Multi-functional Shearing Ball Valve

Abstract

The present invention relates to a multi-functional shear ball valve. The ball valve is rotatably arranged between the upper ball seat and the lower ball seat, and through holes are formed in the opposite sides of the ball valve in a penetrating manner; the upper piston is sleeved outside the upper ball seat and can reciprocate along the length direction of the upper ball seat on the upper ball seat; the lower piston is sleeved outside the lower ball seat and can reciprocate along the length direction of the lower ball seat on the lower ball seat; the upper piston is connected to the lower piston, and a clearance ring is arranged between the two; the driving assembly is arranged in the clearance ring. When the upper piston and the lower piston move reciprocally together, the driving assembly drives the ball valve to rotate clockwise or counterclockwise; after the ball valve rotates counterclockwise, the direction of the through hole on the ball valve is the same as the oil path direction to realize the open state of the ball valve. After the ball valve rotates clockwise, the direction of the through hole on the ball valve is perpendicular to the oil path direction to realize the closed state of the ball valve; when the ball valve is closed from the open state, the ball valve shears the cable or oil pipe passing through the through hole on the ball valve.

Description

Technical Field

[0001] The present invention relates to the technical field of oil extraction, and specifically relates to a multi-functional shear ball valve. Background Art

[0002] In the deepwater completion technology of offshore oil, the upper completion string is lowered by using a landing string to complete operations such as downhole valve opening and closing, and plug placement. The landing string includes tools such as an underwater test tree, a retainer valve, and a blowout preventer valve. The blowout preventer valve is generally designed and configured at the upper end of the landing string and has the function of emergency well shut-off. However, for shallow water landing strings, due to limitations of on-site operating conditions, tools such as an underwater tree and a retainer valve cannot be configured in the landing string. Traditional blowout preventer valves have a single function and insufficient safety guarantee for emergencies, and cannot meet the requirements of shallow water underwater completion. Summary of the Invention

[0003] In view of the above problems, the object of the present invention is to provide a multi-functional shear ball valve, which has multiple functions such as opening and closing the pipe string diameter, bearing the upper and lower pressure differences, shearing coiled tubing and cables, and pumping through.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The multi-functional shear ball valve of the present invention includes an upper ball seat, a lower ball seat, a ball valve, an upper piston, a lower piston, and a driving assembly; the ball valve is rotatably arranged between the upper ball seat and the lower ball seat, and through holes are provided in the opposite sides of the ball valve; the upper piston is sleeved outside the upper ball seat and can reciprocate along the length direction of the upper ball seat on the upper ball seat; the lower piston is sleeved outside the lower ball seat and can reciprocate along the length direction of the lower ball seat on the lower ball seat; the upper piston is connected to the lower piston, and an air avoidance ring is arranged between the two; the driving assembly is arranged in the air avoidance ring, and when the upper piston and the lower piston move reciprocally together, the driving assembly drives the ball valve to rotate clockwise or counterclockwise; when the ball valve rotates counterclockwise, the direction of the through hole on the ball valve is the same as the oil path direction to achieve the open state of the ball valve, and when the ball valve rotates clockwise, the direction of the through hole on the ball valve is perpendicular to the direction of the oil path to achieve the closed state of the ball valve; when the ball valve is closed from the open state, the ball valve shears the cable or tubing passing through the through hole on the ball valve.

[0006] Preferably, for the multi-functional shear ball valve, the driving assembly includes a fixing ring and a torsion lug; notch grooves are provided at both the top and bottom of the ball valve; the fixing ring is arranged in the air avoidance ring between the upper piston and the lower piston, and the top and bottom of the inner wall of the fixing ring are respectively fixedly connected with the torsion lug; the torsion lug extends into the corresponding notch groove.

[0007] For the multifunctional shear ball valve described above, preferably, the lower part of the torque lug is of a cylindrical structure; the outer circle of the bottom surface of the cylindrical structure is tangent to the two side walls of the notch groove; in the closed state of the ball valve, the notch groove is offset by 45° from the center of the ball valve.

[0008] For the multifunctional shear ball valve described above, preferably, it further includes an upper spring and a lower spring. A plurality of the upper springs are respectively arranged at the end of the upper ball seat away from the ball valve, and a plurality of the lower springs are respectively arranged at the end of the lower ball seat away from the ball valve.

[0009] For the multifunctional shear ball valve described above, preferably, it further includes a lower spring seat. The lower spring seat is arranged at the rear end of the lower ball seat and sleeved inside the lower piston; the lower spring is located between the lower ball seat and the lower spring seat.

[0010] For the multifunctional shear ball valve described above, preferably, a first drain port is arranged on the upper piston; a second drain port is arranged on the lower piston; the first drain port is located at the front end of the clearance ring, and the second drain port is located at the rear end of the clearance ring.

[0011] For the multifunctional shear ball valve described above, preferably, a notch is arranged on the ball valve on the side perpendicular to the through hole. When the ball valve is closed and cuts a cable or a tubing string, the notch is clamped onto the cable or the tubing string to straighten the cable or the tubing string.

[0012] For the multifunctional shear ball valve described above, preferably, the notch is in the shape of a flared mouth.

[0013] For the multifunctional shear ball valve described above, preferably, it further includes a connecting ring. The upper piston and the lower piston are connected by the connecting ring.

[0014] Due to the above technical solutions adopted by the present invention, it has the following advantages:

[0015] Through the multifunctional design of the ball valve, the ball valve simultaneously has functions such as opening, closing, pressure bearing, shearing, and pumping through, etc. It can be used with multiple functions by one tool, meeting different process design requirements, improving the applicability of the tool, reducing the procurement cost of tools with different functions at the same time, and ensuring the normal progress of operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0017] Figure 1 is a schematic cross-sectional structure view of the present invention;

[0018] Figure 2 is Figure 1 A sectional view taken along the A-A direction;

[0019] Figure 3 is a schematic structural diagram of the ball valve of the present invention, which shows the structure of the notch groove;

[0020] Figure 4 is a schematic structural diagram of the ball valve of the present invention, which shows the structure of the notch;

[0021] Figure 5 is a schematic structural diagram of the torsion lug of the present invention;

[0022] Figure 6 is a schematic structural diagram of the fixing ring of the present invention;

[0023] Figure 7 is a schematic structural diagram of the lower ball seat of the present invention;

[0024] Figure 8 is a schematic structural diagram of the upper ball seat of the present invention;

[0025] Figure 9 is a schematic structural diagram of the lower piston of the present invention;

[0026] Figure 10 is a schematic structural diagram of the upper piston of the present invention;

[0027] Figure 11 is a schematic structural diagram of the lower spring seat of the present invention;

[0028] Figure 12 is a schematic structural diagram of the present invention in the pump-on state.

[0029] The reference signs in the drawings are as follows:

[0030] 1 - upper ball seat; 2 - lower ball seat; 3 - ball valve; 301 - through hole; 302 - notch groove; 303 - notch; 4 - upper piston; 5 - lower piston; 6 - fixing ring; 7 - torsion lug; 8 - upper spring; 9 - lower spring; 10 - lower spring seat; 11 - first drain port; 12 - second drain port; 13 - connecting ring; 14 - screw. Detailed Description of the Invention

[0031] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0032] The present invention provides a multi-functional shear ball valve. Through the multi-functional design of the ball valve, the ball valve has functions such as opening, closing, pressure-bearing, shearing, and pumping at the same time. It can be used in multiple positions with one tool, meeting different process design requirements, improving the applicability of the tool, reducing the procurement cost of tools with different functions, and ensuring the normal progress of operations.

[0033] As Figure 1 shown, the multi-functional shear ball valve provided by the present invention includes an upper ball seat 1, a lower ball seat 2, a ball valve 3, an upper piston 4, a lower piston 5, and a driving assembly; the ball valve 3 is rotatably arranged between the upper ball seat 1 and the lower ball seat 2, and through holes 301 are formed in opposite sides of the ball valve 3 (see Figure 2 ); the upper piston 4 is sleeved outside the upper ball seat 1 and can reciprocate along the length direction of the upper ball seat 1 on the upper ball seat 1; the lower piston 5 is sleeved outside the lower ball seat 2 and can reciprocate along the length direction of the lower ball seat 2 on the lower ball seat 2; the upper piston 4 is connected to the lower piston 5, and an air avoidance ring is arranged between the two; the driving assembly is arranged in the air avoidance ring. When the upper piston 4 and the lower piston 5 move reciprocally together, the driving assembly drives the ball valve 3 to rotate clockwise or counterclockwise; when the ball valve 3 rotates counterclockwise, the direction of the through hole 301 on the ball valve 3 is the same as the oil path direction to achieve the open state of the ball valve 3. When the ball valve 3 rotates clockwise, the direction of the through hole 301 on the ball valve 3 is perpendicular to the direction of the oil path to achieve the closed state of the ball valve 3; when the ball valve 3 is closed from the open state, the ball valve 3 shears the cable or oil pipe (not shown in the figure) passing through the through hole on the ball valve 3.

[0034] In the above embodiment, preferably, the driving assembly includes a fixed ring 6 and a torsion lug 7; notches 302 are arranged at the top and bottom of the ball valve 3 (see Figure 3 ); the fixed ring 6 is arranged in the air avoidance ring between the upper piston 4 and the lower piston 5, and torsion lugs 7 are respectively fixedly connected to the top and bottom of the inner wall of the fixed ring 6 (see Figure 5 ); the torsion lugs 7 extend into the corresponding notches 302.

[0035] In the above embodiment, preferably, as Figure 3 shown, the lower part of the torsion lug 7 is a cylindrical structure; the outer circle of the bottom surface of the cylindrical structure is tangent to the two side walls of the notch 302; in the closed state of the ball valve, the notch 302 is offset 45° from the center of the ball valve 3. Thus, it is more convenient for the ball valve 3 to rotate.

[0036] In the above embodiments, preferably, the present invention further includes an upper spring 8 and a lower spring 9. A plurality of upper springs 8 are respectively arranged at the end of the upper ball seat 1 away from the ball valve 3, and a plurality of lower springs 9 are respectively arranged at the end of the lower ball seat 2 away from the ball valve 3. Thereby, it can ensure that the two ends of the ball seat are in close contact with the ball valve during the operation of the ball valve, enhancing the sealing ability; and at the same time, it can ensure that the ball valve can still be effectively sealed after repeated opening and closing wear.

[0037] In the above embodiments, preferably, the present invention further includes a lower spring seat 10. The lower spring seat 10 is arranged at the rear end of the lower ball seat 2 and is sleeved inside the lower piston 5; the lower spring 9 is located between the lower ball seat 2 and the lower spring seat 10.

[0038] In the above embodiments, preferably, a first liquid discharge port 11 is arranged on the upper piston 4; a second liquid discharge port 12 is arranged on the lower piston 5; the first liquid discharge port 11 is located at the front end of the clearance ring, and the second liquid discharge port 12 is located at the rear end of the clearance ring. The first liquid discharge port 11 and the second liquid discharge port 12 are used to discharge the liquid entering the shear ball valve from the formation.

[0039] In the above embodiments, preferably, a notch 303 (see Figure 4 ) is arranged on the ball valve 3 on one side perpendicular to the through hole 301. When the ball valve 3 is closed and cuts the cable or tubing, the notch 303 is stuck on the cable or tubing to straighten the cable or tubing.

[0040] In the above embodiments, preferably, the notch 303 is in a flared shape.

[0041] In the above embodiments, preferably, the present invention further includes a connecting ring 13. The upper piston 4 and the lower piston 5 are connected by the connecting ring 13. Specifically, the connecting ring is sleeved at the connection part of the upper piston 4 and the lower piston 5, and is fixed at both ends by screws 14.

[0042] Among them, the structure of the torsion lug is as shown in Figure 5 ; the structure of the fixing ring is as shown in Figure 6 ; the structure of the lower ball seat is as shown in Figure 7 ; the structure of the upper ball seat is as shown in Figure 8 ; the structure of the lower piston is as shown in Figure 9 ; the structure of the upper piston is as shown in Figure 10 ; the structure of the lower spring seat is as shown in Figure 11 .

[0043] In addition, it should be noted that: as shown in Figure 12As shown, the ball valve 3 of the present invention has a sealing function after being closed and can withstand pressure; and due to the structural design of the springs at both ends of the ball valve, when the ball valve is sealed, pressure is applied to the upper end of the sealing surface, and the ball valve moves axially, compressing the lower spring to form a pump-through channel. Among them, the pump-through function is similar to that of a check valve, that is, when pumping liquid from front to back, the liquid can pass through, and when pumping liquid from back to front, it cannot pass through.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional shear ball valve, characterized in that, It includes an upper ball seat, a lower ball seat, a ball valve, an upper piston, a lower piston and a driving component; The ball valve is rotatably arranged between the upper ball seat and the lower ball seat, and through holes are arranged through the opposite sides of the ball valve; The upper piston is sleeved outside the upper ball seat and can reciprocate along the length direction of the upper ball seat on the upper ball seat; The lower piston is sleeved outside the lower ball seat and can reciprocate along the length direction of the lower ball seat on the lower ball seat; The upper piston is connected to the lower piston, and a clearance ring is arranged between the two; The driving component is arranged in the clearance ring. When the upper piston and the lower piston reciprocate together, the driving component drives the ball valve to rotate clockwise or counterclockwise; After the ball valve rotates counterclockwise, the direction of the through hole on the ball valve is the same as the oil path direction to realize the open state of the ball valve. After the ball valve rotates clockwise, the direction of the through hole on the ball valve is perpendicular to the direction of the oil path to realize the closed state of the ball valve; When the ball valve closes, the ball valve shears the cable or oil pipe passing through the through hole on the ball valve; Wherein, the driving component includes a fixed ring and a torsion lug; Notch grooves are arranged at the top and bottom of the ball valve; The fixed ring is arranged in the clearance ring between the upper piston and the lower piston, and the torsion lugs are respectively fixedly connected to the top and bottom of the inner wall of the fixed ring; The torsion lugs extend into the corresponding notch grooves; The lower part of the torsion lug is a cylindrical structure; the outer circle of the bottom surface of the cylindrical structure is tangent to the two side walls of the notch groove. In the closed state of the ball valve, the notch groove is offset 45° from the center of the ball valve.

2. The multifunctional shear ball valve according to claim 1, characterized in that, It also includes an upper spring and a lower spring. A plurality of the upper springs are respectively arranged at the end of the upper ball seat away from the ball valve, and a plurality of the lower springs are respectively arranged at the end of the lower ball seat away from the ball valve.

3. The multifunctional shear ball valve according to claim 2, characterized in that, It also includes a lower spring seat. The lower spring seat is arranged at the rear end of the lower ball seat and is sleeved inside the lower piston; The lower spring is located between the lower ball seat and the lower spring seat.

4. The multi-functional shear ball valve according to claim 1, characterized in that, A first liquid discharge port is arranged on the upper piston; a second liquid discharge port is arranged on the lower piston; The first liquid discharge port is located at the front end of the clearance ring, and the second liquid discharge port is located at the rear end of the clearance ring.

5. The multifunctional shear ball valve according to claim 1, characterized in that, A notch is arranged on the ball valve on the side perpendicular to the through hole. When the ball valve closes and shears the cable or oil pipe, the notch is stuck on the cable or oil pipe to straighten the cable or oil pipe.

6. The multifunctional shearing ball valve according to claim 5, wherein, The notch is in the shape of a flared mouth.

7. The multi-functional shear ball valve according to claim 1, characterized in that, It also includes a connecting ring. The upper piston and the lower piston are connected through the connecting ring.

Images