A suspended downhole cyclone desander

Abstract

This invention discloses a suspended downhole cyclone desander, including a Y445 packer and a hanger. The hanger includes a hanging edge and sealing grooves. The end of the hanger has a hanging edge adapted to the upper surface of the Y445 packer, and a sealing gasket is provided on the hanging edge. Multiple sealing grooves are sequentially arranged along the length of the side ring surface of the hanger, and O-rings are placed in the sealing grooves. The hanger is sealed and inserted into the Y445 packer by the O-rings, and the hanging edge rests on the upper surface of the Y445 packer by the sealing gasket. A single-flow valve mechanism and a cyclone desander mechanism are detachably arranged sequentially at one end of the hanger inside the Y445 packer. This invention, by incorporating a hanger, improves upon and provides a suspended downhole cyclone desander suitable for the Y445 packer. Simultaneously, the device is assembled and sealed using the sealing gasket and O-rings on the hanger, allowing easy separation between the hanger and the Y445 packer, achieving both a sealing effect and facilitating retrieval operations.

Description

Technical Field

[0001] This invention relates to the field of well production and injection technology, specifically to a suspended downhole cyclone desander. Background Technology

[0002] When carrying out the same-well production and injection process, the production equipment needs to be sealed with packers. The Y445 packer has certain advantages in the same-well production and injection process and can play a key sealing role, thereby achieving efficient and stable same-well production and injection operations. However, the Y445 packer is generally sealed with slips during use, which makes it difficult to retrieve internal components.

[0003] In the prior art, utility model patent with patent number CN201120160958.9 discloses a drop-type completion string, which includes: tubing; a Y445 packer disposed on the tubing; and a first-group production structure, which includes a Y341 packer and a production switch connected together, wherein the Y341 packer in the first-group production structure is connected to the tail end of the Y445 packer.

[0004] The aforementioned patent describes a wellbore production and injection device that uses a Y445 packer for sealing. This device seals the main wellbore with the Y445 packer, which has slips to support the tubing on the casing or main wellbore, thus preventing tubing creep in deep wells. However, during the production process, if special circumstances arise requiring retrieval, existing production devices all use slips for sealing with the Y445 packer, leading to difficulties in retrieval; further improvements are needed. Summary of the Invention

[0005] The purpose of this invention is to provide a suspended downhole cyclone desander, which aims to improve the problem that existing mining equipment uses slips for sealing when sealing with Y445 packers, resulting in difficulties in retrieval.

[0006] The present invention is implemented as follows: a suspended downhole cyclone desander includes a Y445 packer and a hanger, the hanger including a hanging edge and a sealing groove; the end of the hanger is provided with a hanging edge adapted to the upper end face of the Y445 packer, a sealing gasket is provided on the hanging edge, and multiple sealing grooves are sequentially provided along the length of the side ring surface of the hanger, with O-rings provided in the sealing grooves; the hanger is sealed and inserted into the Y445 packer by the O-rings, and the hanging edge rests on the upper end face of the Y445 packer by the sealing gasket; a single-flow valve mechanism and a cyclone desander mechanism are sequentially and detachably provided at one end of the hanger inside the Y445 packer.

[0007] Preferably, the sealing gasket is made of an elastic and wear-resistant material, and the hanger seals by compressing the sealing gasket under its own weight.

[0008] Preferably, the single-flow valve mechanism includes a short connector, an upper coupling, and a ball seat; the hanger, short connector, upper coupling, and ball seat are all connected in sequence by threads; the upper coupling is provided with a baffle plate and a ball inside; the ball is movably disposed between the baffle plate and the ball seat, and is seated on the oil outlet of the ball seat by gravity; the end of the ball seat away from the upper coupling is detachably connected to a vortex desanding mechanism.

[0009] Preferably, the cyclone sand removal mechanism includes an intermediate coupling, an inner central tube, an outer central tube, and a lower connector; the inner central tube is disposed inside the outer central tube without contact, and both ends are snapped onto the intermediate coupling; the intermediate coupling is installed on the ball seat by thread; and the lower connector is provided at the end of the outer central tube away from the intermediate coupling.

[0010] Preferably, one end of the inner central tube is connected to a flow valve mechanism via an intermediate clamp, while the other end is disposed inside the outer central tube without contact.

[0011] Preferably, it also includes a vortex channel, an annular space is formed between the walls of the inner central tube and the outer central tube, the vortex channel is provided in the annular space, and multiple liquid inlets are provided on the wall of the outer central tube at positions corresponding to the annular space.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. This invention provides an improved downhole cyclone desander suitable for Y445 packers by setting up a hanger. At the same time, the device is assembled and sealed by the sealing gasket and O-ring on the hanger, which makes it easy to separate the hanger and the Y445 packer, achieving both a sealing effect and facilitating retrieval operations.

[0014] 2. This invention enables normal flow of downhole fluid during collection through the cooperation between the ball-blocking plate, the ball, and the ball seat. In case of backflow due to special circumstances, the collection channel can be sealed in time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall half-section structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the suspension device of the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure between the short circuit and the ball seat of the present invention;

[0018] Figure 4This is a schematic diagram of the assembly structure of the inner central tube and the outer central tube of the present invention.

[0019] In the diagram: 1. Hanger; 101. Hanging edge; 102. Sealing groove; 2. O-ring; 3. Short connector; 4. Upper coupling; 5. Ball baffle; 6. Ball; 7. Ball seat; 8. Middle coupling; 9. Inner center tube; 10. Outer center tube; 11. Lower connector; 12. Y445 packer; 13. Sealing gasket; 14. Liquid inlet 1; 15. Swirl channel. Detailed Implementation

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0022] Example 1

[0023] like Figure 1 and Figure 2 As shown, a suspended downhole cyclone desander includes a Y445 packer 12 and a hanger 1. The hanger 1 includes a hanging edge 101 and a sealing groove 102. The end of the hanger 1 is provided with a hanging edge 101 that matches the upper surface of the Y445 packer 12. A sealing gasket 13 is provided on the hanging edge 101. Multiple sealing grooves 102 are sequentially arranged along the length of the side ring surface of the hanger 1, and O-rings 2 are provided in the sealing grooves 102. The hanger 1 is sealed and inserted into the Y445 packer 12 by the O-rings 2, and the O-rings secure the hanger 1. The hanging edge 101 is positioned on the upper surface of the Y445 packer 12 through the sealing gasket 13. The sealing gasket 13 is made of elastic and wear-resistant material. The hanger 1 seals by squeezing the sealing gasket 13 with its own weight, thus achieving a seal between the hanger 1 and the Y445 packer 12 in the annular space. The end of the hanger 1 located inside the Y445 packer 12 is detachably equipped with a single-flow valve mechanism and a vortex sand removal mechanism. This device is used for production casing suspension completion of a three-stage well structure and for horizontal wells using the same production and injection process.

[0024] like Figure 1 and Figure 3As shown, the one-way valve mechanism includes a short connector 3, an upper coupling 4, and a ball seat 7. The hanger 1, short connector 3, upper coupling 4, and ball seat 7 are all connected sequentially by threads. The upper coupling 4 is equipped with a baffle plate 5 and a ball 6. The ball 6 is movably positioned between the baffle plate 5 and the ball seat 7 and is seated on the oil inlet of the ball seat 7 by gravity to prevent the liquid in the upper part of the pipe from returning to the lower part of the pipe system. When the lower pressure is higher than the upper pressure, the liquid flows through the lower part of the ball seat 7, pushes the ball 6 aside, and reaches the upper oil pipe space of the ball 6. The baffle plate 5 can prevent the ball 6 from being pushed out of the one-way valve mechanism. When backflow occurs, the ball 6 falls back onto the oil outlet of the ball seat 7 to prevent liquid backflow. The end of the ball seat 7 away from the upper coupling 4 is detachably connected to a vortex desanding mechanism.

[0025] like Figure 1 and Figure 4 As shown, the cyclone desanding mechanism includes an intermediate coupling 8, an inner central tube 9, an outer central tube 10, and a lower connector 11. The inner central tube 9 is disposed inside the outer central tube 10 without contact, and both ends are snapped onto the intermediate coupling 8. The intermediate coupling 8 is installed on the ball seat 7 via threads. One end of the inner central tube 9 is connected to the single-flow valve mechanism through the intermediate coupling 8, and the other end is disposed inside the outer central tube 10 without contact. It also includes a cyclone channel 15, forming an annular space between the inner central tube 9 and the outer central tube 10. The cyclone channel 15 is disposed within the annular space, and multiple liquid inlets 14 are disposed on the outer central tube 10 at positions corresponding to the annular space. The outer central tube 10 is located away from... One end of the intermediate coupling 8 is equipped with a lower connector 11. The formation produced mixed fluid enters the annular space between the inner central pipe 9 and the outer central pipe 10 from the inlet 14. Due to the small annular area, the liquid velocity is high. The produced fluid flows downward at high speed through the vortex trough 15. On the one hand, the rotation generates centrifugal force, which keeps large-diameter sand particles in the produced fluid away from the inner central pipe 9, reducing the probability of sand particles entering the inner central pipe 9. On the other hand, the fluid flows downward in the annular space between the inner central pipe 9 and the outer central pipe 10. When it reaches the inlet of the inner central pipe 9, the fluid suddenly rises. The up-and-down motion generates inertial force. The fluid with a large mass has a large inertial force, causing large-diameter sand particles to settle into the next tailpipe.

[0026] Example 2

[0027] like Figure 1 and Figure 2As shown, a suspended downhole cyclone desander includes a Y445 packer 12 and a hanger 1. The hanger 1 includes a hanging edge 101 and a sealing groove 102. The end of the hanger 1 is provided with a hanging edge 101 that is adapted to the upper end face of the Y445 packer 12. A sealing gasket 13 is provided on the hanging edge 101. Multiple sealing grooves 102 are arranged sequentially along the length of the side ring surface of the hanger 1. An O-ring 2 is provided in the sealing groove 102. The hanger 1 is sealed and inserted into the Y445 packer 12 by the O-ring 2. The hanging edge 101 sits on the upper end face of the Y445 packer 12 by the sealing gasket 13. The sealing gasket 13 is made of elastic and wear-resistant material. The hanger 1 seals by squeezing the sealing gasket 13 by its own weight. A single-flow valve mechanism and a cyclone desander mechanism are detachably provided sequentially at one end of the hanger 1 inside the Y445 packer 12.

[0028] like Figure 1 and Figure 3 As shown, the single-flow valve mechanism includes a short connector 3, an upper coupling 4, and a ball seat 7; the hanger 1, short connector 3, upper coupling 4, and ball seat 7 are all connected in sequence by threads. The upper coupling 4 is equipped with a baffle plate 5 and a ball 6. The ball 6 is movably disposed between the baffle plate 5 and the ball seat 7, and is seated on the oil inlet of the ball seat 7 by gravity. The end of the ball seat 7 away from the upper coupling 4 is detachably connected to a vortex desanding mechanism.

[0029] like Figure 1 and Figure 4 As shown, the cyclone sand removal mechanism includes an intermediate coupling 8, an inner central tube 9, an outer central tube 10, and a lower connector 11. The inner central tube 9 is disposed inside the outer central tube 10 without contact, and both ends are snapped onto the intermediate coupling 8. The intermediate coupling 8 is installed on the ball seat 7 by threads. One end of the inner central tube 9 is connected to the single-flow valve mechanism through the intermediate coupling 8, and the other end is disposed inside the outer central tube 10 without contact. It also includes a cyclone groove 15. An annular space is formed between the pipe walls of the inner central tube 9 and the outer central tube 10. The cyclone groove 15 is provided in the annular space. Multiple liquid inlets 14 are provided on the pipe wall of the outer central tube 10 at positions corresponding to the annular space. The lower connector 11 is provided at the end of the outer central tube 10 away from the intermediate coupling 8.

[0030] The working principle of this invention is as follows: The formation produced mixed fluid enters the annular space between the inner central tube 9 and the outer central tube 10 through the inlet 14. Due to the small annular area, the liquid flow velocity is high. The produced fluid flows downward at high speed through the swirl channel 15. On the one hand, the rotation generates centrifugal force, which moves large-diameter sand particles in the produced fluid away from the inner central tube 9, reducing the probability of sand particles entering the inner central tube 9. On the other hand, the fluid flows downward in the annular space between the inner central tube 9 and the outer central tube 10. When it reaches the inlet of the inner central tube 9, the fluid suddenly rises. The up-and-down motion generates inertial force. The fluid with a large mass has a large inertial force, causing the large-diameter sand particles to settle into the next tailpipe.

[0031] In summary, this invention provides an improved suspended downhole cyclone desander suitable for Y445 packers 12 by setting up a hanger 1. The device is assembled and sealed using a sealing gasket 13 and an O-ring 2 on the hanger 1, allowing easy separation between the hanger 1 and the Y445 packer 12. This achieves both a sealing effect and facilitates retrieval operations. Through the cooperation between the baffle plate 5, the ball 6, and the ball seat 7, normal flow of downhole fluid can be achieved during collection. In case of backflow under special circumstances, the collection channel can be promptly sealed.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A suspended downhole cyclone desander, comprising a Y445 packer (12), characterized in that, It also includes a hanger (1), which includes a hanging edge (101) and a sealing groove (102); the end of the hanger (1) is provided with a hanging edge (101) that is adapted to the upper end face of the Y445 packer (12), and a sealing gasket (13) is provided on the hanging edge (101). Multiple sealing grooves (102) are sequentially provided along the length direction on the side ring surface of the hanger (1), and an O-ring (2) is provided in the sealing groove (102); the hanger (1) is sealed and inserted into the Y445 packer (12) by the O-ring (2), and the hanging edge (101) sits on the upper end face of the Y445 packer (12) by the sealing gasket (13); a single-flow valve mechanism and a vortex sand removal mechanism are sequentially and detachably provided at one end of the hanger (1) inside the Y445 packer (12).

2. A suspended downhole hydrocyclone desander according to claim 1, characterized in that, The sealing gasket (13) is made of elastic and wear-resistant material, and the hanger (1) seals by squeezing the sealing gasket (13) with its own weight.

3. A suspended downhole cyclone desander according to claim 1, characterized in that, The single-flow valve mechanism includes a short connector (3), an upper coupling (4), and a ball seat (7); the hanger (1), short connector (3), upper coupling (4), and ball seat (7) are connected in sequence by threads. The upper coupling (4) is provided with a ball baffle (5) and a ball (6). The ball (6) is movably disposed between the ball baffle (5) and the ball seat (7) and is seated on the oil outlet of the ball seat (7) by gravity. The end of the ball seat (7) away from the upper coupling (4) is detachably connected to a vortex desanding mechanism.

4. A suspended downhole hydrocyclone desander according to claim 3, characterized in that, The cyclone desanding mechanism includes an intermediate coupling (8), an inner central tube (9), an outer central tube (10), and a lower connector (11). The inner central tube (9) is disposed inside the outer central tube (10) without contact, and both ends are snapped onto the intermediate coupling (8). The intermediate coupling (8) is installed on the ball seat (7) by thread. The lower connector (11) is provided at the end of the outer central tube (10) away from the intermediate coupling (8).

5. A suspended downhole hydrocyclone desander according to claim 4, characterized in that, One end of the inner central tube (9) is connected to the single-flow valve mechanism through the intermediate clamp (8), and the other end is not in contact with the interior of the outer central tube (10).

6. A suspended downhole hydrocyclone desander according to claim 5, characterized in that, It also includes a vortex channel (15), an annular space is formed between the inner central tube (9) and the outer central tube (10), the vortex channel (15) is provided in the annular space, and multiple liquid inlets (14) are provided on the outer central tube (10) at positions corresponding to the annular space.

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