CN219840609U - Strong electromagnetic fisher for well drilling - Google Patents

Abstract

The utility model provides a strong electromagnetic fisher for drilling, which comprises: the protective shell is provided with a central hole, and the front end of the protective shell is provided with a drilling piece; the electromagnetic assembly is provided with a magnetic attraction surface facing the front end of the protective shell, the electromagnetic assembly is used for attracting ferromagnetic objects, at least one part of the electromagnetic assembly is arranged in the central hole, and the outer peripheral surface of the electromagnetic assembly is arranged at intervals with the inner hole wall of the central hole of the protective shell, so that a through-flow channel penetrating along the axial direction of the central hole is formed between the electromagnetic assembly and the protective shell, and the through-flow channel is used for flowing punching liquid. The utility model solves the problem of low salvaging efficiency of the strong electromagnetic salvaging device for well drilling in the prior art.

Description

Strong electromagnetic fisher for well drilling

Technical Field

The utility model relates to the technical field of drilling engineering, in particular to a strong electromagnetic fisher for drilling.

Background

When petroleum or coal mine geological drilling is carried out, ferromagnetic parts such as bit cones, slip teeth, clamp teeth, steel balls, small tools, drilling tool fragments and the like often appear in a drilled hole, so that the accident in the drilled hole is caused. The existing strong magnetic fisher using the permanent magnet can disappear or weaken the magnetic force of the magnet after being placed for a period of time, and even if the falling objects in the holes are sucked during salvaging, the existing strong magnetic fisher can fall off in the half-air, and the ferromagnetic falling objects can not be salvaged from the holes, so that the existing strong magnetic fisher needs to be magnetized regularly if being used normally, and has higher cost. In addition, the existing strong magnetic fisher is a non-conductive fisher, mud circulation cannot be established in the salvaging process, the magnet end of the strong magnetic fisher is protected by a magnetic isolation sleeve, no alloy exists outside the magnetic isolation sleeve, when the drill bit is in resistance, the fishing tool can only be started to replace the drill bit to sweep the hole, and the effect is low.

That is, the strong electromagnetic fisher for drilling in the prior art has the problem of low salvaging efficiency.

Disclosure of Invention

The utility model mainly aims to provide a strong electromagnetic fisher for drilling so as to solve the problem of low salvaging efficiency of the strong electromagnetic fisher for drilling in the prior art.

In order to achieve the above object, the present utility model provides a strong electromagnetic fisher for drilling, comprising: the protective shell is provided with a central hole, and the front end of the protective shell is provided with a drilling piece; the electromagnetic assembly is provided with a magnetic attraction surface facing the front end of the protective shell, the electromagnetic assembly is used for attracting ferromagnetic objects, at least one part of the electromagnetic assembly is arranged in the central hole, and the outer peripheral surface of the electromagnetic assembly is arranged at intervals with the inner hole wall of the central hole of the protective shell, so that a through-flow channel penetrating along the axial direction of the central hole is formed between the electromagnetic assembly and the protective shell, and the through-flow channel is used for flowing punching liquid.

Further, the electromagnetic assembly includes: the magnetic attraction piece is provided with a magnetic attraction surface; the magnetizing coil is sleeved outside the magnetic attraction piece; one end of the power supply is connected with one side of the magnetic attraction piece away from the magnetic attraction surface, and the magnetizing coil is electrically connected with the power supply.

Further, the strong electromagnetic fisher for well drilling further comprises a connecting component, at least one part of the connecting component is connected with the protective shell, at least another part of the connecting component is connected with the electromagnetic component, the connecting component is provided with an opening which is penetrated along the axial direction of the central hole, and the opening is communicated with the flow passage.

Further, the connecting assembly comprises a locking piece, the locking piece is connected with one end, far away from the magnetic attraction piece, of the power supply, the outer circumferential surface of the locking piece is connected with the inner hole wall of the central hole of the protective shell, and the locking piece is provided with an opening.

Further, the inner hole wall of the central hole of the protective shell is provided with connecting threads, and the outer circumferential surface of the locking piece is connected with the connecting threads.

Further, the trompil is a plurality of, and a plurality of trompils set up along the circumference interval of retaining member.

Further, the power supply comprises a lithium battery barrel, one end of the lithium battery barrel, which is far away from the magnetic attraction piece, is provided with an extended fixed shaft, and the center of the locking piece is provided with a positioning hole for fixing the fixed shaft.

Further, the electromagnetic assembly further comprises a coil sheath, the coil sheath is provided with a main body and a sealing sleeve, the main body is arranged on one side, away from the magnetic attraction surface, of the magnetic attraction piece, and the sealing sleeve extends from the main body to one side, where the magnetic attraction surface is located, of the magnetic attraction piece and is sleeved outside the magnetizing coil, so that the magnetizing coil is sealed inside the sealing sleeve.

Further, the outer periphery side of the main body part is connected with the inner hole wall of the central hole of the protective casing, and the main body part is provided with an avoidance hole which is communicated with the flow passage along the axial direction of the central hole.

Further, the magnetic attraction member includes: the magnetizing coil is sleeved on the outer peripheral side of the magnetizing body, one end of the magnetizing body, which is far away from the power supply, is provided with a circumferential flange, one side of the circumferential flange, which faces the power supply, is in sealing connection with one end of the coil sheath, and the end face of the magnetizing body, which is far away from the power supply, is a magnetic attraction surface; the connecting cylinder is arranged at one end of the magnetizing body, which is far away from the magnetic attraction surface, and extends towards the power supply, a limiting hole for the connecting cylinder to pass through is formed in the center of the main body part, and the hole wall of the limiting hole is connected with the outer peripheral surface of the connecting cylinder in a sealing manner; and/or the end face of the main body part facing the magnetic attraction surface is in sealing connection with the end face of the magnetizing body facing the power supply.

Further, one end of the connecting column body far away from the charging body is provided with a connecting port connected with a power supply.

Further, the inner hole wall of the central hole of the protective casing is provided with a clamping protrusion, and the end face of one side of the main body part away from the power supply is clamped and limited with the clamping protrusion.

Further, the outer peripheral surface of the front end of the protective housing is provided with a reduced diameter section, and the drilling member is arranged on the inclined surface of the reduced diameter section.

Further, the magnetic attraction surface is flush with the front end of the protective shell; or the magnetic attraction surface extends out of the protective shell.

By applying the technical scheme of the utility model, the strong electromagnetic fisher for drilling comprises a protective shell and an electromagnetic assembly, wherein the protective shell is provided with a central hole, and the front end of the protective shell is provided with a drilling part; the electromagnetic assembly is provided with a magnetic attraction surface facing the front end of the protective shell, the electromagnetic assembly is used for attracting ferromagnetic falling objects, at least one part of the electromagnetic assembly is arranged in the central hole, and the outer peripheral surface of the electromagnetic assembly is arranged at intervals with the inner hole wall of the central hole of the protective shell so as to form a through-flow channel which is communicated with the protective shell along the axial direction of the central hole between the electromagnetic assembly and the protective shell, and the through-flow channel is used for flowing punching liquid.

Through setting up electromagnetic assembly attraction ferromagnetism junk, can charge along with the use, not have the problem of long-term use loss of magnetism or degaussing, improved the suction to the junk, guaranteed salvage efficiency, still increased the life of well drilling with strong electromagnetism fisher. The front end of the protective casing is provided with the drilling part, so that the hole sweeping and the drilling can be performed when the diameter of the drilled hole is reduced and the blockage is met, and the drilling is ensured to be smoothly extended into the drilled hole by the strong electromagnetic fisher. Through setting up the passageway that flows through, can conveniently establish the punching liquid circulation punching a hole of fishing in-process of boring to make the drilling slag that drilling piece bore down follow the punching liquid in time and discharge, guarantee that the drilling can be unobstructed with strong electromagnetism fisher and bore down, guarantee salvage efficiency.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic structural diagram of a strong electromagnetic fisher for drilling according to a first embodiment of the present utility model;

fig. 2 shows a schematic structural view of the protective housing of fig. 1;

FIG. 3 shows a schematic diagram of the connection assembly and power supply of FIG. 1;

fig. 4 shows a schematic structural view of the coil sheath of fig. 1;

fig. 5 shows a schematic structural diagram of the magnetizing coil in fig. 1;

FIG. 6 shows a schematic structural view of the magnetic attraction member in FIG. 1;

FIG. 7 shows a top view of the retaining member of FIG. 1;

fig. 8 shows a top view of the coil sheath of fig. 1;

FIG. 9 shows a schematic perspective view of the magnetic attraction member of FIG. 1;

fig. 10 shows a schematic perspective view of the coil sheath of fig. 1.

Wherein the above figures include the following reference numerals:

10. a protective housing; 11. a drilling member; 12. a connecting thread; 13. the clamping bulge; 14. a reducing section; 15. a clamping groove; 20. an electromagnetic assembly; 21. a magnetic attraction surface; 22. a magnetic attraction piece; 221. charging a magnet; 222. a connecting column; 2221. a connection port; 223. a circumferential flange; 23. magnetizing coils; 24. a power supply; 241. a fixed shaft; 25. a coil sheath; 251. a main body portion; 252. sealing sleeve; 253. avoidance holes; 26. a seal; 30. a flow-through channel; 40. a connection assembly; 41. opening holes; 42. a locking member; 421. and positioning holes.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.

The utility model provides a strong electromagnetic fisher for well drilling, which aims to solve the problem of low salvaging efficiency of the strong electromagnetic fisher for well drilling in the prior art.

As shown in fig. 1 to 10, the strong electromagnetic fisher for well drilling comprises a protective housing 10 and an electromagnetic assembly 20, wherein the protective housing 10 is provided with a central hole, and the front end of the protective housing 10 is provided with a drilling piece 11; the electromagnetic assembly 20 has a magnetic attraction surface 21 facing the front end of the protective housing 10, the electromagnetic assembly 20 is used for attracting ferromagnetic objects, at least a part of the electromagnetic assembly 20 is arranged in the central hole, the outer peripheral surface of the electromagnetic assembly 20 is arranged at intervals with the inner hole wall of the central hole of the protective housing 10 so as to form a through-flow channel 30 which penetrates along the axial direction of the central hole between the two, and the through-flow channel 30 is used for flowing punching liquid.

Through setting up electromagnetic assembly 20 attraction ferromagnetism junk, can charge along with the time, there is not the problem of long-term use loss of magnetism or degaussing, improved the suction to the junk, guaranteed salvage efficiency, still increased the life of well drilling with strong electromagnetic salvage ware. The drilling part 11 is arranged at the front end of the protective casing 10, so that the hole sweeping and the drilling can be performed when the diameter of the drilled hole is reduced and the blockage is met, and the drilling strong electromagnetic fisher is ensured to smoothly extend into the drilled hole. Through setting up the passageway 30 that overflows, can conveniently establish the punching liquid circulation in the salvaging process of boring down and punch a hole to make the drilling slag that drilling piece 11 bore down follow the punching liquid in time and discharge, guarantee that the drilling can be unobstructed with strong electromagnetism fisher and bore down, guarantee salvage efficiency.

Preferably, the punching fluid is a slurry, and a slurry circulation is established to expel the drilling mud from the borehole following the slurry. When the strong electromagnetic fisher for drilling is put into a drilled hole, if Kong Nasu diameter is blocked, the mud circulation can be established by using the flow passage 30 and the drilling part 11 to sweep the hole and drill down, so that the problems of reducing accident handling efficiency and wasting time caused by replacing a drill bit to sweep the hole are avoided, and the subsequent normal drilling operation is ensured.

The flow path of the punching liquid in the flow passage 30 is shown by an arrow in fig. 1.

Example 1

As shown in fig. 1 to 10, the electromagnetic assembly 20 includes a magnetic attraction member 22, a magnetizing coil 23, and a power supply 24, the magnetic attraction member 22 having a magnetic attraction surface 21; the magnetizing coil 23 is sleeved outside the magnetic attraction piece 22; one end of the power supply 24 is connected to a side of the magnetic attraction piece 22 away from the magnetic attraction face 21, and the magnetizing coil 23 is electrically connected to the power supply 24. The magnetizing coil 23 is output with current through the power supply 24, the magnetizing coil 23 is sleeved outside the magnetic attraction piece 22, the magnetic attraction piece 22 can be magnetized by the magnetic field of the electrified magnetizing coil 23 under the electromagnetic induction principle, the magnetic attraction piece 22 is equivalent to a strong magnet in the fishing process to attract ferromagnetic junk, and the junk is fished out from a drill hole when the strong electromagnetic fisher for well drilling is slowly lifted.

Preferably, the magnetic attraction piece 22 is an iron core, so that the magnetizing coil 23 magnetizes the iron core to ensure the attraction effect of the magnetic attraction piece 22 on the ferromagnetic objects.

As shown in fig. 3, the strong electromagnetic fisher for well drilling further includes a connection assembly 40, at least a part of the connection assembly 40 is connected with the protective housing 10, at least another part of the connection assembly 40 is connected with the electromagnetic assembly 20, the connection assembly 40 has an opening 41 penetrating along the axial direction of the central hole, and the opening 41 communicates with the through-flow channel 30. The protective casing 10 is connected with the electromagnetic assembly 20 by the connecting assembly 40, and the opening 41 is communicated with the flow passage 30 on the premise of ensuring the connection stability, so that the circulation punching of punching liquid is ensured.

As shown in fig. 3, the connection assembly 40 includes a locking member 42, the locking member 42 being connected to an end of the power supply 24 remote from the magnetic attraction member 22, an outer circumferential surface of the locking member 42 being connected to an inner hole wall of the center hole of the protection housing 10, the locking member 42 having an opening 41. The power supply 24 is connected with the protective shell 10 by the locking piece 42, so that the connection stability is ensured, and meanwhile, the opening 41 is arranged on the locking piece 42, so that the circulation smoothness of punching liquid is ensured.

As shown in fig. 2, the inner wall of the center hole of the protective housing 10 has a connecting screw 12, and the outer circumferential surface of the locking member 42 is connected to the connecting screw 12. The protective shell 10 is connected with the locking piece 42 through the connecting threads 12, so that the connection stability is effectively ensured, and meanwhile, the disassembly and assembly are convenient.

Optionally, the outer wall of the protective casing 10 is further provided with a clamping groove 15, and the clamping groove 15 can be used for connecting the strong electromagnetic fisher for drilling, which is applied by the self, in external equipment.

As shown in fig. 7, the plurality of openings 41 are provided, and the plurality of openings 41 are arranged at intervals along the circumferential direction of the locking member 42, so that the smoothness of the circulation of the punching liquid is improved while the stability of the locking member 42 is ensured.

Specifically, the power supply 24 includes a lithium battery barrel, one end of the lithium battery barrel, which is far away from the magnetic attraction member 22, has a fixing shaft 241 extending therefrom, and the locking member 42 has a positioning hole 421 at a center position thereof for fixing the fixing shaft 241. The lithium battery barrel can continuously output strong current to the magnetizing coil 23, so that the magnetic attraction piece 22 is ensured to attract ferromagnetic falling objects stably.

The magnetizing coil 23 is supplied with power by the power supply 24, the magnetic attraction piece 22 is magnetized by the magnetic field of the magnetizing coil 23 under the electromagnetic induction principle, and the power supply 24 continuously outputs strong current, so that the magnetic attraction piece 22 is equivalent to a strong magnet in the salvaging process, and in the salvaging process, the small objects in the hole have ferromagnetic falling objects to be attracted by the magnetic attraction piece 22, and the strong electromagnetic salvaging device for drilling is slowly put forward, so that the salvaging effect can be realized.

As shown in fig. 4, the electromagnetic assembly 20 further includes a coil sheath 25, where the coil sheath 25 has a main body 251 and a sealing sleeve 252, the main body 251 is disposed on a side of the magnetic attraction piece 22 away from the magnetic attraction surface 21, and the sealing sleeve 252 extends from the main body 251 to the side of the magnetic attraction surface 21 and is sleeved outside the magnetizing coil 23, so that the magnetizing coil 23 is sealed inside the sealing sleeve 252. The magnetizing coil 23 is sealed by the sealing sleeve 252, so that the sealing and water-proof effects are achieved, the magnetizing coil 23 is guaranteed to be dry, the magnetizing effect on the magnetic attraction piece 22 is guaranteed, and falling objects are prevented from falling again in the salvaging process.

Specifically, the outer peripheral side of the main body 251 is connected to the inner wall of the center hole of the protective case 10, and the main body 251 is provided with a relief hole 253 penetrating in the axial direction of the center hole, and the relief hole 253 communicates with the flow passage 30. The main body 251 is used for connecting the magnetic attraction piece 22 with the protective shell 10, so that the connection is stable, meanwhile, the avoidance hole 253 is communicated with the flow passage 30, and the circulation smoothness of punching liquid is ensured.

As shown in fig. 6, the magnetic attraction member 22 comprises a magnetizing body 221 and a connecting column 222, the magnetizing coil 23 is sleeved on the outer peripheral side of the magnetizing body 221, one end of the magnetizing body 221, which is far away from the power supply 24, is provided with a circumferential flange 223, one side of the circumferential flange 223, which faces the power supply 24, is in sealing connection with one end of the coil sheath 25, and the end face of the magnetizing body 221, which is far away from the power supply 24, is a magnetic attraction surface 21; the connecting column 222 is disposed at one end of the magnetizing body 221 away from the magnetic attraction surface 21, and the connecting column 222 extends toward the power source 24, and the central position of the main body 251 has a limiting hole for the connecting column 222 to pass through, where the wall of the limiting hole is connected with the outer peripheral surface of the connecting column 222 in a sealing manner. By providing the circumferential flange 223 from one end of the charging body 221 and on the same side as the magnetic attraction surface 21, the area of the magnetic attraction surface 21 is increased, and the stability in attracting the junk is improved. By providing the connection cylinder 222 to protrude toward the power source 24 and the main body portion 251 is connected to the connection cylinder 222 by the limit hole, connection stability is ensured. And the connection cylinder 222 is hermetically connected with the main body 251 to ensure that the magnetizing coil 23 is dry.

Optionally, the side of the circumferential flange 223 facing the power supply 24 is in sealing connection with one end of the coil sheath 25 by means of a sealing member 26, and the sealing water-proof effect is ensured by compacting between the circumferential flange 223 and the coil sheath 25, so that the magnetizing coil 23 is ensured to be dry.

Of course, the end surface of the main body 251 facing the magnetic attraction surface 21 may be hermetically connected to the end surface of the charging body 221 facing the power supply 24.

In the present embodiment, the connection cylinder 222 is hermetically connected to the main body 251, and the end surface of the main body 251 facing the magnetic attraction surface 21 is hermetically connected to the end surface of the charging body 221 facing the power supply 24.

Optionally, the hole wall of the limiting hole is in threaded connection with the outer peripheral surface of the connecting cylinder 222, so that the sealing performance can be improved while the assembly and the disassembly are convenient.

As shown in fig. 6, the end of the connecting column 222 away from the charging body 221 has a connection port 2221 connected to the power source 24, and the connection port 2221 is used to facilitate the neutrality between the power source 24 and the connecting column 222, thereby improving the connection stability.

As shown in fig. 2, the inner hole wall of the central hole of the protective housing 10 is provided with a clamping protrusion 13, and the end surface of one side of the main body 251 away from the power supply 24 is limited by clamping with the clamping protrusion 13, so that the position of the main body 251 connected to the protective housing 10 can be limited, and the main body 251 can be prevented from shaking while being installed and positioned conveniently.

As shown in fig. 2, the outer peripheral surface of the front end of the protective casing 10 is provided with a reducing section 14, and the drilling piece 11 is arranged on the inclined surface of the reducing section 14, so that the sweeping and drilling effect is improved, the contact area between the magnetic attraction surface 21 and the falling objects is avoided, and the salvaging efficiency is ensured.

As shown in fig. 2, the magnetic attraction surface 21 is flush with the front end of the protective housing 10, so that the contact area between the magnetic attraction surface 21 and falling objects is avoided while the hole sweeping function is ensured, and the salvaging efficiency is ensured.

Of course, the magnetic attraction surface 21 can also extend out of the protective casing 10, so that the attraction of the blocking object by the electromagnetic assembly 20 is further avoided.

When the strong electromagnetic fisher for well drilling of this embodiment is installed, the magnetizing coil 23 is wound on the magnetic attraction piece 22 and then is installed in the coil sheath 25, the coil sheath 25 and the magnetic attraction piece 22 are screwed up to promote the compaction of the sealing piece 26, the sealing and water-proof effects are achieved, the magnetizing coil 23 is guaranteed to be dry, the power supply 24 is inserted into the connection port 2221 on the magnetizing body 221, the locking piece 42 is sleeved on the fixing shaft 241 on the power supply 24, and the combined locking piece 42, the power supply 24, the coil sheath 25, the magnetizing coil 23 and the magnetic attraction piece 22 are sequentially inserted into the protective housing 10, and the locking piece 42 is screwed up to guarantee the sealing connection between the power supply 24 and the magnetic attraction piece 22.

The strong electromagnetic fisher for well drilling of this embodiment applies strong current to the multi-turn magnetizing coil 23 wound on the magnetic attraction piece 22 in the coil sheath 25 through the power supply 24, the magnetic attraction piece 22 is magnetized by the electromagnetic induction principle, magnetic force is generated on the magnetic attraction surface 21 of the magnetic attraction piece 22, after the strong electromagnetic fisher for well drilling of this embodiment descends into a borehole, after the magnetic attraction surface 21 approaches or approaches to ferromagnetic objects in the borehole, the ferromagnetic objects are attracted by the strong electromagnetic force generated by the magnetic attraction surface 21, and finally the objects are lifted out of the borehole, so as to achieve the purpose of accident handling. In the process of drilling and salvaging, if the strong electromagnetic salvaging device for drilling is blocked, the punching liquid circulation can be established through the flow passage 30, and the drilling tool can be rotated, and the drilling part 11 at the front end of the protective casing 10 is used for sweeping holes so as to continue the process of drilling and salvaging.

Example two

The difference from the first embodiment is that the main body 251 is connected to the protective casing 10 in a different manner.

In a specific embodiment, not shown, the outer peripheral side of the main body portion 251 is spaced from the inner hole wall of the center hole of the protective housing 10, that is, the space between the outer peripheral side of the main body portion 251 and the inner hole wall of the center hole of the protective housing 10 is a part of the flow passage 30.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

1. through setting up electromagnetic assembly 20 attraction ferromagnetism junk, can charge along with the time, there is not the problem of long-term use loss of magnetism or degaussing, improved the suction to the junk, guaranteed salvage efficiency, still increased the life of well drilling with strong electromagnetic salvage ware.

2. The drilling part 11 is arranged at the front end of the protective casing 10, so that the drilling part can sweep holes and drill downwards when encountering resistance during shrinkage in drilling holes, and the drilling strong electromagnetic fisher can be ensured to smoothly extend into the drilling holes.

3. Through setting up the passageway 30 that overflows, can conveniently establish the punching liquid circulation in the salvaging process of boring down and punch a hole to make the drilling slag that drilling piece 11 bore down follow the punching liquid in time and discharge, guarantee that the drilling can be unobstructed with strong electromagnetism fisher and bore down, guarantee salvage efficiency.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (14)

1. A strong electromagnetic latch jack for drilling a well, comprising:

-a protective housing (10), the protective housing (10) having a central bore, the front end of the protective housing (10) having a drilling member (11);

electromagnetic component (20), electromagnetic component (20) have the orientation protective housing (10) front end's magnetism inhale face (21), electromagnetic component (20) are used for attracting ferromagnetism junk, at least a portion of electromagnetic component (20) sets up in the centre bore, just the outer peripheral face of electromagnetic component (20) with the hole wall interval setting of the centre bore of protective housing (10) to form between the two along the axial of centre bore link up overflow channel (30), overflow channel (30) are used for circulating the punching liquid.

2. The strong electromagnetic fisher for drilling as claimed in claim 1, characterized in that said electromagnetic assembly (20) comprises:

a magnetic attraction piece (22), wherein the magnetic attraction piece (22) is provided with the magnetic attraction surface (21);

a magnetizing coil (23), wherein the magnetizing coil (23) is sleeved outside the magnetic attraction piece (22);

and one end of the power supply (24) is connected with one side, far away from the magnetic attraction surface (21), of the magnetic attraction piece (22), and the magnetizing coil (23) is electrically connected with the power supply (24).

3. The strong electromagnetic fisher for well drilling according to claim 2, characterized in that it further comprises a connection assembly (40), at least one part of the connection assembly (40) being connected with the protective casing (10), at least another part of the connection assembly (40) being connected with the electromagnetic assembly (20), the connection assembly (40) having an opening (41) passing through in the axial direction of the central hole, the opening (41) being in communication with the flow-through channel (30).

4. A strong electromagnetic latch jack for drilling according to claim 3, wherein said connection assembly (40) includes a latch member (42), said latch member (42) being connected to an end of said power source (24) remote from said magnetic attraction member (22), an outer peripheral surface of said latch member (42) being connected to an inner bore wall of a central bore of said protective housing (10), said latch member (42) having said opening (41).

5. The strong electromagnetic latch jack for well drilling according to claim 4, wherein the inner wall of the central hole of the protective housing (10) has a connecting screw thread (12), and the outer circumferential surface of the locking member (42) is connected to the connecting screw thread (12).

6. The strong electromagnetic latch jack for well drilling according to claim 4, wherein said plurality of openings (41) are provided in plural, and a plurality of said openings (41) are provided at intervals along the circumferential direction of said locking member (42).

7. The strong electromagnetic latch jack for well drilling according to claim 4, wherein said power supply (24) comprises a lithium battery barrel, an end of said lithium battery barrel remote from said magnetic attraction member (22) has a fixed shaft (241) extending therefrom, and a positioning hole (421) for fixing said fixed shaft (241) is provided at a center position of said locking member (42).

8. The strong electromagnetic fisher for well drilling according to claim 2, wherein the electromagnetic assembly (20) further comprises a coil sheath (25), the coil sheath (25) has a main body part (251) and a sealing sleeve (252), the main body part (251) is disposed at one side of the magnetic attraction piece (22) away from the magnetic attraction surface (21), and the sealing sleeve (252) extends from the main body part (251) to one side of the magnetic attraction surface (21) and is sleeved outside the magnetizing coil (23), so that the magnetizing coil (23) is sealed inside the sealing sleeve (252).

9. The strong electromagnetic latch jack for well drilling according to claim 8, wherein an outer peripheral side of the main body portion (251) is connected to an inner hole wall of a center hole of the protective housing (10), a relief hole (253) penetrating in an axial direction of the center hole is provided in the main body portion (251), and the relief hole (253) communicates with the through-flow passage (30).

10. The strong electromagnetic fisher for well drilling as claimed in claim 8, characterized in that said magnetic attraction element (22) comprises:

the magnetizing coil (23) is sleeved on the outer circumferential side of the magnetizing coil (221), one end, far away from the power supply (24), of the magnetizing coil (221) is provided with a circumferential flange (223), one side, facing the power supply (24), of the circumferential flange (223) is in sealing connection with one end of the coil sheath (25), and the end face, far away from the power supply (24), of the magnetizing coil (221) is the magnetic attraction surface (21);

the connecting column body (222), the connecting column body (222) is arranged at one end of the charging body (221) far away from the magnetic attraction surface (21), the connecting column body (222) extends towards the power supply (24), and a limiting hole for the connecting column body (222) to pass through is formed in the center of the main body part (251); the hole wall of the limit hole is in sealing connection with the outer peripheral surface of the connecting column body (222); and/or

An end face of the main body part (251) facing the magnetic attraction surface (21) is in sealing connection with an end face of the magnetizing body (221) facing the power supply (24).

11. The strong electromagnetic latch jack for well drilling according to claim 10, wherein an end of the connecting cylinder (222) remote from the charging body (221) has a connection port (2221) connected to the power supply (24).

12. The strong electromagnetic fisher for well drilling according to claim 8, wherein an inner hole wall of the central hole of the protective housing (10) is provided with a clamping protrusion (13), and an end surface of one side of the main body part (251) away from the power supply (24) is clamped and limited with the clamping protrusion (13).

13. The strong electromagnetic latch jack for drilling according to any one of claims 1 to 12, wherein an outer peripheral surface of a front end of the protective housing (10) has a reduced diameter section (14), and the drilling member (11) is disposed on an inclined surface of the reduced diameter section (14).

14. The strong electromagnetic overshot for drilling as set forth in any one of the claims 1 to 12, characterized in,

the magnetic attraction surface (21) is flush with the front end of the protective shell (10); or (b)

The magnetic attraction surface (21) extends out of the protective shell (10).