Concentric double-pipe leather cup type composite gas anchor

Abstract

The utility model discloses a concentric double-pipe leather cup type composite gas anchor, which relates to the field of oil exploitation, and comprises a centrifugal mechanism and a separation mechanism, the centrifugal mechanism comprises a plug, a lower joint, a centrifugal body and a cone, and the plug, the lower joint, the centrifugal body and the cone are sequentially connected through threads; the separating mechanism comprises an inner pipe, an outer pipe, an outer sleeve, a separating body and an upper connector, the lower end of the inner pipe is in threaded connection with the cone, the upper end of the inner pipe is freely suspended, the upper end of the outer pipe is in threaded connection with the separating body, the other end of the outer pipe is freely suspended, two ends of the outer sleeve are in threaded connection with the centrifugal body and the separating body respectively, and the upper connector is in threaded connection with the separating body. The underground gas-liquid separation device has an underground gas-liquid separation function, prevents gas from entering an oil well pump, reduces pump efficiency, avoids gas locking, and improves oil extraction efficiency.

Description

Technical Field

[0001] The utility model belongs to an auxiliary device for oil production tools, in particular to a concentric double-tube leather cup type composite air anchor. Background Art

[0002] During the oil production process, the oil pump pumps the formation crude oil to the ground, but some of the crude oil is mixed with gas. Due to the compressibility of gas, after entering the oil pump, the pump efficiency is reduced, and even gas lock is caused. Gas lock is that after the gas is compressed in the pump, the oil pump cannot suck and discharge liquid normally. The inlet and outlet of the oil pump are blocked by the compressed gas and cannot work normally. Therefore, it is necessary to separate oil and gas before the crude oil enters the oil pump to prevent the gas from entering the oil pump.

[0003] Currently, commonly used downhole oil and gas separation tools have problems such as low separation efficiency, incomplete gas separation, or the tools are too long and inconvenient to operate. Summary of the invention

[0004] In view of the defects of the prior art, the utility model aims to overcome the above shortcomings and proposes a concentric double-tube leather cup type composite air anchor.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] A concentric double-tube leather cup type composite air anchor, comprising a centrifugal mechanism and a separation mechanism, wherein the centrifugal mechanism is provided with a threaded plug, a lower joint, a centrifugal body and a cone in sequence from bottom to top; the separation mechanism comprises an inner tube, an outer tube, an outer sleeve, a leather cup seat, a leather cup, a separation body and an upper joint, wherein the lower end of the inner tube is threadedly connected to the cone, the upper end of the inner tube is freely suspended, the upper end of the outer tube is threadedly connected to the separation body, the other end of the outer tube is freely suspended, and the two ends of the outer sleeve are respectively threadedly connected to the centrifugal body and the separation body. The upper and lower ends of the upper joint are both provided with threads, and the middle is the first channel, wherein the lower end external thread of the upper joint is connected to the separation body, and the upper end internal thread of the upper joint is connected to the oil pipe; three threads are provided at both ends of the separation body, which are respectively connected to the upper joint, the outer sleeve, and the outer tube; there is an unthrough inner hole on the inner side of the lower end of the separation body, and the inner hole is divided into two sections, large and small, and the step between the two sections is used to limit the upper part of the leather cup seat; the second channel and the third channel are provided in the separation body, the second channel is led out from the inner hole, and a through hole is opened at 45 degrees to connect with the outside for gas discharge, and the third channel is a channel that runs through the upper and lower parts of the separation body, and the second channel and the third channel are not connected to each other; the root of the inner thread on the upper end of the separation body is not in contact with the third channel, and after the upper joint is threadedly connected to the separation body, the third channel can be connected to the first channel.

[0007] Furthermore, the leather cup is made of rubber material and has a bowl-shaped appearance. The open end faces the second channel, and the outer diameter of the opening of the leather cup is larger than the diameter of the inner hole of the separator. The leather cup seat is a circular metal plate with a metal rod in the center. The leather cup is vulcanized on the metal rod, and a hole is opened on the metal plate for gas to pass through. The leather cup seat is clamped on the upper limit of the step of the inner hole of the separator, and the upper part of the leather cup seat is limited by an outer tube to fix the leather cup seat and the leather cup.

[0008] Furthermore, the outer sleeve is a metal tube, with internal threads at both ends respectively connected and sealed to the separation body and the centrifugal body.

[0009] Furthermore, the outer tube is a metal tube, one end of which is provided with a thread and connected to the separation body, and the other end is freely suspended.

[0010] Furthermore, the inner tube is a metal tube, the lower end of which is provided with threads and connected to the cone, and the other end is freely suspended, the middle of the inner tube body is upward, and the inner tube is provided with a plurality of first through holes inside and outside and an internal axial channel.

[0011] Furthermore, the outer sleeve is concentric with the outer tube, and the annular space between them is the fourth channel; the inner tube is installed concentrically with the outer tube, and the annular space between them is the fifth channel.

[0012] Furthermore, both ends of the cone are provided with threads and are respectively connected to the inner tube and the centrifugal body. The cone has a conical inner hole that is smaller at the top and larger at the bottom. The minimum inner diameter of the conical inner hole is the same as the inner diameter of the inner tube, and the maximum inner diameter of the conical inner hole is the same as the inner diameter of the centrifugal body.

[0013] Furthermore, three threads are provided at both ends of the centrifugal body and are respectively connected to the outer sleeve, the cone, and the lower joint; the inside of the centrifugal body is connected through and connected up and down through the sixth channel; a plurality of second through holes are provided in the centrifugal body, the second through holes are tangent to the inner hole, and the center lines are perpendicular to each other.

[0014] Furthermore, both ends of the lower joint are provided with threads, and are respectively connected to the centrifugal body and the plug, and the central inner hole of the lower joint is through.

[0015] The utility model adopts the above technical solution and has the following beneficial effects:

[0016] When the oil pump is pumping oil, the oil and gas in the wellbore enter from channel 009 of the tool. Since channel 009 is tangent to the inner hole of the separation body, the oil and gas will rotate at high speed along the inner wall after entering the inner hole to generate centrifugal force. Since the liquid seal is much greater than the gas, under the action of centrifugal force, the gas is squeezed to the center and gathered, and the area close to the inner wall is all liquid, thereby effectively realizing gas-liquid separation, preventing gas from entering the oil pump, reducing pump efficiency, avoiding gas lock, and improving oil production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the concentric double-tube leather cup type composite air anchor of the utility model. DETAILED DESCRIPTION

[0018] 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. 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.

[0019] Example: Figure 1 As shown, a concentric double-tube leather cup type composite air anchor includes a centrifugal mechanism and a separation mechanism; the centrifugal mechanism includes a plug 11, a lower joint 10, a centrifugal body 9 and a cone 8, and the plug 11, the lower joint 10, the centrifugal body 9 and the cone 8 are connected by threads in sequence; the separation mechanism includes an inner tube 7, an outer tube 6, an outer sleeve 5, a leather cup seat 4, a leather cup 3, a separation body 2 and an upper joint 1, the lower end of the inner tube 7 is threadedly connected to the cone, and the upper end is freely suspended, the upper end of the outer tube 6 is threadedly connected to the separation body, and the other end is freely suspended, the two ends of the outer sleeve 5 are threadedly connected to the centrifugal body 9 and the separation body 2 respectively, and the upper joint 1 is threadedly connected to the separation body 2.

[0020] Among them, threads are provided at both ends of the upper joint 1, the outer thread at the lower end is connected to the separation body 2, and the inner thread at the upper end is connected to the oil pipe, and the middle is the first channel 001; three threads are provided at both ends of the separation body 2, and are respectively connected to the upper joint 1, the outer sleeve 5, and the outer tube 6; there is an unthrough inner hole on the inner side of the lower end of the separation body 2, and the inner hole is divided into two sections, large and small, and the step between the two sections is used to limit the upper part of the leather cup seat 4; the second channel 002 and the third channel 003 are provided in the separation body 2, the second channel 002 is led out from the inner hole, and a through hole is opened at 45 degrees to connect with the outside for gas discharge, and the third channel 003 is a channel that runs through the upper and lower parts of the separation body, and the second channel 002 and the third channel 003 are not connected to each other; the root of the inner thread on the upper end of the separation body 2 is more than 10 mm away from the third channel 003. After the upper joint 1 is threadedly connected to the separation body 2, the lower end of the upper joint will not block the connection between the third channel 003 and the first channel 001, and ensure a sufficiently large flow area.

[0021] In the present invention, the leather cup 3 is made of rubber material and has a bowl-shaped appearance. The open end faces the second channel 002 . The outer diameter of the opening of the leather cup 3 is approximately larger than the inner hole diameter of the separator 2 .

[0022] In the utility model, the leather cup seat 4 is a circular metal plate with a metal rod at the center. The leather cup 3 is vulcanized on the metal rod. A hole is opened on the metal plate for gas to pass through. The leather cup seat 4 is clamped on the upper limit of the inner hole step of the separation body and is limited by the outer tube 6 at the top to fix the leather cup seat 4 and the leather cup 3.

[0023] In the present invention, the outer sleeve 5 is a metal tube, and internal threads are provided at both ends to be connected and sealed with the separation body 2 and the centrifugal body 9 respectively.

[0024] In the present invention, the outer tube 6 is a metal tube, one end of which is connected to the separation body 2 through a thread, and the other end is freely suspended.

[0025] In the present invention, the inner tube 7 is a metal tube, the lower end of which is connected to the cone 8 by a thread, and the other end is freely suspended. The middle part of the tube body faces upward, and is provided with a plurality of first through holes 007 inside and outside and an internal axial channel 006.

[0026] In the utility model, the inner tube 7 is installed concentrically with the outer tube 6, and the annular space gap between the inner tube 7 and the outer tube 6 is the fifth channel 005; the outer sleeve 5 is concentric with the outer tube 6, and the annular space gap between them is the fourth channel 004.

[0027] In the utility model, the cone 8 has threads at both ends, and is connected to the inner tube 7 and the centrifugal body 9 respectively. The cone 8 has a tapered inner hole with a small top and a large bottom. The inner diameter of the smallest end is the same as the inner diameter of the inner tube 7, and the inner diameter of the largest end is the same as the inner diameter of the centrifugal body 9.

[0028] In the utility model, three threads are provided at both ends of the centrifugal body 9, and are respectively connected to the outer sleeve 5, the cone 8 and the lower joint 10; the inside of the centrifugal body 9 is connected, and the upper and lower parts are connected through the sixth channel 010; a plurality of second through holes 009 are provided in the centrifugal body 9, and the second through holes 009 are tangent to the inner hole, and the center lines are perpendicular to each other.

[0029] In the utility model, threads are arranged at both ends of the lower joint 10, and are respectively connected with the centrifugal body 9 and the plug 11, and the central inner hole is through.

[0030] The working principle and use process of this utility model are as follows:

[0031] When in use, the tool is installed below the oil pump and lowered into the wellbore together with the oil pipe. Oil and gas enter the wellbore from the formation. When the oil pump pumps oil, the oil and gas in the wellbore enter from the channel 009 of the tool. Since the channel 009 is tangent to the inner hole of the separation body, the oil and gas will rotate along the inner wall at high speed after entering the inner hole to generate centrifugal force. Since the liquid seal is much greater than the gas, the gas is squeezed to the center and gathered under the action of centrifugal force. The area close to the inner wall is all liquid, thereby realizing gas-liquid separation. Since the bottom is closed by the plug 11, the gas and liquid can only rotate upward. At the cone 8, due to the shrinkage of the inner hole, the gas and liquid can only rotate upward. The smaller the volume, the greater the rotation speed of the gas and liquid, and the further centrifugal separation of the gas and liquid. The rotating gas and liquid go upward along the inner tube to reach the first through hole 007, and the liquid in the inner wall area is thrown out from the first through hole 007, and the gathered gas goes upward along the internal axial channel 006 and gathers at the leather cup 3, where it can only flow in one direction, that is, the gas can push open the leather cup and enter the second channel 002, otherwise it is closed, and the separated liquid goes downward along the fifth channel 005, bypasses the lower end of the outer tube 6 and enters the fourth channel 004, and continues along the third channel 003 and the first channel 001 to enter the upper oil pipe to achieve gas-liquid separation.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A concentric double-tube leather cup composite air anchor, comprising a centrifugal mechanism and a separation mechanism, characterized in that: The centrifugal mechanism is provided with a threaded plug (11), a lower joint (10), a centrifugal body (9) and a cone (8) in sequence from bottom to top; the separation mechanism comprises an inner tube (7), an outer tube (6), an outer sleeve (5), a leather cup seat (4), a leather cup (3), a separation body (2) and an upper joint (1); the lower end of the inner tube (7) is threadedly connected to the cone (8); the upper end of the inner tube (7) is freely suspended; the upper end of the outer tube (6) is threadedly connected to the separation body (2); the other end of the outer tube (6) is freely suspended; the two ends of the outer sleeve (5) are respectively threadedly connected to the centrifugal body (9) and the separation body (2); the upper and lower ends of the upper joint (1) are both provided with threads, and the middle is a first channel (001); wherein the lower end external thread of the upper joint (1) is connected to the separation body (2), and the upper end internal thread of the upper joint (1) is connected to the oil pipe; The two ends of the separation body (2) are provided with three threads, which are respectively connected to the upper joint (1), the outer sleeve (5), and the outer tube (6); the inner side of the lower end of the separation body (2) is provided with an unthrough inner hole, which is divided into two sections, large and small, and the step between the two sections is used to limit the upper side of the leather cup seat (4); the separation body (2) is provided with a second channel (002) and a third channel (003), the second channel (002) is led out from the inner hole, and a through hole is opened at a 45-degree angle to communicate with the outside for gas discharge, and the third channel (003) is a channel that passes through the upper and lower parts of the separation body (2), and the second channel (002) and the third channel (003) are not connected to each other; the root of the inner thread of the upper end of the separation body (2) is not in contact with the third channel (003), and after the upper joint (1) and the separation body (2) are threadedly connected, the third channel (003) can be connected to the first channel (001).

2. A concentric double-tube leather cup type composite air anchor according to claim 1, characterized in that: The leather cup (3) is made of rubber material and is bowl-shaped. The open end faces the second channel (002). The outer diameter of the opening of the leather cup (3) is larger than the diameter of the inner hole of the separation body. The leather cup seat (4) is a circular metal plate with a metal rod at the center. The leather cup (3) is vulcanized on the metal rod. A hole is opened on the metal plate for gas to pass through. The leather cup seat (4) is clamped on the upper limit of the step of the inner hole of the separation body. The upper part of the leather cup seat (4) is limited by the outer tube (6) so that the leather cup seat (4) and the leather cup (3) are fixed.

3. A concentric double-tube leather cup type composite air anchor according to claim 1 or 2, characterized in that: The outer sleeve (5) is a metal tube, with internal threads provided at both ends and respectively connected and sealed to the separation body (2) and the centrifugal body (9).

4. A concentric double-tube leather cup type composite air anchor according to claim 1 or 2, characterized in that: The outer tube (6) is a metal tube, one end of which is provided with a thread and connected to the separation body (2), and the other end is freely suspended.

5. A concentric double-tube leather cup type composite air anchor according to claim 1 or 2, characterized in that: The inner tube (7) is a metal tube, the lower end of which is provided with a thread and connected to the cone (8), and the other end is freely suspended. The middle part of the inner tube (7) is upward, and the inner tube (7) is provided with a plurality of first through holes (007) inside and outside and an internal axial channel (006).

6. A concentric double-tube leather cup type composite air anchor according to claim 1 or 2, characterized in that: The outer sleeve (5) is concentric with the outer tube (6), and the annular gap between them is the fourth channel (004); the inner tube (7) is installed concentrically with the outer tube (6), and the annular gap between them is the fifth channel (005).

7. A concentric double-tube leather cup type composite air anchor according to claim 1 or 2, characterized in that: The cone (8) is provided with threads at both ends and is respectively connected to the inner tube (7) and the centrifugal body (9). The cone (8) has a conical inner hole which is smaller at the top and larger at the bottom. The minimum inner diameter of the conical inner hole is the same as the inner diameter of the inner tube (7), and the maximum inner diameter of the conical inner hole is the same as the inner diameter of the centrifugal body (9).

8. A concentric double-tube leather cup type composite air anchor according to claim 1 or 2, characterized in that: The centrifugal body (9) is provided with three threads at both ends and is respectively connected to the outer sleeve (5), the cone (8) and the lower joint (10); the interior of the centrifugal body (9) is connected through and is connected to the upper and lower parts through a sixth channel (010); a plurality of second through holes (009) are provided in the centrifugal body (9), and the second through holes (009) are tangent to the inner hole, and the center lines of the second through holes (009) are perpendicular to each other.

9. A concentric double-tube leather cup type composite air anchor according to claim 1 or 2, characterized in that: Both ends of the lower joint (10) are provided with threads and are respectively connected to the centrifugal body (9) and the plug (11); the central inner hole of the lower joint (10) is through-hole.

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