CN217327261U - Floating well completion sliding sleeve - Google Patents
Floating well completion sliding sleeve Download PDFInfo
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- CN217327261U CN217327261U CN202220470561.8U CN202220470561U CN217327261U CN 217327261 U CN217327261 U CN 217327261U CN 202220470561 U CN202220470561 U CN 202220470561U CN 217327261 U CN217327261 U CN 217327261U
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Abstract
The utility model provides a floating well completion sliding sleeve, which relates to the technical field of oil drilling and comprises a coupling body, a soluble supporting sliding sleeve and an isolating diaphragm; the isolation diaphragm separates coupling body inner space for upper and lower two parts, and soluble support sliding sleeve can dismantle with the coupling body and be connected, and the isolation diaphragm covers in the upper end of soluble support sliding sleeve. Under the action of pumping pressure, the isolating diaphragm deforms and breaks downwards, the soluble supporting sliding sleeve loses the blocking function when being pumped, and the drilling fluid can realize circulation and completely soak the soluble supporting sliding sleeve to dissolve the soluble supporting sliding sleeve; compared with the residual bearing plate in the prior art, the dissolving time of the soluble support sliding sleeve is controllable, and the soluble support sliding sleeve has no residual advantage after being completely soaked and dissolved; special dissolving liquid is not needed, local materials are used for construction, and the method is environment-friendly and harmless.
Description
Technical Field
The utility model relates to an oil drilling technical field particularly, relates to a float well completion sliding sleeve.
Background
In the development process of oil gas such as shale gas, coal bed gas, compact oil gas and the like, large-displacement horizontal drilling and completion are required to be implemented to realize the purposes of increasing the control reserve, increasing the number of fracturing stages, improving the economic productivity and yield of a single well, reducing the number of drilling wells, reducing the ground construction and lowering the total investment. However, when the horizontal drilling and completion are carried out in a large displacement mode, due to the fact that the extension distance of the horizontal section is large, the casing is affected by friction resistance, viscous suction and spiral self-locking force, the conventional casing running depth is limited, the drilling and drilling are caused to encounter reservoir waste and corresponding single well reserve loss, and the expected development economic target cannot be achieved.
In prior art will connect the assembly to aggravate between part and the air floating part in the grout usually, connect the inside fixed pressure-bearing plate that sets up, set up solution package container on the pressure-bearing plate, use the opener to open the solution package, special solution gathers in the central point of pressure-bearing plate after flowing out, dissolve the pressure-bearing plate and pass through the back and all unable further dissolve the pressure-bearing plate after through, dissolve insufficiently and make the pressure-bearing plate remain and form the throat in the joint inside, influence the well cementation plug and pass through.
In summary, the joints in the prior art have at least the following disadvantages:
1. on one hand, special dissolving liquid is needed to dissolve the bearing plate;
2. on the other hand, the pressure bearing plate is short in contact time with the dissolving liquid after being pressed through, and can not be completely dissolved, so that the passing of the well cementation rubber plug is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem be that the bearing plate can't fully dissolve, influence the well cementation plug and pass through.
In order to solve the problem, the utility model provides a float well completion sliding sleeve to provide following technical scheme:
a floating well completion sliding sleeve comprises a coupling body, a soluble supporting sliding sleeve and an isolation diaphragm; the isolation diaphragm divides the inner space of the coupling body into an upper part and a lower part, the soluble support sliding sleeve is detachably assembled in the coupling body, the isolation diaphragm covers the upper surface of the soluble support sliding sleeve, and the isolation diaphragm and the inner cavity surface of the coupling body are in a film-shaped waterproof protection shape.
The utility model provides a float well completion sliding sleeve, the assembly aggravates between part and the air floating part in the grout, when to floating the interior pumping pressure of well completion sliding sleeve, the barrier diaphragm can take place concave deformation under the pressure effect, and then promote soluble supporting sliding sleeve downstream, after soluble supporting sliding sleeve downstream certain distance, the barrier diaphragm loses the support of soluble supporting sliding sleeve, thereby take place to break, at this moment, the solution (drilling mud-non-special solution) of barrier diaphragm top can cross in the barrier diaphragm gets into and is full of the lower part space of coupling body, soluble supporting sliding sleeve soaks and soaks completely in solution and is dissolved fully. Compared with the residual bearing plate in the prior art, the utility model discloses a soluble supporting sliding sleeve can not leave remaining on the inner wall of coupling body after fully dissolving remaining, reaches the effect of full latus rectum, avoids forming the throat on the medial surface of coupling body and influences the well cementation plug and pass through.
Optionally, the floating completion sliding sleeve further comprises a pressure limiting assembly, the pressure limiting assembly is detachably connected with the soluble support sliding sleeve and the coupling body respectively, the isolation diaphragm is arranged above the pressure limiting assembly, and the pressure limiting assembly is made of a drilling fluid soluble material.
Optionally, the pressure limiting assembly includes a soluble supporting tube, the soluble supporting tube is sleeved around the soluble supporting sliding sleeve, the soluble supporting tube is detachably connected to the coupling body and the soluble supporting sliding sleeve, and the isolating membrane covers the upper end of the soluble supporting tube.
Optionally, the soluble support sliding sleeve is nested inside the soluble support tube.
Optionally, the pressure limiting assembly further comprises a soluble connecting member, and the soluble supporting tube is connected with the outer side surface of the soluble supporting sliding sleeve through the soluble connecting member in a pin joint mode.
Optionally, a limiting step is arranged on the inner side surface of the coupling body, and the lower end of the soluble supporting tube is abutted against the limiting step; and/or the diameter of the inner side surface of the soluble supporting pipe is smaller than that of the inner side surface of the coupling body.
Optionally, the floating completion sliding sleeve further comprises a thread installation pressing ring, the thread installation pressing ring is detachably connected with the coupling body, and the isolation diaphragm is clamped between the thread installation pressing ring and the soluble supporting pipe.
Optionally, a pressing ring connecting thread is arranged on the inner side surface of the coupling body, and the thread mounting pressing ring is in threaded connection with the coupling body through the pressing ring connecting thread; and/or the diameter of the inner side surface of the thread mounting compression ring is equal to that of the inner side surface of the coupling body; and/or the inner side surface of the upper end of the coupling body is provided with a coupling upper connecting thread; and/or the outer side surface of the lower end of the coupling body is provided with a coupling lower connecting thread.
Optionally, the outer side surface of the soluble support tube is tightly matched with the inner side surface of the coupling body; and/or the inner side surface of the soluble supporting tube is tightly matched with the outer side surface of the soluble supporting sliding sleeve.
Optionally, the pressure limiting assembly further comprises a soluble sealing element, and the outer side surface of the soluble supporting pipe is in sealing fit with the inner side surface of the coupling body through the soluble sealing element; and/or the inner side surface of the soluble supporting tube is in sealing fit with the outer side surface of the soluble supporting sliding sleeve through the soluble sealing element.
Drawings
Fig. 1 is a schematic structural diagram of a floating completion sliding sleeve in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the floating completion sliding sleeve after the soluble material is dissolved in the embodiment of the present invention;
fig. 3 is a schematic diagram of a floating completion string construction structure according to an embodiment of the present invention.
Description of reference numerals:
100-a collar body; 101-a limit step; 102-compression ring connecting screw threads; 103-connecting threads on the coupling; 104-collar lower connecting threads;
200-a soluble supporting sliding sleeve; 300-an isolation diaphragm;
400-a voltage limiting component; 401-soluble support tube; 402-a soluble linker; 403-dissolvable sealing member;
500-installing a pressure ring in a threaded manner; 600-grouting a weight part; 700-air floating section.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "connected" and "connected," unless expressly specified or limited otherwise, are to be construed broadly and can include, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art. In the embodiments of the present invention, unless otherwise explicitly specified or limited, the first feature may be "on" or "under" the second feature such that the first feature is directly in contact with the second feature or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature. In the description herein, references to the description of the terms "some embodiments," "some embodiments," or "possible embodiments," etc., mean 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 an embodiment of the invention. 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.
As shown in fig. 1, in an embodiment of the present invention, a floating completion sleeve is provided, comprising a coupling body 100, a soluble support sleeve 200 and an isolation diaphragm 300; the isolation diaphragm 300 divides the inner space of the coupling body 100 into an upper part and a lower part, the soluble supporting sliding sleeve 200 is detachably assembled in the coupling body 100, the isolation diaphragm 300 covers the upper surface of the soluble supporting sliding sleeve 200, and the isolation diaphragm 300 and the inner cavity surface of the coupling body 100 are in a film-shaped waterproof protection form; the film-like waterproof protection form includes waterproof connection forms such as film bonding, fixing, and sealing adhesion, and a connection form of film bonding is preferably used.
As shown in fig. 1 and 2, the floating completion sliding sleeve provided in this embodiment may be assembled between the grouting weight part 600 and the air floating part 700, when a pump is pumped into the floating completion sliding sleeve, the isolation diaphragm 300 may deform concavely under pressure to push the soluble supporting sliding sleeve 200 to move downwards, after the soluble supporting sliding sleeve 200 moves downwards for a certain distance, the isolation diaphragm 300 loses the support of the soluble supporting sliding sleeve 200, so as to break, at this time, the solution above the isolation diaphragm 300 enters and fills the lower space of the coupling body 100 over the isolation diaphragm 300, the soluble supporting sliding sleeve 200 is soaked in the solution and gradually and sufficiently dissolved, compared with the residual pressure bearing plate in the prior art, the soluble supporting sliding sleeve 200 in this embodiment is sufficiently dissolved without leaving a residue on the inner wall of the coupling body 100, so as to achieve the effect of full diameter, avoid forming the throat on the medial surface of coupling body 100 and influence the well cementation plug to pass through. The soluble supporting sliding sleeve 200 is made of soluble metal, and the isolating diaphragm 300 is made of waterproof material.
In some embodiments of this embodiment, the floating completion sliding sleeve further comprises a pressure limiting assembly 400, the pressure limiting assembly 400 is detachably connected to the soluble support sliding sleeve 200 and the coupling body 100, respectively, the isolation diaphragm 300 covers the pressure limiting assembly 400, and the pressure limiting assembly 400 is made of a drilling fluid soluble material.
Through the above embodiment of the embodiment, the pressure limiting assembly 400 is used to limit the connection strength between the soluble supporting sliding sleeve 200 and the coupling body 100, when the axial acting force applied to the soluble supporting sliding sleeve 200 exceeds a set value, the soluble supporting sliding sleeve 200 moves axially relative to the coupling body 100 until being separated from the pressure limiting assembly 400, the isolating diaphragm 300 is broken and automatically detached from the coupling body 100, so as to be separated from the cover of the isolating diaphragm 300, and the dissolving liquid passes through the isolating diaphragm 300 to soak the soluble supporting sliding sleeve 200, so that the soluble supporting sliding sleeve 200 is gradually dissolved; after the soluble supporting sliding sleeve 200 is separated from the pressure limiting assembly 400, the soluble supporting sliding sleeve 200 is separated from the coupling body 100, the soluble supporting sliding sleeve 200 is soaked in a dissolving liquid to be dissolved more uniformly and sufficiently, the pressure limiting assembly 400 remained on the inner side surface of the coupling body 100 is more regular in shape and size compared with a residual pressure bearing plate in the prior art under the condition that the pressure limiting assembly 400 is not dissolved, the shape and the size can be adjusted in advance, the controllability is higher, the dissolving liquid is filled in the lower space of the coupling body 100, the pressure limiting assembly 400 is soaked, the pressure limiting assembly 400 is dissolved, the residue on the inner side surface of the coupling body 100 is eliminated, the full-diameter effect is achieved, and the phenomenon that the formation of a necking on the inner side surface of the coupling body 100 influences the passing of a well cementation rubber plug is avoided. The drilling fluid is adopted for dissolving in the dissolving process, a special dissolving solution is not needed, local materials for construction are obtained, and the drilling fluid is environment-friendly and harmless.
In some embodiments of the present embodiment, the pressure limiting assembly 400 includes a soluble supporting tube 401, the soluble supporting tube 401 is disposed around the soluble supporting sliding sleeve 200, the soluble supporting tube 401 is detachably connected to the coupling body 100 and the soluble supporting sliding sleeve 200, and the isolating membrane 300 covers the upper end of the soluble supporting tube 401.
Through the above embodiment of the present embodiment, the soluble support tube 401 is made of a soluble material, the soluble support tube 401 is used for limiting the connection strength between the soluble support sliding sleeve 200 and the coupling body 100, when the axial acting force applied to the soluble support sliding sleeve 200 exceeds a set value, the soluble support sliding sleeve 200 moves axially relative to the coupling body 100 until being separated from the soluble support tube 401, and is automatically detached from the coupling body 100, so as to be separated from the cover of the isolation diaphragm 300, and the solution passes through the isolation diaphragm 300 to soak the soluble support sliding sleeve 200, so that the soluble support sliding sleeve 200 is gradually dissolved; because the soluble supporting sliding sleeve 200 and the soluble supporting pipe 401 are separated, the soluble supporting sliding sleeve 200 is separated from the coupling body 100, the soluble supporting sliding sleeve 200 is soaked in the dissolving liquid to be dissolved more uniformly and sufficiently, the soluble supporting pipe 401 remained on the inner side surface of the coupling body 100 is more regular in shape and size compared with the residual bearing plate in the prior art under the condition that the soluble supporting pipe 401 is not dissolved, the shape and the size can be adjusted in advance, the controllability is higher, the dissolving liquid is full of the lower space of the coupling body 100, the soluble supporting pipe 401 is soaked, the soluble supporting pipe 401 is dissolved, the residue on the inner side surface of the coupling body 100 is eliminated, the full-diameter effect is achieved, the phenomenon that a necking is formed on the inner side surface of the coupling body 100, and the influence on the passing of a well cementation rubber plug is caused is avoided. The soluble support tube 401 is made of soluble metal material.
In some embodiments of the present embodiment, a limiting step 101 is disposed on the inner side surface of the coupling body 100, and the lower end of the soluble support tube 401 abuts against the limiting step 101; and/or the diameter of the inside face of the soluble support tube 401 is smaller than the diameter of the inside face of the coupling body 100.
Through the above embodiment of the embodiment, the limiting step 101 can axially limit the soluble supporting tube 401, so that the soluble supporting tube 401 is located in the middle between the two ends of the coupling body 100, which is convenient for installing the soluble supporting tube 401 inside the coupling body 100 or detaching the soluble supporting tube 401 from the coupling body 100; the inside surface diameter of soluble stay tube 401 is less than the inside surface diameter of coupling body 100, can guarantee that there is the interval between the outside surface of soluble support sliding sleeve 200 and the inside surface of coupling body 100, soluble support sliding sleeve 200 slippage in 401 from soluble stay tube, can not take place the friction between soluble support sliding sleeve 200 and the coupling body 100 inside surface, it is more controllable to take place the required effort size of axial displacement to soluble support sliding sleeve 200, and can avoid soluble support sliding sleeve 200 and coupling body 100 inside surface top to touch and take place the card and die.
In some embodiments of this embodiment, the floating completion sleeve further comprises a screw-mounted press ring 500, the screw-mounted press ring 500 being removably connected to the collar body 100, the isolation diaphragm 300 being sandwiched between the screw-mounted press ring 500 and the dissolvable support tube 401.
Through the above embodiment of this embodiment, the thread-mounted pressure ring 500 can axially limit the upper end of the soluble support tube 401, the limit step 101 axially limits the lower end of the soluble support tube 401, the thread-mounted pressure ring 500 and the limit step 101 can limit the soluble support tube 401 from moving axially, so as to facilitate the disassembly and assembly of the soluble support tube 401, and can press and fix the isolation diaphragm 300 on the upper end of the soluble support tube 401, the isolation metal diaphragm can seal and cover the soluble support tube 401 and the soluble support sliding sleeve 200, and prevent the soluble support sliding sleeve 200 and the pressure limiting assembly 400 from dissolving when the casing is being lowered, after the casing is lowered, the pump truck increases the pressure in the casing to a preset value under the pressure of the pump truck, the pump is started to break the isolation diaphragm 300, the soluble support sliding sleeve 200 and the pressure limiting assembly 400 lose the covering protection of the isolation diaphragm 300, and the dissolution liquid soaks the soluble support sliding sleeve 200 and the pressure limiting assembly 400 to start the dissolution process, the effect of controllable solubility is achieved, and the dissolving time is controllable.
In some embodiments of the present embodiment, a press ring connecting thread 102 is provided on the inner side surface of the coupling body 100, and the screw-mounted press ring 500 is screwed with the coupling body 100 through the press ring connecting thread 102; and/or the diameter of the inner side surface of the thread mounting pressing ring 500 is equal to that of the inner side surface of the coupling body 100.
Through the above embodiment of the embodiment, the screw thread installation pressing ring 500 can be more conveniently detached from the coupling body 100 through the pressing ring connecting screw thread 102; the inside surface diameter of screw thread collar equals with the inside surface diameter of coupling body 100, treats that soluble support sliding sleeve 200 and voltage limiting component 400 are dissolved after, screw thread collar 500 can improve full latus rectum rate (the inside axial not the same proportion of part of the same position department diameter of coupling body 100), ensures that major diameter instruments such as follow-up well cementation plug, fracturing pump bridge plug pass through, conflicts with spacing step 101 when reducing follow-up instrument and passing through coupling body 100 and meets the card possibility.
In some embodiments of this embodiment, the dissolvable support sleeve 200 is nested inside the dissolvable support tube 401.
Through the above embodiment of the present embodiment, the outer side surface of the soluble support sliding sleeve 200 is slidably connected with the inner side surface of the soluble support pipe 401 along the axial direction of the coupling body 100, and the soluble support sliding sleeve 200 and the soluble support pipe 401 are kept fixed by friction; the friction force between the soluble supporting sliding sleeve 200 and the soluble supporting tube 401 is kept within a preset friction force range through pre-adjustment, in the pump opening process, when the axial acting force applied to the soluble supporting sliding sleeve 200 is larger than the preset friction force, the soluble supporting sliding sleeve 200 slides axially relative to the soluble supporting tube 401, the edge of the isolating diaphragm 300 is supported and fixed by the soluble supporting tube 401, and the central part of the isolating diaphragm 300 gradually sinks downwards and finally breaks.
In some embodiments of this embodiment, the outside face of the dissolvable support tube 401 mates with the inside face of the collar body 100; and/or the inner side surface of the soluble support tube 401 is tightly matched with the outer side surface of the soluble support sliding sleeve 200.
Through the above embodiment of this embodiment, the tight fit means a tight press fit, and there is no gap between the fitting surfaces, so as to achieve the effect of increasing the sliding friction force and the sealing performance.
In some embodiments of this embodiment, the pressure limiting assembly further comprises a soluble sealing element, and the outer side surface of the soluble support tube 401 is in sealing fit with the inner side surface of the coupling body 100 through the soluble sealing element 403; and/or the inner side surface of the soluble support pipe 401 is in sealing fit with the outer side surface of the soluble support sliding sleeve 200 through a soluble sealing member 403.
With the above-described embodiment of the present embodiment, the soluble sealing member 403 improves the sealing between the matching surfaces of the soluble support sliding sleeve 200 and the soluble support pipe 401, and improves the sealing between the matching surfaces of the soluble support pipe 401 and the coupling body 100, and prevents the solution from passing over the soluble support sliding sleeve 200 and the pressure limiting assembly 400 before the isolation diaphragm 300 is broken. Wherein, the soluble sealing member 403 adopts a soluble sealing O-shaped ring.
In some embodiments of the present embodiment, the pressure limiting assembly 400 comprises a dissolvable connecting member 402, and the dissolvable supporting tube 401 is pinned to the outer side of the dissolvable supporting sliding sleeve 200 by the dissolvable connecting member 402.
Through the above embodiment of this embodiment, through adjusting the shear strength of soluble connecting piece 402, the number of soluble connecting piece 402 in advance, realize adjusting the pump pressure value of opening, buyer's field adjustability improves the work adaptability under different degree of depth and pressure. Wherein the dissolvable links 402 employ dissolvable shear pins.
In some embodiments of this embodiment, the inner side of the upper end of the collar body 100 is provided with upper collar connecting threads 103; and/or, the outer side surface of the lower end of the coupling body 100 is provided with a coupling lower connecting thread 104.
With the above-described embodiments of the present embodiment, the tandem assembly of the collar body 100 onto a floating completion string is facilitated.
As shown in fig. 1, 2 and 3, the floating completion string comprises a grout weight 600 and an air floating portion 700 in sequence along the construction depth and direction, wherein a floating completion sleeve is connected in series between the grout weight 600 and the air floating portion 700.
In the working process of the floating completion sliding sleeve provided by the embodiment, the number of the soluble connecting pieces 402 is adjusted according to the installation position and the construction pressure of the floating completion sliding sleeve of the construction well, so that the pumping pressure parameter is adjusted, and the soluble support sliding sleeve 200 is assembled;
then, the floating completion pipe column is put in according to the construction schematic diagram in sequence, air is sealed at the lower part of the floating completion sliding sleeve, the weight per unit length is reduced, the slurry shaft is in a low-gravity floating state, and the frictional resistance is reduced by reducing the pressure on the lower wall of the shaft bottom;
because the pressure on the lower wall is reduced, tools such as a coupling, a centralizer and the like are pressed into a mud cake on a well wall to a shallow depth, the mud viscous suction is small, and because the friction resistance and the viscous suction are small, the stress bending of the horizontal section of the sleeve is reduced, and the spiral self-locking force is reduced, so that the sleeve is easier to extend to the far end in the horizontal section;
the upper part of the floating well completion sliding sleeve is loaded by adopting mud or weighted mud, so that higher lower pressure is obtained, and under the environment of increasing the lower pressure, a further sleeve can extend to a far end more easily in a horizontal section, so that the smooth completion of the casing running of the large-displacement floating well completion is ensured;
after casing running is finished, under the action of the pressure of a pump truck, the pump truck raises the pressure in the casing to a preset range, the soluble supporting sliding sleeve 200 is pressed downwards to cut the soluble connecting piece 402, liquid soaks the whole casing shaft, the isolation diaphragm 300 loses the protection of soluble materials (the soluble supporting sliding sleeve 200 and the pressure limiting assembly 400), the soluble supporting pipe 401, the soluble connecting piece 402, the soluble sealing piece 403 and the soluble supporting sliding sleeve 200 start to dissolve, and after dissolution, the inner diameter of the floating well completion sliding sleeve is consistent with the inner diameter of the casing, so that no residue and full drift diameter are realized;
after the circulating well washing is dissolved, well cementation can be carried out according to a normal well cementation procedure;
and in the later stage, the pumping bridge plug is fractured, and the lower bridge plug blocks water, throws a fracturing ball and leads to a well to scrape the pipe without being influenced.
In conclusion, the floating completion sliding sleeve provided by the embodiment has the following advantages:
controllability and solubility: the isolation diaphragm 300 protects to prevent dissolution when the casing is put, the pump is started to lose the protection of the isolation diaphragm 300 after the casing is put, and the liquid is soaked to start the dissolution process;
no residue, full bore: the selected material has high dissolution degree and no residue after dissolution; after dissolution, the complete well sliding sleeve has a full drift diameter, so that the normal construction of later-stage pumping bridge plugs, separate production and separate injection of lower packers or water plugging and the like is ensured;
pressure is adjustable through the dissolvable connector 402: by adjusting the number of the soluble connecting pieces 402, the set pump-on pressure can be adjusted, and the reliability and the adaptability under the condition of no depth and construction pressure are ensured.
The "axial direction" refers to a direction parallel to the central axis of the coupling body 100, the soluble supporting sliding sleeve 200, the soluble supporting tube 401, the soluble sealing member 403, and the soluble connecting member 402 are made of soluble materials, and the isolating membrane 300 is made of high-temperature-resistant waterproof materials, such as temperature-resistant waterproof plastics, temperature-resistant waterproof rubber, temperature-resistant waterproof resin materials, and the like.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A floating well completion sliding sleeve is characterized by comprising a coupling body (100), a soluble supporting sliding sleeve (200) and an isolation diaphragm (300); the isolation diaphragm (300) divides the inner space of the coupling body (100) into an upper part and a lower part, the soluble supporting sliding sleeve (200) is detachably assembled in the coupling body (100), the isolation diaphragm (300) covers the upper surface of the soluble supporting sliding sleeve (200), and the isolation diaphragm (300) and the inner cavity surface of the coupling body (100) are in a film-shaped waterproof protection form.
2. The floating completion sleeve of claim 1, further comprising a pressure limiting assembly (400), wherein the pressure limiting assembly (400) is detachably connected to the soluble support sleeve (200) and the coupling body (100), respectively, the isolation diaphragm (300) is disposed above the pressure limiting assembly (400), and the pressure limiting assembly (400) is made of a drilling fluid soluble material.
3. The floating completion sliding sleeve according to claim 2, wherein the pressure limiting assembly (400) comprises a soluble support pipe (401), the soluble support pipe (401) is sleeved on the soluble support sliding sleeve (200), the soluble support pipe (401) is detachably connected with the coupling body (100) and the soluble support sliding sleeve (200), respectively, and the isolation diaphragm (300) covers the upper end of the soluble support pipe (401).
4. A floating completion slide sleeve according to claim 3, wherein said dissolvable support slide sleeve (200) is nested inside said dissolvable support tubes (401).
5. The floating completion slide sleeve of claim 3 or 4, wherein the pressure limiting assembly (400) further comprises a dissolvable connection (402), the dissolvable support tube (401) pinned to the outside face of the dissolvable support slide sleeve (200) by the dissolvable connection (402).
6. The floating completion sliding sleeve according to claim 3, wherein a limiting step (101) is arranged on the inner side surface of the coupling body (100), and the lower end of the soluble support tube (401) is abutted against the limiting step (101); and/or the diameter of the inner side surface of the soluble support tube (401) is smaller than the diameter of the inner side surface of the coupling body (100).
7. The floating completion sliding sleeve according to claim 3 or 4 or 6, further comprising a screw-mounted clamping ring (500), wherein the screw-mounted clamping ring (500) is detachably connected with the coupling body (100), and the isolation diaphragm (300) is sandwiched between the screw-mounted clamping ring (500) and the soluble support pipe (401).
8. The floating completion sliding sleeve according to claim 7, wherein a pressing ring connecting thread (102) is arranged on the inner side surface of the coupling body (100), and the thread mounting pressing ring (500) is in threaded connection with the coupling body (100) through the pressing ring connecting thread (102); and/or the diameter of the inner side surface of the thread mounting pressing ring (500) is equal to that of the inner side surface of the coupling body (100); and/or the inner side surface of the upper end of the coupling body (100) is provided with a coupling upper connecting thread (103); and/or the outer side surface of the lower end of the coupling body (100) is provided with a coupling lower connecting thread (104).
9. The floating completion sleeve of claim 3 or 4 or 6 or 8, wherein the outer side of the soluble support tube (401) is tightly fitted with the inner side of the coupling body (100); and/or the inner side surface of the soluble support tube (401) is tightly matched with the outer side surface of the soluble support sliding sleeve (200).
10. The floating completion sleeve of claim 3 or 4 or 6 or 8, wherein the pressure limiting assembly (400) further comprises a dissolvable seal (403), wherein the outer side surface of the dissolvable support tube (401) is in sealing engagement with the inner side surface of the collar body (100) via the dissolvable seal (403); and/or the inner side surface of the soluble support pipe (401) is in sealing fit with the outer side surface of the soluble support sliding sleeve (200) through the soluble sealing element (403).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220470561.8U CN217327261U (en) | 2022-03-04 | 2022-03-04 | Floating well completion sliding sleeve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220470561.8U CN217327261U (en) | 2022-03-04 | 2022-03-04 | Floating well completion sliding sleeve |
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| CN217327261U true CN217327261U (en) | 2022-08-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116255111A (en) * | 2023-03-29 | 2023-06-13 | 陕西靖瑞能源科技股份有限公司 | Resin well cementation plugging device and construction method |
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2022
- 2022-03-04 CN CN202220470561.8U patent/CN217327261U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116255111A (en) * | 2023-03-29 | 2023-06-13 | 陕西靖瑞能源科技股份有限公司 | Resin well cementation plugging device and construction method |
| CN116255111B (en) * | 2023-03-29 | 2023-11-14 | 陕西靖瑞能源科技股份有限公司 | Resin well cementation plugging device and construction method |
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