CN201536041U - Magnet for full diameter core analyzer - Google Patents
Magnet for full diameter core analyzer Download PDFInfo
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- CN201536041U CN201536041U CN2009202225220U CN200920222522U CN201536041U CN 201536041 U CN201536041 U CN 201536041U CN 2009202225220 U CN2009202225220 U CN 2009202225220U CN 200920222522 U CN200920222522 U CN 200920222522U CN 201536041 U CN201536041 U CN 201536041U
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- yoke plates
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Abstract
A magnet for full diameter core analyzer is applied in the petroleum exploration and development core analysis technical field. The magnet is mainly composed of pole plates, magnetic steel, pole rings, two yoke plates and two side yoke plates. The two side yoke plates are parallel to each other and vertically fixed on the two ends of the two yoke plates. The two side yoke plates and the two yoke plates form a frame body, which provides a closed magnet circuit for the magnet. In the opposite inner side surfaces of the two yoke plates is respectively provided a group of magnetic steel for providing magnetic source for the magnet. In the opposite planes of the magnetic steel is respectively fixed a pole plate for redistributing the magnetic lines. In the periphery of the pole plate outboard are provided pole rings for magnetic concentrating. The utility model can satisfy the demands of a full diameter core experimental analysis with the diameter no less than 120mm. The permanent magnet adopted in the utility model is a closed magnetic circuit which has little magnetic leakage and good initial field uniformity.
Description
Technical field
The utility model relates to petroleum exploration and development core analysis technical field, and particularly a kind of probe of nulcear magnetic resonance (NMR) rock sample analyzer is a kind of special-purpose magnet of whole core analysis instrument.
Background technology
At present, in the oil field prospecting exploitation, the nuclear magnetic resonance equipment that carries out core analysis mainly contains two classes: a class is the high-field nuclear magnetic resonance imaging system, this kind equipment function is strong, can carry out the two and three dimensions imaging and the processing of rock core, be widely used in the development experiments process determining of oil, water saturation, and the mensuration of complex parameters such as the again distribution of crude oil in the duct, phase permeability, displacement efficiency in the displacement process.But this quasi-instrument cost is extremely expensive, and volume is big, and operational environment requires high, generally only adapts to specialized laboratory and uses; Second class is a low-field nuclear magnetic resonance core analysis instrument, has nuclear-magnetism measurement function commonly used, can record multiple petrophysical parameter, and this kind equipment cost is relatively low, and volume is little, and amount is light, relatively is fit to oil field common laboratory and on-the-spot the use.Carry out the oil core analysis with nulcear magnetic resonance (NMR), can from a rock sample, obtain multiple parameters such as porosity (total porosity, effecive porosity, clay-bound water porosity etc.), movable fluid percentage, pore-size distribution and permeability, remarkable advantage with Non-Destructive Testing, a machine multi-parameter, a sample multi-parameter.But present low-field nuclear magnetic resonance core analysis instrument detecting area is little, and crannied for those, macroporous nonuniformity rock core can't be measured.
China oil field is based on the continental deposit oil field.Main feature is that reservoir exists serious anisotropism, so adopt nulcear magnetic resonance (NMR) whole core analysis and nulcear magnetic resonance (NMR) standard core analysis no less important.Whole core analysis is suitable for that those are crannied, macroporous heterogeneous core.Have a lot of secondary porosities (crack and deliquescent) in carbonatite, using whole core analysis can be more accurate.The full-hole core permeability is reflecting the influence in solution cavity and crack, and the standard core analysis does not comprise hole and crack usually, so the permeability that whole core analysis is surveyed is near true stratum condition.
The utility model content
The purpose of this utility model is: a kind of magnet that is used for the whole core analysis instrument is provided, is suitable for full diameter nulcear magnetic resonance (NMR) rock sample analyzer and uses, have and can be satisfied with the uniform magnetic field zone that full-hole core is measured, and the magnetic field good stability.Be fit to analyze crannied macroporous heterogeneous core.
The technical solution adopted in the utility model is: the magnet that is used for the whole core analysis instrument, mainly form by pole plate 1, magnet steel 2, polar ring 3, yoke plate 4 and side yoke plate 5, it is characterized in that: yoke plate 4 is for dull and stereotyped, the length of yoke plate 4 is between 560～600mm, width is between 400～550mm, and thickness is between 10～20mm.Side yoke plate 5 is dull and stereotyped, and side yoke plate 5 length are between 400～550mm, and width is between 300～450mm, and thickness is between 10～20mm.Two side yoke plates 5 are parallel to each other and are vertically fixed on the two ends of two yoke plates 4.Two side yoke plates 5 and two yoke plates 4 are formed a framework, form the loop of a closure for magnet.Opposed inside face at two yoke plates 4 is fixed with a magnet steel 2 respectively.The length of magnet steel 2 is between 460～500mm, and width is between 300～450mm, and thickness is between 10～20mm.Magnet steel 2 is as magnetic source.On the relative plane of magnet steel 2, be fixed with a pole plate 1 respectively.The length of pole plate 1 is between 480～520mm, and width is between 320～470mm, and thickness is between 10～20mm.Pole plate 1 plays the magnetic conduction effect.
What described yoke plate 4 and side yoke plate 5 adopted is the A3 steel.What magnet steel 2 adopted is 2: 17 SmCos (2: 17SmCo) permanent magnetic material.That pole plate 1 adopts is electrical pure iron DT4.
Described magnet steel 2 is that each magnetic patch is 50 * 50 * 16mm by 49 bonding forming of magnetic patch, and magnetizing direction is 16.
The manufacturing process that is used for the magnet of whole core analysis instrument:
Making comprises bonding, magnet steel 2 debugging of magnet steel 2 and assembles three steps;
1. magnet is bonding
Each magnet steel 2 is made up of 49 magnetic patch, but each magnetic patch all has stronger magnetic, and the polarised direction between each magnetic patch has identical projecting direction in the same coordinate system, so the magnetic force between each magnetic patch shows repulsion.By instrument with magnet steel 2 of the bonding one-tenth of these magnetic patch.
2. magnet debugging
The uneven reason in magnetic field has, the influence of magnet edge effect; The magnet machining error; The magnetic material performance difference; Temperature Influence.
The method of shimming is that mechanical compensation is regulated the relative position or the introducing of pole plate, adjusting air gap and had a snack thing; Electromagnetic compensation, shim coil.
The magnet that is used for the whole core analysis instrument, the shimming district of formation is a diameter 120mm, the cylinder of long 100mm, the working gas gap L=180mm of this magnet, B
0=0.102T, resonance frequency 4.34MHz, the unevenness in magnetic field≤2.0 * 10
-4
The beneficial effects of the utility model: the utility model is used for the magnet of whole core analysis instrument, can satisfy the core experiment analysis that the full-hole core diameter is no more than 120mm.Used permanent magnet is the closo magnetic circuit, and leakage field is few, the initial field good evenness.
Description of drawings
Fig. 1 is the magnet assembly structure schematic diagram that the utility model is used for the whole core analysis instrument.
Fig. 2 is the axle side schematic diagram that is used for the magnet of whole core analysis instrument.
Among the figure, 1. pole plate, 2. magnet steel, 3. polar ring, 4. yoke plate, 5. side yoke plate.
Embodiment
Embodiment 1: with a magnet that is used for the whole core analysis instrument is example, and the utility model is described in further detail.
Consult Fig. 1.The utility model is used for the magnet of whole core analysis instrument, mainly is made up of pole plate 1, magnet steel 2, polar ring 3, yoke plate 4 and side yoke plate 5.
Opposed inside face at two yoke plates 4 is fixed with a magnet steel 2 respectively.The length 480mm of magnet steel 2, width are 450mm, and thickness is 16mm.Described magnet steel 2 is by 49 bonding forming of magnetic patch.Magnet steel 2 is as magnetic source.
On the relative plane of magnet steel 2, be fixed with a pole plate 1 respectively.The length of pole plate 1 is between the 500mm, and width is 470mm, and thickness is 20mm.Pole plate 1 plays the magnetic conduction effect.
What described yoke plate 4 and side yoke plate 5 adopted is the A3 steel.What magnet steel 2 adopted is 2: 17 SmCos (2: 17SmCo) be permanent magnetic material.That pole plate 1, polar ring 3 adopt is DT4.Polar ring 3 is embedded on the pole plate 1.
Claims (3)
1. magnet that is used for the whole core analysis instrument, mainly by pole plate (1), magnet steel (2), polar ring (3), yoke plate (4) and side yoke plate (5) are formed, it is characterized in that: yoke plate (4) is for dull and stereotyped, the length of yoke plate (4) is between 560～600mm, width is between 400～550mm, thickness is between 10～20mm, side yoke plate (5) is dull and stereotyped, the length of side yoke plate (5) is between 400～550mm, width is between 300～450mm, thickness is between 10～20mm, two side yoke plates (5) are parallel to each other and are vertically fixed on the two ends of two yoke plates (4), two side yoke plates (5) are formed a framework with two yoke plates (4), opposed inside face at two yoke plates (4) is fixed with a magnet steel (2) respectively, the length of magnet steel (2) is between 460～500mm, width is between 300～450mm, thickness is between 10～20mm, on the relative plane of magnet steel (2), be fixed with a pole plate (1) respectively, the length of pole plate (1) is between 480～520mm, width is between 320～470mm, and thickness is between 10～20mm.
2. the magnet that is used for the whole core analysis instrument according to claim 1 is characterized in that: what described yoke plate (4) and side yoke plate (5) adopted is the A3 steel, and what magnet steel (2) adopted is the 2:17 samarium-cobalt permanent-magnetic material, and that pole plate (1) adopts is electrical pure iron DT4.
3. the magnet that is used for the whole core analysis instrument according to claim 1 is characterized in that: described magnet steel (2) is that each magnetic patch is 50 * 50 * 16mm by 49 bonding forming of magnetic patch, and magnetizing direction is 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202225220U CN201536041U (en) | 2009-09-15 | 2009-09-15 | Magnet for full diameter core analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202225220U CN201536041U (en) | 2009-09-15 | 2009-09-15 | Magnet for full diameter core analyzer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201536041U true CN201536041U (en) | 2010-07-28 |
Family
ID=42535818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202225220U Expired - Lifetime CN201536041U (en) | 2009-09-15 | 2009-09-15 | Magnet for full diameter core analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201536041U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110511A (en) * | 2010-12-27 | 2011-06-29 | 诸暨意创磁性技术有限公司 | Magnetic box generating parallel and homogenous magnetic field |
| CN109254254A (en) * | 2018-09-10 | 2019-01-22 | 中国石油天然气股份有限公司 | permanent magnet for nuclear magnetic resonance device |
| CN113567540A (en) * | 2021-07-27 | 2021-10-29 | 安徽省国盛量子科技有限公司 | Steel wire rope nondestructive testing equipment, system and method |
-
2009
- 2009-09-15 CN CN2009202225220U patent/CN201536041U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110511A (en) * | 2010-12-27 | 2011-06-29 | 诸暨意创磁性技术有限公司 | Magnetic box generating parallel and homogenous magnetic field |
| CN102110511B (en) * | 2010-12-27 | 2012-08-08 | 诸暨意创磁性技术有限公司 | Magnetic box generating parallel and homogenous magnetic field |
| CN109254254A (en) * | 2018-09-10 | 2019-01-22 | 中国石油天然气股份有限公司 | permanent magnet for nuclear magnetic resonance device |
| CN113567540A (en) * | 2021-07-27 | 2021-10-29 | 安徽省国盛量子科技有限公司 | Steel wire rope nondestructive testing equipment, system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100728 |