CN108756800B - Welding type downhole fishing tool - Google Patents
Welding type downhole fishing tool Download PDFInfo
- Publication number
- CN108756800B CN108756800B CN201810793499.4A CN201810793499A CN108756800B CN 108756800 B CN108756800 B CN 108756800B CN 201810793499 A CN201810793499 A CN 201810793499A CN 108756800 B CN108756800 B CN 108756800B
- Authority
- CN
- China
- Prior art keywords
- welding machine
- main shaft
- electric welding
- salvaging
- outer shell
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention relates to a downhole fishing tool, in particular to a welded downhole fishing tool. The outer shell is provided with a turbine shaft, a main shaft is arranged below the turbine shaft, the main shaft is fixedly connected with the turbine shaft, a power generation rotor is arranged on the main shaft, a rectifier, an energy storage capacitor and an electric welding machine are sequentially arranged in the outer shell below the main shaft, and a power generation stator, the rectifier, the energy storage capacitor and the electric welding machine are sequentially connected in series; the electric welding machine is characterized in that a mounting seat is arranged below the electric welding machine, a push rod is arranged on the mounting seat, a protective cover is arranged below the push rod, a welding electrode is arranged in the salvaging head, and the welding electrode is electrically connected with the electric welding machine. The electric welding machine is started by pushing the push rod through the falling object, and the falling object and the salvaging tool are welded into a whole through the welding electrode, so that the problem that the existing salvaging tool and the falling object are combined with each other in a weak manner by means of friction force is solved, and the success rate of salvaging the falling object in the pit is improved. The salvaging tool can be suitable for salvaging junks with different diameters by replacing the salvaging head.
Description
Technical Field
The invention relates to a downhole fishing tool, in particular to a welded downhole fishing tool.
Background
In the field of petroleum and natural gas exploration and development, in the oil well operation process, due to the fact that certain stratum conditions are complex, the quality of a shaft is poor, drill rods, logging instruments and the like can be blocked or even broken to fall into the shaft, and drilling accidents and economic losses are caused. Once the corresponding accident occurs, the drill pipe, equipment, etc. that falls into the wellbore must be fished out of the well.
At present, the fishing equipment is various and mainly comprises slip type, sleeve type and the like. These salvaging devices mainly rely on friction force to take out the device (junk) falling into the well bore, but in some specific cases, insufficient friction force can occur, so that the salvaging tool can not salvage and take out the junk, therefore, it is necessary to develop a salvaging tool capable of effectively improving the salvaging success rate of the junk in the well.
Disclosure of Invention
The invention aims at: the welding type underground salvaging tool can effectively solve the problem that an existing salvaging tool by means of friction force is not firmly combined with the junk, and improves the salvaging success rate of underground junk.
The technical scheme of the invention is as follows:
the utility model provides a welding formula fishing tool in pit, it comprises top connection, shell body, turbine shaft, fishing head, electric welding machine, energy storage electric capacity, main shaft and rectifier, its characterized in that: an upper joint is arranged on the top thread of the outer shell, a fishing head is arranged on the bottom thread of the outer shell, a turbine shaft is arranged in the outer shell adjacent to the upper joint through a thrust bearing, a turbine component is arranged between the turbine shaft and the outer shell, a main shaft is arranged in the outer shell below the turbine shaft through symmetrically arranged main shaft bearings, the main shaft is fixedly connected with the turbine shaft, a power generation rotor is arranged on the main shaft between the main shaft bearings, the surface of the power generation rotor is wrapped with a power generation rotor magnetic pole, and a power generation stator is fixedly arranged on the inner wall of the outer shell corresponding to the power generation rotor magnetic pole; a rectifier, an energy storage capacitor and an electric welding machine are sequentially arranged in the outer shell below the main shaft, and a power generation stator, the rectifier, the energy storage capacitor and the electric welding machine are sequentially connected in series; the bottom of the electric welding machine is provided with a starting switch, a mounting seat is fixedly arranged in an outer shell below the electric welding machine, a push rod is movably arranged on the mounting seat and is in intermittent contact connection with the starting switch, a protective cover is arranged below the push rod and is connected with the mounting seat through a spring, a welding electrode is fixedly arranged on the inner wall of a fishing head between the protective cover and the mounting seat through an electrode insulating pad, and the welding electrode is electrically connected with the electric welding machine.
The mounting seat is a T-shaped body, a central hole is formed in the mounting seat, a push rod is movably mounted in the central hole, one end of the push rod extends to the upper side of the mounting seat, and the other end of the push rod extends to the lower side of the mounting seat.
The ejector rod is a T-shaped body.
The top edge of the mounting seat at the periphery of the central hole is provided with an assembly hole, an electrode socket is arranged in the assembly hole and is connected with the electric welding machine through a wire, and the welding electrode is connected with the electrode socket through a wire and a plug.
The edge of the protective cover is provided with a welding electrode notch.
The bottom end of the turbine shaft is provided with a sealing baffle plate which is in sliding sealing connection with the outer shell.
The outer shell above the sealing baffle is provided with a liquid discharge hole.
And a shaft sleeve is arranged between the main shaft bearing and the main shaft.
The fishing head is a cylindrical body with a horn mouth.
The invention has the beneficial effects that:
in the working process of the welding type underground fishing tool, the main shaft is driven to rotate through the turbine shaft, so that the magnetic poles of the power generation rotor are driven to rotate relative to the power generation stator, and then impact energy of drilling fluid is converted into electric energy in the tool, and the electric energy is stored by the energy storage capacitor. In the salvaging process, the electric welding machine is started by pushing the push rod through the falling object, and the falling object and the salvaging tool are welded into a whole through the welding electrode by the electric welding machine, so that the electric welding machine is salvaged, the problem that the existing salvaging tool and the falling object are combined with each other in a weak manner by means of friction force is effectively solved, and the success rate of salvaging the falling object underground is improved. The welded underground fishing tool can be suitable for fishing junks with different diameters by replacing the fishing head.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at A;
fig. 3 is an enlarged schematic view of the structure at B in fig. 1.
In the figure: 1. the power generation device comprises an upper joint, 2, an outer shell, 3, a turbine shaft, 4, a fishing head, 5, an electric welding machine, 6, an energy storage capacitor, 7, a main shaft, 8, a rectifier, 9, an electrode insulating pad, 10, a welding electrode, 11, a thrust bearing, 12, a turbine component, 13, a main shaft bearing, 14, a sealing baffle, 15, a liquid discharge hole, 16, a power generation rotor, 17, a power generation rotor magnetic pole, 18, a power generation stator, 19, a starting switch, 20, an installation seat, 21, a push rod, 22, a protective cover, 23, a spring, 24, a welding electrode notch, 25, an electrode socket, 26, a plug, 27 and a shaft sleeve.
Detailed Description
The welding type downhole fishing tool consists of an upper joint 1, an outer shell 2, a turbine shaft 3, a fishing head 4, an electric welding machine 5, an energy storage capacitor 6, a main shaft 7 and a rectifier 8, wherein the upper joint 1 is arranged on the top thread of the outer shell 2, the fishing head 4 is arranged on the bottom thread of the outer shell 2, and the fishing head 4 is a cylindrical body with a horn mouth; the inner wall of the fishing head 4 is fixedly provided with a welding electrode 10 through an electrode insulating pad 9.
The turbine shaft 3 is installed in the outer shell 2 adjacent to the upper joint 1 through the thrust bearing 11, a turbine assembly 12 is arranged between the turbine shaft 3 and the outer shell 2, and the turbine assembly 12 is composed of a turbine stator fixedly installed on the inner wall of the outer shell 2 and a turbine rotor fixedly installed on the turbine shaft 3. The bottom end of the turbine shaft 3 is provided with a sealing baffle 14, and the sealing baffle 14 is in sliding sealing connection with the inner wall of the outer shell 2; a drain hole 15 is provided in the outer housing 2 above the sealing baffle 14.
The main shaft 7 is installed in the outer housing 2 below the turbine shaft 3 through symmetrically arranged main shaft bearings 13, and a shaft sleeve 27 is arranged between the main shaft bearings 13 and the main shaft 7. The main shaft 7 is fixedly connected with the turbine shaft 3, a power generation rotor 16 is arranged on the main shaft 7 between the main shaft bearings 13, a power generation rotor magnetic pole 17 is wrapped on the surface of the power generation rotor 16, and a power generation stator 18 is fixedly arranged on the inner wall of the outer shell 2 corresponding to the power generation rotor magnetic pole 17.
The rectifier 8, the energy storage capacitor 6 and the electric welding machine 5 are sequentially installed in the outer shell 2 below the main shaft 7, the power generation stator 18, the rectifier 8, the energy storage capacitor 6 and the electric welding machine 5 are sequentially connected in series (the rectifier 8, the energy storage capacitor 6 and the electric welding machine 5 are standard components, the model of the rectifier 8 is MDQ100A12V, the model of the energy storage capacitor 6 is NIPPON-16V-33000Uf, and the model of the electric welding machine 5 is NY-D01+P200A).
The bottom of electric welding machine 5 is provided with start switch 19, and the shell body 2 of electric welding machine 5 below is interior to be equipped with mount pad 20 admittedly, and mount pad 20 is the T shape body, is provided with the centre bore on the mount pad 20, and movable mounting has ejector pin 21 in the centre bore, and ejector pin 21 is the T shape body. One end of the ejector rod 21 extends to the upper side of the mounting seat 20, the ejector rod 21 extending to the upper side of the mounting seat 20 is in intermittent contact connection with the starting switch 19, and the other end of the ejector rod 21 extends to the lower side of the mounting seat 20.
A protective cover 22 is arranged in the salvage head 4 below the ejector rod 21 to prevent sediment from entering the salvage head 4 when not in operation; the protective cover 22 is connected with the mounting seat 20 through a spring 23, and a welding electrode between the protective cover and the mounting seat is electrically and electrically connected. The protective cap 22 is provided with a welding electrode notch 24 along the edge. The protective cover 22 is intermittently connected in contact with the jack 21 extending below the mount 20.
The top edge of the installation seat 20 at the periphery of the central hole of the installation seat 20 of the welding type downhole fishing tool is provided with an assembly hole, an electrode socket 25 is arranged in the assembly hole, the electrode socket 25 is connected with the electric welding machine 5 through a wire, and the welding electrode 10 is movably connected with the electrode socket 25 through a wire and a plug 26.
When the welding type downhole fishing tool works, drilling fluid enters from the upper joint 1, and the entering drilling fluid impacts the turbine assembly 12 so as to drive the turbine shaft 3 to rotate; drilling fluid completing the impact turbine assembly 12 is discharged through the drain 15 into the annulus between the fishing tool and the borehole.
The rotation of the turbine shaft 3 drives the main shaft 7 to rotate, so that the power generation rotor magnetic poles 17 rotate relative to the power generation stator 18 to generate current (alternating current), and the generated current is converted into direct current through the rectifier and then enters the energy storage capacitor 6 to be stored, so that necessary electric energy is provided for the electric welding machine 5 during working. The energy storage capacitor 6 can amplify the current instantaneously to prevent the problem that the current generated by the electric rotor magnetic pole 17 relative to the power generation stator 18 is too small to provide a large amount of power required by the operation of the welding machine 5.
Continuing to integrally lower the fishing tool; when the protective cover 22 contacts with the underground rod-shaped metal drop to be salvaged (such as broken drill rod), the metal drop to be salvaged pushes the protective cover 22 into the salvaging head 4, and in the process, the protective cover 22 ascends and gradually contacts with the ejector rod 21 extending to the lower part of the mounting seat 20, so that the ejector rod 21 is pushed to ascend; the upward ejector rod 21 gradually moves up to the starting switch 19 to start the electric welding machine 5, the welding electrode 10 gradually extends out of the welding electrode notch 24 while the protective cover 22 moves up, the extending welding electrode 10 contacts with the metal falling object to be salvaged and is welded with the metal falling object to be salvaged, an integral body is formed, and the salvaging work of the metal falling object to be salvaged can be completed by integrally lifting the salvaging tool.
The salvaging tool pushes the protective cover 22 and the push rod 21 to start the electric welding machine 5 through the junk to be salvaged, and the electric welding machine 5 welds the junk and the salvaging tool into a whole through the welding electrode 10, so that the salvaging tool is salvaged, the problem that the existing salvaging tool and the junk are combined with each other in a weak manner by means of friction force is effectively solved, and the success rate of salvaging the junk in the pit is improved. The salvaging head 4 of the salvaging tool is used as a wearing piece, and a new salvaging head 4 needs to be replaced after each salvaging is completed; by replacing the salvaging head 4, the salvaging device can be suitable for salvaging junks with different diameters.
Claims (1)
1. The utility model provides a welded type downhole fishing tool, it comprises top connection (1), shell body (2), turbine shaft (3), fishing head (4), electric welding machine (5), energy storage capacitor (6), main shaft (7) and rectifier (8), top screw thread of shell body (2) installs top connection (1), bottom screw thread of shell body (2) installs fishing head (4), fishing head (4) are horn mouth's tubular body; the method is characterized in that: a turbine shaft (3) is installed in an outer shell (2) close to the upper joint (1) through a thrust bearing (11), a turbine component (12) is arranged between the turbine shaft (3) and the outer shell (2), a main shaft (7) is installed in the outer shell (2) below the turbine shaft (3) through symmetrically arranged main shaft bearings (13), the main shaft (7) is fixedly connected with the turbine shaft (3), a power generation rotor (16) is arranged on the main shaft (7) between the main shaft bearings (13), power generation rotor magnetic poles (17) are wrapped on the surface of the power generation rotor (16), and a power generation stator (18) is fixedly arranged on the inner wall of the outer shell (2) corresponding to the power generation rotor magnetic poles (17); a rectifier (8), an energy storage capacitor (6) and an electric welding machine (5) are sequentially arranged in the outer shell (2) below the main shaft (7), and a power generation stator (18), the rectifier (8), the energy storage capacitor (6) and the electric welding machine (5) are sequentially connected in series; the bottom of the electric welding machine (5) is provided with a starting switch (19), an installation seat (20) is fixedly arranged in an outer shell (2) below the electric welding machine (5), a push rod (21) is arranged on the installation seat (20), the push rod (21) is a T-shaped body, the push rod (21) is in intermittent contact connection with the starting switch (19), a protective cover (22) is arranged below the push rod (21), the protective cover (22) is connected with the installation seat (20) through a spring (23), a welding electrode (10) is fixedly arranged on the inner wall of a fishing head (4) between the protective cover (22) and the installation seat (20) through an electrode insulating pad (9), and the welding electrode (10) is electrically connected with the electric welding machine (5);
the mounting seat (20) is a T-shaped body, a central hole is formed in the mounting seat (20), a push rod (21) is movably mounted in the central hole, one end of the push rod (21) extends to the upper side of the mounting seat (20), and the other end of the push rod (21) extends to the lower side of the mounting seat (20);
the top edge of the mounting seat (20) at the periphery of the central hole is provided with an assembly hole, an electrode socket (25) is arranged in the assembly hole, the electrode socket (25) is connected with the electric welding machine (5) through a wire, and the welding electrode (10) is connected with the electrode socket (25) through a wire and a plug (26);
the edge of the protective cover (22) is provided with a welding electrode notch (24);
the bottom end of the turbine shaft (3) is provided with a sealing baffle plate (14), and the sealing baffle plate (14) is in sliding sealing connection with the outer shell (2);
a liquid discharge hole (15) is formed in the outer shell (2) above the sealing baffle (14);
a shaft sleeve (27) is arranged between the main shaft bearing (13) and the main shaft (7);
when the protective cover (22) is in contact with the underground rod-shaped metal falling object to be salvaged, the metal falling object to be salvaged pushes the protective cover (22) to enter the salvaging head (4), and in the process, the protective cover (22) is upward and gradually contacted with the ejector rod (21) extending to the lower part of the mounting seat (20), so that the ejector rod (21) is pushed upward; the upward ejector rod (21) is gradually contacted with the starting switch (19) so as to start the electric welding machine (5) to work, the welding electrode (10) is gradually extended out of the welding electrode notch (24) while the protective cover (22) is upward, the extended welding electrode (10) is contacted with the metal falling object to be salvaged, thereby being welded with the metal falling object to be salvaged to form a whole, and the salvaging work of the metal falling object to be salvaged can be completed by integrally lifting the salvaging tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810793499.4A CN108756800B (en) | 2018-07-19 | 2018-07-19 | Welding type downhole fishing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810793499.4A CN108756800B (en) | 2018-07-19 | 2018-07-19 | Welding type downhole fishing tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108756800A CN108756800A (en) | 2018-11-06 |
| CN108756800B true CN108756800B (en) | 2023-09-22 |
Family
ID=63970369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810793499.4A Active CN108756800B (en) | 2018-07-19 | 2018-07-19 | Welding type downhole fishing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108756800B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109736776B (en) * | 2019-01-29 | 2023-10-13 | 中国石油集团川庆钻探工程有限公司 | Trap for well testing instrument |
| CN113047799B (en) * | 2021-05-21 | 2023-03-14 | 长江大学 | Explosive type sleeve pipe shaping tool |
| US11840901B2 (en) | 2022-02-24 | 2023-12-12 | Saudi Arabian Oil Company | Fishing welding tool |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202545098U (en) * | 2012-03-19 | 2012-11-21 | 中国石油天然气集团公司 | Downhole turbine generator system |
| CN202611645U (en) * | 2012-06-01 | 2012-12-19 | 中国海洋石油总公司 | Electromagnetic fishing device for drilling well and powered by underground turbine generator |
| CN204804734U (en) * | 2015-04-04 | 2015-11-25 | 彭海吉 | A section of thick bamboo is salvaged to smallclothes junk |
| CN105452594A (en) * | 2013-06-12 | 2016-03-30 | 瓦斯菲·阿希达法特 | Compact fishing apparatus |
| CN106368639A (en) * | 2016-09-21 | 2017-02-01 | 中国石油集团渤海钻探工程有限公司 | Fishing tool of turbine generator of logging-while-drilling instrument |
| WO2017158573A1 (en) * | 2016-03-17 | 2017-09-21 | Gearpower Group Ltd | A gear system |
| CN208502710U (en) * | 2018-07-19 | 2019-02-15 | 长江大学 | A kind of welded type underground fishing tool |
-
2018
- 2018-07-19 CN CN201810793499.4A patent/CN108756800B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202545098U (en) * | 2012-03-19 | 2012-11-21 | 中国石油天然气集团公司 | Downhole turbine generator system |
| CN202611645U (en) * | 2012-06-01 | 2012-12-19 | 中国海洋石油总公司 | Electromagnetic fishing device for drilling well and powered by underground turbine generator |
| CN105452594A (en) * | 2013-06-12 | 2016-03-30 | 瓦斯菲·阿希达法特 | Compact fishing apparatus |
| CN204804734U (en) * | 2015-04-04 | 2015-11-25 | 彭海吉 | A section of thick bamboo is salvaged to smallclothes junk |
| WO2017158573A1 (en) * | 2016-03-17 | 2017-09-21 | Gearpower Group Ltd | A gear system |
| CN106368639A (en) * | 2016-09-21 | 2017-02-01 | 中国石油集团渤海钻探工程有限公司 | Fishing tool of turbine generator of logging-while-drilling instrument |
| CN208502710U (en) * | 2018-07-19 | 2019-02-15 | 长江大学 | A kind of welded type underground fishing tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108756800A (en) | 2018-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108756800B (en) | Welding type downhole fishing tool | |
| CN102619484B (en) | Well wall coring while drilling tool | |
| CN208502710U (en) | A kind of welded type underground fishing tool | |
| CA2959123C (en) | Electrochemical well pipe cutting instrument | |
| CN105422048A (en) | Separate injection well immovable tubular column mechanical-electrical integration scale removing system and method | |
| CN111119739A (en) | High-voltage pulse drill bit and rock breaking experimental device | |
| CN206513346U (en) | Novel down-hole electronic controlled power is switched | |
| CN117108228B (en) | Geological investigation coring device and coring method | |
| CN2883658Y (en) | Downhole broken articles catch sleeve | |
| CN202611639U (en) | Tool for coring along with drilling well wall | |
| CN209817993U (en) | Drilling coring and core plugging alarm device | |
| CN111379547B (en) | Energy collecting rod pushing assembly, energy collecting rod pushing device and controllable shock wave generator | |
| CN214667762U (en) | Engineering geology sampling device | |
| CN202970581U (en) | Salvaging device of cables under oil well | |
| CN203515427U (en) | Retractable tubular dropping object fishing device for downhole operation | |
| CN212988899U (en) | Improved generation groundwater sampling device | |
| CN112343500A (en) | Combined drilling tool for breaking rock by impact voltage for improving mechanical drilling speed of hard formation | |
| CN105370244A (en) | Separate water injection well immovable pipe string electromechanical scale removing instrument | |
| CN108843266B (en) | Drilling fisher and method | |
| CN2271610Y (en) | Well electrospark explosion device | |
| CN102852476B (en) | Down-hole stretching tool | |
| CN220036638U (en) | Rotatory cogongrass of salvaging | |
| CN211524749U (en) | Unhooking-proof underground cable fishing tool | |
| CN204754850U (en) | Sucker rod socket in oil pipe | |
| CN216881810U (en) | Electronic commutator processing equipment |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |