CN214576931U

CN214576931U - Tracing composite sieve tube

Info

Publication number: CN214576931U
Application number: CN202023247029.XU
Authority: CN
Inventors: 乔鸿云; 张永华; 段会竹; 李卫平
Original assignee: Anton Oilfield Services Group Ltd
Current assignee: Beijing Hinen Hitech Petroleum Technology Development Co ltd; Anton Oilfield Services Group Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-11-02
Anticipated expiration: 2030-12-29

Abstract

The application provides a compound screen pipe of spike relates to oil gas production facility field, and it includes: a base pipe and a sand filtering sleeve; part of the tube wall of the base tube is provided with a plurality of through holes, and two ends of the base tube are respectively provided with threaded connection ends; the sand filtering sleeve is sleeved on the base pipe to wrap the through holes, a plurality of meshes are arranged on the side wall of the sand filtering sleeve, and the meshes are communicated with the through holes to provide channels for oil, water and gas; wherein, the sand filtering sleeve is of a sandwich structure; the interlayer is internally provided with a plurality of tracing strips which are arranged at intervals around the axis of the base pipe and extend along the axial direction of the base pipe, sand in the oil-gas well is blocked outside the sand filtering sleeve by the tracing strips, and oil, water and gas pass through the sand filtering sleeve and carry a tracer released by the tracing strips to enter the base pipe; set up the filter layer in the intermediate layer, the filter layer setting is in the tracer strip one side towards the parent tube, and the filter layer has the filtration hole of predetermineeing the size to prevent that the tracer strip of predetermineeing the volume from getting into the parent tube.

Description

Tracing composite sieve tube

Technical Field

The application relates to the field of oil and gas production equipment, in particular to a tracing composite sieve tube.

Background

The sand control screen pipe is widely applied to construction operation of oil wells, gas wells and water wells in oil and gas fields, a construction pipe column is connected with a sand control screen pipe tool during construction, and liquid and gas enter a production channel after being filtered by the sand control screen pipe.

However, the current sand control screen pipe does not have a tracing function, reservoir information of a stratum cannot be monitored, and if accurate reservoir information is required to be obtained, special detection equipment needs to be put in, so that the risk is high and the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a compound screen pipe of spike, main aim at solve the technical problem that current sand control screen pipe can not spike.

In order to solve the above technical problem, an embodiment of the present application provides the following technical solutions:

in one aspect the application provides a tracer composite screen, comprising:

the device comprises a base pipe, a plurality of connecting rods and a plurality of connecting rods, wherein a plurality of through holes are formed in part of the pipe wall of the base pipe, and two ends of the base pipe are respectively provided with threaded connecting ends;

the sand filtering sleeve is sleeved on the base pipe to wrap the through holes, a plurality of meshes are arranged on the side wall of the sand filtering sleeve, and the meshes are communicated with the through holes to provide channels for oil, water and gas;

wherein the sand filtering sleeve is of a sandwich structure;

a plurality of tracing strips are arranged in the interlayer and are arranged at intervals around the axis of the base pipe, the tracing strips extend along the axial direction of the base pipe, sand in the oil-gas well is blocked outside the sand filtering sleeve by the tracing strips, and oil, water and gas pass through the sand filtering sleeve and carry a tracer released by the tracing strips to enter the base pipe;

set up the filter layer in the intermediate layer, the filter layer sets up the tracer strip is towards one side of parent tube, the filter layer has the filtration hole of predetermineeing size to prevent that the tracer strip of predetermineeing the volume from getting into the parent tube.

The purpose of the utility model and the technical problem thereof can be further realized by adopting the following technical measures.

In some variations of the first aspect of the present application, the tracer composite screen described above, wherein the filter layer comprises a screen and a support screen;

the filter screen and the support screen are sequentially arranged along a first direction, a plurality of first meshes are arranged on the filter screen, and a plurality of second meshes are arranged on the support screen;

wherein the size of the second cells is larger than the size of the first cells;

the first direction is the direction in which the sand screen sleeve points to the base pipe.

In some variations of the first aspect of the present application, the tracer composite screen described above, wherein the first mesh is between 50-300um in size.

In some variations of the first aspect of the present application, the tracer composite screen described above, wherein the sand screen jacket further comprises an inner protective jacket, an outer protective jacket, and an end ring;

the outer protective sleeve is sleeved outside the inner protective sleeve at intervals so as to clamp the tracing strip in the middle;

the two end rings are respectively arranged at two ends of the inner protective sleeve and the outer protective sleeve and are simultaneously connected with the inner protective sleeve and the outer protective sleeve;

the end ring is sleeved outside the base pipe and fixedly connected with the base pipe, a third mesh is arranged on the inner protective sleeve, and a fourth mesh is arranged on the outer protective sleeve.

In some variations of the first aspect of the present application, the tracer composite screen described above, wherein the end rings are bent in any radial cross-section of the base pipe;

the first end of the end ring is connected with the base pipe, and the second end of the end ring is connected with the inner protective sleeve and the outer protective sleeve respectively at two sides close to and far away from the base pipe.

In some variations of the first aspect of the present application, the tracer composite screen described above, wherein the sand screen jacket further comprises an inner support ring;

the inner supporting ring is arranged on one side, close to the base pipe, of the second end of the end ring, and the end, extending out of the end ring, of the inner supporting ring is connected with the inner protective sleeve.

In some variations of the first aspect of the present application, the tracer composite screen described above, wherein the fourth mesh is a bridge-shaped aperture;

the third mesh is a through hole;

wherein the opening size of the third mesh is larger than the opening size of the bridge-shaped eyelet.

In some variations of the first aspect of the present application, the tracer composite screen described above, wherein the sand screen jacket further comprises a plurality of support ribs;

the supporting ribs are arranged between the outer protective sleeve and the filter layer at intervals around the axis of the base pipe, extend along the axial direction of the base pipe, and are connected with the two end rings at two ends respectively;

wherein, the brace rod sets up between adjacent tracer strip.

In some variations of the first aspect of the present application, the tracer composite screen described above, wherein the support bars have a dimension in a first direction that is greater than a dimension of the tracer bar in the first direction;

wherein the first direction is a direction in which the sand screen jacket points to the base pipe.

In some variations of the first aspect of the present application, the tracer composite screen described above, wherein the plurality of tracer bars comprises a plurality of water-based tracer bars and a plurality of oil-based tracer bars, the water-based tracer bars and the oil-based tracer bars being arranged in an alternating pattern.

Borrow by above-mentioned technical scheme, the utility model discloses compound screen pipe of spike has following advantage at least: the tracing strips are arranged in the interlayer of the sand filtering sleeve, sand in an oil-gas well can be isolated outside the sand filtering sleeve, the sand is prevented from entering the base pipe, oil, gas and water can be allowed to pass through, and the oil, gas and water are mixed with a tracer released by the tracing strips and then enter the base pipe and finally are exploited to the ground, so that a user can judge whether the oil production profile is uniform or not by analyzing produced objects, can judge the stratum water outlet position, the water outlet time and the contribution rate of oil, water and gas corresponding to the stratum, and does not need to specially enter detection equipment in the well for detecting initial reservoir information, thereby facilitating the use of the user and saving the cost; meanwhile, the filter layer is arranged in the sand filtering sleeve, so that massive tracer strips are prevented from falling off and entering the base pipe to influence subsequent product analysis and detection, and the precision of a detection result is improved.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present application will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present application are illustrated by way of example and not by way of limitation in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 schematically illustrates a structural view of a tracer composite screen;

FIG. 2 schematically illustrates a cross-sectional view of a tracer composite screen along A-A;

FIG. 3 schematically shows an enlarged schematic view at B in FIG. 2;

in the figure: the base pipe 1, the through hole 11, the second end 12, the first connecting end 13, the pipe hoop 14, the sand filtering sleeve 2, the tracer strips 21, the water-based tracer strips 211, the oil-based tracer strips 212, the filter layer 22, the filter screen 221, the support screen 222, the inner protective sleeve 23, the outer protective sleeve 24, the end ring 25, the inner support ring 26 and the support ribs 27.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.

As shown in fig. 1, 2 and 3, the embodiment of the present invention provides a tracing composite screen pipe, which is thrown into an oil and gas well and comprises a base pipe 1 and a sand screen 2;

a plurality of through holes 11 are formed in part of the tube wall of the base tube 1, and two ends of the base tube 1 are respectively provided with a threaded connection end;

the sand filtering sleeve 2 is sleeved on the base pipe 1 to wrap the through holes 11, a plurality of meshes are arranged on the side wall of the sand filtering sleeve 2, and the meshes are communicated with the through holes 11 to provide channels for oil, water and gas;

wherein, the sand filtering sleeve 2 is of a sandwich structure;

a plurality of tracing strips 21 are arranged in the interlayer, the tracing strips 21 are arranged at intervals around the axis of the base pipe 1, the tracing strips 21 extend along the axial direction of the base pipe 1, sand in the oil-gas well is blocked outside the sand filtering sleeve 2 by the tracing strips 21, and oil, water and gas pass through the sand filtering sleeve 2 and carry a tracer released by the tracing strips 21 to enter the base pipe 1;

set up filter layer 22 in the intermediate layer, filter layer 22 sets up tracer strip 21 is towards one side of base pipe 1, filter layer 22 has the filtration pore of predetermineeing size to prevent that the tracer strip 21 of predetermineeing volume from getting into base pipe 1.

Specifically, in order to solve the technical problem that the current sand control screen pipe cannot track, the embodiment of the utility model provides a track composite screen pipe, through set up the tracer strip 21 on the sand filter sleeve 2 in order to restrict the sand in the oil gas well to enter the parent tube, and realize the tracking detection to water, oil, gas; meanwhile, the arrangement of the filter layer 22 prevents the tracer strips 21 from falling off and entering the base pipe 1 to influence the detection result.

The base pipe 1 is an oil pipe commonly used in oil and gas production, the through holes 11 arranged on the pipe wall can be any shape such as a circular hole, and the through holes 11 can be regularly arranged on the pipe wall of the base pipe 1 or irregularly arranged as long as passages can be provided for water, oil and gas; the arrangement positions of the through holes 11 can be close to the middle of the base pipe 1, or the through holes 11 are not arranged at the two ends of the base pipe 1, and the through holes 11 are arranged at the rest positions.

Wherein, the sand screen casing 2 can be welded on the outer wall of the base pipe 1, the interlayer can be formed by arranging two layers of metal mesh plates at intervals, and the tracer strip 21 arranged in the interlayer can be strip-shaped or plate-shaped, for example: coating or sticking the paste or mud sand-proof tracer material on a flexible cloth or a plate-shaped sand-proof tracer material and the like; the tracing strip can not only prevent sand from passing through, but also release trace tracing substances along with fluids such as oil, water, gas and the like when passing through; the tracer on the tracer strip is known to those skilled in the art, can be simply made by the prior art or obtained by purchase, is readily understood and implemented by those skilled in the art, and is not described in detail herein; the tracer strips 21 can be arranged at intervals simply by arranging the tracer strips 21 at intervals, and can also be separated by arranging the partition plates.

Wherein, the filter layer 22 is a rigid structure with filter holes, such as: a metal mesh or plate; the filter holes are of preset sizes, the specific sizes are determined according to the sizes of the tracer materials and the particle distribution condition of the target formation sand, the sand-prevention tracer materials on the tracer strips are prevented from falling into the base pipe 1 in a block shape to influence the final detection result, the preset sizes can be adjusted and designed according to actual needs, and excessive limitation is avoided.

According to the above, the embodiment of the utility model provides a compound screen pipe of spike, through set up spike strip 21 in the intermediate layer of filter sand cover 2, can keep apart the sand in the oil gas well outside filter sand cover 2, avoid sand to get into parent tube 1, but can allow oil, gas, water to pass through, and make oil, gas, water get into parent tube 1 after mixing the tracer of spike strip 21 release, at last exploit to ground, so the user just can be through the analysis extraction thing, judge whether the oil production section is even, can judge stratum water position, go out water time and correspond the oil, water, the contribution rate of gas of stratum, need not to go into detection equipment specially in the well and carry out the detection of initial reservoir information, convenience of customers's use, save cost; meanwhile, the filter layer 22 is arranged in the sand filtering sleeve 2, so that massive tracer strips 21 are prevented from falling off and entering the base pipe 1 to influence subsequent product analysis and detection, and the precision of a detection result is improved.

Further, referring to fig. 1 and fig. 2, in a specific implementation of the tracing composite screen pipe provided by the embodiment of the present invention, the filter layer 22 includes a filter screen 221 and a support screen 222;

the filter screen 221 and the support screen 222 are sequentially arranged along a first direction a, a plurality of first meshes are arranged on the filter screen 221, and a plurality of second meshes are arranged on the support screen 222;

the first direction a is the direction in which the sand screen jacket 2 points towards the base pipe 1.

Specifically, in order to achieve the filtering effect of the filter layer 22 and not affect the flow rate of water, oil and gas entering the base pipe 1, in this embodiment, the filter layer 22 is configured to include the filter screen 221 and the support screen 222, the filter screen 221 is disposed adjacent to the tracer strip 21, the support screen 222 is disposed on a side of the filter screen 221 facing away from the tracer strip 21, that is, the support screen 222 is closer to the base pipe 1, and the filter screen 221 and the support screen 222 may be a rigid metal mesh plate or a flexible metal mesh plate; the first mesh on the filter screen 221 and the second mesh on the support screen 222 are in communication with each other to allow oil, water, gas carrying tracer to pass through; in order to prevent the tracer strips 21 from falling off into the base pipe 1 in blocks, the size of the first mesh is set to be 50-300um, preferably 150-250um, and the first mesh can be designed and adjusted according to the particle distribution of sand of an actual target formation; meanwhile, in order to increase the flow rate of oil, water and gas carrying tracers entering the base pipe 1 and improve the operation efficiency, the support net 222 is provided in the embodiment, and the size of the second mesh on the support net 222 is larger than that of the first mesh, so that the flow rate can be increased.

Further, referring to fig. 1 and fig. 3, in a specific implementation of the tracing composite screen pipe provided by the embodiment of the present invention, the sand screen jacket 2 further includes an inner protective jacket 23, an outer protective jacket 24, and an end ring 25;

the outer protective sleeve 24 is sleeved outside the inner protective sleeve 23 at intervals so as to clamp the tracer strip 21 in the middle;

the two end rings 25 are respectively arranged at two ends of the inner protective sheath 23 and the outer protective sheath 24 and are simultaneously connected with the inner protective sheath 23 and the outer protective sheath 24;

the end ring 25 is sleeved outside the base pipe 1 and fixedly connected with the base pipe 1, the inner protective sleeve 23 is provided with a third mesh, and the outer protective sleeve 24 is provided with a fourth mesh.

Specifically, the inner protective sheath 23 and the outer protective sheath 24 have the same shape but different sizes, that is, the diameter of the outer protective sheath 24 is larger than that of the inner protective sheath 23, and both the inner protective sheath 23 and the outer protective sheath 24 can be formed by punching corrosion-resistant steel plates and then rolling the punched steel plates; the third mesh and the fourth mesh on the inner protective cover 23 and the outer protective cover 24 can be regularly arranged or irregularly arranged, and are not limited to a large extent as long as oil, water and gas can pass through; the inner and outer

protective sheaths

23, 24 may be joined by welding to end rings 25 at both ends to provide strength, for example: it is possible to weld the inner protective sheath 23 to both end rings 25, then to provide the filter layer 22 and the tracer strips 21, and then to weld the outer protective sheath 24.

The end ring 25 may be connected to the base pipe 1 by welding, and the cross section of the end ring 25 along any radial direction of the base pipe 1 is bent, for example: l-shaped, referring to fig. 1, a first end of the end ring 25 is welded with the base pipe 1, and a second end of the end ring 25 is welded with the inner protective sleeve 23 and the outer protective sleeve 24 respectively near and far from two sides of the base pipe 1; the end ring 25 is not only connected with inner protective sheath 23 and outer protective sheath 24 like this in order to form between inner protective sheath 23 and outer protective sheath 24 and be used for setting up the accommodation space of spike strip 21 and filter layer 22 still supports between inner protective sheath 23 and outer protective sheath 24, avoids the two directly to paste together and extrudes the spike strip 21, influences the combination of tracer material and water, oil, gas.

Further, referring to fig. 1, in the embodiment of the present invention, the sand screen casing 2 further includes an inner support ring 26, the inner support ring 26 is disposed at the second end of the end ring 25 near one side of the base pipe 1, the inner support ring 26 extends out of the end ring 25 and the inner protective sleeve 23, and is specifically connected to the filter screen 221.

Specifically, referring to fig. 1, the inner support ring 26 and the filter screen 221 may be connected by steps and then connected by welding, the filter screen 221 may be connected to the end ring 25 without setting a large-sized flat end portion by setting the inner support ring 26, after the setting of the first mesh is completed, the area of the flat end portion may be reduced, even the flat end portion may not be performed, the process is simplified, and the cost is saved; wherein, a support ring can also be suitably arranged between the outer protective sleeve 24 and the end ring 25, and the structure can refer to the inner support ring 26, which is not described herein again; further, in order to improve the strength of the support net 222, referring to fig. 1, the connection between the support net 222 and the end ring 25 is made thicker and thicker by the thickness of the support net 222, and the inner protective sheath 23 and the end of the support net 222 are made to fit in a step transition connection.

Further, referring to fig. 1, in a specific implementation of the tracer composite sieve tube provided by the embodiment of the present invention, the fourth mesh is a bridge-shaped hole; the third mesh is a through hole;

Specifically, the fourth mesh on the outer protective sheath 24 is for filtering large sand, because it is not suitable to be configured in the form of through holes, which in this embodiment are configured as bridge-shaped meshes, so that water, steam and oil can enter from the sides of the meshes, thereby effectively filtering large sand; the bridge-shaped eyelet is formed by stamping a bulge on the metal at the eyelet position when the steel plate is punched, two opposite sides are kept connected with the steel plate main body, and the other two opposite sides are disconnected from the steel plate main body to form a bent bridge-like structure; the third mesh on the inner protective cover 23 may be formed of through holes as long as water, steam, or oil is required to pass through, and for the purpose of increasing the flow rate and improving the working efficiency, the size of the third mesh is set to be larger than the opening size of the fourth mesh in this embodiment, and more specifically: the opening size of the fourth mesh on the outer protective sheath 24 is smaller than or equal to the size of the first mesh on the filter screen 221, the size of the third mesh on the inner protective sheath 23 is larger than the size of the second mesh of the support screen 222, and the size of the second mesh of the support screen 222 is larger than the size of the first mesh on the filter screen 221.

Further, referring to fig. 2 and fig. 3, in the tracing composite sieve tube provided in the embodiment of the present invention, in a specific implementation, the sand filtering sleeve 2 further includes a plurality of support ribs 27;

the plurality of support ribs 27 are arranged around the axis of the base pipe 1 between the outer protective sleeve 24 and the filter layer 22 at intervals, the support ribs 27 extend along the axial direction of the base pipe 1, and two ends of the support ribs 27 are respectively connected with the two end rings 25;

wherein the support ribs 27 are arranged between adjacent tracer strips 21.

Specifically, in order to prevent the impact and pressure of the sand on the outer protective sleeve 24 from causing the extrusion of the tracer 24 when water, oil and gas pass through the sand filtering sleeve 2, the support ribs 27 are provided in this embodiment, the support ribs 27 are provided between the filter layer 22 and the outer protective sleeve 24, and serve as a support structure between the filter layer 22 and the outer protective sleeve 24, and two side surfaces in the radial direction are respectively in contact with the outer protective sleeve 24 and the filter layer 22, so that when the impact and pressure of the sand on the outer protective sleeve 24 are caused when water, oil and gas pass through the sand filtering sleeve 2, the outer protective sleeve 24 is supported to prevent the sand from extruding on the tracer 21 to cause the damage or the falling of the tracer 21, thereby affecting the combination of water, oil and gas; the cross section of the supporting rib 27 can be circular, rectangular or other polygonal; in order to facilitate the arrangement of the support rib 27, both ends of the support rib 27 are connected to the end rings 25 in this embodiment, and further, in order to ensure the firmness of the support rib 27, the support rib 27 may be directly welded on the surface of the filter layer 22.

Further, referring to fig. 2 and fig. 3, in a specific implementation of the tracing composite sieve tube provided by the embodiment of the present invention, the dimension of the support rib 27 along the first direction a is greater than the dimension of the tracing bar 21 along the first direction a;

wherein the first direction a is the direction in which the sand screen jacket 2 points towards the base pipe 1.

Specifically, in order to ensure the integrity of the tracing strip 21 and avoid the tracing strip 21 from being damaged or falling off due to extrusion, in this embodiment, the size of the supporting rib 27 between the filter layer 22 and the outer protective sleeve 24 is set to be larger than the thickness of the tracing strip 21, and then the supporting rib 27 can support the outer protective sleeve 24, so that a certain distance is provided between the outer protective sleeve 24 and the tracing strip 21, a sufficient space is reserved for the outer protective sleeve 24 to be impacted or depressed under pressure, and the integrity of the tracing strip 21 is effectively ensured; when the support rib 27 is cylindrical, the diameter of the support rib 27 is larger than the thickness of the tracer strip 21.

Further, referring to fig. 2 and fig. 3, the embodiment of the present invention provides a tracing composite screen pipe, in which the plurality of tracing bars 21 include a plurality of water-based tracing bars 211 and a plurality of oil-based tracing bars 212, the water-based tracing bars 211 and the oil-based tracing bars 212 are alternately disposed.

Specifically, the partition formed by the support ribs 27 not only supports the space between the filter layer 22 and the outer protective sleeve 24, but also the support ribs 27 can be used as partitions between adjacent tracer strips 21, so that a plurality of tracer strips 21 can be arranged in a way that the water-based tracer strips 211 and the oil-based tracer strips 212 are alternately arranged and separated by the support ribs 27; the tracing composite sieve tube is further suitable for environments with various products, and the subsequent result analysis can be more accurate; of course, it is understood that a plurality of the water-based tracer strips 211 may be adjacently disposed and then be arranged alternately with a plurality of the oil-based tracer strips 212.

In a specific implementation, a first end of the base pipe 1 is provided with an external thread to form a first connection end 13; the second connection end 12 of the base pipe 1 is provided with an external thread and is connected with a pipe clamp 14 with an internal thread.

Specifically, a male head and a female head are respectively formed at two ends of the base pipe 1, so that the connection of the adjacent base pipe 1 can be facilitated.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It will be appreciated that the relevant features of the devices described above may be referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed apparatus should not be construed to reflect the intent as follows: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the components of the apparatus of the embodiments may be adapted and arranged in one or more arrangements different from the embodiments. The components of the embodiments may be combined into one component and, in addition, they may be divided into a plurality of sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the components of any apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination. The various component embodiments of the present invention may be implemented in hardware, or in a combination thereof.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a compound screen pipe of spike, drops into oil gas well, its characterized in that includes:

wherein the sand filtering sleeve is of a sandwich structure;

2. The tracer composite screen according to claim 1, wherein:

the filter layer comprises a filter screen and a support screen;

3. The tracer composite screen according to claim 2, wherein:

the size of the first mesh is 50-300 um.

4. The tracer composite screen according to claim 1, wherein:

the sand filtering sleeve also comprises an inner protective sleeve, an outer protective sleeve and an end ring;

5. The tracer composite screen of claim 4, wherein:

the end ring is bent along any radial section of the base pipe;

6. The tracer composite screen of claim 5, wherein:

the sand filtering sleeve also comprises an inner supporting ring;

7. The tracer composite screen of claim 4, wherein:

the fourth mesh is a bridge-shaped eyelet;

the third mesh is a through hole;

8. The tracer composite screen of claim 4, wherein:

the sand filtering sleeve also comprises a plurality of supporting ribs;

wherein, the brace rod sets up between adjacent tracer strip.

9. The tracer composite screen of claim 8, wherein:

the size of the supporting ribs along a first direction is larger than that of the tracer strips along the first direction;

10. The tracer composite screen according to claim 1, wherein:

the plurality of tracer strips comprise a plurality of water-based tracer strips and a plurality of oil-based tracer strips, and the water-based tracer strips and the oil-based tracer strips are alternately arranged.