北京) | Nuclear magnetic resonance logging instrument probe with multiple layers of magnets and antenna excitation method |
| CN105240000A (en) * | 2015-09-23 | 2016-01-13 | 中国石油大学(北京) | Multi-detection-depth nuclear magnetic resonance logging instrument and probe thereof and antenna excitation method |
| CN107035367A (en) * | 2017-04-28 | 2017-08-11 | 北京捷威思特科技有限公司 | NMR while drilling instrument magnet |
-
2018
- 2018-03-05 CN CN201810178414.1A patent/CN108565087B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1255128A1 (en) * | 1998-03-03 | 2002-11-06 | Schlumberger Limited | Nuclear magnetic resonance apparatus and method for generating a plurality of axisymmetric magnetic fields |
| CN102650208A (en) * | 2012-05-04 | 2012-08-29 | 中国石油大学(北京) | Nuclear magnetic resonance logger probe while drilling and nuclear magnetic resonance logger while drilling |
| CN105114071A (en) * | 2015-09-23 | 2015-12-02 | 中国石油大学(北京) | Nuclear magnetic resonance logging instrument probe with multiple layers of magnets and antenna excitation method |
| CN105240000A (en) * | 2015-09-23 | 2016-01-13 | 中国石油大学(北京) | Multi-detection-depth nuclear magnetic resonance logging instrument and probe thereof and antenna excitation method |
| CN107035367A (en) * | 2017-04-28 | 2017-08-11 | 北京捷威思特科技有限公司 | NMR while drilling instrument magnet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113161101A (en) * | 2020-01-20 | 2021-07-23 | 中国石油天然气股份有限公司 | Permanent magnet for nuclear magnetic resonance logging instrument |
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| CN108565087B (en) | 2021-01-01 |
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