Anti-tripping and anti-leakage oil well pump standing valve

Abstract

An anti-tripping and anti-leakage oil well pump standing valve comprises a valve body 10, anti-leakage rings 11 are arranged in the valve body 10, anti-leakage balls 20 are installed in the valve body 10, the anti-leakage rings 11 and the anti-leakage balls 20 form an anti-leakage combination, the number of the anti-leakage rings 11 is 3-10, and the number of the anti-leakage balls 20 is 3-10. Enough safety redundancy is achieved, and the whole mechanism is simpler, more scientific and more reasonable.

Description

Technical Field

[0001] The invention discloses an anti-tripping and anti-leakage fixed valve for an oil well pump, belonging to the technical field of anti-tripping and anti-leakage fixed valves for oil well pumps. Background Art

[0002] The three-extraction oil production method (the oil production method that combines pumping units, sucker rods, and oil pumps) is the most widely used oil production method in oil fields. The oil pump is the core component of the three-extraction oil production and directly determines the efficiency of the three-extraction system. One of the most important factors that determine the pumping efficiency of the oil pump is the sealing ability and anti-tripping ability of the fixed valve. The anti-tripping and anti-leakage ability of the fixed valve of the oil pump directly determines the efficiency of the three-extraction system (the structure of the existing conventional fixed valve of the oil pump is shown in the attached figure). Figure 1 Its structural features are as follows: a valve seat 3 is installed in the fixed valve cover 1, and a lower joint 4 is installed at the lower end of the fixed valve cover 1. The end faces of the valve seat 3 are in contact with the sealing end faces of the fixed valve cover 1 and the lower joint 4 respectively, and the lower joint 4 presses the valve seat 3 tightly in the fixed valve cover 1).

[0003] The existing fixed valve technology has serious defects, mainly manifested in fixed valve leakage and fixed valve tripping, specifically: First, the leakage between the fixed valve cover 1 and the valve seat 3; Second, leakage between the valve seat 3 and the lower joint 4; Third, leakage between the valve ball 2 and the valve seat 3; Fourth, the thread between the fixed valve cover 1 and the lower joint 4 is disengaged (the disengagement is the loosening of the connecting thread between them). The main causes of leakage and tripping are as follows: Reason 1: The self-locking force is too small. Figure 1 As shown, the two sealing end faces of the valve seat 3 respectively form metal component end face seals with the end faces of the valve cover 1 and the lower joint 4 (the end faces have a finish and flatness of more than 0.8um). Because the sealing end faces are very smooth, the friction force is very small, and the self-locking force is very small. Reason 2: The vibration of the valve ball produces a knock-loose effect. Figure 1 As shown, during the operation of the fixed valve, the valve ball 2 will continuously bounce under the impact of the well fluid, and will continuously hit the fixed valve cover 1 and the valve seat 3 during the jumping process, generating a knocking vibration effect. The jumping and impact of the valve ball 2 is equivalent to continuously knocking on the connection to loosen it, and leakage will occur after the loosening.

[0004] Reason three: Two self-locking surfaces double the self-locking sealing ability. The best way to achieve thread self-locking is for the two threaded connectors to directly contact each other to achieve self-locking. Therefore, to achieve the best self-locking between the fixed valve cover 1 and the lower joint 4, their self-locking end faces must be in direct contact. Figure 1As shown, the valve seat 3 sandwiched between the fixed valve cover 1 and the lower joint 4 destroys this structure. The valve seat 3 forms two self-locking end faces with the fixed valve cover 1 and the lower joint 4 respectively. If any of these two self-locking end faces becomes loose, the fixed valve will leak.

[0005] Reason 4: The valve ball 2 and the valve seat 3 are sealed by the sealing surface. When the valve ball 2 and the valve seat 3 are damaged and worn by impact, leakage will occur directly. This leakage is bound to happen, but the existing technology is not good at dealing with this leakage, and the safety measures are seriously insufficient.

[0006] Reason 5: Looseness between the fixed valve cover 1 and valve seat 3, and between the valve seat 3 and lower joint 4, can cause the self-locking threads between the fixed valve cover 1 and lower joint 4 to fail, resulting in a tripped and scrapped screw. A tripped fixed valve not only directly causes the oil well pump to fail, but also creates a significant amount of debris in the well, requiring salvage operations to repair it. Failure to salvage the well can lead to the failure of the well, resulting in serious production and safety accidents.

[0007] As mentioned above, the current existing technology has leakage and tripping phenomena in fixed valves, which cannot achieve long-term stable operation. This drawback is seriously inconsistent with the overall goal of increasing the maintenance-free period of oil wells in oil fields. Therefore, anti-tripping and anti-leakage fixed valve technology for oil pumps has become a rigid demand.

[0008] The purpose of the present invention is to solve the problems and shortcomings of existing products in the prior art, and to propose an anti-tripping and anti-leakage oil pump fixed valve. In addition to the valve seat 3 in the prior art, the leakage at the end face of the valve seat is completely eliminated in the current prior art, the tripping is eliminated, and the problem of insufficient measures to deal with the leakage of the valve ball and valve seat is eliminated. The present invention provides an anti-tripping and anti-leakage oil pump fixed valve. The present invention has improved dozens of schemes, and after three years of optimization design and more than forty tests and experiments, it finally solved all the above problems with the simplest structure. Summary of the Invention

[0009] The problem to be solved by the present invention is achieved by the following technical solutions: A slip-proof and leakage-proof oil well pump fixed valve comprises a valve body 10, a leakage-proof ring 11 is arranged in the valve body 10, a leakage-proof ball 20 is installed in the valve body 10, and the leakage-proof ring 11 and the leakage-proof ball 20 form an leakage-proof combination.

[0010] Preferably, the number of the leak-proof rings 11 is 3-10.

[0011] Preferably, the number of the anti-leakage balls 20 is 3-10.

[0012] The technical principles are as follows: First, the valve seat in the existing traditional technology is eliminated, completely eliminating the problem of valve seat leakage and loosening; Secondly, the lower connector in the existing traditional technology is eliminated, completely eliminating the tripping problem; Third, an anti-leakage combination is set up with sufficient redundancy to eliminate the disadvantage of no countermeasures when leakage occurs after the valve ball and valve seat are damaged in the existing traditional technology, and solve the disadvantage of insufficient safety redundancy.

[0013] The present invention has the following beneficial effects compared with the prior art: The present invention eliminates the tripping and leakage in the current existing fixed valve technology. There is no condition for loosening and tripping at all, so all related problems such as leakage, loosening and tripping caused by the valve seat are completely solved. The 3-10 groups of anti-leakage combination eliminates the disadvantages of the existing traditional technology that there is no countermeasure for leakage after the valve ball and valve seat are damaged. It has sufficient safety redundancy and completely solves the long-standing problem that has plagued the traditional existing technology for many years. The overall structure is simpler, scientific and reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] like Figure 1 As shown, among which: 1, valve cover; 2, valve ball; 3, valve seat; 4, lower joint, as shown in the attached Figure 1 It is a traditional technology fixed valve, with Figure 1 Provide a comparative reference for the present invention.

[0015] like Figure 2 As shown, where: 10, valve body; 11, leak-proof ring; 20, leak-proof ball, as shown Figure 2 This is a structural schematic diagram of an anti-tripping and anti-leakage oil well pump fixed valve according to the present invention, which is a working state of the anti-tripping and anti-leakage oil well pump fixed valve when it is set.

[0016] like Figure 3 As shown, among which: 10, valve body; 11, leak-proof ring; 20, leak-proof ball, as shown Figure 3 This is a structural schematic diagram of an anti-tripping and anti-leakage oil well pump fixed valve according to the present invention, which is a working state of the anti-tripping and anti-leakage oil well pump fixed valve when it is opened. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0020] like Figure 2 、 Figure 3 As shown, the first embodiment of the present invention provides an anti-tripping and anti-leakage oil pump fixed valve, comprising: a valve body 10, a leak-proof ring 11 is arranged in the valve body 10, and a leak-proof ball 20 is installed in the valve body 10, and the leak-proof ring 11 and the leak-proof ball 20 form an anti-leakage combination.

[0021] Preferably, the number of the leak-proof rings 11 is 3-10.

[0022] Preferably, the number of the anti-leakage balls 20 is 3-10.

[0023] The core technologies for preventing slippage and leakage are: first, the valve seat component in the existing traditional technology is eliminated, and there is no condition for loosening or slipping, so all related problems such as leakage, loosening, and slipping are completely eliminated; second, the lower joint component in the existing traditional technology is eliminated, and the connecting thread is eliminated at the same time, so the slipping problem is completely eliminated; third, an anti-leakage combination is set up with sufficient redundancy to eliminate the disadvantage of no countermeasures for leakage after the valve ball and valve seat are damaged in the existing traditional technology, and solve the disadvantage of insufficient safety redundancy.

[0024] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and exemplary embodiments. They can be applied to a variety of fields suitable for the present invention. Further modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

[0025] In the description of the present invention, it should be noted that the term "motion" should be understood in a broad sense. It can be movement by pulling or dragging by external force, movement by relying on its own kinetic energy, or movement by relying on the interaction force of electromagnetic or magnetic energy. In specific implementation, it can be regarded as phase motion between the two. When the moving object is stationary, it can be the movement of the object relative to it.

[0026] Working process: like Figure 2 As shown, when the oil well pump is lowered into the well, the leak-proof ball 20 and the leak-proof ring 11 are in contact with each other and are in a set state.

[0027] like Figure 3 As shown in the figure, after the oil well pump is lowered into the well, it starts pumping normally. When it enters the upstroke, the cavity inside the pump above the fixed valve forms a vacuum negative pressure. The state of the anti-tripping and anti-leakage oil well pump fixed valve is as follows: Figure 3 As shown, the well fluid pushes the anti-leakage ball 20 to move upward, the anti-leakage ball 20 breaks away from the anti-leakage ring 11, the anti-tripping and anti-leakage pump fixed valve is turned from the set state to the open state, and the well fluid enters the oil pump through the inner hole.

[0028] When the oil pump is in the downstroke, the well fluid stops flowing upward, and the leak-proof ball 20 falls by gravity and sits on the leak-proof ring 11, re-sealing and returning to the state as shown in the figure. Figure 2 In the state shown, the well fluid in the pump chamber above the fixed valve of the anti-tripping and anti-leakage oil well pump enters the tubing above the plunger through the inner hole of the plunger assembly.

[0029] Normal oil production is achieved through the reciprocating alternation of up and down strokes.

[0030] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and exemplary embodiments. They can be applied to a variety of fields suitable for the present invention. Further modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. An anti-trip and anti-leakage oil pump fixed valve, characterized in that: include: A valve body (10) is provided with an anti-leakage ring (11) in the valve body (10), and an anti-leakage ball (20) is installed in the valve body (10), wherein the anti-leakage ring (11) and the anti-leakage ball (20) form an anti-leakage combination.

2. The anti-tripping and anti-leakage oil well pump fixed valve according to claim 1, characterized in that: The number of the leak-proof rings (11) is 3-10.

3. The anti-tripping and anti-leakage oil well pump fixed valve according to claim 1, characterized in that: The number of the leak-proof balls (20) is 3-10.

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