CN216621630U

CN216621630U - Screen pipe and screen pipe hole sealing experimental device

Info

Publication number: CN216621630U
Application number: CN202122777735.3U
Authority: CN
Inventors: 邱成松; 郑威; 曾琦军
Original assignee: Chengdu Inos Technology Co ltd
Current assignee: Chengdu Inos Technology Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-05-27
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a sieve tube and a sieve tube hole sealing experimental device, wherein the sieve tube comprises a tube body, sieve tube holes communicated with the inside of the tube body are formed in the side wall of the tube body, and fusible plugs are arranged in the sieve tube holes in a sealing mode. The utility model discloses a screen pipe keeps sealed under the in-process of going into the pit shaft all the time, and fluid in the pit shaft can't pass through the screen pipe overflow, after the screen pipe to the settlement position and reach the melten condition, makes the melten end cap dissolve, and the deblocking is accomplished to the screen pipe, and the deblocking process need not to carry out extra operation of going into, can not lead to the fact the destruction to the body of screen pipe.

Description

Screen pipe and screen pipe hole sealing experimental device

Technical Field

The utility model belongs to the field of petroleum and natural gas equipment, and particularly relates to a sieve tube and a sieve tube hole sealing experimental device.

Background

In the oil drilling and production operation, the screen pipe is an important sand control device and is commonly used for early drilling and completion or oil production sand control.

In the well completion process of oil and gas drilling, there is usually a need for running a screen without killing the well, for example, when some sandstone and carbonate rocks with high permeability and good cementation, formations with developed cracks or a large number of communicated holes, formations with low pressure, hard formations, dehydrated formations close to residual oil saturation and the like are operated by using an underbalanced drilling technology, in order to protect oil and gas formations and reduce well leakage and sticking, the snubbing operation is sometimes adopted.

During such snubbing operations, it is often desirable to run tens to hundreds of meters of perforated screens. However, in the process of putting the screen pipe into the well bore, because the screen pipe is communicated with the inside and the outside, a seal cannot be formed at a wellhead device, and fluid in the well bore can enter the screen pipe through screen pipe holes and flow to a drilling platform surface, so that serious safety risks exist, and the screen pipe is not pressed down in the well drilling and completion process, which is always a technical problem in the field.

If in the gas drilling process, in order to solve this problem, a drilling operation company usually installs a set of circulating device at the outlet of a wellhead exhaust pipeline, and under the condition that the pressure of a shaft is not high, for example, when the pressure is lower than the daily output of tens of thousands of square, the gas in the shaft can be pumped by means of the ground circulating pressure difference, so that the gas in the shaft can be prevented from entering a sieve tube, but when the output is higher, for example, when the daily output of tens of thousands of square is even higher, the flow direction of the fluid in the shaft can not be well controlled by pumping, so that the combustible gas can be leaked to a drilling platform surface to generate the explosion risk.

However, at present, the number of high-yield oil and gas wells is increased, the risk of fluid overflowing the sieve tube is increased, the operation of the high-yield well screen tube ring joint without killing the well is severely restricted, and the problems are technical problems to be solved urgently in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems and provides a sieve tube, wherein a soluble plug is used for temporarily plugging a sieve tube hole, and after the screen tube is put into a well, the plug is dissolved, so that the screen tube is unsealed, and the problem that high-pressure fluid overflows when the sieve tube is put into the well is solved.

The technical scheme for solving the technical problems is as follows: the sieve tube comprises a tube body, sieve tube holes communicated with the inside of the tube body are formed in the side wall of the tube body, and fusible plugs are arranged in the sieve tube holes in a sealing mode.

The beneficial effect of the screen pipe that this application discloses is: the utility model discloses a screen pipe keeps sealed at the in-process of going into the pit shaft all the time, and fluid in the pit shaft can't pass through the screen pipe overflow, after the screen pipe to the settlement position and reach the meltdown condition, makes the meltable end cap dissolve, and the deblocking is accomplished to the screen pipe, and the deblocking process need not to carry out extra operation of going into, can not lead to the fact the destruction to the body of screen pipe.

In an alternative embodiment, the fusible plug is a temperature-sensitive fusible plug, a chloride ion solution soluble plug or a high-temperature water-soluble plug.

In an alternative embodiment, the melting point of the temperature-sensitive fusible plug is not higher than the temperature of the position, preset in the well bore, of the sieve tube, the chlorine ion solution soluble plug can be dissolved by chlorine ion solution with the concentration of more than 1.5g/L, and the high-temperature water-soluble plug can be dissolved by water with the temperature of more than 60 ℃.

In an optional embodiment, the temperature-sensitive fusible plug is made of a material with a melting point of 50-200 ℃, the chloride ion solution soluble plug is made of magnesium-based alloy, and the high-temperature water-soluble plug is made of polyglycolic acid plastic.

On the basis, the application also discloses a screen pipe hole sealing experimental device, which comprises a sleeve, wherein the sleeve is internally used for placing a screen pipe,

the sieve tube comprises a tube body, sieve tube holes communicated with the inside of the tube body are formed in the side wall of the tube body, and fusible plugs are arranged in the sieve tube holes in a sealing mode;

when the screen pipe is placed in the sleeve, the pipe body is arranged in the sleeve, the pipe body is communicated with the outside of the sleeve, a sealed and pressurizable fluid space is arranged between the outer side of the screen pipe hole and the sleeve, the screen pipe hole is positioned in the fluid space, and an injection hole which is communicated with the fluid space and can be opened and closed is arranged on the sleeve.

The application discloses screen pipe hole seals experimental apparatus's beneficial effect is: the application discloses screen pipe hole seals experimental apparatus can test shutoff and the deblocking ability of screen pipe effectively.

In an alternative embodiment, the sleeve comprises a heating mechanism for pressurizing the fluid space and/or a pressurizing mechanism for heating the fluid space.

In an optional embodiment, a pressure gauge is detachably connected to the injection hole, a connecting rod penetrating through the sleeve is arranged on the sleeve, and the pipe body is communicated with the outside of the sleeve through the connecting rod.

In an alternative embodiment, the sleeve includes a hollow sleeve body and sleeve covers, the sleeve covers are arranged at two ends of the sleeve body in a sealing mode, and the fluid space is defined between the interior of the sleeve body and the tube body.

In an alternative embodiment, the orifice is located in the sleeve cover at one end of the sleeve body and the connecting rod passes through the sleeve cover at the other end of the sleeve body.

In an alternative embodiment, the cannula cover is removably attached to the cannula body.

In an alternative embodiment, the pressurizing mechanism is a cannula cover movably connected to the cannula body, and the cannula cover movably compresses the fluid space.

Drawings

FIG. 1 is a cross-sectional view of a screen according to example 1 of the present application;

FIG. 2 is a cross-sectional view of a screen hole sealing experimental apparatus in example 2 of the present application;

description of reference numerals:

11. a pipe body; 12. an adapter; 13. a fusible plug; 14. a screen pipe cap;

21. a cannula body; 22. a cannula cover; 23. a pressure gauge; 24. an orifice;

3. a connecting rod;

4. a fluid space.

Detailed Description

The principles and features of this application are described below in conjunction with the drawings and the embodiments, which are set forth to illustrate the application and not to limit the scope of the application.

The following discloses many different embodiments or examples for implementing the subject technology described. While specific examples of one or more arrangements of features are described below to simplify the disclosure, the examples should not be construed as limiting the present disclosure, and a first feature described later in the specification in conjunction with a second feature can include embodiments that are directly related, can also include embodiments that form additional features, and further can include embodiments in which one or more additional intervening features are used to indirectly connect or combine the first and second features to each other so that the first and second features may not be directly related.

Example 1

As shown in fig. 1, the present application discloses an embodiment of a screen pipe, which includes a pipe body 11, where the structure of the pipe body 11 may adopt the structure of the pipe body 11 in the existing screen pipe, and the present application is not limited specifically, where a plurality of screen pipe holes communicated with the inside of the pipe body 11 are formed in the side wall of the pipe body 11, and a fusible plug 13 is hermetically arranged in the screen pipe hole, specifically, the fusible plug 13 may be a temperature-sensitive fusible plug, a chloride ion solution fusible plug, or a high-temperature water-soluble plug, etc.

This application is at the during operation, uses the screen pipe by fusible end cap 13 shutoff to go into the well, because there is fusible end cap 13's existence, and the screen pipe hole is in encapsulated situation in the process of going into the well, and the high-pressure fluid in the pit shaft can't overflow through the screen pipe hole, when the screen pipe is transferred to required position, adopts corresponding means to dissolve/melt fusible end cap 13 that is located on the screen pipe, realizes the quick deblocking of screen pipe hole then.

For convenience of understanding, the application respectively takes the meltable plug as a temperature-sensitive soluble plug, a chloride ion solution soluble plug and a high-temperature water-soluble plug as examples, and respectively explains the working principle.

In the example of using the soluble plug 13 of chloride ion solution, when unsealing is required, chloride ion solution can be injected into the body 11 of the screen pipe, and the soluble plug of chloride ion is dissolved after contacting with the chloride ion solution, so as to quickly realize quick unsealing^-NaCl solution with content over 1.5g/L, Mg-base alloy and Cl^-The solution can be quickly corroded and dissolved after being contacted, and then the purpose of unsealing the holes of the sieve tube is achieved.

In an example that the fusible plug 13 is a temperature-sensitive fusible plug, the temperature-sensitive fusible plug may be made of a temperature-sensitive material, for example, the melting point of the material may be not higher than the temperature of the position, in which the sieve tube is preset, in the wellbore, and the specific melting temperature may be adaptively selected based on the temperature in the wellbore, for example, the temperature of the position, in which the sieve tube is arranged, in the wellbore is usually 50 to 200 ℃, so the fusible plug 13 selected in the present application is a plug having a melting point of 50 to 200 ℃, for example, it may be a temperature-sensitive metal plug, and more specifically, the temperature-sensitive fusible plug may be made of an existing wood alloy having a melting point of 70 ℃.

It should be understood that, specifically, when in use, a plurality of sieve tubes with temperature-sensitive fusible plugs with different melting points can be manufactured in advance, the melting temperature of the temperature-sensitive fusible plugs is changed in a gradient manner, and in an engineering stage, the sieve tube with the temperature-sensitive fusible plugs suitable for the melting temperature is selected for operation according to the required temperature.

In the example of using the screen pipe blocked by the temperature-sensitive fusible plug for well descending, when the screen pipe is lowered to a required position, the temperature of the position in the shaft is higher than the melting point of the fusible plug 13, the fusible plug 13 is melted, the screen pipe hole flow channel is opened, at the moment, the fluid channel in the casing pipe and the fluid channel in the oil pipe are communicated again, and the fluid can smoothly enter the screen pipe, so that the fluid can be produced smoothly.

In addition, the temperature of the temperature-sensitive soluble plug can be set without considering the temperature in the shaft, when the screen pipe is unsealed, hot water or other liquid higher than the melting point of the temperature-sensitive soluble plug can be added into the screen pipe, and the temperature-sensitive soluble plug can be melted after being contacted with the high-temperature liquid, so that the unsealing is realized.

In the example that the melting plug 13 is a high-temperature water-soluble plug, when deblocking is required, clear water with a certain temperature can be injected into the pipe body 11 of the sieve pipe, the high-temperature water-soluble plug is dissolved after being contacted with the clear water with the temperature, and rapid deblocking can be quickly achieved, the high-temperature water-soluble plug can be but is not limited to a PGA (poly glycolic acid) material, clear water with the temperature of 60-90 ℃ can be used when deblocking, and PGA can be dissolved quickly after being contacted with warm water, so that the purpose of deblocking the sieve pipe hole is achieved.

It should be understood that the fusible plug 13 may be disposed in the screen hole by using a connection manner such as hot melting or screwing, based on different materials, and the application is not limited in particular.

Example 2

As shown in fig. 2, the present application further provides an embodiment of a screen hole sealing experimental apparatus, which can be used for testing the sealing property, pressure resistance and unsealing property of the fusible plug 13, and specifically comprises a casing in which the screen is placed.

Wherein, a sealed cavity is arranged in the sleeve, the tube body 11 of the sieve tube is arranged in the sleeve, a connecting rod 3 is inserted on the sleeve, a flow passage is arranged in the connecting rod 3, one end of the flow passage is communicated with the outside of the sleeve, the other end is positioned in the sleeve, when the tube body of the sieve tube is placed in the sleeve, one end of the tube body 11 is sealed, the other end is only communicated with the connecting rod 3, thereby the tube body 11 is communicated with the outside of the sleeve, a sealing gap capable of pressurizing is arranged between the outer side wall of the tube body 11 and the sleeve, the gap is defined as a fluid space 4, the sieve tube hole is positioned in the fluid space 4, the pressurizing of the fluid space 4 can be realized by a pressurizing mechanism or heating, for example, the sleeve is also provided with a pressurizing mechanism for pressurizing the fluid space 4, the pressurizing mechanism can be a piston arranged in the sleeve, or a high pressure air pump or a high pressure water pump communicated with the inside of the sleeve, all can be applicable to this application to the inside mechanism or the structure that pressurizes of sleeve pipe, in another kind of example, be provided with heating mechanism on the sleeve pipe, for example, this heating mechanism can be for the heating jacket of detachable parcel in the sleeve pipe main part 21 outside etc. through heating above-mentioned fluid space 4, borrow by the principle of expend with heat and contract with cold, and then the pressure boost to fluid space.

In a specific example, the casing includes a casing main body 21, the casing main body 21 is a cylindrical sleeve structure, casing covers 22 for sealing the inside of the casing main body 21 are installed at the upper and lower ends of the casing main body 21, the inside of the casing main body 21 is used for accommodating the tubular body 11 of the screen pipe, and the diameter of the tubular body 11 of the screen pipe is smaller than the inner diameter of the casing main body 21, so that when the tubular body 11 is placed in the casing main body 21, a closed annular space can be formed between the inside of the casing main body 21 and the outside of the tubular body 11 of the screen pipe, and the annular space is the fluid space 4.

In order to place the pipe body 11 of the screen pipe into the casing, the casing cover 22 is detachably connected to the casing main body 21, and more preferably, the casing cover 22 can be used as a pressurizing mechanism, the casing cover 22 can be movably connected to the casing main body 21, the casing cover 22 can pressurize the fluid space 4 through the movable compressible fluid space 4, for example, the casing cover 22 can be connected to two ends of the casing main body 21 in a sealing and threaded manner, in use, the casing cover 22 can be connected to the casing main body 21, some rotation allowance is reserved, and when pressurization is needed, the casing cover 22 is screwed to move towards the casing main body 21, so that the effect of compressing the fluid space 4 can be achieved.

In addition, in some examples, in order to realize the sealing of the pipe body of the sieve pipe in the sleeve, a sealed sieve pipe cap 14 is detachably mounted at one end of the pipe body 11 of the sieve pipe, an adapter 12 is detachably and hermetically connected at the other end of the pipe body 11, a hole is formed in the adapter 12 to communicate with the inside of the connecting rod, and the pipe body 11 is connected with the connecting rod 3 through the adapter 12, for example, both the sieve pipe cap 14 and the adapter 12 can be matched with the pipe body 11 in a threaded connection manner, wherein one end of the connecting rod 3, which is far away from the pipe body 11, penetrates through a sleeve cover 22, which is close to the connecting rod, so that the inside of the pipe body 11 is communicated with the outside of the sleeve main body 21, an injection hole 24 communicated with the fluid space 4 is formed in the sleeve cover 22 at the other end of the sleeve main body 21, an internal thread is formed in the injection hole 24, and a pressure gauge 23 is in threaded connection with the injection hole 24.

The working process of the sieve tube hole sealing experimental device is as follows: firstly, place the body 11 of screen pipe in sleeve pipe main part 21 and be connected with adapter 12, make body 11 pass through connecting rod 3 and the outside intercommunication of sleeve pipe main part 21, at this moment, the inside and fluid space 4 wall of body 11, then, keep away from connecting rod 3 one end at sleeve pipe main part 21 and cover casing 22, fill test fluid in fluid space 4 through above-mentioned injection hole 24, and seal injection hole 24 through manometer 23, then pressurize fluid space 4 gradually, through observing whether connecting rod 3 leaks and manometer 23 pressure, thereby test the sealed and pressure-bearing effect of fusible end cap 13.

It should be understood that the above-mentioned pressurizing mechanism and heating mechanism may be present independently or simultaneously, wherein in the embodiment provided with the heating mechanism, the deblocking performance of the temperature-sensitive fusible plug and the high-temperature water-soluble plug may also be tested by a heater. In addition, the chloride ion solution or warm water can be injected into the orifice 24, and then the deblocking performance of the chloride ion solution soluble plug and the high-temperature water-soluble plug can be tested.

For convenience of understanding, the present application is described in terms of working principles of testing the unsealing capabilities of three plugs, respectively:

when the deblocking capability of the temperature-sensitive soluble plug is tested, the fluid space 4 can be heated through the heating mechanism until the temperature in the fluid space 4 reaches the melting temperature of the temperature-sensitive soluble plug, and the pressure of the pressure gauge 23 is observed at the moment, so that whether the sieve tube is deblocked or not can be known.

When the deblocking capacity of the high-temperature water-soluble plug is tested, the method can be adopted, in addition, warm water which can dissolve the high-temperature water-soluble plug dissolving condition can be directly added through the injection hole 24, the warm water is contacted with the high-temperature water-soluble plug after entering the fluid space 4, if the high-temperature water-soluble plug is dissolved, the warm water can flow into the pipe body 11 of the sieve pipe, and at the moment, whether the connecting rod is discharged or not can be observed, so that whether the sieve pipe is deblocked or not can be known.

Similarly, when testing the soluble end cap deblocking ability of chloride ion, can directly add chloride ion solution through orifice 24, then observe whether the connecting rod goes out water, can know whether the screen pipe deblocking.

The screen pipe disclosed in this application keeps sealed all the time at the in-process of going into the pit shaft, and at this moment, the fluid in the pit shaft can't pass through the screen pipe overflow, and when the screen pipe arrived required position, pour into chloride ion solution or borrow the temperature in the pit shaft into in the pit shaft, realizes the automatic deblocking of screen pipe, and this application need not to take extra operation measure, can not lead to the fact the destruction to the body 11 of screen pipe.

The application discloses screen pipe hole seals experimental apparatus can test shutoff and the deblocking ability of screen pipe effectively.

In the description of the present specification, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present specification.

In the description of the present specification, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The terms used in the present specification are those general terms currently widely used in the art in consideration of functions related to the present disclosure, but they may be changed according to the intention of a person having ordinary skill in the art, precedent, or new technology in the art. Also, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the specification should not be construed as simple names but based on the meanings of the terms and the overall description of the present disclosure.

Flowcharts or text are used in this specification to illustrate the operational steps performed in accordance with embodiments of the present application. It should be understood that the operational steps in the embodiments of the present application are not necessarily performed in the exact order recited. Rather, the various steps may be processed in reverse order or simultaneously, as desired. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The sieve tube is characterized by comprising a tube body, sieve tube holes communicated with the inside of the tube body are formed in the side wall of the tube body, and fusible plugs are arranged in the sieve tube holes in a sealing mode.

2. The screen according to claim 1, wherein the fusible plug is a chloride solution soluble plug, a temperature sensitive fusible plug, or a high temperature water soluble plug.

3. The screen according to claim 2, wherein the chloride soluble plug is soluble in chloride solution with a concentration greater than 1.5g/L, the temperature sensitive fusible plug has a melting point no higher than a temperature at which the screen is pre-positioned in the wellbore, and the high temperature water soluble plug is soluble in water at a temperature of 60 ℃ or higher.

4. The screen pipe as claimed in claim 3, wherein the chloride solution soluble plugs are magnesium-based alloy, the temperature-sensitive fusible plugs are made of material with melting point of 50-200 ℃, and the high-temperature water-soluble plugs are polyglycolic acid plastic.

5. The screen pipe hole sealing experimental device is characterized by comprising a sleeve, wherein a screen pipe is placed in the sleeve,

6. The experimental device for screen hole sealing as claimed in claim 5, wherein the fusible plug is a chloride ion solution soluble plug, a temperature-sensitive fusible plug or a high-temperature water-soluble plug.

7. The screen hole sealing experimental apparatus according to claim 5, wherein the sleeve includes a heating mechanism and/or a pressurizing mechanism, the pressurizing mechanism is used for pressurizing the fluid space, and the heating mechanism is used for heating the fluid space.

8. The screen hole sealing experimental device according to claim 7, wherein a detachable pressure gauge is connected to the injection hole, a connecting rod is arranged on the sleeve and penetrates through the sleeve, and the pipe body is communicated with the outside of the sleeve through the connecting rod.

9. The screen hole seal testing apparatus of claim 8, wherein the casing comprises a hollow casing body and casing covers, the casing covers are arranged at two ends of the casing body in a sealing manner, and the fluid space is defined between the inside of the casing body and the pipe body.

10. The screen hole seal testing apparatus of claim 9, wherein the casing cover is removably attached to the casing body, the pressurizing mechanism is a casing cover, the casing cover is removably attached to the casing body, and the casing cover is movable to compress the fluid space.