CN113063043A - Underwater hydraulic connector for ocean - Google Patents
Underwater hydraulic connector for ocean Download PDFInfo
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- CN113063043A CN113063043A CN202110219647.3A CN202110219647A CN113063043A CN 113063043 A CN113063043 A CN 113063043A CN 202110219647 A CN202110219647 A CN 202110219647A CN 113063043 A CN113063043 A CN 113063043A
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- shoulder
- driving piston
- shell
- hydraulic connector
- outer shell
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L17/00—Joints with packing adapted to sealing by fluid pressure
- F16L17/10—Joints with packing adapted to sealing by fluid pressure the packing being sealed by the pressure of a fluid other than the fluid in or surrounding the pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses an underwater hydraulic connector for ocean, which comprises: the outer side of the top of the central shell is provided with an annular first shoulder extending to the outside of the central shell; the outer shell is sleeved outside the lower part of the central shell, and the top of the outer shell is fixedly connected with the bottom of the first shoulder; a second shoulder extending to the outside of the driving piston is arranged on the outer side of the top of the driving piston; the locking blocks are arranged uniformly around the outer circumferential surface of the outer shell and are arranged between the central shell and the driving piston; the driving piston head is fixedly sleeved on the outer side of the bottom end of the driving piston and is in contact with and sealed with the inner side wall of the outer shell; an annular fourth shoulder is arranged in the middle of the inner side of the outer shell, and the unlocking piston is positioned above the fourth shoulder and is arranged between the outer shell and the driving piston; the unlocking lifting rod penetrates through the first shoulder and is fixedly connected with the top of the second shoulder. The hydraulic connector has good sealing effect, and quick connection or disconnection can be realized by combining multiple unlocking modes.
Description
Technical Field
The invention relates to the technical field of deepwater drilling and production, in particular to an underwater marine hydraulic connector.
Background
The ocean contains rich oil and gas resources, and the exploitation of deep water and ultra-deep water oil and gas is rapidly increased along with the gradual reduction of land resources, so that the ocean has a wide prospect and also faces huge risks and challenges. Therefore, the demand for equipment suitable for deep water exploration and exploitation is increasing.
The marine underwater hydraulic connector is an underwater key device and can ensure the normal operation of marine drilling. The connecting device is mainly applied to connection or disconnection of key parts of underwater equipment, and is an important component of an underwater blowout preventer stack (drilling and completion), an underwater Christmas tree (production) and an emergency well shut-in device (underwater emergency rescue). At present, the connector is monopolized by several foreign equipment manufacturers in the technology and market, the product price is high, the delivery period is long, the connector is one of the bottlenecks which restrict the key technical equipment of deep water oil and gas exploration and development in China, the sealing effect of the currently used connector is poor, and unlocking is not easy to realize when hydraulic power fails.
Therefore, the research on the marine underwater hydraulic connector which has a good sealing effect and can realize quick connection or disconnection by combining multiple unlocking modes is a problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides the marine underwater hydraulic connector which is good in sealing effect and can realize quick connection or disconnection by combining multiple unlocking modes.
In order to achieve the purpose, the invention adopts the following technical scheme:
a marine subsea hydraulic connector, comprising:
the central shell is cylindrical, and a connecting hole is formed in the center of the central shell; the outer side of the top of the central shell is provided with an annular first shoulder extending to the outside of the central shell, and the first shoulder is integrally connected with the central shell;
the inner part of the outer shell is hollow, the outer side of the lower part of the central shell is sleeved with the outer shell, and the top of the outer shell is fixedly connected with the bottom of the first shoulder;
the driving piston is sleeved between the central shell and the outer shell; a second shoulder extending to the outside of the driving piston is arranged on the outer side of the top of the driving piston, and the outer circumferential surface of the second shoulder is in contact with and sealed with the inner side surface of the outer shell;
the locking blocks are arranged uniformly around the outer circumferential surface of the outer shell and are arranged between the central shell and the driving piston; a shoulder is arranged on the outer side face of the bottom end of the central shell, a first notch matched with the third shoulder is formed in one side, in contact with the central shell, of the locking block, and the third shoulder is arranged at the first notch; the other side of the locking block is in contact with the surface of the driving piston; the top of one side, in contact with the driving piston, of the locking block is provided with a second notch adaptive to the shape of the second shoulder, and the second notch is arranged above the second shoulder;
the driving piston head is fixedly sleeved on the outer side of the bottom end of the driving piston and is in contact with and sealed with the inner side wall of the outer shell;
the middle part of the inner side of the outer shell is provided with an annular fourth shoulder, and the unlocking piston is positioned above the fourth shoulder, is arranged between the outer shell and the driving piston and is sealed with the contact surfaces of the outer shell and the driving piston;
the unlocking lifting rod penetrates through the first shoulder and is fixedly connected with the top of the second shoulder.
The hydraulic connector has the advantages that the primary unlocking cavity and the secondary unlocking cavity are formed between the driving piston and the unlocking piston or between the unlocking piston and the third shoulder, the unlocking lifting rod forms the third unlocking, the hydraulic connector is provided with three unlocking modes, the operation is convenient, the unlocking reliability is high, and the sealing effect of the connector is good.
Preferably, the inner wall of the bottom end of the connecting hole of the central shell is provided with a first sealing surface and a second sealing surface, a steel ring is connected between the bottom end of the central shell and a wellhead or a mandrel, and the steel ring is connected with the bottom end of the connecting hole in a sealing manner. The steel ring and the first sealing surface or the second sealing surface can be connected by replacing the steel rings with different sizes, and the steel ring can be continuously used by replacing the steel ring after one of the sealing surfaces is damaged, so that the sealing effect is good, the operation is convenient, and the safety and the reliability are realized.
Preferably, an open locking ring is arranged at one end of the driving piston, which is in contact with the driving piston head, a step which is recessed towards the inner side of the driving piston head is arranged at one side of the driving piston head, which is in contact with the open locking ring, and the step of the driving piston head is arranged at the top of the open locking ring. The driving piston and the driving piston head can be connected together through the open locking ring, so that the driving piston head moves up and down along with the driving piston and the mounting of the driving piston head is facilitated.
Preferably, a display rod penetrates through the top of the first shoulder, and the display rod penetrates through the first shoulder to abut against the top of the second shoulder; the display rod is fixed with a first spring seat at the joint of the top of the first shoulder and the display rod, the display rod penetrates through the inside of the first spring seat, a second spring seat is arranged at the bottom end of the display rod, a first spring is sleeved on the outer side of the display rod, and two ends of the first spring are respectively abutted to the first spring seat and the second spring seat. The locking or opening state of the hydraulic connector can be reflected by the up-and-down movement of the display rod, and the up-and-down movement process of the display rod is smoother due to the arrangement of the first spring.
Preferably, a pull rope is connected to the top of the display rod, and a display device is connected to the other end of the pull rope, and the display device includes: the display device comprises a display panel, an indication circular plate, an indication rod, a fixed cylinder, a connecting cylinder and a second spring; the connecting cylinder is fixedly connected with the bottom of the fixed cylinder, two ends of the connecting cylinder and two ends of the fixed cylinder are both in an open shape and are fixed inside the display panel, the indicating rod penetrates through the connecting cylinder and the fixed cylinder, the top of the indicating rod is fixedly connected with the indicating circular plate, the outer surface of the indicating rod is provided with a third spring seat, the third spring seat is arranged in an inner cavity of the fixed cylinder, a second spring is sleeved outside the indicating rod, one end of the second spring abuts against the bottom of the third spring seat, and the other end of the second spring abuts against the top end face of the connecting cylinder; the surface of the display panel is provided with an observation window, and the indication circular plate is arranged at the observation window. The display rod can be vertically moved through the pull rope to further pull the indicating rod to vertically move, the moving position of the indicating circular plate can be observed through the observation window, and therefore workers on the ground can conveniently acquire the locking or opening state of the hydraulic connector.
Preferably, the top of the first shoulder is uniformly provided with a plurality of flushing pipelines, the top of each flushing pipeline is connected with an oil line connector, the bottom of each flushing pipeline is connected with an oil line nozzle, and liquid sprayed by the oil line nozzles acts between the driving piston and the locking block. The hydrate inhibitor is introduced into the flushing pipeline, so that the hydrate can be prevented from being formed around the locking mechanism in the hydraulic connector in the using process, and the deep water working condition can be adapted.
Preferably, a plurality of oil passages are uniformly formed in the top of the first shoulder, penetrate through the first shoulder and the outer shell and are communicated between the unlocking piston and the fourth shoulder or between the driving piston and the unlocking piston. Through letting in hydraulic oil in the oil circuit to the difference, can realize the unblock to hydraulic connector different modes, also can discharge the hydraulic oil in the hydraulic connector in the oil circuit simultaneously, realize hydraulic connector's locking.
Preferably, the bottom fixedly connected with annular connecting plate of shell body, the bottom of connecting plate sets up flexible sealing member, flexible sealing member is fixed in through annular clamp plate the bottom of connecting plate, flexible sealing member middle part is equipped with the opening, cup joints in the outside of well head or dabber, and sealed with the outer wall of well head or dabber. The flexible seal may prevent hydrates from entering the interior of the hydraulic connector during installation.
Preferably, the locking block comprises: the locking body is respectively contacted with the third shoulder and the driving piston, and the first notch and the second notch are arranged on the locking body. The connection of different well heads or mandrels is conveniently realized by replacing clamping blocks of different models.
Preferably, the contact surface of the driving piston and the inner wall of the outer shell, the contact surface of the unlocking piston and the outer shell or the driving piston, the contact surface of the fourth shoulder end surface and the driving piston, and the contact surface of the driving piston head and the driving piston or the inner wall of the outer shell are all provided with sealing pieces, and the top of the contact surface of the driving piston and the inner wall of the outer shell, and the bottom of the contact surface of the driving piston head and the inner wall of the outer shell are all provided with sand scraping and dust removing rings. The hydraulic connector adopts a redundant sealing design technology, so that the hydraulic connector is safer and more reliable in an underwater use process.
According to the technical scheme, compared with the prior art, the invention discloses and provides an underwater marine hydraulic connector, which has the beneficial effects that:
(1) the hydraulic connector adopts a redundant sealing design technology, so that the first sealing surface is damaged underwater, sealing can be completed by replacing a standby sealing surface, and safety and reliability are realized;
(2) the hydraulic connector has hydraulic control, is convenient to operate, has three times of unlocking, and can be opened by pulling the unlocking lifting rod when hydraulic power fails, so that the unlocking reliability is high;
(3) the hydraulic connector can be connected with different types of well heads or mandrels, and has wide application range and strong applicability;
(4) the hydraulic connector can prevent hydrate from entering and forming during use, and is suitable for deep water and ultra-deep working conditions;
(5) the locking and unlocking states of the hydraulic connector can be displayed locally and remotely, and the hydraulic connector can be widely applied to working conditions such as underwater production, well drilling and completion, well workover, underwater emergency rescue and the like.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a cross-sectional view of one type of wellhead connection of the hydraulic connector provided by the present invention;
FIG. 2 is a cross-sectional view of another type of wellhead connection of the hydraulic connector provided by the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
FIG. 4 is a top view of a hydraulic connector provided by the present invention;
FIG. 5 is a cross-sectional view taken at B-B of FIG. 4 in accordance with the present invention;
fig. 6 is a schematic view of the internal structure of a display device in the hydraulic connector according to the present invention;
FIG. 7 is a schematic structural view of a first locking block in the hydraulic connector according to the present invention;
FIG. 8 is a schematic structural view of a second type of locking block in the hydraulic connector of the present invention;
FIG. 9 is a schematic view of a third type of locking block in the hydraulic connector of the present invention;
fig. 10 is a schematic structural view of a fourth locking block in the hydraulic connector according to the present invention.
Wherein, in the figure,
1-a central housing;
11-a first shoulder; 12-a third shoulder; 13-a first sealing surface; 14-a second sealing surface; 15-steel ring; 16-a first spring seat; 17-flushing the pipeline; 18-oil line connection; 19-oil line nozzle; 110-oil path;
2-an outer shell;
21-a fourth shoulder; 22-a connecting plate; 23-a flexible seal; 24-an annular platen;
3-a drive piston;
31-a second shoulder; 32-opening locking ring;
4-a locking block;
41-a first notch; 42-a second notch; 43-a locking body; 44-a fixture block;
5-driving the piston head;
51-a retaining ring;
6-unlocking the piston; 7-unlocking the lifting rod;
8-display rod;
81-a second spring seat; 82-a first spring;
9-pulling a rope;
10-a display device;
101-a display panel; 102-indicating circular plate; 103-an indicator stem; 104-a fixed cylinder; 105-a connector barrel; 106-a second spring; 107-a third spring seat; 108-a viewing window; 109-a fixed plate;
011-a seal; 012-sand scraping and dust removing ring; 013-well head or mandrel; 014-guide ring.
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.
The embodiment of the invention discloses an underwater hydraulic connector for ocean, which comprises:
the center shell 1 is cylindrical, and a connecting hole is formed in the center of the center shell 1; an annular first shoulder 11 extending towards the outside of the central shell 1 is arranged on the outer side of the top of the central shell 1, and the first shoulder 11 is integrally connected with the central shell 1;
the inner part of the outer shell 2 is hollow, the outer shell 2 is sleeved outside the lower part of the central shell 1, and the top of the outer shell 2 is fixedly connected with the bottom of the first shoulder 11;
the driving piston 3 is sleeved between the central shell 1 and the outer shell 2; a second shoulder 31 extending to the outside of the driving piston 3 is arranged on the outer side of the top of the driving piston 3, and the outer circumferential surface of the second shoulder 31 is in contact with and sealed with the inner side surface of the outer shell 2;
a plurality of locking blocks 4 are arranged, are uniformly distributed around the outer circumferential surface of the outer shell 2 and are arranged between the central shell 1 and the driving piston 3; a third shoulder 12 is arranged on the outer side surface of the bottom end of the central shell 1, a first notch 41 matched with the third shoulder 12 is arranged on one side, in contact with the central shell 1, of the locking block 4, and the third shoulder 12 is arranged at the first notch 41; the other side of the locking block 4 is in contact with the surface of the driving piston 3; the top of the side, which is in contact with the driving piston 3, of the locking block 4 is provided with a second notch 42 which is adaptive to the shape of the second shoulder 31, and the second notch 42 is arranged above the second shoulder 31;
the driving piston head 5 is fixedly sleeved on the outer side of the bottom end of the driving piston 3, and the driving piston head 5 is in contact with and sealed with the inner side wall of the outer shell 2;
the unlocking piston 6 is arranged, an annular fourth shoulder 21 is arranged in the middle of the inner side of the outer shell 2, the unlocking piston 6 is positioned above the fourth shoulder 21, is arranged between the outer shell 2 and the driving piston 3, and is sealed with the contact surfaces of the outer shell 2 and the driving piston 3;
the unlocking lifting rod 7 penetrates through the first shoulder 11 and is fixedly connected with the top of the second shoulder 31.
In order to further optimize the technical scheme, the contact surfaces of the driving piston 3 and the locking block 4 are inclined surfaces which are matched with each other, so that the driving piston 3 can drive the first notch 41 of the locking block 4 to rotate at the top of the third shoulder 12 when moving upwards, unlocking of the locking block 4 is realized, and the driving piston 3 drives the locking block 4 to rotate to realize locking action when moving downwards.
In order to further optimize the above technical solution, when the wellhead or the mandrel in fig. 1 is connected, a guide ring 014 is provided at the bottom of the center housing 1 to facilitate the insertion of the wellhead and the mandrel 013 and to guide the same, when the wellhead and the mandrel 013 in fig. 2 are connected, due to the structure of the wellhead and the mandrel 013, the insertion is easy, and the position is accurately found, so that the guide ring 014 is not required.
In order to further optimize the technical scheme, a first sealing surface 13 and a second sealing surface 14 are arranged on the inner wall of the bottom end of a connecting hole of the central shell 1, a steel ring 15 is connected between the bottom end of the central shell 1 and a well mouth or a mandrel, and the steel ring 15 is connected with the bottom end of the connecting hole in a sealing mode.
In order to further optimize the technical scheme, one end of the driving piston 3, which is in contact with the driving piston head 5, is provided with an open locking ring 32, one side of the driving piston head 5, which is in contact with the open locking ring 32, is provided with a step which is concave towards the inner side of the driving piston head 5, and the step of the driving piston head 5 is arranged at the top of the open locking ring 32. During assembly, the retaining ring 51 is provided at the bottom of the driving piston head 5, and the top of the retaining ring 51 is placed at the bottom of the split locking ring 32, ensuring that the step of the driving piston head 5 does not come off the split locking ring 32 during assembly.
In order to further optimize the technical scheme, the display rod 8 is arranged at the top of the first shoulder 11 in a penetrating mode, and the display rod 8 abuts against the top of the second shoulder 31 through the first shoulder 11; the junction of first circular bead top 11 and demonstration pole 8 is fixed with first spring holder 16, shows that pole 8 wears to locate the inside of first spring holder 16, and the bottom of showing pole 8 is equipped with second spring holder 81, and the outside cover of showing pole 8 is equipped with first spring 82, the both ends of first spring 82 respectively with first spring holder 16 and second spring holder 81 butt.
In order to further optimize the above technical solution, a pull rope 9 is connected to the top of the display rod 8, and a display device 10 is connected to the other end of the pull rope 9, wherein the display device 10 includes: a display panel 101, an indication circular plate 102, an indication lever 103, a fixed barrel 104, a connecting barrel 105, and a second spring 106; the connecting cylinder 105 is fixedly connected with the bottom of the fixed cylinder 104, two ends of the connecting cylinder 105 and two ends of the fixed cylinder 104 are both in an open shape and are fixed inside the display panel 101, the indicating rod 103 penetrates through the connecting cylinder 105 and the fixed cylinder 104, the top of the indicating rod 103 is fixedly connected with the indicating circular plate 102, the outer surface of the indicating rod 103 is provided with a third spring seat 107, the third spring seat 107 is arranged in an inner cavity of the fixed cylinder 104, the outside of the indicating rod 103 is sleeved with a second spring 106, one end of the second spring 106 abuts against the bottom of the third spring seat 107, and the other end abuts against the top end face of the connecting cylinder 105; the display panel 101 has a viewing window 108 formed on a surface thereof, and the indicator disk 102 is disposed at the viewing window 108. The fixed cylinder 104 is fixed inside the display panel 101 by a fixing plate 109, and the inner diameter of the connecting cylinder 105 is smaller than the inner diameter of the fixed cylinder 104, so that the second spring 106 can be in contact with the end surface of the connecting cylinder 105.
In order to further optimize the technical scheme, a plurality of flushing pipelines 17 are uniformly arranged at the top of the first shoulder 11, the top of each flushing pipeline 17 is connected with an oil way joint 18, the bottom of each flushing pipeline is connected with an oil way nozzle 19, and liquid sprayed out from the oil way nozzles 19 acts between the driving piston 3 and the locking block 4.
In order to further optimize the technical scheme, a plurality of oil passages 110 are uniformly formed in the top of the first shoulder 11, and the plurality of oil passages 110 pass through the first shoulder 11 and the outer shell 2 and are communicated between the unlocking piston 6 and the fourth shoulder 21 or between the driving piston 3 and the unlocking piston 6.
In order to further optimize the technical scheme, the bottom of the outer shell 2 is fixedly connected with an annular connecting plate 22, the bottom of the connecting plate 22 is provided with a flexible sealing element 23, the flexible sealing element 23 is fixed to the bottom of the connecting plate 22 through an annular pressing plate 24, an opening is formed in the middle of the flexible sealing element 23, the flexible sealing element is sleeved on the outer side of a wellhead or a mandrel 013 and is sealed with the outer wall of the wellhead or the mandrel 013. An annular pressure plate 24 secures the flexible seal 23 to the attachment plate 22 by bolts.
In order to further optimize the above technical solution, the locking block 4 comprises: locking body 41 and fixture block 42, fixture block 42 is connected with the bottom of locking body 41, and is used for chucking well head or the outer wall of dabber 013, and locking body contacts with third shoulder 12, drive piston 3 respectively, and first notch 41 and second notch 42 all set up on locking body 43.
In order to further optimize the technical scheme, sealing elements 011 are arranged on the contact surface between the driving piston 3 and the inner wall of the outer shell 2, the contact surface between the unlocking piston 6 and the outer shell 2 or the driving piston 3, the contact surface between the end surface of the fourth shoulder 21 and the driving piston 3, and the contact surface between the driving piston head 5 and the driving piston 3 or the inner wall of the outer shell 2, and sand scraping and dust removing rings 012 are arranged on the top of the contact surface between the driving piston 3 and the inner wall of the outer shell 2 and the bottom of the contact surface between the driving piston head 5 and the inner wall of the outer shell 2.
In order to further optimize the above technical solution, fig. 7-10 are four forms of the locking block 4, fig. 8 is the monolithic body of fig. 7, and fig. 10 is the monolithic body of fig. 9, respectively.
The working principle is as follows:
when the driving piston 3 moves downwards, the locking block 4 locks the well mouth or the mandrel 013, hydraulic oil is injected between the driving piston 3 and the unlocking piston 6 through the oil path 110, the driving piston 3 moves upwards, the locking block 4 is opened, and a first unlocking mode of the well mouth or the mandrel 013 is realized; when the locking block 4 is locked, hydraulic oil is injected between the unlocking piston 6 and the fourth shoulder 21 of the outer shell 2 through the oil path 110 to drive the piston 3 to move upwards, so that the locking block 4 is opened, and a second unlocking mode of a well mouth or a core shaft 013 is realized; when the locking block 4 is locked, the unlocking lifting rod 7 is lifted upwards to drive the driving piston 3 to move upwards, so that a third unlocking mode of a wellhead or a mandrel 013 is realized.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A marine subsea hydraulic connector, comprising:
the device comprises a central shell (1), wherein the central shell (1) is cylindrical, and a connecting hole is formed in the center of the central shell; an annular first shoulder (11) extending to the outside of the central shell (1) is arranged on the outer side of the top of the central shell (1), and the first shoulder (11) is integrally connected with the central shell (1);
the inner part of the outer shell (2) is hollow, the outer shell (2) is sleeved outside the lower part of the central shell (1), and the top of the outer shell (2) is fixedly connected with the bottom of the first shoulder (11);
the driving piston (3) is sleeved between the central shell (1) and the outer shell (2); a second shoulder (31) extending to the outside of the driving piston (3) is arranged on the outer side of the top of the driving piston (3), and the outer circumferential surface of the second shoulder (31) is in contact with and sealed with the inner side surface of the outer shell (2);
the locking blocks (4) are arranged in a plurality and are uniformly distributed around the outer circumferential surface of the outer shell (2) and are arranged between the central shell (1) and the driving piston (3); a third shoulder (12) is arranged on the outer side face of the bottom end of the central shell (1), a first notch (41) matched with the third shoulder (12) is formed in one side, in contact with the central shell (1), of the locking block (4), and the third shoulder (12) is arranged at the first notch (41); the other side of the locking block (4) is in contact with the surface of the driving piston (3); the top of one side, which is in contact with the driving piston (3), of the locking block (4) is provided with a second notch (42) which is adaptive to the shape of the second shoulder (31), and the second notch (42) is arranged above the second shoulder (31);
the driving piston head (5) is fixedly sleeved on the outer side of the bottom end of the driving piston (3), and the driving piston head (5) is in contact with and sealed with the inner side wall of the outer shell (2);
the unlocking piston (6), the middle part of the inner side of the outer shell (2) is provided with an annular fourth shoulder (21), the unlocking piston (6) is positioned above the fourth shoulder (21), is arranged between the outer shell (2) and the driving piston (3), and is sealed with the contact surfaces of the outer shell (2) and the driving piston (3);
the unlocking lifting rod (7) penetrates through the first shoulder (11) and is fixedly connected with the top of the second shoulder (31).
2. A marine underwater hydraulic connector as claimed in claim 1, wherein the inner wall of the bottom end of the connecting hole of the center housing (1) is provided with a first sealing surface (13) and a second sealing surface (14), a steel ring (15) is connected between the bottom end of the center housing (1) and a wellhead or a mandrel (013), and the steel ring (15) is connected with the bottom end of the connecting hole in a sealing manner.
3. A marine subsea hydraulic connector as claimed in claim 1 or 2, characterized in that the end of the driving piston (3) in contact with the driving piston head (5) is provided with a split locking ring (32), the side of the driving piston head (5) in contact with the split locking ring (32) is provided with a step recessed inside the driving piston head (5), and the step of the driving piston head (5) is placed on top of the split locking ring (32).
4. A marine subsea hydraulic connector as claimed in claim 3, characterized in that a display rod (8) is threaded through the top of said first shoulder (11), said display rod (8) abutting the top of said second shoulder (31) through said first shoulder (11); first circular bead top (11) with the junction of demonstration pole (8) is fixed with first spring holder (16), show pole (8) wear to locate the inside of first spring holder (16), the bottom of demonstration pole (8) is equipped with second spring holder (81), the outside cover of demonstration pole (8) is equipped with first spring (82), the both ends of first spring (82) respectively with first spring holder (16) and second spring holder (81) butt.
5. A marine underwater hydraulic connector as claimed in claim 4, wherein a pull rope (9) is connected to the top of the display lever (8), and a display device (10) is connected to the other end of the pull rope (9), the display device (10) comprising: a display panel (101), an indication circular plate (102), an indication rod (103), a fixed cylinder (104), a connecting cylinder (105) and a second spring (106); the connecting cylinder (105) is fixedly connected with the bottom of the fixed cylinder (104), two ends of the connecting cylinder (105) and the fixed cylinder (104) are both in an open shape and are fixed inside the display panel (101), the indicating rod (103) penetrates through the connecting cylinder (105) and the fixed cylinder (104), the top of the indicating rod (103) is fixedly connected with the indicating circular plate (102), a third spring seat (107) is arranged on the outer surface of the indicating rod (103), the third spring seat (107) is arranged in the inner cavity of the fixed cylinder (104), a second spring (106) is sleeved outside the indicating rod (103), one end of the second spring (106) abuts against the bottom of the third spring seat (107), and the other end of the second spring abuts against the top end face of the connecting cylinder (105); an observation window (108) is formed in the surface of the display panel (101), and the indicating circular plate (102) is arranged at the observation window (108).
6. A marine underwater hydraulic connector as claimed in claim 5, wherein a plurality of flushing pipes (17) are uniformly arranged on the top of the first shoulder (11), the top of each flushing pipe (17) is connected with an oil line joint (18), the bottom of each flushing pipe is connected with an oil line nozzle (19), and liquid sprayed from the oil line nozzles (19) acts between the driving piston (3) and the locking block (4).
7. A marine underwater hydraulic connector as claimed in claim 6, wherein a plurality of oil passages (110) are uniformly opened at the top of the first shoulder (11), and the plurality of oil passages (110) pass through the first shoulder (11) and the outer housing (2) to communicate between the unlocking piston (6) and the fourth shoulder (21) or between the driving piston (3) and the unlocking piston (6).
8. A marine underwater hydraulic connector as claimed in claim 7, wherein an annular connecting plate (22) is fixedly connected to the bottom of the outer housing (2), a flexible sealing member (23) is arranged at the bottom of the connecting plate (22), the flexible sealing member (23) is fixed to the bottom of the connecting plate (22) through an annular pressing plate (24), an opening is formed in the middle of the flexible sealing member (23), the opening is sleeved on the outer side of a wellhead or a mandrel (013), and the opening is sealed with the outer wall of the wellhead or the mandrel (013).
9. A marine underwater hydraulic connector as claimed in claim 8, characterized in that said locking block (4) comprises: the locking device comprises a locking body (43) and a clamping block (44), wherein the clamping block (44) is connected with the bottom of the locking body (43) and used for clamping the outer wall of a wellhead or a mandrel (013), the locking body is respectively contacted with the third shoulder (12) and the driving piston (3), and the first notch (41) and the second notch (42) are formed in the locking body (43).
10. A marine underwater hydraulic connector as claimed in any one of claims 1, 2, and 4 to 9, wherein the contact surface between the driving piston (3) and the inner wall of the outer housing (2), the contact surface between the unlocking piston (6) and the outer housing (2) or the driving piston (3), the contact surface between the end surface of the fourth shoulder (21) and the driving piston (3), and the contact surface between the driving piston head (5) and the driving piston (3) or the inner wall of the outer housing (2) are all provided with sealing members (011), and the top of the contact surface between the driving piston (3) and the inner wall of the outer housing (2), and the bottom of the contact surface between the driving piston head (5) and the inner wall of the outer housing (2) are all provided with sand scraping and dust removing rings (012).
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| CN202110219647.3A CN113063043B (en) | 2021-02-26 | 2021-02-26 | Ocean underwater hydraulic connector |
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| CN202110219647.3A CN113063043B (en) | 2021-02-26 | 2021-02-26 | Ocean underwater hydraulic connector |
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| CN113063043B CN113063043B (en) | 2023-09-08 |
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| CN113063043B (en) | 2023-09-08 |
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