Side opening ring valve

Abstract

The application discloses a side opening ring valve, which comprises a lateral valve outer sleeve and a fixed valve inner sleeve, the lateral valve outer sleeve is connected with one end of the fixed valve inner sleeve through a thread connection, and the other end is sealed through an insertion type sealing ring, and a ring space formed by the lateral valve outer sleeve and the fixed valve inner sleeve is sequentially provided with a ring valve ball, a ring valve seat, an outer top pipe and an inner top pipe from top to bottom, when the pump works, the valve ball can be appropriately rotated, and is frequently changed with the valve seat to coincide with each other, so that the service life of the valve is effectively guaranteed, the effectiveness of the valve is guaranteed, the long-term effective operation of the layered oil production is guaranteed, the oil well production capacity is fully tapped, the oil field development effect is improved, and the problem of multiple valve balls not being tightly closed is completely avoided.

Description

Technical Field

[0001] This invention relates to the field of stratified oil production technology in oilfield development, and in particular to a side-opening annular valve. Background Technology

[0002] Currently, in the oilfield development process, due to differences in permeability between layers, coupled with poor post-development practices, significant conflicts have arisen between oil layers. During production, high-pressure layers flow back into low-pressure layers, resulting in limited production capacity in low-pressure layers and wasted production capacity in high-pressure layers.

[0003] To resolve the conflict between different layers of oilfields, petroleum workers developed a stratified oil production pump, which has proven effective in field applications. However, this pump consists of a double piston, a double pump barrel, and double fixed valves, with the upper fixed valve composed of several lateral inlet ball valves. The characteristic of this type of valve is that several ball valves are distributed around the sidewall of the fixed valve, resulting in a relatively small flow area for each valve seat and thus a large force on the pump for well fluid. Due to the influence of machining precision, the flow areas of different valve seats are inconsistent, leading to varying forces on each ball valve. Error values ​​close to or exceeding the weight of the ball significantly affect the stress state of each ball valve, causing asynchronous opening and closing of several ball valves. This asynchronous opening and closing of the balls severely impacts both the pump efficiency of the upper pump and the service life of the upper fixed valve, thus shortening the pump inspection cycle, increasing production costs, and reducing oil well output. Therefore, this case study was developed to address these issues. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by designing a side-opening annular valve, which solves the problems of asynchronous opening and closing of multiple valve balls and incomplete closure in the prior art.

[0005] The technical solution of the present invention to achieve the above objectives is as follows: a side-opening annular valve, comprising a side valve outer sleeve and a fixed valve inner sleeve, wherein one end of the side valve outer sleeve and the fixed valve inner sleeve are connected by threads and the other end is sealed to each other by an insert-type sealing ring; an annular valve ball, an annular valve seat, an outer top tube and an inner top tube are arranged sequentially from top to bottom in the annular space formed by the side valve outer sleeve and the fixed valve inner sleeve; a liquid inlet channel is provided on the fixed valve inner sleeve; and several axial liquid passage grooves are provided on the inner and outer walls of the annular valve ball, wherein the liquid passage grooves are arranged as inclined grooves at a certain angle to the axis.

[0006] The aforementioned side valve sleeve has four stepped holes arranged from top to bottom inside. The first section has an internal thread for connection with the upper pump cylinder. The second section is a reduced diameter section with a smooth inner surface of the through hole for clearance sealing with the small diameter section of the fixed valve inner sleeve. The second section has an axial through hole on the side wall and radial connecting ribs between the axial through holes. The third section is an expanded diameter section with a smooth inner diameter that forms a clearance fit with the outer diameter of the annular valve ball 4, allowing the annular valve ball to slide within it. The fourth section is a further expanded diameter section with a smooth end face formed with the third section, and the end face has a high perpendicularity to the axis.

[0007] The aforementioned annular valve seat is sealed to the side valve sleeve through its end face. The outer jacking tube directly fixes the outer circle of the annular valve seat along the axial direction, and the inner jacking tube directly fixes the inner circle of the annular valve seat along the axial direction.

[0008] The outer side of the inner wall and the inner side of the outer wall of the upper end face of the above-mentioned annular valve seat are respectively provided with a certain angle of chamfer, forming a valve seat mechanism of annular valve ball and annular valve ball grinding to form a tight fit and seal.

[0009] The upper inner and outer wall end faces of the aforementioned annular valve ball are streamlined, and the lower inner and outer wall end faces are smooth chamfers at a certain angle. After being ground together with the smooth chamfer of the annular valve seat, they form a tight fit and seal.

[0010] The aforementioned fixed valve inner sleeve is provided with a through hole and the outer wall is arranged in three steps from top to bottom. The first step has a smooth surface with high axial concentricity and high outer roundness. Sealing sections are provided near the end and in the middle of the first step for sealing with the side valve outer sleeve and the annular valve seat. The second step is a diameter-changing step that axially presses the inner jacking pipe and indirectly axially presses the annular valve seat. The third step is a diameter-expanding step and is provided with an axial through hole. There are partitions between the through holes as connecting reinforcing ribs. The lowest end of the third step is provided with an external thread for connecting with the lower accessory.

[0011] The aforementioned annular valve seat is equipped with annular valve seat reinforcing ribs.

[0012] The side-opening annular valve manufactured using the technical solution of this invention has its upper and lower parts connected to other oil pumping accessories. The oil pump piston is connected by a connecting rod, which slides and seals within the through hole of the fixed valve inner sleeve. During the upward stroke of the oil pump, the well fluid passes through the inlet channel of the fixed valve inner sleeve, the annular valve ball, and then through the inclined grooves inside and outside the annular valve ball into the upper pump barrel. During the downward stroke, it closes, forming the function of the upper pump fixed valve. When the pump is working, the valve ball can rotate appropriately, frequently changing its engagement point with the valve seat, effectively ensuring the service life and effectiveness of the valve. This ensures the long-term effective operation of stratified oil production, fully taps the oil well's production capacity, improves the oilfield development effect, and completely avoids the problem of multiple valve balls not closing tightly. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the main structure of a side-opening annular ball valve according to the present invention.

[0014] Figure 2 The side-opening annular ball valve described in this invention Figure 1 A schematic diagram of the AA-direction cross-section structure.

[0015] Figure 3 This invention relates to a side-opening annular ball valve. Figure 1 Schematic diagram of the BB-direction cross-section structure.

[0016] In the diagram: 1-Side valve outer sleeve, 2-Fixed valve inner sleeve, 3-Sealing ring, 4-Annular valve ball, 5-Annular valve seat, 6-Annular valve seat reinforcing rib, 7-Outer jacking pipe, 8-Inner jacking pipe, 9-Inlet channel. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings, such as... Figure 1-3 As shown, the components in this case can be connected sequentially by those skilled in the art. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the art. The working principle and process are mainly described below.

[0018] Example: As per the instruction manual Figure 1-3 As can be seen, this scheme includes a side valve outer sleeve 1 and a fixed valve inner sleeve 2. The side valve outer sleeve 1 and the fixed valve inner sleeve 2 are connected at one end by a thread and sealed to each other at the other end by an insertion sealing ring 3. In the annular space formed by the side valve outer sleeve 1 and the fixed valve inner sleeve 2, an annular valve ball 4, an annular valve seat 5, an outer jacking pipe 7, and an inner jacking pipe 8 are arranged sequentially from top to bottom. The fixed valve inner sleeve 2 has a liquid inlet channel 9. Several axial liquid passage grooves are provided on the inner and outer walls of the annular valve ball 4. The liquid passage grooves are set as inclined grooves at a certain angle to the axis. The annular valve seat 5 is provided with annular valve seat reinforcing ribs. 6. Both the upper and lower parts are connected to other oil pumping accessories. The oil pump piston is connected by a connecting rod, which slides and seals within the through hole of the fixed valve inner sleeve. During the upper stroke of the oil pump, the well fluid passes through the inlet channel of the fixed valve inner sleeve, the annular valve ball, and then through the inner and outer inclined grooves of the annular valve ball into the upper pump barrel. During the lower stroke, it closes, forming the function of the upper pump fixed valve. When the pump is working, the valve ball can rotate appropriately, frequently changing its engagement point with the valve seat, effectively ensuring the service life and effectiveness of the valve. This ensures the long-term effective operation of stratified oil production, fully taps the oil well's production capacity, and improves the oilfield development effect.

[0019] In the specific implementation process, the above-mentioned side valve sleeve 1 is provided with four stepped holes from top to bottom. The first section is provided with internal threads for connection with the upper pump cylinder. The second section is a reduced diameter section with a smooth inner surface of the through hole for gap sealing with the small diameter section of the fixed valve inner sleeve 2. The second section is provided with axial through holes on the side wall and radial connecting ribs are provided between the axial through holes. The third section is an expanded diameter section with a smooth inner diameter that forms a clearance fit with the outer diameter of the annular valve ball 4, and the annular valve ball 4 can slide in it. The fourth section is a further expanded diameter section with a smooth end face of the step formed with the third section and a high perpendicularity of the end face to the axis. The above-mentioned annular valve seat 5 is sealed with the side valve sleeve 1 through the end face. The outer jacking pipe 7 directly fixes the outer circle of the annular valve seat 5 along the axis, and the inner jacking pipe 8 directly fixes the inner circle of the annular valve seat 5 along the axis. The structure is simple and the design is reasonable, which can fully ensure the stability of operation and facilitate processing and production.

[0020] In the specific implementation process, the outer side of the inner wall and the inner side of the outer wall of the upper end face of the above-mentioned annular valve seat 5 are respectively provided with a certain angle of chamfer, forming a valve seat mechanism of annular valve ball 4 and annular valve ball 4 to form a tight fit and seal. The upper inner and outer wall end faces of the above-mentioned annular valve ball 4 are set in a streamline shape and the lower inner and outer wall end faces are set with a certain angle of smooth chamfer, and after being ground with the smooth chamfer of the annular valve seat 5, a tight fit and seal are formed. The annular valve ball 4 and annular valve seat 5 can be effectively fitted to form a fit and seal at the contact position, thereby effectively ensuring the sealing tightness of the annular valve ball 4 and annular valve seat 5.

[0021] In the specific implementation process, the aforementioned fixed valve inner sleeve 2 is provided with a through hole and the outer wall is arranged in three steps from top to bottom. The first step has a smooth surface with high axial concentricity and high outer roundness. Sealing sections are provided near the end and in the middle of the first step to seal with the side valve outer sleeve 1 and the annular valve seat 5. The second step is a diameter-changing section step that axially presses the inner top tube 8 and indirectly axially presses the annular valve seat 5. The third step is a diameter-expanding section step with axial through holes. There are partitions between the through holes as connecting reinforcing ribs. The bottom of the third step is provided with an external thread for connection with the lower accessory. The structure is simple and has high stability. The entire fixed valve inner sleeve 2 can be integrally machined, and the parts have high versatility and are easy to maintain.

[0022] The above technical solutions only embody the preferred technical solutions of the present invention. Any modifications that may be made by those skilled in the art to certain parts thereof embody the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A side-opening annular valve, characterized in that, The device includes a side valve outer sleeve (1) and a fixed valve inner sleeve (2). The side valve outer sleeve (1) and the fixed valve inner sleeve (2) are connected at one end by a thread and sealed at the other end by an insert-type sealing ring (3). In the annular space formed by the side valve outer sleeve (1) and the fixed valve inner sleeve (2), an annular valve ball (4), an annular valve seat (5), an outer top tube (7), and an inner top tube (8) are arranged sequentially from top to bottom. The fixed valve inner sleeve (2) has a liquid inlet channel (9). The inner and outer walls of the annular valve ball (4) are... Several axial fluid passage grooves are provided, and the fluid passage grooves are set as inclined grooves at a certain angle to the axis; the inner side of the inner wall and the inner side of the outer wall of the upper end face of the annular valve seat (5) are respectively set with a certain angle of chamfer, forming a valve seat mechanism of the annular valve ball (4) and grinding with the annular valve ball (4) to form a tight fit seal; the upper inner and outer wall end faces of the annular valve ball (4) are set as streamlined and the lower inner and outer wall end faces are set as smooth chamfers at a certain angle, and after grinding with the smooth chamfer of the annular valve seat (5), a tight fit seal is formed.

2. The side-opening annular valve according to claim 1, characterized in that, The annular valve seat (5) is sealed to the side valve sleeve (1) through its end face. The outer top tube (7) directly fixes the outer circle of the annular valve seat (5) along the axial direction. The inner top tube (8) directly fixes the inner circle of the annular valve seat (5) along the axial direction.

3. A side-opening annular valve according to claim 1, characterized in that, The annular valve seat (5) is provided with annular valve seat reinforcing ribs (6).

Images