CN207111067U - Tandem type quantifies shear force separation gas anchor and the combination of multi-stage quantization gas anchor - Google Patents

Abstract

The utility model provides a cascade quantized shear force separation air anchor and a multi-stage quantized air anchor combination formed by combining them in series. Compared with the prior art, the utility model can achieve the purpose of liquid-gas separation regardless of intermittent separation (such as pumping well) or continuous separation (such as electric submersible pump well and screw pump well); when the output is high and the oil-gas ratio is large, A single-stage air anchor cannot separate the gas cleanly, and multiple air anchor units can be connected in series to form a combination to meet the separation requirements. It can be connected in infinite stages to realize the complete separation of gas and liquid. The fluid entering the pump is completely liquid, and the pumping efficiency of the oil well pump can be fully released. , and can also quantify subsidence gas (sand) anchors in series to realize solid-liquid-gas three-phase separation.

Description

Cascaded quantitative shear force separation air anchor and multi-level quantitative air anchor combination

technical field

The utility model belongs to the field of downhole tools used for oil well production in oil fields, in particular to a cascaded quantitative shear force separation gas anchor and a multi-stage quantitative gas anchor combination.

Background technique

The gas anchor is a downhole tool installed under the oil well pump in order to increase the filling factor of the oil well pump and improve the pump efficiency. The various gas anchors currently in use around the world cannot achieve the above-mentioned purpose. The reason is that the separated gas cannot be guaranteed to enter the annular space of the oil and sleeve from a structural point of view, that is, it is impossible to confirm that the gas anchor is effective.

1. All the gas anchor units currently used in the world cannot ensure that the separated gas enters the annular space of the tubing and casing.

2. The gas anchors currently used in the world only have one-stage gas-liquid separation, which cannot meet the needs of different liquid production volumes and different oil-gas ratios.

3 The gas anchors currently used worldwide can only be used for intermittent liquid-gas separation (such as: pumping wells), and cannot be used for continuous liquid-gas separation (such as: electric submersible pump wells, screw pump wells).

Contents of the invention

In view of this, the utility model aims to propose a cascading quantitative shear force separation air anchor to solve the above technical problems.

The technical scheme of the utility model is achieved in that:

A cascade quantized shear separation air anchor, comprising:

A gas-liquid separation coupling, an outer pipe, and a supporting joint sequentially connected from top to bottom, and the gas-liquid separation coupling and the supporting joint include an upper casing, an intermediate body, and a lower casing;

The lower casing of the gas-liquid separation coupling is socketed on the upper part of the outer pipe, and the upper casing of the supporting joint is socketed on the lower part of the outer pipe;

The center of the lower part of the intermediate body of the gas-liquid separation coupling is provided with a blind hole with the opening facing downward, and a valve ball is accommodated in the blind hole;

The outer tube is also provided with a gas collecting cap and a central tube;

The gas collecting cap comprises an upper connecting pipe, a middle horn body and a lower collecting pipe, and the inner diameter of the lower collecting pipe is greater than that of the upper connecting pipe;

The upper connecting pipe of the gas collecting cap is sleeved at the lower opening of the blind hole. The valve ball is supported by the nozzle of the upper connecting pipe and blocked by the valve ball. The valve ball can move up and down in the blind hole above the nozzle of the upper connecting pipe. , the intermediate body of the gas-liquid separation coupling is also provided with an upwardly inclined air outlet at the side wall of the blind hole above the nozzle of the upper connecting pipe, and when the valve ball is pushed away from the nozzle of the upper connecting pipe by the gas, the upper connecting pipe Can communicate with the air outlet;

The upper part of the central pipe extends into the lower air collecting pipe of the gas collecting cap, the lower end of the central pipe is embedded in the intermediate body of the supporting joint and the nozzle is blocked;

Further, the upper end of the center pipe should extend into the upper part of the lower air collecting pipe and be close to the horn body in the middle of the air collecting cap;

The intermediate body of the gas-liquid separation coupling is also provided with a liquid channel connecting the annulus between the lower gas collecting cap and the outer tube and the inner space of the upper casing above;

The annular space between the central tube and the outer tube located under the lower end of the gas collecting pipe at the lower part of the gas collecting cap is separated by a helical blade to form a helical channel. Each layer of the blade body of the blade is provided with a row of vent holes running through the upper and lower surfaces of the spiral blade near the center tube and on a direction line parallel to the axis of the center tube. The radial direction of the tubes is arranged further, and the pore diameter decreases sequentially from the inside to the outside;

The lower pipe wall of the central tube is evenly provided with several air intake slits, and the preferred way to open the air intake slits is to start at one-eighth of the length from the lower end of the central tube and end at one-half of the central tube's length; preferably, The number of air receiving slits is six. Preferably, one of the gas receiving slits is located in the same radial direction as the row of vent holes, so that the gas passing through the row of vent holes can directly enter the central pipe through the gas receiving slit. Preferably, the width of the air intake slit is less than 1 mm.

The length h of the gas collecting cap should be greater than the weight of the valve ball and the liquid column height converted from the area of the upper connecting pipe of the gas collecting cap plus the vertical height h′ from the contact point between the valve ball and the gas collecting cap to the outlet of the gas outlet combine.

The utility model also provides a multi-level quantitative air anchor combination, which can be in the following forms:

It includes two or more cascaded quantitative shear separation air anchors connected in series at the upper and lower levels. Cascading quantitative shear force separation air anchor upper casing is socketed;

Or, it includes two or more cascaded quantized shear force separation gas anchors connected in series on the upper and lower levels. Separation coupling replacement, that is, the lower end of the central tube of the cascading quantitative shear force separation gas anchor of the upper level is directly embedded in the intermediate body of the gas-liquid separation coupling of the next level and the nozzle is blocked, and the cascading type of the upper level The outer tube of the quantitative shear force separation gas anchor is socketed with the upper casing of the gas-liquid separation coupling of the next stage, and the liquid channel of the intermediate body of the gas-liquid separation coupling of the next stage is connected to the cascade quantization of the upper stage Shear force separates the helical channel of the air anchor.

Further, a quantitative subsidence gas (sand) anchor is connected to the lower casing of the support joint of the cascaded quantitative shear separation gas anchor at the bottom level:

The quantitative subsidence type gas (sand) anchor includes: an upper joint, an outer casing, and a subsidence center pipe;

The lower part of the upper joint is connected with the upper part of the outer casing, and the lower part of the upper joint is connected with the upper part of the central pipe; the central pipe is sleeved inside the outer casing, and an annular space is formed between the central pipe and the outer casing; the lower port of the outer casing is provided by a Disassemble the closure assembly;

Between the inner wall of the upper joint directly above the annulus and the outer wall of the outer casing, a plurality of liquid inlet and exhaust holes connecting the outside world and the annulus are evenly opened with the axis of the upper joint as the axis;

The volume of the annular space between the center pipe and the outer pipe is larger than the volume of two oil well pump strokes.

Further, the lower part of the upper joint protrudes outward to form an annular convex portion, and the liquid inlet and exhaust holes are opened on the annular convex portion.

Further, the upper inner wall of the outer casing protrudes inward to form an annular inner convex portion, and the liquid inlet and exhaust holes are opened in the annular inner convex portion;

Further, the liquid inlet and exhaust holes are opened on an annular component, the inner wall of the annular component is connected to the lower outer wall of the upper joint, and the outer wall of the annular component is connected to the upper inner wall of the outer casing.

Further, the detachable closure assembly includes a variable button joint and a screw plug, the inner wall of the lower port of the outer casing is threadedly connected to the upper end of the variable button joint, and the lower outer wall of the variable button joint is threadedly connected to the opening inner wall of the screw plug.

Further, a sand settling pipe communicating with the two is also added between the variable button joint and the plug.

Compared with the prior art, the utility model can achieve the purpose of liquid-gas separation regardless of intermittent separation (such as pumping well) or continuous separation (such as electric submersible pump well and screw pump well); when the output is high and the oil-gas ratio is large, A single-stage air anchor cannot separate the gas cleanly. Multiple air anchor units can be connected in series to form a combination to meet the separation requirements. It can be connected in infinite stages to realize the complete separation of gas and liquid. The fluid entering the pump is completely liquid, and the pumping efficiency of the oil well pump can be fully released. , and can also quantify subsidence gas (sand) anchors in series to realize solid-liquid-gas three-phase separation.

Description of drawings

The accompanying drawings constituting a part of the utility model are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and their descriptions are used to explain the utility model, and do not constitute an improper limitation of the utility model. In the attached picture:

Fig. 1 is a structural schematic diagram of a single cascaded quantitative shear separation air anchor;

Fig. 2 is a schematic diagram of the combined structure of the multi-stage quantized air anchor composed of two cascaded quantized shear separation air anchors connected in series.

Fig. 3 is the combined structure schematic diagram of the multi-stage quantitative gas anchor composed of two cascaded quantitative shear force separation gas anchors plus a quantitative subsidence gas (sand) anchor;

Fig. 4 is the multi-stage quantified gas anchor combination structure schematic diagram of the quantitative subsidence type gas (sand) anchor adding the sand settling pipe;

Fig. 5 is the structural representation of quantitative subsidence type gas (sand) anchor;

Fig. 6 is A-A sectional view among Fig. 5;

Fig. 7 is a schematic diagram of the structure of a quantified subsidence gas (sand) anchor with additional sand settling pipes.

1. Gas-liquid separation coupling; 2. Air outlet hole; 3. Valve ball; 4. Gas collecting cap; 5. Liquid channel; 6. Outer pipe; 7. Center pipe; 10. Supporting joint; 11. Liquid inlet hole; 12. Supporting seat; 13. Breathing hole; h is the length of the gas collecting cap; h' is the contact point between valve ball 3 and gas collecting cap 4 to the top of the air outlet The vertical height of the outlet.

Detailed ways

The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in Figure 1, a single cascaded quantitative shear separation air anchor includes:

The gas-liquid separation coupling 1, the outer pipe 6 and the supporting joint 10 connected sequentially from top to bottom, the gas-liquid separation coupling 1 and the supporting joint 10 both include an upper casing, an intermediate body and a lower casing;

The upper casing 101 of the gas-liquid separation coupling 1 can be socketed with the lower casing of the oil pipe or the supporting joint 10 of the upper stage, and can be socketed by the upper casing of the gas-liquid separation coupling 1 as shown in Figure 2 The lower casing of the supporting joint 10 can also be sleeved with the upper casing of the gas-liquid separation coupling 1 (not shown in the figure) by the lower casing of the supporting joint 10;

The lower casing 103 of the gas-liquid separation coupling 1 is threaded to fit the upper part of the outer pipe, and the upper casing of the supporting joint 10 is threaded to fit the lower part of the outer pipe;

The center of the lower part of the intermediate body 102 of the gas-liquid separation coupling 1 is provided with a blind hole with the opening facing downward, and a valve ball 3 is accommodated in the blind hole;

The outer tube 6 is also provided with a gas collecting cap 4 and a central tube 7;

The gas collecting cap 4 includes an upper connecting pipe 41, a middle horn body and a lower collecting pipe 43, and the inner diameter of the lower collecting pipe is greater than that of the upper connecting pipe;

The upper connecting pipe 41 of the gas collecting cap 4 is socketed at the lower opening of the blind hole, the valve ball 3 can be supported by the nozzle of the upper connecting pipe 41 and the nozzle can be blocked by the valve ball, and the valve ball 3 can be connected to the nozzle of the upper connecting pipe 41 The upper blind hole moves up and down, and the intermediate body of the gas-liquid separation coupling 1 also has an upwardly inclined air outlet hole 2 at the side wall of the blind hole above the nozzle of the upper connecting pipe 41, and the valve ball 3 is pushed up by the gas. When leaving the mouth of the upper connecting pipe 41, the upper connecting pipe 41 can communicate with the air outlet 2;

The upper part of the central pipe 7 extends into the lower air collecting pipe 43 of the air collecting cap 4, the lower end of the central pipe 7 is embedded in the intermediate body of the supporting joint 10 and the nozzle is blocked;

Preferably, for better gas collection, the upper end of the center pipe 7 should extend into the upper part of the lower gas collecting pipe 43, and be close to the horn body in the middle of the gas collecting cap 4;

The intermediate body of the gas-liquid separation coupling 1 is also provided with a liquid channel 5 (as shown in FIG. 1 ) that communicates with the annular space between the lower gas collecting cap 4 and the outer tube 6 and the inner space of the upper casing above;

The annular space between the center pipe and the outer pipe 6 located below the lower end of the gas collecting pipe 43 at the lower part of the gas collecting cap 4 is separated by a helical blade to form a spiral channel, and the lower end of the spiral channel passes through the liquid inlet hole 11 provided by the supporting joint 10 Connected with the outside world, each layer of the blade body of the helical blade is provided with a row of 13 rows of air holes that run through the upper and lower surfaces of the helical blade near the central tube 7 and on the direction line parallel to the axis of the central tube, and each row is ventilated. The vent holes of the row of holes are arranged along the radial direction of the central tube, and the diameter of the holes decreases sequentially from the inside to the outside. Figure 1 shows an example of three vent holes forming a row of vent holes. It should be noted that each layer of blades described here does not mean that the blades of the layers are not connected to each other. The layer here refers to a direction that is parallel to the axis of the central tube and passes through the spiral blade. When a line is used, the upper and lower layers of the leaves that the direction line passes through.

The lower tube wall of the central tube is evenly provided with several air receiving slits 8, and the preferred mode of the air receiving slits is to start from the lower end of the central tube at one-eighth of the length and end at one-half of the central tube's length. Preferably, the number of air receiving slits is six. Preferably, one of the gas receiving slits is located in the same radial direction as the row of vent holes, so that the gas passing through the row of vent holes can directly enter the central pipe through the gas receiving slit. Preferably, the width of the air intake slit 8 is less than 1 mm.

In addition, the length h of the gas collecting cap should be greater than the weight of the valve ball and the liquid column height converted from the area of the upper connecting pipe 41 of the gas collecting cap 4 plus the distance between the contact point of the valve ball 3 and the gas collecting cap 4 to the air outlet 2 The sum of the vertical height h' of the outlet. Therefore, it is ensured that the gas in the gas collecting cap can open the valve ball 3 and enter the oil jacket annulus smoothly through the air outlet hole 2 .

For example: the weight of the valve ball (mass, G, in kilograms) is 10 grams (ie 0.01 kilograms), and the nozzle area (S, in square meters) of the upper connecting pipe 41 of the gas collecting cap 4 is 1 square centimeter (ie 0.0001 square meter), then the minimum pressure to open the valve ball is 0.01 atmospheric pressure (K). In engineering, 10 meters of water column is 1 atmospheric pressure, so 0.01 atmospheric pressure is equivalent to water column (ie liquid column height L, in meters) is 10 cm (ie 0.1 meters); the formula is L=(G/S)*10;

h' has a length of 20 cm;

Then h must be greater than the sum of L+h', that is, greater than 30 cm.

The working principle of the cascade quantitative shear separation air anchor is as follows:

The fluid enters the lower end of the inner spiral channel of the outer tube 6 from the liquid inlet hole 11 , and rotates upward along the outer wall of the central tube 7 along the spiral channel formed by the helical blade 9 . Under the action of centrifugal force, the liquid in the fluid is close to the inner wall of the outer tube, and the gas passes through the vent hole 13 in the process of going up against the central tube, and then passes through the vent hole 13 to rise to the upper layer. The gas slit 8 enters the central tube 7. Since the viscosity of the gas is much smaller than that of the liquid, it is easier to enter the central tube through the gas receiving slit, and continue upward along the inner wall of the central tube 7 to enter the gas collecting cap 4. When the gas in the gas collecting cap 4 When the pressure is greater than the weight of the valve ball 3 and the pressure of the liquid column at the height of h', the gas pushes away the valve ball 3 and enters the annular space of the oil jacket from the air outlet hole 2; the liquid in the fluid flows along the annular space between the outer tube 6 and the gas collecting cap. It goes up through the liquid channel 5 and enters the oil well pump or enters the upper stage gas anchor to continue separation.

The combination of multi-level quantitative gas anchors can be in the following forms:

The combined form shown in Figure 2 includes two or more cascaded quantitative shear separation gas anchors connected in series at the upper and lower levels, and the supporting joint of the cascaded quantitative shear separation gas anchor at the upper level The lower casing of 10 is socketed with the upper casing of the cascaded quantitative shear force separation air anchor of the next stage;

Or the combined form shown in Figure 3 also includes two or more cascaded quantized shear force separation gas anchors connected in series on the upper and lower sides, and the bearing of the cascaded quantized shear force separation gas anchor of the upper level The support joint 10 is replaced by the gas-liquid separation collar of the next stage, that is, the lower end of the central tube of the cascaded quantitative shear force separation gas anchor of the previous stage is directly embedded in the intermediate body of the gas-liquid separation collar of the next stage and the nozzle Plugging, the outer tube of the cascading quantitative shear separation gas anchor of the upper level is socketed with the upper casing of the gas-liquid separation coupling of the lower level, and the intermediate liquid of the gas-liquid separation coupling of the lower level The channel is connected to the helical channel of the cascaded quantized shear separation air anchor of the upper stage.

This form saves support joints.

In addition, in order to enhance the separation effect of solid phase components and realize the three-phase separation of gas, solid and liquid, as shown in Figure 3, under the supporting joint of the cascaded quantitative shear force separation gas anchor at the bottom level The casing is connected to a quantitative subsidence gas (sand) anchor:

As shown in Figure 5, the quantitative subsidence type gas (sand) anchor includes: an upper joint, an outer casing, and a subsidence center pipe;

The upper part of the upper joint is connected (communicated) with the supporting joint of the cascaded quantitative shear force separation gas anchor of the upper level, the outer wall of the lower part of the upper joint is connected with the upper inner wall of the outer casing, and the inner wall of the lower part of the upper joint is connected with the settlement central pipe The outer wall of the upper part is connected; the settling central pipe is sleeved inside the outer casing, and an annular space (that is, "annulus") is formed between the settling central pipe and the outer casing; the lower port of the outer casing is blocked by a detachable closure assembly. In this embodiment, the detachable closure assembly includes a variable button joint and a screw plug. The inner wall of the lower port of the outer casing is threaded to the upper end of the variable button joint, and the lower outer wall of the variable button joint is threaded to the inner wall of the opening of the screw plug. The buckle joint and the plug jointly block the lower opening of the outer sleeve.

Between the inner wall of the upper joint and the outer wall of the outer casing directly above the annular space, a plurality of liquid inlet and exhaust holes are evenly opened with the axis of the upper joint as the axis, as shown in Figure 6; the liquid inlet and exhaust holes It can be used not only as an inlet channel for liquids, but also as an outlet channel for gases;

The liquid inlet and exhaust holes can be set at the lower part of the upper joint, that is, the lower part of the upper joint protrudes outward to form an annular convex part, and the liquid inlet and exhaust holes are opened at the annular outer convex part; Figures 5 and 6 of this embodiment show is this way.

The liquid inlet and exhaust holes can also be set on the upper part of the outer casing, that is, the upper inner wall of the outer casing protrudes inward to form an annular inner convex part, and the liquid inlet and outlet holes are opened on the annular inner convex part;

The liquid inlet and exhaust holes can also be opened on an annular component, the inner wall of the annular component is connected to the lower outer wall of the upper joint, and the outer wall of the annular component is connected to the upper inner wall of the outer casing.

In addition, the volume of the annulus between the settling central pipe and the outer casing indicated by L1 in FIG. 5 is larger than the volume of two oil well pump strokes. And this point is the key point for the best performance of the air anchor, please see below for details:

Analysis of working principle: Before the formation fluid enters the liquid inlet hole of the subsidence gas anchor, the gas is always in the state of slipping from the fluid. After entering the subsidence gas anchor annulus from the liquid inlet and exhaust holes, when the pumping unit is in the downstroke and the fluid is stagnant, the gas in the fluid in the annulus between the outer pipe and the subsidence central pipe slips again. Since the annulus volume of the outer casing and the center pipe of the settlement indicated by L1 is greater than or equal to the volume of two pump strokes, each stroke sucks the liquid in the lower half of the annulus corresponding to L1 into the center pipe of the settlement and then enters the oil well pump. Half of the liquid flows into the lower half, and the fluid outside the gas anchor enters the upper half of the annulus through the liquid inlet and exhaust holes again, and the gas continues to slip out of the fluid when the downstroke of the oil well pump is stagnant. The gas slips upward and is discharged from the liquid inlet and exhaust holes. The cycle is reciprocated so that the fluid entering the pump does not contain gas each time. Thereby achieving a high filling factor of the oil well pump and improving pumping efficiency.

Although the space formed by the outer sleeve body below L1, the variable button joint and the plug can also play the role of separating and depositing the solid phase components from the liquid, but because the length and volume are relatively small, it can be used as As shown in Figure 4 and Figure 7, a grit settling pipe communicating with the former two can also be added between the variable buckle joint and the plug, and the upper part of the grit settling pipe and the lower part of the variable buckle joint are fixedly connected by a connecting hoop , and the openings of the two are butt-connected, and the lower part of the sand settling pipe is connected with the screw plug. The solid phase components in the fluid entering the annulus sink into the grit chamber (and plug) under the joint action of shear force and gravity. The length of the grit chamber varies according to the content of the solid phase. The addition of the sand settling tube greatly increases the overall length and volume, enhances the solid-liquid separation and deposition effect, prolongs the single use time, and reduces the maintenance frequency for removing deposited sand bodies.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (10)

1. The cascading quantitative shear force separation air anchor is characterized in that it includes: A gas-liquid separation coupling, an outer pipe, and a supporting joint sequentially connected from top to bottom, and the gas-liquid separation coupling and the supporting joint include an upper casing, an intermediate body, and a lower casing; The lower casing of the gas-liquid separation coupling is socketed on the upper part of the outer pipe, and the upper casing of the supporting joint is socketed on the lower part of the outer pipe; The center of the lower part of the intermediate body of the gas-liquid separation coupling is provided with a blind hole with the opening facing downward, and a valve ball is accommodated in the blind hole; The outer tube is also provided with a gas collecting cap and a central tube; The gas collecting cap includes an upper connecting pipe, a middle horn body and a lower collecting pipe, and the inner diameter of the lower collecting pipe is larger than that of the upper connecting pipe; The upper connecting pipe of the gas collecting cap is sleeved at the lower opening of the blind hole. The valve ball is supported by the nozzle of the upper connecting pipe and blocked by the valve ball. The valve ball can move up and down in the blind hole above the nozzle of the upper connecting pipe. , the intermediate body of the gas-liquid separation coupling is also provided with an upwardly inclined air outlet at the side wall of the blind hole above the nozzle of the upper connecting pipe, and when the valve ball is pushed away from the nozzle of the upper connecting pipe by the gas, the upper connecting pipe Can communicate with the air outlet; The upper part of the central pipe extends into the lower air collecting pipe of the air collecting cap, the lower end of the central pipe is embedded in the intermediate body of the supporting joint and the nozzle is blocked; The intermediate body of the gas-liquid separation coupling is also provided with a liquid channel connecting the annulus between the lower gas collecting cap and the outer tube and the inner space of the upper casing above; The annular space between the central pipe and the outer pipe located under the lower end of the gas collecting pipe at the lower part of the gas collecting cap is separated by a spiral blade to form a spiral channel, and the lower end of the spiral channel communicates with the outside world through the liquid inlet hole opened by the supporting joint; Each layer of the blade body of the helical blade is provided with a row of vent holes running through the upper and lower surfaces of the helical blade near the central tube and on a direction line parallel to the axis of the central tube. The radial direction arrangement of the central tube; The lower wall of the central tube is uniformly opened with several air receiving slits; The length of the gas collecting cap should be greater than the sum of the weight of the valve ball and the liquid column height converted from the area of the upper connecting pipe of the gas collecting cap plus the vertical height from the contact point of the valve ball and the gas collecting cap to the outlet of the air outlet. 2. The cascaded quantitative shear force separation air anchor according to claim 1, characterized in that: the upper end of the central pipe should extend into the upper part of the lower air collecting pipe, and be close to the horn body in the middle of the air collecting cap. 3. The cascaded quantitative shear force separation air anchor according to claim 1, characterized in that: the air holes in each row of air hole rows decrease sequentially from the inside to the outside along the radial direction of the central tube. 4. The cascading quantitative shear force separation air anchor according to claim 1, characterized in that: the opening of the air receiving slit starts at one-eighth of the length from the lower end of the central tube and ends at one-half of the length of the central tube. 5. The cascaded quantitative shear force separation air anchor according to claim 1, wherein one of the air receiving slits is located in the same radial direction as the row of vent holes. 6. The combination of multi-level quantized air anchors is characterized in that: it comprises two or more cascaded quantitative shear separation air anchors as claimed in claim 1 connected in series up and down. 7. The multi-level quantitative gas anchor combination according to claim 6, characterized in that: the lower casing of the supporting joint of the cascaded quantized shear force separation air anchor of the upper level and the cascaded quantized of the lower level The upper casing of the shear separation air anchor is socketed. 8. The multi-level quantitative gas anchor combination according to claim 6, characterized in that: the supporting joint of the cascaded quantitative shear force separation gas anchor of the upper level is replaced by the gas-liquid separation coupling of the lower level, that is The lower end of the central tube of the cascaded quantitative shear force separation air anchor of the upper stage is directly embedded in the intermediate body of the gas-liquid separation coupling of the next stage and the nozzle is blocked, and the cascade quantitative shear force separation air anchor of the upper stage The outer tube of the lower stage is socketed with the upper casing of the gas-liquid separation coupling of the lower stage, and the liquid channel of the intermediate body of the gas-liquid separation coupling of the lower stage is connected to the cascade type quantitative shear force separation gas anchor of the upper stage. Spiral channel. 9. The multi-level quantized air anchor combination according to any one of claims 6 to 8, characterized in that: the cascaded quantized shear force separation gas anchor at the bottom level is connected to a quantized Subsidence air anchor or sand anchor: The quantitative subsidence type air anchor or sand anchor includes: upper joint, outer casing, and subsidence center pipe; The lower part of the upper joint is connected with the upper part of the outer casing, and the lower part of the upper joint is connected with the upper part of the central pipe; the central pipe is sleeved inside the outer casing, and an annular space is formed between the central pipe and the outer casing; the lower port of the outer casing is provided by a Disassemble the closure assembly; Between the inner wall of the upper joint directly above the annulus and the outer wall of the outer casing, a plurality of liquid inlet and exhaust holes connecting the outside world and the annulus are evenly opened with the axis of the upper joint as the axis; The volume of the annular space between the center pipe and the outer pipe is larger than the volume of two oil well pump strokes. 10. The multi-level quantitative gas anchor combination according to claim 9, characterized in that: the detachable closure assembly includes a variable button joint and a screw plug, the inner wall of the lower port of the outer casing is threadedly connected with the upper end of the variable button joint, and the variable button joint The lower outer wall of the lower part is threadedly connected with the opening inner wall of the plug.