CN115370314A - Strong magnetic fishing tool and strong magnetic performance testing method - Google Patents
Strong magnetic fishing tool and strong magnetic performance testing method Download PDFInfo
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- CN115370314A CN115370314A CN202210856985.2A CN202210856985A CN115370314A CN 115370314 A CN115370314 A CN 115370314A CN 202210856985 A CN202210856985 A CN 202210856985A CN 115370314 A CN115370314 A CN 115370314A
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 260
- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 239000012535 impurity Substances 0.000 claims abstract description 43
- 230000000903 blocking effect Effects 0.000 claims abstract description 31
- 238000009434 installation Methods 0.000 claims description 39
- 230000001681 protective effect Effects 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 13
- 238000011056 performance test Methods 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 8
- 239000012634 fragment Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 3
- 239000011324 bead Substances 0.000 abstract 1
- 238000003860 storage Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- 238000003801 milling Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010835 comparative analysis Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 208000029154 Narrow face Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock 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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/06—Fishing for or freeing objects in boreholes or wells using magnetic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
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- Fluid Mechanics (AREA)
- Marine Sciences & Fisheries (AREA)
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- Geochemistry & Mineralogy (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
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Abstract
The invention relates to a strong-magnetic fishing tool and a strong-magnetic performance testing method, wherein the strong-magnetic fishing tool comprises a mandrel, a plurality of ribs are arranged on the outer wall of the mandrel at intervals in the circumferential direction, each rib extends from the first end to the second end of the mandrel along the axial direction of the mandrel, and a gap between every two adjacent ribs forms an impurity containing cavity. All set up the mounting groove that runs through its both ends on the both sides face of bead, all inlay in every mounting groove and be equipped with the magnetic stripe structure. Two ends of the mandrel are provided with two end blocking caps which can limit the two ends of the magnetic stripe structure, and the two end blocking caps are locked and fixed through a locking assembly positioned in the mandrel. The magnet is simple and reliable to install and convenient to replace, and the risk of falling into the well does not exist; the invention can also test the performance of the magnet in the strong magnetic fishing tool and has simple operation.
Description
Technical Field
The invention relates to the technical field of strong magnetic fishing, in particular to a strong magnetic fishing tool and a strong magnetic performance testing method.
Background
Wellbore cleaning is a very important step in drilling, completion and other operational procedures. Uncleaned wellbore impurities can cause unexpected problems and cost expenditures, especially in highly deviated, extended reach and ultra deep wells. The downhole impurities are very complex in composition, and may be rock fragments generated during drilling, mud cakes generated from mud, metal fragments generated from milling, cement sheath or cement block generated during well cementation, and burrs generated during perforation, oil casing rust and the like. This debris remaining in the well can lead to thousands of dollars of risk of accidents, and also to inefficient production from the well. In deep well reservoirs, it is often desirable to maximize the annular circulation rate so that dirt in the well does not deposit downhole during operation. Historical data shows that 30% of the downtime is due to debris in the well.
The underground strong-magnetic fishing tool is mainly used for removing underground ferrous metal impurities, such as metal debris generated by casing windowing and packer milling. The tool contains special magnets to collect and recover metal debris from the well fluid. The new strong magnetic fishing tool for deep wells contains a non-rotating centralizer to prevent collected debris from falling out when the tool is removed from the casing. The key performance of the strong magnetic fishing tool comprises the temperature resistance of the magnet and the strength of a magnetic field, and whether the magnet is easy to fall off after being adsorbed on the tool.
However, the installation method of the key parts of the existing strong magnetic fishing tool requires external bolts, rings and the like, and the bolts and the rings may fall into the well, so that the risk of falling into the well exists. Meanwhile, the magnetic strip is also very important to be replaced conveniently, because the whole mandrel can be checked before the deep well is put into the well, the magnet is weakened due to temperature and vibration, the magnetic strip needs to be replaced sometimes, but the magnetic strip is not convenient to replace when the existing tool is used. In addition, no special testing device and method can test the performance of the magnet in the strong-magnetic fishing tool, so that the performance of the strong-magnetic fishing tool cannot be effectively optimized, and the using effect is ensured.
Therefore, the inventor provides a strong magnetic fishing tool and a strong magnetic performance testing method by virtue of experience and practice of related industries for many years, so as to overcome the defects in the prior art.
Disclosure of Invention
The invention aims to provide a strong-magnetic fishing tool, the installation of a magnet is simple and reliable, the replacement is convenient, and the risk of falling into a well does not exist.
The invention also aims to provide a strong magnetic performance testing method which can test the performance of the magnet in the strong magnetic fishing tool and is simple to operate.
The above object of the present invention can be achieved by the following technical solutions:
the invention provides a strong-magnetic fishing tool, which comprises a mandrel, wherein a plurality of convex edges are arranged on the outer wall of the mandrel at intervals in the circumferential direction, each convex edge extends from the first end to the second end of the mandrel along the axial direction of the mandrel, and a gap between every two adjacent convex edges forms an impurity containing cavity; two side surfaces of the convex edge are respectively provided with a mounting groove which penetrates through two ends of the convex edge, and a magnetic strip structure is embedded in each mounting groove; two ends of the mandrel are provided with two end blocking caps capable of limiting the two ends of the magnetic stripe structure, and the two end blocking caps are locked and fixed through a locking assembly located in the mandrel.
In a preferred embodiment of the present invention, the inner side end of the end block cap is provided with an insertion groove, and the mandrel and the end of each convex rib can be inserted into the insertion groove to form a limit; locking assembly includes screw rod and two nuts, and the screw rod is worn to establish in the dabber and its both ends are kept off the cap by two tip and are worn out, and two nuts are connected at the screw rod both ends and can support and lean on the outside terminal surface that keeps off the cap by two tip.
In a preferred embodiment of the invention, the width of the rib in the circumferential direction of the mandrel is gradually reduced from the inside of the mandrel radially outwards.
In a preferred embodiment of the present invention, the mounting groove is a rectangular mounting groove, the magnetic stripe structure mounted in the rectangular mounting groove includes a rectangular protective sleeve with openings at two ends and a plurality of rectangular magnetic stripes penetrating through the rectangular protective sleeve, a blocking piece is disposed between two adjacent rectangular magnetic stripes, and two stop pins are inserted at two ends of the rectangular protective sleeve.
In a preferred embodiment of the invention, a plurality of through holes are arranged on the side surface of the rectangular protective sleeve facing the impurity containing cavity, and the through holes are arranged opposite to the side surfaces of the corresponding rectangular magnetic strips; the side faces, which are opposite to the through holes, of each rectangular magnetic strip are respective N poles; or the side faces, opposite to the through holes, of the rectangular magnetic strips are S poles of the rectangular magnetic strips respectively.
In a preferred embodiment of the invention, the mounting groove is a rectangular mounting groove, the magnetic strip structure mounted in the rectangular mounting groove comprises a rectangular mounting block, a plurality of slots with notches facing the impurity containing cavity are formed in the rectangular mounting block along the length direction of the rectangular mounting block, and a block-shaped magnetic strip is inserted and fixed in each slot; the side surfaces of the block-shaped magnetic strips, which are opposite to the notches, are respectively provided with respective N poles; or the side faces of the block-shaped magnetic stripes, which are opposite to the notches, are respectively S poles.
In a preferred embodiment of the present invention, the installation groove is an isosceles trapezoid installation groove, and an upper bottom of an isosceles trapezoid cross section of the isosceles trapezoid installation groove is disposed toward the impurity receiving chamber; the magnetic stripe structure of installation in the isosceles trapezoid mounting groove includes a plurality of isosceles trapezoid magnetic stripe, all is equipped with a separation blade between two adjacent isosceles trapezoid magnetic stripe.
In a preferred embodiment of the present invention, the upper trapezoidal bottom surfaces of the isosceles trapezoid magnetic stripes in the magnetic stripe structure are N poles, and the lower trapezoidal bottom surfaces are S poles; or the upper trapezoidal bottom surfaces of all isosceles trapezoid magnetic strips in the magnetic strip structure are S poles, and the lower trapezoidal bottom surfaces are N poles; or the two trapezoidal waist side surfaces of each isosceles trapezoid magnetic strip in the magnetic strip structure are respectively the N pole and the S pole.
The invention also provides a strong magnetic performance testing method, which is used for testing the performance of the magnetic stripe structure in the strong magnetic fishing tool, and the strong magnetic performance testing method comprises the following steps:
s1, assembling a mandrel, magnetic stripe structures, two end blocking caps and a locking assembly to form a magnetic testing main body;
s2, placing metal scraps in a temperature control box, and placing a magnetic test main body in the temperature control box;
s3, adjusting the temperature of the temperature control box to a set temperature;
s4, after the magnetic testing main body is placed in the temperature control box for a preset time, the magnetic testing main body is taken out, and the weight of metal fragments adsorbed in each impurity containing cavity is detected.
In a preferred embodiment of the present invention, in step S3, after the temperature of the temperature control box is adjusted, the rotating structure in the temperature control box is opened, and the magnetic testing body is driven to rotate by the rotating structure, so that the magnetic testing body collides with the inner wall of the temperature control box.
In a preferred embodiment of the present invention, the following steps are further included after step S4:
s5, adjusting the shape, and/or material and/or magnetic pole arrangement mode of each magnetic stripe structure, and/or changing the set temperature of the temperature control box; and then repeating the steps S1-S4 to finish the multi-group performance test.
According to the strong magnetic fishing tool, the outer wall of the mandrel is provided with the plurality of ribs arranged at intervals, and impurities can be stored more safely by utilizing the impurity containing cavity formed by the gap between every two adjacent ribs; and utilize this impurity to accomodate the chamber, can increase the flow area in annular space when instrument in-service use, reduce the influence to the fluid flow. The groove is formed in the convex edge to install the magnetic stripe structure, and the magnet is installed on the mandrel in a limiting and locking mode of the end blocking cap and the locking assembly, so that the structure is simple, the fixing mode is reliable, and the magnetic stripe structure is convenient to replace in the using process; in addition, the installation does not require any external bolts, rings, etc. and there is no risk of falling into the well.
The method for testing the strong magnetic performance can be used for carrying out ground test simulation on a strong magnet which is a key part of a drilling-through scraping-milling integrated shaft cleaning pipe column, is simple to operate and has important significance for improving the performance of a strong magnetic fishing tool.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention.
Wherein:
FIG. 1: the structure chart is the structure chart of the mandrel, the magnetic strip structure and the end part blocking cap after the assembly is finished.
FIG. 2: is a cross-sectional view taken along B-B in fig. 1.
FIG. 3: is a cross-sectional view taken along C-C in fig. 1.
FIG. 4: a cross-sectional view of a mandrel provided by the present invention.
FIG. 5 is a schematic view of: a cross-sectional view of an end stop cap is provided for the present invention.
FIG. 6: the invention provides a structure diagram when the magnet structure adopts the first structure when the mounting groove is a rectangular mounting groove.
FIG. 7 is a schematic view of: is a cross-sectional view taken along D-D in fig. 6.
FIG. 8: the sectional view of the magnet structure adopting the second structure when the mounting groove provided by the invention is a rectangular mounting groove.
FIG. 9: the structure diagram of the magnet structure adopting the third structure when the mounting groove is a rectangular mounting groove is provided by the invention.
FIG. 10: is a cross-sectional view taken along E-E in fig. 9.
FIG. 11: is a cross-sectional view of the trapezoidal magnetic stripe provided by the invention.
FIG. 12: is a side view of fig. 11.
FIG. 13 is a schematic view of: is another sectional view of the trapezoidal magnetic strip provided by the invention.
FIG. 14 is a schematic view of: is a cross section of the trapezoidal magnetic stripe provided by the invention.
FIG. 15: base:Sub>A cross-sectional view alongbase:Sub>A-base:Sub>A of the magnetic test body constructed in fig. 1 using the first magnetic pole arrangement.
FIG. 16: base:Sub>A cross-sectional view alongbase:Sub>A-base:Sub>A of the magnetic test body constructed in fig. 1 using the second magnetic pole arrangement.
FIG. 17: base:Sub>A cross-sectional view alongbase:Sub>A-base:Sub>A of the magnetic test body constructed in fig. 1, usingbase:Sub>A third magnetic pole arrangement.
FIG. 18: base:Sub>A cross-sectional view alongbase:Sub>A-base:Sub>A of the magnetic test body constructed in fig. 1 usingbase:Sub>A fourth magnetic pole arrangement.
Wherein N in the drawing represents an N pole, and S represents an S pole.
The reference numbers illustrate:
1. a mandrel; 11. a rib; 12. mounting grooves; 121. a rectangular mounting groove; 122. an isosceles trapezoid mounting groove;
2. a magnetic stripe structure; 21. a rectangular protective sleeve; 211. mounting holes; 212. a through hole; 22. a rectangular magnetic strip; 23. a baffle plate; 24. a retaining pin; 25. an isosceles trapezoid magnetic stripe;
3. an end stop cap; 31. inserting grooves; 32. a central bore;
41. a screw; 42. and a nut.
Detailed Description
In order to more clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings.
Implementation mode one
Referring to fig. 1 to 18, the present embodiment provides a strong magnetic fishing tool, including a mandrel 1, the outer wall of the mandrel 1 is provided with a plurality of ribs 11 at intervals in the circumferential direction, each rib 11 extends from a first end to a second end of the mandrel 1 along the axial direction of the mandrel 1, and a gap between two adjacent ribs 11 forms an impurity receiving cavity. Mounting grooves 12 penetrating through two ends of the convex edge 11 are formed in two side faces of the convex edge 11, and a magnetic stripe structure 2 is embedded in each mounting groove 12; two ends of the mandrel 1 are provided with two end blocking caps 3 which can limit the two ends of the magnetic stripe structure 2, and the two end blocking caps 3 are locked and fixed by a locking assembly positioned in the mandrel 1.
The mandrel 1 is a hollow cylindrical structure with openings at two ends, the ribs 11 are uniformly arranged along the circumferential direction, the length of each rib 11 is the same as that of the mandrel 1, and each rib 11 and the mandrel 1 can be integrally formed. The number of the specific convex ribs 11 can be determined according to the outer diameter of the mandrel 1 and actual needs, and the gap between two adjacent convex ribs 11 provides a impurity containing cavity, so that impurities can be safely stored when the tool rotates at high speed. The shapes of the two mounting grooves 12 on the same convex rib 11 can be the same or different; the specific structures of the two magnetic stripe structures 2 arranged in the two mounting grooves 12 on the same convex rib 11 can be the same or different; the shapes of the mounting grooves 12 on different ribs 11 can be the same or different; the specific structures of the magnetic stripe structures 2 arranged in the mounting grooves 12 on different convex ribs 11 can be the same or different; the magnetic pole placement directions of the magnetic stripe structures 2 can be the same or different; depending on installation and performance requirements. During the equipment, install each magnetic stripe structure 2 in each mounting groove 12 earlier, then keep off cap 3 through two tip at the both ends of dabber 1 and fix each magnetic stripe structure 2, reuse locking Assembly to keep off cap 3 with two tip and lock, can accomplish dabber 1 and each magnetic stripe structure 2's equipment.
Therefore, in the strong magnetic fishing tool in the embodiment, the outer wall of the mandrel 1 is provided with the plurality of ribs 11 which are arranged at intervals, and impurities can be stored more safely by utilizing the impurity containing cavity formed by the gap between every two adjacent ribs 11; and utilize this impurity to accomodate the chamber, can increase the flow area in annular space when instrument in-service use, reduce the influence to the fluid flow. The magnetic stripe structure 2 is installed on the convex edge 11 in a groove mode, and the magnet is installed on the mandrel 1 in a limiting and locking mode through the end blocking cap 3 and the locking assembly, so that the structure is simple, the fixing mode is reliable, and the magnetic stripe structure 2 is convenient to replace in the using process; in addition, the installation does not require any external bolts, rings, etc. and there is no risk of falling into the well.
In a specific implementation manner, referring to fig. 1 and 5, an insertion groove 31 is formed at an inner end of the end blocking cap 3, and the mandrel 1 and the end of each rib 11 can be inserted into the insertion groove 31 to form a limit. The locking assembly comprises a screw rod 41 and two nuts 42, the screw rod 41 penetrates through the mandrel 1, two ends of the screw rod penetrate through the two end blocking caps 3, and the two nuts 42 are connected to two ends of the screw rod 41 and can abut against the outer end faces of the two end blocking caps 3.
The shape of the inserting groove 31 is matched with the end shapes of the mandrel 1 and the convex edges 11, and the inserting groove is limited and fixed in a mutual inserting and meshing mode, so that the inserting groove is simpler and more reliable. The end stop cap 3 may be a circular block structure and is provided with a central hole 32, and the screw 41 may pass through the central hole 32. The diameter of the screw rod 41 is smaller than the inner diameter of the mandrel 1 and the aperture of the central hole 32, and the aperture of the inner hole of the mandrel 1 is determined according to the design size of the actual strong magnetic fishing tool so as to be connected and matched with other parts in the tool. After each magnetic stripe structure 2 is installed, the two ends of the magnetic stripe structure 2 are fixed through the end blocking caps 3, and then the magnetic stripe structure is locked through the screw rods 41 and the nuts 42, so that the magnetic stripe structure is more convenient to assemble and disassemble.
Preferably, referring to fig. 4, the width of the rib 11 along the circumferential direction of the mandrel 1 is gradually reduced from the inner part of the mandrel 1 to the outer part in the radial direction, so that the volume of the impurity containing cavity can be increased, the impurity can be contained more conveniently, and the flow area is increased.
Further, the shape of the mounting groove 12 matches with the shape of the magnetic stripe structure 2, the shape of the mounting groove 12 can be selected as required, and in consideration of convenience of mounting, it is more preferable that the cross-sectional shape of the mounting groove 12 along the axial direction of the mandrel 1 is rectangular or isosceles trapezoid in this embodiment.
Specifically, in some embodiments, when the mounting groove 12 is a rectangular mounting groove 121, referring to fig. 1, 2 and 6 to 10, the magnetic stripe structure 2 mounted in the rectangular mounting groove 121 includes a rectangular protective sleeve 21 with two open ends and a plurality of rectangular magnetic stripes 22 penetrating through the rectangular protective sleeve 21, a blocking piece 23 is disposed between two adjacent rectangular magnetic stripes 22, and two stop pins 24 are inserted at two ends of the rectangular protective sleeve 21.
The shape of the blocking piece 23 can be, for example, a cylindrical shape as shown in fig. 7, or can be other shapes, and the blocking piece 23 is a non-magnetic structure to separate two adjacent rectangular magnetic strips 22. In actual use, the rectangular magnetic strips 22 in the magnetic strip structure 2 are identical in specification, preferably adopt standard specification, and then the size and the number of the blocking pieces 23 are determined according to the designed length of the mandrel 1 and the length of the rectangular magnetic strips 22. The rectangular protective sleeve 21 has corresponding mounting holes 211 formed on the lateral surfaces of both ends for inserting the stop pin 24. After each rectangular magnetic stripe 22 and each separation blade 23 are installed, each rectangular magnetic stripe 22 and each separation blade 23 are closely arranged along the axial direction of the rectangular protective sleeve 21 in a staggered mode, and the two ends of the rectangular protective sleeve are fixed through inserting the stop pins 24, so that the installation is simple and convenient.
When the mounting groove 12 is a rectangular mounting groove 121 and the magnetic stripe structure 2 is composed of a rectangular protective sleeve 21, a rectangular magnetic stripe 22, a blocking piece 23 and a stop pin 24, the magnetic stripe structure 2 has three structural forms as follows:
the first method comprises the following steps: referring to fig. 6 and 7, a plurality of through holes 212 are formed in the side surface of the rectangular protective sleeve 21 facing the impurity receiving cavity, the through holes 212 are disposed opposite to the side surfaces of the corresponding rectangular magnetic strips 22, and the side surfaces of the rectangular magnetic strips 22 opposite to the through holes 212 are the respective S poles. That is, in addition to the holes formed in the side walls of the rectangular protective sheath 21 at the positions where the stopper pins 24 are installed, holes are formed in the side walls of the rectangular magnetic strips 22 near the S-pole of the rectangular magnetic strips 22 at positions corresponding to each rectangular magnetic strip 22. According to the orientation of fig. 7, the mounting hole 211 and the through hole 212 are both facing upward, and the N-pole of the rectangular magnetic stripe 22 is facing downward.
And the second method comprises the following steps: referring to fig. 8, a plurality of through holes 212 are opened on the side of the rectangular protective sleeve 21 facing the impurity receiving cavity, the through holes 212 are disposed opposite to the sides of the corresponding rectangular magnetic strips 22, and the sides of the rectangular magnetic strips 22 opposite to the through holes 212 are N poles respectively. That is, in addition to the holes on the side walls of the rectangular protective sheath 21 at the positions where the retaining pins 24 are installed, holes are also formed on the side walls near the N-pole of the rectangular magnetic strips 22 at positions corresponding to each rectangular magnetic strip 22. In the orientation of FIG. 8, the mounting holes 211, through holes 212, and the N pole of the rectangular magnetic strip 22 are all facing upward.
In the first and second structures, the number of the through holes 212 is the same as that of the rectangular magnetic strips 22, and the shape of the through holes 212 may be circular holes as shown in fig. 6, or may be other shapes.
And the third is that: referring to fig. 9 and 10, the circumferential wall of the rectangular protective sleeve 21 is a closed surface corresponding to the position of the rectangular magnetic stripe 22. That is, the sidewall of the rectangular protective sleeve 21 is not perforated at any other position than the position where the retaining pin 24 is installed. In this way, the side of the rectangular protective sleeve 21 with the mounting hole 211 is the side facing the N pole of the rectangular magnetic stripe 22. In the orientation of FIG. 10, the mounting holes 211 and the N pole of the rectangular magnetic strip 22 are facing upward. This makes it easier to clean the adsorbed metal debris.
In other embodiments, when the mounting slot 12 is a rectangular mounting slot 121, the magnetic stripe structure 2 can also adopt the following structure: the magnetic stripe structure 2 of installation in rectangle mounting groove 121 includes rectangle installation piece, offers the notch along its length direction on rectangle installation piece and accomodates a plurality of slots in chamber towards impurity, all inserts in every slot and establishes and be fixed with cubic magnetic stripe. The following two specific structures are provided in this way:
and fourthly: the side surfaces of the block-shaped magnetic strips, which are opposite to the notches, are respective N poles.
And a fifth mode: the side faces of the block-shaped magnetic stripes, which are opposite to the notches, are S poles respectively.
Wherein, the shape of cubic magnetic stripe should cooperate with the shape of slot, for example, when the slot adopted cylindrical groove, cubic magnetic stripe was the cylinder magnetic stripe. The block-shaped magnetic strip can be fixed in an interference fit mode with the slot, and can also be fixed in a mode of being connected through a fastener, and the block-shaped magnetic strip is specifically determined according to the requirement.
When the installation groove 12 is the isosceles trapezoid installation groove 122, referring to fig. 1, 3 and 11 to 14, the installation groove 12 is the isosceles trapezoid installation groove 122, and an upper bottom of an isosceles trapezoid cross section of the isosceles trapezoid installation groove 122 is disposed toward the impurity receiving cavity; the magnetic stripe structure 2 of installation in isosceles trapezoid mounting groove 122 includes a plurality of isosceles trapezoid magnetic stripe 25, all is equipped with a separation blade 23 between two adjacent isosceles trapezoid magnetic stripe 25.
The shape of the blocking piece 23 can be, for example, an isosceles trapezoid block, or can be other shapes, and the blocking piece 23 is of a non-magnetic structure so as to separate two adjacent isosceles trapezoid magnetic strips 25. In actual use, the isosceles trapezoid magnetic strips 25 in the magnetic strip structure 2 are the same in specification, preferably adopt standard specifications, and then determine the size and the number of the baffle sheets 23 according to the design length of the mandrel 1 and the length of the isosceles trapezoid magnetic strips 25; and a blocking piece 23 can be additionally arranged on the outer side of the isosceles trapezoid magnetic strip 25 at the outermost side as required. After each isosceles trapezoid magnetic stripe 25 and each separation blade 23 have been installed, each rectangle magnetic stripe 22 and each separation blade 23 closely arrange along the crisscross axial of rectangle protective sheath 21, because the upper base in isosceles trapezoid mounting groove 122's notch corresponds the isosceles trapezoid cross-section, for the slot end, can play limiting displacement to internally mounted's isosceles trapezoid magnetic stripe 25 and separation blade 23, can not set up the protective sheath under this mode, utilize at both ends that tip fender cap 3 is spacing fixed can, the installation is simple and convenient.
When the installation groove 12 is the isosceles trapezoid installation groove 122, the magnet structure has three structural forms:
the first method comprises the following steps: referring to fig. 11 and 12, the upper trapezoidal bottom surfaces and the lower trapezoidal bottom surfaces of the isosceles trapezoidal magnetic strips 25 in the magnetic strip structure 2 are both N poles and S poles, respectively. That is, according to the orientation shown in fig. 11, the magnetization direction of the isosceles trapezoid magnetic stripe 25 is up and down, and the N pole is located at one end close to the isosceles trapezoid narrow surface and the S pole is located at one end close to the isosceles trapezoid wide surface.
And the second method comprises the following steps: referring to fig. 13, the upper trapezoidal bottom surfaces of the isosceles trapezoidal magnetic strips in the magnetic strip structure 2 are the respective S poles, and the lower trapezoidal bottom surfaces are the respective N poles. That is, according to the orientation shown in fig. 13, the magnetization direction of the isosceles trapezoid magnetic stripe 25 is up and down, and the S pole is located at one end close to the isosceles trapezoid narrow face and the N pole is located at one end close to the isosceles trapezoid wide face.
And the third is that: referring to fig. 14, two isosceles trapezoid waist sides of each isosceles trapezoid magnetic stripe in the magnetic stripe structure 2 are respectively an N pole and an S pole. That is, according to the orientation shown in fig. 14, the magnetization direction of the isosceles trapezoid magnetic stripe 25 is left-right magnetization, and the N pole is located at one end close to the left side of the isosceles trapezoid, and the S pole is located at one end close to the right side of the isosceles trapezoid.
In practical application, the plurality of mounting grooves 12 on the plurality of protruding ribs 11 of the whole mandrel 1 may all adopt rectangular mounting grooves 121, may also all adopt isosceles trapezoid mounting grooves 122, may also partially adopt rectangular mounting grooves 121, and partially adopt trapezoid mounting grooves 12, and the magnetic stripe structure 2 mounted in the rectangular mounting groove 121 may adopt any one of the five manners, and the magnetic stripe structure 2 mounted in the isosceles trapezoid mounting groove 122 may adopt any one of the three manners; the specific shape of each mounting groove 12 and the specific structural form of the magnetic stripe structure 2 can be determined according to the mounting requirements and the performance requirements that can be achieved, and various different combination modes can be detected through related performance tests to determine the optimal mode.
Second embodiment
The embodiment provides a method for testing the performance of a magnetic stripe structure 2 in a ferromagnetic fishing tool according to the first embodiment, and the method for testing the performance of the ferromagnetic fishing tool comprises the following steps:
s1, assembling a mandrel 1, magnetic strip structures 2, two end blocking caps 3 and a locking assembly to form a magnetic testing main body;
s2, placing metal scraps in a temperature control box, and placing a magnetic test main body in the temperature control box;
s3, adjusting the temperature of the temperature control box to a set temperature;
s4, after the magnetic testing main body is placed in the temperature control box for preset time, the magnetic testing main body is taken out, and the weight of metal fragments adsorbed in each impurity containing cavity is detected.
When the above test is performed, the size of the core shaft 1 in the magnetic test body may be in accordance with the actual tool size. The heating of the temperature control box can be realized by resistance wires, and other modes can also be adopted. In step S4, the method of detecting the weight of the adsorbed metal debris may be to peel off the metal debris adsorbed in the impurity receiving cavity, and then weigh the metal debris, or may adopt other methods; and after each weight is detected, comparative analysis is carried out, and according to the weight of the metal scraps adsorbed in each impurity containing cavity, the adsorption capacity of the two magnetic stripe structures 2 on the two sides of the impurity containing cavity to the metal scraps can be judged, the temperature resistance of the magnetic stripes at the set temperature can be judged, and the magnetic field strength under the condition can be judged.
In some embodiments, because the magnetic pole mode of arranging of different temperature, different magnetic stripe material, different magnetic stripe shape and 2 differences of each magnetic stripe structure all can influence the performance of magnetic stripe, what finally embody can influence each impurity and accomodate intracavity absorption metal iron fillings's adsorption performance. In order to facilitate the testing of the optimal combination mode of the magnetic stripe structure 2, the following steps are also included after the step S4:
s5, adjusting the shape, and/or material, and/or magnetic pole arrangement mode of each magnetic stripe structure 2, and/or changing the set temperature of the temperature control box; and then repeating the steps S1-S4 to finish the multi-group performance test.
Thus, after a plurality of groups of performance tests are carried out, the optimal combination mode of the shape, the material and the magnetic pole arrangement mode of each magnetic stripe structure 2 can be obtained by comparing and analyzing the weight of the metal scraps adsorbed in each impurity containing cavity in the plurality of groups of performance tests; the use limit and the characteristics of the magnetic strips made of different materials in different temperature environments can be determined according to the analysis result; the influence of different conditions on the magnetic field intensity can be determined according to the analysis result, and the magnetic failure condition of the magnetic strip under different temperature environments can be determined according to the analysis result.
When a plurality of groups of performance tests are carried out, the shape, and/or material, and/or magnetic pole arrangement mode of each magnetic stripe structure 2 are adjusted, and/or the set temperature of the temperature control box is changed, and the adjustable parameters can be combined randomly according to needs to carry out more groups of comparison tests, and more accurate and more optimal combination modes are compared.
The optimum combination method described here does not mean a method in which the amount of metal chips adsorbed in the impurity storage chamber is the largest, but the optimum combination method needs to be comprehensively determined by comprehensively considering the amount of metal chips adsorbed in the impurity storage chamber, the flow area size after the metal chips are adsorbed in the impurity storage chamber, and the assembly and installation method. In practice, one or two optimal modes are selected according to multiple sets of performance tests and used in actual fishing tools.
In other embodiments, because the fishing tool is rotated in actual conditions, collision can occur between the fishing tool and the wall of the casing pipe, and the magnetic property of the magnetic strip broken by collision can be reduced due to the fragility of the magnetic strip. In order to facilitate the test of the magnetic conditions under different conditions when the magnetic stripes are likely to be broken due to collision, in step S3, after the temperature of the temperature control box is adjusted, the rotating structure in the temperature control box is opened, and the rotating structure is utilized to drive the magnetic test main body to rotate, so that the magnetic test main body collides with the inner wall of the temperature control box.
The following steps are also included after step S4:
s5, adjusting the shape, and/or material and/or magnetic pole arrangement mode of each magnetic stripe structure 2, and/or changing the set temperature of the temperature control box; and then repeating the steps S1-S4 to finish the multi-group performance test.
Like this, carry out multiunit capability test after, through carrying out comparative analysis to each impurity in the multiunit capability test and accomodate intracavity absorption metal piece's weight, alright obtain the magnetism inefficacy condition of magnetic stripe under the different conditions.
When a plurality of groups of performance tests are carried out, the shape, and/or the material and/or the magnetic pole arrangement mode of each magnetic stripe structure 2 are/is adjusted, and/or the set temperature of the temperature control box is changed, and the adjustable parameters can be combined randomly according to the requirements. This temperature control box is cylindric structure, and its material can be the same with actual sleeve pipe to it has the real condition of collision to simulate fishing tool in the pit to rotate the limit in the limit with the sleeve pipe better. The specific rotating structure can adopt any existing mode as long as the magnetic test main body can be conveniently driven to rotate. During the test, the axial direction of the magnetic test main body can be horizontal or vertical, which is determined according to the actual device arrangement, but the invention is not limited thereto.
Further, the above-described test method is exemplified below by a specific example.
Referring to figures 1 to 18, in this example the mandrel 1 is provided with a total of four ribs 11 around its periphery depending on the size of mandrel 1 used. In consideration of convenience of installation and convenience of testing, four mounting grooves 12 on two adjacent convex ridges 11 of the four convex ridges 11 all adopt rectangular mounting grooves 121, and four mounting grooves 12 on two adjacent convex ridges 11 all adopt isosceles trapezoid mounting grooves 122. Like this, among the four impurity storage chambers that form, what one of them impurity storage chamber both sides were corresponding is rectangle mounting groove 121 and rectangle mounting groove 121, what another impurity storage chamber both sides were corresponding is isosceles trapezoid mounting groove 122 and isosceles trapezoid mounting groove 122, and what two other impurity storage chamber both sides were corresponding is rectangle mounting groove 121 and isosceles trapezoid mounting groove 122. By installing any one of the five structures mentioned in the first embodiment in the rectangular installation groove 121 and installing any one of the three structures mentioned in the first embodiment in the isosceles trapezoid installation groove 122, more combinations of magnetic strips can be installed by using the same spindle 1, and more sets of test tests can be performed, and multiple situations can be tested in each set of test.
Specifically, in this example, after the whole magnetic test body is installed, there may be four magnetic pole arrangements as follows:
the first method comprises the following steps: referring to fig. 15, in this embodiment, the second structure is installed in each rectangular installation groove 121, and the first structure is installed in each isosceles trapezoid installation groove 122; after the installation is finished, the magnetism of two adjacent magnetic stripe structures 2 is in a repulsive state.
And the second method comprises the following steps: referring to fig. 16, in this way, the first structure and the second structure are respectively installed in two rectangular installation grooves 121 on the same protruding rib 11, and the first structure and the second structure are respectively installed in two isosceles trapezoid installation grooves 122 on the same protruding rib 11, and the specific distribution is as shown in fig. 16, so that after the installation is completed, the magnetism of two adjacent magnetic stripe structures 2 is in an attraction state.
And the third is that: referring to fig. 17, in this embodiment, the third structure is installed in each rectangular installation groove 121, the third structure is installed in each isosceles trapezoid installation groove 122, and after the installation is completed, the magnetic properties of the two adjacent rectangular magnetic stripe structures 2 are in a repulsive state, and the N pole of each trapezoidal magnetic stripe structure 2 faces the center of the mandrel 1.
And a fourth step of: referring to fig. 18, in this embodiment, the third structure is installed in each rectangular installation groove 121, the third structure is installed in each isosceles trapezoid installation groove 122, and after the installation, the magnetic properties of the two adjacent rectangular magnetic stripe structures 2 are in an attraction state, and the N pole of each trapezoidal magnetic stripe structure 2 faces the center of the mandrel 1.
When testing, firstly selecting a magnetic strip made of one material by adopting a first mode of a magnetic testing main body, and completing a group of performance tests according to the steps S1-S4; step S5, adjusting the set temperature of the temperature control box and the material of the magnetic strip by adopting the second mode to the fourth mode for the magnetic test main body, and carrying out other multi-group performance tests; finally, according to the multiple groups of performance tests, the optimal magnetic stripe structure 2 and the optimal magnetic pole arrangement mode can be optimized, and the adsorption condition, the failure condition and the like of the magnets made of different materials at different temperatures can be determined.
Of course, the examples are only examples, and how to combine the magnetic test main body according to needs in actual test can be added with a rotation function to perform more tests.
By utilizing the method for testing the strong magnetic performance, ground test simulation can be performed on a strong magnet which is a key part of a drilling-through scraping-milling integrated shaft cleaning pipe column, and the method is simple to operate and has important significance for improving the performance of a strong magnetic fishing tool.
The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention should fall within the protection scope of the invention.
Claims (11)
1. A strong magnetic fishing tool is characterized by comprising a mandrel, wherein a plurality of ribs are arranged on the outer wall of the mandrel at intervals in the circumferential direction, each rib extends from a first end to a second end of the mandrel along the axial direction of the mandrel, and a gap between every two adjacent ribs forms an impurity containing cavity;
mounting grooves penetrating through two ends of the convex edge are formed in the two side faces of the convex edge, and a magnetic strip structure is embedded in each mounting groove; the two ends of the core shaft are provided with two end part blocking caps which can limit the two ends of the magnetic stripe structure, and the two end part blocking caps are locked and fixed through a locking assembly positioned in the core shaft.
2. A strong magnetic fishing tool as claimed in claim 1,
the inner side end of the end part blocking cap is provided with an inserting groove, and the mandrel and the end part of each convex edge can be inserted into the inserting groove to form limiting;
the locking assembly comprises a screw and two nuts, the screw penetrates through the core shaft, the two ends of the screw are penetrated out of the end blocking cap, and the two nuts are connected to the two ends of the screw and can abut against the two outer end faces of the end blocking cap.
3. A strong magnetic fishing tool as recited in claim 1,
the width of the convex ridge along the circumferential direction of the mandrel is gradually reduced from the inner part of the mandrel to the outer part in the radial direction.
4. A strong magnetic fishing tool as claimed in claim 1,
the mounting groove is a rectangular mounting groove, the magnetic stripe structure installed in the rectangular mounting groove comprises rectangular protective sleeves with openings at two ends and a plurality of rectangular magnetic stripes penetrating through the rectangular protective sleeves, a blocking piece is arranged between every two adjacent rectangular magnetic stripes, and two stop pins are inserted at two ends of each rectangular protective sleeve.
5. A strong magnetic fishing tool as claimed in claim 4,
a plurality of through holes are formed in the rectangular protective sleeve on the side surface facing the impurity containing cavity, and the through holes are arranged over against the side surface of the corresponding rectangular magnetic strip;
the side faces, which are opposite to the through holes, of the rectangular magnetic strips are respectively provided with respective N poles; or the side faces, facing the through holes, of the rectangular magnetic strips are S poles of the rectangular magnetic strips respectively.
6. A strong magnetic fishing tool as claimed in claim 1,
the mounting groove is a rectangular mounting groove, the magnetic stripe structure mounted in the rectangular mounting groove comprises a rectangular mounting block, a plurality of slots with notches facing the impurity containing cavity are formed in the rectangular mounting block along the length direction of the rectangular mounting block, and a block-shaped magnetic stripe is inserted and fixed in each slot;
the side faces, which are opposite to the notches, of each block-shaped magnetic strip are respectively provided with respective N poles; or the side faces, which are opposite to the notches, of each block-shaped magnetic strip are respectively S poles.
7. A strong magnetic fishing tool as recited in claim 1,
the mounting groove is an isosceles trapezoid mounting groove, and the upper bottom of the isosceles trapezoid cross section of the isosceles trapezoid mounting groove is arranged towards the impurity containing cavity; the magnetic stripe structure of installation in the isosceles trapezoid mounting groove includes a plurality of isosceles trapezoid magnetic stripe, adjacent two all be equipped with a separation blade between the isosceles trapezoid magnetic stripe.
8. A strong magnetic fishing tool as recited in claim 7,
the upper trapezoidal bottom surfaces of the isosceles trapezoid magnetic strips in the magnetic strip structure are respectively N poles, and the lower trapezoidal bottom surfaces are respectively S poles; or
The upper trapezoidal bottom surface of each isosceles trapezoid magnetic stripe in the magnetic stripe structure is an S pole, and the lower trapezoidal bottom surface is an N pole; or alternatively
The two trapezoidal waist side surfaces of each isosceles trapezoid magnetic stripe in the magnetic stripe structure are respectively an N pole and an S pole.
9. A method for testing the performance of a magnetic stripe structure in a strong magnetic fishing tool as claimed in any one of claims 1 to 8, the method comprising the steps of:
s1, assembling the mandrel, the magnetic stripe structures, the two end blocking caps and the locking assembly to form a magnetic testing main body;
s2, placing metal scraps in a temperature control box, and placing the magnetic test main body in the temperature control box;
s3, adjusting the temperature of the temperature control box to a set temperature;
and S4, after the magnetic test main body is placed in the temperature control box for a preset time, taking out the magnetic test main body, and detecting the weight of the metal fragments adsorbed in each impurity containing cavity.
10. The method of testing strong magnetic properties according to claim 9,
in step S3, after the temperature of the temperature control box is adjusted, the rotating structure in the temperature control box is opened, and the rotating structure is utilized to drive the magnetic test main body to rotate, so that the magnetic test main body collides with the inner wall of the temperature control box.
11. A strong magnetic property test method as set forth in claim 9 or 10,
the following steps are also included after step S4:
s5, adjusting the shape, and/or material and/or magnetic pole arrangement mode of each magnetic stripe structure, and/or changing the set temperature of the temperature control box; and then repeating the steps S1-S4 to finish the multi-group performance test.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856985.2A CN115370314B (en) | 2022-07-20 | 2022-07-20 | Strong magnetic fishing tool and strong magnetic property testing method |
| PCT/CN2022/137836 WO2024016567A1 (en) | 2022-07-20 | 2022-12-09 | Strong magnetic salvaging tool and strong magnetic performance testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856985.2A CN115370314B (en) | 2022-07-20 | 2022-07-20 | Strong magnetic fishing tool and strong magnetic property testing method |
Publications (2)
| Publication Number | Publication Date |
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| CN115370314A true CN115370314A (en) | 2022-11-22 |
| CN115370314B CN115370314B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210856985.2A Active CN115370314B (en) | 2022-07-20 | 2022-07-20 | Strong magnetic fishing tool and strong magnetic property testing method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115370314B (en) |
| WO (1) | WO2024016567A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024016567A1 (en) * | 2022-07-20 | 2024-01-25 | 中国石油天然气股份有限公司 | Strong magnetic salvaging tool and strong magnetic performance testing method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118584942B (en) * | 2024-07-31 | 2024-10-18 | 淄博矽微电子科技有限公司 | Single-phase power controller factory performance testing device and automatic assembly and disassembly assembly |
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|---|---|
| CN115370314B (en) | 2024-05-03 |
| WO2024016567A1 (en) | 2024-01-25 |
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