CN111997558B - Oil field well head protection device - Google Patents
Oil field well head protection device Download PDFInfo
- Publication number
- CN111997558B CN111997558B CN202010822736.2A CN202010822736A CN111997558B CN 111997558 B CN111997558 B CN 111997558B CN 202010822736 A CN202010822736 A CN 202010822736A CN 111997558 B CN111997558 B CN 111997558B
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- Prior art keywords
- wellhead
- pressure
- opening
- protective cover
- arc
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
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- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0021—Safety devices, e.g. for preventing small objects from falling into the borehole
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
Abstract
The invention discloses an oil field wellhead protection device, which relates to the technical field of oil field exploitation and comprises a base, an opening-closing type sleeve, an arc-shaped fixing plate, a protection cover and a pressure and temperature monitoring system, wherein the pressure and temperature monitoring system is used for monitoring the pressure and temperature of a wellhead in real time. The protective cover is simple and reasonable in structure, the three-layer outer sleeve structure of the protective cover, the opening-closing type barrel sleeve and the arc-shaped fixing plate can effectively protect the well mouth from being damaged due to wind and sun, the well mouth can be kept vertical due to the clamping effect of the arc-shaped fixing plate, the well mouth can be prevented from sinking, meanwhile, personnel can be effectively prevented from falling due to the arrangement of the protective cover, and the safety coefficient of oil field exploitation is improved; in addition, the pressure and temperature monitoring system is combined and arranged on the protective cover to monitor the pressure and temperature of the wellhead in real time, so that whether the oil well is normal or not can be reminded to workers, normal production operation of the oil well is ensured, and the practicability is strong.
Description
Technical Field
The invention relates to the technical field of oilfield exploitation, in particular to an oilfield wellhead protection device.
Background
The oil well is a hole drilled by a well arrangement system for exploiting and planning oil and is generally drilled to reach an oil layer, and then a casing pipe of the oil layer is put into the oil well for lifting the oil from the bottom of the oil well to a well head. In the prior art, a well mouth after the operation of the pumping unit is exposed in the environment, the well mouth of an oil well is not protected, and the safety of well mouth protection measures is low, so that accidents are easy to happen. Although the existing wellhead protection device plays a basic protection role, most of wellhead protection devices are difficult to disassemble and assemble, the application range is narrow, and the wellhead protection device cannot be used universally for wellheads of different sizes.
Meanwhile, the temperature and the pressure of the wellhead are important detection data for normal production of the oil well, and under a certain production working system, the temperature and the pressure of the wellhead of the oil well are basically unchanged, so that the production of the oil well can be abnormal if sudden changes occur. Therefore, it is also very important to perform real-time pressure monitoring and temperature monitoring on the temporarily unused well head. However, there is currently no wellhead safety protection device that can be used for real-time monitoring of wellhead temperature and pressure. Therefore, how to provide a wellhead protection device with a wellhead pressure monitoring function is one of the problems to be solved by the invention.
Disclosure of Invention
The invention aims to provide an oilfield wellhead protection device which is reasonable in structure and can realize real-time monitoring of wellhead pressure and wellhead temperature, and the technical problems are solved.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an oil field wellhead protection device which comprises a base, an opening-closing barrel sleeve arranged above the base, an arc-shaped fixing plate arranged inside the opening-closing barrel sleeve, a protection cover covering the outside of the opening-closing barrel sleeve and a pressure and temperature monitoring system arranged at the top in the protection cover, wherein the arc-shaped fixing plate is arranged in the opening-closing barrel sleeve; the opening-closing type cylinder sleeve is sleeved on the outer wall of the wellhead; the outer part of the arc-shaped fixing plate is connected with one end of an adjusting rod, and the other end of the adjusting rod penetrates through the cylinder wall of the opening-closing type cylinder sleeve and is in threaded connection with a U-shaped frame arranged on the outer side wall of the opening-closing type cylinder sleeve; the adjusting rod is used for radially adjusting the position of the arc-shaped fixing plate so as to enable the arc-shaped fixing plate to be tightly attached to the outer wall of a wellhead; a notch is formed in the bottom end of the inner part of the protective cover, an adjustable locking rod is installed on the base, and when the outer end of the adjustable locking rod is adjusted to be clamped into the notch, the protective cover is locked on the base; the lifter is connected at pressure temperature monitoring system's top, the lifter runs through stretch out behind the roof of safety cover to with set up in "U" type frame threaded connection of roof in the safety cover, pressure temperature monitoring system is used for the pressure and the temperature of real-time supervision well head.
Optionally, the arc-shaped fixing plate and the opening-closing type sleeve are coaxially arranged, and two arc-shaped fixing plates are symmetrically arranged.
Optionally, a wellhead lower stop block is installed at the top of the opening-closing type sleeve and is used for being connected with a wellhead flange.
Optionally, the opening-closing type barrel sleeve comprises two half barrel sleeves connected through a hinge, and the barrel wall of each half barrel sleeve is of a telescopic structure and used for being matched with well mouths with different heights.
Optionally, the adjustable locking rod is connected with a worm gear mechanism, the worm gear mechanism comprises a worm wheel and a worm meshed with the worm wheel, the worm is embedded in the base, the worm wheel is installed above the base, and the worm wheel is driven by a rocker.
Optionally, the pressure and temperature monitoring system comprises a shell, and a temperature sensor and a pressure sensor which are arranged at the bottom of the shell, wherein a data acquisition module and a wireless transmission module which are in signal connection with each sensor are arranged in the shell, and data are transmitted by the wireless transmission module and are received by a wireless gateway in a control room.
Optionally, the pressure and temperature monitoring system is further configured with a battery module and a display screen, and the data acquisition module and the wireless transmission module are in signal connection with the display screen; the battery module comprises a solar cell panel and a lithium battery electrically connected with the solar cell panel, and the lithium battery is installed on the inner wall of the protective cover and used for supplying power to all power consumption parts.
Optionally, a mounting baffle is arranged on one side of the protective cover, and the solar cell panel is mounted above the mounting baffle; the lithium battery is installed in the outer wall of the protection cover and located below the installation baffle.
Optionally, the base is fixed to the ground through a fixing column.
Optionally, the adjusting rod and the outer end of the lifting rod are both provided with adjusting hand wheels.
Compared with the prior art, the invention has the following technical effects:
the oil field wellhead protection device provided by the invention is simple and reasonable in structure, the three-layer outer sleeve structure of the protection cover, the opening-closing type sleeve and the arc-shaped fixing plate can effectively realize the use protection of the wellhead, prevent the wellhead from being damaged due to wind and sun, keep the wellhead vertical due to the clamping effect of the arc-shaped fixing plate, prevent the wellhead from collapsing, and meanwhile, the arrangement of the protection cover can also effectively prevent personnel from falling off, so that the safety coefficient of oil field exploitation is improved; in addition, the pressure and temperature monitoring system is combined and arranged on the protective cover to monitor the pressure and temperature of the wellhead in real time, so that whether the oil well is normal or not can be reminded to workers, normal production operation of the oil well is ensured, and the practicability is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the overall structure of the oilfield wellhead protection device of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the oilfield wellhead protection device of the present invention;
wherein the reference numerals are: 1. a base; 2. an opening-closing type cylinder sleeve; 3. an arc-shaped fixing plate; 4. a protective cover; 5. adjusting a rod; 6. a U-shaped frame; 7. a recess; 8. an adjustable locking lever; 9. a lifting rod; 10. a wellhead lower stop block; 11. a worm gear; 12. a worm; 13. a rocker; 14. a housing; 15. a temperature sensor; 16. a pressure sensor; 17. a data acquisition module; 18. a wireless transmission module; 19. a display screen; 20. a solar panel; 21. a lithium battery; 22. installing a baffle; 23. fixing a column; 24. adjusting a hand wheel; 25. and a stop block is arranged on the wellhead.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The first embodiment is as follows:
as shown in fig. 1-2, the embodiment provides an oilfield wellhead protection device, which includes a base 1, an opening-closing type barrel casing 2 installed above the base 1, an arc-shaped fixing plate 3 disposed inside the opening-closing type barrel casing 2, a protection cover 4 covering the outside of the opening-closing type barrel casing 2, and a pressure and temperature monitoring system installed at the top inside the protection cover 4; the opening-closing type cylinder sleeve 2 is used for being sleeved on the outer wall of a wellhead; the outer part of the arc-shaped fixing plate 3 is connected with one end of an adjusting rod 5, the other end of the adjusting rod 5 penetrates through the cylinder wall of the opening-closing type cylinder sleeve 2 and is in threaded connection with a U-shaped frame 6 arranged on the outer side wall of the opening-closing type cylinder sleeve 2, and the screwing adjusting rod 5 can be used for radially adjusting the position of the arc-shaped fixing plate 3 so that the inner arc surface of the arc-shaped fixing plate 3 is tightly attached to the outer wall of a corresponding well mouth after the base 1 is fixed in place, the well mouth can be kept vertical, and collapse is prevented; a notch 7 is formed in the bottom end inside the protective cover 4, an adjustable locking rod 8 is mounted on the base 1, and when the outer end of the adjustable locking rod 8 is adjusted to be clamped into the notch 7, the adjustable locking rod and the notch are in concave-convex clamping connection, so that the protective cover 4 is locked on the base 1; the lifter 9 is connected at pressure temperature monitoring system's top, stretches out behind the roof of lifter 9 running through safety cover 4 to with set up 6 threaded connection of "U" type frame of roof in safety cover 4, pressure temperature monitoring system is used for the pressure and the temperature of real-time supervision well head.
In this embodiment, arc fixed plate 3 is preferred to be provided with the coaxial setting of open-close type barrel casing 2, and the arc fixed plate symmetry is provided with two for bilateral symmetry centre gripping well head lateral wall.
In this embodiment, as shown in fig. 2, a wellhead lower stop block 10 is installed on the top of the opening-closing sleeve 2 for connecting with a wellhead flange.
In this embodiment, open-close type barrel casing 2 includes two half barrel casings through hinge connection, and half base is connected to every half barrel casing, and two half barrel casings are locked through a current mousing-hook subassembly after merging. In this embodiment, the section of thick bamboo wall of every half barrel casing is the extending structure who has the telescopic joint, preferably includes two sections, and the outer section of thick bamboo wall is located to interior section of thick bamboo wall slip cap, can realize the height-adjusting of open-close type barrel casing 2 for match the not well head of co-altitude.
In this embodiment, as shown in fig. 2, the adjustable locking rod 8 is connected to a worm and gear mechanism, the worm and gear mechanism includes a worm wheel 11 and a worm 12 engaged with the worm wheel 11, the worm 12 is embedded and installed inside the base 1 in a conventional rotatable installation manner, the worm wheel 12 is installed above the base 1 in an existing installation manner, and the rocker drives the worm wheel to rotate, so as to drive the adjustable locking rod 8 to extend and retract along the radial direction of the base, thereby locking and unlocking the protection cover 4.
In this embodiment, as shown in fig. 2, the pressure and temperature monitoring system includes a housing 14, and a temperature sensor 15 and a pressure sensor 16 disposed at the bottom of the housing 14, and a data acquisition module 17 and a wireless transmission module 18 connected to the sensors in signal are disposed in the housing 14. Meanwhile, the pressure and temperature monitoring system is also provided with a battery module and a display screen 19, and the data acquisition module 17 and the wireless transmission module 18 are in signal connection with the display screen 19; the battery module comprises a solar panel 20 and a lithium battery 21 electrically connected with the solar panel 20, and the lithium battery 21 is mounted on the inner wall of the protective cover 4 and used for supplying power to all electric components. In this embodiment, the pressure sensor 16, the temperature sensor 15, the display screen 19, and the wireless transmission module 18 are respectively connected to the data acquisition module 17 through signal lines, the lithium battery 21 and the solar cell panel 20 for charging are connected to the data acquisition module 17 through power lines, and transmit data through the wireless transmission module 18 and are received by the wireless gateway in the control room.
In the present embodiment, as shown in fig. 2, a mounting baffle 22 is disposed on one side of the protection cover 4, and the solar cell panel 20 is mounted above the mounting baffle 22; lithium cell 21 installs in protection cover 4 outer wall, and is located the below of installation baffle 22, and installation baffle 22 plays the effect for the sunshade hides rain this moment, is favorable to the protection and the reading of display screen.
In the present embodiment, as shown in fig. 2, the base 1 is fixed to the ground through a fixing post 23.
In the embodiment, as shown in fig. 2, the outer ends of the adjusting rod 5 and the lifting rod 9 are provided with adjusting handwheels 24, which facilitate screwing each rod.
The following is a specific description of the present embodiment:
firstly, two half cylinder sleeves of the opening-closing cylinder sleeve 2 are opened, after the position is found at the periphery of a wellhead, the two half cylinder sleeves are closed and locked, and then the base 1 is fixed through the fixing column 23. Then, the two adjusting rods 5 are adjusted to enable the inner cambered surfaces of the two arc-shaped fixing plates 3 to be attached to the outer wall of the wellhead. Then, the protective cover 4 is covered, and the worm gear mechanism is driven through the rocker 13, so that the protective cover 4 is locked on the base 1. The housing 14 is then lowered down through the lifting rods 9 until the wellhead upper stop 25 abuts the wellhead flange upper surface. Then, the pressure and temperature monitoring system is checked and turned on, and in this embodiment, in order to accurately position the housing 14 at the lowered position, a camera capable of connecting a video signal to the display screen 19 may be provided on the inner wall of the protective cover 4. Then, the temperature sensor 15 measures the oil temperature of the wellhead and transmits the oil temperature to the data acquisition module 17, the pressure sensor 16 measures the pressure value of the wellhead and transmits the pressure value to the data acquisition module 17, the data acquisition module 17 processes and analyzes the received data, the temperature and pressure data are packaged and processed and then transmitted to a wireless gateway in a control room through the wireless transmission module 18, and the wireless gateway can transmit the collected data of a plurality of pumping units to the DCS. Meanwhile, if the measured value has deviation from the preset value, namely, the oil pressure or the oil temperature of the well mouth suddenly changes, the alarm device can be arranged to remind the user. The pressure and temperature monitoring system of the embodiment adopts the temperature and pressure integrated design, and is shielded in the protective cover to adapt to the severe outdoor environment; the low-power-consumption technology is adopted, and the lithium battery is combined with the solar panel, so that the zero maintenance work target in use is realized; the wireless communication technology is adopted, and the signals with the radius of one kilometer are transmitted in a wireless mode, so that the construction difficulty is reduced; the remote acquisition of wellhead temperature and pressure is realized by adopting 2.4GHz international free frequency band wireless transmission, the later-period cost is not needed, a large amount of cost is saved, and the technical support is provided for oil field safety production, energy conservation and emission reduction.
Therefore, the oil field wellhead protection device provided by the invention is simple and reasonable in structure, the wellhead can be effectively protected by the protective cover, the opening-closing type barrel sleeve and the three-layer outer sleeve structure of the arc-shaped fixed plate, the wellhead is prevented from being damaged by wind and sun, the wellhead is kept vertical by the clamping action of the arc-shaped fixed plate, the wellhead is prevented from sinking, meanwhile, personnel can be effectively prevented from falling by the arrangement of the protective cover, and the safety coefficient of oil field exploitation is improved; in addition, the pressure and temperature monitoring system is combined and arranged on the protective cover to monitor the pressure and temperature of the wellhead in real time, whether the oil well is normal or not can be reminded to workers, normal production operation of the oil well is ensured, and the practicability is strong:
it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. The utility model provides an oil field well head protection device which characterized in that: the device comprises a base, an opening-closing barrel sleeve arranged above the base, an arc-shaped fixing plate arranged inside the opening-closing barrel sleeve, a protective cover covering the outside of the opening-closing barrel sleeve and a pressure and temperature monitoring system arranged at the top in the protective cover; the opening-closing type cylinder sleeve is used for being sleeved on the outer wall of a wellhead; the outer part of the arc-shaped fixing plate is connected with one end of an adjusting rod, and the other end of the adjusting rod penetrates through the cylinder wall of the opening-closing type cylinder sleeve and is in threaded connection with a U-shaped frame arranged on the outer side wall of the opening-closing type cylinder sleeve; the adjusting rod is used for radially adjusting the position of the arc-shaped fixing plate so as to enable the arc-shaped fixing plate to be tightly attached to the outer wall of a wellhead; a notch is formed in the bottom end of the interior of the protective cover, an adjustable locking rod is mounted on the base, and when the outer end of the adjustable locking rod is adjusted to be clamped into the notch, the protective cover is locked on the base; the top of the pressure and temperature monitoring system is connected with a lifting rod, the lifting rod penetrates through the top wall of the protective cover and then extends out, and is in threaded connection with a U-shaped frame arranged on the top wall in the protective cover, and the pressure and temperature monitoring system is used for monitoring the pressure and temperature of a wellhead in real time;
the arc-shaped fixing plates and the opening-closing type cylinder sleeve are coaxially arranged, and two arc-shaped fixing plates are symmetrically arranged; the top of the opening-closing type cylinder sleeve is provided with a wellhead lower stop block which is used for being connected with a wellhead flange; the opening-closing type barrel sleeve comprises two half barrel sleeves connected through a hinge, and the barrel wall of each half barrel sleeve is of a telescopic structure and used for being matched with well mouths with different heights.
2. The oilfield wellhead protection device of claim 1, wherein: the adjustable locking rod is connected with a worm gear mechanism, the worm gear mechanism comprises a worm gear and a worm meshed with the worm gear, the worm is embedded in the base, the worm gear is installed above the base, and the worm gear is driven by a rocker.
3. The oilfield wellhead protection device of claim 1, wherein: the pressure and temperature monitoring system comprises a shell, and a temperature sensor and a pressure sensor which are arranged at the bottom of the shell, wherein a data acquisition module and a wireless transmission module which are in signal connection with each sensor are arranged in the shell, and data transmitted by the wireless transmission module is received by a wireless gateway in a control room.
4. The oilfield wellhead protection device of claim 3, wherein: the pressure and temperature monitoring system is also provided with a battery module and a display screen, and the data acquisition module and the wireless transmission module are in signal connection with the display screen; the battery module comprises a solar cell panel and a lithium battery electrically connected with the solar cell panel, and the lithium battery is installed on the inner wall of the protective cover and used for supplying power to all power consumption parts.
5. The oilfield wellhead protection device of claim 4, wherein: an installation baffle is arranged on one side of the protection cover, and the solar cell panel is installed above the installation baffle; the lithium battery is installed in the outer wall of the protection cover and located below the installation baffle.
6. The oilfield wellhead protection device of claim 1, wherein: the base is fixed on the ground through the fixing column.
7. The oilfield wellhead protection device of claim 1, wherein: adjusting hand wheels are arranged at the outer ends of the adjusting rods and the lifting rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010822736.2A CN111997558B (en) | 2020-08-11 | 2020-08-11 | Oil field well head protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010822736.2A CN111997558B (en) | 2020-08-11 | 2020-08-11 | Oil field well head protection device |
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| CN111997558A CN111997558A (en) | 2020-11-27 |
| CN111997558B true CN111997558B (en) | 2023-03-14 |
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| CN202010822736.2A Active CN111997558B (en) | 2020-08-11 | 2020-08-11 | Oil field well head protection device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113123751B (en) * | 2021-06-16 | 2021-09-17 | 东营市东达机械制造有限责任公司 | Thermal recovery wellhead assembly |
| CN113882830A (en) * | 2021-09-10 | 2022-01-04 | 江苏双辉机械制造有限公司 | Energy-saving environment-friendly casing head |
| CN113833452B (en) * | 2021-09-22 | 2023-04-25 | 西安洛科电子科技股份有限公司 | Oil well load detection device for intelligent Internet of things of oil and gas field and application method thereof |
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| CN203130075U (en) * | 2013-01-16 | 2013-08-14 | 江苏苏仪集团有限公司 | Wireless measurement instrument for temperature and pressure of oil well head |
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| CN108561096A (en) * | 2018-07-02 | 2018-09-21 | 王回芳 | A kind of oil well head sealing theft protection installation |
| CN111058791A (en) * | 2019-12-18 | 2020-04-24 | 西安狮龙石油设备监理技术有限公司 | Oil well wellhead blowout preventer and system |
| CN211008626U (en) * | 2019-11-14 | 2020-07-14 | 成都海普泵业有限公司 | Pressure testing device for oil field well control device |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9621768D0 (en) * | 1996-10-18 | 1996-12-11 | Abb Seatec Ltd | Oil field apparatus |
| CN203130075U (en) * | 2013-01-16 | 2013-08-14 | 江苏苏仪集团有限公司 | Wireless measurement instrument for temperature and pressure of oil well head |
| CN104963644A (en) * | 2015-06-12 | 2015-10-07 | 中国石油天然气股份有限公司 | Oil well mouth protecting device |
| CN207892576U (en) * | 2018-01-21 | 2018-09-21 | 江苏苏盐阀门机械有限公司 | A kind of well mouth of oil well anti-oil leakage device |
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| CN211008626U (en) * | 2019-11-14 | 2020-07-14 | 成都海普泵业有限公司 | Pressure testing device for oil field well control device |
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| CN111997558A (en) | 2020-11-27 |
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