CN112065305B - Oil pipe dropout prevention means is used in oil field exploitation - Google Patents
Oil pipe dropout prevention means is used in oil field exploitation Download PDFInfo
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- CN112065305B CN112065305B CN202011260850.7A CN202011260850A CN112065305B CN 112065305 B CN112065305 B CN 112065305B CN 202011260850 A CN202011260850 A CN 202011260850A CN 112065305 B CN112065305 B CN 112065305B
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- 230000002265 prevention Effects 0.000 title claims description 4
- 238000005086 pumping Methods 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 abstract description 8
- 230000007306 turnover Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 74
- 239000003208 petroleum Substances 0.000 description 10
- 230000009471 action Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
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- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
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Classifications
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- 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/16—Connecting or disconnecting pipe couplings or joints
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- 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
- E21B17/02—Couplings; joints
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Supports For Pipes And Cables (AREA)
Abstract
The invention belongs to the technical field of oil pipe anti-drop devices, and particularly discloses an oil pipe anti-drop device for oil field exploitation, which comprises an oil pumping unit body, wherein the top of the oil pumping unit body is fixedly provided with a through-connected connecting oil pipe, a spring sleeve and an internal thread sleeve are movably sleeved on the connecting oil pipe, a limiting ring is arranged below the internal thread sleeve through a rotary bearing, the connecting oil pipe is sleeved with the spring sleeve, the inner part of the limiting ring is fixedly provided with the rotating bearing, the rotating bearing is convenient for driving the internal thread sleeve and the rotating hand ring to rotate, the outer wall of the upper part of the connecting oil pipe is provided with a movable groove, which is convenient for the limiting plate to perform the turnover motion in the movable groove, the lower part of the outer wall of the limiting plate is provided with thread teeth, so that the internal thread sleeve is conveniently connected on the thread teeth in a threaded manner, can carry out spacing fixed to the position of limiting plate, simultaneously under the effect of spring housing, increase the stability of internal thread cover threaded connection on the thread tooth.
Description
Technical Field
The invention belongs to the technical field of oil pipe anti-falling devices, and particularly relates to an oil pipe anti-falling device for oil field exploitation.
Background
Petroleum refers to a mixture of hydrocarbons in gaseous, liquid and solid states, with natural occurrence. Petroleum is classified into crude oil, natural gas liquids, natural coke oils, etc., but "petroleum" is still used as the definition of "crude oil" in a conventional manner. Petroleum is a viscous, dark brown liquid known as "industrial blood". The upper part of the crust has petroleum storage, the main component is a mixture of various alkanes, cyclanes and aromatics, and the petroleum storage is one of the main objects of geological exploration. The oil formation mechanism of petroleum has two theories of biological deposition and oil change and petrochemical oil, the former is widely accepted, and the petroleum is formed by the long evolution of organisms in ancient oceans or lakes, belongs to biological deposition and oil change and cannot be regenerated; the latter considers that oil is produced from the carbon in the earth's crust itself, is biologically unrelated and is renewable. Petroleum is used mainly as fuel and gasoline, and also as a raw material for many chemical industry products such as solutions, fertilizers, pesticides, and plastics.
Along with the rapid development of social economy, the demand for petroleum is also gradually increased, in the current recovery mode of an oil field, the oil pumping unit still occupies a large proportion, the outer layer of the oil well is a sleeve, the space between the sleeve and a well wall is sealed by cement, so that the sleeve is fixed under the well, an oil pipe suspended on the well head is arranged in the sleeve and is an oil outlet channel, an oil pump is put into the well by the oil pipe, and because the oil pipe is a suspension body suspended on the well head, the phenomenon of loose buckling and falling off can be generated at the connecting part of the oil pipe under the condition of long-term oil pumping because the oil pipe is single in installation structure. If the oil pipe falls off, production stopping operation is needed, production is seriously affected, and therefore the installation structure of the oil pipe needs to be improved.
Disclosure of Invention
The invention aims to: in order to solve the problem, the anti-falling device for the oil pipe for oil field exploitation is provided.
The technical scheme adopted by the invention is as follows:
an oil pipe anti-drop device for oil field exploitation comprises an oil pumping unit body, wherein a through connection oil pipe is fixedly installed at the top of the oil pumping unit body, a spring sleeve and an internal thread sleeve are movably sleeved on the connection oil pipe, a limiting ring is installed below the internal thread sleeve through a rotating bearing and is fixedly connected with the top end of the spring sleeve, a rotating bracelet is fixedly installed above the internal thread sleeve, an oil conveying pipe is installed at the top of the connection oil pipe through a positioning screw, a movable groove is formed in the periphery of the upper portion of the connection oil pipe, a limiting plate is hinged inside the movable groove, thread teeth are arranged on the outer wall below the limiting plate and are in threaded connection with the inside of the internal thread sleeve, a positioning rod is fixedly installed above the limiting plate relative to one side of the oil conveying pipe, and a first magnet is fixedly installed at one end, far away from, defeated oil pipe is last fixed mounting has the locking collar, and the constant head tank has been seted up to the position of the relative first magnet of locking collar, the inside fixed mounting of constant head tank has the second magnet, locating lever and first magnet are pegged graft in the constant head tank, and first magnet adsorbs mutually with the second magnet, the guide way has been seted up to the relative defeated oil pipe's of limiting plate below one side, and the inside fixed mounting of guide way has the guide bar, the inside activity of guide way is pegged graft and is had the locating plate, and the locating plate activity cup joints on the guide bar, threaded connection has set nut on the guide bar, and the set nut pressfitting is at the top of locating plate, the locating plate pressfitting is on set nut.
In a preferred invention mode, the bottom end of the spring sleeve is fixedly connected to the top of the pumping unit body, and the outer diameters of the limiting ring and the rotary bracelet are the same.
In a preferred invention mode, the limiting ring is attached to the rotary bracelet, and the outer wall of the rotary bracelet is fixedly provided with the anti-slip rubber sleeve.
In a preferred invention, the first magnet and the second magnet have opposite polarities, and the number of the positioning grooves is four, and the positioning grooves are arranged in a pairwise opposite manner.
In a preferred mode of the invention, the guide rod is longitudinally and fixedly installed in the guide groove, and the outer wall of the guide rod is of a threaded structure.
In a preferred invention mode, the number of the limiting plates is four, the limiting plates are arranged in a pairwise opposite mode, and the lower portions of the limiting plates are matched with the movable grooves.
In a preferred mode of the invention, the total length of the positioning rod, the first magnet and the second magnet is the same as the depth of the positioning groove, and the inner diameter of the oil pipeline is the same as the inner diameter of the connecting oil pipe.
In a preferred invention mode, the positioning plate and the positioning screw are arranged oppositely, and the rotating bearing is matched with the limiting ring.
In a preferred invention, the top of the limiting plate and the top of the locking ring are located on the same horizontal plane, and the limiting plate is matched with the abutting surface of the locking ring.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: better with defeated oil pipe spacing fixed for defeated oil pipe is difficult for producing when using for a long time with being connected oil pipe and breaks away from, and defeated oil pipe is comparatively convenient with being connected the oil pipe dismouting simultaneously, reduces the manpower, increases work efficiency.
1. According to the invention, the spring sleeve is sleeved on the connecting oil pipe, the spring sleeve is convenient to drive the limiting ring and the rotary bracelet to move up and down, the rotary bearing is fixedly arranged in the limiting ring, the rotary bearing is convenient to drive the internal thread sleeve and the rotary bracelet to rotate, the movable groove is formed in the outer wall above the connecting oil pipe, the limiting plate is convenient to turn inside the movable groove, the thread teeth are arranged below the outer wall of the limiting plate, the internal thread sleeve is convenient to be connected onto the thread teeth in a threaded mode, the position of the limiting plate can be limited and fixed, and meanwhile, the stability of the internal thread sleeve in threaded connection onto the thread teeth is improved under the action of the spring sleeve.
2. According to the oil conveying pipe limiting device, the positioning rod is fixedly arranged above the limiting plate relative to one side face of the oil conveying pipe, the positioning rod is conveniently inserted into the positioning groove, the limiting plate and the positioning rod can be limited in position, the first magnet is fixedly arranged at one end, away from the limiting plate, of the positioning rod, the first magnet is conveniently adsorbed on the second magnet, the limiting plate and the positioning rod are better limited and fixed in position, and the oil conveying pipe can be better limited on the connecting oil pipe at the moment.
3. According to the oil pipe positioning device, the guide groove is formed below one side face, opposite to the oil pipe, of the limiting plate, the positioning plate is convenient to movably insert in the guide groove, the position of the positioning plate can be limited and guided, the guide rod is longitudinally and fixedly mounted inside the guide groove, the positioning plate is convenient to movably sleeve on the guide rod, the limiting and guiding effects can be achieved on the positioning plate, the moving stability of the positioning plate is improved, the positioning nut is connected to the guide rod in a threaded mode, the position of the positioning plate can be limited under the effect of the positioning nut, the positioning plate is pressed on the positioning screw, the positioning screw is not prone to being separated, and the mounting stability of the oil pipe and the connecting oil pipe is improved.
Drawings
FIG. 1 is a schematic diagram of the front view structure of the present invention;
FIG. 2 is a schematic structural diagram of a stop collar, an internal thread bush and a rotary bracelet structure according to the present invention;
FIG. 3 is a cross-sectional view of the stop collar, connecting tubing and swivel bracelet of the present invention;
FIG. 4 is a cross-sectional view of a front view of the present invention;
FIG. 5 is an enlarged view of the structure of area A in FIG. 4 according to the present invention.
The labels in the figure are: 1-oil pumping unit body, 2-connecting oil pipe, 3-spring sleeve, 4-limiting ring, 5-rotary bearing, 6-internal thread sleeve, 7-rotary hand ring, 8-positioning screw, 9-oil conveying pipe, 10-movable groove, 11-limiting plate, 12-thread tooth, 13-positioning rod, 14-first magnet, 15-locking ring, 16-positioning groove, 17-second magnet, 18-guiding groove, 19-guiding rod, 20-positioning plate and 21-positioning nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-5, an oil pipe dropout prevention means for oil field exploitation, includes beam-pumping unit body 1, its characterized in that: the top of the pumping unit body 1 is fixedly provided with a connecting oil pipe 2 which is in through connection, the connecting oil pipe 2 is movably sleeved with a spring sleeve 3 and an internal thread sleeve 6, the spring sleeve 3 is convenient for driving a limiting ring 4 and a rotary bracelet 7 to move up and down, the bottom end of the spring sleeve 3 is fixedly connected with the top of the pumping unit body 1, the limiting ring 4 is arranged below the internal thread sleeve 6 through a rotary bearing 5, the rotary bearing 5 is convenient for driving the internal thread sleeve 6 and the rotary bracelet 7 to rotate, the rotary bearing 5 is matched with the limiting ring 4, the outer diameters of the limiting ring 4 and the rotary bracelet 7 are the same, the limiting ring 4 is attached to the rotary bracelet 7, the limiting ring 4 is fixedly connected with the top end of the spring sleeve 3, the rotary bracelet 7 is fixedly arranged above the internal thread sleeve 6, the outer wall of the rotary bracelet 7 is fixedly provided with an anti-slip rubber sleeve, the top of, the inner diameter of the oil delivery pipe 9 is the same as the inner diameter of the oil connecting pipe 2, the periphery above the oil connecting pipe 2 is externally provided with a movable groove 10, so that the limit plates 11 can perform turning motion in the movable groove 10 conveniently, the limit plates 11 are hinged in the movable groove 10, the top of the limit plates 11 and the top of the locking ring 15 are positioned on the same horizontal plane, the joint surfaces of the limit plates 11 and the locking ring 15 are matched, the number of the limit plates 11 is four, every two of the limit plates are oppositely arranged, the lower part of the limit plates 11 is matched with the movable groove 10, the outer wall below the limit plates 11 is provided with thread teeth 12, the thread teeth 12 are in threaded connection in the internal thread sleeve 6, so that the internal thread sleeve 6 is in threaded connection on the thread teeth 12, the position of the limit plates 11 can be limited and fixed, meanwhile, under the action of the spring sleeve 3, the stability of the internal thread sleeve 6 in threaded, be convenient for peg graft the locating lever 13 in constant head tank 16, can be spacing to the position of limiting plate 11 and locating lever 13, and the one end fixed mounting that the locating lever 13 kept away from limiting plate 11 has first magnet 14, be convenient for adsorb first magnet 14 on second magnet 17, better carry out spacing fixed to the position of limiting plate 11 and locating lever 13, can be better spacing oil pipe 9 on connecting oil pipe 2 this moment, locating lever 13, the total length of first magnet 14 and second magnet 17 is the same with the degree of depth of constant head tank 16, first magnet 14 is opposite with second magnet 17 polarity, fixed mounting has locking ring 15 on the oil pipe 9, and locking ring 15 has seted up constant head tank 16 relative to the position of first magnet 14, the quantity of constant head tank 16 is four, and two liang of relative settings, the inside fixed mounting of constant head tank 16 has second magnet 17, locating lever 13 and first magnet 14 peg graft in constant head tank 16, the first magnet 14 and the second magnet 17 are attracted, a guide groove 18 is formed in one side, opposite to the oil delivery pipe 9, below the limit plate 11, so that the limit plate 20 can be movably inserted into the guide groove 18, the position of the limit plate 20 can be limited and guided, a guide rod 19 is fixedly arranged inside the guide groove 18, so that the limit plate 20 can be movably sleeved on the guide rod 19, the limit and guide effects on the limit plate 20 can be achieved, the moving stability of the limit plate 20 is improved, the guide rod 19 is longitudinally and fixedly arranged in the guide groove 18, the outer wall of the guide rod 19 is of a threaded structure, the limit plate 20 is movably inserted into the guide groove 18, the limit plate 20 is movably sleeved on the guide rod 19, the limit plate 20 is arranged opposite to the positioning screw 8, the guide rod 19 is in threaded connection with a positioning screw cap 21, the positioning screw cap 21 is pressed on the top of the limit plate 20, under the action of the positioning, can carry on spacingly to the position of locating plate 20 for locating plate 20 pressfitting is on set screw 8, makes set screw 8 difficult production break away from, increases defeated oil pipe 9 and the stability of connecting oil pipe 2 installation, and locating plate 20 pressfitting is on set screw 8.
The working principle is as follows:
in the invention, when the oil delivery pipe 9 is installed, the rotary bracelet 7 is firstly rotated towards one side to separate the internal thread sleeve 6 from the thread teeth 12, at the moment, the rotary bracelet 7 is pressed downwards to enable the rotary bracelet 7 to be positioned below the thread teeth 12, the limiting plate 11 is overturned towards the outer side, the bottom end of the oil delivery pipe 9 is installed at the top of the connecting oil pipe 2 through a screw, the limiting plate 11 is overturned towards one side of the oil delivery pipe 9, the positioning rod 13 and the first magnet 14 can be inserted into the positioning groove 16, at the moment, the first magnet 14 and the second magnet 17 are adsorbed together, the positioning plate 20 is moved downwards to enable the positioning plate 20 to be pressed on the positioning screw 8, the positioning screw cap 21 is rotated towards one side, the positioning screw cap 21 can be pressed on the top of the positioning plate 20, at the moment, the position of the positioning plate 20 can be limited and fixed, and the stability, loosen rotatory bracelet 7 for upward movement under the effect of rotatory bracelet 7 at spring housing 3, internal thread cover 6 and the 12 contacts of thread tooth this moment, through rotating rotatory bracelet 7 to one side, and rotatory bracelet 7 drives internal thread cover 6 and under swivel bearing 5's effect this moment, with 6 threaded connection of internal thread cover on thread tooth 12, can carry out spacing fixed to the position of limiting plate 11.
It is to be noted that, in the present invention, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides an oil pipe dropout prevention means for oil field exploitation, includes beam-pumping unit body (1), its characterized in that: the oil pumping unit is characterized in that a connecting oil pipe (2) in through connection is fixedly mounted at the top of the oil pumping unit body (1), a spring sleeve (3) and an internal thread sleeve (6) are movably sleeved on the connecting oil pipe (2), a limiting ring (4) is mounted below the internal thread sleeve (6) through a rotary bearing (5), the limiting ring (4) is fixedly connected with the top end of the spring sleeve (3), a rotary bracelet (7) is fixedly mounted above the internal thread sleeve (6), an oil conveying pipe (9) is mounted at the top of the connecting oil pipe (2) through a positioning screw (8), a movable groove (10) is formed in the periphery of the upper part of the connecting oil pipe (2), a limiting plate (11) is hinged to the inner part of the movable groove (10), thread teeth (12) are arranged on the outer wall below the limiting plate (11), and the thread teeth (12) are in the internal thread sleeve (6), a positioning rod (13) is fixedly mounted above the limiting plate (11) relative to one side of the oil delivery pipe (9), a first magnet (14) is fixedly mounted at one end, far away from the limiting plate (11), of the positioning rod (13), a locking ring (15) is fixedly mounted on the oil delivery pipe (9), a positioning groove (16) is formed in the position, relative to the first magnet (14), of the locking ring (15), a second magnet (17) is fixedly mounted inside the positioning groove (16), the positioning rod (13) and the first magnet (14) are inserted into the positioning groove (16), the first magnet (14) and the second magnet (17) are adsorbed, a guide groove (18) is formed in one side, relative to the oil delivery pipe (9), of the lower portion of the limiting plate (11), a guide rod (19) is fixedly mounted inside the guide groove (18), and a positioning plate (20) is movably inserted into the guide groove (18), and the positioning plate (20) is movably sleeved on the guide rod (19), a positioning nut (21) is connected to the guide rod (19) in a threaded manner, the positioning nut (21) is pressed on the top of the positioning plate (20), and the positioning plate (20) is pressed on the positioning screw (8).
2. The anti-drop device for the oil pipe for oil field exploitation according to claim 1, wherein: the bottom fixed connection of spring housing (3) is at the top of beam-pumping unit body (1), the external diameter of spacing ring (4) and rotatory bracelet (7) is the same.
3. The anti-drop device for the oil pipe for oil field exploitation according to claim 1, wherein: spacing ring (4) and rotatory bracelet (7) are laminated mutually, the outer wall fixed mounting of rotatory bracelet (7) has the anti-skidding rubber cover.
4. The anti-drop device for the oil pipe for oil field exploitation according to claim 1, wherein: the first magnet (14) and the second magnet (17) are opposite in polarity, the number of the positioning grooves (16) is four, and the positioning grooves are arranged in a pairwise opposite mode.
5. The anti-drop device for the oil pipe for oil field exploitation according to claim 1, wherein: the guide rod (19) is longitudinally and fixedly installed in the guide groove (18), and the outer wall of the guide rod (19) is of a threaded structure.
6. The anti-drop device for the oil pipe for oil field exploitation according to claim 1, wherein: the number of the limiting plates (11) is four, the limiting plates are arranged in a pairwise opposite mode, and the lower portions of the limiting plates (11) are matched with the movable grooves (10).
7. The anti-drop device for the oil pipe for oil field exploitation according to claim 1, wherein: the total length of locating lever (13), first magnet (14) and second magnet (17) is the same with the degree of depth of constant head tank (16), the internal diameter of defeated oil pipe (9) is the same with the internal diameter of connecting oil pipe (2).
8. The anti-drop device for the oil pipe for oil field exploitation according to claim 1, wherein: the positioning plate (20) and the positioning screw (8) are arranged oppositely, and the rotary bearing (5) is matched with the limiting ring (4).
9. The anti-drop device for the oil pipe for oil field exploitation according to claim 1, wherein: the top of the limiting plate (11) and the top of the locking ring (15) are located on the same horizontal plane, and the abutting surfaces of the limiting plate (11) and the locking ring (15) are matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011260850.7A CN112065305B (en) | 2020-11-12 | 2020-11-12 | Oil pipe dropout prevention means is used in oil field exploitation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011260850.7A CN112065305B (en) | 2020-11-12 | 2020-11-12 | Oil pipe dropout prevention means is used in oil field exploitation |
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| CN112065305A CN112065305A (en) | 2020-12-11 |
| CN112065305B true CN112065305B (en) | 2021-02-02 |
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| CN104895496A (en) * | 2015-06-15 | 2015-09-09 | 杨炳 | Drilling device with lifting motor and oil conveying pipes |
| CN105804669A (en) * | 2016-05-24 | 2016-07-27 | 成都迪普金刚石钻头有限责任公司 | Pulse type drilling connector |
| CN208073395U (en) * | 2018-01-18 | 2018-11-09 | 江苏庆海石油机械有限公司 | A kind of oil well head device of easy disassembly |
| CN207974788U (en) * | 2018-02-27 | 2018-10-16 | 天津精工石油专用管件有限公司 | A kind of novel continuous oil pipe anti-dropping apparatus |
| CN208718589U (en) * | 2018-08-02 | 2019-04-09 | 郭俊 | Wellhead flange disk dismounts tool for helping |
| CN209484058U (en) * | 2018-12-12 | 2019-10-11 | 大庆市华禹石油机械制造有限公司 | A kind of oilfield exploitation oil pipe anti-drop device |
| CN209780776U (en) * | 2019-03-12 | 2019-12-13 | 天津康坦石油设备科技有限公司 | Novel oil well pipe fitting sealing device |
| CN210598848U (en) * | 2019-10-07 | 2020-05-22 | 江苏荣嶺机械制造有限公司 | Disconnecting and connecting device with anti-falling joint |
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