A switchable screen tube

Abstract

The present invention discloses a switchable screen pipe, which relates to the technical field of oil and gas production equipment, and achieves the purpose of opening or closing the production channel according to demand. The main technical scheme of the present invention is: comprising: an oil pipe, the oil pipe is formed with a production channel, and a valve port is formed on the wall of the oil pipe; a filter layer, the filter layer is sleeved on the outer surface of the oil pipe, a flow gap is formed between the filter layer and the outer surface of the oil pipe, and a sealed conveying channel is formed between the flow gap and the valve port; a sliding sleeve, the sliding sleeve is arranged on the inner wall of the oil pipe, the sliding sleeve is slidably connected with the inner wall of the oil pipe, a clamping part is arranged on the sliding sleeve, and a first docking part and a second docking part are arranged in sequence along the length direction of the oil pipe on the inner wall of the oil pipe, and the first docking part and the second docking part are both used to be clamped with the clamping part, when the clamping part is clamped with the first docking part, the sliding sleeve is sealed at the valve port, and when the clamping part is clamped with the second docking part, the sliding sleeve opens the valve port.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas production equipment, and in particular to a switchable screen pipe. Background Art

[0002] Sand control screens are widely used in the construction of oil wells, gas wells, and water mirrors in oil and gas fields. During construction, the construction pipe string needs to be connected to the sand control screen tool, and the liquid and gas enter the production channel after being filtered through the sand control screen. However, with the development of petroleum industry technology, this type of sand control tool can no longer solve the problems currently faced by the oil and gas industry. For oil fields, as the output of formation water increases, the oil production will decrease, and in the case of high water content, the cost of later oil and water treatment will increase. The formation water of oil wells is advancing, and conventional sand control screens cannot close a certain layer according to production or operation requirements to prevent formation water from entering the oil production channel. Therefore, how to close the sand control screen is a technical problem that technicians in this field urgently need to solve. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a switchable screen pipe, the main purpose of which is to close the production channel as needed.

[0004] The embodiment of the present invention provides a switchable screen pipe, which includes: an oil pipe, the oil pipe is formed with a production channel, and a valve port is formed on the wall of the oil pipe;

[0005] A filter layer, wherein the filter layer is sleeved on the outer surface of the oil pipe, a flow gap is formed between the filter layer and the outer surface of the oil pipe, and a sealed delivery channel is formed between the flow gap and the valve port;

[0006] A sliding sleeve, wherein the sliding sleeve is arranged on the inner wall of the oil pipe, the sliding sleeve is slidably connected to the inner wall of the oil pipe, a clamping portion is arranged on the sliding sleeve, and a first docking portion and a second docking portion are arranged in sequence along the length direction of the oil pipe on the inner wall of the oil pipe, the first docking portion and the second docking portion are both used to be clamped with the clamping portion, when the clamping portion is clamped with the first docking portion, the sliding sleeve is sealed to the valve port, and when the clamping portion is clamped with the second docking portion, the sliding sleeve opens the valve port.

[0007] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0008] Specifically, the clamping portion is one of an elastic protrusion and a clamping groove, and the first docking portion and the second docking portion are both the other of the elastic protrusion and the clamping groove.

[0009] Specifically, it also includes a deformation groove, which includes a groove bottom and a groove wall that are connected to each other, the elastic protrusion is arranged on the groove bottom, a deformation space is formed between the elastic protrusion and the groove wall, and the elastic protrusion and the deformation groove are jointly arranged on the outer wall of the sliding sleeve or the inner wall of the oil pipe.

[0010] Specifically, a receiving groove is formed on the outer surface of the sliding sleeve and surrounds the sliding sleeve, and a sealing member is formed in the receiving groove.

[0011] Specifically, a clamping platform is formed on the inner surface of the sliding sleeve.

[0012] Specifically, it also includes: a transition joint and an outer shell,

[0013] The oil pipe comprises a first connecting pipe and a second connecting pipe, the filter layer is sleeved on the outer surface of the second connecting pipe, and the sliding sleeve is sleeved inside the first connecting pipe.

[0014] The transition joint comprises a first section and a second section, wherein the first section is detachably sleeved on the outer surface of the first connecting pipe, and the second section is detachably sleeved on the outer surface of the end of the second connecting pipe.

[0015] A flow groove is formed on the outer surface of the first section along its length direction, and a first through hole is formed on the tube wall of the second section along its length direction, the first through hole is connected to the flow groove; the side of the first through hole away from the flow groove is connected to the flow gap;

[0016] The first connecting pipe includes a third section and a fourth section, the outer diameter of the third section is smaller than the outer diameter of the fourth section, the valve port is located in the third section, one end of the outer shell is sleeved on the outer surface of the third section and extends to the outer surface of the fourth section, the outer surface of the third section and the inner wall of the outer shell form a first conveying channel, the other end of the outer shell is sleeved on the outer surface of the first section and extends to the second section, and is sealed and connected to the second section, the inner surface of the outer shell and the flow groove form a second conveying channel, and the first conveying channel and the second conveying channel are connected to each other to form the conveying channel.

[0017] Specifically, a buffer section is formed between the first section and the second section, and the buffer section is formed with a buffer groove surrounding the buffer section. The buffer groove includes a side wall and a bottom wall and a buffer space surrounded by the side wall and the bottom wall. The first through hole extends to the side wall, and the flow groove is connected to the buffer space.

[0018] Specifically, it also includes a tracer tube,

[0019] The oil pipe further includes a third connecting pipe, the tracer pipe is sleeved on the outer surface of the third connecting pipe, and a receiving space is formed along the length direction of the tracer pipe, one end of the receiving space is connected to the flow gap, and the other end is connected to the first through hole, and the receiving space contains a tracer;

[0020] The third connecting pipe includes a first connecting end and a second connecting end, the second section of the transition joint is used to be detachably mounted on the outer surface of the first connecting end, the second connecting end is used to be detachably mounted on the outer surface of the end of the second connecting pipe, the second connecting end of the third connecting pipe is used to be mounted on the first connecting end of another third connecting pipe, and one end of the accommodating space close to the flow gap is used to communicate with one end of the other accommodating space close to the first through hole.

[0021] Specifically, the tracer tube includes an inner sleeve and an outer sleeve, the inner sleeve includes a first end and a second end opposite to each other, the outer sleeve includes a third end and a fourth end opposite to each other, the first end is connected to the third end and a first slit opening is formed, the second end is connected to the fourth end and a second slit opening is formed, the accommodating space is formed between the inner sleeve and the outer sleeve, the first slit opening and the second slit opening are both connected to the accommodating space, the first slit opening is connected to the flow gap, and the second slit opening is connected to the first through hole.

[0022] Specifically, the filter layer includes a support ring, a transition ring and a filter sleeve, the support ring and the transition ring are respectively arranged at two ends of the filter sleeve, the support ring and the transition ring are sleeved on the outer surface of the second connecting tube, and the filter sleeve support value is preset at a height to form a flow gap, and a third channel is arranged on the transition ring, and the third channel is connected to the first slit opening.

[0023] The embodiment of the present invention proposes a switchable screen pipe, wherein the sliding sleeve is arranged on the inner wall of the oil pipe, and can slide along the inner wall of the oil pipe. When the clamping part of the sliding sleeve is clamped with the first docking part, the sliding sleeve can close the valve port. When the sliding sleeve slides to the second docking part, the clamping part is clamped with the second docking part, and the sliding sleeve opens the valve port. The sliding sleeve can achieve the effect of opening or closing the valve port. If there is a construction demand or the toe effect caused by the penetration fluid (mainly water and gas) in the production layer leads to a significant reduction in oil and gas production, this product can close the production channel of the production layer through the switch tool, and can also open the production channel of the production layer again according to actual needs.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a switchable screen tube provided in an embodiment of the present invention;

[0026] Figure 2 Another structural schematic diagram of a switchable screen tube provided by an embodiment of the present invention;

[0027] Figure 3 Another structural schematic diagram of a switchable screen tube provided by an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of a sliding sleeve structure of a switchable screen pipe provided in an embodiment of the present invention;

[0029] Figure 5 Another structural schematic diagram of a switchable screen tube provided by an embodiment of the present invention;

[0030] Figure 6 Another structural schematic diagram of a switchable screen tube provided by an embodiment of the present invention;

[0031] Figure 7 A schematic diagram of a transition joint structure of a switchable screen pipe provided in an embodiment of the present invention;

[0032] Figure 8 A schematic diagram of the structure of a third connecting pipe of a switchable screen pipe provided in an embodiment of the present invention;

[0033] Fig. 9 A schematic diagram of the first end ring structure of a switchable screen pipe provided in an embodiment of the present invention;

[0034] Fig.10 A schematic diagram of the second end ring structure of a switchable screen pipe provided in an embodiment of the present invention;

[0035] Fig.11 A schematic diagram of a transition ring structure of a switchable screen tube provided in an embodiment of the present invention.

[0036] Description of Figure Numbers:

[0037] 1-oil pipe, 11-valve port, 12-first docking portion, 13-second docking portion, 14-clamping groove, 15-first connecting pipe, 16-second connecting pipe, 161-connecting portion, 162-functional portion, 17-third connecting pipe, 171-first connecting end, 172-second connecting end, 1721-second through hole, 173-transition zone, 2-filter layer, 21-support ring, 22-transition ring, 221-third channel, 23-filter sleeve, 24-circulation gap, 3-sliding sleeve, 31-elastic protrusion, 32-deformation groove, 33-accommodating groove, 34-sealing member, 35-clamping platform, 4-transition joint, 41-first section, 411-circulation groove, 42-second section, 421-first through hole, 43-buffer section, 431-buffer groove, 5-outer shell, 6-tracer tube, 61-inner sleeve, 62-outer sleeve, 63-first end ring, 631-first slit opening, 64-second end ring, 641-second slit opening, 7-valve core, 8-upper joint. DETAILED DESCRIPTION

[0038] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the switchable screen tube proposed in accordance with the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0039] like Figures 1 to 11As shown, an embodiment of the present invention provides a switchable screen pipe, which includes: an oil pipe 1, the oil pipe 1 is formed with a production channel, and a valve port 11 is formed on the pipe wall of the oil pipe 1; a filter layer 2, the filter layer 2 is sleeved on the outer surface of the oil pipe 1, a flow gap 24 is formed between the filter layer 2 and the outer surface of the oil pipe 1, and a sealed conveying channel is formed between the flow gap 24 and the valve port 11; a sliding sleeve 3, the sliding sleeve 3 is arranged on the inner wall of the oil pipe 1, the sliding sleeve 3 is slidably connected with the inner wall of the oil pipe 1, a clamping portion is arranged on the sliding sleeve 3, and a first docking portion 12 and a second docking portion 13 arranged in sequence along the length direction of the oil pipe 1 are arranged on the inner wall of the oil pipe 1, the first docking portion 12 and the second docking portion 13 are both used for clamping with the clamping portion, when the clamping portion is clamped with the first docking portion 12, the sliding sleeve 3 is sealed at the valve port 11, and when the clamping portion is clamped with the second docking portion 13, the sliding sleeve 3 opens the valve port 11. This embodiment can be used for oilfield sand prevention and water control construction operations, as for the bottom section of the wellbore tubing string. Among them, the filter layer 2 plays the role of filtering the formation sand. After passing through the filter layer 2, the fluid enters the flow gap 24, and then passes through the conveying channel to reach the valve port 11. When the valve port 11 is opened, the fluid enters the production channel in the oil pipe 1. When the valve port 11 is closed, the fluid cannot enter the production channel of the oil pipe 1. The valve port 11 can connect the conveying channel and the production channel. The oil pipe 1 is sleeved on the outer surface of the sleeve 3, and the sleeve 3 can slide along the inner surface of the oil pipe 1. A clamping part is provided on the inner surface of the sleeve 3, and a first docking part 12 and a second docking part 13 are provided on the inner wall of the oil pipe 1. When the sleeve 3 is in the first position, the clamping part of the sleeve 3 is clamped with the first docking part 12, such as Figure 2 As shown, at this time, the sliding sleeve 3 can completely seal and close the valve port 11, so that the valve port 11 no longer flows with liquid. When the sliding sleeve 3 slides to the second position, as shown in FIG. Figure 3 As shown, the clamping part of the sleeve 3 is clamped with the second docking part, and the sleeve 3 cannot block the valve port 11, so that the valve port 11 is open and the fluid continues to enter the production channel from the valve port 11. The sleeve 3 can achieve the effect of opening or closing the valve port 11. If there is a construction demand or the infiltration fluid (mainly water and gas) of the production layer breaks through to produce a toe effect, resulting in a significant reduction in oil and gas production, this product can close the production channel of the production layer through a switch tool, and can also open the production channel of the production layer again according to actual needs.

[0040] Specifically, the clamping portion is one of the elastic protrusion 31 or the clamping groove 14, and the first docking portion 12 and the second docking portion 13 are both the other of the elastic protrusion 31 or the clamping groove 14. The first docking portion 12 is the same as the second docking portion 13, and the first docking portion 12 and the second docking portion 13 are collectively referred to as docking portions. When the first docking portion 12 and the second docking portion 13 are the elastic protrusion 31, that is, the elastic protrusion 31 is arranged on the inner wall of the oil pipe 1, and the clamping portion is the clamping groove 14, that is, the clamping groove 14 is arranged on the outer wall of the sliding sleeve 3, the elastic protrusion 31 can be clamped in the clamping groove 14, and when the sliding sleeve 3 slides along the inner wall of the oil pipe 1, when the sliding sleeve 3 moves from the first position to the second position, firstly, an outer force along the first direction is applied to the sliding sleeve 3. The force causes the sleeve 3 to move along the first direction, wherein the first direction is from the first position to the second position, and the direction indicated by arrow A is the first direction. After the external force is applied to the sleeve 3, the elastic protrusion 31 is squeezed and deformed in the first direction. When the deformation reaches a certain value, the elastic protrusion 31 loses its function of limiting the sleeve 3, and the elastic protrusion 31 is separated from the engaging groove 14. The sleeve 3 slides along the inner wall of the oil pipe 1 to the second position, and the elastic protrusion 31 is engaged with the engaging groove 14 of the second docking portion 13, so that the valve port 11 is in an open state. Another embodiment is: Figure 2 and Figure 3 As shown, when the clamping part is an elastic protrusion 31 and the docking part is a clamping groove 14, the elastic protrusion 31 is arranged on the outer wall of the sleeve 3. When the sleeve 3 moves from the first position to the second position, the sleeve 3 is subjected to an external force in the first direction, and the elastic protrusion 31 is subjected to an extrusion force away from the first direction. When the deformation of the elastic protrusion 31 reaches a certain value, the elastic protrusion 31 can no longer limit the sleeve 3, and the sleeve 3 starts to slide toward the second docking part. Setting the clamping part or the docking part as an elastic component can facilitate the sliding of the sleeve 3.

[0041] Specifically, Figure 2 and Figure 3As shown, the deformation groove 32 is also included. The deformation groove 32 includes a groove bottom and a groove wall connected to each other. The elastic protrusion 31 is arranged on the groove bottom. A deformation space is formed between the elastic protrusion 31 and the groove wall. The elastic protrusion 31 and the deformation groove 32 are jointly arranged on the outer wall of the sliding sleeve 3 or the inner wall of the oil pipe 1. When the elastic protrusion 31 is arranged on the outer wall of the sliding sleeve 3, the deformation groove 32 is also arranged on the outer wall of the sliding sleeve 3. When the elastic protrusion 31 is arranged on the inner wall of the oil pipe 1, the deformation groove 32 is also arranged on the inner wall of the oil pipe 1, and the two are arranged on the same component. The deformation groove 32 is sunken into the surface of the component where it is located. When the elastic protrusion 31 is deformed, the end of the elastic protrusion 31 away from the groove bottom moves toward the deformation space. The sleeve 3 moves along the inner wall of the oil pipe 1, so when the position of the oil pipe 1 changes, the pressure on the elastic protrusion 31 is also along the length direction of the oil pipe 1, so when the elastic protrusion 31 is deformed, it is also along the length direction of the oil pipe 1, or the deformation of the elastic protrusion 31 along the length direction is the largest. Therefore, the deformation groove 32 can be set to a strip shape, the length direction of which is the same as the length direction of the oil pipe 1, and the elastic protrusion 31 is set in the central area of ​​the groove bottom of the deformation groove 32. In addition, the groove walls around the groove bottom can also form a deformation space between the elastic protrusion 31.

[0042] Among them, Figure 4 As shown, there are multiple clamping parts, and they are evenly arranged around the sleeve 3, so that each elastic protrusion 31 is evenly stressed. Correspondingly, there are multiple first docking parts 12, and there are multiple second docking parts 13. Both are arranged around the inner wall of the oil pipe 1, or the first docking part 12 and the second docking part 13 are both arranged around the outer wall of the sleeve 3.

[0043] Specifically, Figure 4 As shown, a receiving groove 33 is formed on the outer surface of the sleeve 3 and surrounds the sleeve 3, and a sealing member 34 is formed in the receiving groove 33. The receiving groove 33 surrounds the sleeve 3, and the number of the receiving grooves 33 can be multiple, and the multiple receiving grooves 33 are arranged along the length direction of the sleeve 3, or the receiving groove 33 spirally surrounds the outer wall of the sleeve 3. The sealing member 34 is formed in the receiving groove 33, so that the outer surface of the sleeve 3 is sealed and connected with the inner surface of the oil pipe 1, so as to prevent the fluid from entering the production channel along the gap between the sleeve 3 and the oil pipe 1 when the valve is closed. The sealing member 34 can be a vulcanized rubber ring, which is sealed and connected with the oil pipe 1 through the vulcanized rubber ring, and the vulcanized rubber ring is vulcanized in the receiving groove 33. The cross-sectional area of ​​the receiving groove 33 gradually decreases along the direction away from the central axis of the sleeve 3, that is, the receiving groove 33 is in a gradually tightened shape, so as to prevent the vulcanized rubber ring from leaking out when the vulcanized rubber ring is vulcanized, so that the connection between the sealing member 34 and the receiving groove 33 is more reliable.

[0044] Specifically, Figure 2 , Figure 3 and Figure 4 As shown, a clamping platform 35 is formed on the inner surface of the sleeve 3. When the sleeve 3 is moved, external force is required. The staff lowers the tool from the pipeline into the sleeve 3. When the tool is clamped on the clamping platform 35, the staff pulls or pushes the sleeve 3 with force, so that the sleeve 3 moves along the inner surface of the oil pipe 1. Specifically, a groove can be formed on the inner surface of the sleeve, and both opposite ends of the groove along the length direction of the sleeve can be the clamping platforms 35. When the sleeve is pushed or pulled, the tool is clamped on the clamping platforms 35 at different positions.

[0045] Specifically, Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, it also includes: a transition joint 4 and an outer shell 5, the oil pipe 1 includes a first connecting pipe 15 and a second connecting pipe 16, the filter layer 2 is sleeved on the outer surface of the second connecting pipe 16, the sliding sleeve 3 is sleeved in the first connecting pipe 15, the transition joint 4 includes a first section 41 and a second section 42, the first section 41 is sleeved on the outer surface of the first connecting pipe 15, and the second section 42 is used to be detachably sleeved on the outer surface of the end of the second connecting pipe 16, as shown in FIG. Figure 7 As shown, a flow groove 411 is formed on the outer surface of the first section 41 along its length direction, and a first through hole 421 is formed on the tube wall of the second section 42 along its length direction, and the first through hole 421 is connected to the flow groove 411; Figure 6 As shown, the side of the first through hole 421 away from the flow groove 411 is connected to the flow gap 24; the first connecting pipe 15 includes three sections 151 and a fourth section 152, the valve port 11 is located in the third section 151, one end of the outer shell 5 is sleeved on the outer surface of the third section 151 and extends to the outer surface of the fourth section 152, the outer surface of the third section 151 and the inner wall of the outer shell 5 form a first conveying channel, the other end of the outer shell 5 is sleeved on the outer surface of the first section 41 and extends to the second section 42, and is sealed and connected to the second section 42, the inner surface of the outer shell 5 and the flow groove 411 form a second conveying channel, and the first conveying channel and the second conveying channel are connected to each other to form a conveying channel.

[0046] The transition joint 4 is used to connect the first connecting pipe 15 and the second connecting pipe 16. The first section 41 is connected to the outer surface of the first connecting pipe 15 by threads, and the second section 42 is connected to the outer surface of the second connecting pipe 16 by threads. The second connecting pipe 16 includes a connecting portion 161 and a functional portion 162. The outer surface of the connecting portion 161 is provided with threads. The cross-sectional area of ​​the outer surface of the functional portion 162 gradually decreases along the direction from the second connecting pipe 16 to the first connecting pipe 15. The filter layer 2 is arranged on the outer surface of the functional portion 162. The first through hole 421 located in the second section 42 is arranged opposite to the flow gap 24. The fluid enters the first through hole 421 after passing through the flow gap 24, and flows into the flow groove 411 from the first through hole 421. A second delivery channel is formed between the flow groove 411 and the outer shell 5 to deliver the fluid to the first delivery channel and then enter the valve port 11. The outer shell 5 is sealed and connected to the second section 42 by a sealing ring. The outer shell 5 is also sealed and connected to the outer surface of the first connecting pipe 15 by a sealing ring. Figure 6 As shown, the valve port 11 is in the coverage area of ​​the outer shell 5, the first section 41 does not extend to the valve port 11, and the first section 41 is set to extend to the third position of the first connecting pipe 15, and the outer shell 5 extends to the fourth position of the first connecting pipe 15. The valve port 11 is between the third position and the fourth position, the third position is located in the third section 151, and the fourth position is located in the fourth section 152. The third section 151 is adjacent to the second connecting pipe. The area between the third position and the fourth position of the first connecting pipe 15 is covered by the outer shell 5. The outer diameter of the third section 151 is smaller than the outer diameter of the fourth section 152, and a stepped outer surface is formed between the two. There is a gap between the inner surface of the outer shell 5 and the third section 151, thereby forming a first delivery channel. Among them, there are multiple first through holes 421, and they are arranged along the circumference of the second section 42, around the first section 41. There are multiple flow grooves 411, and the multiple flow grooves 411 are around the first section 41. The flow grooves 411 can be rectangular grooves. Among them, the first section 41 is sealed and connected with the first connecting pipe 15 through a sealing ring.

[0047] Specifically, Figures 5 to 7As shown, a buffer section 43 is formed between the first section 41 and the second section 42, and a buffer groove 431 is formed around the buffer section 43. The buffer groove 431 includes a side wall and a bottom wall and a buffer space surrounded by the side wall and the bottom wall. The first through hole 421 extends to the side wall, and the groove is connected to the buffer space. The bottom wall of the buffer groove 431 should be lower than the location of the first through hole 421, so that the fluid can enter the buffer groove 431 conveniently. After passing through the buffer groove 431, the fluid enters the circulation groove 411. The depth of the buffer groove 431 is greater than the flow groove. It can be arranged around the buffer section 43 to form an annular groove. After the fluid passes through the buffer groove 431, it can be buffered, so that the fluid can evenly enter each flow groove. The outer shell 5 covers the buffer groove 431, and a buffer space is formed between the outer shell 5 and the buffer groove 431.

[0048] Specifically, Figure 5As shown, it also includes a tracer tube 6, and the oil pipe 1 also includes a third connecting tube 17. The tracer tube 6 is sleeved on the outer surface of the third connecting tube 17, and an accommodating space is formed along the length direction of the tracer tube 6. One end of the accommodating space is connected to the flow gap 24, and the other end is connected to the first through hole 421. The accommodating space contains a tracer; the third connecting tube 17 includes a first connecting end 171 and a second connecting end 172, the second section 42 of the transition joint 4 is used to be detachably sleeved on the outer surface of the first connecting end 171, and the second connecting end 172 is used to be detachably sleeved on the outer surface of the end of the second connecting tube 16, and the second connecting end 172 of the third connecting tube 17 is used to be sleeved on the first connecting end 171 of another third connecting tube 17, and one end of the accommodating space close to the flow gap 24 is used to be connected with one end of another accommodating space close to the first through hole 421. The tracer tube 6 contains a tracer. After the fluid enters the containing space through the circulation gap 24, water, oil, and gas come into contact with the tracer, and the tracer releases its own unique compounds. The formation fluid carries the tracer compound to the ground. Through detection and analysis, it can be determined whether the oil production profile is uniform; the formation water production position, water production time, and the contribution rate of oil, water, and gas in the corresponding formation can also be determined. In this way, the reservoir data of oil, water, and gas wells are obtained, providing effective data support for the improvement of later drilling and completion plans. The outer surface of the first connecting end 171 of the third connecting tube 17 is provided with a thread, which is threadedly connected to the second section 42, and the inner surface of the second connecting end 172 is provided with a thread, which is threadedly connected to the outer surface of the second connecting end 172. The third connecting tube 17 and the tracer tube 6 installed on the third connecting tube 17 are detachably connected to the first connecting tube 15 and the second connecting tube 16. It can be determined whether to install the third connecting tube 17 and the tracer tube 6 according to the characteristics of the oil layer. At the same time, since the second connecting end 172 of the third connecting tube 17 can be detachably mounted on the first connecting end 171 of another third connecting tube 17, and at the same time, one end of the accommodating space close to the flow gap 24 can be connected to one end of the accommodating space of another tracer tube 6 close to the first through hole 421, any two third connecting tubes 17 can be combined together, so the number of tracer tubes 6 and third connecting tubes 17 can be increased as needed.

[0049] Specifically, Figure 5 As shown, the tracer tube 6 includes an inner sleeve 61 and an outer sleeve 62, the inner sleeve 61 includes a first end and a second end opposite to each other, the outer sleeve 62 includes a third end and a fourth end opposite to each other, the first end is connected to the third end, and a first slit opening 631 is formed, the second end is connected to the fourth end, and a second slit opening 641 is formed, and an accommodating space is formed between the inner sleeve 61 and the outer sleeve 62, the first slit opening 631 and the second slit opening 641 are both connected to the accommodating space, the first slit opening 631 is connected to the flow gap, and the second slit opening 641 is connected to the first through hole 421.

[0050] The first end and the third end can be connected through the first end ring 63, the first slit opening 631 is formed on the first end ring 63, the first slit opening 631 gradually decreases along the second direction, the second direction is from the second end to the first end, the second end and the fourth end are connected through the second end ring 64, the second slit opening 641 is formed on the second end ring 64, the second slit opening 641 gradually decreases along the direction away from the second direction. Or the first slit opening 631 and the second slit opening 641 are both smaller than the cross-sectional area of ​​the accommodation space to prevent the tracer from flowing out of the accommodation space. In addition, if Fig. 9 and Fig.10 As shown, the first slit opening 631 and the second slit opening 641 may also include a plurality of sub-openings, which are arranged along the circumferential direction of the first end ring 63 and the second end ring 64. Since the opening area of ​​the sub-openings is small, the tracer may be arranged in a granular, strip, block, etc. shape, which is not limited here. The inner sleeve 61 is sleeved on the outer surface of the third connecting pipe 17, and the inner sleeve 61, the outer sleeve 62, the first end ring 63 and the second end ring 64 are welded, and the inner surface of the first end ring 63 is sealed and connected with the outer surface of the third connecting pipe 17, and a sealing ring may be arranged between the first end ring 63 and the third connecting pipe 17.

[0051] In addition, if Figure 8 As shown, a transition zone 173 is provided between the first connection end 171 and the second connection end 172, and the tracer tube 6 is provided on the outer surface of the transition zone 173. A step surface is formed between the transition zone 173 and the second connection end 172, that is, the cross-sectional area of ​​the outer surface of the second connection end 172 is larger than the cross-sectional area of ​​the outer surface of the transition zone 173. The first end ring 63 is provided opposite to the step surface. At this time, a second through hole 1721 can be provided on the second connection end 172. The second through hole 1721 is provided opposite to the flow gap 24 and is connected with the flow gap 24. The fluid enters the second through hole 1721 through the flow gap 24, then enters the accommodating space through the first slit opening 631, and then enters the first through hole 421 through the second slit opening 641, then enters the flow groove 411, and finally enters the production channel through the valve port 11.

[0052] Specifically, Figure 1 , Figure 5 and Figure 6As shown, the filter layer 2 includes a support ring 21, a transition ring 22 and a filter sleeve 23. The support ring 21 and the transition ring 22 are respectively arranged at the two ends of the filter sleeve 23. The support ring 21 and the transition ring 22 are sleeved on the outer surface of the second connecting tube 16, and the filter sleeve 23 is supported at a preset height to form a flow gap 24. The transition ring 22 is arranged at one end of the filter sleeve 23 close to the tracer tube 6. The transition ring 22 is provided with a third channel 221, and the third channel 221 is connected to the first slit opening 631. The filter sleeve 23 can be a punched sieve tube, a composite sieve tube, a pre-filled sieve tube, etc. When different sieve tubes are used, they can be installed by adjusting the sizes of the support ring 21 and the transition ring 22. Among them, the filter sleeve 23 can be fixedly connected to the support ring 21 and the transition ring by welding, and the transition ring 22 and the support ring 21 can be fixedly connected to the outer surface of the second connecting tube 16 by welding. Among them, as Fig.11 As shown, the third channel 221 can be a groove arranged on the inner wall of the transition ring 22, and the groove is arranged along the thickness direction of the transition ring 22, or the third channel 221 is a through hole, and there are multiple third channels 221, which surround the transition ring 22.

[0053] Specifically, it also includes a valve core 7, which is arranged at the valve port 11. The valve core 7 is used to control the flow rate and flow rate of the fluid. It also includes an upper joint 8, which is detachably connected to the end of the oil pipe 1 away from the filter layer 2, and is used to connect the pipe string.

[0054] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A switchable screen tube, characterized in that: include: An oil pipe, wherein the oil pipe is formed with a production channel, and a valve port is formed on a pipe wall of the oil pipe; A filter layer, wherein the filter layer is sleeved on the outer surface of the oil pipe, a flow gap is formed between the filter layer and the outer surface of the oil pipe, and a sealed delivery channel is formed between the flow gap and the valve port; A sliding sleeve, wherein the sliding sleeve is arranged on the inner wall of the oil pipe, the sliding sleeve is slidably connected with the inner wall of the oil pipe, a clamping portion is arranged on the sliding sleeve, and a first docking portion and a second docking portion are arranged in sequence along the length direction of the oil pipe on the inner wall of the oil pipe, the first docking portion and the second docking portion are both used to be clamped with the clamping portion, when the clamping portion is clamped with the first docking portion, the sliding sleeve is sealed to the valve port, and when the clamping portion is clamped with the second docking portion, the sliding sleeve opens the valve port; Also includes: transition joint and outer shell, The oil pipe comprises a first connecting pipe and a second connecting pipe, the filter layer is sleeved on the outer surface of the second connecting pipe, and the sliding sleeve is sleeved inside the first connecting pipe. The transition joint comprises a first section and a second section, wherein the first section is sleeved on the outer surface of the first connecting pipe, and the second section is used to be detachably sleeved on the outer surface of the end of the second connecting pipe. A flow groove is formed on the outer surface of the first section along its length direction, and a first through hole is formed on the tube wall of the second section along its length direction, the first through hole is connected to the flow groove; the side of the first through hole away from the flow groove is connected to the flow gap; The first connecting pipe includes a third section and a fourth section, the outer diameter of the third section is smaller than the outer diameter of the fourth section, the valve port is located in the third section, one end of the outer shell is sleeved on the outer surface of the third section and extends to the outer surface of the fourth section, the outer surface of the third section and the inner wall of the outer shell form a first conveying channel, the other end of the outer shell is sleeved on the outer surface of the first section and extends to the second section and is sealed and connected to the second section, the inner surface of the outer shell and the flow groove form a second conveying channel, the first conveying channel and the second conveying channel are connected to each other to form the conveying channel; A buffer section is formed between the first section and the second section, the buffer section is formed with a buffer groove surrounding the buffer section, the buffer groove includes a side wall and a bottom wall and a buffer space surrounded by the side wall and the bottom wall, the first through hole extends to the side wall, and the groove is connected to the buffer space; Also includes tracer tubes, The oil pipe further includes a third connecting pipe, the tracer pipe is sleeved on the outer surface of the third connecting pipe, and a receiving space is formed along the length direction of the tracer pipe, one end of the receiving space is connected to the flow gap, and the other end is connected to the first through hole, and the receiving space contains a tracer; The third connecting pipe includes a first connecting end and a second connecting end, the second section of the transition joint is used to be detachably mounted on the outer surface of the first connecting end, the second connecting end is used to be detachably mounted on the outer surface of the end of the second connecting pipe, the second connecting end of the third connecting pipe is used to be mounted on the first connecting end of another third connecting pipe, and one end of the accommodating space close to the flow gap is used to communicate with one end of the other accommodating space close to the first through hole.

2. The switchable screen pipe according to claim 1, characterized in that: The clamping portion is one of an elastic protrusion and a clamping groove, and the first docking portion and the second docking portion are both the other of the elastic protrusion and the clamping groove.

3. The switchable screen pipe according to claim 2, characterized in that: It also includes a deformation groove, which includes a groove bottom and a groove wall connected to each other, the elastic protrusion is arranged on the groove bottom, a deformation space is formed between the elastic protrusion and the groove wall, and the elastic protrusion and the deformation groove are jointly arranged on the outer wall of the sliding sleeve or the inner wall of the oil pipe.

4. The switchable screen pipe according to claim 1, characterized in that: An accommodating groove is formed on the outer surface of the sliding sleeve and surrounds the sliding sleeve, and a sealing member is formed in the accommodating groove.

5. The switchable screen pipe according to claim 4, characterized in that: A clamping platform is formed on the inner surface of the sliding sleeve.

6. The switchable screen pipe according to claim 1, characterized in that: The tracer tube includes an inner sleeve and an outer sleeve, the inner sleeve includes a first end and a second end opposite to each other, the outer sleeve includes a third end and a fourth end opposite to each other, the first end is connected to the third end and a first slit opening is formed therein, the second end is connected to the fourth end and a second slit opening is formed therein, an accommodating space is formed between the inner sleeve and the outer sleeve, the first slit opening and the second slit opening are both connected to the accommodating space, the first slit opening is connected to the flow gap, and the second slit opening is connected to the first through hole.

7. The switchable screen pipe according to claim 6, characterized in that: The filter layer includes a support ring, a transition ring and a filter sleeve. The support ring and the transition ring are respectively arranged at two ends of the filter sleeve. The support ring and the transition ring are sleeved on the outer surface of the second connecting tube and support the filter sleeve to a preset height to form a flow gap. The transition ring is arranged at one end of the filter sleeve close to the tracer tube. A third channel is arranged on the transition ring, and the third channel is connected to the first slit opening.

Images