CN103541709B - Fracturing sliding bush assembly - Google Patents
Fracturing sliding bush assembly Download PDFInfo
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- CN103541709B CN103541709B CN201210244529.9A CN201210244529A CN103541709B CN 103541709 B CN103541709 B CN 103541709B CN 201210244529 A CN201210244529 A CN 201210244529A CN 103541709 B CN103541709 B CN 103541709B
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Abstract
The present invention relates to a kind of fracturing sliding bush assembly, comprise housing and be arranged on sliding pawl cover, the first sliding sleeve and the second sliding sleeve in housing.Wherein, the ratchet structure, the locating slot that are put by sliding pawl, the rotation rib on the positioning rib on the first sliding sleeve and the second sliding sleeve with the use of the opening and closing that can realize fracturing sliding bush assembly.It is unrestricted that fracturing sliding bush assembly of the present invention can realize fractured layer figure place, and simple to operate, applied widely.
Description
Technical field
The present invention relates to a kind of fracturing sliding bush assembly, particularly a kind of can the staged fracturing slide bushing assembly of switch repeatedly.
Background technology
Sleeve type staged fracturing technology is a kind of important means of unconventionaloil pool resource exploitation, and it is widely used in the fracturing yield increasing transformation of shale gas, hyposmosis payzone, the straight well of oil sheet, directional well, horizontal well.
At present, sliding sleeve of the prior art comprises ball-throwing type sliding sleeve, fluid pressure type sliding sleeve and mechanical switch sliding sleeve.Ball-throwing type sliding sleeve usually and open hole packer with the use of, for being slidably matched between sliding sleeve urceolus and core pipe, and on the wall of sliding sleeve urceolus, be furnished with pressure break hole slot.Its operating principle is, throws at well head the ball that builds the pressure, and the ball seat when the ball that builds the pressure arrives sliding sleeve position and in sliding sleeve is formed and seals, and realizes building the pressure.When pressure reaches certain value, cut off pin, the pressure break hole slot on sliding sleeve urceolus is opened and is set up pressure break passage.Fluid pressure type sliding sleeve is usually placed in the most next stage of fracturing strings, and its operating principle is, after having set all open hole packers, continues to suppress.After pressure reaches the opening pressure of fluid pressure type sliding sleeve, sliding sleeve is opened, and sets up circulation from that inside and outside sleeve pipe, then carries out pressing crack construction.Mechanical switch sliding sleeve needs same fracturing string G.I.H together usually, is characterized in being opened and closed by special switching tools, does not need throwing to build the pressure ball.
The pressure break progression of ball-throwing type sliding sleeve is determined by the quantity of the sliding sleeve accessed.Because sliding sleeve at different levels and the size of ball of building the pressure exist differential, therefore pressure break progression is restricted, and after pressure break completes, enters drilling tool and bore except sliding sleeve tee, add duty cycle and operating cost under needing.In addition, ball-throwing type sliding sleeve adopts the laminating of ball and ball seat and realizes sealing, and sealing contact surface is little and high to the withstand voltage properties requirement of sliding sleeve material, also high to the requirement on machining accuracy of sliding sleeve, adds the difficulty manufacturing sliding sleeve.
Fluid pressure type sliding sleeve can not use and use as ball-throwing type sliding sleeve, but can only separately for one-level, and need support the use with ball-throwing type sliding sleeve and complete multistage fracturing.
Mechanical switch sliding sleeve needs the switch being realized sliding sleeve by switching tools, and this requires that sliding sleeve and switching tools have good cooperation, simultaneously to the performance of switching tools and stability requirement higher.
Therefore, develop the unrestricted fracturing sliding bush of a kind of fractured layer figure place to have great importance.
Summary of the invention
For above-mentioned technical problem existing in prior art, the present invention proposes a kind of fracturing sliding bush assembly, its internal diameter is without differential thus the pressure break number of plies is unrestricted, and simple to operate.
According to the present invention, propose a kind of fracturing sliding bush assembly, comprise,
Housing, housing is furnished with the first pressure break hole, is configured with and axially extends and supporter isolated with inner walls towards upstream, be furnished with elastic component in the gap between housing and supporter at housing downstream sections inner side,
Be fixedly mounted on the sliding pawl cover in housing upstream portion, comprise the ratchet structure being arranged on described sliding pawl cover downstream end, a ratchet tooth positions place is being provided with an axial location groove at described ratchet place opening,
First sliding sleeve, comprise the first cylindrical body and at least one is arranged on the positioning rib of the first cylindrical body downstream part, described positioning rib radial direction is protruded the peripheral surface of the first cylindrical body and extends beyond its downstream edge from the first cylindrical body vertically, described first sliding sleeve is movably arranged on the inner downstream portion office of sliding pawl cover, described positioning rib is embedded in the locating slot of sliding pawl cover with manner
Rotating second sliding sleeve, comprise the second cylindrical body, described second cylindrical body is furnished with the second pressure break hole, the upstream end thereof of described second cylindrical body is formed as broached-tooth design, the each convex peak of broached-tooth design is aimed at the corresponding locating slot of described sliding pawl cover and is provided with the rotation rib that the top end face extended towards upstream is vertically inclined-plane at each convex peak position place of described broached-tooth design, described second sliding sleeve is arranged between sliding pawl cover and the supporter of housing, and the downstream part of described second cylindrical body to be inserted in the gap between described housing and supporter and is contacted with described elastic component,
Wherein, the contact of incline plane that the positioning rib of described first sliding sleeve can contact with the rotation rib of described second sliding sleeve or raise with the rotation direction along the second sliding sleeve of the broached-tooth design of described second sliding sleeve, the ratchet structure that the rotation rib of described second sliding sleeve can also overlap with sliding pawl engages
When being in original state, elastic component is in uncompressed state, the ends contact of the positioning rib in the locating slot that the rotation rib of the second sliding sleeve enters sliding pawl cover and with the first sliding sleeve, and the second pressure break hole at this moment on the second sliding sleeve deviates from the first pressure break hole on housing;
In order to open fracturing sliding bush assembly, apply towards the active force of the second sliding sleeve to the first sliding sleeve, rotation rib is ejected locating slot by described positioning rib, make the second sliding sleeve towards downstream movement and compression elastic piece, cause the second sliding sleeve to rotate, thus rotation rib is engaged with the groove of ratchet structure, and positioning rib aims at the inclined-plane of broached-tooth design, aliging with the second pressure break hole on the second sliding sleeve in the first pressure break hole now on housing, thus establishes pressure break passage;
In order to close fracturing sliding bush assembly, apply towards the active force of the second sliding sleeve to the first sliding sleeve, the inclined-plane of described positioning rib extruding broached-tooth design makes to rotate rib to be separated with the groove of ratchet structure, the second sliding sleeve is caused to rotate, making to rotate rib enters in next locating slot, therefore the first pressure break hole on housing is departed from the second pressure break hole on the second sliding sleeve, thus closes pressure break passage.
In this application, term " original state " refers to the state before fracturing sliding bush assembly is opened.It is upstream that term " downstream ", " upstream " are defined as near well head, is downstream away from well head.Term " uncompressed state " refers to that elastic component is in the state that can also be further compressed.
According to the present invention, the opening and closing of fracturing sliding bush assembly all do not need pitching, thus reduce the difficulty of processing of assembly.When using according to fracturing sliding bush assembly of the present invention, also no longer needing sliding sleeve tee to remove, thus shortening duty cycle, reducing operating cost.
In one embodiment, fracturing sliding bush assembly is full-bore.This means, fracturing sliding bush component internal do not reduce part, thus make fractured layer figure place unrestricted.
In one embodiment, each ratchet configuration be its double wedge from the upstream side locating slot in rotation direction than from the downstream locating slot in rotation direction more close to, and each trench of broached-tooth design is equal with the distance that adjacent two are rotated the center line of rib.
In this application, term " upstream of rotation direction ", " downstream of rotation direction " are defined as the upstream that backwards rotation direction is rotation direction, are the downstream of rotation direction towards rotation direction.
In one embodiment, the circumferential exterior surface of the broached-tooth design of the second sliding sleeve caves in inwards relative to the circumferential exterior surface radial direction of rotating rib.This structure makes the broached-tooth design of the second sliding sleeve can be inserted into the inside of sliding pawl cover, and make before opening fracturing sliding bush assembly, inner chamber and the external environment condition of fracturing sliding bush assembly are kept apart and prevent foreign matter from entering in fracturing sliding bush assembly inner chamber.
In a preferred embodiment, rotate rib and extend towards upstream from the end at each convex peak of broached-tooth design, the upstream portion of the second cylindrical body of the second sliding sleeve is configured with the tubular body extended towards upstream vertically that external diameter mates with the internal diameter of the first sliding sleeve.
The second sliding sleeve with described tubular body guarantees that the inner chamber of not only fracturing sliding bush assembly before opening fracturing sliding bush assembly and external environment condition are kept apart, even and if after opening fracturing sliding bush assembly the inner chamber of fracturing sliding bush assembly by means of only pressure break hole with external environment condition every being communicated with.This not only can prevent foreign matter from entering in fracturing sliding bush assembly inner chamber, can also ensure that the fracturing fluid in pressing crack construction process can not leak and then guarantee that pressing crack construction can normally carry out.
In one embodiment, positioning rib, locating slot are identical with the quantity of rotation rib.This structure makes the production of fracturing sliding bush assembly, assembling and more convenient to operate.
In one embodiment, supporter and shell composition body structure.This means, supporter is produced with housing for separating and then is assembled together.The Split type structure of supporter and housing enormously simplify the assembling according to fracturing sliding bush assembly of the present invention.
In one embodiment, positioning rib and the first sliding sleeve are formed in one, and/or described rotation rib and the second sliding sleeve are formed in one.A this shaping structure makes the production of the first sliding sleeve and the second sliding sleeve more simple, and its load carrying capacity is also stronger.
In one embodiment, the end structure contacted with rotation rib of positioning rib becomes the diminishing shape of size.This structure makes positioning rib less so that aim at the inclined-plane of the broached-tooth design of the second sliding sleeve with the contact surface rotated between rib.
In one embodiment, elastic component is spring.Adopt spring to make the production of fracturing sliding bush assembly more simple as elastic component, cost is also lower.
The invention still further relates to according to fracturing sliding bush assembly mentioned above for the application in the fracturing device of fracturing stratum.
Compared with prior art, the invention has the advantages that, the opening and closing of fracturing sliding bush assembly all do not need pitching, thus reduce the difficulty of processing of assembly.When using according to fracturing sliding bush assembly of the present invention, also no longer needing sliding sleeve tee to remove, thus shortening duty cycle, reducing operating cost.Because fracturing sliding bush assembly is full-bore, therefore fractured layer figure place is unrestricted, and is beneficial under later stage working liquids returns row and subsequent tool.In addition, axially-movable can be converted to rotation by fracturing sliding bush assembly according to the present invention, therefore only needs to apply the opening and closing that end thrust can realize fracturing sliding bush assembly on ground, greatly reduces Operating Complexity.Fracturing sliding bush assembly of the present invention is not only applicable to also be applicable at cementing conditions fracturing at bore hole condition fracturing, and range of application is wider.
Accompanying drawing explanation
Also will be described in more detail the present invention with reference to accompanying drawing based on embodiment hereinafter.Wherein:
Fig. 1 is the structural representation according to fracturing sliding bush assembly of the present invention;
Fig. 2 is the structural representation of fracturing sliding bush assembly according to the present invention in open mode;
Fig. 3 is the phantom drawing according to sliding pawl cover of the present invention;
Fig. 4 is the phantom drawing according to the first sliding sleeve of the present invention;
Fig. 5 is the phantom drawing of the first embodiment according to the second sliding sleeve of the present invention;
Fig. 6 is the phantom drawing of the second embodiment according to the second sliding sleeve of the present invention;
Fig. 7 is the position view of the ratchet structure in Fig. 3 and the broached-tooth design in Fig. 5 or 6;
Fig. 8-11 is the process schematic opening and closing the fracturing sliding bush assembly using the second sliding sleeve shown in Fig. 5.
In the drawings, identical component is indicated by identical Reference numeral.Accompanying drawing is not according to the scale of reality.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 show schematically show according to fracturing sliding bush assembly 10 of the present invention.Fracturing sliding bush assembly 10 comprises housing 11 and is arranged in the downstream of housing 11 and the joint 14 be connected with housing 11.Housing 11 is furnished with the first pressure break hole 18.In one embodiment, the outer wall of joint 14 is furnished with external screw thread, housing 11 downstream inner wall is furnished with corresponding internal thread, to realize the connection of joint 14 and housing 11.In a preferred embodiment, joint 14 is also included in the supporter 13 that its upstream end thereof extends towards upstream vertically.As shown in Figure 1, supporter 13 is in the inside of housing 11 and spaced apart with housing 11, be furnished with elastic component in interval preferably between supporter 13 and housing 11, such as spring 12 can move vertically to make the second sliding sleeve 50,50 ' hereinafter described.In a unshowned embodiment, housing 11 and joint 14 and supporter 13 can also be integrally formed.
Fracturing sliding bush assembly 10 also comprises sliding pawl cover 30 as shown in Figure 3.Sliding pawl cover 30 is fixedly connected in the upstream end thereof of housing 11.In one embodiment, this connection is realized by screw thread.The downstream end of sliding pawl cover 30 is provided with ratchet structure 36, and at ratchet tooth positions, a ratchet is provided with a locating slot extended vertically 35.As shown in Figure 3, locating slot 35 at ratchet place opening to realize the switching movements of fracturing sliding bush assembly 10 hereinafter described.
Fracturing sliding bush assembly 10 also comprises the first sliding sleeve 40 as shown in Figure 4.First sliding sleeve 40 comprises the first cylindrical body 41 and positioning rib 42.Positioning rib 42 be arranged on the first cylindrical body 41 downstream part and be configured to radial protrude the first cylindrical body 41 peripheral surface and extend axially beyond the downstream edge of the first cylindrical body 41.In one embodiment, the first cylindrical body 41 and positioning rib 42 are formed in one.Preferably, the downstream end of positioning rib 42 is configured to the diminishing shape of size.
Fracturing sliding bush assembly 10 also comprises the second sliding sleeve.Fig. 5 shows the first embodiment 50 of the second sliding sleeve.Wherein, the second sliding sleeve 50 comprises the second cylindrical body 51 and is arranged in the broached-tooth design 52 of upstream end thereof of the second cylindrical body 51.Second cylindrical body 51 is furnished with the second pressure break hole 56.The each convex peak 54 of broached-tooth design 52 is aimed at the corresponding locating slot 35 of sliding pawl cover 30 and is provided with the rotation rib 59 extended towards upstream vertically in position, each convex peak 54.The top end face rotating rib 59 is inclined-plane, and make in the switching process of fracturing sliding bush assembly 10 hereinafter described, the second sliding sleeve 50 can be subject to circumferential active force and rotate.
It can also be seen that in the embodiment shown in fig. 5, the top of rotating the ramp type of rib 59 is connected with the trench 55 of broached-tooth design 52 with smooth manner.Understandably, the top of rotating the ramp type of rib 59 also can not be connected with the trench 55 of broached-tooth design 52 but protrude the upstream portion at broached-tooth design 52.In addition, the circumferential exterior surface of rotating rib 59 is in identical circumferential exterior surface with the circumferential exterior surface of the second cylindrical body 51, and the circumferential exterior surface 53 of broached-tooth design 52 inwards depression radial relative to the circumferential exterior surface of the second cylindrical body 51 makes to rotate the circumferential exterior surface 53 of rib 59 relative to broached-tooth design 52 in relief-type.That is, the circumferential exterior surface 53 of rotating rib 59 and broached-tooth design 52 is in different ring surfaces.In one embodiment, the second cylindrical body 51 and rotation rib 59 are formed in one.
Fig. 6 shows the second embodiment 50 ' of the second sliding sleeve.The structure of the second sliding sleeve 50 ' is substantially identical with the structure of the second sliding sleeve 50, difference is, rotate rib 59 ' to extend from the end at each convex peak 54 ' of broached-tooth design towards upstream, namely rotate trench 55 ' that the ramp type top of rib 59 ' is in position compared with upstream and broached-tooth design 52 ' and be in position compared with downstream, and the top of rotating rib 59 ' ramp type is not with trench 55 ' for be connected, and the circumferential exterior surface of rotating rib 59 ', broached-tooth design 52 ' and the second cylindrical body 51 ' is in identical ring surface; The upstream portion of the second cylindrical body 51 ' of other second sliding sleeve 50 ' is configured with the tubular body 60 extended towards upstream vertically.The external diameter of tubular body 60 mates with the internal diameter of the first sliding sleeve 40 and makes to rotate rib 59 ', broached-tooth design 52 ' in relief-type, and that is the circumferential exterior surface of tubular body 60 is in not identical ring surface with the circumferential exterior surface of the second cylindrical body 51 '.
Importantly, the positioning rib 42 of the first sliding sleeve 40 is configured to aim at and the rotation direction along the second sliding sleeve 50 of the broached-tooth design 52 of the second sliding sleeve 50 and the inclined-plane that raises.In one embodiment, relative to the rotation direction of the second sliding sleeve 50, each ratchet structure all make into its double wedge from rotation direction upstream side locating slot than from the downstream locating slot in rotation direction more close to.Fig. 7 show schematically show the plan view of the ratchet of this structure, and wherein arrow shows the rotation direction of the second sliding sleeve 50.The double wedge 37 of the ratchet of sliding pawl cover 30 is less than the circumferential distance L2 apart from locating slot 35 ' center line apart from the circumferential distance L1 of locating slot 35 center line, i.e. L1<L2.The trench 55 of the broached-tooth design 52 of the second sliding sleeve 50 rotates rib 59 apart from the circumferential distance L3 rotating rib 59 center line (or convex peak 54) with distance " the circumferential distance L4 of center line (or convex peak 54 ") is equal, i.e. L3=L4.This structure can ensure the switching movements of fracturing sliding bush assembly 10.
Describe the structure of fracturing sliding bush assembly 10 in confined state according to Fig. 1 below, the second sliding sleeve is chosen as the second sliding sleeve 50 shown in Fig. 5 here.Housing 11 and joint 14 are joined together to form the drum of fracturing sliding bush assembly 10.Preferably, before being connected with joint 14 by housing 11, the lateral wall of the supporter 13 of joint 14 arranges elastic component 12, like this after being assembled by housing 11, elastic component 12 is in the gap between housing 11 and supporter 13 just.According to the order swimming over to upstream from down, in housing 11, arrange the second sliding sleeve 50, first sliding sleeve 40 and sliding pawl cover 30 successively.It should be noted that, sliding pawl cover 30 is fixedly connected with housing 11.First sliding sleeve 40 is with in the sliding pawl cover 30 of movable installation, and its positioning rib 42 embeds in the locating slot 35 of sliding pawl cover 30 with manner.Second sliding sleeve 50 to rotate in locating slot 35 that rib 59 enters sliding pawl cover 30 and the ends contact of positioning rib 42 with the first sliding sleeve 40, and the downstream part of the second cylindrical body 51 of the second sliding sleeve 50 to be inserted in the gap between housing 11 and supporter 13 and contacted with elastic component 12.In a preferred embodiment, positioning rib 42, locating slot 35 are identical with the quantity of rotating rib 59, and this can make assembling process more simple, also can facilitate operation below.
Multiple fracturing sliding bush assembly 10 according to the present invention is used in the fracturing device of fracturing stratum.In this applications, fracturing sliding bush assembly 10 is full-bore thus fractured layer figure place is unrestricted.
Below by according to Fig. 1,2 and Fig. 8-11 opening procedure and the closing process of fracturing sliding bush assembly 10 are described.Wherein, the second sliding sleeve is chosen as the second sliding sleeve 50 shown in Fig. 5.
When original state, elastic component 12 is in uncompressed state and by the second sliding sleeve 50 jack-up.The ends contact of the positioning rib 42 in the locating slot 35 that the rotation rib 59 of the second sliding sleeve 50 enters sliding pawl cover 30 and with the first sliding sleeve 40, as shown in Figure 8.At this moment, the broached-tooth design 53 of the second sliding sleeve 50 is inserted in sliding pawl cover 30, and the first pressure break hole 18 on housing 11 is departed from the second pressure break hole 56 on the second sliding sleeve 50.
When opening fracturing sliding bush assembly 10, the first sliding sleeve 40 is applied towards the active force of the second sliding sleeve 50.Under this active force, rotation rib 59 is ejected locating slot 35 by positioning rib 42.Because the top end face rotating rib 59 is inclined-plane, therefore while downstream movement, be also subject to peripheral force at the second sliding sleeve 50, and the circumference therefore achieving the second sliding sleeve 50 is rotated, elastic component 12 is compressed in this stage, as shown in Figure 9.After rotation rib 59 removes locating slot 35, namely can contact with to ratcheted ramp 34.Under the tension force effect of elastic component 12 and the guiding function of ratcheted ramp 34, the second sliding sleeve 50 is rotated further until rotate rib 59 and engage with the groove that sliding pawl overlaps 30 ratchet structures, and positioning rib 42 aims at the inclined-plane 52 of broached-tooth design, as shown in Figure 10.At this moment, align with the second pressure break hole 56 on the second sliding sleeve 50 thus set up pressure break passage in the first pressure break hole 18 on housing 11, as shown in Figure 2.
When closing fracturing sliding bush assembly 10, the first sliding sleeve 40 is applied towards the active force of the second sliding sleeve 50.Under this active force, inclined-plane 52, second sliding sleeve 50 that positioning rib 42 extrudes broached-tooth design makes rotation rib 59 separate with the groove of ratchet structure towards downstream movement, and under the effect on the inclined-plane 52 of broached-tooth design, second sliding sleeve 50 rotates simultaneously, as shown in figure 11.After the second sliding sleeve 50 removes the groove of ratchet structure, namely can with next contact of incline plane of ratchet, and under the tension force effect of elastic component 12 and the guiding function on this inclined-plane 34 of ratchet, second sliding sleeve 50 is rotated further until rotate rib 59 and enter in next locating slot (not shown), and elastic component 12 also reverts to uncompressed state.At this moment, the first pressure break hole 18 on housing 11 is departed from the second pressure break hole 56 on the second sliding sleeve 50, thus closes pressure break passage, and fracturing sliding bush assembly 10 turns back to the state of Fig. 8.
Although invention has been described with reference to preferred embodiment, without departing from the scope of the invention, various improvement can be carried out to it and parts wherein can be replaced with equivalent.Especially, only otherwise there is structural hazard, the every technical characteristic mentioned in each embodiment all can combine in any way.The present invention is not limited to specific embodiment disclosed in literary composition, but comprises all technical schemes fallen in the scope of claim.
Claims (10)
1. a fracturing sliding bush assembly, comprises,
Housing, housing is furnished with the first pressure break hole, is configured with and axially extends and supporter isolated with inner walls towards upstream, be furnished with elastic component in the gap between housing and supporter at housing downstream sections inner side,
Be fixedly mounted on the sliding pawl cover in housing upstream portion, comprise the ratchet structure being arranged on described sliding pawl cover downstream end, a ratchet tooth positions place is being provided with an axial location groove at described ratchet place opening,
First sliding sleeve, comprise the first cylindrical body and at least one is arranged on the positioning rib of the first cylindrical body downstream part, described positioning rib radial direction is protruded the peripheral surface of the first cylindrical body and extends beyond its downstream edge from the first cylindrical body vertically, described first sliding sleeve is movably arranged on the inner downstream portion office of sliding pawl cover, described positioning rib is embedded in the locating slot of sliding pawl cover with manner
Rotating second sliding sleeve, comprise the second cylindrical body, described second cylindrical body is furnished with the second pressure break hole, the upstream end thereof of described second cylindrical body is formed as broached-tooth design, the each convex peak of broached-tooth design is aimed at the corresponding locating slot of described sliding pawl cover and is provided with the rotation rib that the top end face extended towards upstream is vertically inclined-plane at each convex peak position place of described broached-tooth design, described second sliding sleeve is arranged between sliding pawl cover and the supporter of housing, and the downstream part of described second cylindrical body to be inserted in the gap between described housing and supporter and is contacted with described elastic component,
Wherein, the contact of incline plane that the positioning rib of described first sliding sleeve can contact with the rotation rib of described second sliding sleeve or raise with the rotation direction along the second sliding sleeve of the broached-tooth design of described second sliding sleeve, the ratchet structure that the rotation rib of described second sliding sleeve can also overlap with sliding pawl engages
When being in original state, elastic component is in uncompressed state, the ends contact of the positioning rib in the locating slot that the rotation rib of the second sliding sleeve enters sliding pawl cover and with the first sliding sleeve, and the second pressure break hole at this moment on the second sliding sleeve deviates from the first pressure break hole on housing;
In order to open fracturing sliding bush assembly, apply towards the active force of the second sliding sleeve to the first sliding sleeve, rotation rib is ejected locating slot by described positioning rib, make the second sliding sleeve towards downstream movement and compression elastic piece, cause the second sliding sleeve to rotate, thus rotation rib is engaged with the groove of ratchet structure, and positioning rib aims at the inclined-plane of broached-tooth design, aliging with the second pressure break hole on the second sliding sleeve in the first pressure break hole now on housing, thus establishes pressure break passage;
In order to close fracturing sliding bush assembly, apply towards the active force of the second sliding sleeve to the first sliding sleeve, the inclined-plane of described positioning rib extruding broached-tooth design makes to rotate rib to be separated with the groove of ratchet structure, the second sliding sleeve is caused to rotate, making to rotate rib enters in next locating slot, therefore the first pressure break hole on housing is departed from the second pressure break hole on the second sliding sleeve, thus closes pressure break passage.
2. fracturing sliding bush assembly according to claim 1, it is characterized in that, each described ratchet configuration be its double wedge from the upstream side locating slot in rotation direction than from the downstream locating slot in rotation direction more close to, and each trench of described broached-tooth design is equal with the distance that adjacent two are rotated the center line of rib.
3. fracturing sliding bush assembly according to claim 1 and 2, is characterized in that, the circumferential exterior surface of the broached-tooth design of described second sliding sleeve caves in inwards relative to the circumferential exterior surface radial direction of described rotation rib.
4. fracturing sliding bush assembly according to claim 1 and 2, it is characterized in that, described rotation rib extends from the end at each convex peak of broached-tooth design towards upstream, and the upstream portion of the second cylindrical body of described second sliding sleeve is configured with the tubular body extended towards upstream vertically that external diameter mates with the internal diameter of the first sliding sleeve.
5. fracturing sliding bush assembly according to claim 1, is characterized in that, described positioning rib, locating slot are identical with the quantity of rotation rib.
6. fracturing sliding bush assembly according to claim 1, is characterized in that, described supporter and shell composition body structure.
7. fracturing sliding bush assembly according to claim 1, is characterized in that, described positioning rib and the first sliding sleeve are formed in one, and/or described rotation rib and the second sliding sleeve are formed in one.
8. fracturing sliding bush assembly according to claim 1, is characterized in that, the end structure contacted with described rotation rib of described positioning rib becomes the diminishing shape of size.
9. fracturing sliding bush assembly according to claim 1, is characterized in that, described fracturing sliding bush assembly is full-bore.
10. the fracturing sliding bush assembly according to any one of the claims is for the application in the fracturing device of fracturing stratum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210244529.9A CN103541709B (en) | 2012-07-13 | 2012-07-13 | Fracturing sliding bush assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210244529.9A CN103541709B (en) | 2012-07-13 | 2012-07-13 | Fracturing sliding bush assembly |
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| Publication Number | Publication Date |
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| CN103541709A CN103541709A (en) | 2014-01-29 |
| CN103541709B true CN103541709B (en) | 2016-01-06 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103982167B (en) * | 2014-05-23 | 2016-10-05 | 湖南唯科拓石油科技服务有限公司 | A kind of full-bore pitching sliding sleeve staged fracturing equipment |
| CN105484718B (en) * | 2014-09-26 | 2018-05-08 | 中国石油化工股份有限公司 | Slide bushing assembly and fracturing string |
| CN104847325B (en) * | 2015-05-15 | 2017-11-10 | 中国海洋石油总公司 | It is a kind of mechanically or hydraulically to trigger infinite stages segmentation transformation sliding bush apparatus |
| CN106545323B (en) * | 2015-09-18 | 2019-04-05 | 中国石油化工股份有限公司 | Fracturing device for oil gas tubing string |
| CN105298461B (en) * | 2015-11-03 | 2017-09-26 | 东北石油大学 | The unlimited solvable ball fracturing sliding bush of full-bore |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202125287U (en) * | 2011-06-22 | 2012-01-25 | 中国石油化工股份有限公司 | Anchor fluke type sliding sleeve opening tool |
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| US6907936B2 (en) * | 2001-11-19 | 2005-06-21 | Packers Plus Energy Services Inc. | Method and apparatus for wellbore fluid treatment |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202125287U (en) * | 2011-06-22 | 2012-01-25 | 中国石油化工股份有限公司 | Anchor fluke type sliding sleeve opening tool |
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