Spiral composite gas anchor

Abstract

The utility model relates to the technical field of oil well degassing and desanding equipment, and discloses a spiral composite gas anchor which comprises three groups of gas anchor bodies, sleeves arranged on the peripheries of the three groups of gas anchor bodies, sealing rings sleeved on the peripheries of the three groups of gas anchor bodies, and centralizing springs arranged between the adjacent gas anchor bodies. The gas anchor body comprises an upper connector with the top connected in a sealed mode. The sealing ring is arranged in the sleeve and seals the gas anchor bodies and the inner wall of the sleeve through the channel at the liquid inlet, so that gas and oil in the sleeve are mixed and can fully enter the three groups of gas anchor bodies arranged on the sealing ring at equal intervals, and a large amount of gas and oil in the sleeve are uniformly distributed; the problems that a gap between a liquid inlet in one side of the periphery of the gas anchor body eccentrically arranged in the sleeve and the inner wall of the sleeve is small, a large amount of gas-oil liquid cannot quickly enter the gas anchor body, the gas-oil liquid is gathered on the side, away from the gas anchor body, of the sleeve, and the gas-liquid separation efficiency is low are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil well degassing and sand removal equipment, in particular to a spiral composite air anchor. Background Art

[0002] The function of the air anchor is to separate part of the gas before the downhole fluid enters the pump, reduce the impact of the gas on the pump, and improve the pump efficiency. The air anchor is installed at the inlet of the pump to separate part of the gas before the oil enters the pump, reducing the amount of gas entering the pump barrel. The air anchor first separates the gas-liquid mixed liquid entering the air anchor through the principle of centrifugal separation. The separated liquid is then separated by gravity and eccentric separation. The separated liquid enters the oil pipe, and the separated gas is discharged into the annulus, thereby achieving the purpose of effective gas-liquid separation.

[0003] For example, the Chinese patent publication number CN209724314U discloses an eccentric spiral degassing, settling and desanding composite air anchor, which includes an air anchor body, a liquid inlet provided on the lower side wall of the air anchor body, a barrier member with an upper opening provided in close contact with the inner wall of the air anchor body, the barrier member being connected to the liquid inlet to form a degassing channel, a degassing spiral blade provided in the degassing channel, an exhaust mechanism provided above the fence member, the lower end of the exhaust mechanism being connected to a fence member, the fence member being arranged around the barrier member, the fence member being connected to the upper part of the fence member, and a sand bag provided at the bottom of the air anchor body below the sand settling channel. The eccentric spiral degassing, settling and desanding composite air anchor of the utility model utilizes the degassing spiral blade and the exhaust mechanism to achieve the purpose of separating gas and liquid in crude oil; the fence member and the barrier member are then used to separate the sand settling and upper liquid channels, thereby preventing the unsanded crude oil from affecting the upper liquid crude oil; after being processed by the sand settling bag, the sand is further removed by the sand-proof screen, thereby efficiently completing the degassing and desanding operations in one go.

[0004] However, the gap between the composite air anchor and the inner wall of the casing is small through the straightening spring, and the gas-liquid mixture cannot enter a large amount through the eccentrically arranged air anchor liquid inlet in the casing, so it is dispersed in large quantities to the inner wall of the casing and aggregates. The flow rate of the liquid inlet entering the gap between the air anchor and the inner wall of the casing is limited, resulting in low gas-liquid separation efficiency. Summary of the Invention

[0005] The utility model aims to provide a spiral composite gas anchor to solve the problem of limited liquid inlet flow of gas-liquid mixture into the gap between the gas anchor and the inner wall of the casing in the oil well, resulting in low gas-liquid separation efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spiral composite air anchor, comprising an air anchor body, three groups of air anchor bodies are provided with casings on the periphery, three groups of air anchor bodies are provided with sealing rings on the periphery, and a straightening spring is provided between adjacent air anchor bodies. The air anchor body comprises an upper connector with a top sealing connection, a screw plug is installed in the bottom opening of the air anchor body through a thread, and the interior of the air anchor body is respectively provided with an enclosure and a fence, and a degassing spiral is provided inside the fence.

[0007] Preferably, an exhaust hole and a liquid inlet are respectively provided at the top and the bottom of the outer periphery of the air anchor body close to the sleeve.

[0008] Preferably, an exhaust valve is provided at the top of the enclosure near the exhaust hole, and the exhaust valve is used for exhausting air.

[0009] Preferably, the sealing ring is located at the top of the outer periphery of the liquid inlet, and the degassing spiral comprises a central column and spiral sheets, and the central column is rotatably arranged at the bottom of the fence member.

[0010] Preferably, a sand-proof screen is provided on the inner wall of the air anchor body near the upper connecting head, and a sand bag is provided on the inner wall of the air anchor body near the wire plug.

[0011] Preferably, a connecting hole matching the air anchor body is provided on the top of the sealing ring, and the sealing ring fits tightly against the inner wall of the casing.

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

[0013] The utility model uses a sealing ring arranged in the casing, which seals the gas anchor body and the inner wall of the casing through the channel at the liquid inlet, so that the gas, oil and liquid mixture in the casing can fully enter the three groups of gas anchor bodies arranged at equal intervals on the sealing ring, and evenly distributes the large amount of gas, oil and liquid in the casing, avoiding the small gap between the liquid inlet on the outer side of the eccentrically arranged gas anchor body in the casing and the inner wall of the casing, so that the large amount of gas, oil and liquid cannot quickly enter the gas anchor body, resulting in accumulation on the side of the casing away from the gas anchor body, and the gas-liquid separation efficiency is low. Compared with the existing composite gas anchor, the three groups of gas anchor bodies are closely connected with the inner wall of the casing through the sealing ring, so that the large amount of gas, oil and liquid mixture can be evenly dispersed by the three groups of gas anchor bodies, avoiding accumulation in the casing, and at the same time accelerating the gas, oil and liquid efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the top view of the structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the side cross-sectional structure of the casing in the utility model;

[0017] Figure 4 This is a schematic diagram of the side cross-section structure of the gas anchor body in the utility model;

[0018] Figure 5 for Figure 4 Schematic diagram of the locally enlarged structure at point A in the middle.

[0019] In the figure: 1. casing; 2. air anchor body; 3. straightening spring; 4. sealing ring; 21. upper connector; 22. screw plug; 23. liquid inlet; 24. exhaust hole; 25. enclosure; 26. fence; 27. exhaust valve; 28. degassing spiral; 41. connecting hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] See also Figure 1-5 The utility model provides a technical solution: a spiral composite air anchor, comprising an air anchor body 2, three groups of air anchor bodies 2 are provided with a casing 1 on the periphery thereof, the three groups of air anchor bodies 2 are provided with a sealing ring 4 on the periphery thereof, and a straightening spring 3 is provided between adjacent air anchor bodies 2;

[0022] The air anchor body 2 includes an upper connector 21 with a top sealing connection, a screw plug 22 is threadedly installed in the bottom opening of the air anchor body 2, and a barrier 25 and a fence 26 are respectively provided inside the air anchor body 2. A degassing spiral 28 is provided inside the fence 26;

[0023] The gas anchor body 2 in the spiral composite gas anchor casing 1 is eccentrically arranged so that the gas-liquid mixture enters the gas anchor body 2 from the liquid inlet 23, enters the fence member 26, and spirally rises through the spiral blades in the degassing spiral member 28. The gas in the gas-liquid can be discharged from the exhaust hole 24 through the exhaust valve 27, and the liquid enters the enclosure member 25 after gas-liquid separation. The heavier sand in the oil settles and accumulates in the lower sand settling bag. The crude oil after sand removal flows upward through the upper liquid channel, and small gravel is dried out by the sand-proof screen, and then flows into the upper oil pump barrel through the upper connector 21. The composite gas anchor body 2 is an existing technical solution for gas-liquid separation in the oil well, which will not be described in detail here.

[0024] By setting the sealing ring 4 in the casing 1, the sealing ring 4 seals the gas anchor body 2 and the inner wall of the casing 1 through the channel at the liquid inlet 23, which allows the gas, oil and liquid mixture in the casing 1 to fully enter the three groups of gas anchor bodies 2 arranged at equal intervals on the sealing ring 4, thereby achieving equal distribution of the large volume of gas, oil and liquid in the casing 1, and avoiding the small gap between the liquid inlet 23 on the outer side of the eccentrically set gas anchor body 2 in the casing 1 and the inner wall of the casing 1, so that the large volume of gas and oil cannot quickly enter the gas anchor body 2, resulting in accumulation on the side of the casing 1 away from the gas anchor body 2, and the gas-liquid separation efficiency is low. Compared with the existing composite air anchor, the three groups of gas anchor bodies 2 are closely connected with the inner wall of the casing 1 through the sealing ring 4, so that the large volume of gas, oil and liquid mixture can be evenly dispersed by the three groups of gas anchor bodies 2, avoiding accumulation in the casing 1, and at the same time accelerating the gas, oil and liquid efficiency.

[0025] Among them, an exhaust hole 24 and a liquid inlet 23 are respectively opened on the top and bottom of the outer periphery of the air anchor body 2 close to the casing 1. The adjacent air anchor bodies 2 are aligned and positioned by the straightening spring 3 and the inner wall of the casing 1, so that there is a certain gap between the liquid inlet 23 on the outer periphery of the air anchor body 2 and the inner wall of the casing 1, so that the gas, oil and liquid mixture enters the air anchor body 2 and is separated.

[0026] Among them, an exhaust valve 27 is provided at the top of the enclosure 25 near the exhaust hole 24, and the exhaust valve 27 is used for exhaust. The sealing ring 4 is located at the top of the outer periphery of the liquid inlet 23. The degassing spiral 28 includes a central column and spiral blades. The central column is rotatably set at the bottom of the fence 26. The gas-liquid mixture enters the air anchor body 2 from the liquid inlet 23, enters the fence 26, and spirally rises through the spiral blades in the degassing spiral 28. The gas in the gas-liquid can be discharged from the exhaust hole 24 through the exhaust valve 27.

[0027] Among them, a sand-proof screen is provided on the inner wall of the air anchor body 2 near the upper connecting head 21, and a sand settling bag is provided on the inner wall of the air anchor body 2 near the wire plug 22. The liquid enters the enclosure 25 after gas-liquid separation, and the heavier sand in the oil settles and gathers in the lower sand settling bag. The crude oil after sand removal flows to the upper part through the upper liquid channel, and the small gravel is dried out by the sand-proof screen, and then flows into the upper oil pump barrel through the upper connecting head 21.

[0028] Among them, a connecting hole 41 matching the gas anchor body 2 is provided on the top of the sealing ring 4, and the sealing ring 4 fits tightly against the inner wall of the casing 1. Through the sealing ring 4 arranged in the casing 1, the sealing ring 4 seals the gas anchor body 2 and the inner wall of the casing 1 through the channel at the liquid inlet 23, so that the gas, oil and liquid mixture in the casing 1 can fully enter the three groups of gas anchor bodies 2 arranged at equal intervals on the sealing ring 4, thereby realizing equal distribution of a large amount of gas, oil and liquid in the casing 1.

[0029] Working principle: in use, by connecting the three groups of composite gas anchor body 2 top connector 21 into the oil pump cylinder, then, the gas oil mixture in the oil well into the casing 1, sealing ring 4 will be gas anchor body 2 and casing 1 inner wall through the liquid inlet 23 channel sealing, which makes the casing 1 gas oil mixture can fully enter the sealing ring 4 on the equidistantly arranged three groups of gas anchor body 2, realize to casing 1 in large amount of gas oil liquid even, avoid casing 1 eccentric set of gas anchor body 2 peripheral side liquid inlet 23 and casing 1 inner wall gap is small, large amount of gas oil liquid can't enter the gas anchor body 2 quickly, lead to in casing 1 away from the gas anchor body 2 side gather, gas-liquid separation efficiency is low.

[0030] Although the embodiments of the present application have been shown and described, it is to be understood that various changes and modifications can be made to these embodiments without departing from the principles of the present application, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A spiral composite air anchor, comprising an air anchor body (2), characterized in that: The three groups of air anchor bodies (2) are provided with sleeves (1) on their peripheries, and the three groups of air anchor bodies (2) are provided with sealing rings (4) on their peripheries. A straightening spring (3) is provided between adjacent air anchor bodies (2). The air anchor body (2) includes an upper connector (21) with a top sealing connection, and a screw plug (22) is installed in the bottom opening of the air anchor body (2) through a thread. The air anchor body (2) is provided with a blocking piece (25) and a fence piece (26) respectively, and a degassing spiral piece (28) is provided inside the fence piece (26).

2. A spiral composite air anchor according to claim 1, characterized in that: An air vent (24) and a liquid inlet (23) are respectively provided on the top and bottom of the outer periphery of the air anchor body (2) close to the sleeve (1).

3. The spiral composite air anchor according to claim 1, characterized in that: An exhaust valve (27) is provided at the top of the enclosure (25) near the exhaust hole (24), and the exhaust valve (27) is used for exhausting air.

4. The spiral composite air anchor according to claim 2, characterized in that: The sealing ring (4) is located at the top of the outer periphery of the liquid inlet (23), and the degassing spiral (28) includes a central column and spiral sheets, and the central column is rotatably arranged at the bottom of the fence (26).

5. The spiral composite air anchor according to claim 1, characterized in that: A sand-proof screen is provided on the inner wall of the air anchor body (2) near the upper connector (21), and a sand bag is provided on the inner wall of the air anchor body (2) near the wire plug (22).

6. The spiral composite air anchor according to claim 1, characterized in that: A connecting hole (41) matching the air anchor body (2) is provided on the top of the sealing ring (4), and the sealing ring (4) is tightly fitted to the inner wall of the sleeve (1).

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