Bidirectional locking and sealing automatic deviation-adjusting high-pressure blowout preventer

Abstract

The invention provides a bidirectional locking sealing automatic deviation adjusting high-pressure blowout preventer which comprises a sealing packing assembly, a valve body, a first sealing component, a hoop component, a second sealing component and a deviation adjusting assembly, and a polished rod penetrates through the sealing packing assembly, the first sealing component, the valve body, the second sealing component and the hoop component. In the process that the polished rod moves up and down in the bidirectional locking sealing automatic deviation-adjusting high-pressure blowout preventer, the first sealing component can rotate around the hoop component, so that the sealing packing assembly can be driven to rotate, the sealing packing assembly can rotate around the polished rod, the second sealing component can rotate around the hoop component, and the sealing packing assembly can be driven to rotate around the hoop component. The sealing packing assembly and the polished rod are in contact at all angles, the polished rod is prevented from eccentrically wearing partial position of packing in the sealing packing assembly, and the deviation adjusting assembly clamps the polished rod, so that the polished rod can coincide with the center line of the bidirectional locking sealing automatic deviation adjusting high-pressure blowout preventer. And therefore, partial position of the packing in the sealing packing assembly is further prevented from being eccentrically worn by the polished rod.

Description

Technical Field

[0001] The present invention relates to the field of oil extraction equipment engineering, and in particular, to a two-way locking and sealing automatic deviation-adjusting high-pressure blowout preventer device. Background Art

[0002] Currently, in oilfield production, oil wells are one of the important production equipment. Due to the accuracy error during the installation of the pumping unit, there is a lateral displacement deviation between the center line of the polished rod at the wellhead and the center of the hanger, or the foundation of the pumping unit subsides, resulting in the deviation of the walking beam of the pumping unit. During its operation, the polished rod of the pumping unit is prone to deviation from the wellhead, that is, the center line of the polished rod deviates from the center line of the wellhead. Conventional stuffing boxes do not have the function of adjusting the eccentricity between the polished rod of the pumping unit and the wellhead, resulting in eccentric wear between the polished rod and the stuffing box during operation. As the polished rod moves up and down repeatedly, it undergoes eccentric wear with the stuffing box, leading to the extrusion and eccentric wear of the polished rod and the packing, making the packing unable to seal the polished rod, resulting in crude oil leakage. At this time, the pumping unit needs to be shut down, and new packing needs to be replaced frequently, increasing the number of operations and the shutdown time of the well, thereby reducing the oil production efficiency, polluting the environment, and at the same time increasing the labor intensity of employees and material consumption. Summary of the Invention

[0003] The present invention provides a two-way locking and sealing automatic deviation-adjusting high-pressure blowout preventer device, which ensures the concentricity between the polished rod and the wellhead, avoids the deviation of the polished rod from the packing sealing device, avoids the eccentric wear of the polished rod on the packing, and prolongs the service life of the blowout preventer box.

[0004] In view of this, the present invention proposes a two-way locking and sealing automatic deviation-adjusting high-pressure blowout preventer device, including: a sealing packing assembly; a valve body; a first sealing member, one end of which is connected to the sealing packing assembly and the other end of which is rotatably connected to one end of the valve body; a clamp member; a second sealing member, connected to the other end of the valve body and the other end of which is rotatably connected to the clamp member; a deviation-adjusting assembly, including a left deviation-adjusting assembly and a right deviation-adjusting assembly, the left deviation-adjusting assembly and the right deviation-adjusting assembly are arranged face to face on the valve body, the left deviation-adjusting assembly and the right deviation-adjusting assembly are arranged at the same height on the valve body, and one end of the left deviation-adjusting assembly and one end of the right deviation-adjusting assembly both extend into the interior of the valve body; the polished rod sequentially passes through the sealing packing assembly, the first sealing member, the valve body, the second sealing member and the clamp member, and the left deviation-adjusting assembly and the right deviation-adjusting assembly can clamp the polished rod.

[0005] In some alternative embodiments, the first sealing member includes a first sealing body, a first sealing ring and a third compression cap, the first sealing body is connected to the sealing packing assembly, a first sealing ring is arranged between the first sealing body and the valve body, and the third compression cap is respectively connected to the first sealing body and the valve body.

[0006] In some alternative embodiments, the first sealing body includes a first cylindrical portion and a first spherical sealing portion. The first cylindrical portion is threadedly connected to the packing seal assembly. The first spherical sealing portion is provided with a first sealing groove, and the first sealing ring is disposed in the first sealing groove. The third compression cap is respectively connected to the first spherical sealing portion and the valve body.

[0007] In some alternative embodiments, the first sealing ring is made of fluororubber.

[0008] In some alternative embodiments, the second sealing component includes a second sealing body, a second sealing ring, and a second compression cap. The second sealing body is connected to the valve body. A first sealing ring is provided between the second sealing body and the clamp component. The second compression cap is respectively connected to the second sealing body and the clamp component.

[0009] In some alternative embodiments, the second sealing body includes a second cylindrical portion and a second spherical sealing portion. The second cylindrical portion is threadedly connected to the valve body. The second spherical sealing portion is provided with a second sealing groove, and the second sealing ring is disposed in the second sealing groove. The second compression cap is respectively connected to the second spherical sealing portion and the clamp component.

[0010] In some alternative embodiments, the second sealing ring is made of fluororubber.

[0011] In some alternative embodiments, the valve body is provided with a first through hole and a second through hole. The first through hole and the second through hole are at the same height of the valve body. The first through hole and the second through hole are arranged face to face. The left alignment component passes through the first through hole, and the right alignment component passes through the second through hole.

[0012] In some alternative embodiments, the left alignment component and the right alignment component have the same structure. The left alignment component includes a first handle, a first lead screw, a first valve cover, and a first gate plate. The first valve cover is disposed on the valve body. One end of the first gate plate is connected to the first valve cover, and the other end of the first gate plate is disposed inside the valve body. One end of the first lead screw is connected to the first handle, and the other end of the first lead screw passes through the first valve cover.

[0013] In some alternative embodiments, the packing seal assembly includes a compression cap assembly, a necked packing assembly, a first tapered packing assembly, a pressing component, a second tapered packing assembly, and a sealing body. The sealing body has an accommodation space. The sealing body is respectively connected to the compression cap assembly and the first sealing component. The necked packing assembly, the first tapered packing assembly, the pressing component, and the second tapered packing assembly are sequentially arranged inside the sealing body.

[0014] The present invention has the following technical effects compared with the prior art:

[0015] The present invention provides a bidirectional locking and sealing automatic alignment high-pressure blowout preventer, comprising: a sealing packing assembly, a valve body, a first sealing member, a clamp member, a second sealing member, and an alignment assembly. The polished rod sequentially penetrates through the sealing packing assembly, the first sealing member, the valve body, the second sealing member, and the clamp member. One end of the first sealing member is connected to the sealing packing assembly, and the other end of the first sealing member is rotatably connected to one end of the valve body. The second sealing member is connected to the other end of the valve body, and the other end of the second sealing member is rotatably connected to the clamp member. During the up and down movement of the polished rod inside the bidirectional locking and sealing automatic alignment high-pressure blowout preventer, the first sealing member can rotate around the clamp member, thereby driving the sealing packing assembly to rotate. The sealing packing assembly rotates around the polished rod, and the second sealing member can rotate around the clamp member, enabling the sealing packing assembly to contact the polished rod at various angles, avoiding partial wear of the packing inside the sealing packing assembly caused by the polished rod. The alignment assembly includes a left alignment assembly and a right alignment assembly. The left alignment assembly and the right alignment assembly are arranged face to face on the valve body, at the same height on the valve body. One end of the left alignment assembly and one end of the right alignment assembly both extend into the interior of the valve body. The left alignment assembly and the right alignment assembly move towards each other to clamp the polished rod, enabling the polished rod to coincide with the center line of the bidirectional locking and sealing automatic alignment high-pressure blowout preventer, thereby further avoiding partial wear of the packing inside the sealing packing assembly caused by the polished rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a cross-sectional structural schematic diagram of a bidirectional locking and sealing automatic alignment high-pressure blowout preventer provided by an embodiment of the present invention;

[0018] Figure 2 is Figure 1 a partial cross-sectional structural schematic diagram of the bidirectional locking and sealing automatic alignment high-pressure blowout preventer of the provided embodiment.

[0019] Wherein, Figures 1 to 2 the corresponding relationship between the reference numerals in

[0020] 1 - Sealing packing assembly; 11 - Compression cap assembly; 111 - First compression cap; 112 - Valve cover body; 12 - Necking packing assembly; 121 - Upper pressing plate; 122 - Necking packing; 123 - Lower pressing plate; 13 - First tapered packing assembly; 131 - Bushing; 132 - First tapered packing; 14 - Pressing component; 15 - Second tapered packing assembly; 151 - Packing box; 152 - Second tapered packing; 16 - Sealing body; 2 - Valve body; 3 - First sealing component; 31 - First sealing body; 311 - First cylindrical part; 312 - First spherical sealing part; 32 - First sealing ring; 33 - Third compression cap; 4 - Clamp component; 5 - Second sealing component; 51 - Second sealing body; 511 - Second cylindrical part; 512 - Second spherical sealing part; 52 - Second sealing ring; 53 - Second compression cap; 6 - Alignment adjustment assembly; 61 - Left alignment adjustment assembly; 611 - First handle; 612 - First lead screw; 613 - First valve cover; 614 - First gate plate; 62 - Right alignment adjustment assembly; 621 - Second handle; 622 - Second lead screw; 623 - Second valve cover; 624 - Second gate plate. Detailed implementation mode

[0021] In order to be able to more clearly understand the above - mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0022] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0023] At present, in oil - field production, oil wells are one of the important production facilities. Due to the accuracy error during the installation of the pumping unit, there is a lateral displacement deviation between the center line of the polished rod at the wellhead and the center of the hanger, or the foundation of the pumping unit sinks, resulting in the deviation of the walking beam of the pumping unit. During its operation, the polished rod of the pumping unit and the wellhead are prone to deviation, that is, the center line of the polished rod and the wellhead deviates. Conventional packing boxes do not have the adjustment function for adjusting the eccentricity between the polished rod of the pumping unit and the wellhead. During operation, eccentric wear occurs between the polished rod and the packing box. As the polished rod moves up and down repeatedly, eccentric wear occurs with the packing box, resulting in extrusion eccentric wear between the polished rod and the packing, making the packing unable to seal the polished rod, leading to crude oil leakage. At this time, the pumping unit needs to be shut down, and new packing needs to be replaced frequently, increasing the number of operations and the shut - in time of the well, thus reducing the oil production efficiency, polluting the environment, and at the same time increasing the labor intensity of employees and material consumption.

[0024] The present invention provides a two-way locking and sealing automatic alignment high-pressure blowout preventer, which ensures the concentricity between the polished rod and the wellhead, avoids the deviation of the polished rod from the packing sealing device, avoids the eccentric wear of the polished rod on the packing, and prolongs the service life of the blowout preventer box.

[0025] The present invention provides a two-way locking and sealing automatic alignment high-pressure blowout preventer. The two-way locking and sealing automatic alignment high-pressure blowout preventer includes: a packing sealing assembly 1; a valve body 2; a first sealing member 3, one end of which is connected to the packing sealing assembly 1 and the other end of which is rotatably connected to one end of the valve body 2; a clamp member 4; a second sealing member 5, which is connected to the other end of the valve body 2 and the other end of which is rotatably connected to the clamp member 4; an alignment assembly 6, which includes a left alignment assembly 61 and a right alignment assembly 62. The left alignment assembly 61 and the right alignment assembly 62 are arranged face to face on the valve body 2, the left alignment assembly 61 and the right alignment assembly 62 are arranged at the same height on the valve body 2, and one end of the left alignment assembly 61 and one end of the right alignment assembly 62 both extend into the interior of the valve body 2. The polished rod sequentially passes through the packing sealing assembly 1, the first sealing member 3, the valve body 2, the second sealing member 5 and the clamp member 4, and the left alignment assembly 61 and the right alignment assembly 62 can clamp the polished rod.

[0026] Specifically, during the up and down movement of the polished rod inside the two-way locking and sealing automatic alignment high-pressure blowout preventer, the first sealing member 3 can rotate around the clamp member 4, so as to drive the packing sealing assembly 1 to rotate. The packing sealing assembly 1 rotates around the polished rod, and the second sealing member 5 can rotate around the clamp member 4, so that the packing sealing assembly 1 contacts the polished rod at various angles, avoiding the eccentric wear of the packing at some positions inside the packing sealing assembly 1 by the polished rod. The left alignment assembly 61 and the right alignment assembly 62 move towards each other to clamp the polished rod, so that the polished rod can coincide with the center line of the two-way locking and sealing automatic alignment high-pressure blowout preventer, further avoiding the eccentric wear of the packing at some positions inside the packing sealing assembly 1 by the polished rod, and thus prolonging the service life of the packing inside the packing sealing assembly 1.

[0027] In some alternative embodiments, the packing sealing assembly 1 includes a compression cap assembly 11, a necking packing assembly 12, a first tapered packing assembly 13, a pressing member 14, a second tapered packing assembly 15 and a sealing body 16. The sealing body 16 has an accommodating space, and the sealing body 16 is respectively connected to the compression cap assembly 11 and the first sealing member 3. The necking packing assembly 12, the first tapered packing assembly 13, the pressing member 14 and the second tapered packing assembly 15 are sequentially arranged inside the sealing body 16.

[0028] Specifically, the compression cap assembly 11 includes a first compression cap 111 and a valve cover body 112. The first compression cap 111 is processed from 45# steel pipe. The top of the first compression cap 111 is processed into a hexagon. The first compression cap 111 can be adjusted in tightness with a wrench. The lower surface of the first compression cap 111 is processed with threads, and the outer surface of the first compression cap 111 is in threaded fit with the inner surface of the valve cover body 112. The valve cover body 112 is processed from 45# steel pipe. The inner surface of the lower end of the valve cover body 112 is processed with threads, and the outer surface of the upper end of the sealing body 16 is provided with threads. The inner surface of the valve cover body 112 is in threaded connection with the outer surface of the sealing body 16, and the valve cover body 112 and the sealing body 16 are connected as a whole.

[0029] Further, the reduced-diameter packing assembly 12 includes an upper pressing plate 121, a reduced-diameter packing 122, and a lower pressing plate 123. The reduced-diameter packing 122 is made of polyurethane rubber material. The inner diameter of the reduced-diameter packing 122 is processed to be slightly larger than the polished rod diameter. Chamfering treatments are respectively performed on the upper and lower end faces of the reduced-diameter packing 122. Both the upper pressing plate 121 and the lower pressing plate 123 are processed from 45# steel. For the convenience of installation, the upper pressing plate 121 and the lower pressing plate 123 are respectively processed into two semi-circles and are installed after being butted during use. Chamfering treatments are respectively performed on the upper and lower ends of the upper pressing plate 121 and the lower pressing plate 123 for cooperation with the reduced-diameter packing 122. During operation, by tightening the first compression cap 111, the upper pressing plate 121 and the lower pressing plate 123 are pressed tightly, so as to apply pressure to the reduced-diameter packing 122, and the sealing effect is achieved through its deformation to prevent the medium from spraying out.

[0030] Further, the first tapered packing assembly 13 includes a bushing 131 and a first tapered packing 132. The first tapered packing 132 is arranged inside the bushing 131. The first tapered packing 132 is made of hydrogenated nitrile material and is in a spiral shape as a whole, and its outer part is processed into a cone. When being extruded, the sealing effect is achieved again through its deformation. The bushing 131 is processed from 45# steel pipe. The inner part of the bushing 131 is processed into a stepped shape, and the diameter of the upper part of the bushing 131 is larger than that of the lower part. The upper part of the bushing 131 is used for installing the lower pressing plate 123, the reduced-diameter packing 122, and the upper pressing plate 121. The lower pressing plate 123 is used for installing the tapered packing 122. The first tapered packing 132 can be deformed after being compressed, and the deformation of the first tapered packing 132 plays a sealing role.

[0031] The second conical packing component 15 includes a packing box 151 and a second conical packing 152. The second conical packing 152 is arranged inside the packing box 151. The second conical packing 152 is made of hydrogenated nitrile material, is in a spiral shape as a whole, and is processed into a conical shape on the outside. When being extruded, the second conical packing 152 deforms to play a triple sealing role. The packing box 151 is processed from a 45# steel round tube into two semi-circles. The inner surface of the packing box 151 is smooth. The inner diameter of the packing box 151 is slightly larger than the outer diameter of the second conical packing 152, playing a wrapping role to prevent the second conical packing 152 from being damaged due to excessive deformation and affecting the sealing effect.

[0032] Further, the pressing member 14 is a gland. The pressing member 14 is processed from 45# steel. For the convenience of installation, the pressing member 14 is respectively processed into two semi-circles. During use, the two semi-circles are butt-jointed and installed. To increase the stability of the pressing member 14, the interface of the pressing member 14 is processed into a "bow" shape, playing a role in supporting the first conical packing 132 and dividing the second conical packing 152.

[0033] Further, the valve body 2 is made of 45# steel. The inner end face at the top of the valve body 2 is processed into a spherical shape, and the top of the valve body 2 works in spherical cooperation with the bottom of the first sealing member 3.

[0034] In some alternative embodiments, the first sealing member 3 includes a first sealing body 31, a first sealing ring 32, and a third pressing cap 33. The first sealing body 31 is connected to the sealing packing component 1. A first sealing ring 32 is arranged between the first sealing body 31 and the valve body 2. The third pressing cap 33 is respectively connected to the first sealing body 31 and the valve body 2.

[0035] Specifically, the first sealing member 3 can rotate around the clamping component 4, thereby driving the sealing packing component 1 to rotate. The sealing packing component 1 rotates around the polished rod. The second sealing member 5 can rotate around the clamping component 4, enabling the sealing packing component 1 to contact the polished rod at various angles, avoiding partial wear of the packing inside the sealing packing component 1 caused by the polished rod at some positions.

[0036] In some alternative embodiments, the first sealing body 31 includes a first cylindrical part 311 and a first spherical sealing part 312. The first cylindrical part 311 is threadedly connected to the sealing packing component 1. The first spherical sealing part 312 is provided with a first sealing groove. The first sealing ring 32 is arranged in the first sealing groove. The third pressing cap 33 is respectively connected to the first spherical sealing part 312 and the valve body 2.

[0037] Specifically, the first cylindrical part 311 and the first spherical sealing part 312 are integrally formed. The outer surface of the first cylindrical part 311 is threadedly connected to the inner surface of the lower end of the sealing body 16. The inner surface of the first cylindrical part 311 is threadedly connected to the outer surface of the packing box 151.

[0038] In some alternative embodiments, the first sealing ring 32 is made of fluororubber.

[0039] Specifically, the first sealing ring 32 is made of fluororubber. The outer diameter of the first sealing ring 32 cooperates with the first sealing groove to function as a seal.

[0040] In some alternative embodiments, the second sealing member 5 includes a second sealing body 51 and a second sealing ring 52. The second sealing body 51 is connected to the valve body 2. A first sealing ring 32 is provided between the second sealing body 51 and the clamp member 4. The second compression cap 53 is respectively connected to the second sealing body 51 and the clamp member 4.

[0041] In some alternative embodiments, the second sealing body 51 includes a second cylindrical portion 511 and a second spherical sealing portion 512. The second cylindrical portion 511 is threadedly connected to the valve body 2. The second spherical sealing portion 512 is provided with a second sealing groove. The second sealing ring 52 is disposed in the second sealing groove. The second compression cap 53 is respectively connected to the second spherical sealing portion 512 and the clamp member 4.

[0042] In some alternative embodiments, the second sealing ring 52 is made of fluororubber.

[0043] Specifically, the second sealing ring 52 is made of fluororubber. The outer diameter of the second sealing ring 52 cooperates with the second sealing groove to function as a seal.

[0044] In some alternative embodiments, the valve body 2 is provided with a first through hole and a second through hole. The first through hole and the second through hole are at the same height of the valve body 2. The first through hole and the second through hole are arranged face to face. The left alignment component 61 passes through the first through hole, and the right alignment component 62 passes through the second through hole.

[0045] In some alternative embodiments, the left alignment component 61 and the right alignment component 62 have the same structure. The left alignment component 61 includes a first handle 611, a first lead screw 612, a first valve cover 613, and a first gate plate 614. The first valve cover 613 is disposed on the valve body 2. One end of the first gate plate 614 is connected to the first valve cover 613, and the other end of the first gate plate 614 is disposed inside the valve body 2. One end of the first lead screw 612 is connected to the first handle 611, and the other end of the first lead screw 612 passes through the first valve cover 613.

[0046] Further, the first valve cover 613 is welded to the valve body 2. The first handle 611 is made of 45# round steel. A through hole is opened at the center position of the first handle 611 in the direction perpendicular to its own axis. The through hole of the first handle 611 is used to cooperate with the second lead screw 622. By rotating the first handle 611, the second lead screw 622 rotates to generate displacement. The first lead screw 612 is machined from 45# steel. The left side of the first lead screw 612 is machined into a square shape, and the right side of the first lead screw 612 is machined into a conical shape. The first lead screw 612 is connected to the first gate plate 614 for relative rotational movement. The surface of the first gate plate 614 is machined into a trapezoidal thread and cooperates with the trapezoidal thread hole at the center of the first valve cover 613. By driving the first lead screw 612 to rotate by the first handle 611 to generate displacement, the first gate plate 614 is driven to move horizontally. The first valve cover 613 is made of 45# steel round pipe. After welding a steel plate to the left side of the first valve cover 613, a through hole thread is machined at the center position of the first valve cover 613 for cooperating with the first lead screw 612 and also plays a role in connecting and fastening. The first valve cover 613 is made of thick steel plate. A groove is machined on the left side of the first valve cover 613 to connect with the first lead screw 612. The right side of the first gate plate 614 is machined into a semi-circular shape. The inner diameter of the first gate plate 614 matches the outer diameter of the polished rod. During use, by rotating the first handle 611, the first handle 611 drives the first lead screw 612 to move. During the movement of the first lead screw 612, it presses against the first gate plate 614. The inner diameter of the first gate plate 614 matches the outer diameter of the polished rod, thereby playing a role in fastening and sealing.

[0047] In some alternative embodiments, the right offset adjustment assembly 62 includes a second handle 621, a second lead screw 622, a second valve cover 623, and a second gate plate 624. The second valve cover 623 is disposed on the valve body 2. One end of the second gate plate 624 is connected to the second valve cover 623, and the other end of the second gate plate 624 is disposed inside the valve body 2. One end of the second lead screw 622 is connected to the second handle 621, and the other end of the second lead screw 622 penetrates through the second valve cover 623.

[0048] Specifically, the second valve cover 623 is welded to the valve body 2. The second handle 621 is made of 45# round steel. A through hole is opened at the center position in the direction perpendicular to the axis of the second handle 621. The second handle 621 is used in cooperation with the second lead screw 622. By rotating the second handle 621, the second lead screw 622 rotates to generate displacement. The second lead screw 622 is machined from 45# steel. The right side of the second lead screw 622 is machined into a square shape, and the left side of the second lead screw 622 is machined into a conical shape. The second lead screw 622 is connected to the second gate plate 624 for relative rotational movement. The surface of the second lead screw 622 is machined into a trapezoidal thread and is in cooperation with the trapezoidal threaded hole at the center of the second valve cover 623. The central axis of the trapezoidal threaded hole at the center of the second valve cover 623 coincides with the central axis of the first through hole of the valve body 2. By rotating the second handle 621 to drive the second lead screw 622 to rotate and generate displacement, the second gate plate 624 is driven to move horizontally. The second valve cover 623 is made of a 45# steel round pipe. After welding a steel plate to the left side of the second valve cover 623, a through hole thread is machined at the center position of the second valve cover 623 for cooperation with the second lead screw 622 and also plays a role in connection and fastening. The second gate plate 624 is made of a thick steel plate. A groove is machined on the right side of the second gate plate 624 for connection with the second lead screw 622. The left side of the second gate plate 624 is machined into a semi-circular shape, and the inner diameter of the second gate plate 624 matches the outer diameter of the polished rod. When in use, by rotating the second handle 621, the second handle 621 drives the second lead screw 622 to move. During the movement of the second lead screw 622, it presses against the second gate plate 624, and the inner diameter of the second gate plate 624 matches the outer diameter of the polished rod, thereby playing a role in fastening and sealing.

[0049] When the left offset adjustment assembly 61 and the right offset adjustment assembly 62 are in use, by simultaneously rotating the first handle 611 and the second handle 621, the first gate plate 614 and the second gate plate 624 are driven to move respectively towards the center direction of the polished rod. The left offset adjustment assembly 61 and the right offset adjustment assembly 62 cooperate to play a role in sealing and fixing.

[0050] In some alternative embodiments, the clamp component 4 is a clamp head. The clamp head is made of a 45# steel round pipe. The upper end surface of the top of the clamp head is machined into a spherical surface. The upper end surface of the top of the clamp head is fitted and installed with the spherical end surface of the second sealing component. The outer surface above the clamp head is machined with threads. The clamp head and the second compression cap 53 are connected and combined into a whole through the internal threads of the second compression cap 53. The bottom of the clamp head is machined into a trapezoidal groove for installing a sealing steel ring and then installed at the wellhead. The second compression cap 53 is made of a 45# steel round pipe. The inner surface below the second compression cap 53 is machined with threads. The second compression cap 53 is connected to the outer threads at the top of the clamp head, thereby combining into the clamp component 4.

[0051] During the up and down movement of the polished rod inside the two-way locking and sealing automatic alignment high-pressure blowout preventer, the first sealing component 3 can rotate around the clamp component 4, thereby driving the sealing packing assembly 1 to rotate. The sealing packing assembly 1 rotates around the polished rod, and the second sealing component 3 can rotate around the clamp component 4, enabling the sealing packing assembly 1 to contact the polished rod at various angles, avoiding eccentric wear on some positions of the packing inside the sealing packing assembly 1 by the polished rod. The left alignment component 61 and the right alignment component 62 move towards each other to clamp the polished rod, making the polished rod coincide with the center line of the two-way locking and sealing automatic alignment high-pressure blowout preventer, further avoiding eccentric wear on some positions of the packing inside the sealing packing assembly 1 by the polished rod, and thus extending the service life of the packing inside the sealing packing assembly 1.

[0052] In the present invention, the term "a plurality of" refers to at least two or more than two, unless otherwise clearly defined. Terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected to" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A two-way locking and sealing automatic alignment high-pressure blowout preventer, characterized in that, it includes: a packing seal assembly (1); a valve body (2); a first sealing component (3), one end of which is connected to the packing seal assembly (1), and the other end is rotatably connected to one end of the valve body; a clamp component (4); a second sealing component (5), connected to the other end of the valve body (2), and the other end is rotatably connected to the clamp component (4); an alignment component (6), including a left alignment component (61) and a right alignment component (62), the left alignment component (61) and the right alignment component (62) are arranged face to face on the valve body (2), the left alignment component (61) and the right alignment component (62) are arranged at the same height on the valve body (2), and one end of the left alignment component (61) and one end of the right alignment component (62) both extend into the interior of the valve body (2); a polished rod sequentially penetrates through the packing seal assembly (1), the first sealing component (3), the valve body (2), the second sealing component (5) and the clamp component (4), and the left alignment component (61) and the right alignment component (62) can clamp the polished rod.

2. The two-way locking and sealing automatic alignment high-pressure blowout preventer according to claim 1, characterized in that, the first sealing component (3) includes a first sealing body (31), a first sealing ring (32) and a third compression cap (33), the first sealing body (31) is connected to the packing seal assembly (1), a first sealing ring (32) is arranged between the first sealing body (31) and the valve body (2), and the third compression cap (33) is respectively connected to the first sealing body (31) and the valve body (2).

3. The two-way locking and sealing automatic alignment high-pressure blowout preventer according to claim 2, characterized in that, the first sealing body (31) includes a first cylindrical portion (311) and a first spherical sealing portion (312), the first cylindrical portion (311) is threadedly connected to the packing seal assembly (1), the first spherical sealing portion (312) is provided with a first sealing groove, the first sealing ring (32) is arranged in the first sealing groove, and the third compression cap (33) is respectively connected to the first spherical sealing portion (312) and the valve body (2).

4. The two-way locking and sealing automatic alignment high-pressure blowout preventer according to claim 1, characterized in that, the material of the first sealing ring (32) is fluororubber.

5. The two-way locking and sealing automatic alignment high-pressure blowout preventer according to claim 1, characterized in that, the second sealing component (5) includes a second sealing body (51), a second sealing ring (52) and a second compression cap (53), the second sealing body (51) is connected to the valve body (2), a first sealing ring (32) is arranged between the second sealing body (51) and the clamp component (4), and the second compression cap (53) is respectively connected to the second sealing body (51) and the clamp component (4).

6. The two-way locking and sealing automatic alignment high-pressure blowout preventer according to claim 5, characterized in that, The second sealing body (51) includes a second cylindrical portion (511) and a second spherical sealing portion (512). The second cylindrical portion (511) is threadedly connected to the valve body (2). The second spherical sealing portion (512) is provided with a second sealing groove, and the second sealing ring (52) is disposed in the second sealing groove. The second pressing cap (53) is respectively connected to the second spherical sealing portion (512) and the clamp member (4).

7. The two-way locking and sealing automatic deviation adjustment high-pressure blowout preventer according to claim 5, wherein, the second sealing ring (52) is made of fluororubber material.

8. The two-way locking and sealing automatic deviation adjustment high-pressure blowout preventer according to claim 1, wherein, the valve body (2) is provided with a first through hole and a second through hole. The first through hole and the second through hole are at the same height of the valve body (2). The first through hole and the second through hole are arranged face to face. The left deviation adjustment assembly (61) penetrates through the first through hole, and the right deviation adjustment assembly (62) penetrates through the second through hole.

9. The two-way locking and sealing automatic deviation adjustment high-pressure blowout preventer according to claim 8, wherein, the left deviation adjustment assembly (61) and the right deviation adjustment assembly (62) have the same structure; the left deviation adjustment assembly (61) includes a first handle (611), a first lead screw (612), a first valve cover (613) and a first gate plate (614). The first valve cover (613) is disposed on the valve body (2). One end of the first gate plate (614) is connected to the first valve cover (613), and the other end of the first gate plate (614) is disposed inside the valve body (2). One end of the first lead screw (612) is connected to the first handle (611), and the other end of the first lead screw (612) penetrates through the first valve cover (613).

10. The two-way locking and sealing automatic deviation adjustment high-pressure blowout preventer according to claim 1, wherein, the packing seal assembly (1) includes a pressing cap assembly (11), a necking packing assembly (12), a first tapered packing assembly (13), a pressing member (14), a second tapered packing assembly (15) and a sealing body (16). The sealing body (16) has an accommodating space. The sealing body (16) is respectively connected to the pressing cap assembly (11) and the first sealing member (3). The necking packing assembly (12), the first tapered packing assembly (13), the pressing member (14) and the second tapered packing assembly (15) are sequentially arranged inside the sealing body (16).

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