Blowout preventer and sand prevention device thereof

Abstract

The utility model discloses a blowout preventer and drilling blowout preventer sand prevention device, relate to blowout preventer sand prevention technical field, drilling blowout preventer sand prevention device includes: blowout preventer body, the protection ring is located at the top of blowout preventer body, and the top of protection ring is provided with recess, and the inside of recess is equipped with the telescopic sheltering cylinder, and the both sides of sheltering cylinder are connected with the telescopic end of telescopic link, and the fixed end of telescopic link is located at the top of protection ring side, and the inside of sheltering cylinder is connected with the top of blowout preventer body, sand prevention sealing mechanism is sealedly connected with the inside of sheltering cylinder to prevent sand grain from entering blowout preventer body through the gap, and the cover is combined and arranged at the top of sand prevention sealing mechanism. The device can effectively avoid the damage of blowout preventer caused by sand grain entering the inside of blowout preventer by setting protection ring and sand prevention sealing mechanism and other components, and the component shedding phenomenon does not appear when the blowout preventer is running.

Description

Technical Field

[0001] This utility model relates to the field of blowout preventer sand control technology, and more specifically, to a drilling blowout preventer sand control device. Furthermore, it also relates to a blowout preventer including the aforementioned drilling blowout preventer sand control device. Background Technology

[0002] In existing technologies, the blowout preventer (BOP) is the most important well control equipment. In the event of emergencies such as overflows, kicks, or blowouts during drilling operations, the BOP needs to be activated quickly to shut down the well. Failure of the BOP at this time can lead to serious accidents such as blowouts. Due to the windy and sandy environment in oil extraction, the internal rubber core and gate of the BOP are easily damaged, making effective well shut-off impossible. Furthermore, traditional sand control methods mostly involve covering the gaps in the BOP with plastic sheeting. However, this method cannot completely seal off sand and prevent it from entering the BOP. In addition, the plastic sheeting is easily blown off, potentially causing injury.

[0003] In summary, how to provide an effective sand-proof device that prevents sand leakage through the gaps of a blowout preventer is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a sand prevention device for a drilling blowout preventer, which can effectively ensure that sand does not leak through the gaps of the blowout preventer.

[0005] Another objective of this invention is to provide a blowout preventer that includes the aforementioned sand-prevention device for drilling blowout preventers.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A drilling blowout preventer sand control device, comprising:

[0008] Blowout preventer body;

[0009] A protective ring is provided on the top of the blowout preventer body. A groove is provided on the top of the protective ring. A retractable shielding cylinder is provided inside the groove. The two sides of the shielding cylinder are connected to the telescopic ends of the telescopic rod. The fixed end of the telescopic rod is located on the top of the side of the protective ring. The inner side of the shielding cylinder is connected to the top of the blowout preventer body.

[0010] A sand-proof sealing mechanism is sealed to the inside of the shielding cylinder to prevent sand particles from entering the blowout preventer body through gaps;

[0011] A cover is placed on top of the sand-proof sealing mechanism.

[0012] In one embodiment, the sand-proof sealing mechanism includes an installation sealing ring disposed inside the shielding cylinder.

[0013] In one embodiment, a sealing groove is provided on the top of the mounting sealing ring, and a sand-proof sealing ring is provided inside the sealing groove.

[0014] In one embodiment, a gap is reserved between the sand-proof sealing ring and the inner wall of the mounting sealing ring, and a locking ring is provided inside the gap.

[0015] In one embodiment, the sand-proof sealing ring has sealing grooves on both its inner and outer sides, and the inner side of the locking ring has a sealing ring, which is sealed and engaged with the sealing groove.

[0016] In one embodiment, the tops of the two engaging retaining rings are threadedly connected to the top of the mounting sealing ring via threaded pins.

[0017] In one embodiment, the bottom end of the sand-proof sealing ring has a conical structure.

[0018] In one embodiment, the sand-proof sealing ring has threaded rods on both sides of its top, and the cover has threaded pin holes on its top for inserting the threaded rods. The threaded rods are used to lock the sand-proof sealing ring and the cover with nuts.

[0019] In one embodiment, the cover includes a fastening ring fitted around the outside of the protective ring and a protective cover on top of the fastening ring. The fastening ring has at least two fastening pins on its outer side, which are used to lock the protective cover.

[0020] A blowout preventer, comprising the sand-prevention device for drilling blowout preventers as described in any of the preceding claims.

[0021] When using the sand-proof device for a blowout preventer (BOP) provided by this utility model, a protective ring is installed on the top of the BOP body, and a retractable shielding cylinder is installed in the groove at the top of the protective ring. During use, the shielding cylinder moves in and out under the action of the telescopic rods on both sides of the protective ring (which can extend and retract electrically or synchronously under external force), thus making the shielding cylinder move up and down synchronously with the pressure fluctuations inside the BOP to block sand particles from the outside of the BOP. Moreover, the sand-proof sealing mechanism is sealed to the inside of the shielding cylinder, which can also effectively prevent sand particles from entering the BOP body through gaps. Furthermore, the cover is closed on the top of the sand-proof sealing mechanism, which can also prevent sand particles from entering the BOP body from the top of the sand-proof sealing mechanism. In other words, by setting up components such as the protective ring and the sand-proof sealing mechanism, this device can effectively prevent sand particles from entering the BOP and causing damage to the BOP, and will not cause components to fall off during BOP operation.

[0022] In summary, the drilling blowout preventer sand prevention device provided by this utility model can effectively ensure that sand does not leak through the gaps of the blowout preventer.

[0023] In addition, this utility model also provides a blowout preventer that includes the above-mentioned sand-prevention device for drilling blowout preventers. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is an exploded view of the drilling blowout preventer sand control device provided by this utility model;

[0026] Figure 2 This is a schematic diagram of the sand-prevention device for the well blowout preventer provided by this utility model.

[0027] Figure 3 Exploded view of the protective ring, sand-proof sealing mechanism, and covering;

[0028] Figure 4 This is an exploded view of the protective ring and sand-proof sealing mechanism.

[0029] Figures 1-4 middle:

[0030] 1 is the blowout preventer body, 2 is the protective ring, 201 is the groove, 202 is the shielding cylinder, 203 is the telescopic rod, 3 is the sand-proof sealing mechanism, 301 is the installation sealing ring, 302 is the sealing groove, 303 is the sand-proof sealing ring, 304 is the sealing engagement groove, 305 is the engagement fixing ring, 3051 is the threaded pin, 4 is the sealing retaining ring, 5 is the threaded rod, 501 is the nut, 6 is the cover, 601 is the fastening pin, 602 is the protective cover, and 603 is the fastening ring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The core of this utility model is to provide a sand-proof device for a drilling blowout preventer, which can effectively ensure that sand does not leak through the gaps of the blowout preventer. Another core aspect of this utility model is to provide a blowout preventer that includes the aforementioned sand-proof device.

[0033] Please refer to Figure 1 and Figure 2 This specific embodiment provides a drilling blowout preventer sand control device, including:

[0034] Blowout preventer body 1;

[0035] The protective ring 2 is located on the top of the blowout preventer body 1. The top of the protective ring 2 has a groove 201. The inside of the groove 201 is a retractable shielding cylinder 202. The two sides of the shielding cylinder 202 are connected to the telescopic ends of the telescopic rod 203. The fixed end of the telescopic rod 203 is located on the top of the side of the protective ring 2. The inner side of the shielding cylinder 202 is connected to the top of the blowout preventer body 1.

[0036] Sand-proof sealing mechanism 3 is sealed to the inside of shielding cylinder 202 (which can be made of rubber or plastic) to prevent sand particles from entering the blowout preventer body 1 through gaps;

[0037] Cover 6, which is attached to the top of the sand-proof sealing mechanism 3.

[0038] It should be noted that the telescopic rod 203 can be configured as an electric telescopic rod. An electric telescopic rod, also known as an electric push rod or linear actuator, is a device that converts the rotary motion of an electric motor into the linear reciprocating motion of a push rod. Due to its simple structure, precise control, and strong thrust, it has been widely adopted in various fields such as home, industry, and medicine. An electric telescopic rod includes a motor, a transmission system (including a reduction mechanism, a lead screw, and a nut), a guide mechanism, and limit switches. After the motor starts, its rotary motion is transmitted to the lead screw via the reduction mechanism. The lead screw drives the nut to move axially, thereby pushing the push rod to complete the linear extension and retraction. The limit switches monitor the position in real time to ensure safe stopping. Of course, the structural type and dimensions of the telescopic rod 203 can also be determined according to the actual situation and needs.

[0039] In practical applications, the shape, structure, type, size, and material of the blowout preventer body 1, protective ring 2, sand-proof sealing mechanism 3, and cover 6 can be determined according to the actual situation and needs.

[0040] When using the drilling blowout preventer sand prevention device provided by this utility model, a protective ring 2 is provided on the top of the blowout preventer body 1. A retractable shielding cylinder 202 is installed in the groove 201 at the top of the protective ring 2. During use, the shielding cylinder 202 moves in and out of the protective ring 2 through the telescopic rods 203 on both sides (which can extend and retract electrically or synchronously under external force). This allows the shielding cylinder 202 to move up and down synchronously with the pressure fluctuations inside the blowout preventer, thus blocking sand particles from entering the blowout preventer. Furthermore, the sand-proof sealing mechanism 3 is sealed to the inside of the shielding cylinder 202, effectively preventing sand particles from entering the blowout preventer body 1 through gaps. Additionally, the cover 6 is fitted onto the top of the sand-proof sealing mechanism 3, also preventing sand particles from entering the blowout preventer body 1 from the top of the sand-proof sealing mechanism 3. In short, by setting up components such as the protective ring 2 and the sand-proof sealing mechanism 3, this device can effectively prevent sand particles from entering the blowout preventer and causing damage, and will not cause components to fall off during blowout preventer operation.

[0041] In summary, the drilling blowout preventer sand prevention device provided by this utility model can effectively ensure that sand does not leak through the gaps of the blowout preventer.

[0042] In one embodiment, the sand-proof sealing mechanism 3 includes an installation sealing ring 301 disposed inside the shielding cylinder 202 to seal the inside of the shielding cylinder 202 and prevent sand particles from entering the inside of the shielding cylinder 202.

[0043] In one embodiment, such as Figure 4 As shown, a sealing groove 302 is provided on the top of the mounting sealing ring 301, and a sand-proof sealing ring 303 is provided inside the sealing groove 302. That is, by providing a sealing groove 302 on the mounting sealing ring 301, the installation of the sand-proof sealing ring 303 can be facilitated, further improving the sealing effect of the sand-proof sealing mechanism 3. Moreover, both the mounting sealing ring 301 and the sand-proof sealing ring 303 can be set as annular rubber rings.

[0044] In one embodiment, a gap is provided between the sand-proof sealing ring 303 and the inner wall of the mounting sealing ring 301, and a locking ring 305 is provided inside the gap. By installing the locking ring 305 in the gap between the sand-proof sealing ring 303 and the inner wall of the mounting sealing ring 301, the mounting sealing ring 301 can be further sealed and closed.

[0045] In one embodiment, the sand-proof sealing ring 303 has sealing grooves 304 on both its inner and outer sides, and the inner side of the locking ring 305 has a sealing ring 4, which is sealed and engaged with the sealing grooves 304. During use, the sealing ring 4 facilitates the sealing engagement of the sealing grooves 304, preventing gaps. The core improvement of this application is that the original method of covering with plastic sheeting is replaced by a retractable shielding cylinder 202 and a protective cover 602 for sealing. Moreover, part of the structure of the sand-proof sealing mechanism 3 is detachable, ensuring both the sealing effect and the performance and service life.

[0046] In one embodiment, such as Figure 4 As shown, the tops of the two locking rings 305 are threadedly connected to the top of the mounting sealing ring 301 via threaded pins 3051. That is, the locking rings 305 are fixed to the top of the mounting sealing ring 301 by the threaded pins 3051 on the top of the locking rings 305 to form a sealing structure and prevent sand particles from entering the interior of the blowout preventer through gaps.

[0047] In one embodiment, the bottom end of the sand-proof sealing ring 303 has a conical structure.

[0048] It should be noted that during actual use, the tapered sandproof sealing ring 303 facilitates the sealing of the bottom of the sealing groove 302. The cooperation between the sandproof sealing ring 303, the sealing retainer ring 4, the mounting sealing ring 301, and the locking ring 305 constitutes the first level of sealing inside the protective cover 602. The effective contact between the tapered bottom of the sandproof sealing ring 303 and the bottom of the sealing groove 302 constitutes the second level of sealing inside the protective cover 602. This results in a better overall sealing effect for the protective cover 602.

[0049] In other words, when external dust breaks through the outer protective cover 602 and enters the interior, there are two sealing points between the sandproof sealing ring 303 and the mounting sealing ring 301. One is the first-stage seal at the upper part of the sandproof sealing ring 303, which engages with the first-stage seal; the other is the second-stage seal at the lower part of the sandproof sealing ring 303, which is fitted with a conical surface. Dust entering the blowout preventer needs to break through both the first-stage and second-stage seals in sequence.

[0050] In one embodiment, the sand-proof sealing ring 303 has threaded rods 5 on both sides of its top, and the cover 6 has threaded pin holes for inserting the threaded rods 5 on its top. The threaded rods 5 are locked to the sand-proof sealing ring 303 and the cover 6 by nuts 501.

[0051] It should be noted that threaded rods 5 can be installed on both sides of the top of the sand-proof sealing ring 303. The outer side of the threaded rod 5 is inserted and connected to the threaded pin hole on the top of the cover 6, and a nut 501 is threadedly connected to the outer side of the threaded rod 5. In actual use, the threaded rod 5 facilitates the fitting and fixing of the cover 6, and the nut 501 can be used to fix the cover 6 inserted and fitted on the threaded rod 5.

[0052] In one embodiment, such as Figure 3 As shown, the cover 6 includes a fastening ring 603 fitted on the outside of the protective ring 2 and a protective cover 602 on the top of the fastening ring 603. At least two fastening pins 601 are provided on the outside of the fastening ring 603, and the fastening pins 601 are used to lock the protective cover 602.

[0053] It should be noted that a fastening ring 603 can be fitted onto the outside of the protective ring 2. Several fastening pins 601 are provided on the outside of the fastening ring 603, and a protective cover 602 is provided on the top of the fastening ring 603. During use, the fastening pins 601 on the side of the fastening ring 603 facilitate fixing the fastening ring 603 to the outside of the protective ring 2. Furthermore, by fixing the protective cover 602, dust can be prevented from falling into the outside of the blowout preventer during daily use.

[0054] It should also be noted that the fastening pins 601 and the protective cover 602 on the side of the fastening ring 603 cooperate to prevent dust from falling into the outside of the blowout preventer during daily use. The groove 201 inside the protective ring 2 facilitates the extension and retraction of the shielding cylinder 202 inside the groove 201. The extension of the telescopic rods 203 on both sides of the protective ring 2 pushes the shielding cylinder 202 to extend and lift. The up and down movement of the shielding cylinder 202 is due to the pressure fluctuations during the operation of the blowout preventer, and it needs to move up and down with the pressure fluctuations. At the same time, it cooperates with the sand sealing mechanism 3 to block sand particles from the outside of the blowout preventer and prevent sand particles from entering the interior of the blowout preventer.

[0055] Furthermore, the gaps on both sides of the sand-proof sealing ring 303 facilitate the installation of the two locking rings 305, making it easy to seal and close the installation sealing ring 301. Simultaneously, the threaded pins 3051 at the top of the locking ring 305 secure it to the top of the installation sealing ring 301, forming a sealing structure to prevent sand particles from entering the blowout preventer through gaps. After the blowout preventer is used (when drilling or workover operations of a well are completed in stages, and the blowout preventer is temporarily removed from high-pressure well control, but may be restarted in the future, such as for drill string replacement or equipment maintenance), the locking method facilitates the disassembly of the sand-proof sealing ring 303 and the cover 6 when it is reused in the future.

[0056] In addition to the aforementioned drilling blowout preventer sand prevention device, this utility model also provides a blowout preventer that includes the drilling blowout preventer sand prevention device disclosed in the above embodiments. For the structure of other parts of the blowout preventer, please refer to the prior art, which will not be repeated here.

[0057] In addition, it should be noted that the orientation or positional relationship indicated by "top and bottom", "inner and outer", etc. in this application is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the purpose of simplifying the description and making it easier to understand, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Any combination of all embodiments provided by this utility model is within the protection scope of this utility model and will not be elaborated upon here.

[0059] The blowout preventer and its sand-prevention device for drilling blowout preventers provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A sand-prevention device for a drilling blowout preventer, characterized in that, include: Blowout preventer body (1); A protective ring (2) is provided on the top of the blowout preventer body (1). A groove (201) is provided on the top of the protective ring (2). A retractable shielding cylinder (202) is provided inside the groove (201). The two sides of the shielding cylinder (202) are connected to the telescopic ends of the telescopic rod (203). The fixed end of the telescopic rod (203) is located on the top of the side of the protective ring (2). The inner side of the shielding cylinder (202) is connected to the top of the blowout preventer body (1). Sand-proof sealing mechanism (3), which is sealed to the inside of the shielding cylinder (202) to prevent sand particles from entering the blowout preventer body (1) through the gap; A cover (6) is placed on top of the sand-proof sealing mechanism (3).

2. The drilling blowout preventer sand control device according to claim 1, characterized in that, The sand-proof sealing mechanism (3) includes an installation sealing ring (301) located inside the shielding cylinder (202).

3. The drilling blowout preventer sand control device according to claim 2, characterized in that, The top of the installation sealing ring (301) is provided with a sealing groove (302), and the interior of the sealing groove (302) is provided with a sand-proof sealing ring (303).

4. The drilling blowout preventer sand control device according to claim 3, characterized in that, A gap is reserved between the sand-proof sealing ring (303) and the inner wall of the installation sealing ring (301), and a locking ring (305) is provided inside the gap.

5. The drilling blowout preventer sand control device according to claim 4, characterized in that, The sand-proof sealing ring (303) has sealing grooves (304) on both the inner and outer sides, and the inner side of the locking ring (305) has a sealing ring (4), which is sealed and engaged with the sealing groove (304).

6. The drilling blowout preventer sand control device according to claim 4, characterized in that, The tops of the two locking rings (305) are threadedly connected to the top of the mounting seal ring (301) via threaded pins (3051).

7. The drilling blowout preventer sand control device according to any one of claims 3 to 6, characterized in that, The bottom end of the sand-proof sealing ring (303) has a conical structure.

8. The drilling blowout preventer sand control device according to any one of claims 3 to 6, characterized in that, The sand-proof sealing ring (303) has threaded rods (5) on both sides of its top, and the cover (6) has a threaded pin hole at its top for inserting the threaded rods (5). The threaded rods (5) are locked to the sand-proof sealing ring (303) and the cover (6) by nuts (501).

9. The drilling blowout preventer sand control device according to any one of claims 1 to 6, characterized in that, The cover (6) includes a fastening ring (603) fitted on the outside of the protective ring (2) and a protective cover (602) on the top of the fastening ring (603). The fastening ring (603) has at least two fastening pins (601) on its outside, and the fastening pins (601) are used to lock the protective cover (602).

10. A blowout preventer, characterized in that, Includes the drilling blowout preventer sand control device as described in any one of claims 1 to 9.

Images