Electric control type underground exhaust valve

Abstract

The utility model discloses an electric control type underground exhaust valve which comprises a lower connector, an exhaust connector, a middle connector, an electric control connector and an upper connector, the exhaust connector is in threaded connection with the outer surface of the upper portion of the lower connector, and the middle connector is in threaded connection with the interior of the upper portion of the exhaust connector. An electric control connector is in threaded connection with the outer surface of the upper portion of the middle connector, an upper connector is in threaded connection with the interior of the upper portion of the electric control connector, a self-balancing device and a sliding structure are arranged in the exhaust connector, the self-balancing device is arranged on one side of the sliding structure, and the self-balancing device is composed of a balancing valve, a balancing valve spring and a balancing valve pressing cap. The self-balancing exhaust valve is electrically driven, underground pressure does not need to be considered, the self-balancing exhaust valve can be put into a deeper wellhead, a self-balancing function is added, the pressure is balanced firstly and then the valve plate is opened during action, and meanwhile, electric control is adopted, so that opening and closing are quicker, operation safety is improved, operation cost is reduced, and the risk of failure of the exhaust valve is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production equipment, in particular to an electric controlled downhole exhaust valve. Background Art

[0002] As oil and gas exploration and development areas move deeper, conventional exhaust valves are controlled by long-distance hydraulic pipelines. The opening and closing response time of the exhaust valve has a certain lag, and the exhaust valve is limited in depth, so it is difficult to meet ultra-deep installation requirements. Hydraulic oil is prone to leakage, and its own compressibility will cause pipeline deformation after a long time. At the same time, the hydraulic operation procedure is relatively complicated. When the environment changes too much, it is not easy to maintain the stability of the load movement speed. Hydraulic transmission is not suitable for long-distance control and transmission, which limits the scope of downhole exhaust valves. The response speed of hydraulic control is slow, which is not conducive to achieving efficient control.

[0003] Therefore, in order to solve the above problems, an electrically controlled downhole exhaust valve is proposed. Utility Model Content

[0004] The utility model aims to provide an electrically controlled downhole exhaust valve, comprising a lower joint, an exhaust joint, an intermediate joint, an electrically controlled joint and an upper joint, wherein the upper outer surface of the lower joint is threadedly connected to the exhaust joint, the upper inner surface of the exhaust joint is threadedly connected to the intermediate joint, the upper outer surface of the intermediate joint is threadedly connected to the electrically controlled joint, the upper inner surface of the electrically controlled joint is threadedly connected to the upper joint, a self-balancing device and a sliding structure are arranged inside the exhaust joint, the self-balancing device is arranged on one side of the sliding structure, the self-balancing device is composed of a balancing valve, a balancing valve spring and a balancing valve pressure cap, a balancing valve spring is arranged inside the balancing valve, a balancing valve pressure cap is arranged on one side of the balancing valve, the sliding structure is composed of a valve plate, a connecting push rod, a sliding pin and a sliding push rod, the connecting push rod and the sliding push rod are mutually connected by a sliding pin, and the lower part of the sliding push rod is threadedly connected to the valve plate;

[0005] A piston rod is slidably connected inside the middle joint, a center tube is slidably connected inside the electric control joint, a center tube is threadedly connected to the top of the piston rod, a return spring is sleeved on the outer surface of the center tube, a magnetic ring is fixed on the outer surface of the center tube, an upper electromagnetic module and a lower electromagnetic module are respectively arranged in the holes opened at the upper and lower ends of the electric control joint, and the upper electromagnetic module is fixed in the hole at the upper end of the electric control joint by a positioning block.

[0006] Compared with the prior art, the beneficial effects of the utility model are as follows: since the utility model is electrically driven, there is no need to consider the downhole pressure, and it can be lowered into a deeper wellhead. It has an added self-balancing function, and when in action, it first balances the pressure and then opens the valve plate. At the same time, it adopts electric control, which makes opening and closing faster, improves operational safety, reduces operational costs, and greatly reduces the risk of exhaust valve failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of the utility model;

[0008] Figure 2 It is an enlarged view of the internal structure of the intermediate joint and the electric control joint of the utility model;

[0009] Figure 3 It is an enlarged view of the internal structure of the exhaust joint of the utility model.

[0010] The reference numerals and names in the figures are as follows:

[0011] 1. Lower joint; 2. Exhaust joint; 3. Middle joint; 4. Electric control joint; 5. Upper joint; 6. Valve plate; 7. Connecting push rod; 8. Balance valve; 9. Balance valve spring; 10. Balance valve pressure cap; 11. Piston rod; 12. Center tube; 13. Reset spring; 14. Lower magnet module; 15. Magnetic ring spacer; 16. Magnet coil; 17. Magnet wire frame; 18. Magnet wire core; 19. Upper magnet module; 20. Magnetic ring; 21. Sliding pin; 22. Positioning block; 23. Connecting line; 24. Sliding push rod; 25. Sealing ring 1; 26. Sealing ring 2. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] As attached Figure 1-3As shown, the utility model provides an electrically controlled downhole exhaust valve, comprising a lower joint 1, an exhaust joint 2, an intermediate joint 3, an electrically controlled joint 4 and an upper joint 5, wherein the upper outer surface of the lower joint 1 is threadedly connected to the exhaust joint 2, the upper inner surface of the exhaust joint 2 is threadedly connected to the intermediate joint 3, the upper outer surface of the intermediate joint 3 is threadedly connected to the electrically controlled joint 4, the upper inner surface of the electrically controlled joint 4 is threadedly connected to the upper joint 5, the exhaust joint 2 is internally provided with a self-balancing device and a sliding structure, the self-balancing device is arranged on one side of the sliding structure, the self-balancing device is composed of a balancing valve 8, a balancing valve spring 9 and a balancing valve pressure cap 10, the balancing valve 8 is internally provided with a balancing valve spring 9, the balancing valve 8 is provided with a balancing valve pressure cap 10 on one side, the sliding structure is composed of a valve plate 6, a connecting push rod 7, a sliding pin 21 and a sliding push rod 24, the connecting push rod 7 and the sliding push rod 24 are mutually connected by the sliding pin 21, and the lower part of the sliding push rod 24 is threadedly connected to the valve plate 6;

[0014] The intermediate joint 3 is slidably connected to a piston rod 11, the electric control joint 4 is slidably connected to a center tube 12, the piston rod 11 is internally threadedly connected to the center tube 12, the outer surface of the center tube 12 is sleeved with a return spring 13, the outer surface of the center tube 12 is fixed with a magnetic ring 20, the upper electromagnetic module 19 and the lower electromagnetic module 14 are respectively arranged in the holes opened at the upper and lower ends of the electric control joint 4, and the upper electromagnetic module 19 is fixed in the hole at the upper end of the electric control joint 4 by a positioning block 22.

[0015] Specifically, a reserved connector for arranging a cable is provided on the upper surface of the upper connector 5 .

[0016] Specifically, the upper end of the connecting push rod 7 is threadedly connected to the lower end of the piston rod 11.

[0017] Specifically, the upper electromagnetic module 19 and the lower electromagnetic module 14 are both composed of a magnet shell, a coil spacer 15, a magnet coil 16, a magnet wire frame 17 and a magnet core 18. The magnet shell is provided with a magnet wire frame 17, the magnet coil 16 is provided outside the magnet wire frame 17, the coil spacer 15 is provided outside the magnet coil 16, and the magnet core 18 is provided inside the magnet wire frame 17.

[0018] Specifically, a connection line 23 is provided inside the central tube 12 , one end of the connection line 23 is connected to the upper connector 5 , and the other end of the connection line 23 is connected to the upper electromagnetic module 19 and the lower electromagnetic module 14 , respectively.

[0019] Specifically, a sealing ring 1 25 is provided at the connection between the lower joint 1 and the exhaust joint 2 , and a sealing ring 26 is provided between the inner hole of the middle joint 3 and the outer wall of the piston rod 11 .

[0020] Specifically, the lower joint 1, the exhaust joint 2, the middle joint 3, the electric control joint 4 and the upper joint 5 are all made of INCONEL 718 nickel-based alloy.

[0021] Specifically, the surface of the piston rod 11 is sprayed with tungsten carbide.

[0022] Specifically, the threads of the lower joint 1, the exhaust joint 2, the middle joint 3, the electric control joint 4 and the upper joint 5 are all carbonitrided to improve the reliability of the exhaust valve's multiple switching operations and prevent leakage.

[0023] Specifically, the upper end of the upper electromagnetic module 19 and the upper end of the magnetic ring 20 are magnetic poles that repel each other, and the lower end of the lower electromagnetic module 14 and the lower end of the magnetic ring 20 are magnetic poles that attract each other.

[0024] Specifically, the upper part of the reset spring 13 abuts against the lower part of the magnetic ring 20, and the lower part of the reset spring 13 abuts against the lower part of the middle joint 3. The reset spring 13 is used to achieve the purpose of resetting the downhole exhaust valve upward after losing the electromagnetic force.

[0025] Working principle:

[0026] Step 1: Install the electrically controlled downhole exhaust valve on the tail of the packer;

[0027] Step 2: After the cable is connected to the exhaust valve and placed in the wellhead together with the packer, when the exhaust valve needs to be operated, the cable is powered from the ground and the power is transmitted to the connection line 23 inside the downhole exhaust valve, which transmits the power to the upper electromagnetic module 19 and the lower electromagnetic module 14;

[0028] Step 3: The upper electromagnetic module 19 generates a repulsive force to push the magnetic ring 20, and the lower electromagnetic module 14 generates a suction force to suck the magnetic ring 20 downward, thereby driving the center tube 12 to move downward and squeezing the reset spring 13. The center tube 12 moves downward to drive the piston rod 11 downward, and the piston rod 11 drives the connecting push rod 7 downward. When the inclined surface of the connecting push rod 7 contacts the balancing valve 8, the balancing valve 8 will be pushed outward to open the balancing channel under the action of the thrust;

[0029] Step 4: After the pressures in the upper and lower annuli are balanced, the connecting push rod 7 continues to push the sliding push rod 24 until the valve plate 6 is fully opened. At this time, the exhaust valve is in a fully open state. Conversely, when the exhaust valve needs to be closed, the ground equipment cuts off the power supply, and the reset spring 13 drives the center pipe 12 to move upward. When the arc surface on the valve plate 6 contacts the bevel on the inner wall of the exhaust joint 2, a seal is formed, and the exhaust valve is in a fully closed state.

[0030] Step 4: Repeat steps 2-4 when you need to work again.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An electrically controlled downhole exhaust valve, comprising a lower joint (1), an exhaust joint (2), an intermediate joint (3), an electric control joint (4) and an upper joint (5), wherein the upper outer surface of the lower joint (1) is threadedly connected to the exhaust joint (2), the upper inner surface of the exhaust joint (2) is threadedly connected to the intermediate joint (3), the upper outer surface of the intermediate joint (3) is threadedly connected to the electric control joint (4), and the upper inner surface of the electric control joint (4) is threadedly connected to the upper joint (5), characterized in that: The exhaust joint (2) is provided with a self-balancing device and a sliding structure inside. The self-balancing device is provided on one side of the sliding structure. The self-balancing device is composed of a balancing valve (8), a balancing valve spring (9) and a balancing valve pressure cap (10). The balancing valve (8) is provided with a balancing valve spring (9). One side of the balancing valve (8) is provided with a balancing valve pressure cap (10). The sliding structure is composed of a valve plate (6), a connecting push rod (7), a sliding pin (21) and a sliding push rod (24). The connecting push rod (7) and the sliding push rod (24) are connected to each other through the sliding pin (21). The bottom of the sliding push rod (24) is threadedly connected to the valve plate (6). The intermediate joint (3) is slidably connected to a piston rod (11) inside, the electric control joint (4) is slidably connected to a center tube (12) inside, the piston rod (11) is internally threadedly connected to the center tube (12), the outer surface of the center tube (12) is sleeved with a return spring (13), the outer surface of the center tube (12) is fixed with a magnetic ring (20), the upper electromagnetic module (19) and the lower electromagnetic module (14) are respectively arranged in the holes opened at the upper and lower ends of the electric control joint (4), and the upper electromagnetic module (19) is fixed in the hole at the upper end of the electric control joint (4) by a positioning block (22).

2. The electrically controlled downhole exhaust valve according to claim 1, characterized in that: The upper surface of the upper joint (5) is provided with a reserved joint for arranging a cable.

3. The electrically controlled downhole exhaust valve according to claim 1, characterized in that: The upper end of the connecting push rod (7) is threadedly connected to the lower end of the piston rod (11).

4. The electrically controlled downhole exhaust valve according to claim 1, characterized in that: The upper electromagnetic module (19) and the lower electromagnetic module (14) are both composed of a magnet housing, a coil spacer (15), a magnet coil (16), a magnet wire frame (17) and a magnet core (18); the magnet housing is provided with a magnet wire frame (17), the magnet coil (16) is provided outside the magnet wire frame (17), the magnet coil (16) is provided outside the magnet coil (16), and the magnet core (18) is provided inside the magnet wire frame (17).

5. The electrically controlled downhole exhaust valve according to claim 1, characterized in that: A connecting line (23) is provided inside the central tube (12), one end of the connecting line (23) is connected to the upper joint (5), and the other end of the connecting line (23) is respectively connected to the upper electromagnetic module (19) and the lower electromagnetic module (14).

6. The electrically controlled downhole exhaust valve according to claim 1, characterized in that: A sealing ring 1 (25) is provided at the connection between the lower joint (1) and the exhaust joint (2), and a sealing ring 2 (26) is provided between the inner hole of the middle joint (3) and the outer wall of the piston rod (11).

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