CN114482903A - Oil well head self-sealing blowout preventer - Google Patents
Oil well head self-sealing blowout preventer Download PDFInfo
- Publication number
- CN114482903A CN114482903A CN202111621036.8A CN202111621036A CN114482903A CN 114482903 A CN114482903 A CN 114482903A CN 202111621036 A CN202111621036 A CN 202111621036A CN 114482903 A CN114482903 A CN 114482903A
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- China
- Prior art keywords
- oil well
- fixedly connected
- well body
- oil
- cylinder
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Classifications
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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
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
- Y02A20/204—Keeping clear the surface of open water from oil spills
Abstract
The invention relates to the technical field of oil well head equipment, in particular to a self-sealing blowout preventer of an oil well head; the oil well comprises a base, the oil well body, the fixture block frame, the floater, the stand, the crossbeam, salvage the subassembly and from sealing the subassembly, set up in the top of base through the oil well body, the fixture block frame sets up in the inside lateral wall of oil well body, the floater sets up in the below of fixture block frame, two stands set up respectively in the both sides limit of base relatively, the crossbeam sets up in the top of stand, salvage the subassembly and set up in the top of crossbeam, when needs are salvaged the inside oil of oil well body, just start the subassembly of proclaiming oneself of oil well body top, open the oil well body, afterwards, restart and salvage the subassembly, it just salvages its oil of oil well body inside to salvage the subassembly, it is very convenient.
Description
Technical Field
The invention relates to the technical field of oil well head equipment, in particular to a self-sealing blowout preventer of an oil well head.
Background
In many onshore oil fields in China, due to long-term exploitation, a certain part of oil wells enter a low-pressure and low-yield period, insufficient liquid supply occurs, and the normal work of the oil pumping unit cannot be met. In addition, the conventional pumping units for low-yield wells and remote wells are used for oil extraction, so that the oil extraction cost is increased due to low yield and high capital investment, and the comprehensive economic benefit is poor. In order to economically exploit the part of oil wells and reduce the oil extraction cost, the vehicle-mounted oil pumping device is adopted to drag oil, compared with the conventional mechanical oil extraction mode, a large amount of ground equipment such as a tee joint, an oil pumping machine and the like can be saved, and meanwhile, underground equipment such as an oil well pump, an oil pumping rod, a thousands of meters of oil pipes and the like can be saved.
When fishing for oil after the current oil bailing well head self-sealing blowout preventer is opened, it is inconvenient to fish for to reduce the practicality.
Disclosure of Invention
The invention aims to provide a self-sealing blowout preventer for an oil fishing wellhead, and aims to solve the technical problem that the prior self-sealing blowout preventer for an oil fishing wellhead is inconvenient to fish when oil is fished after being opened, so that the practicability is reduced.
In order to achieve the purpose, the oil bailing wellhead self-sealing blowout preventer comprises a base, an oil well body, a fixture block frame, two floating balls, two upright columns, a cross beam, a bailing assembly and a self-sealing assembly, wherein the oil well body is arranged above the base, the fixture block frame is fixedly connected with the oil well body and is positioned on the inner side wall of the oil well body, the floating balls are movably connected with the oil well body and are positioned below the fixture block frame, the two upright columns are respectively fixedly connected with the base and are positioned on two side edges of the oil well body, the cross beam is fixedly connected with the upright columns and is positioned above the upright columns, the bailing assembly is fixedly connected with the cross beam and is positioned above the cross beam and corresponds to the oil well body, and the self-sealing assembly is fixedly connected with the upright columns, and is positioned above the oil well body;
the fishing component comprises a first cylinder, a fishing rod, a connecting plate, a placing box, a placing sleeve and an oil cylinder, the first cylinder is fixedly connected with the cross beam and is positioned above the cross beam, one end of the fishing rod is fixedly connected with the output end of the first cylinder, the other end of the fishing rod is fixedly connected with the connecting plate, the placing box is fixedly connected with the connecting plate and is positioned below the connecting plate, the placing sleeve is fixedly connected with the placing box and is positioned inside the placing box, and the oil cylinder is movably connected with the placing box and is positioned inside the placing sleeve.
The oil well body set up in the top of base, the fixture block frame set up in the inside lateral wall of oil well body, the floater set up in the below of fixture block frame, two stand set up respectively relatively in the both sides limit of base, the crossbeam set up in the top of stand, the subassembly of fishing set up in the top of crossbeam, when needs are right the oil of the inside of oil well body is salvaged, just starts the subassembly of proclaiming oneself above the oil well body, will the oil well body is opened, afterwards, restarts the subassembly of fishing, the subassembly of fishing just salvages the oil of its oil well body inside, and is very convenient.
The fishing assembly further comprises a connecting sleeve, the connecting sleeve is fixedly connected with the connecting plate and located above the connecting plate, and the connecting sleeve is sleeved outside the fishing rod.
The connecting sleeve is sleeved outside the fishing rod and can strengthen the connection between the fishing rod and the connecting plate, so that the service life is prolonged.
The fishing assembly further comprises two groups of abutting structures, and the two groups of abutting structures are respectively and oppositely arranged on two side edges of the oil cylinder.
The oil cylinders of the two groups of abutting structures can be abutted.
The oil cylinder comprises an oil cylinder body, a spring, a chock block, a propping rod and a propping plate, wherein the oil cylinder body is fixedly connected with the placing box and is positioned on the inner side wall of the placing box, the spring is arranged in the oil cylinder body, the chock block is movably connected with the oil cylinder body and is positioned on the side edge of the spring, one end of the propping rod is fixedly connected with the chock block, the other end of the propping rod penetrates through the oil cylinder body and is fixedly connected with the propping plate, and the propping plate is positioned on the side edge of the oil cylinder.
The supporting component can enhance the supporting effect and improve the practicability.
Wherein, it includes second cylinder, extension rod, fixed plate, steel sheet and slide rail to proclaim oneself the subassembly, the side of oil well body has the opening, the quantity of slide rail is two, two the slide rail respectively relative set up in the inside lateral wall of oil well body, and be located the opening part, the second cylinder with stand fixed connection, and be located the side of stand, the one end of extension rod with the output fixed connection of second cylinder, the other end of extension rod with fixed plate fixed connection, one side of steel sheet with fixed plate fixed connection, and be located the side of fixed plate, the opposite side of steel sheet runs through the opening, and with slide rail sliding connection.
The self-sealing assembly can open and close the oil well body, so that the fishing assembly is convenient to fish, and is very convenient and fast.
The self-sealing assembly further comprises a sealing frame, wherein the sealing frame is fixedly connected with the fixing plate, is positioned on the side edge of the fixing plate and is positioned on the side edge of the steel plate.
The sealing frame is arranged on the side edge of the steel plate, and when the steel plate is inserted into the oil well body, the sealing frame can strengthen sealing, so that the sealing effect is strengthened.
The oil well mouth self-sealing blowout preventer is characterized in that the oil well body is arranged above the base, the fixture block frame is arranged on the inner side wall of the oil well body, the floating ball is arranged below the fixture block frame, the two upright posts are respectively arranged on two side edges of the base oppositely, the cross beam is arranged above the upright posts, the fishing assembly is arranged above the cross beam, when oil in the oil well body needs to be fished, the self-sealing assembly above the oil well body is started to open the oil well body, then the first air cylinder of the fishing assembly is started, the output end of the first air cylinder drives the fixedly connected fishing rod to extend, the fishing rod extends the fixedly connected connecting plate, and the fixedly connected placing box extends into the oil well body, the oil well comprises an oil well body, a placing sleeve, a floating ball, a clamping block frame, a fishing rod, a fishing sleeve and an oil cylinder, wherein the placing sleeve is arranged inside the placing box and can support and stabilize the oil cylinder, the placing box is just right inside the oil well body, the floating ball is pressed downwards to the bottom, oil inside the oil well is just upwards moved along with the pressing of the floating ball and is injected into the placing box, the oil cylinder is filled with the oil cylinder, then the fishing component is just started, the output end of the first air cylinder of the fishing component is just fixedly connected with the fishing rod to shrink, so that the placing box is just fixedly connected and is extracted from the oil well body, the oil inside the oil well body can be fished, and the oil well is very convenient and convenient to improve the practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a self-sealing blowout preventer of a fishing wellhead.
Fig. 2 is a front view of a self-sealing blowout preventer of a fishing wellhead of the present invention.
Fig. 3 is a side view of a bailing wellhead self-sealing blowout preventer of the present invention.
Fig. 4 is a cross-sectional view of the a-a line structure of fig. 3 of the present invention.
Fig. 5 is a partial enlarged view of the present invention at B of fig. 4.
Fig. 6 is a partial enlarged view of the present invention at C of fig. 4.
1-base, 2-oil well body, 3-fixture frame, 4-floating ball, 5-upright post, 6-cross beam, 7-fishing component, 71-first cylinder, 72-fishing rod, 73-connecting plate, 74-placing box, 75-placing sleeve, 76-oil cylinder, 77-connecting sleeve, 78-abutting structure, 781-cylinder body, 782-spring, 783-a chock block, 784-a supporting rod, 785-a supporting plate, 8-a self-sealing component, 81-a second cylinder, 82-an extension rod, 83-a fixing plate, 84-a steel plate, 85-a sliding rail, 86-an opening, 87-a sealing frame, 88-a supporting frame, 9-a buffer component, 91-a bump, 92-a buffer column and 93-a connecting rod.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 6, the invention provides a bailing wellhead self-sealing blowout preventer, which comprises a base 1, an oil well body 2, a fixture block frame 3, a floating ball 4, upright columns 5, a cross beam 6, a bailing assembly 7 and a self-sealing assembly 8, wherein the oil well body 2 is arranged above the base 1, the fixture block frame 3 is fixedly connected with the oil well body 2 and is positioned on the inner side wall of the oil well body 2, the floating ball 4 is movably connected with the oil well body 2 and is positioned below the fixture block frame 3, the number of the upright columns 5 is two, the two upright columns 5 are respectively and fixedly connected with the base 1 and are positioned on the two side edges of the oil well body 2, the cross beam 6 is fixedly connected with the upright columns 5 and is positioned above the upright columns 5, and the bailing assembly 7 is fixedly connected with the cross beam 6, the self-sealing assembly 8 is fixedly connected with the upright post 5 and is positioned above the oil well body 2;
the fishing assembly 7 comprises a first cylinder 71, a fishing rod 72, a connecting plate 73, a placing box 74, a placing sleeve 75 and an oil cylinder 76, wherein the first cylinder 71 is fixedly connected with the cross beam 6 and is positioned above the cross beam 6, one end of the fishing rod 72 is fixedly connected with the output end of the first cylinder 71, the other end of the fishing rod 72 is fixedly connected with the connecting plate 73, the placing box 74 is fixedly connected with the connecting plate 73 and is positioned below the connecting plate 73, the placing sleeve 75 is fixedly connected with the placing box 74 and is positioned inside the placing box 74, and the oil cylinder 76 is movably connected with the placing box 74 and is positioned inside the placing sleeve 75.
In this embodiment, the oil well body 2 is disposed above the base 1, the fixture frame 3 is disposed on the inner side wall of the oil well body 2, the floating ball 4 is disposed below the fixture frame 3, the two upright posts 5 are disposed on two opposite sides of the base 1, the cross beam 6 is disposed above the upright posts 5, the fishing assembly 7 is disposed above the cross beam 6, when oil in the oil well body 2 needs to be fished, the self-sealing assembly 8 above the oil well body 2 is activated to open the oil well body 2, then the first cylinder 71 of the fishing assembly 7 is activated again, the output end of the first cylinder 71 drives the fishing rod 72 fixedly connected to extend, the fishing rod 72 extends the connecting plate 73 fixedly connected to extend, the connecting plate 73 extends the placing box 74 fixedly connected to the inside of the oil well body 2, the placing sleeve 75 is disposed inside the placing box 74, and can support and stabilize the oil cylinder 76, the placing box 74 presses down the floating ball 4 inside the oil well body 2, the floating ball 4 is pressed down to the bottom through the fixture block frame 3, oil inside the oil well moves up along with the pressing down of the floating ball 4, the oil cylinder 76 is filled with the oil, the fishing assembly 7 is started, the output end of the first air cylinder 71 of the fishing assembly 7 contracts the fishing rod 72 fixedly connected, and therefore the placing box 74 fixedly connected is extracted from the oil well body 2, oil inside the oil well body 2 can be fished conveniently, and therefore practicability is improved.
Further, the fishing assembly 7 further comprises a connecting sleeve 77, the connecting sleeve 77 is fixedly connected with the connecting plate 73 and is located above the connecting plate 73, and the connecting sleeve 77 is sleeved outside the fishing rod 72;
the fishing assembly 7 further comprises two groups of abutting structures 78, the number of the abutting structures 78 is two, and the two groups of abutting structures 78 are respectively and oppositely arranged on two side edges of the oil cylinder 76;
each group of the abutting structure 78 includes a cylinder 781, a spring 782, a plunger 783, an abutting rod 784 and an abutting plate 785, the cylinder 781 is fixedly connected with the placing box 74 and is located on the inner side wall of the placing box 74, the spring 782 is arranged inside the cylinder 781, the plunger 783 is movably connected with the cylinder 781 and is located on the side edge of the spring 782, one end of the abutting rod 784 is fixedly connected with the plunger 783, the other end of the abutting rod 784 penetrates through the cylinder 781 and is fixedly connected with the abutting plate 785, and the abutting plate 785 is located on the side edge of the oil cylinder 76.
In this embodiment, the connecting sleeve 77 is fitted around the fishing rod 72 to reinforce the connection between the fishing rod 72 and the connecting plate 73, thereby prolonging the service life and improving the practicability, the two groups of abutting structures 78 are respectively and oppositely arranged on the two side edges of the oil cylinder 76, the locked oil cylinder 76 can be stably clamped, thereby preventing the oil cylinder 76 from falling off, when the abutting plate 785 abuts and fixes the oil cylinder 76, the support rod 784 supports it, the stopper 783 is disposed inside the cylinder 781, the spring 782 on the side of the stopper 783 resists rebound, enhancing upward movement of the stopper 783, the stopper 783 moves the supporting rod 784, and the supporting rod 784 reinforces the supporting of the supporting plate 785, so that the supporting plate 785 reinforces the supporting effect on the oil cylinder 76.
Further, the self-sealing assembly 8 includes a second cylinder 81, an extension rod 82, a fixing plate 83, a steel plate 84 and two slide rails 85, an opening 86 is formed in a side edge of the oil well body 2, the number of the slide rails 85 is two, the two slide rails 85 are respectively and oppositely disposed on an inner side wall of the oil well body 2 and located at the opening 86, the second cylinder 81 is fixedly connected with the column 5 and located at a side edge of the column 5, one end of the extension rod 82 is fixedly connected with an output end of the second cylinder 81, the other end of the extension rod 82 is fixedly connected with the fixing plate 83, one side of the steel plate 84 is fixedly connected with the fixing plate 83 and located at a side edge of the fixing plate 83, and the other side of the steel plate 84 penetrates through the opening 86 and is slidably connected with the slide rails 85;
the self-sealing assembly 8 further comprises a sealing frame 87, wherein the sealing frame 87 is fixedly connected with the fixing plate 83, is positioned at the side edge of the fixing plate 83, and is positioned at the side edge of the steel plate 84;
the self-sealing assembly 8 further comprises a supporting frame 88, the supporting frame 88 is fixedly connected with the upright post 5 and is positioned on the inner side of the upright post 5, and the supporting frame 88 is sleeved outside the second cylinder 81.
In this embodiment, when the fishing assembly 7 is used for fishing, the second cylinder 81 of the self-sealing assembly 8 is started, the upright post 5 supports the second cylinder 81, the output end of the second cylinder 81 contracts the extension rod 82 fixedly connected therewith, the extension rod 82 contracts to drive the fixing plate 83 fixedly connected therewith to contract, so that the fixing plate 83 drives the steel plate 84 fixedly connected therewith, the steel plate 84 slides from the slide rail 85 arranged on two sides inside the oil well body 2, and then is drawn out from the opening 86 arranged on the side of the oil well body 2, so that the fishing assembly 7 can conveniently fish the oil inside the oil well body 2, which is very convenient and fast, the sealing frame 87 is arranged on the side of the fixing plate 83 to frame the steel plate 84, when the steel plate 84 is pushed into the oil well body 2 through the opening 86, the sealing frame 87 can assist the fixing plate 83 to seal the oil well body 2, so as to prevent oil from flowing out, the supporting frame 88 is sleeved outside the second cylinder 81, so that the connection between the second cylinder 81 and the upright post 5 can be enhanced, the second cylinder 81 is assisted, the protection of the second cylinder 81 is enhanced, and the service life is prolonged.
Further, the oil well head self-sealing blowout preventer further comprises a buffer assembly 9, wherein the buffer assembly 9 is fixedly connected with the oil well body 2 and is positioned below the floating ball 4;
In this embodiment, the buffer component 9 is disposed below the floating ball 4, when oil comes from below, the buffer component 9 can buffer the oil, the buffer column 92 is disposed inside the oil well body 2, the two bumps 91 are disposed on the inner side wall of the oil well body 2, the bumps 91 and the buffer columns 92 are connected through the plurality of connecting rods 93, when the oil comes up from inside the oil well body 2, the buffer column 92 buffers the oil coming from the oil well body, and then the buffer column 92 moves up through the side of the buffer column 92 and moves up to the connecting rod 93 connected with the buffer column, so as to enhance the buffer effect, enhance the protection of the self-sealing component 8 above, and prolong the service life of the self-sealing component.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A self-sealing blowout preventer of a fishing wellhead, which is characterized in that,
the oil well head self-sealing blowout preventer comprises a base, an oil well body, a clamping block frame, a floating ball, an upright post, a cross beam, a fishing component and a self-sealing component, the oil well body is arranged above the base, the fixture block frame is fixedly connected with the oil well body, and is positioned on the inner side wall of the oil well body, the floating ball is movably connected with the oil well body, and is positioned below the fixture block frame, the number of the upright posts is two, the two upright posts are respectively and fixedly connected with the base, and are positioned at two side edges of the oil well body, the cross beam is fixedly connected with the upright column and positioned above the upright column, the fishing component is fixedly connected with the cross beam and positioned above the cross beam, the self-sealing assembly corresponds to the oil well body, is fixedly connected with the upright column and is positioned above the oil well body;
the fishing component comprises a first cylinder, a fishing rod, a connecting plate, a placing box, a placing sleeve and an oil cylinder, the first cylinder is fixedly connected with the cross beam and is positioned above the cross beam, one end of the fishing rod is fixedly connected with the output end of the first cylinder, the other end of the fishing rod is fixedly connected with the connecting plate, the placing box is fixedly connected with the connecting plate and is positioned below the connecting plate, the placing sleeve is fixedly connected with the placing box and is positioned inside the placing box, and the oil cylinder is movably connected with the placing box and is positioned inside the placing sleeve.
2. The self-sealing blowout preventer of claim 1, wherein,
the fishing component further comprises a connecting sleeve, the connecting sleeve is fixedly connected with the connecting plate and located above the connecting plate, and the connecting sleeve is sleeved outside the fishing rod.
3. The bailing wellhead self-sealing blowout preventer of claim 2,
the fishing assembly further comprises two groups of abutting structures, and the two groups of abutting structures are respectively and oppositely arranged on two side edges of the oil cylinder.
4. The self-sealing blowout preventer of claim 3, wherein,
each group of the supporting structure comprises a cylinder body, a spring, a chock block, a supporting rod and a supporting plate, the cylinder body is fixedly connected with the placing box and is positioned on the inner side wall of the placing box, the spring is arranged in the cylinder body, the chock block is movably connected with the cylinder body and is positioned on the side edge of the spring, one end of the supporting rod is fixedly connected with the chock block, the other end of the supporting rod penetrates through the cylinder body and is fixedly connected with the supporting plate, and the supporting plate is positioned on the side edge of the oil cylinder.
5. The bailing wellhead self-sealing blowout preventer of claim 4,
the utility model discloses a well self-sealing component, including oil well body, valve seat, and the valve seat.
6. The self-sealing blowout preventer of claim 5, wherein,
the self-sealing assembly further comprises a sealing frame, wherein the sealing frame is fixedly connected with the fixing plate, is positioned on the side edge of the fixing plate and is positioned on the side edge of the steel plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111621036.8A CN114482903B (en) | 2021-12-28 | 2021-12-28 | Self-sealing blowout preventer for oil well head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111621036.8A CN114482903B (en) | 2021-12-28 | 2021-12-28 | Self-sealing blowout preventer for oil well head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114482903A true CN114482903A (en) | 2022-05-13 |
| CN114482903B CN114482903B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111621036.8A Active CN114482903B (en) | 2021-12-28 | 2021-12-28 | Self-sealing blowout preventer for oil well head |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037662A (en) * | 1976-08-30 | 1977-07-26 | Leslie Bowling | Automated bailing apparatus in flexible combination for bailing shallow wells |
| CN202689995U (en) * | 2012-06-17 | 2013-01-23 | 杨光 | Hydraulic bridge type oil-fishing wellhead sealer |
| CN203239269U (en) * | 2013-03-29 | 2013-10-16 | 中国石油天然气股份有限公司 | Self-sealing blowout-preventing device for oil fishing wellhead |
| CN205840838U (en) * | 2016-05-31 | 2016-12-28 | 康玉宝 | Fluid pressure type Long travel bailing wellhead sealer |
| CN212614624U (en) * | 2020-08-05 | 2021-02-26 | 大庆鑫茹科技有限公司 | Bailing oil production wellhead blowout prevention switch |
-
2021
- 2021-12-28 CN CN202111621036.8A patent/CN114482903B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4037662A (en) * | 1976-08-30 | 1977-07-26 | Leslie Bowling | Automated bailing apparatus in flexible combination for bailing shallow wells |
| CN202689995U (en) * | 2012-06-17 | 2013-01-23 | 杨光 | Hydraulic bridge type oil-fishing wellhead sealer |
| CN203239269U (en) * | 2013-03-29 | 2013-10-16 | 中国石油天然气股份有限公司 | Self-sealing blowout-preventing device for oil fishing wellhead |
| CN205840838U (en) * | 2016-05-31 | 2016-12-28 | 康玉宝 | Fluid pressure type Long travel bailing wellhead sealer |
| CN212614624U (en) * | 2020-08-05 | 2021-02-26 | 大庆鑫茹科技有限公司 | Bailing oil production wellhead blowout prevention switch |
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| Publication number | Publication date |
|---|---|
| CN114482903B (en) | 2023-08-22 |
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