A blowout emergency device

Abstract

This invention belongs to the field of oil and gas extraction technology, specifically relating to a blowout emergency response device. The blowout emergency response device includes: a slip assembly for fixing to a casing; a sealing assembly disposed on the upper part of the slip assembly, the sealing assembly being used to seal against the outer wall of the casing; and an upper flange coaxially and sealingly disposed on the upper part of the sealing assembly, the upper flange being used to seal and connect a blowout preventer, thereby communicating the inner cavity of the casing with the blowout preventer.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas extraction technology, specifically, it relates to a blowout emergency response device. Background Technology

[0002] An uncontrolled blowout can cause crude oil or natural gas to gush out of the wellhead. If it comes into contact with a source of ignition, it will immediately ignite and explode, causing the blowout to ignite and resulting in serious economic losses, casualties, and social impact.

[0003] With the development of oil and gas exploration technology, some out-of-control wells are characterized by "high pressure, high production, and high sulfur content." To prevent more severe casualties and equipment damage caused by factors such as hydrogen sulfide and flash explosions, full-process on-the-spot operation technology is usually used for handling. Traditional wellhead resetting methods are no longer sufficient to accomplish this task. Therefore, based on a thorough study and reference to existing wellhead emergency rescue operation conditions and existing wellhead reconstruction devices, there is an urgent need to design a blowout rescue device that is easy to operate, remotely hydraulically controlled, safe and adjustable, and equipped with hydraulically controlled self-locking function. Summary of the Invention

[0004] In view of the technical problems mentioned above, the present invention aims to provide a blowout emergency response device that can be used for blowout emergency response.

[0005] According to the present invention, a blowout emergency response device is provided, comprising:

[0006] A slip assembly for securing the sleeve;

[0007] A sealing component is disposed on the upper part of the slip assembly, the sealing component being used to seal the outer wall of the sleeve;

[0008] A coaxial seal is provided on the upper flange of the sealing assembly. The upper flange is used to seal the connection of the blowout preventer, thereby connecting the inner cavity of the sleeve with the blowout preventer.

[0009] In one specific embodiment, the Kava component includes:

[0010] A slip connector, wherein a slip hole is coaxially provided within the slip connector;

[0011] Multiple locking elements are arranged circumferentially and spaced within the locking hole;

[0012] An axially retractable telescopic assembly is provided on the slip connector. The telescopic assembly connects each of the slip pieces. The telescopic assembly can drive each of the slip pieces to move axially relative to the slip hole, thereby causing the slip pieces to radially retract under the action of the slip hole to anchor the sleeve.

[0013] In one specific embodiment, the telescopic component includes:

[0014] A piston hole is provided axially within the slip connector, and a piston rod is movably disposed within the piston hole;

[0015] A horizontal frame is provided at the end of the piston rod, and each of the slip pieces is hinged to the horizontal frame via a connector;

[0016] The piston rod is moved by hydraulic pressure, which in turn moves the slip piece via the horizontal frame and the connecting piece.

[0017] In one specific embodiment, the top of the piston hole is an upper hydraulic chamber, and the bottom of the piston hole is a lower hydraulic chamber. The upper hydraulic chamber and the lower hydraulic chamber are located on the upper and lower sides of the piston rod, respectively. A first flow channel for communicating the upper hydraulic chamber with the outside is provided in the slip connecting seat, and a third flow channel for communicating the lower hydraulic chamber with the outside is provided in the slip connecting seat.

[0018] In one specific embodiment, a one-way control valve is provided in the slip connector. The first flow channel is connected to the upper hydraulic chamber through the one-way control valve. A second flow channel is also provided in the slip connector and is connected to the one-way control valve. When fluid is pumped into the first flow channel, the one-way control valve switches to allow fluid to enter the upper hydraulic chamber in one direction. When fluid is pumped into the second flow channel, the one-way control valve switches to allow fluid to flow out of the upper hydraulic chamber.

[0019] In one specific embodiment, a valve chamber and a control flow channel are provided in the slip connector, and the control flow channel is connected to the upper hydraulic chamber through the valve chamber;

[0020] The one-way control valve is disposed in the valve cavity, and the control block of the one-way control valve is located in the control flow channel;

[0021] The first flow channel is connected to the control flow channel, and the connection point is located on the side of the control block near the one-way control valve;

[0022] The second flow channel is connected to the control flow channel, and the connection point is located on the side of the control block away from the one-way control valve.

[0023] In one specific embodiment, the sealing assembly includes:

[0024] A sealing housing is coaxially fixed to the upper part of the slip assembly, and a pressure port is provided on the side wall of the sealing housing;

[0025] A cover plate coaxially fixed to the upper part of the sealing housing;

[0026] An axially movable sealing piston is disposed within the sealing housing, the sealing piston being located above the pressure port;

[0027] A sealing element is coaxially disposed within the sealing housing, the sealing element being located between the sealing piston and the cover plate. When the sealing element is axially compressed by the sealing piston, it can radially contract, thereby sealing the inner wall of the sealing element with the outer wall of the sleeve.

[0028] In one specific embodiment, the upper end of the sealing piston is constructed as a tapered surface, and the seal is constructed as a tapered shape that can be adapted to the tapered surface.

[0029] In one specific embodiment, the seal includes a rubber core and support ribs uniformly disposed circumferentially on the rubber core, the support ribs being adapted to the conical surface.

[0030] In one specific embodiment, the cover plate is connected to the sealing housing by a plurality of claw assemblies evenly arranged circumferentially. The claw assembly includes a claw rod fixedly arranged radially on the sealing housing, a claw block arranged radially inside the claw rod, and a slot for inserting the claw block is provided on the outer wall of the cover plate.

[0031] In one specific embodiment, the upper flange seal is fixed to the upper part of the cover plate, and a grease injection valve for injecting grease into the sealing assembly is provided on the upper flange.

[0032] In one specific embodiment, a guide cover is fixedly disposed at the lower part of the chuck assembly.

[0033] Compared with the prior art, the advantages of this application are as follows.

[0034] The blowout emergency device provided by this invention mainly includes a slip assembly, a sealing assembly, and an upper flange. During blowout emergency response, the slip assembly is anchored to the casing, the sealing element of the sealing assembly seals the outer wall of the casing, and the upper flange is connected to the blowout preventer. After the blowout fluid is ejected upward along the casing, it flows into the cavity above the sealing element of the sealing assembly, and then enters the blowout preventer along the upper flange, thereby completing the blowout emergency response.

[0035] The slip assembly is anchored to the sleeve via slip pieces. Depending on the size of the sleeve, different amounts of hydraulic oil are pumped into the upper hydraulic chamber of the piston hole, causing the piston rod to move downward. At the same time, the horizontal frame and connecting parts move downward, causing the slip to move downward and converge towards the center to clamp the outer wall of the sleeve, thus achieving clamping of different sleeve sizes.

[0036] The one-way control valve installed inside the slip connector ensures that the slip remains locked even after the first flow channel is depressurized, thus solving the problem of hydraulic circuit failure caused by prolonged operation.

[0037] After the sealing component seals the casing, sealing grease is applied to the sealing component through the grease injection valve. This can improve the pressure resistance of the sealing component, extend the sealing time, and ensure the safety of wellhead emergency repairs. Attached Figure Description

[0038] The invention will now be described with reference to the accompanying drawings.

[0039] Figure 1 A schematic diagram of one embodiment of the blowout emergency response device according to the present invention is shown;

[0040] Figure 2 A schematic diagram of an embodiment of the slip connection seat of the blowout rescue device according to the present invention is shown;

[0041] Figure 3 A schematic diagram showing an embodiment of a seal of a blowout rescue device according to the present invention is shown;

[0042] Figure 4 A schematic diagram showing an embodiment of the cover plate of the blowout rescue device according to the present invention is shown;

[0043] Figure 5 Showing Figure 1 A cross-sectional view along direction A in the diagram.

[0044] The reference numerals in the figure are as follows:

[0045] 1. Upper flange; 2. Grease injection valve; 3. Cover plate; 31. Slot; 4. Seal; 401. Support rib; 402. Rubber core; 5. Dust seal; 6. Sealing piston; 61. Conical surface; 62. Piston body; 63. Main body; 7. Column; 8. Pressurization port; 9. Sealing housing; 10. Slip connecting seat; 101. Upper hydraulic chamber; 102. First flow channel; 103. Second flow channel; 104. Third flow channel; 105. Lower hydraulic chamber; 106. Slip hole ; 107. Chamber; 108. Piston hole; 109. Valve chamber; 110. Control flow channel; 11. Horizontal frame; 12. Connector; 13. Piston rod; 14. One-way control valve; 141. Control block; 15. Slip assembly; 16. Guide cover; 17. Casing; 18. Claw assembly; 181. Claw rod; 182. Claw block; 19. Piston gland; 20. Slip assembly; 30. Telescopic assembly; 40. Sealing assembly; 100. Blowout rescue device.

[0046] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0047] The invention will now be described with reference to the accompanying drawings.

[0048] It should be noted that the directional terms or qualifiers used in this application, such as "up," "down," "left," and "right," are all specific to the referenced material. Figure 1 In other words, they are not used to define the absolute position of the components involved, but can vary depending on the specific circumstances.

[0049] During a blowout, fluid is ejected from the bottom of the well through casing 17. The blowout rescue process can be viewed as the process of sealing off or properly diverting the fluid from the top outlet of casing 17.

[0050] Figure 1 The structure of a blowout emergency response device 100 according to the present invention is shown. (As follows) Figure 1 As shown, the blowout emergency response device 100 mainly includes slip assembly 20, sealing assembly 40 and upper flange 1.

[0051] The slip assembly 20 is used to fix the casing 17. The sealing assembly 40 is coaxially fixed on the upper part of the slip assembly 20, and the sealing assembly 40 is used to seal the outer wall of the casing 17. The upper flange 1 is coaxially sealed on the upper part of the sealing assembly 40, and the upper part of the upper flange 1 is used to seal the connection of the blowout preventer (not shown in the figure). It is easy to understand that the blowout preventer is a device for blowout prevention that is well known to those skilled in the art. For example, the blowout preventer can be set as a four-way valve to facilitate the drainage of fluid in the well, or the blowout preventer can be set as a gate blowout preventer for closing the wellhead passage (i.e., the casing 17).

[0052] In this embodiment, during the blowout emergency response, the blowout emergency response device 100 is coaxially sleeved on the top of the blowout casing 17, allowing the casing 17 to pass through the slip assembly 20 and the sealing assembly 40 sequentially from bottom to top. The slip assembly 20 is then fixed to the casing 17, thus securing the entire blowout emergency response device 100 to the casing 17. The sealing assembly 40 then seals against the outer wall of the casing 17, ensuring that fluid ejected from the top outlet of the casing 17 can only flow upwards along the upper flange 1 into the blowout preventer, thereby completing the blowout emergency response.

[0053] In this embodiment, as Figure 1 As shown, the slip assembly 20 mainly includes a slip connector 10, a slip piece 15, and a telescopic assembly 30.

[0054] Specifically, the upper end of the slip connector 10 is fixedly connected to the sealing assembly 40 by a plurality of bolts evenly distributed along the circumference. Inside the slip connector 10, a chamber 107 and a slip hole 106 are arranged sequentially from top to bottom along the central axis. The inner diameter of the chamber 107 is larger than the inner diameter of the slip hole 106. The chamber 107 is used to accommodate part of the structure of the telescopic assembly 30, and the slip hole 106 is used to accommodate and adapt the slip piece 15. The sleeve 17 passes sequentially from top to top through the slip hole 106 and the chamber 107, and then through the sealing assembly 40.

[0055] The slip hole 106 is constructed with an upper inner diameter larger than a lower inner diameter, such as a cone shape. Multiple slip pieces 15 are circumferentially spaced within the slip hole 106. In this embodiment, four slip pieces 15 are provided, and the outer wall surface of each slip piece 15 is constructed to fit the inner wall surface of the slip hole 106, such as a wedge shape. With this configuration, when the slip pieces 15 move downwards relative to the slip hole 106 along the central axis, each slip piece 15 converges towards the center due to the gradually decreasing inner diameter of the slip hole 106, thereby clamping the sleeve 17.

[0056] The telescopic assembly 30 is mounted on the slip connector 10 and is configured to extend and retract along the central axis, meaning the extension and retraction direction of the telescopic assembly 30 is parallel to the central axis. The telescopic assembly 30 connects to each slip member 15. The telescopic assembly 30 can drive each slip member 15 to move axially relative to the slip hole 106. When the telescopic assembly 30 drives the slip member 15 downward relative to the slip hole 106, the slip member 15 radially retracts under the action of the slip hole 106 to clamp the sleeve 17. When the telescopic assembly 30 drives the slip member 15 upward, the slip member 15 no longer clamps the sleeve 17.

[0057] In one specific embodiment, anchoring teeth are provided on the surface of the slip 15 for disengagement from the casing 17. These anchoring teeth allow the slip 15 to be anchored to the outer wall of the casing 17, thereby making the connection between the slip assembly 20 and the casing 17 more secure. Furthermore, the anchoring teeth on the slip 15 have a self-locking angle; the greater the upward force experienced by the blowout rescue device 100 during a blowout, the greater the clamping force of the slip 15.

[0058] In this embodiment, as Figure 1 and Figure 2As shown, the telescopic assembly 30 includes piston holes 108 axially disposed within the slip connecting seat 10, with multiple piston holes 108 evenly distributed circumferentially within the slip connecting seat 10. A piston rod 13 is movably disposed within each piston hole 108, and the piston rod 13 can move upward or downward along the piston hole 108 under hydraulic pressure. A horizontal frame 11 is disposed within the chamber 107 of the slip connecting seat 10, and the horizontal frame 11 is perpendicular to the central axis. The upper end of each piston rod 13 is fixedly connected to the horizontal frame 11. Each slip piece 15 is hinged to the horizontal frame 11 via a connecting member 12, i.e., one end of the connecting member 12 is hinged to the slip piece 15, and the other end is hinged to the horizontal frame 11.

[0059] In this configuration, hydraulically driving the piston rod 13 to move along the piston hole 108 causes the horizontal frame 11 to move axially relative to the slip hole 106. This, in turn, causes the slip 15 to move axially relative to the slip hole 106 via the horizontal frame 11 and the connecting piece 12. By providing multiple piston holes 108 and piston rods 13, the horizontal frame 11 can be subjected to uniform force and move smoothly.

[0060] In this embodiment, as Figure 1 and Figure 2 As shown, a piston cap 19 is sealed at the top of each piston hole 108. Specifically, the piston cap 19 is sealed and fixed to the top of the piston hole 108 by a threaded connection. The piston rod 13 passes through the piston cap 19. The top of each piston hole 108 is an upper hydraulic chamber 101, and the bottom of each piston hole 108 is a lower hydraulic chamber 105. The upper hydraulic chamber 101 and the lower hydraulic chamber 105 are located on the upper and lower sides of the piston of the piston rod 13, respectively. That is, the space between the piston of the piston rod 13 and the piston cap 19 is the upper hydraulic chamber 101, and the space between the piston of the piston rod 13 and the bottom of the piston hole 108 is the lower hydraulic chamber 105. A first flow channel 102 for communicating the upper hydraulic chamber 101 with the outside is provided in the slip connector 10, and a third flow channel 104 for communicating the lower hydraulic chamber 105 with the outside is provided in the slip connector 10. In this configuration, injecting hydraulic oil into the upward hydraulic chamber 101 through the first flow channel 102 can push the piston rod 13 to move downward, and injecting hydraulic oil into the downward hydraulic chamber 105 through the third flow channel 104 can push the piston rod 13 to move upward.

[0061] In this embodiment, as Figure 1 and Figure 2As shown, a one-way control valve 14 is provided within the slip connector 10. The one-way control valve 14 includes two ports and a control block 141. By moving the control block 141 relative to the one-way control valve 14, the one-way control valve 14 can be switched to different states. In the first state, the one-way control valve 14 only allows fluid to flow unidirectionally towards the upper hydraulic chamber 101; that is, fluid within the upper hydraulic chamber 101 cannot flow outward through the one-way control valve 14. In the second state, the one-way control valve 14 allows fluid within the upper hydraulic chamber 101 to flow outward through the one-way control valve 14. The specific structure of the one-way control valve 14 is well known to those skilled in the art and will not be described in detail here.

[0062] Specifically, a valve chamber 109 and a control flow channel 110 are provided within the slip connector 10. For example... Figure 1 As shown, the left side of valve chamber 109 is connected to the upper hydraulic chamber 101, and the right side of valve chamber 109 is connected to the control flow channel 110. The one-way control valve 14 is fixedly installed in valve chamber 109, and the control block 141 of the one-way control valve 14 is movablely installed in control flow channel 110.

[0063] The first flow channel 102 is connected to the control flow channel 110, and the connection point between the first flow channel 102 and the control flow channel 110 is located on the side of the control block 141 near the one-way control valve 14. One port of the one-way control valve 14 is connected to the upper hydraulic chamber 101, and the other port is connected to the first flow channel 102 through the control flow channel 110.

[0064] In this configuration, when hydraulic oil is injected into the control channel 110 through the first flow channel 102, the hydraulic oil pushes the control block 141 to the right. At this time, the one-way control valve 14 is in the first state, and the hydraulic oil can enter the one-way control valve 14 to the left along the control channel 110, and then enter the upper hydraulic chamber 101 to the left through the one-way control valve 14, thereby pushing the piston rod 13 to move downward, and thus causing the slip 15 to clamp the sleeve 17. The hydraulic oil in the upper hydraulic chamber 101 cannot flow out through the one-way control valve 14. Therefore, after the slip 15 clamps the sleeve 17, even if the first flow channel 102 no longer continuously pumps pressure, the slip 15 can continue to clamp the sleeve 17.

[0065] The second flow channel 103 is connected to the control flow channel 110, and the connection point between the second flow channel 103 and the control flow channel 110 is located on the side of the control block 141 away from the one-way control valve 14. The control block 141 and the control flow channel 110 can be configured to resemble a piston engagement. When it is necessary to de-clamp the sleeve 17 by removing the slip 15, hydraulic oil is injected into the control flow channel 110 through the second flow channel 103. The hydraulic oil can push the control block 141 to the left. At this time, the one-way control valve 14 switches to the second state, and the hydraulic oil in the upper hydraulic chamber 101 can flow out through the one-way control valve 14. Hydraulic oil is injected into the lower hydraulic chamber 105 through the third flow channel 104, which can push the piston rod 13 upward, thereby allowing the piston rod 13 to move upward and de-clamp the sleeve 17 by removing the slip 15.

[0066] In this embodiment, as Figure 1 As shown, the sealing assembly 40 mainly includes a sealing housing 9, a cover plate 3, a sealing piston 6, and a sealing element 4.

[0067] The sealing housing 9 is constructed as a cylindrical shape with a cavity. The lower end of the sealing housing 9 is coaxially fixed to the upper end of the slip connector 10 by a plurality of screws evenly distributed along the circumference. In this embodiment, twelve screws are provided. A pressure port 8 is provided on the side wall of the sealing housing 9. Pressure can be pumped into the inner cavity of the sealing housing 9 through the pressure port 8.

[0068] The cover plate 3 is coaxially and sealed to the top of the sealing housing 9, and a sealing ring is provided on the contact surface between the cover plate 3 and the sealing housing 9 to enhance the seal between the two.

[0069] A cylindrical column 7 is coaxially sealed inside the sealing housing 9, with its lower end sealed to the sealing housing 9. A sealing piston 6 is coaxially sleeved on the cylindrical column 7, with its outer side wall sealing to the inner side wall of the sealing housing 9, and its inner side wall sealing to the outer side wall of the cylindrical column 7. A pressure port 8 is located below the sealing piston 6. In this configuration, the lower end face of the sealing piston 6, the outer side wall of the cylindrical column 7, the inner side wall of the sealing housing 9, and the inner wall of the lower end of the sealing housing 9 form a closed space. The pressure port 8 communicates with this closed space, allowing pressure to be pumped into it, thereby pushing the sealing piston 6 upward. The inner cavity of the cylindrical column 7 is used for the sleeve 17 to pass through.

[0070] In this embodiment, a one-way valve is provided inside the pressurization port 8, which only allows fluid to flow unidirectionally from the outside to the inside of the sealing housing 9.

[0071] In one specific embodiment, the sealing piston 6 includes a main body 63 and a piston body 62 coaxially fixed to the outer wall of the main body 63. A step is provided on the inner wall of the sealing housing 9. The outer wall of the main body 63 of the sealing piston 6 contacts the inner wall of the step in the sealing housing 9, and the outer wall of the piston body 62 of the sealing piston 6 is in sealing contact with the inner wall above the step in the sealing housing 9. The pressure port 8 is located at the upper end of the step in the sealing housing 9, and under the action of the step in the sealing housing 9, the flow direction of the hydraulic oil is changed to vertically upward, directly impacting the piston body 62 of the sealing piston 6. In this way, the flow direction of the hydraulic oil can be improved, which is beneficial for pushing the sealing piston 6 upward. Furthermore, a sealing ring can be provided between the main body 63 and the inner wall of the step in the sealing housing 9, which on the one hand adds an extra layer of sealing, enhances the sealing effect, and on the other hand reduces the amount of hydraulic oil injected.

[0072] In a preferred embodiment, a dust seal 5 is also provided between the sealing housing 9 and the sealing piston 6. By providing the dust seal 5, it is possible to prevent hydraulic oil injected through the pressurization port 8 from leaking from between the sealing piston 6 and the sealing housing 9 to the location of the seal 4.

[0073] The seal 4 is coaxially disposed within the sealing housing 9, located between the sealing piston 6 and the cover plate 3. When the sealing piston 6 moves upward relative to the cover plate 3, the seal 4 is subjected to axial compression by the sealing piston 6 and the cover plate 3. Under axial compression, the seal 4 can contract radially, thereby sealing the inner wall of the seal 4 with the outer wall of the sleeve 17.

[0074] In this embodiment, the upper end inner wall of the sealing piston 6 is constructed as a tapered surface 61, with the upper inner diameter of the tapered surface 61 being larger than the lower inner diameter. The sealing element 4 is constructed as a tapered shape that can be adapted to the tapered surface 61. With this configuration, while the sealing piston 6 axially compresses the sealing element 4, it can also apply a certain radial pressure to the sealing element 4, thereby further increasing the radial contraction deformation of the sealing element 4 and improving the sealing effect between the sealing element 4 and the sleeve 17.

[0075] In this embodiment, as Figure 3As shown, the sealing element 4 includes a cylindrical rubber core 402, within which a plurality of support ribs 401 are evenly distributed along the circumference. In this embodiment, twelve support ribs 401 are provided. The outer surfaces of the upper and lower parts of the overall structure formed by the plurality of support ribs 401 are both constructed as conical surfaces. The outer diameter of the upper conical surface gradually increases from top to bottom, while the outer diameter of the lower conical surface gradually decreases from top to bottom. With this configuration, when the sealing piston 6 and the cover plate 3 axially compress the sealing element 4, the cover plate 3 will generate a radially inward component force on the support ribs 401, thereby increasing the overall radial contraction deformation of the sealing element 4. The conical surface 61 of the sealing piston 6 is adapted to the lower conical surface of the support rib 401 (or the lower outer surface of the rubber core 402 is constructed as a conical surface adapted to the conical surface 61), which will also generate a radially inward component force on the sealing element 4, increasing the overall radial contraction deformation of the sealing element 4 and improving the sealing effect between the sealing element 4 and the sleeve 17.

[0076] In this embodiment, the cover plate 3 is connected to the sealing housing 9 by a plurality of claw assemblies 18 evenly arranged along the circumferential direction, such as... Figure 5 As shown in the figure. In this embodiment, sixteen claw assemblies 18 are evenly arranged along the circumference.

[0077] like Figure 5 As shown, the claw assembly 18 includes a claw rod 181 that is radially fixed to the sealing housing 9. In this embodiment, one end of the claw rod 181 is fixed to the upper end of the sealing housing 9 by a screw, and the other end extends radially inward along the sealing housing 9. A claw block 182 is provided on the radially inner side of the claw rod 181, and at least a portion of the claw block 182 extends radially inward beyond the inner wall of the sealing housing 9.

[0078] like Figure 4 and Figure 5 As shown, the outer diameter of the lower end of the cover plate 3 is compatible with the inner diameter of the upper end of the sealing housing 9, meaning that the lower end of the cover plate 3 can be inserted into the upper end of the sealing housing 9. A slot 31 for inserting the claw block 182 is provided on the outer wall of the lower end of the cover plate 3.

[0079] Compared to traditional screw connections, the claw assembly 18 requires lower machining precision, making it easier to perform frequent disassembly and maintenance.

[0080] In a preferred embodiment, the upper flange 1 is coaxially sealed and fixed to the upper part of the cover plate 3. A grease injection valve 2 for injecting grease into the seal 4 is provided on the upper flange 1. At least one grease injection valve 2 is obliquely disposed on the upper flange 1, and the grease injection valve 2 extends downward through a channel into the interior of the sealing housing 9, specifically extending downward above the seal 4. After blowout control, hydraulic oil is injected into the grease injection valve 2, and the screw of the grease injection valve 2 pushes the sealing grease downward, covering the cavity between the upper surface of the seal 4 and the outer wall of the casing 17 with the sealing grease, which can increase the pressure-bearing capacity of the seal 4 and prolong the sealing time.

[0081] In this embodiment, a guide cover 16 is fixedly disposed at the lower part of the slip assembly 20. Figure 1 As shown, the guide cover 16 is coaxially fixed to the lower end of the slip connector 10 of the slip assembly 20 by a plurality of screws evenly distributed along the circumference. The inner diameter of the guide cover 16 is tapered, gradually decreasing from bottom to top, which facilitates its fitting onto the sleeve 17.

[0082] After a blowout and subsequent fire, the blowout rescue device 100 is lowered from above the casing 17 using equipment such as a screw pile driver at the well site. Guided by the guide cover 16, the casing 17 passes sequentially through the slip hole 106 and chamber 107 of the slip connector 10, the bottom wall of the sealing shell 9, the cylinder 7, the seal 4, and the cover plate 3, until the top of the casing 17 abuts against the upper flange 1, completing the limiting. The remote-controlled hydraulic system pumps hydraulic oil into the first flow channel 102. After the hydraulic oil enters the upper hydraulic chamber 101, it pushes the piston rod 13 downward, causing the horizontal frame 11 and the connecting piece 12 to push the slip piece 15 downward and retract towards the center, so that the slip piece 15 clamps the outer wall of the casing 17, providing a pre-tightening force for the slip piece 15 to clamp onto the casing 17, thereby locking the blowout rescue device 100 onto the outer wall of the casing 17 and overcoming the upward force during the blowout. Simultaneously, the remotely controlled hydraulic control system injects hydraulic oil into the sealing housing 9 through the pressurization port 8, pushing the sealing piston 6 upward. This causes the sealing element 4 to retract inward and wrap around the outer wall of the casing 17, thereby sealing the downward leakage of gas and liquid channels inside the blowout emergency device 100. A four-way or gate blowout preventer is connected to the upper end of the upper flange 1 to facilitate the drainage of fluid in the well or the closure of the wellhead passage, thus controlling the blowout. After the blowout is controlled, hydraulic oil is injected into the grease injection valve 2, causing the screw to push the sealing grease downward. The sealing grease covers the cavity between the upper surface of the rubber core 402 of the sealing element 4 and the outer wall of the casing 17, increasing the pressure-bearing capacity of the rubber core 402 of the sealing element 4 and extending the sealing time.

[0083] After the blowout, close the hydraulic circuit of the pressurization port 8, open the upper flange 1, remove the screws between the claw rod 181 and the sealing housing 9, and the screws between the claw rod 181 and the claw block 182, remove the cover plate 3, and take out the seal 4. Control the lower hydraulic control system to pump hydraulic oil into the second flow channel 103, switch the state of the one-way control valve 14, and then pump hydraulic oil into the third flow channel 104 to push the piston rod 13 upward, causing the hydraulic oil in the upper hydraulic chamber 101 to be discharged from the first flow channel 102. The horizontal frame 11 and the connecting piece 12 drive the slip piece 15 to be lifted and unlocked. Use equipment such as a screw pile driver to remove the remaining blowout rescue device 100 from the casing 17, thus completing the disassembly of the device.

[0084] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0085] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0086] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A blowout emergency response device, characterized in that, include: The slip assembly (20) is used to secure the sleeve (17); A sealing assembly (40) is disposed on the upper part of the slip assembly, the sealing assembly (40) being used to seal against the outer wall of the sleeve (17); and A coaxial seal is provided on the upper flange (1) on the upper part of the sealing assembly (40). The upper flange (1) is used to seal the connection of the blowout preventer, thereby connecting the inner cavity of the sleeve (17) with the blowout preventer.

2. The blowout emergency response device according to claim 1, characterized in that, The KaVo component includes: A slip connector (10) has a slip hole (106) coaxially arranged inside the slip connector (10); Multiple locking elements (15) are arranged circumferentially and spaced apart within the locking hole (106); A telescopic assembly (30) is provided on the slip connector (10) and extends and retracts axially. The telescopic assembly (30) connects each of the slip pieces (15). The telescopic assembly (30) can drive each of the slip pieces (15) to move axially relative to the slip hole (106), so that the slip piece (15) retracts radially under the action of the slip hole (106) to anchor the sleeve (17).

3. The blowout emergency response device according to claim 2, characterized in that, The telescopic assembly (30) includes: A piston hole (108) is provided axially within the slip connector (10), and a piston rod (13) is movably provided within the piston hole (108); A horizontal frame (11) is provided at the end of the piston rod (13), and each of the locking pieces (15) is hinged to the horizontal frame (11) via a connector (12); The piston rod (13) is moved by hydraulic pressure, which in turn moves the locking piece (15) through the horizontal frame (11) and the connecting piece (12).

4. The blowout emergency response device according to claim 3, characterized in that, The top of the piston hole (108) is the upper hydraulic chamber (101), and the lower part of the piston hole (108) is the lower hydraulic chamber (105). The upper hydraulic chamber (101) and the lower hydraulic chamber (105) are located on the upper and lower sides of the piston rod (13), respectively. A first flow channel (102) for communicating the upper hydraulic chamber (101) with the outside is provided in the slip connecting seat (10), and a third flow channel (104) for communicating the lower hydraulic chamber (105) with the outside is provided in the slip connecting seat (10).

5. The blowout emergency response device according to claim 4, characterized in that, A one-way control valve (14) is provided in the slip connector (10). The first flow channel (102) is connected to the upper hydraulic chamber (101) through the one-way control valve (14). A second flow channel (103) is also provided in the slip connector (10). The second flow channel (103) is connected to the one-way control valve (14). When fluid is pumped into the first flow channel (102), the one-way control valve (14) switches to allow fluid to enter the upper hydraulic chamber (101) in one direction. When fluid is pumped into the second flow channel (103), the one-way control valve (14) switches to allow fluid to flow out of the upper hydraulic chamber (101).

6. The blowout emergency response device according to claim 5, characterized in that, A valve chamber (109) and a control flow channel (110) are provided in the slip connector (10), and the control flow channel (110) is connected to the upper hydraulic chamber (101) through the valve chamber (109); The one-way control valve (14) is disposed in the valve chamber (109), and the control block (141) of the one-way control valve (14) is located in the control flow channel (110); The first flow channel (102) is connected to the control flow channel (110), and the connection point is located on the side of the control block (141) near the one-way control valve (14); The second flow channel (103) is connected to the control flow channel (110), and the connection point is located on the side of the control block (141) away from the one-way control valve (14).

7. The blowout emergency response device according to any one of claims 1 to 6, characterized in that, The sealing assembly (40) includes: A sealing housing (9) is coaxially fixed to the upper part of the slip assembly (20), and a pressure port (8) is provided on the side wall of the sealing housing (9); A cover plate (3) is coaxially fixed to the upper part of the sealing housing (9); A sealing piston (6) is provided in the sealing housing (9) for axial movement and is located above the pressure port (8); A sealing element (4) is coaxially disposed within the sealing housing (9). The sealing element (4) is located between the sealing piston (6) and the cover plate (3). When the sealing element (4) is axially compressed by the sealing piston (6), it can radially contract, thereby sealing the inner wall of the sealing element (4) with the outer wall of the sleeve (17).

8. The blowout emergency response device according to claim 7, characterized in that, The upper end of the sealing piston (6) is constructed as a conical surface (61), and the sealing element (4) is constructed as a cone that can be adapted to the conical surface (61).

9. The blowout emergency response device according to claim 8, characterized in that, The sealing element (4) includes a rubber core (402) and a support rib (401) uniformly arranged circumferentially on the rubber core (402), the support rib (401) being adapted to the conical surface (61).

10. The blowout emergency response device according to claim 7, characterized in that, The cover plate (3) is connected to the sealing housing (9) by a plurality of claw assemblies (18) evenly arranged in the circumferential direction. The claw assembly (18) includes a claw rod (181) fixedly arranged in the radial direction on the sealing housing (9). A claw block (182) is provided on the radial inner side of the claw rod (181). A slot (31) for inserting the claw block (182) is provided on the outer wall of the cover plate (3).

11. The blowout emergency response device according to claim 7, characterized in that, The upper flange (1) is sealed and fixed on the upper part of the cover plate (3), and a grease injection valve (2) for injecting grease into the seal (4) is provided on the upper flange (1).

12. The blowout emergency response device according to any one of claims 1 to 6, characterized in that, A guide cover (16) is fixedly provided at the lower part of the chuck assembly (20).

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