CN105649566A - Cone fisher - Google Patents
Cone fisher Download PDFInfo
- Publication number
- CN105649566A CN105649566A CN201610206440.1A CN201610206440A CN105649566A CN 105649566 A CN105649566 A CN 105649566A CN 201610206440 A CN201610206440 A CN 201610206440A CN 105649566 A CN105649566 A CN 105649566A
- Authority
- CN
- China
- Prior art keywords
- drilling rod
- ring
- gear
- block
- strengthening
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 claims abstract description 87
- 238000005728 strengthening Methods 0.000 claims description 63
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling 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
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Marine Sciences & Fisheries (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a cone fisher and relates to the field of drilling equipment. The cone fisher comprises a cylindrical drill pipe, wherein the drill pipe is sleeved with an overshot, one end of the overshot is fixedly connected with a baffle ring, and the other end is open; the baffle ring is rotationally connected with the drill pipe; a screw conveying blade is further fixedly connected onto the drill pipe, is located at the open end of the overshot and extends into the overshot. The cone fisher solves the technical problems of lack of a professional cone fishing tool and low efficiency of manual fishing in the prior art.
Description
Technical field
The present invention relates to drilling rigs field, especially relate to a kind of cone fisher.
Background technology
Tooth-wheel bit is most popular a kind of drilling bit. Cutting tooth when tooth-wheel bit works and alternately contact shaft bottom, broken rock moment of torsion is little, and cutting tooth and shaft bottom contact area are little, and specific pressure height, is easy to wedging stratum; Work edge total length is big, thus relatively reduces wear. Tooth-wheel bit can adapt to the multiple stratum from soft to hard.
Petroleum drilling and geological drilling apply maximum still tooth-wheel bit. Tooth-wheel bit has impact when rotated, crushes and the effect of shearing-crushing formation rock, so, tooth-wheel bit can adapt to soft, in, hard various stratum. Particularly after jet-type tooth-wheel bit and long nozzle tooth-wheel bit occur, the drilling speed of tooth-wheel bit improves greatly, is the once great revolution in tooth-wheel bit development history.
Tooth-wheel bit can be divided into milling tooth (steel-tooth) tooth-wheel bit, inserted (on gear wheel edge dress hard-metal insert) tooth-wheel bit by tooth type; Single-cone rotary drill bit, tricone bit and assembling multiple tri-cone rotary drill bit can be divided into by gear wheel number. Use at most both at home and abroad, the most generally tricone bit. Typical products tricone bit is the important tool of petroleum drilling, and the quality of its serviceability will directly affect drilling quality, drilling efficiency and drilling cost.
Carrying out in the process holed in use tooth-wheel bit, gear wheel is subject to great direction reactive force, and along with the use that drill bit is long-time, gear wheel easily comes off.
And lack now a kind of gear wheel fishing tool, the gear wheel come off or do not go to salvage, and or adopting artificial salvaging, and adopt artificial salvaging, in mud when gear wheel is mixed in boring, very difficult discovery, very consuming time, efficiency is very low.
Based on this, the present invention provides a kind of cone fisher to solve above-mentioned technical problem.
Summary of the invention
It is an object of the invention to provide a kind of cone fisher, to solve the gear wheel fishing tool lacking specialty in prior art, the inefficient technical problem of artificial salvaging.
Providing a kind of cone fisher in an embodiment of the present invention, described cone fisher comprises cylindrical drilling rod; It is set with oval socket outside described drilling rod; Described oval socket one end is connected with gear ring, the other end opening; Described gear ring and described drilling rod are rotationally connected;
Also being connected with spiral conveying blade on described drilling rod, described spiral conveying blade is positioned at described oval socket opening one end, and described spiral conveying blade stretches in described oval socket.
Optionally, described oval socket is cylindrical.
The oval socket of round shape is convenient to processing, and procedure of processing is simple, and tooling cost is low, also facilitates with described gear ring is fixing.
Optionally, being provided with the first strengthening ring between described gear ring and described drilling rod, described first strengthening ring and described gear ring connect admittedly, and described first strengthening ring and described drilling rod are rotationally connected.
Admittedly connecing by arranging the first strengthening ring and described drilling rod, be convenient to arrange rotation part, gear ring thickness is thinner, it is not easy to arrange rotation part.
Optionally, described gear ring deviates from described oval socket side and is also connected with polylith floor; Floor described in polylith is uniformly distributed around described drilling rod; Floor described in polylith all connects admittedly with described first strengthening ring; Floor described in polylith is all rotationally connected with described drilling rod.
Floor described in polylith play strengthen oval socket structural strength effect, it is possible to oval socket is played good fixed action, prevent oval socket enter boring in come off from drilling rod, impact salvaging.
Optionally, described drilling rod being also provided with the 2nd strengthening ring, floor described in polylith and described 2nd strengthening ring connect admittedly, and described 2nd strengthening ring and described drilling rod are rotationally connected.
Admittedly connecing by arranging the 2nd strengthening ring and described drilling rod, be convenient to arrange rotation part, floor is vertical with described drilling rod, it is not easy to arrange rotation part.
Optionally, described drilling rod being also connected with the first block and second gear block, described first block is positioned at described oval socket, with described first strengthening ring to connecing; Described second gear block is positioned at one end that described 2nd strengthening ring deviates from described oval socket, and described second gear block and described 2nd strengthening ring are to connecing.
By arranging described first block and described second gear block, it is convenient to fixing described first strengthening ring, the 2nd strengthening ring and floor and oval socket, prevents them from occurring bearing to jump in salvaging process.
Optionally, described first block and described second gear block all in annular, the rotation axle center of described first block and described second gear block and the rotation axle center conllinear of described drilling rod.
Described first strengthening ring and described 2nd strengthening ring, all in annular, can be kept out, it is possible to better prevent the axis of described first strengthening ring and described 2nd strengthening ring from jumping by described first block and described second gear block around described drilling rod one circle.
Optionally, it is connected with strengthening rib between described first block and described drilling rod; It is connected with strengthening rib between described second gear block and described drilling rod.
By arranging strengthening rib, it is to increase the barrier effect of described first block and described second gear block, it is to increase structural strength.
Optionally, described first strengthening ring and described 2nd strengthening ring are all rotationally connected by sealing bearing and described drilling rod.
Adopting bearing to be rotationally connected Technical comparing maturation, processing is simple, it may also be useful to convenient, rotates smooth. Can also using other rotating manner, the mode of such as slide rail and chute coupling, all in the protection domain of the application.
Optionally, described gear ring welds with described oval socket.
The mode of welding is fixed, and processing is simple, it is possible to effectively make gear ring and oval socket combine fixing.
Described cone fisher provided by the invention, described cone fisher comprises cylindrical drilling rod; It is set with oval socket outside described drilling rod; Described oval socket one end is connected with gear ring, the other end opening; Described gear ring and described drilling rod are rotationally connected; Also being connected with spiral conveying blade on described drilling rod, described spiral conveying blade is positioned at described oval socket opening one end, and described spiral conveying blade stretches in described oval socket.In use, described drilling rod is connected with all the other drilling rods near described spiral conveying blade one end, is driven in the hole entering and needing salvaging by all the other drilling rods. Then, described drilling rod is connected with all the other drilling rods near described oval socket one end, drives by all the other drilling rods and rotates. Thus drive the described spiral conveying blade on described drilling rod to rotate. Oval socket is concomitant rotation not, and gear wheel is by the drive of spiral conveying blade, and rising slowly is delivered in oval socket, then takes described cone fisher out of, thus has salvaged gear wheel.
Described cone fisher provided by the invention, has reequiped existing drilling rod, adopts the principle of helical feed, gear wheel is taken to after in oval socket and take out of, mechanically salvage, shorter much than artificial salvaging efficiency elapsed time, greatly improve salvaging efficiency.
Based on this, the present invention, than original technology, has gear wheel and salvages the high advantage of efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparent, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is cone fisher example structure schematic diagram.
Reference numeral:
1-drilling rod; 2-oval socket;
3-keeps off ring; 4-spiral conveying blade;
5-first strengthening ring; 6-floor;
7-the 2nd strengthening ring; 8-first block;
9-second gear block; 10-strengthening rib.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme of the present invention is clearly and completely described, it is clear that described embodiment is the present invention's part embodiment, instead of whole embodiments. Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
In describing the invention, it should be noted that, it is based on orientation shown in the drawings or position relation that the orientation of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " or position are closed; be only the present invention for convenience of description and simplified characterization; instead of the device that refers to of instruction or hint or element must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention. In addition, term " first ", " the 2nd ", " the 3rd " are only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it is necessary to explanation, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, it is possible to be fixedly connected with, it is also possible to be removably connect, or the connection of one; Can be mechanically connected, it is also possible to be that electric welding connects; Can be directly be connected, it is also possible to be indirectly connected by intermediary, it is possible to be the connection of two element internals. For the ordinary skill in the art, it is possible to particular case understands above-mentioned term concrete implication in the present invention.
Embodiment
As shown in Figure 1, Fig. 1 is cone fisher example structure schematic diagram. Providing a kind of cone fisher in the present embodiment, described cone fisher comprises cylindrical drilling rod 1;
It is set with oval socket 2 outside described drilling rod 1; Described oval socket 2 one end is connected with gear ring 3, the other end opening; Gear ring 3 is as, at the bottom of cylinder, being used for accepting gear wheel; Described gear ring 3 is rotationally connected with described drilling rod 1;
Also being connected with spiral conveying blade 4 on described drilling rod 1, described spiral conveying blade 4 is spirally wrapped around on described drilling rod 1. Described sleeve and described spiral conveying blade according to aperture different can make with aperture difference few. Described spiral conveying blade 4 is positioned at described oval socket 2 opening one end, and described spiral conveying blade 4 stretches in described oval socket 2 such that it is able to sent into smoothly in oval socket 2 by gear wheel.
Described cone fisher provided by the invention, in use, described drilling rod 1 is connected with all the other drilling rods near described spiral conveying blade 4 one end, is driven in the hole entering and needing salvaging by all the other drilling rods. Then, described drilling rod 1 is connected with all the other drilling rods 1 near described oval socket 2 one end, drives by all the other drilling rods and rotates. Thus drive the described spiral conveying blade 4 on described drilling rod 1 to rotate.
In this time, oval socket 2 not concomitant rotation, gear wheel is by the drive of spiral conveying blade 4, and rising slowly is delivered in oval socket 2, then takes described cone fisher out of, thus has salvaged gear wheel.
Described cone fisher provided by the invention, by driving drilling rod 1 to rotate, adopts the principle of helical feed, take out of after gear wheel is taken to oval socket 2 li, mechanically salvage, shorter much than artificial salvaging efficiency elapsed time, greatly improve salvaging efficiency.
Based on this, the present invention, than original technology, has gear wheel and salvages the high advantage of efficiency.
Such as Fig. 1, in the optional scheme of the present embodiment, described oval socket 2 is cylindrical.
The oval socket 2 of round shape is convenient to processing, and described oval socket 2 is cylindrical, and procedure of processing is simple, and tooling cost is low, also facilitates with described gear ring 3 is fixing. Also it is convenient to enter in drill-through hole.
Such as Fig. 1, in the optional scheme of the present embodiment, being provided with the first strengthening ring 5 between described gear ring 3 and described drilling rod 1, described first strengthening ring 5 connects admittedly with described gear ring 3, and described first strengthening ring 5 is rotationally connected with described drilling rod 1.
Admittedly connect with described drilling rod 1 by arranging the first strengthening ring 5, it is convenient to arrange rotation part, gear ring 3 thinner thickness, it is not easy to arrange rotation part.
Further, described gear ring 3 deviates from described oval socket 2 side and is also connected with polylith floor 6; Floor 6 described in polylith is uniformly distributed around described drilling rod 1; Floor 6 described in polylith all connects admittedly with described first strengthening ring 5; Floor 6 described in polylith is all rotationally connected with described drilling rod 1.
Floor 6 described in polylith play strengthen oval socket 2 structural strength effect, it is possible to oval socket 2 is played good fixed action, prevent oval socket 2 enter boring in come off from drilling rod 1, impact salvaging.
Further, described drilling rod 1 is also provided with the 2nd strengthening ring 7, described in polylith, floor 6 and described 2nd strengthening ring 7 connect admittedly, and described 2nd strengthening ring 7 is rotationally connected with described drilling rod 1.
Admittedly connecing with described drilling rod 1 by arranging the 2nd strengthening ring 7, be convenient to arrange rotation part, floor 6 is vertical with described drilling rod 1, it is not easy to arrange rotation part.
Further, described drilling rod 1 is also connected with the first block 8 and second gear block 9, described first block 8 is positioned at described oval socket 2, with described first strengthening ring 5 to connecing; Described second gear block 9 is positioned at one end that described 2nd strengthening ring 7 deviates from described oval socket 2, and described second gear block 9 and described 2nd strengthening ring 7 are to connecing.
By arranging described first block 8 and described second gear block 9, it is convenient to fixing described first strengthening ring 5, the 2nd strengthening ring 7 and floor 6 and oval socket 2, prevents them from occurring axially to jump in salvaging process.
Further, described first block 8 and described second gear block 9 all in annular, described first block 8 and the rotation axle center of described second gear block 9 and the rotation axle center conllinear of described drilling rod 1.
Described first strengthening ring 5 and described 2nd strengthening ring 7, all in annular, can be kept out, it is possible to better prevent the axis of described first strengthening ring 5 and described 2nd strengthening ring 7 from jumping by described first block 8 and described second gear block 9 around described drilling rod 1 one circle.
Further, it is connected with strengthening rib 10 between described first block 8 and described drilling rod 1; It is connected with strengthening rib 10 between described second gear block 9 and described drilling rod 1.
By arranging strengthening rib 10, it is to increase the barrier effect of described first block 8 and described second gear block 9, it is to increase structural strength.
Preferably, described first strengthening ring 5 and described 2nd strengthening ring 7 are all rotationally connected by sealing bearing and described drilling rod 1.
Adopting bearing to be rotationally connected Technical comparing maturation, processing is simple, it may also be useful to convenient, rotates smooth. Can also using other rotating manner, the mode of such as slide rail and chute coupling, all in the protection domain of the application.
In the optional scheme of the present embodiment, described gear ring 3 welds with described oval socket 2.
The mode of welding is fixed, and processing is simple, it is possible to effectively make gear ring 3 and oval socket 2 combine fixing.
Last it is noted that above each embodiment is only in order to illustrate the technical scheme of the present invention, it is not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technology feature is carried out equivalent replacement; And these amendments or replacement, do not make the scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (10)
1. a cone fisher, it is characterised in that, comprise cylindrical drilling rod;
It is set with oval socket outside described drilling rod; Described oval socket one end is connected with gear ring, the other end opening; Described gear ring and described drilling rod are rotationally connected;
Also being connected with spiral conveying blade on described drilling rod, described spiral conveying blade is positioned at described oval socket opening one end, and described spiral conveying blade stretches in described oval socket.
2. cone fisher according to claim 1, it is characterised in that, described oval socket is cylindrical.
3. cone fisher according to claim 1, it is characterised in that, it is provided with the first strengthening ring between described gear ring and described drilling rod, described first strengthening ring and described gear ring connect admittedly, and described first strengthening ring and described drilling rod are rotationally connected.
4. cone fisher according to claim 3, it is characterised in that, described gear ring deviates from described oval socket side and is also connected with polylith floor; Floor described in polylith is uniformly distributed around described drilling rod; Floor described in polylith all connects admittedly with described first strengthening ring; Floor described in polylith is all rotationally connected with described drilling rod.
5. cone fisher according to claim 4, it is characterised in that, described drilling rod is also provided with the 2nd strengthening ring, floor described in polylith and described 2nd strengthening ring connect admittedly, and described 2nd strengthening ring and described drilling rod are rotationally connected.
6. cone fisher according to claim 5, it is characterised in that, described drilling rod is also connected with the first block and second gear block, described first block is positioned at described oval socket, with described first strengthening ring to connecing;Described second gear block is positioned at one end that described 2nd strengthening ring deviates from described oval socket, and described second gear block and described 2nd strengthening ring are to connecing.
7. cone fisher according to claim 6, it is characterised in that, described first block and described second gear block all in annular, the rotation axle center of described first block and described second gear block and the rotation axle center conllinear of described drilling rod.
8. cone fisher according to claim 7, it is characterised in that, it is connected with strengthening rib between described first block and described drilling rod; It is connected with strengthening rib between described second gear block and described drilling rod.
9. cone fisher according to claim 5, it is characterised in that, described first strengthening ring and described 2nd strengthening ring are all rotationally connected by sealing bearing and described drilling rod.
10. cone fisher according to the arbitrary item of claim 1-9, it is characterised in that, described gear ring welds with described oval socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206440.1A CN105649566B (en) | 2016-04-05 | 2016-04-05 | cone fisher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206440.1A CN105649566B (en) | 2016-04-05 | 2016-04-05 | cone fisher |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105649566A true CN105649566A (en) | 2016-06-08 |
| CN105649566B CN105649566B (en) | 2018-10-23 |
Family
ID=56496968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610206440.1A Active CN105649566B (en) | 2016-04-05 | 2016-04-05 | cone fisher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105649566B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029957A (en) * | 2018-01-12 | 2019-07-19 | 中石化石油工程技术服务有限公司 | Vane type fishing device and Refloatation method |
| CN112814602A (en) * | 2021-02-05 | 2021-05-18 | 廊坊华元机电工程有限公司 | External spiral fishing barrel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4030745A (en) * | 1976-06-16 | 1977-06-21 | Schoeffler William N | Tool retriever for wells |
| CN201650182U (en) * | 2010-03-18 | 2010-11-24 | 中国石油化工集团公司 | Cone overshot for horizontally directional drilling |
| CN203394397U (en) * | 2013-08-07 | 2014-01-15 | 中国石油化工股份有限公司 | Underground multifunctional sand washing processor |
| CN103939045A (en) * | 2014-04-03 | 2014-07-23 | 中交二航局第三工程有限公司 | Fishing device for fallen drill teeth of roller bit |
| CN204200144U (en) * | 2014-10-28 | 2015-03-11 | 杨庆军 | Spiral interior hook fishing socket |
| CN204851140U (en) * | 2015-05-05 | 2015-12-09 | 河北昆瑞工程技术有限公司 | A section of thick bamboo is salvaged in spiral components of a whole that can function independently |
| CN205558855U (en) * | 2016-04-05 | 2016-09-07 | 中油昆仑管道工程有限公司 | Gear wheel fisher |
-
2016
- 2016-04-05 CN CN201610206440.1A patent/CN105649566B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4030745A (en) * | 1976-06-16 | 1977-06-21 | Schoeffler William N | Tool retriever for wells |
| CN201650182U (en) * | 2010-03-18 | 2010-11-24 | 中国石油化工集团公司 | Cone overshot for horizontally directional drilling |
| CN203394397U (en) * | 2013-08-07 | 2014-01-15 | 中国石油化工股份有限公司 | Underground multifunctional sand washing processor |
| CN103939045A (en) * | 2014-04-03 | 2014-07-23 | 中交二航局第三工程有限公司 | Fishing device for fallen drill teeth of roller bit |
| CN204200144U (en) * | 2014-10-28 | 2015-03-11 | 杨庆军 | Spiral interior hook fishing socket |
| CN204851140U (en) * | 2015-05-05 | 2015-12-09 | 河北昆瑞工程技术有限公司 | A section of thick bamboo is salvaged in spiral components of a whole that can function independently |
| CN205558855U (en) * | 2016-04-05 | 2016-09-07 | 中油昆仑管道工程有限公司 | Gear wheel fisher |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029957A (en) * | 2018-01-12 | 2019-07-19 | 中石化石油工程技术服务有限公司 | Vane type fishing device and Refloatation method |
| CN112814602A (en) * | 2021-02-05 | 2021-05-18 | 廊坊华元机电工程有限公司 | External spiral fishing barrel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105649566B (en) | 2018-10-23 |
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Effective date of registration: 20190107 Address after: 065000 East Nine Main Channels and West Friendship Road, Langfang Economic and Technological Development Zone, Hebei Province Patentee after: PetroChina Kunlun Pipeline Engineering Co Ltd Address before: 065000 Room 602, Unit 4, 12 Building, Jinlanyuan, Jinqiao Road, Guangyang District, Langfang City, Hebei Province Patentee before: Shi Zhanfeng |