CN112761563B - Special electromagnetic salvage device for electromagnetic salvage system of large-diameter engineering well - Google Patents
Special electromagnetic salvage device for electromagnetic salvage system of large-diameter engineering well Download PDFInfo
- Publication number
- CN112761563B CN112761563B CN202110111857.0A CN202110111857A CN112761563B CN 112761563 B CN112761563 B CN 112761563B CN 202110111857 A CN202110111857 A CN 202110111857A CN 112761563 B CN112761563 B CN 112761563B
- Authority
- CN
- China
- Prior art keywords
- disc body
- electromagnetic
- waterproof
- resistance
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000009434 installation Methods 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 23
- 239000011347 resin Substances 0.000 claims description 23
- 239000010410 layer Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 description 27
- 239000002184 metal Substances 0.000 description 27
- 238000005553 drilling Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 13
- 239000012530 fluid Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- -1 cones Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Electromagnets (AREA)
Abstract
The invention provides a special electromagnetic salvage device for an electromagnetic salvage system of a large-diameter engineering well, which comprises a hollow disc body, wherein an iron core is arranged in an inner cavity of the disc body, a coil is wound on the iron core, and the coil is connected with a control lead at the underground end; the upper surface of the top plate of the tray body is provided with a resistance-reducing flow guide body; a plurality of lifting lugs are further arranged on the upper surface of the top plate of the tray body; the lifting lugs are uniformly distributed around the resistance reducing flow guide body; and the resistance reducing guide body is provided with an air hole which penetrates through the resistance reducing guide body, the disc body top plate and the disc body bottom plate along the axial direction. Compared with a permanent magnet commonly used by an oil fishing tool, the permanent magnet has stronger magnetic attraction force by using the electromagnet technology, the maximum volume, the maximum weight and the maximum capture distance of salvaged falling objects are greatly enhanced, the salvage success rate is higher, and the permanent magnet is more suitable for the self characteristics of a large-diameter well.
Description
Technical Field
The invention belongs to the field of geotechnical engineering, relates to the junk fishing of a large-diameter engineering well, and particularly relates to a special electromagnetic fishing device for an electromagnetic fishing system of the large-diameter engineering well.
Background
Compared with the conventional drilling engineering, the drilling construction of the large-diameter engineering well has the advantages of low drilling speed, long construction period and no API standard certification of the adopted drill bit, so that the possibility of metal falling caused by the dropping of the drill bit, the falling of a wellhead and the like is higher. If the existence of metal junk is not discovered in time and the fishing operation is carried out in time, the drill bit is damaged to cause the part to fall off to form a secondary junk, even the drill is stuck, and the engineering progress and the construction safety are seriously threatened.
However, in the domestic large-diameter drilling engineering field, no special and professional metal falling object fishing equipment or related drilling tools exist, and under the condition that people are forced to do so:
the first choice of a well team often borrows salvage drilling tools customized for the petroleum drilling industry, however, the design of the salvage drilling tools is originally designed to serve small-diameter oil and gas wells, the large-diameter wells are too small, the size and the specification are insufficient, the performance cannot meet the working condition, and the salvage success rate is very low;
the second choice of the drilling team is to use the mechanical characteristics of the oil drilling fishing drilling tool to perform amplification processing according to a certain proportion, or to process soil tools on site, such as a slip fisher and a steel wire rope fishing barrel, etc., in order to ensure satisfactory fishing efficiency, the sectional area of the device has to be enlarged to be nearly full to ensure sufficient grabbing coverage area, however, the application effect is not good after field tests. Moreover, the device is too large in size, and the pressure in the well is excited when the well is tripped out, so that the well wall is easy to drop, unstable and collapse, even the well is stuck, and secondary accidents are caused.
Finally, even a constructor carelessly discards a well when the junk cannot be handled, neglects humanity in order to save property loss, and unfortunately hires a frogman to submerge in the well bottom, so that the whole engineering project bears serious potential safety hazards.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the special electromagnetic overshot for the electromagnetic fishing system for the large-diameter engineering well, and solve the technical problem that the fishing efficiency of the electromagnetic overshot in the electromagnetic fishing system for the large-diameter engineering well in the prior art needs to be improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
a special electromagnetic salvage device for an electromagnetic salvage system of a large-diameter engineering well comprises a hollow disk body, wherein the disk body comprises a disk body side wall shell, a disk body top plate is arranged at the top end of the disk body side wall shell, a disk body bottom plate is arranged at the bottom of the disk body side wall shell, and a hollow cavity formed by the disk body side wall shell, the disk body top plate and the disk body bottom plate is an inner cavity of the disk body;
an iron core is arranged in the inner cavity of the disc body, a coil is wound on the iron core, and the coil is connected with a control lead at the underground end;
the upper surface of the top plate of the tray body is provided with a resistance-reducing flow guide body;
a plurality of lifting lugs are further arranged on the upper surface of the top plate of the tray body; the lifting lugs are uniformly distributed around the resistance reducing flow guide body;
and the resistance reducing guide body is provided with an air hole which penetrates through the resistance reducing guide body, the disc body top plate and the disc body bottom plate along the axial direction.
The invention also has the following technical characteristics:
the tray body side wall shell on evenly distributed be provided with the multiunit water hole, the water hole is linked together with the tray body cavity.
The top of iron core consolidate on the lower surface of disk body roof, the bottom of iron core stretches out the iron core of seting up on the disk body bottom plate and stretches out the hole, and the bottom of iron core and the lower surface parallel and level of disk body bottom plate.
The air holes are coaxially arranged and are positioned in the inner cavity of the disc body where the coil is positioned.
A plurality of guide pulley block units are uniformly distributed on the side wall shell of the tray body along the axial direction; the guide pulley block unit comprises a base arranged on a side wall shell of the disc body, a plurality of pulley installation cavities are formed in the base, the radial outer sides of the pulley installation cavities are open, a pair of spring installation guide grooves which are oppositely arranged are formed in the inner wall of each pulley installation cavity along the radial direction, the radial outer ends of the pair of spring installation guide grooves are closed, one ends of pulley shafts are vertically arranged in the pair of spring installation guide grooves respectively, and the pulley shafts can slide in the pair of spring installation guide grooves along the radial direction; the pulley shaft is provided with a pulley, a pair of spring installation guide grooves are respectively and radially provided with a return spring, one end of each return spring is propped against the radial inner end of each spring installation guide groove, and the other end of each return spring is propped against the pulley shaft.
The lower surface of the bottom plate of the tray body and the bottom end of the iron core are coated with a layer of wear-resistant resin coating, and the air holes penetrate through the wear-resistant resin coating.
The resistance reducing guide body is provided with a wire passing hole which is communicated with the resistance reducing guide body and the top plate of the disc body along the axial direction, a waterproof wire box is arranged in the wire passing hole, and the waterproof wire box is used for connecting the coil with a control lead at the underground end.
The wiring hole comprises a resistance-reducing flow guide body wiring hole and a disc body wiring hole which are coaxially arranged, the resistance-reducing flow guide body wiring hole is formed in a resistance-reducing flow guide body, the disc body wiring hole is formed in a top plate of the disc body, and the inner diameter of the resistance-reducing flow guide body wiring hole is larger than that of the disc body wiring hole;
the lower part of the waterproof wire box is arranged in the wiring hole of the tray body, and the upper part of the waterproof wire box is arranged in the wiring hole of the resistance-reducing flow guide body; the resistance reducing guide body routing hole is filled with a first insulating resin packing layer, and the first insulating resin packing layer wraps and seals the waterproof wire box in the routing hole;
the top surface of the first insulating resin packing layer and the surface of the resistance reducing and flow guiding body are in smooth transition and are in an integrated structure.
The waterproof wire box comprises a waterproof tube body with an open top and an open bottom, a binding post is arranged in the middle position in the waterproof tube body, waterproof glue layers are arranged at the top and the bottom in the waterproof tube body, and a waterproof bolt is arranged at the top outside the waterproof tube body; the downhole end control lead sequentially penetrates through the waterproof plug and the waterproof adhesive layer and is connected with the wiring terminal, and the wiring terminal of the coil penetrates through the waterproof adhesive layer at the bottom of the waterproof pipe body and is connected with the wiring terminal;
and a second insulating resin filler layer is filled in the waterproof pipe body between the waterproof glue layers.
The fishing basket comprises a side wall shell, a circle of first limiting shoulder is arranged at the middle position in the side wall shell along the circumferential direction, and a circle of second limiting shoulder is arranged at the inner bottom end position of the side wall shell along the circumferential direction;
a plurality of fixing plates which are uniformly distributed are fixedly arranged on the inner surface of the side wall shell close to the second limiting circular bead, the bottom of each fixing plate is correspondingly and rotatably provided with a plurality of one-way bottom flaps which are radially and inwardly distributed, a reset torsion spring is arranged between each fixing plate and the upper surface of the corresponding one-way bottom flap, and the plurality of one-way bottom flaps form a fishing basket bottom plate which can be opened inwards in one way under the action of the reset torsion springs and the second limiting circular bead.
The upper part of the side wall shell and the lower part of the side wall shell of the tray body are provided with corresponding fishing basket mounting holes, and connecting pieces are arranged in the fishing basket mounting holes.
Compared with the prior art, the invention has the following technical effects:
compared with a permanent magnet commonly used by an oil fishing tool, the permanent magnet type oil fishing tool has stronger magnetic attraction, greatly enhances the maximum volume, the maximum weight and the maximum capture distance of the salvaged falling objects, has higher salvage success rate, and is more suitable for the self characteristics of a large-diameter well.
In the lifting process of the special electromagnetic fisher, the resistance reducing guide body on the upper part of the disk body can reduce water resistance generated in the lifting process of the fisher, reduce cable tension and underwater exciting pressure in a well at the starting moment, realize drainage and ensure the safety of lifting.
(III) the existing fishing tool depends on a drill rod in the tripping mode, and the average tripping speed of tripping of a common drilling crew is about 4m/min. The invention has the advantages that the lowering and the lifting can be realized only by matching with a special winch, the time consumption of the salvaging operation under the unit depth is shorter than that of the conventional method, the maximum time can reach 30m/min, which is 7.5 times of that of the conventional method, and the rescue period is more favorable.
The Invention (IV) is specially designed for the well body structure and the working condition characteristics of the large-diameter well, and compared with a special fishing tool for an oil-gas well, the fishing tool is more professional and special for the large-diameter well, and has wider applicability among wells.
And (V) in the process of lowering or lifting the special electromagnetic overshot, the guide pulley block units arranged around the disc body have the functions of rolling guide, reducing friction between the disc body and the well wall, buffering collision between the disc body and the well wall and protecting the disc body, so that the special electromagnetic overshot can smoothly and stably pass through a shaft.
The invention designs a detachable salvage basket as an adsorption anti-falling protection device. Firstly, whether the detachable salvage basket is selected or not can be determined according to different shapes and sizes of the metal falling objects, the salvage pertinence and flexibility of the invention are further improved, and secondly, when the detachable salvage basket is selected and installed for salvage operation, the falling objects caused by any reason can be prevented from falling back, and once the falling objects are captured, the salvage success is indicated.
Drawings
Fig. 1 is an overall structural schematic diagram of the special electromagnetic overshot of the invention.
Fig. 2 is a schematic top view of the electromagnetic overshot of the present invention.
Fig. 3 is a front cross-sectional structural schematic diagram of the special electromagnetic overshot of the invention.
Fig. 4 is a schematic view of the internal structure of the guide pulley block unit of the present invention.
Fig. 5 is a schematic structural view of a wiring hole and a waterproof wire box of the present invention.
FIG. 6 is a schematic view of the overall construction of the basket of the present invention.
FIG. 7 is a front half cross-sectional structural schematic view of a junk basket of the present invention.
Fig. 8 is a schematic diagram of the internal structure of the fishing basket of the present invention.
The meaning of the individual reference symbols in the figures is: 7-downhole end control wires;
601-a disc body, 602-an iron core, 603-a coil, 604-a resistance-reducing flow guide body, 605-a lifting lug, 606-an air eye, 607-a water eye, 608-an iron core extending hole, 609-a guide pulley block unit, 610-a wear-resistant resin coating, 611-a wire running hole, 612-a waterproof wire box, 613-a first insulating resin packing layer, 614-a fishing basket and 615-a streamline pit;
60101-plate body side wall outer shell, 60102-plate body top plate, 60103-plate body bottom plate and 60104-plate body inner cavity;
60901-base, 60902-pulley installation cavity, 60903-spring installation guide groove, 60904-pulley shaft, 60905-pulley, 60906-reset spring;
61101-resistance-reducing flow guide body wiring hole, 61102-disc body wiring hole;
61201-waterproof pipe body, 61202-binding post, 61203-waterproof glue layer, 61204-waterproof bolt, 61205-second insulating resin filler layer;
61401-side wall shell, 61402-first limit shoulder, 61403-second limit shoulder, 61404-fixing plate, 61405-one-way bottom flap, 61406-reset torsion spring, 61407-fishing basket mounting hole and 61408-connecting piece.
The present invention will be explained in further detail with reference to examples.
Detailed Description
In the invention, the large-diameter engineering well refers to an engineering well with a diameter of more than 0.5m, and generally, the diameter of a common large-diameter engineering well is in the range of 0.6m to 1.2 m.
In the present invention, the present invention is further explained by referring to the entire contents described in the chinese invention patent with the application publication No. CN 110578490A and the patent name "an electromagnetic fishing system for large-diameter engineering well and its special cable".
In the invention, the electromagnetic fishing system for the large-diameter engineering well is a known system in the prior art, and as a preferable scheme of the invention, the electromagnetic fishing system for the large-diameter engineering well adopts an electromagnetic fishing system for the large-diameter engineering well, which is described in Chinese invention patent with the application publication number of CN 110578490A and the patent name of "an electromagnetic fishing system for the large-diameter engineering well and a special cable thereof".
The invention relates to a special electromagnetic salvage device for metal falling objects, which is specially designed for an electromagnetic salvage system for large-diameter engineering wells. Particularly suitable large sized falling objects may include, but are not limited to, metal objects of similar size, shape, size, and weight to drills, joints, slips, and reamer steel plates; particularly suitable small-sized falling objects comprise but are not limited to metal objects with the specifications, shapes, sizes and weights close to those of metal falling parts, metal fragments, cones, metal tooth sheets, metal tools falling into ground wellheads, reinforcing steel bars, steel wires, steel cables and the like in various sizes; is particularly suitable for metal objects which can be in direct contact with the disk body in a larger area. According to the difference of the processing volume, the coil arrangement design and the shape and the posture of the falling object, the fishing of the single falling object below 1.5t can be realized at most, but the fishing tool cannot be used for fishing the tripped drill rod string.
The following embodiments are given as examples of the present invention, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are included in the protection scope of the present invention.
The embodiment is as follows:
the embodiment provides a special electromagnetic salvage device for an electromagnetic salvage system of a large-diameter engineering well, which comprises a hollow disc body 601, wherein the disc body 601 comprises a disc body side-wall shell 60101, a disc body top plate 60102 is arranged at the top end of the disc body side-wall shell 60101, a disc body bottom plate 60103 is arranged at the bottom of the disc body side-wall shell 60101, and a hollow cavity formed by the disc body side-wall shell 601, the disc body top plate 60102 and the disc body bottom plate 60103 is a disc body inner cavity 60104;
an iron core 602 is arranged in the disc body inner cavity 60104, a coil 603 is wound on the iron core 602, and the coil 603 is connected with a downhole end control lead 7;
a resistance reducing flow guide body 604 is arranged on the upper surface of a tray body top plate 60102 of the tray body 601;
a plurality of lifting lugs 605 are further arranged on the upper surface of the tray body top plate 60102 of the tray body 601; the lifting lugs 605 are uniformly distributed around the drag reduction guide body 604;
an air hole 606 penetrating through the resistance-reducing flow guide body 604, the tray body top plate 60102 and the tray body bottom plate 60103 is formed in the resistance-reducing flow guide body 604 along the axial direction.
In this embodiment, the iron core 602 is made of silicon iron soft magnetic alloy, the coil 603 is made of pure copper, and the outer surface of the coil is covered with a waterproof polyester resin paint coating. The coils 603 densely surround the iron core 602 to form turns, the turns are tightly fitted in the radial direction, and the distance is kept in the normal direction, and is about 0.5 times of the diameter of the turn wire adopted by the coils 603.
In this embodiment, the tray body side-wall casing 60101 and the tray body top plate 60102 are made of high-permeability nickel steel. The base plate 60103 of the plate body is made of stainless steel. Due to the matching of the materials, the magnetic conduction and shielding of the periphery can be established between the disk body side wall shell 60101 and the disk body top plate 60102, and the disk body bottom plate 60103 serves as an armature.
In this embodiment, preferably, 3 lifting lugs 605 are fixed on the top edge of the tray body top plate 60102 at equal angular intervals of 120 °, and the lifting lugs 605 perform hollow-out shape modification on the space occupied by the resistance-reducing fluid guide 604.
In this embodiment, the flow-reducing and resistance-guiding body 604 is made of hard engineering resin, the overall shape is conical, the tip is bullet-shaped or cone-head-shaped, the flow-reducing and resistance-guiding body 604 and the lifting lug 605 are overlapped at a spatial position, and the flow-reducing and resistance-guiding body 604 is designed into a streamlined recess 615 towards the cone head along the overlapping position. An air hole 606 is provided on each streamlined recess 615.
As a preferable scheme of this embodiment, a plurality of groups of water holes 607 are uniformly distributed on the disk body side wall casing 60101, and the water holes 607 are communicated with the disk body inner cavity 60104. Port 607 is provided to communicate the interior chamber 60104 of the tray with the outside environment. When the fishing tool is submerged in water after being lowered into the well shaft, water in the well shaft enters the disc body cavity 60104 through the water hole 607 and establishes flow, gas in the disc body cavity 60104 is displaced out of the gas hole 606, and the disc body cavity 60104 is filled with water. Because the heat dissipation capacity of the special electromagnetic salvage device is large in the power-on process, the magnetic attraction loss can be caused when the special electromagnetic salvage device works at high temperature, water flow can effectively dissipate heat for the coil, water cooling is realized, and the strength of the magnetic field and the magnetic attraction is kept at a high level.
As a preferable scheme of this embodiment, the top end of the core 602 is fixed to the lower surface of the tray top plate 60102, the bottom end of the core 602 extends out of a core extending hole 608 formed in the tray bottom plate 60103, and the bottom end of the core 602 is flush with the lower surface of the tray bottom plate 60103.
As a preferable scheme of this embodiment, the air hole 606 is coaxially disposed, and the air hole 606 is located in the disc body cavity 60104 where the coil 603 is located. The electromagnetic salvage device can exhaust air better in the lowering process.
As a preferable scheme of this embodiment, a plurality of guide pulley block units 609 are uniformly distributed on the tray body side enclosure 60101 along the axial direction; the guide pulley block unit 609 comprises a base 60901 arranged on a disk body side wall shell 60101, a plurality of pulley installation cavities 60902 are formed in the base 60901, the radial outer side of each pulley installation cavity 60902 is open, a pair of spring installation guide grooves 60903 which are arranged oppositely are formed in the inner wall of each pulley installation cavity 60902 along the radial direction, the radial outer ends of the pair of spring installation guide grooves 60903 are closed, one ends of pulley shafts 60904 are vertically arranged in the pair of spring installation guide grooves 60903 respectively, and the pulley shafts 60904 can slide in the radial direction in the pair of spring installation guide grooves 60903; pulley shaft 60904 is provided with pulley 60905, a pair of spring installation guide grooves 60903 are provided with return springs 60906 in radial direction, one end of return spring 60906 is pressed against the radial inner end of spring installation guide groove 60903, and the other end of return spring 60906 is pressed against pulley shaft 60904.
In this embodiment, the base 60901 is made of engineering plastic. In the process of lowering or lifting the special electromagnetic overshot, the guide pulley block units 609 arranged around the disc body 601 have the functions of rolling guide, reducing friction between the disc body and a well wall, buffering collision between the disc body and the well wall and protecting the disc body, so that the special electromagnetic overshot can smoothly and stably pass through a shaft.
In this embodiment, preferably, the base 60901 is further provided with a water hole 607 corresponding to the water hole 607 on the side enclosure casing 60101 and radially communicated with the water hole 607, so that when the guide pulley block unit 609 is installed on the side enclosure casing 60101, a part of the water hole 607 originally arranged on the side enclosure casing 60101 is prevented from being blocked, and a water flow channel between the disc inner cavity 60104 and the external environment is ensured to be smooth.
As a preferable mode of this embodiment, a wear-resistant resin coating 610 is coated on the lower surface of the tray body base plate 60103 and the bottom end of the core 602, and the air holes 606 penetrate the wear-resistant resin coating 610. The wear-resistant resin coating 610 is flatly coated on the lower surface of the tray body base plate 60103, and the thickness is 1-2 cm.
As a preferable scheme of this embodiment, a wire hole 611 penetrating through the resistance reducing fluid 604 and the top plate 60102 of the disc body is axially formed in the resistance reducing fluid 604, a waterproof wire box 612 is disposed in the wire hole 611, and the waterproof wire box 612 connects the coil 603 with the downhole end control wire 7.
As a preferable scheme of this embodiment, the wire hole 611 includes a resistance-reducing fluid wire hole 61101 and a disc body wire hole 61102 which are coaxially disposed, the resistance-reducing fluid wire hole 61101 is disposed on the resistance-reducing fluid 604, the disc body wire hole 61102 is disposed on the disc body top plate 60102, and an inner diameter of the resistance-reducing fluid wire hole 61101 is greater than an inner diameter of the disc body wire hole 61102;
the lower part of the waterproof wire box 612 is installed in the tray body wiring hole 61102, and the upper part of the waterproof wire box 612 is installed in the resistance-reducing flow guide body wiring hole 61101; a first insulating resin filler layer 613 is filled in the resistance-reducing fluid wiring hole 61101, and the waterproof wire box 612 is wrapped and sealed in the wiring hole 611 by the first insulating resin filler layer 613;
the top surface of the first insulating resin filler layer 613 and the surface of the resistance reducing fluid 604 smoothly transition and present an integrated structure.
As a preferable scheme of this embodiment, the waterproof wire box 612 includes a waterproof tube body 61201 with both open top and bottom, a binding post 61202 is disposed at the middle position in the waterproof tube body 61201, a waterproof adhesive layer 61203 is disposed at both the top and bottom in the waterproof tube body 61201, and a waterproof bolt 61204 is disposed at the top outside the waterproof tube body 61201; the downhole end control lead 7 sequentially passes through the waterproof bolt 61204 and the waterproof adhesive layer 61203 and is connected with the binding post 61202, and the wiring end of the coil 603 passes through the waterproof adhesive layer 61203 at the bottom of the waterproof pipe body 61201 and is connected with the binding post 61202;
preferably, the second insulating resin filler layer 61205 is filled in the waterproof tube body 61201 between the waterproof glue layers 61203. The second insulating resin filler layer 61205 can better perform waterproof insulation sealing of the terminal of the downhole end control wire 7 and the coil 603 in the waterproof tube body 61201.
As a preferable scheme of this embodiment, the bottom of the disc body 601 is further provided with a detachable salvage basket 614, as shown in fig. 6 to 8, the salvage basket 614 includes a side wall housing 61401, a circle of first limit shoulder 61402 is provided at the middle position in the side wall housing 61401 along the circumferential direction, and a circle of second limit shoulder 61403 is provided at the bottom end position in the side wall housing 61401 along the circumferential direction;
a plurality of fixing plates 61404 which are uniformly arranged are fixedly arranged on the inner surface of the side wall shell 61401 close to the second limit shoulder 61403, a plurality of unidirectional bottom flaps 61405 which are arranged inwards along the radial direction are correspondingly arranged at the bottom of each fixing plate 61404 in a rotatable manner, a reset torsion spring 61406 is arranged between each fixing plate 61404 and the upper surface of the corresponding unidirectional bottom flap 61405, and the unidirectional bottom flaps 61405 form a fishing basket bottom plate which can be opened inwards in a unidirectional manner under the action of the reset torsion spring 61406 and the second limit shoulder 61403.
Preferably, corresponding fishing basket installation holes 61407 are arranged on the upper portion of the side wall shell 61401 and the lower portion of the disc body side wall shell 60101, and a connecting piece 61408 is installed in each fishing basket installation hole 61407.
In this embodiment, the side wall housing 61401 is made of aluminum alloy, the fixing plate 61404 and the one-way bottom flap 61405 are made of aluminum alloy, and the return torsion spring 61406 is made of copper.
When the special electromagnetic overshot is used, a bearing steel wire rope of an electromagnetic overshot system for a large-diameter engineering well is connected with a lifting lug 605 of the special electromagnetic overshot for bearing. When a sudden metal falling accident occurs in a large-diameter engineering well, before the special electromagnetic salvage device disclosed by the invention is put into the well through an electromagnetic salvage system for the large-diameter engineering well for salvage operation, clear water is used for displacing slurry in the shaft, the shaft is cleaned, and the cleanness in the shaft is kept. On the basis, the drilling tool is lowered to the bottom of the well, a pump is started to wash the bottom of the well at high pressure, and the rock debris and mud around the falling objects are removed.
After the operation is finished, the special electromagnetic salvage device is put into the large-diameter engineering well through a winch lifting device of an electromagnetic salvage system, the special electromagnetic salvage device is not electrified in the process of putting down, and after the special electromagnetic salvage device is put into the well bottom, the special electromagnetic salvage device is electrified to generate magnetic attraction force, so that the salvage operation is carried out.
After the control lead 7 at the lower end of the well is electrified, direct current passes through the coil 603 to generate a magnetic field, the iron core 602 at the center of the coil turns performs strengthening concentration on the magnetic field, magnetic conduction is established through the disk body side wall shell 60101 and the disk body top plate 60102, shielding for the periphery is established, and the disk body bottom plate 60103 is used as an armature.
In addition, in the processing process of the special electromagnetic overshot, the size of the annular space and the appearance are changed, the size and the number of turns of the coil 603 are adjusted, and the size of the iron core 602 can be adjusted, so that the magnetic force generated by the special electromagnetic overshot can be adjusted, and the overshooting performance of the special electromagnetic overshot can be further adjusted. In the aspect of electrical parameters, in the electrified working process, the power supply current is adjusted through a ground power control system, and the magnetic force generated by the special electromagnetic salvage device can also be adjusted within a certain range, so that different salvage task requirements are met, and the operation flexibility can be improved to a certain extent.
When the special electromagnetic overshot is used for realizing the overshooting of small metal falling objects and part of metal falling objects with special shapes, a detachable overshot basket 614 is assembled at the bottom of the disc body 601. In the fishing basket 614, the first limit shoulder 61402 is used for limiting the installation depth of the tray body 601, and the second limit shoulder 61403 is used for limiting the limit position of the one-way bottom flap 61405 which turns downwards under the action of the reset torsion spring 61406, namely the position perpendicular to the side wall housing 61401, so that the one-way bottom flaps 61405 form a fishing basket bottom plate at the limit position.
When the special electromagnetic fishing device is put into the well bottom, after the special electromagnetic fishing device is electrified, the small metal falling objects extrude the one-way base plate 61405 at the bottom of the fishing basket 614 under the action of the magnetic attraction of the plate body 601, the one-way base plate 61405 turns upwards and opens, the reset torsion spring 61406 is compressed, the small metal falling objects pass through the channel formed by the opening of the one-way base plate 61405 and are adsorbed at the bottom of the plate body 601, and after the small metal falling objects are separated from the one-way base plate 61405, the one-way base plate 61405 returns to the initial closed state under the action of the reset torsion spring 61406 to form a fishing basket bottom plate. The small metal drops into the junk basket 614. At this time, the small metal falling object can be smoothly salvaged out no matter whether the power is continuously supplied or not. If power is cut off, the small metal falling objects lose the magnetic attraction force and naturally fall off to the bottom plate of the fishing basket consisting of the plurality of unidirectional bottom flaps 61405 and are captured.
According to the process, the special electromagnetic salvage device can be repeatedly lifted and lowered within a small range close to the well bottom for 3-5 times, the contact angle and the position of the special electromagnetic salvage device and the well bottom falling objects are changed to a certain extent, repeated attraction and capture are carried out, the salvage success rate of the well bottom metal falling objects is improved, and the salvage amount is increased. After the well bottom fishing operation is completed, the special electromagnetic fishing device is lifted to the ground, the fishing basket 614 is dismounted, and the junk is cleaned to complete the fishing.
When the special electromagnetic salvage device is used for salvaging large metal falling objects and part of metal falling objects with special shapes, the detachable salvage basket 614 is not assembled at the bottom of the plate body 601. The tray body floor 60103 of the special electromagnetic overshot is exposed and comes into direct contact with the falling objects.
The special electromagnetic salvaging device is put into the well bottom and then lifted in an experiment, and the aim is to record the tensile force of the no-load lifting of the salvaging device at the depth through the ground reading of the cable load in an electromagnetic salvaging system for the large-diameter engineering well. After the test is finished, the power is switched on to generate magnetic attraction force, and fishing operation is carried out. After the power is on, the special electromagnetic salvage device generates magnetic attraction force, and metal falling objects are attracted and directly attached to a base plate 60103 of a disc body of the special electromagnetic salvage device.
At the moment, the special electromagnetic fisher is lifted, the cable load in an electromagnetic fishing system for a large-diameter engineering well is read, the comparison with the previous idle load data is carried out, whether the special electromagnetic fisher successfully adsorbs metal falling objects is judged, whether the adsorption condition is stable is judged through reading in the lifting process, if the load data is stable, the fact that the falling objects are firmly adsorbed on a disc body bottom plate 60403 of the special electromagnetic fisher is proved, the special electromagnetic fisher is directly lifted to a ground well mouth, the metal falling objects are separated from the disc body bottom plate after power failure, and fishing is successful.
If the load data is unstable and suddenly falls in the lifting process, the falling object is not firmly adsorbed with the bottom plate of the disc body of the special electromagnetic salvage device, or the adsorption posture is not good, and the contact area is too small, the special electromagnetic salvage device is repeatedly lifted and lowered in a small range close to the well bottom, and the contact angle and the contact direction of the special electromagnetic salvage device and the falling object at the well bottom are adjusted to a certain degree, so that the falling object is successfully salvaged.
Claims (9)
1. A special electromagnetic salvage device for an electromagnetic salvage system of a large-diameter engineering well comprises a hollow disc body (601), and is characterized in that the disc body (601) comprises a disc body side wall shell (60101), a disc body top plate (60102) is arranged at the top end of the disc body side wall shell (60101), a disc body bottom plate (60103) is arranged at the bottom of the disc body side wall shell (60101), and a hollow cavity formed by the disc body side wall shell (601), the disc body top plate (60102) and the disc body bottom plate (60103) is a disc body inner cavity (60104);
an iron core (602) is arranged in the inner cavity (60104) of the disc body, a coil (603) is wound on the iron core (602), and the coil (603) is connected with a downhole end control lead (7);
a resistance reducing and flow guiding body (604) is arranged on the upper surface of a tray body top plate (60102) of the tray body (601);
a plurality of lifting lugs (605) are further arranged on the upper surface of a tray body top plate (60102) of the tray body (601);
the resistance reducing guide body (604) is provided with an air hole (606) which penetrates through the resistance reducing guide body (604), the disc body top plate (60102) and the disc body bottom plate (60103) along the axial direction;
a plurality of guide pulley block units (609) are uniformly distributed on the disk body side wall shell (60101) along the axial direction; the guide pulley block unit (609) comprises a base (60901) arranged on a disk body side wall shell (60101), a plurality of pulley installation cavities (60902) are formed in the base (60901), the radial outer sides of the pulley installation cavities (60902) are open, a pair of spring installation guide grooves (60903) which are oppositely arranged are formed in the inner wall of the pulley installation cavity (60902) along the radial direction, the radial outer ends of the pair of spring installation guide grooves (60903) are closed, one ends of pulley shafts (60904) are respectively and vertically arranged in the pair of spring installation guide grooves (60903), and the pulley shafts (60904) can slide in the pair of spring installation guide grooves (60903) along the radial direction; a pulley (60905) is mounted on a pulley shaft (60904), a pair of spring mounting guide grooves (60903) are respectively and radially provided with a return spring (60906), one end of each return spring (60906) is abutted against the radial inner end of the spring mounting guide groove (60903), and the other end of each return spring (60906) is abutted against the pulley shaft (60904).
2. A special electromagnetic overshot for an electromagnetic fishing system for large diameter engineering wells as claimed in claim 1, A plurality of groups of water holes (607) are uniformly distributed on the disk body side wall shell (60101), and the water holes (607) are communicated with the disk body inner cavity (60104).
3. The special electromagnetic overshot for the electromagnetic fishing system for the large-diameter engineering well is characterized in that the top end of the iron core (602) is fixedly connected to the lower surface of the top plate (60102) of the disc body, the bottom end of the iron core (602) extends out of an iron core extending hole (608) formed in the bottom plate (60103) of the disc body, and the bottom end of the iron core (602) is flush with the lower surface of the bottom plate (60103) of the disc body.
4. A special electromagnetic overshot for an electromagnetic fishing system for large diameter engineering wells according to claim 1, characterized in that the air hole (606) is arranged coaxially, the air hole (606) being located in the inner cavity (60104) of the plate body where the coil (603) is located.
5. The special electromagnetic overshot for the electromagnetic fishing system for large-diameter engineering wells as claimed in claim 1, characterized in that the lower surface of the tray bottom plate (60103) and the bottom end of the iron core (602) are coated with a wear-resistant resin coating (610), and the air hole (606) penetrates through the wear-resistant resin coating (610).
6. The special electromagnetic fisher for the electromagnetic fishing system for the large-diameter engineering well as recited in claim 1, wherein a wire running hole (611) running through the resistance-reducing flow-guiding body (604) and a disc body top plate (60102) is axially formed in the resistance-reducing flow-guiding body (604), a waterproof wire box (612) is arranged in the wire running hole (611), and the coil (603) is connected with a downhole end control wire (7) through the waterproof wire box (612).
7. The special electromagnetic overshot for the electromagnetic fishing system for the large-diameter engineering well according to claim 6, characterized in that the wire hole (611) comprises a resistance-reducing flow guide body wire hole (61101) and a disc body wire hole (61102) which are coaxially arranged, the resistance-reducing flow guide body wire hole (61101) is arranged on the resistance-reducing flow guide body (604), the disc body wire hole (61102) is arranged on the disc body top plate (60102), and the inner diameter of the resistance-reducing flow guide body wire hole (61101) is larger than the inner diameter of the disc body wire hole (61102);
the lower part of the waterproof wire box (612) is arranged in the wire feeding hole (61102) of the disc body, and the upper part of the waterproof wire box (612) is arranged in the resistance-reducing flow guide body wire feeding hole (61101); a first insulating resin filler layer (613) is filled in the resistance-reducing flow guide body wiring hole (61101), and the waterproof wire box (612) is wrapped and sealed in the wiring hole (611) by the first insulating resin filler layer (613);
the top surface of the first insulating resin filler layer (613) and the surface of the flow reducing and guiding body (604) are in smooth transition and are in an integrated structure.
8. The special electromagnetic overshot for the electromagnetic fishing system of the large-diameter engineering well according to claim 6, characterized in that the waterproof line box (612) comprises a waterproof pipe body (61201) with both open top and bottom, a binding post (61202) is arranged in the middle position in the waterproof pipe body (61201), waterproof glue layers (61203) are arranged on both the top and bottom in the waterproof pipe body (61201), and a waterproof plug (61204) is arranged on the top outside the waterproof pipe body (61201); the downhole end control lead (7) sequentially penetrates through the waterproof plug (61204) and the waterproof adhesive layer (61203) and is connected with the binding post (61202), and the wiring end of the coil (603) penetrates through the waterproof adhesive layer (61203) at the bottom of the waterproof pipe body (61201) and is connected with the binding post (61202).
9. The special electromagnetic overshot for the electromagnetic fishing system for the large-diameter engineering well according to claim 1, characterized in that a detachable overshot basket (614) is further arranged at the bottom of the disc body (601), the overshot basket (614) comprises a side wall outer shell (61401), a circle of first limiting shoulder (61402) is circumferentially arranged at the middle position in the side wall outer shell (61401), and a circle of second limiting shoulder (61403) is circumferentially arranged at the bottom end position in the side wall outer shell (61401);
a plurality of uniformly distributed fixing plates (61404) are fixedly mounted on the inner surface of the side wall shell (61401) close to the second limiting shoulder (61403), a plurality of unidirectional bottom flaps (61405) distributed inwards in the radial direction are correspondingly and rotatably mounted at the bottom of each fixing plate (61404), a reset torsion spring (61406) is mounted between each fixing plate (61404) and the upper surface of the corresponding unidirectional bottom flap (61405), and the plurality of unidirectional bottom flaps (61405) form a fishing basket bottom plate capable of being opened inwards in a unidirectional mode under the action of the reset torsion spring (61406) and the second limiting shoulder (61403).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110111857.0A CN112761563B (en) | 2021-01-27 | 2021-01-27 | Special electromagnetic salvage device for electromagnetic salvage system of large-diameter engineering well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110111857.0A CN112761563B (en) | 2021-01-27 | 2021-01-27 | Special electromagnetic salvage device for electromagnetic salvage system of large-diameter engineering well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112761563A CN112761563A (en) | 2021-05-07 |
| CN112761563B true CN112761563B (en) | 2022-11-15 |
Family
ID=75707457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110111857.0A Active CN112761563B (en) | 2021-01-27 | 2021-01-27 | Special electromagnetic salvage device for electromagnetic salvage system of large-diameter engineering well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112761563B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107585B (en) * | 2021-05-14 | 2022-12-23 | 山东科技大学 | Deep and shallow dual-purpose shaft obstacle-removing rescue equipment |
| CN114412405B (en) * | 2022-03-15 | 2023-10-13 | 西南石油大学 | Electromagnetic salvaging system and method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4828026A (en) * | 1988-05-09 | 1989-05-09 | Wilson Industries, Inc. | Remotely operable downhole junk basket system |
| CN2203712Y (en) * | 1994-07-16 | 1995-07-19 | 陕西宝大新技术实业有限公司 | Super magnetic overshot |
| US8689889B2 (en) * | 2011-04-14 | 2014-04-08 | Lee Oilfield Service Ltd. | Downhole magnet tool and method of assembly |
| CN105822244B (en) * | 2016-05-16 | 2018-03-30 | 陈晓新 | For picking up the electromagnetism grabbing device of ferromagnetism object |
| US10072473B2 (en) * | 2016-07-01 | 2018-09-11 | Baker Hughes, A Ge Company, Llc | Conforming magnet tool for recovery of downhole debris |
| WO2018052428A1 (en) * | 2016-09-15 | 2018-03-22 | Halliburton Energy Services, Inc. | Downhole wire routing |
| CN206513333U (en) * | 2017-01-13 | 2017-09-22 | 西南石油大学 | A kind of strong magnetic junk basket for oil drilling |
| CN207538808U (en) * | 2017-11-27 | 2018-06-26 | 中国石油化工股份有限公司 | A kind of universality obtains the device of all kinds of junks in oil well shaft bottom |
| CN209539300U (en) * | 2019-01-07 | 2019-10-25 | 合力（天津）能源科技股份有限公司 | A kind of shaft bottom operation fast salvaging device |
| CN209025640U (en) * | 2019-03-15 | 2019-06-25 | 陕西远信石油工程有限公司 | A kind of oilfield downhole operation fishing device |
-
2021
- 2021-01-27 CN CN202110111857.0A patent/CN112761563B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112761563A (en) | 2021-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112761563B (en) | Special electromagnetic salvage device for electromagnetic salvage system of large-diameter engineering well | |
| US10724300B2 (en) | Downhole drilling tool system of torque self-balancing | |
| EP3289176B1 (en) | Method and system for deploying an electrical load device in a wellbore | |
| WO2013152457A1 (en) | Sidewall coring while drilling tool | |
| US11920440B2 (en) | Well-based potential energy conversion systems and methods | |
| CN108756800B (en) | Welding type downhole fishing tool | |
| CN107476773A (en) | The tool string and method of obstacle in a kind of elimination well | |
| CN213175571U (en) | Conveying device for deep well measuring instrument | |
| US20160290089A1 (en) | Smart fluid completions, isolations, and safety systems | |
| CN2698966Y (en) | Hydraulic down-hole casing valve for under balance drilling | |
| CN112482985B (en) | Drilling equipment is pressed in area of oil gas well head | |
| CN205908266U (en) | Whirl sand removal ware | |
| CN113464064B (en) | Torque overload protection method and device for ultra-deep well small-size drill rod | |
| CN211851685U (en) | Layered oil production pipe column | |
| JP2992815B2 (en) | Wireline waterless geological survey boring equipment | |
| CN201687422U (en) | Self-seal lifting type tubing anchor device | |
| CN110578490B (en) | Electromagnetic fishing system for large-diameter engineering well and special cable thereof | |
| CA3108213A1 (en) | Temporary plugging screen pipe | |
| CN106050178A (en) | Steel wire rope pushing device for drilling tool fishing | |
| CN218117729U (en) | A outer cutting device for jumbo size well casing | |
| CN205370462U (en) | Anticreep device of torsion gyration speed -raising instrument | |
| CN111997550B (en) | Loose stratum coring device and method | |
| CN219795200U (en) | Device for quickly fishing out metal fragments at bottom of well for diamond rope core drilling | |
| CN214697774U (en) | Surface interpolation type quick-mounting wellhead device | |
| CN211524749U (en) | Unhooking-proof underground cable fishing tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guo Liang Inventor after: Liu Mingjun Inventor after: Wang Yi Inventor after: Zhao Yongzhe Inventor after: Song Yubo Inventor after: Yuan Zihang Inventor after: Mo Haitao Inventor after: Qin Ke Inventor after: Feng Wuhong Inventor before: Guo Liang Inventor before: Liu Mingjun Inventor before: Wang Yi Inventor before: Zhao Yongzhe Inventor before: Song Yubo Inventor before: Yuan Zihang Inventor before: Mo Haitao Inventor before: Qin Ke Inventor before: Feng Wuhong |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |