CN215444033U - One-spoon one-opening type full-drift-diameter infinite-grade fracturing well completion component - Google Patents
One-spoon one-opening type full-drift-diameter infinite-grade fracturing well completion component Download PDFInfo
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Abstract
The utility model discloses a one-key one-open full-drift-diameter infinite-grade fracturing well completion component which comprises a fracturing well completion sliding sleeve and an opening tool. The fracturing well completion sliding sleeve comprises an outer sleeve and an inner sliding sleeve connected to the inner wall of the outer sleeve through a shearing pin, a positioning piece is movably arranged between the outer sleeve and the inner sliding sleeve, and the positioning piece is an elastic body embedded into a positioning groove; the outer sleeve is provided with a sand blasting hole and a positioning groove, the upper part of the inner sliding sleeve is provided with a closing groove, the lower part of the inner sliding sleeve is provided with an opening groove, the opening groove comprises a guide opening, a sliding block groove and a guide groove, and the middle of the opening groove is provided with a plurality of sealing elements; the outer sleeve is connected with the lower joint. The opening tool is in a structure matched with the opening tool only, and the matching of the sliding block and the groove has various sequence combinations, so that the staged fracturing series is not limited, and one key and one opening of the well completion sliding sleeve of fracturing at any fixed point can be realized; the full drift diameter of the fracturing well completion pipe column can be realized; the requirements of continuous, quick, large-scale and infinite-level fracturing well completion construction are met, and the fracturing efficiency is improved.
Description
Technical Field
The utility model relates to a fracturing well completion component of an oil-water well in the petroleum industry, in particular to a one-key one-open type full-drift-diameter infinite-grade fracturing well completion component.
Background
At present, fracturing well completion technologies for low-permeability and compact oil reservoirs at home and abroad are mainly divided into an open hole multistage staged fracturing well completion technology and a casing cementing multistage staged fracturing well completion technology. The mainstream technology covers modes such as ball-throwing sliding sleeve type multi-stage staged fracturing well completion, pumping bridge plug multi-stage staged fracturing well completion and the like.
The ball throwing sliding sleeve type multistage staged fracturing well completion technology is applied to open hole fracturing well completion or casing cementing fracturing well completion, balls and ball seats with different grade differences are combined, and staged fracturing is completed stage by throwing the balls with different grade differences and opening fracturing well completion sliding sleeves with corresponding grade differences. The technology is influenced by the size of the ball seats arranged in a grading way, the number of the subsections and the fracturing scale are greatly limited, the transformation effect is influenced, the ball seats are required to be drilled and ground in the later production to form a full drift diameter, and the operation cost is high. The pumping bridge plug multistage staged fracturing well completion technology is applied to casing cementing fracturing well completion, the technology has no limitation on staged stages, but the perforation fracturing combined process cannot keep fracturing continuity, the operation period is long, drilling plugs are needed after the operation is completed, the operation cost is high, and selective production or secondary fracturing cannot be performed in the later stage.
In recent years, various delivery type fracturing technologies for opening a fracturing sliding sleeve are developed successively by various large oil companies. Chinese patent CN103556971B entitled "full-bore layered fracturing sliding sleeve for oil-gas well operation" in 2016, 3, month and 2, discloses a novel pitching sliding sleeve comprising a step type moving mechanism, which comprises a working barrel including an inner barrel capable of moving axially in an outer barrel, a shearing pin positioned between the outer barrel and the inner barrel and a limit structure for limiting the sliding distance of the inner barrel, at least one axial end of the outer barrel is provided with a connector, a flow guide hole capable of communicating with the inner cavity of the working barrel is arranged at the barrel wall, the inner peripheral wall of the working barrel is provided with groove structures arranged at intervals and a step type moving structure capable of turning over each groove and adapting to the diameter of a start ball; the step-type moving structure is provided with a front group of drift diameter switch structures and a rear group of drift diameter switch structures which can independently control the starting balls to pass through; the distance between every two adjacent grooves on the inner peripheral wall of the working barrel is non-integral multiple of the distance between the drift diameter switch structures. The sliding sleeve technology can realize the function of sequentially throwing balls with the same size to gradually open the sliding sleeve, can realize unlimited stages and keep the full drift diameter of all the sliding sleeves in principle, but the sliding sleeve has sand blocking risk in actual use, so that the sliding sleeve cannot be normally opened, and a fracturing layer section is lost; in addition, as the structure of the fracturing head does not relate to a sealing mechanism, the fracturing construction is easy to cause vertical leakage; the starting ball in the later process still needs to be discharged back, and the process is complex.
In addition, chinese patent application CN110905448A published in 24/3/2020, "an infinite graded full-bore fracturing sliding sleeve assembly system", which discloses a fracturing system including a plurality of sub-fracturing sliding sleeves connected in series through a pipeline and in one-to-one correspondence with a plurality of opening mechanisms, including a plurality of opening mechanisms and a plurality of sub-fracturing sliding sleeves connected in series through a pipeline, wherein each sub-fracturing sliding sleeve in the plurality of sub-fracturing sliding sleeves includes an upper joint, a lower joint, an inner sleeve, a shear connector and a positioning groove, wherein the upper joint and the lower joint are coaxially and fixedly connected and constitute an outer cylinder, and a fracturing hole is provided through a circumferential wall of the upper joint; the shearing connecting piece fixedly connects the inner sleeve sleeved in the outer cylinder with the upper joint so as to enable the inner sleeve to be positioned at a first position covering a fracturing hole of the upper joint; the positioning groove is a recess which is formed on the inner peripheral wall of the upper joint and has a preset length along the up-down direction, and the recess is positioned on the inner sleeve; the length of the concave part of the upper sub fracturing sliding sleeve in any two adjacent sub fracturing sliding sleeves in the plurality of sub fracturing sliding sleeves is smaller than the length of the concave part of the lower sub fracturing sliding sleeve; each opening mechanism in the plurality of opening mechanisms is provided with a column body and a positioning elastic piece arranged on the column body, and the diameter of the column body can enable the column body to penetrate through the inner sleeve; the length of the positioning elastic piece of each opening mechanism corresponds to the length of the recess of only one sub-fracturing sliding sleeve in the plurality of sub-fracturing sliding sleeves, so that the opening mechanism can expand the positioning elastic piece of the opening mechanism when reaching the corresponding recess, and the positioning elastic piece of the opening mechanism is embedded into the corresponding recess. The system can realize that the whole tubular column is a full drift diameter without drilling and removing operation after fracturing of all intervals is finished, so that later-stage production management is facilitated, the multistage sliding sleeves are connected in series to realize infinite stages, but the positioning elastic part of the opening mechanism in the fracturing sliding sleeve system is easy to generate plastic deformation in the process of passing through the multistage fracturing sliding sleeves, so that opening failure is caused, and the fractured intervals are lost; meanwhile, the positioning groove is an annular gap between the upper joint and the inner sleeve, and selective switching cannot be performed at the later stage.
Therefore, a full-drift-diameter fracturing well completion assembly which can be implemented continuously and rapidly in large scale without limited stages in horizontal wells, straight inclined wells and the like and is multi-stage and multi-cluster is urgently needed, and any sliding sleeve can be opened or closed selectively in the later period according to needs.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provides a one-key one-open full-drift-diameter infinite-grade fracturing completion component. The opening tool can be uniquely matched with the fracturing well completion sliding sleeve, the requirements of continuous, rapid, multistage and multi-cluster fracturing well completion construction are met, and the fracturing efficiency is improved.
The technical scheme of the utility model is as follows: a spoon-open full bore infinite fracturing completion assembly comprising a fracturing completion sliding sleeve and an opening tool for opening the fracturing completion sliding sleeve, wherein the fracturing completion sliding sleeve comprises:
the outer sleeve is provided with a plurality of sand blasting holes communicated with the inner cavity, and the outer sleeve is provided with a plurality of positioning grooves;
the inner sliding sleeve is arranged on the inner wall of the outer sleeve in a sliding mode and connected with the outer sleeve through a shearing pin, and the outer wall of the inner sliding sleeve is used for sealing the sand blasting hole; a positioning piece matched with the positioning groove is movably arranged on the outer surface of the inner sliding sleeve; a first sealing element is also arranged between the outer sleeve and the inner sliding sleeve; the inner wall of the inner sliding sleeve is respectively provided with an opening groove and a closing groove, the opening groove is uniquely matched with an opening tool, the opening groove comprises a guide opening and a sliding block groove connected with the guide opening, the lower end of the sliding block groove is connected with the guide groove, an inner sliding sleeve accommodating cavity used for opening the sand blasting hole when the inner sliding sleeve moves is arranged in the outer sleeve, and one positioning groove is positioned in the inner sliding sleeve accommodating cavity;
the sliding sleeve lower joint is in threaded connection with the lower end of the outer sleeve, and a guide slope surface is arranged at the upper end of the sliding sleeve lower joint.
Preferably, the opening tool comprises:
the outer surface of the tool upper joint is provided with a second sealing element used for sealing the inner wall of the inner sliding sleeve, and the upper end of the tool upper joint is provided with a soluble ball used for sealing the inner cavity;
the central tube is in threaded connection with the upper tool joint, an opening sliding block matched with the opening groove is movably mounted on the outer wall of the central tube, and a spring used for opening the radial expansion of the sliding block is further arranged between the central tube and the opening sliding block;
the tool lower joint is arranged at the lower end of the central pipe and connected with the central pipe through a connecting piece, a pressing cap is arranged between the connecting piece and the tool lower joint, a plurality of guide keys extending out of the outer surface of the pressing cap are mounted on the pressing cap, and the guide keys are uniquely matched with the guide grooves.
Preferably, the opening grooves are spirally distributed at the lower part of the inner sliding sleeve in 360 degrees, the opening grooves and the axis of the inner sliding sleeve form an inclination angle alpha, and the inclination angle alpha is 0-60 degrees.
Preferably, a limiting groove for radially limiting the opening slide block is formed between the connecting piece and the tool upper joint and between the connecting piece and the central tube.
Preferably, the limiting grooves are multiple and respectively correspond to the opening grooves.
Preferably, the guide key is an elastic guide key.
Preferably, the first sealing parts are a plurality of, and the first sealing parts are rubber sealing rings and are respectively arranged among the sand blasting holes, the shearing pins and the positioning parts.
Preferably, the number of the second sealing members is plural, and the second sealing members are rubber seal rings.
Preferably, the number of the springs between each opening slide block and the central pipe is 2-6, and a telescopic space for the opening slide blocks to stretch is arranged between each opening slide block and the central pipe.
Preferably, the positioning piece is an elastic positioning piece, and the opening tool is made of a soluble metal material.
Compared with the prior art, the utility model has the following advantages:
(1) the matching of the fracturing well completion sliding sleeve in the full-bore infinite-grade fracturing well completion assembly and the sliding block and the groove of the opening tool has uniqueness, and the opening at any fixed point can be realized;
(2) the matching of the sliding block and the groove of the fracturing completion sliding sleeve and the opening tool has various sequence combinations, and the staged fracturing stage number is not limited;
(3) the fracturing well completion sliding sleeve is designed to have an equal drift diameter, no level difference exists, the number of fracturing stages is not limited, and the requirements of large-displacement and large-scale fracturing construction are met;
(4) the fracturing well completion sliding sleeve is uniquely matched with an opening tool, so that the fracturing well completion sliding sleeve can be opened one by one, the continuous, quick, large-scale and infinite fracturing construction requirements are met, and the fracturing efficiency is improved;
(5) the opening tool in the assembly can be dissolved after being pressed, the full drift diameter of the fracturing well completion sliding sleeve is ensured, drilling and plugging are not needed, fishing are not needed, and the process is simple, safe and reliable;
(6) after pressing, any fracturing well completion sliding sleeve can be selectively closed through a special hydraulic control switch tool, and the requirements of selective water control production or secondary fracturing construction are met.
Drawings
FIG. 1 is a schematic structural diagram of a fracturing completion sliding sleeve of the present invention;
FIG. 2 is a schematic view showing the deployment of the unsealing groove of the present invention;
FIG. 3 is an enlarged partial schematic view of FIG. 2;
FIG. 4 is a schematic view of the opening tool of the present invention;
FIG. 5 is a schematic top view of the opening slider of the present invention;
FIG. 6 is a schematic top view of a guide key according to the present invention;
in the figure: 3-1, coating; 3-2, closing the groove; 3-3, an inner sliding sleeve; 3-4, sand blasting; 3-5, shearing pins; 3-6, positioning parts; 3-7, opening the groove; 3-8, positioning grooves; 3-9, a first seal; 3-10 parts of sliding sleeve lower joint, 3-11 parts of sliding block groove; 3-12, a guide groove; 3-13, a guide opening; 13-1, soluble spheres; 13-2, connecting the tool; 13-3, a second seal; 13-4, a central tube; 13-5, a spring; 13-6, opening a sliding block; 13-7, connecting pieces; 13-8, a guide key; 13-9, a lower tool joint; 13-10, pressing the cap.
Detailed Description
The utility model is further illustrated below with reference to the figures and examples.
Example one
Referring to fig. 1-6, a spoon-open full bore infinite staged fracturing completion assembly includes a fracturing completion sleeve and an opening tool for opening the fracturing completion sleeve. The fracturing well completion sliding sleeve comprises a fixed outer sleeve 3-1 and an inner sliding sleeve 3-3 connected to the inner wall of the outer sleeve 3-1 through a shearing pin 3-5, and a positioning piece 3-6 is further arranged between the outer sleeve 3-1 and the inner sliding sleeve 3-3. Wherein, the outer sleeve 3-1 is provided with 3-4 (6-10 evenly distributed) sand blasting holes and 2 positioning grooves which are communicated with the inner cavity, the upper part of the inner sliding sleeve 3-3 is provided with a closing groove 3-2, the lower part is provided with an opening groove 3-7, and the middle part is provided with a plurality of sealing elements 3-9. The outer sleeve 3-1 is connected with the lower joint 3-10 of the sliding sleeve through threads. The positioning piece 3-6 is an elastic body (an elastic sheet or an elastic ring) embedded in the positioning groove 3-8.
When the outer sleeve 3-1 and the inner sliding sleeve 3-3 are connected together through the shearing pin 3-5, the outer wall of the inner sliding sleeve 3-3 is used for sealing the sand blasting hole 3-4, and the sand blasting hole 3-4 is in a sealing state at the moment.
A plurality of first sealing elements 3-9 are also arranged between the outer sleeve 3-1 and the inner sliding sleeve 3-3, and the inner sliding sleeve 3-3 can be in a sealing state when sliding relative to the outer sleeve 3-1 through the first sealing elements 3-9.
The upper end of the lower joint 3-10 of the sliding sleeve is provided with a guide slope surface, an inner sliding sleeve accommodating cavity used for opening the sand blasting hole 3-4 when the inner sliding sleeve 3-3 moves is arranged in the outer sleeve 3-1, and one positioning groove 3-8 is positioned in the inner sliding sleeve accommodating cavity. When the shearing pin 3-5 is sheared, the inner sliding sleeve 3-3 moves downwards to the inner sliding sleeve accommodating cavity and enters the positioning groove 3-8 in the inner sliding sleeve accommodating cavity through the positioning piece 3-6 for positioning, and at the moment, the sand blasting hole 3-4 is in an opening state.
The opening tool includes: soluble ball 13-1, tool upper joint 13-2, second sealing element 13-3, central tube 13-4, spring 13-5, opening slide block 13-6, connecting piece 13-7, guide key 13-8, press cap 13-10 and tool lower joint 13-9.
Wherein the second sealing member 13-3 is provided on the outer surface of the tool upper joint 13-2, and the soluble ball 13-1 is provided on the upper end of the tool upper joint 13-2 for sealing the inner cavity of the tool upper joint 13-2.
The central tube 13-4 is in threaded connection with the tool upper joint 13-2, the outer wall of the central tube 13-4 is movably provided with an opening slide block 13-6 matched with the opening groove 3-7, and the outer wall of the central tube 13-4 is also provided with a spring 13-5 for radially expanding and contracting the opening slide block 13-6; the upper end of the lower tool joint 13-9 is connected with the lower end of the central tube 13-4 in a threaded mode.
The opening grooves 3-7 include guide openings 3-13, slider grooves 3-11, and guide grooves 3-12. Wherein, the guide opening 3-13 is conical and is connected with the slide block groove 3-11 and the guide groove 3-12, the slide block groove 3-11 is uniquely matched with the opening slide block 13-6, and the guide groove 3-12 is uniquely matched with the guide key 13-8. A connecting piece 13-7 is also arranged between the lower tool joint 13-9 and the central tube 13-4, and a limiting groove for radially limiting the opening slide block 13-6 is formed between the connecting piece 13-7 and the upper tool joint 13-2 and the central tube 13-4. A pressing cap 13-10 is arranged between the connecting piece 13-7 and the lower tool joint 13-9, a plurality of guide keys 13-8 extending out of the outer surface of the pressing cap 13-10 are arranged on the pressing cap 13-10, and the guide keys 13-8 are elastic guide keys. In summary, the shape and size of the opening recess 3-7 exactly match the shape and size of the opening slider 13-6 and the guide key 13-8.
The working principle is as follows:
when fracturing construction is carried out, the opening tool is delivered, and the fracturing completion sliding sleeve in the initial state is entered through pumping (the initial state is a state that the inner sliding sleeve 3-3 closes the sand blasting holes 3-4).
Firstly, when the opening tool is not matched with the fracturing well completion sliding sleeve, namely the shapes and the sizes of the opening sliding block 13-6 and the guide key 13-8 are not matched with the shapes and the sizes of the sliding block groove 3-11 and the guide groove 3-12 respectively, the opening action can not be realized, and at the moment, the opening sliding block 13-6 and the guide key 13-8 are always in a compression state and pass through the non-matching sliding sleeve until entering the corresponding matching sliding sleeve.
When the opening tool is matched with the fracturing well completion sliding sleeve, the opening sliding block 13-6 and the guide key 13-8 are in a compressed state when not entering the opening groove 3-7, when entering the opening groove 3-7, the shapes and the sizes of the sliding block groove 3-11 and the guide groove 3-12 are completely matched with those of the opening sliding block 13-6 and the guide key 13-8 of the opening tool, and the opening sliding block 13-6 and the guide key 13-8 are in a free state and locked with the sliding block groove 3-11 and the guide groove 3-12. At the moment, the inner cavity of the tool is opened by sealing the soluble ball 13-1, the second sealing element 13-3 and the inner sliding sleeve 3-3 are in an interference sealing state, and the inner channel of the inner sliding sleeve 3-3 is completely sealed; when the casing pipe is suppressed to a preset pressure under the hydraulic action, the shearing pin 3-5 on the fracturing well completion sliding sleeve is sheared, the opening tool drives the inner sliding sleeve 3-3 to move downwards, the positioning piece 3-6 climbs out of the positioning groove 3-8 and is in a compressed state, and the positioning piece and the inner sliding sleeve 3-3 continuously move downwards to enter the next positioning groove 3-8 and are in a free state. And the inner sliding sleeve 3-3 is locked with an opening tool and is positioned in an inner sliding sleeve accommodating cavity to be opened in place, the inner sliding sleeve does not move downwards any more, the sand blasting hole 3-4 is exposed, the fracturing well completion sliding sleeve is in a fully opened state, a fracturing channel is established, and the one-spoon one-opening action of opening the fracturing well completion sliding sleeve at any fixed point is completed.
The matching parameters of A, B, C, D and alpha on the opening groove 3-7 on the fracturing completion sliding sleeve, A ', B ' and alpha ' on the guide key 13-8 of the opening tool and C ', D ' and alpha ' on the opening sliding block 13-6 need to be all in one-to-one correspondence to realize the opening action of the inner sliding sleeve 3-3, and the parameter of A, B, C, D and alpha on each fracturing completion sliding sleeve can only be matched with one single parameter, namely the parameter of A ', B ', C ', D ' and alpha ' on the opening tool.
The A, B, C, D, alpha parameters on the fracturing completion sleeve of the present invention should be set so that all parameters of the sleeve identify all the parameters a ', B ', C ', D ', alpha ' on the corresponding opening tool uniquely matching the sleeve. When the opening groove 3-7 on one fracturing well completion sliding sleeve is completely matched with the opening tool structure, the opening sliding block 13-6 and the guide key 13-8 are squeezed into the opening groove 3-7 under the action of elastic force, so that two corresponding tools are combined together to complete the opening action, and the fracturing well completion sliding sleeve is opened uniquely at any fixed point. Thereby realizing the operation of one key and one opening.
The A, B, C, D and alpha parameters on the fracturing well completion sliding sleeve and the A ', B ', C ', D ' and alpha ' parameters on the corresponding opening tool can be in one-to-one correspondence and randomly changed and combined, and the full-path infinite-grade fracturing well completion sliding sleeve combination with one spoon and one opening can be realized as long as the parameters are completely matched.
Example two
Basically the same as the first embodiment, except that the plurality of open grooves 3-7 are spirally distributed at 360 degrees at the lower part of the inner sliding sleeve 3-3, the open grooves 3-7 and the axis of the inner sliding sleeve 3-3 have an inclination angle alpha, and the inclination angle alpha is 0-60 degrees.
The number of the first sealing parts 3-9 is multiple, the number of the first sealing parts 3-9 and the number of the second sealing parts 13-3 are rubber sealing rings, and the first sealing parts 3-9 are respectively arranged among the sand blasting holes 3-4, the shearing pins 3-5 and the positioning parts 3-6. The positioning elements 3-6 in the various embodiments are elastic positioning elements.
EXAMPLE III
Basically the same as the first embodiment, except that 2-6 springs 13-5 are arranged between each opening slider 13-6 and the central tube 13-4, and a telescopic space for the opening slider 13-6 to extend and retract is arranged between each opening slider 13-6 and the central tube 13-4. By setting the number of the springs 13-5 to 2-6, a better balance and stabilization effect can be achieved, and the expansion of the opening slide block 13-6 and the stability of the opening load are ensured.
Example four
Basically the same as the first embodiment, except that the first sealing member 3-9 is provided in plurality, the first sealing member 3-9 and the second sealing member 13-3 are rubber seal rings, and the first sealing member 3-9 is respectively arranged between the sand blasting hole 3-4, the shear pin 3-5 and the positioning member 3-6. The positioning elements 3-6 in the various embodiments are elastic positioning elements.
EXAMPLE five
In addition, a closing groove 3-2 is formed in the inner wall of the inner sliding sleeve, when selective production or secondary fracturing is needed according to production requirements in the later stage, a special closing pipe column matched with a special hydraulic control closing tool can be used to be arranged in the fracturing well completion sliding sleeve needing to be closed, the locking claw is opened through hydraulic pressure to be locked with the inner sliding sleeve 3-3, the special closing pipe column is lifted up to drive the inner sliding sleeve 3-3 to move upwards, a sand blasting hole 3-4 in the outer sleeve 3-1 is closed, and the purpose of selectively closing any fracturing well completion sliding sleeve is achieved. If the fracturing well completion sliding sleeve is opened again at a fixed point, an opening tool matched with the fixed point fracturing well completion sliding sleeve can be selected, and the first embodiment is repeated to finish the opening action.
The present invention is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention, and the contents of the changes still fall within the scope of the present invention.
Claims (10)
1. A spoon one open full latus rectum infinitely variable level fracturing completion subassembly, its characterized in that includes fracturing completion sliding sleeve and is used for opening the opening instrument of fracturing completion sliding sleeve, wherein, fracturing completion sliding sleeve includes:
the outer sleeve is provided with a plurality of sand blasting holes communicated with the inner cavity, and the outer sleeve is provided with a plurality of positioning grooves;
the inner sliding sleeve is arranged on the inner wall of the outer sleeve in a sliding mode and connected with the outer sleeve through a shearing pin, and the outer wall of the inner sliding sleeve is used for sealing the sand blasting hole; a positioning piece matched with the positioning groove is movably arranged on the outer surface of the inner sliding sleeve; a first sealing element is also arranged between the outer sleeve and the inner sliding sleeve; the inner wall of the inner sliding sleeve is respectively provided with an opening groove and a closing groove, the opening groove is matched with an opening tool, the opening groove comprises a guide opening and a sliding block groove connected with the guide opening, the lower end of the sliding block groove is connected with the guide groove, an inner sliding sleeve accommodating cavity used for opening the sand blasting hole when the inner sliding sleeve moves is arranged in the outer sleeve, and one positioning groove is positioned in the inner sliding sleeve accommodating cavity;
the sliding sleeve lower joint is in threaded connection with the lower end of the outer sleeve, and a guide slope surface is arranged at the upper end of the sliding sleeve lower joint.
2. A spoon-open full bore infinite grade fracturing completion assembly as in claim 1, wherein the opening tool comprises:
the outer surface of the tool upper joint is provided with a second sealing element used for sealing the inner wall of the inner sliding sleeve, and the upper end of the tool upper joint is provided with a soluble ball used for sealing the inner cavity;
the central tube is in threaded connection with the upper tool joint, an opening sliding block matched with the opening groove is movably mounted on the outer wall of the central tube, and a spring used for opening the radial expansion of the sliding block is further arranged between the central tube and the opening sliding block;
the tool lower joint is arranged at the lower end of the central pipe and connected with the central pipe through a connecting piece, a pressing cap is arranged between the connecting piece and the tool lower joint, a plurality of guide keys extending out of the outer surface of the pressing cap are mounted on the pressing cap, and the guide keys are matched with the guide grooves.
3. A spoon-open full bore infinite grade fracturing completion assembly as claimed in claim 1 or 2, wherein: the opening grooves are spirally distributed on the lower part of the inner sliding sleeve in 360 degrees, and an inclination angle alpha is formed between the opening grooves and the axis of the inner sliding sleeve and is 0-60 degrees.
4. A spoon-open full bore infinite grade fracturing completion assembly as recited in claim 2 wherein: and a limiting groove for radially limiting the opening slide block is formed between the connecting piece and the tool upper joint as well as the central tube.
5. The one-spoon-open full-bore infinite-grade fracturing completion assembly of claim 4, wherein: the limiting grooves are multiple and correspond to the opening grooves respectively.
6. A spoon-open full bore infinite grade fracturing completion assembly as recited in claim 2 wherein: the guide key is an elastic guide key.
7. A spoon-open full bore infinite grade fracturing completion assembly as recited in claim 1 wherein: the first sealing parts are a plurality of rubber sealing rings and are respectively arranged among the sand blasting holes, the shearing pins and the positioning parts.
8. A spoon-open full bore infinite grade fracturing completion assembly as recited in claim 2 wherein: the second sealing parts are multiple and are rubber sealing rings.
9. A spoon-open full bore infinite grade fracturing completion assembly as recited in claim 2 wherein: the number of the springs between each opening sliding block and the central pipe is 2-6, and a telescopic space for opening the sliding blocks to stretch is arranged between each opening sliding block and the central pipe.
10. A spoon-open full bore infinite grade fracturing completion assembly as recited in claim 2 wherein: the locating piece is an elastic locating piece, and the opening tool is made of a soluble metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022390389.9U CN215444033U (en) | 2020-10-26 | 2020-10-26 | One-spoon one-opening type full-drift-diameter infinite-grade fracturing well completion component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022390389.9U CN215444033U (en) | 2020-10-26 | 2020-10-26 | One-spoon one-opening type full-drift-diameter infinite-grade fracturing well completion component |
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| CN215444033U true CN215444033U (en) | 2022-01-07 |
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| CN202022390389.9U Active CN215444033U (en) | 2020-10-26 | 2020-10-26 | One-spoon one-opening type full-drift-diameter infinite-grade fracturing well completion component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198078A (en) * | 2022-01-14 | 2022-03-18 | 西南石油大学 | Nonlinear-guiding infinite-grade full-bore well cementation sliding sleeve and construction process method thereof |
-
2020
- 2020-10-26 CN CN202022390389.9U patent/CN215444033U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198078A (en) * | 2022-01-14 | 2022-03-18 | 西南石油大学 | Nonlinear-guiding infinite-grade full-bore well cementation sliding sleeve and construction process method thereof |
| CN114198078B (en) * | 2022-01-14 | 2024-05-17 | 西南石油大学 | Nonlinear-guide infinite-stage full-drift-diameter well cementation sliding sleeve construction process method |
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