CN110836101B - Oil well fishing device - Google Patents
Oil well fishing device Download PDFInfo
- Publication number
- CN110836101B CN110836101B CN201911250711.3A CN201911250711A CN110836101B CN 110836101 B CN110836101 B CN 110836101B CN 201911250711 A CN201911250711 A CN 201911250711A CN 110836101 B CN110836101 B CN 110836101B
- Authority
- CN
- China
- Prior art keywords
- salvaging
- electromagnetic
- oil well
- piece
- cable
- 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
- 239000003129 oil well Substances 0.000 title claims abstract description 41
- 230000001681 protective effect Effects 0.000 claims abstract description 37
- 230000005674 electromagnetic induction Effects 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000012212 insulator Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
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)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses an oil well salvaging device, which comprises a supporting frame arranged at a wellhead, wherein a control box body is fixedly arranged on the supporting frame, a motor and a control circuit are respectively arranged in the control box body, the output end of the motor is connected with a cable, the bottom of the cable is connected with a salvaging body, a hook-shaped salvaging piece and an electromagnetic salvaging piece are respectively arranged on the salvaging body, the control circuit controls the on or off of the electromagnetic salvaging piece, and the oil well salvaging device further comprises a protective sleeve which is arranged in a manner of relatively moving with the salvaging body, and the protective sleeve moves up and down along the oil well through a driving assembly so as to expose or cover the salvaging body. According to the invention, by designing the self-contained driving protection structure of the salvaging equipment, the damage to the oil well equipment can be reduced while the damage to the pipe wall caused by scratch and impact of sundries and falling again can be effectively avoided.
Description
Technical Field
The invention relates to oil well junk salvaging equipment, in particular to an oil well salvaging device.
Background
In the oil gas development production process, working tools or sundries often fall into an oil well, the oil well production is easy to stop, and even the oil well is scrapped when serious, so that the junk is required to be salvaged by salvaging equipment.
The existing salvaging equipment generally adsorbs or hooks the falling body through a strong magnet or a hook which is lowered into a shaft, so that the falling body is salvaged back to the ground, and the salvaging purpose is realized. However, the existing fishing tool lacks the protection of the fished object in the fishing operation process, and can easily scratch the pipe wall no matter the fished object is, or the fishing equipment is, so that the fished object is easy to fall again due to scratch, the collision to an oil well cannot be avoided, the fishing efficiency is reduced, and even damage to oil well equipment is caused.
In view of the above, there is a need for a new salvaging device with safer structural design and effectively improved operation efficiency.
Disclosure of Invention
The invention aims to solve the technical problem that the existing oil well salvage equipment lacks a safe and stable protection structure.
In order to solve the technical problems, the technical scheme adopted by the invention is to provide the oil well salvaging device, which comprises a supporting frame arranged at a wellhead, wherein a control box body is fixedly arranged on the supporting frame, a motor and a control circuit for paying off and taking up are respectively arranged in the control box body, the output end of the motor is downwards penetrated outside the control box body and connected with a cable, a cable is arranged in the cable, the bottom of the cable is connected with a salvaging body, the salvaging body is controlled by the motor to move and lift in an oil well, a hook-shaped salvaging piece and an electromagnetic salvaging piece are respectively arranged on the salvaging body, the electromagnetic salvaging piece is connected with the control circuit through the cable, the control circuit controls the on or off of the electromagnetic salvaging piece, and the oil well salvaging device further comprises a protective sleeve which is arranged in a relatively moving mode with the salvaging body, and the protective sleeve moves up and down along the oil well through a driving assembly so as to expose or cover the salvaging body.
In the above scheme, the drive assembly is including connecting in the protective sheath with vice cable between the control box, be equipped with in the control box and be used for unwrapping wire and receipts line vice motor, vice motor's output wear to locate downwards the control box is external and connect in vice cable, be equipped with the magnetosensitive element on the inside wall of protective sheath, the magnetosensitive element orientation electromagnetic salvage piece is arranged, and follows the switch-on or the switch-off of electromagnetic salvage piece, electromagnetic salvage piece adsorbs or loosens the magnetosensitive element.
In the scheme, the number of the auxiliary cables is two, and the auxiliary cables are respectively and symmetrically arranged left and right.
In the above scheme, the control box body is provided with an auxiliary motor switch, and the auxiliary motor switch is connected with the control circuit through a wire.
In the above scheme, the drive assembly include vertical arrange in slide on the electromagnetism fishing member, the upper and lower both ends of slide are equipped with an electromagnetic induction component respectively, electromagnetic induction component passes through cable junction in control circuit, be equipped with the magneto element on the inside wall of protective sheath, the magneto element embedded and sliding connection in slide, be equipped with inductive switch on the control box, inductive switch with control circuit passes through wire connection, control circuit controls respectively electromagnetic induction component opens and close, and makes the magneto element drives the protective sheath is directed to arbitrary electromagnetic induction component vertical movement.
In the above scheme, the magnetic sensor is made of steel, and the electromagnetic sensor is an electromagnet.
In the scheme, the electromagnetic switch and the motor switch are respectively arranged on the control box body and are respectively connected with the control circuit through wires.
In the above scheme, the electromagnetic salvage piece is an electromagnet.
In the above scheme, the shape of the protective sleeve is a straight cylinder or a cylinder with a small upper part and a large lower part and matched with the shape of the salvaging body.
In the above scheme, the protective sleeve is an insulator and is an insulating magnet.
According to the invention, by designing the self-contained driving protection structure of the salvaging equipment, the damage to the oil well equipment can be reduced while the damage to the pipe wall caused by scratch and impact of sundries and falling again can be effectively avoided.
Drawings
FIG. 1 is a schematic external view of a first embodiment of the present invention;
FIG. 2 is a perspective view of the internal structure of FIG. 1;
FIG. 3 is a diagram showing the usage status of the first embodiment of the present invention;
FIG. 4 is a schematic external view of a second embodiment of the present invention;
FIG. 5 is a perspective view of the internal structure of FIG. 4;
Fig. 6 is a usage state change diagram of a second embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The invention discloses an oil well salvaging device, and a person skilled in the art can properly improve the technological parameters by referring to the content of the invention. It is to be particularly pointed out that all similar substitutes and modifications apparent to those skilled in the art are deemed to be included in the invention and that the relevant person can make modifications and appropriate alterations and combinations of what is described herein to make and use the technology without departing from the spirit and scope of the invention.
In the present invention, unless otherwise indicated, scientific and technical terms used herein have the meanings commonly understood by one of ordinary skill in the art.
As shown in fig. 1 to 6, the oil well salvaging device provided by the invention comprises a supporting frame 1 arranged at a wellhead, wherein a control box body 2 is fixedly arranged on the supporting frame 1, a motor and a control circuit for paying off and taking up are respectively arranged in the control box body 2, the output end of the motor is downwards penetrated outside the control box body 2 and is sequentially connected with a cable 3 and a salvaging body 4, a motor switch is arranged on the control box body 2, the motor switch is connected with the control circuit through a wire, and when the oil well salvaging device is used, the control circuit drives the motor to operate to drive the cable 3 to stretch and retract, so that the salvaging body 4 moves and lifts in an oil well to salvage a falling object, the control box body 2 is provided with control buttons of corresponding parts, and the control buttons achieve the purpose of electric control through the wire connection control circuit.
In the invention, the motor and the electric wires are more conventional connecting elements, and the installation, penetrating and layout modes of the electric wires among all the parts are simpler and more common, so the motor and the electric wires do not serve as core innovation points of the motor and the electric wires are needed by means of related technologies, and in order to avoid confusion caused by circuit diagrams, the connection diagrams of the wire groups among all the parts and the motor schematic diagrams are omitted in the figures.
Further, the cable 3 is internally provided with a cable, the fishing body 4 is respectively provided with a hook-shaped fishing piece 5 and an electromagnetic fishing piece 6 in a protruding mode, the electromagnetic fishing piece 6 is an electromagnet, the hook-shaped fishing piece 5 and the electromagnetic fishing piece 6 are of a relatively mature prior art, and can be used independently or comprehensively, so that the fishing function can be flexibly realized by adopting the related technology, the electromagnetic fishing piece 6 is connected to a control circuit through the cable, an electromagnetic switch is arranged on the control box body 2, and the electromagnetic switch is connected with the control circuit through a wire, so that the control circuit can be operated to control the connection or disconnection of the electromagnetic fishing piece 6 to adsorb the fished objects.
In addition, the invention also comprises a protective sleeve 7 which is arranged in a moving way relative to the salvage body 4, wherein the protective sleeve 7 is preferably made of an insulator and a magnet insulation body, the shape of the protective sleeve 7 can be a straight cylinder (with larger volume), the protective sleeve 7 can also be a cylinder with a small upper part and a large lower part and is matched with the shape of the salvage body 4 (with small space), the protective sleeve 7 can be selected according to practical situations, and is arranged between the salvage body 4 and the inner wall of an oil well, so that the maximum outer diameter of the protective sleeve 7 is smaller than the inner diameter of the oil well and is larger than the outer diameter of the salvage body 4, the protective sleeve 7 can move up and down along the direction of the oil well under the driving of a driving assembly so as to expose or cover the salvage body 4, for example, the protective sleeve 7 can expose the salvage body 4 so as not to prevent salvage from interfering with salvage operation when lifting and lowering, the protective sleeve 7 can cover the salvage body 4, not only prevent friction collision between junk and the oil well pipeline, but also can prevent the junk from falling again due to collision.
The driving structure in the invention is divided into the following two implementation modes:
Example 1
As shown in fig. 1 to 3, the specific auxiliary cable 8 connected between the protective sleeve 7 and the control box 2 is included in the first driving structure, the auxiliary cable 8 is two and is symmetrically arranged respectively, so that the balance of stress when the protective sleeve 7 is lifted by the auxiliary cable 8 is maintained, an auxiliary motor used for paying off and winding up is arranged in the control box 2, the output end of the auxiliary motor penetrates out of the control box 2 downwards, the auxiliary cable 8 is connected to realize the transmission output of lifting power, the control box 2 is provided with an auxiliary motor switch, the auxiliary motor switch is connected with a control circuit through an electric wire, manual control can be realized, and therefore, along with forward and reverse running of the auxiliary motor, the protective sleeve 7 can be driven to lift in the arrow direction in the figure, in this embodiment, as a further preferred design, a magnetic sensor 9 can be fixedly embedded on the inner side wall of the protective sleeve 7, the magnetic sensor 9 can be selected as steel material, and the magnetic sensor 9 is inwards arranged towards the direction of the electromagnetic fishing member 6, so that the electromagnetic fishing member 6 is conducted or disconnected, the electromagnetic fishing member 6 can automatically adsorb the main fishing member 9 or the magnetic sensor 9 can be automatically adsorbed by the electromagnetic fishing member 6 or the electromagnetic fishing member 9 can be prevented from being scratched, and the misplaced magnetic sensor can be avoided in the process of the two-and the lifting and misplaced protective sleeve 4 can be avoided.
Example 2
As shown in fig. 4 to 6, the second driving structure specifically includes a slide 10 vertically provided on the electromagnetic fishing member 6, an electromagnetic induction element is embedded at the upper and lower ends of the slide 10, the electromagnetic induction element is preferably an electromagnet, the electromagnetic induction element is connected to a control circuit through a cable, a magnetic induction element 9 can be fixedly embedded on the inner side wall of the protective sleeve 7, the magnetic induction element 9 is preferably made of steel, the shape of the magnetic induction element 9 is designed to be adapted to a slider shape embedded in the slide 10 and can slide vertically along the slide 10, an induction switch is provided on the control box 2, the induction switch is connected with the control circuit through a wire, the control circuit controls the electromagnetic induction element to be opened and closed, so that the required electromagnetic induction element generates magnetic attraction and drives the magnetic induction element 9 to move up and down to two high and low limit positions, and then is firmly sucked, thus, the magnetic induction element 9 can drive the protective sleeve 7 to move vertically towards any electromagnetic induction element along the arrow direction in the figure.
According to the invention, by designing the self-contained driving protection structure of the salvaging equipment, the damage to the oil well equipment can be reduced while the damage to the pipe wall caused by scratch and impact of sundries and falling again can be effectively avoided.
The present invention is not limited to the above-mentioned preferred embodiments, and any person who can learn about the structural changes made under the teaching of the present invention can be within the scope of the present invention if the present invention has the same or similar technical solutions.
Claims (7)
1. The oil well salvaging device is characterized by comprising a supporting frame arranged at a wellhead, wherein a control box body is fixedly arranged on the supporting frame, a motor and a control circuit for paying off and taking up are respectively arranged in the control box body, the output end of the motor is downwards penetrated out of the control box body and is connected with a cable, a cable is arranged in the cable, the bottom of the cable is connected with a salvaging body, the salvaging body is controlled by the motor to move and lift in an oil well, a hook-shaped salvaging piece and an electromagnetic salvaging piece are respectively arranged on the salvaging body, the electromagnetic salvaging piece is connected with the control circuit through the cable, the control circuit controls the on or off of the electromagnetic salvaging piece, the oil well salvaging device further comprises a protective sleeve which is arranged in a relatively moving manner with the salvaging body, and the protective sleeve moves up and down along the oil well through a driving component so as to expose or cover the salvaging body; the driving assembly comprises an auxiliary cable connected between the protective sleeve and the control box body, an auxiliary motor used for paying off and taking up wires is arranged in the control box body, the output end of the auxiliary motor is downwards arranged outside the control box body in a penetrating mode and connected with the auxiliary cable, a magneto sensor is arranged on the inner side wall of the protective sleeve and faces to the electromagnetic salvage piece, and the magneto sensor is connected or disconnected with the electromagnetic salvage piece, and the electromagnetic salvage piece adsorbs or loosens the magneto sensor; the electromagnetic salvage piece is an electromagnet; the protective sleeve is an insulator and is an insulating magnet.
2. An oil well fishing device as defined in claim 1, wherein said secondary cables are arranged in two and side-to-side symmetry.
3. The oil well salvaging device as set forth in claim 1, wherein said control box is provided with a secondary motor switch, said secondary motor switch being connected to said control circuit by a wire.
4. The oil well salvaging device as set forth in claim 1, wherein said control box is provided with an electromagnetic switch and a motor switch, respectively, said electromagnetic switch and motor switch being connected with said control circuit by electric wires, respectively.
5. An oil well fishing device as defined in claim 1, wherein said protective sleeve is in the shape of a straight cylinder or a cylinder with a small upper part and a large lower part adapted to the outer shape of said fishing body.
6. The oil well salvaging device is characterized by comprising a supporting frame arranged at a wellhead, wherein a control box body is fixedly arranged on the supporting frame, a motor and a control circuit for paying off and taking up are respectively arranged in the control box body, the output end of the motor is downwards penetrated out of the control box body and is connected with a cable, a cable is arranged in the cable, the bottom of the cable is connected with a salvaging body, the salvaging body is controlled by the motor to move and lift in an oil well, a hook-shaped salvaging piece and an electromagnetic salvaging piece are respectively arranged on the salvaging body, the electromagnetic salvaging piece is connected with the control circuit through the cable, the control circuit controls the on or off of the electromagnetic salvaging piece, the oil well salvaging device further comprises a protective sleeve which is arranged in a relatively moving manner with the salvaging body, and the protective sleeve moves up and down along the oil well through a driving component so as to expose or cover the salvaging body; the driving assembly comprises a slideway vertically arranged on the electromagnetic salvaging piece, the upper end and the lower end of the slideway are respectively provided with an electromagnetic induction element, the electromagnetic induction elements are connected to the control circuit through cables, the inner side wall of the protective sleeve is provided with a magneto-sensitive element, the magneto-sensitive element is embedded and is connected to the slideway in a sliding manner, the control box body is provided with an induction switch, the induction switch is connected with the control circuit through wires, the control circuit respectively controls the opening and the closing of the electromagnetic induction elements, and the magneto-sensitive element drives the protective sleeve to vertically move towards any one electromagnetic induction element; the electromagnetic salvage piece is an electromagnet; the protective sleeve is an insulator and is an insulating magnet.
7. The oil well fishing device as defined in claim 6, wherein the magnetic sensor is made of steel and the electromagnetic sensor is an electromagnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911250711.3A CN110836101B (en) | 2019-12-09 | 2019-12-09 | Oil well fishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911250711.3A CN110836101B (en) | 2019-12-09 | 2019-12-09 | Oil well fishing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110836101A CN110836101A (en) | 2020-02-25 |
| CN110836101B true CN110836101B (en) | 2024-05-07 |
Family
ID=69578350
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911250711.3A Active CN110836101B (en) | 2019-12-09 | 2019-12-09 | Oil well fishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110836101B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577190A (en) * | 2020-04-23 | 2020-08-25 | 王水波 | Oil well foreign matter active protection type fishing equipment |
| US11236585B2 (en) | 2020-06-17 | 2022-02-01 | Saudi Arabian Oil Company | Electromagnetic wellbore clean out tool |
| NL2030627B1 (en) * | 2022-01-20 | 2022-12-05 | Univ Southwest Petroleum | Intelligent electromagnetic fishing device for horizontal wells |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU581240A1 (en) * | 1974-01-15 | 1977-11-25 | Всесоюзный научно-исследовательский институт разработки и эксплуатации нефтепромысловых труб | Device for retrieving broken wire-hose line from borehole |
| US4856582A (en) * | 1988-07-20 | 1989-08-15 | Atlantic Richfield Company | Motorized wellbore fishing tool |
| RU94219U1 (en) * | 2010-03-15 | 2010-05-20 | Общество с ограниченной ответственностью "Научно-производственное предприятие "ЭГО" | DEVICE FOR DETERMINING THE LENGTH AND ANGLE OF THE TILES OF THE TELESCOPIC ARROW OF THE LOADING MACHINE |
| CN103573204A (en) * | 2013-10-24 | 2014-02-12 | 中国石油化工股份有限公司 | Fallen steel wire fisher passing through tapered string |
| CN104612618A (en) * | 2015-01-26 | 2015-05-13 | 成都科盛石油科技有限公司 | Oil well fisher |
| CN204960856U (en) * | 2015-09-01 | 2016-01-13 | 中国石油集团长城钻探工程有限公司 | Strong magnetism fisher of triaxial |
| CN105370232A (en) * | 2015-12-17 | 2016-03-02 | 李刚 | Fallen rope fishing device |
| CN107152255A (en) * | 2017-06-30 | 2017-09-12 | 四川达灿石油设备有限公司 | The pneumatic oil well of drawing and pulling type salvages structure |
| CN207332800U (en) * | 2017-09-25 | 2018-05-08 | 中国石油天然气股份有限公司 | Oil well fishing device |
| 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 |
| CN208885225U (en) * | 2018-09-30 | 2019-05-21 | 东营天锦石油科技开发有限公司 | A kind of oil field well falling object fishing tool |
| CN211115885U (en) * | 2019-12-09 | 2020-07-28 | 中油（天津）国际石油勘探开发技术有限公司 | Oil well fishing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7357183B2 (en) * | 2005-09-09 | 2008-04-15 | Venturi Oil Tools | Magnetic fishing tool and method |
| CN104453766B (en) * | 2014-10-23 | 2017-06-27 | 北京海蓝科技开发有限责任公司 | Oil instrument salvages system and fishing head |
-
2019
- 2019-12-09 CN CN201911250711.3A patent/CN110836101B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU581240A1 (en) * | 1974-01-15 | 1977-11-25 | Всесоюзный научно-исследовательский институт разработки и эксплуатации нефтепромысловых труб | Device for retrieving broken wire-hose line from borehole |
| US4856582A (en) * | 1988-07-20 | 1989-08-15 | Atlantic Richfield Company | Motorized wellbore fishing tool |
| RU94219U1 (en) * | 2010-03-15 | 2010-05-20 | Общество с ограниченной ответственностью "Научно-производственное предприятие "ЭГО" | DEVICE FOR DETERMINING THE LENGTH AND ANGLE OF THE TILES OF THE TELESCOPIC ARROW OF THE LOADING MACHINE |
| CN103573204A (en) * | 2013-10-24 | 2014-02-12 | 中国石油化工股份有限公司 | Fallen steel wire fisher passing through tapered string |
| CN104612618A (en) * | 2015-01-26 | 2015-05-13 | 成都科盛石油科技有限公司 | Oil well fisher |
| CN204960856U (en) * | 2015-09-01 | 2016-01-13 | 中国石油集团长城钻探工程有限公司 | Strong magnetism fisher of triaxial |
| CN105370232A (en) * | 2015-12-17 | 2016-03-02 | 李刚 | Fallen rope fishing device |
| CN107152255A (en) * | 2017-06-30 | 2017-09-12 | 四川达灿石油设备有限公司 | The pneumatic oil well of drawing and pulling type salvages structure |
| CN207332800U (en) * | 2017-09-25 | 2018-05-08 | 中国石油天然气股份有限公司 | Oil well fishing device |
| 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 |
| CN208885225U (en) * | 2018-09-30 | 2019-05-21 | 东营天锦石油科技开发有限公司 | A kind of oil field well falling object fishing tool |
| CN211115885U (en) * | 2019-12-09 | 2020-07-28 | 中油（天津）国际石油勘探开发技术有限公司 | Oil well fishing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110836101A (en) | 2020-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110836101B (en) | Oil well fishing device | |
| CN205558622U (en) | A overhead door mechanism for box -type substation | |
| CN105121326B (en) | Crane | |
| CN211115885U (en) | Oil well fishing device | |
| CN202202645U (en) | Electromagnet bolt | |
| CN201581929U (en) | Lifting partition door of subway | |
| CN104747225A (en) | Lifting air door interactive-linkage device | |
| CN207307289U (en) | A kind of dense multilevel charging gear of rack flocculant | |
| CN111173946A (en) | Gate valve | |
| CN207368506U (en) | A kind of bi-directional door easy care distribution box | |
| CN110834705B (en) | Submarine cable grabbing device and cable grabbing method | |
| CN201647871U (en) | Mobile cable installation provided with steel wire rope breakage monitoring device | |
| CN110342376B (en) | Safe speed-control sightseeing descending channel based on Lenz law and control method thereof | |
| CN203594395U (en) | Fishing device with internally-arranged camera and special for cable in gas well | |
| CN209177904U (en) | A kind of redundancy structure steel-wire rope type electric block | |
| CN209070053U (en) | A kind of detection device for wire and cable | |
| CN214336485U (en) | Transformer with alarming function | |
| CN109179059B (en) | Convenient type transportation loading attachment is used to cable strand wires machine | |
| CN215166010U (en) | Permanent magnetism jack-up suction sucking disc quick change device that excavator front end was used | |
| JP2018125954A (en) | Switch gear with lifting function | |
| CN200951919Y (en) | Balance hammer lifting machine with preventing tail rop twisting apparatus | |
| CN108996417A (en) | A kind of redundancy structure steel-wire rope type electric block | |
| CN217627338U (en) | Winch rope guide frame and control circuit thereof | |
| CN211971611U (en) | Automatic change mechanical equipment hoisting accessory | |
| CN210272227U (en) | Breaker switch operating device for transformer pile head box |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201202 Address after: 300457 Tianjin Binhai New Area Development Zone Second Avenue 35 Ginza building 401 room Applicant after: CNPC (TIANJIN) INTERNATIONAL PETROLEUM EXPLORATION AND DEVELOPMENT TECHNOLOGY Co.,Ltd. Applicant after: PetroChina Company Limited Address before: 300457 Tianjin Binhai New Area Development Zone Second Avenue 35 Ginza building 401 room Applicant before: CNPC (TIANJIN) INTERNATIONAL PETROLEUM EXPLORATION AND DEVELOPMENT TECHNOLOGY Co.,Ltd. Applicant before: DAGANG OIL FIELD OF CNPC |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |