Self-locking mechanism for blowout preventer valve element

Abstract

The invention relates to the technical field of well drilling, and discloses a self-locking mechanism for a blowout preventer valve element, the self-locking mechanism comprises a blowout preventer body, blowout preventer end covers are movably mounted at the top and the bottom of the blowout preventer body, rotating bolts are in threaded connection with the top and the bottom of the blowout preventer body, and a display screen is arranged on the outer surface of the blowout preventer body. Four indicator lamps are fixedly installed on the outer surface of the blowout preventer body, a valve body is fixedly installed on the outer surface of the blowout preventer body, and a connecting pipe is fixedly installed on the top of the valve body. According to the self-locking mechanism for the blowout preventer valve element, when blowout occurs at a wellhead, the driving motor can be started to drive the rotating rod to rotate, and then the rotating rod is matched with the connecting block to drive the valve element body to rotate, so that the sealing effect or the flow adjusting effect can be achieved, the indicating lamp is an AD16-22D indicating lamp, and the self-locking mechanism is long in service life, low in energy consumption, light in weight and convenient to use. Brightness is high and reliability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling, and particularly to a self-locking mechanism for a blowout preventer spool valve. Background Art

[0002] A blowout preventer is an essential safety protection measure during the drilling operation. When a blowout accident occurs at the wellhead, the blowout preventer can quickly seal the wellhead. When the pressure in the well drops to a safe pressure, the blowout preventer will open the wellhead again. The existing blowout preventers in the art are mainly of two types: gate type and ring type. Among them, the gate type blowout preventer includes two gate plates (i.e., the spool valve body) that open and close along a direction perpendicular to the wellbore. Seals made of elastic materials are provided at the front ends of the two gate plates. After the two gate plates are closed, the seals deform to achieve the sealing of the wellhead.

[0003] However, after some traditional gate plates in the existing market are used for a long time, there is a risk of seal failure, which will cause high-pressure fluid in the well to enter the gap between the two gate plates. Under the action of the high-pressure fluid, the gate plates will further separate, resulting in the complete failure of the gate plates. Moreover, in the existing technology, a manual mechanical device has to be used to lock the gate plates. However, the manual locking device relies on manual operation, and before the operator performs the unlocking operation, it is necessary to judge the pressure situation in the well through a pressure sensor. If the pressure sensor fails or the operator makes a misjudgment at this time, it is very likely that the operator will open the gate plates when the pressure in the well has not dropped to the safe range, resulting in serious production accidents. For this reason, we have proposed a self-locking mechanism for a blowout preventer spool valve. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the existing technology, the present invention provides a self-locking mechanism for a blowout preventer spool valve with self-locking function.

[0006] (2) Technical Solutions

[0007] To achieve the above more stable and safe purpose, the present invention provides the following technical solutions: A self-locking mechanism for a blowout preventer spool, including a blowout preventer body, with blowout preventer end caps movably installed at both the top and bottom of the blowout preventer body. Rotating bolts are threadedly connected to both the top and bottom of the blowout preventer body. A display screen is provided on the outer surface of the blowout preventer body. Four indicator lights are fixedly installed on the outer surface of the blowout preventer body. A valve body is fixedly installed on the outer surface of the blowout preventer body. A connecting pipe is fixedly installed at the top of the valve body. A functional structure is fixedly installed on the outer surface of the valve body. A control box is fixedly installed at the top of the connecting pipe. A fixing plate is fixedly installed at the top of the control box. A control panel is fixedly installed on the outer surface of the fixing plate. A threaded rod is threadedly connected to the right outer surface of the control box. Two sliding rods are movably installed on the right outer surface of the control box;

[0008] The functional structure includes a connecting flange located on the outer surface of the valve body. A driving motor is fixedly installed on the inner top wall of the control box. An activity plate is movably installed on the outer surface of the threaded rod inside the control box. A rotating rod is fixedly installed at the bottom output shaft of the driving motor. A first gear is fixedly installed on the outer surface of the rotating rod. A connecting block is fixedly installed at the bottom of the rotating rod. A spool body is movably installed inside the valve body. Through openings are provided on the outer surface of the spool body. A functional plate is fixedly installed on the inner bottom wall of the control box. A limiting rod is movably installed on the outer surface of the functional plate. A limiting block is fixedly installed on the right outer surface of the limiting rod. A plugging block is fixedly installed on the left outer surface of the activity plate. A second gear is fixedly installed on the left outer surface of the limiting rod.

[0009] Preferably, the outer surfaces of the first gear and the second gear are meshed with each other. The left outer surfaces of the two sliding rods are fixedly connected to the right outer surface of the activity plate.

[0010] Preferably, two activity openings are provided on the right outer surface of the control box. The inner walls of the two activity openings are respectively adapted to the outer surfaces of the sliding rods.

[0011] Preferably, a hexagonal groove is provided on the outer surface of the limiting block. The outer surface of the plugging block is adapted to the inner wall of the hexagonal groove.

[0012] Preferably, a number of fixing holes are provided on the outer surfaces of the two connecting flanges. The two blowout preventer end caps are respectively connected to the blowout preventer body through rotating bolts.

[0013] Preferably, a single-chip microcomputer is provided on the left inner wall of the control box. The single-chip microcomputer is electrically connected to the driving motor.

[0014] Preferably, the bottom of the connecting block is fixedly connected to the top of the valve core body, and the connecting pipe and the valve body are integrated.

[0015] Preferably, function ports are provided on the outer surface of the function board, and the outer surface of the limiting rod is connected to the function ports through bearings.

[0016] Preferably, the limiting block and the inserting block are on the same horizontal line.

[0017] (III) Beneficial Effects

[0018] Compared with the prior art, the present invention provides a self-locking mechanism for a blowout preventer valve core, having the following beneficial effects:

[0019] 1. For the self-locking mechanism of the blowout preventer valve core, when the pressure in the well gradually increases, the movable plate can be driven to move leftward by rotating the threaded rod. The slide rod is provided to limit the movable plate, so as to achieve a more stable effect when the movable plate moves. By moving the movable plate leftward, the inserting block can be inserted into the inner wall of the hexagonal groove, so as to limit the limiting rod and the second gear. The second gear and the first gear are meshed, so as to limit the first gear and the rotating rod, thus avoiding abnormal movement of the valve core body caused by operator error or equipment failure. Then, when the pressure in the well drops to a safe range, the drive motor drives the rotating rod to rotate in the reverse direction, and then drives the valve core body to rotate in the reverse direction through the connecting block, so as to open the through hole on the outer surface of the valve core body. Through the above several structures, the automatic locking between the valve core bodies is realized, and the automatic locking between the valve core body and the valve body is realized through the threaded rod, so that the valve core body and the housing form an integral body, improving the pressure resistance of the valve core body. Even if a pressure loss occurs, the valve core body can still maintain the closed state, improving the reliability of the blowout preventer, and being completely triggered by the pressure in the well, effectively avoiding abnormal opening of the valve core body caused by operator error or equipment failure, and further avoiding the danger of secondary blowout.

[0020] 2. For the self-locking mechanism of the blowout preventer valve core, when a blowout occurs at the wellhead, the drive motor can be started to drive the rotating rod to rotate, and then drive the valve core body to rotate through the connecting block, so as to achieve the effects of sealing or adjusting the flow rate. The indicator light is an AD16-22D indicator light, which has a long service life, low energy consumption, light weight, high brightness and good reliability. The display screen is a plasma display PDP screen, which has zero radiation, low energy consumption, small heat dissipation, is thin and light, and accurately restores images. Description of the Drawings

[0021] Figure 1Schematic structural diagram of a self-locking mechanism for a blowout preventer spool proposed by the present invention;

[0022] Figure 2 Front cross-sectional view of the structure of a self-locking mechanism for a blowout preventer spool proposed by the present invention;

[0023] Figure 3 Structural diagram of a self-locking mechanism for a blowout preventer spool proposed by the present invention Figure 2 Enlarged view at position A in;

[0024] Figure 4 Side view of the limit block of the structure of a self-locking mechanism for a blowout preventer spool proposed by the present invention.

[0025] In the figure: 1, blowout preventer body; 2, blowout preventer end cover; 3, rotating bolt; 4, display screen; 5, indicator light; 6, valve body; 7, connecting pipe; 8, functional structure; 801, connecting flange; 802, driving motor; 803, movable plate; 804, rotating rod; 805, first gear; 806, connecting block; 807, spool body; 808, through port; 809, functional plate; 810, limiting rod; 811, limit block; 812, inserting block; 813, second gear; 9, control box; 10, fixing plate; 11, control panel; 12, threaded rod; 13, sliding rod. Specific implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-4 , a self-locking mechanism for a blowout preventer spool, including a blowout preventer body 1, blowout preventer end covers 2 are movably installed at both the top and bottom of the blowout preventer body 1, rotating bolts 3 are threadedly connected to both the top and bottom of the blowout preventer body 1, a display screen 4 is provided on the outer surface of the blowout preventer body 1, four indicator lights 5 are fixedly installed on the outer surface of the blowout preventer body 1, a valve body 6 is fixedly installed on the outer surface of the blowout preventer body 1, a connecting pipe 7 is fixedly installed on the top of the valve body 6, a functional structure 8 is fixedly installed on the outer surface of the valve body 6, a control box 9 is fixedly installed on the top of the connecting pipe 7, a fixing plate 10 is fixedly installed on the top of the control box 9, a control panel 11 is fixedly installed on the outer surface of the fixing plate 10, a threaded rod 12 is threadedly connected to the right outer surface of the control box 9, and two sliding rods 13 are movably installed on the right outer surface of the control box 9.

[0028] The functional structure 8 includes a connecting flange 801 located on the outer surface of the valve body 6. A driving motor 802 is fixedly installed on the inner top wall of the control box 9. A movable plate 803 is movably installed on the outer surface of the threaded rod 12 inside the control box 9. A rotating rod 804 is fixedly installed at the bottom output shaft of the driving motor 802. A first gear 805 is fixedly installed on the outer surface of the rotating rod 804. A connecting block 806 is fixedly installed at the bottom of the rotating rod 804. A valve core body 807 is movably installed inside the valve body 6. A through port 808 is formed on the outer surface of the valve core body 807. A functional plate 809 is fixedly installed on the inner bottom wall of the control box 9. A limiting rod 810 is movably installed on the outer surface of the functional plate 809. A limiting block 811 is fixedly installed on the right outer surface of the limiting rod 810. A plugging block 812 is fixedly installed on the left outer surface of the movable plate 803. A second gear 813 is fixedly installed on the left outer surface of the limiting rod 810.

[0029] In Figure 2 , the limiting block 811 and the plugging block 812 are both on the same horizontal line, so that the movable plugging block 812 can be fixed by fitting with the inner wall of the hexagonal groove on the outer surface of the limiting block 811, and the effect of limiting and fixing the limiting block 811 can be achieved.

[0030] In Figure 2 , the bottom of the connecting block 806 at the bottom of the rotating rod 804 is fixedly connected to the top of the valve core body 807, so that the rotation of the rotating rod 804 can drive the valve core body 807 to rotate synchronously, achieving the effect of adjusting the valve core body 807.

[0031] In Figure 2 , two movable openings are formed on the right outer surface of the control box 9, and the inner walls are respectively adapted to the outer surface of the sliding rod 13, so that the sliding rod 13 can be limited, making the sliding rod 13 more stable during movement.

[0032] In Figure 2 , the outer surface of the first gear 805 is meshed with the outer surface of the second gear 813, so that the second gear 813 can limit the first gear 805.

[0033] In Figure 2 , the left outer surfaces of the sliding rods 13 are fixedly connected to the right outer surface of the movable plate 803, so that the movable plate 803 can be limited.

[0034] During use, for the self-locking mechanism of the blowout preventer spool, when the well pressure gradually increases, the movable plate 803 can be driven to move leftward by rotating the threaded rod 12. The slide rod 13 is provided to limit the movement of the movable plate 803, thereby achieving a more stable effect when the movable plate 803 moves. By moving the movable plate 803 leftward, the insertion block 812 can be inserted into the inner wall of the hexagonal groove, thereby achieving the limitation of the limiting rod 810 and the second gear 813. The second gear 813 meshes with the first gear 805, thus achieving the effect of limiting the first gear 805 and the rotating rod 804, and further avoiding abnormal movement of the spool body 807 caused by operator error or equipment failure. Then, when the well pressure drops to a safe range, the drive motor 802 drives the rotating rod 804 to rotate in the opposite direction, and then cooperates with the connecting block 806 to drive the spool body 807 to rotate in the opposite direction, thereby opening the through port 808 on the outer surface of the spool body 807. Through the above several structures, automatic locking between the spool bodies 807 is achieved, and automatic locking between the spool body 807 and the valve body 6 is achieved through the threaded rod 12, making the spool body 807 form an integral body with the housing, improving the pressure resistance of the spool body 807. Even in case of pressure loss, the spool body 807 can remain in the closed state, improving the reliability of the blowout preventer. And it is completely triggered by the well pressure, effectively avoiding abnormal opening of the spool body 807 caused by operator error or equipment failure, and further avoiding the danger of secondary blowout.

[0035] In summary, when a blowout occurs at the wellhead, the drive motor 802 can be started to drive the rotating rod 804 to rotate, and then cooperate with the connecting block 806 to drive the spool body 807 to rotate, thereby achieving the effect of sealing or adjusting the flow rate. The indicator light 5 is an indicator light of AD16-22D. This device has a long service life, low energy consumption, light weight, high brightness, and good reliability. The display screen 4 is a display screen of a plasma display PDP. This display screen 4 has zero radiation, low energy consumption, small heat dissipation, is thin and light, and accurately restores images.

[0036] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking mechanism for a blowout preventer spool, including a blowout preventer body (1). Characterized in that; Blowout preventer end caps (2) are movably installed at both the top and bottom of the blowout preventer body (1). Rotating bolts (3) are threadedly connected to both the top and bottom of the blowout preventer body (1). A display screen (4) is provided on the outer surface of the blowout preventer body (1). Four indicator lights (5) are fixedly installed on the outer surface of the blowout preventer body (1). A valve body (6) is fixedly installed on the outer surface of the blowout preventer body (1). A connecting pipe (7) is fixedly installed at the top of the valve body (6). A functional structure (8) is fixedly installed on the outer surface of the valve body (6). A control box (9) is fixedly installed at the top of the connecting pipe (7). A fixing plate (10) is fixedly installed at the top of the control box (9). A control panel (11) is fixedly installed on the outer surface of the fixing plate (10). A threaded rod (12) is threadedly connected to the right outer surface of the control box (9). Two sliding rods (13) are movably installed on the right outer surface of the control box (9): The functional structure (8) includes a connecting flange (801) located on the outer surface of the valve body (6). A driving motor (802) is fixedly installed on the inner top wall of the control box (9). A movable plate (803) is movably installed on the outer surface of the threaded rod (12) inside the control box (9). A rotating rod (804) is fixedly installed at the bottom output shaft of the driving motor (802). A first gear (805) is fixedly installed on the outer surface of the rotating rod (804). A connecting block (806) is fixedly installed at the bottom of the rotating rod (804). A spool body (807) is movably installed inside the valve body (6). A through hole (808) is opened on the outer surface of the spool body (807). A functional plate (809) is fixedly installed on the inner bottom wall of the control box (9). A limiting rod (810) is movably installed on the outer surface of the functional plate (809). A limiting block (811) is fixedly installed on the right outer surface of the limiting rod (810). A plugging block (812) is fixedly installed on the left outer surface of the movable plate (803). A second gear (813) is fixedly installed on the left outer surface of the limiting rod (810).

2. A self-locking mechanism for a blowout preventer spool according to claim 1, Characterized in that: The outer surfaces of the first gear (805) and the second gear (813) are meshed with each other. The left outer surfaces of the two sliding rods (13) are fixedly connected to the right outer surface of the movable plate (803).

3. A self-locking mechanism for a blowout preventer spool according to claim 1, Characterized in that: Two movable openings are opened on the right outer surface of the control box (9). The inner walls of the two movable openings are respectively adapted to the outer surfaces of the sliding rods (13).

4. A self-locking mechanism for a blowout preventer spool according to claim 1, Characterized in that: The outer surface of the limit block (811) is provided with a hexagonal groove, and the outer surface of the plug block (812) is adapted to the inner wall of the hexagonal groove.

5. A self-locking mechanism for a blowout preventer valve core according to claim 1, characterized in that: A number of fixing holes are provided on the outer surfaces of the two connecting flanges (801), and the two blowout preventer end covers (2) are respectively connected to the blowout preventer body (1) by rotating bolts (3).

6. A self-locking mechanism for a blowout preventer valve core according to claim 1, characterized in that: A single-chip microcomputer is provided on the left inner wall of the control box (9), and the single-chip microcomputer is electrically connected to the driving motor (802).

7. A self-locking mechanism for a blowout preventer valve core according to claim 1, characterized in that: The bottom of the connecting block (806) is fixedly connected to the top of the valve core body (807), and the connecting pipe (7) and the valve body (6) are integrated.

8. A self-locking mechanism for a blowout preventer valve core according to claim 1, characterized in that: Function ports are provided on the outer surface of the function board (809), and the outer surface of the limit rod (810) is connected to the function ports through bearings.

9. A self-locking mechanism for a blowout preventer valve core according to claim 1, characterized in that: The limit block (811) and the plug block (812) are on the same horizontal line.

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