CN103541709A - Fracturing sliding sleeve assembly - Google Patents
Fracturing sliding sleeve assembly Download PDFInfo
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- CN103541709A CN103541709A CN201210244529.9A CN201210244529A CN103541709A CN 103541709 A CN103541709 A CN 103541709A CN 201210244529 A CN201210244529 A CN 201210244529A CN 103541709 A CN103541709 A CN 103541709A
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Abstract
The invention relates to a fracturing sliding sleeve assembly which comprises a case, a sliding claw sleeve, a first sliding sleeve and a second sliding sleeve. The sliding claw sleeve, the first sliding sleeve and the second sliding sleeve are installed in the case. A ratchet wheel structure and a locating groove of the sliding claw sleeve, a locating rib on the first sliding sleeve and a rotating rib on the second sliding sleeve are used cooperatively so that the fracturing sliding sleeve assembly can be opened and closed. The fracturing sliding sleeve enables the number of fracturing layers to be free of limitation, and is simple to operate and wide in application range.
Description
Technical field
The present invention relates to a kind of fracturing sliding bush assembly, particularly a kind of staged fracturing slide bushing assembly of switch repeatedly.
Background technology
Sleeve type staged fracturing technology is a kind of important means of non-conventional gas and oil resource exploitation, and it is widely used in straight well, the directional well of shale gas, hyposmosis payzone, oil sheet, the transformation of the fracturing yield increasing of horizontal well.
At present, sliding sleeve of the prior art comprises ball-throwing type sliding sleeve, fluid pressure type sliding sleeve and mechanical switch formula sliding sleeve.Ball-throwing type sliding sleeve conventionally and open hole packer be used in conjunction with, between sliding sleeve urceolus and core pipe, for being slidably matched, and on the wall of sliding sleeve urceolus, be furnished with pressure break hole slot.Its operating principle is, at well head, throws in the ball that builds the pressure, when the ball that builds the pressure arrives sliding sleeve position with sliding sleeve in ball seat form and seal, realization builds 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 next stage of fracturing strings, and its operating principle is, after having set all open hole packers, to continue 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 formula sliding sleeve need to be characterized in opening and closing by special-purpose switching tools with fracturing string together G.I.H conventionally, does not need to throw the ball that builds the pressure.
The pressure break progression of ball-throwing type sliding sleeve is determined by the quantity of the sliding sleeve accessing.Because sliding sleeves at different levels and the size of ball of building the pressure exist differentially, so pressure break progression is restricted, and after pressure break completes, need be lowered to drilling tool and bore except sliding sleeve tee, increased duty cycle and operating cost.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, has increased the difficulty of manufacturing sliding sleeve.
Fluid pressure type sliding sleeve can not be used as ball-throwing type sliding sleeve and use, but can only be separately for one-level, and need to support the use with ball-throwing type sliding sleeve and complete multistage fracturing.
Mechanical switch sliding sleeve need to be realized by switching tools the switch of sliding sleeve, and this requires sliding sleeve and switching tools to have good cooperation, simultaneously higher to the performance of switching tools and stability requirement.
Therefore, developing the unrestricted fracturing sliding bush of a kind of fractured layer figure place has great importance.
Summary of the invention
For existing above-mentioned technical problem in prior art, the present invention proposes a kind of fracturing sliding bush assembly, thereby its internal diameter is unrestricted without the differential pressure break number of plies, and simple to operate.
According to the present invention, a kind of fracturing sliding bush assembly has been proposed, comprise,
Housing is furnished with the first pressure break hole on housing, in housing downstream part inner side, be configured with axially towards upstream, extend and with the isolated supporter of inner walls, in the gap between housing and supporter, be furnished with elastic component,
Be fixedly mounted on the sliding pawl cover in housing upstream portion, comprise the ratchet structure that is arranged on described sliding pawl cover downstream end, every a ratchet double wedge position, be provided with one at the axial location groove of described ratchet place opening,
The first sliding sleeve, comprise that the first cylindrical body and at least one are arranged on the positioning rib of the first cylindrical body downstream part, described positioning rib radially protrudes the peripheral surface of the first cylindrical body and from the first cylindrical body, extends beyond its downstream edge vertically, described the first sliding sleeve is movably arranged on sliding pawl and overlaps inner downstream portion office, described positioning rib is embedded in the locating slot of sliding pawl cover with manner
Rotating the second sliding sleeve, comprise the second cylindrical body, in described the second cylindrical body, be furnished with the second pressure break hole, the end, upstream of described the second cylindrical body forms broached-tooth design, the protruding peak of each of broached-tooth design is aimed at the corresponding locating slot of described sliding pawl cover and at each place, protruding peak position of described broached-tooth design, is provided with the rotation rib that the top end face that extends towards upstream is vertically inclined-plane, described the second sliding sleeve is arranged between sliding pawl cover and the supporter of housing, and the downstream part of described the second cylindrical body is inserted in the gap between described housing and supporter and with described elastic component and is contacted,
Wherein, the positioning rib of described the first sliding sleeve can touch with the rotation ribbed joint of described the second sliding sleeve or the inclined-plane that raises with the rotation direction along the second sliding sleeve of the broached-tooth design of described the second sliding sleeve contacts, the rotation rib of described the second sliding sleeve can also engage with the ratchet structure of sliding pawl cover
When in original state, elastic component is in uncompressed state, and the rotation rib of the second sliding sleeve enters in the locating slot of sliding pawl cover and contacts with the end of the positioning rib of the first sliding sleeve, and at this moment the second pressure break hole on the second sliding sleeve deviates from the first pressure break hole on housing;
In order to open fracturing sliding bush assembly, the first sliding sleeve is applied to the active force towards the second sliding sleeve, described positioning rib ejects locating slot by rotation rib, make the second sliding sleeve towards downstream motion and compression elastic piece, cause the second sliding sleeve to rotate, thereby make to rotate rib, engage with the groove of ratchet structure, and positioning rib is aimed at the inclined-plane of broached-tooth design, now align with the second pressure break hole on the second sliding sleeve in the first pressure break hole on housing, thereby set up pressure break passage;
In order to close fracturing sliding bush assembly, the first sliding sleeve is applied to the active force towards the second 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, cause the second sliding sleeve 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, thereby has closed 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 " ”,“ upstream, downstream " is defined as near well head, away from well head, is downstream.Term " uncompressed state " refers to the state of elastic component in being further compressed.
According to the present invention, the opening and closing of fracturing sliding bush assembly all do not need pitching, thereby have reduced the difficulty of processing of assembly.When using according to fracturing sliding bush assembly of the present invention, also no longer need sliding sleeve tee to remove, thereby shortened duty cycle, reduced operating cost.
In one embodiment, fracturing sliding bush assembly is full-bore.This means, fracturing sliding bush component internal do not dwindle part, thereby make fractured layer figure place unrestricted.
In one embodiment, each ratchet be configured to its double wedge from the upstream side locating slot in rotation direction than the downstream locating slot in rotation direction more close to, and each trench of broached-tooth design equates with the distances of the center line of adjacent two rotation ribs.
In this application, term " upstream of rotation direction ", " downstream of rotation direction " are defined as the upstream that backwards rotation direction is rotation direction, the downstream that is rotation direction towards rotation direction.
In one embodiment, the circumferential exterior surface of the broached-tooth design of the second sliding sleeve radially caves in inwards with respect to the circumferential exterior surface 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, makes before opening fracturing sliding bush assembly, and the inner chamber of fracturing sliding bush assembly and external environment condition are kept apart and prevented that 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 protruding peak of broached-tooth design, the upstream portion of the second cylindrical body of the second sliding sleeve is configured with the tubular body extending towards upstream vertically that external diameter mates with the internal diameter of the first sliding sleeve.
With the second sliding sleeve of described tubular body, guarantee that not only the inner chamber of fracturing sliding bush assembly and external environment condition are kept apart before opening fracturing sliding bush assembly, even and after opening fracturing sliding bush assembly fracturing sliding bush assembly inner chamber only by pressure break hole with external environment condition every being communicated with.This not only can prevent that foreign matter from entering in fracturing sliding bush assembly inner chamber, can also guarantee 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 production, the assembling and more convenient to operate of fracturing sliding bush assembly.
In one embodiment, supporter becomes Split type structure with housing.This means, supporter is produced and then is assembled together for separating with housing.The Split type structure of supporter and housing has been simplified greatly according to the assembling of 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.The structure of a this moulding makes the production of the first sliding sleeve and the second sliding sleeve simpler, and its load-bearing ability is also stronger.
In one embodiment, the end structure tactile with rotating ribbed joint 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 rotating 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 the application at the fracturing device for fracturing stratum according to fracturing sliding bush assembly mentioned above.
Compared with prior art, the invention has the advantages that, the opening and closing of fracturing sliding bush assembly all do not need pitching, thereby have reduced the difficulty of processing of assembly.When using according to fracturing sliding bush assembly of the present invention, also no longer need sliding sleeve tee to remove, thereby shortened duty cycle, reduced operating cost.Because fracturing sliding bush assembly is full-bore, so fractured layer figure place is unrestricted, and be beneficial to later stage operation liquid return row and subsequent tool be lowered to.In addition, fracturing sliding bush assembly according to the present invention can be converted to rotation by axially-movable, therefore only need on ground, apply the opening and closing that end thrust can realize fracturing sliding bush assembly, 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
To the present invention, be described in more detail based on embodiment and with reference to accompanying drawing hereinafter.Wherein:
Fig. 1 is according to the structural representation of fracturing sliding bush assembly of the present invention;
Fig. 2 is that fracturing sliding bush assembly according to the present invention is at the structural representation of open mode;
Fig. 3 is according to the phantom drawing of sliding pawl cover of the present invention;
Fig. 4 is according to the phantom drawing of the first sliding sleeve of the present invention;
Fig. 5 is according to the phantom drawing of the first embodiment of the second sliding sleeve of the present invention;
Fig. 6 is according to the phantom drawing of the second embodiment of the second sliding sleeve of the present invention;
Fig. 7 is ratchet structure in Fig. 3 and the position view of the broached-tooth design in Fig. 5 or 6;
Fig. 8-11st, the process schematic diagram of the fracturing sliding bush assembly of the second sliding sleeve shown in Fig. 5 is used in opening and closing.
In the drawings, identical member is indicated by identical Reference numeral.Accompanying drawing is not according to actual scale.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 has schematically shown 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 being connected with housing 11.On housing 11, be furnished with the first pressure break hole 18.In one embodiment, on the outer wall of joint 14, be furnished with external screw thread, in housing 11 downstream inner wall, be furnished with corresponding internal thread, to realize being connected of joint 14 and housing 11.In a preferred embodiment, joint 14 also comprises the supporter 13 that portion extends towards upstream vertically at its upstream end.As shown in Figure 1, the inside of supporter 13 in housing 11 and spaced apart with housing 11, preferably in the interval between supporter 13 and housing 11, be furnished with elastic component, for example spring 12 is so that the second sliding sleeve 50,50 ' hereinafter described can move vertically.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 end, upstream of housing 11.In one embodiment, can realize this connection by screw thread.Downstream end at sliding pawl cover 30 is provided with ratchet structure 36, and at interval of a ratchet, is provided with a locating slot 35 extending vertically in ratchet double wedge position.As shown in Figure 3, locating slot 35 moves to realize the switch of fracturing sliding bush assembly 10 hereinafter described at ratchet place opening.
Fracturing sliding bush assembly 10 also comprises the first sliding sleeve 40 as shown in Figure 4.The first sliding sleeve 40 comprises the first cylindrical body 41 and positioning rib 42.The downstream edge that positioning rib 42 is arranged on the first cylindrical body 41 downstream parts and is configured to radially to protrude the peripheral surface of the first cylindrical body 41 and extends beyond vertically 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 has shown the first embodiment 50 of the second sliding sleeve.Therein, the second sliding sleeve 50 comprises the second cylindrical body 51 and the broached-tooth design 52 that is arranged in the end, upstream of the second cylindrical body 51.In the second cylindrical body 51, be furnished with the second pressure break hole 56.Each protruding peak 54 of broached-tooth design 52 is aimed at the corresponding locating slot 35 of sliding pawl cover 30 and in each 54 position, protruding peak, is provided with the rotation rib 59 extending towards upstream vertically.The top end face that rotates rib 59 is inclined-plane, makes in the switching process of fracturing sliding bush assembly 10 hereinafter described, and 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 the ramp type of rotation 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, rotate the circumferential exterior surface of rib 59 with the circumferential exterior surface of the second cylindrical body 51 in identical circumferential exterior surface, and the circumferential exterior surface 53 of broached-tooth design 52 radially caves in inwards and makes to rotate rib 59 and be embossment shape with respect to the circumferential exterior surface 53 of broached-tooth design 52 with respect to the circumferential exterior surface of the second cylindrical body 51.That is to say, rotate the circumferential exterior surface 53 of rib 59 and broached-tooth design 52 in different ring surfaces.In one embodiment, the second cylindrical body 51 and rotation rib 59 are formed in one.
Fig. 6 has shown the second embodiment 50 ' of the second sliding sleeve.The structure of the structure of the second sliding sleeve 50 ' and the second sliding sleeve 50 is basic identical, difference is, rotating rib 59 ' extends towards upstream from each 54’ end, protruding peak of broached-tooth design, the ramp type top of rotating rib 59 ' in compared with the position of upstream and the trench 55 ' of broached-tooth design 52 ' in compared with the position in downstream, and the circumferential exterior surface of rib 59 ', broached-tooth design 52 ' and the second cylindrical body 51 ' for not being connected, is rotated with trench 55 ' in identical ring surface in the top of rotation rib 59 ' ramp type; The upstream portion of the second cylindrical body 51 ' of other the second sliding sleeve 50 ' is configured with the tubular body 60 extending towards upstream vertically.The external diameter of tubular body 60 mate with the internal diameter of the first sliding sleeve 40 make to rotate rib 59 ', broached-tooth design 52 ' is embossment shape, that is to say that the circumferential exterior surface of tubular body 60 and the circumferential exterior surface of the second cylindrical body 51 ' are in not identical ring surface.
Importantly, the positioning rib 42 of the first sliding sleeve 40 is configured to aim at the inclined-plane raising with the rotation direction along the second sliding sleeve 50 of the broached-tooth design 52 of the second sliding sleeve 50.In one embodiment, with respect to the rotation direction of the second sliding sleeve 50, each ratchet structure all make into its double wedge from the upstream side locating slot in rotation direction than the downstream locating slot in rotation direction more close to.Fig. 7 has schematically shown the plan view of the ratchet of this structure, and wherein arrow has shown the rotation direction of the second sliding sleeve 50.The double wedge 37 of the ratchet of sliding pawl cover 30 is less than apart from the circumferential distance L2 of locating slot 35 ' center line, i.e. L1<L2 apart from the circumferential distance L1 of locating slot 35 center lines.The trench 55 of the broached-tooth design 52 of the second sliding sleeve 50 apart from rotate the circumferential distance L3 of rib 59 center lines (or protruding peak 54) with apart from rotation rib 59 " the circumferential distance L4 of center line (or protruding peak 54 ") is for equating, i.e. L3=L4.This structure can guarantee the switch motion of fracturing sliding bush assembly 10.
According to Fig. 1, describe the structure of fracturing sliding bush assembly 10 in confined state 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 housing 11 is connected with joint 14, on the lateral wall of the supporter 13 of joint 14, arrange elastic component 12, like this after by housing 11 assemblings, elastic component 12 is just in the gap between housing 11 and supporter 13.According to the order of swimming over to upstream from down, the second sliding sleeve 50, the first sliding sleeve 40 and sliding pawl cover 30 in housing 11, have been arranged successively.It should be noted that, sliding pawl cover 30 is fixedly connected with housing 11.The 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.The second sliding sleeve 50 rotates that ribs 59 enter in the locating slot 35 of sliding pawl cover 30 and contact with the end of the positioning rib 42 of the first sliding sleeve 40, in the downstream part insertion housing 11 of the second cylindrical body 51 of the second sliding sleeve 50 and the gap between supporter 13 and contact 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 simpler, also can facilitate operation below.
A plurality of fracturing sliding bush assemblies 10 according to the present invention are used in the fracturing device of fracturing stratum.In this application, thereby fracturing sliding bush assembly 10 is that full-bore 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.Therein, 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 rotation rib 59 of the second sliding sleeve 50 enters in the locating slot 35 of sliding pawl cover 30 and contacts with the end of the positioning rib 42 of 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.
While opening fracturing sliding bush assembly 10, the first sliding sleeve 40 is applied to the active force towards the second sliding sleeve 50.Under this active force, positioning rib 42 ejects locating slot 35 by rotation rib 59.Owing to rotating the top end face of rib 59, be inclined-plane, therefore at the second sliding sleeve 50, in the motion of downstream, be also subject to peripheral force, and therefore realized the circumferential rotation of the second sliding sleeve 50, compressed at this stage Elastic part 12, as shown in Figure 9.When rotating rib 59, remove after locating slot 35, can with to ratchet inclined-plane 34, contact.Under the tension force effect of elastic component 12 and the guiding function on ratchet inclined-plane 34, the second sliding sleeve 50 is rotated further until rotate rib 59 and engages with the groove that sliding pawl overlaps 30 ratchet structures, and the inclined-plane 52 of positioning rib 42 aligning broached-tooth designs, as shown in figure 10.At this moment, thus the first pressure break hole 18 on housing 11 align and set up pressure break passage with the second pressure break hole 56 on the second sliding sleeve 50, as shown in Figure 2.
While closing fracturing sliding bush assembly 10, the first sliding sleeve 40 is applied to the active force towards the second sliding sleeve 50.Under this active force, inclined-plane 52, the second sliding sleeves 50 of positioning rib 42 extruding broached-tooth designs make to rotate rib 59 towards downstream motion to be separated with the groove of ratchet structure, and under the effect on the inclined-plane 52 of broached-tooth design, the second sliding sleeve 50 rotates simultaneously, as shown in figure 11.When the second sliding sleeve 50 is removed after the groove of ratchet structure, can contact with next inclined-plane of ratchet, and under the tension force effect of elastic component 12 and the guiding function on this inclined-plane 34 of ratchet, the 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, thereby 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, can carry out various improvement and can replace parts wherein with equivalent it.Especially, only otherwise have structural hazard, every technical characterictic of mentioning in each embodiment all can combine in any way.The present invention is not limited to disclosed specific embodiment in literary composition, but comprises all technical schemes in the scope that falls into claim.
Claims (10)
1. a fracturing sliding bush assembly, comprises,
Housing is furnished with the first pressure break hole on housing, in housing downstream part inner side, be configured with axially towards upstream, extend and with the isolated supporter of inner walls, in the gap between housing and supporter, be furnished with elastic component,
Be fixedly mounted on the sliding pawl cover in housing upstream portion, comprise the ratchet structure that is arranged on described sliding pawl cover downstream end, every a ratchet double wedge position, be provided with one at the axial location groove of described ratchet place opening,
The first sliding sleeve, comprise that the first cylindrical body and at least one are arranged on the positioning rib of the first cylindrical body downstream part, described positioning rib radially protrudes the peripheral surface of the first cylindrical body and from the first cylindrical body, extends beyond its downstream edge vertically, described the first sliding sleeve is movably arranged on sliding pawl and overlaps inner downstream portion office, described positioning rib is embedded in the locating slot of sliding pawl cover with manner
Rotating the second sliding sleeve, comprise the second cylindrical body, in described the second cylindrical body, be furnished with the second pressure break hole, the end, upstream of described the second cylindrical body forms broached-tooth design, the protruding peak of each of broached-tooth design is aimed at the corresponding locating slot of described sliding pawl cover and at each place, protruding peak position of described broached-tooth design, is provided with the rotation rib that the top end face that extends towards upstream is vertically inclined-plane, described the second sliding sleeve is arranged between sliding pawl cover and the supporter of housing, and the downstream part of described the second cylindrical body is inserted in the gap between described housing and supporter and with described elastic component and is contacted,
Wherein, the positioning rib of described the first sliding sleeve can touch with the rotation ribbed joint of described the second sliding sleeve or the inclined-plane that raises with the rotation direction along the second sliding sleeve of the broached-tooth design of described the second sliding sleeve contacts, the rotation rib of described the second sliding sleeve can also engage with the ratchet structure of sliding pawl cover
When in original state, elastic component is in uncompressed state, and the rotation rib of the second sliding sleeve enters in the locating slot of sliding pawl cover and contacts with the end of the positioning rib of the first sliding sleeve, and at this moment the second pressure break hole on the second sliding sleeve deviates from the first pressure break hole on housing;
In order to open fracturing sliding bush assembly, the first sliding sleeve is applied to the active force towards the second sliding sleeve, described positioning rib ejects locating slot by rotation rib, make the second sliding sleeve towards downstream motion and compression elastic piece, cause the second sliding sleeve to rotate, thereby make to rotate rib, engage with the groove of ratchet structure, and positioning rib is aimed at the inclined-plane of broached-tooth design, now align with the second pressure break hole on the second sliding sleeve in the first pressure break hole on housing, thereby set up pressure break passage;
In order to close fracturing sliding bush assembly, the first sliding sleeve is applied to the active force towards the second 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, cause the second sliding sleeve 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, thereby has closed pressure break passage.
2. fracturing sliding bush assembly according to claim 1, it is characterized in that, described in each ratchet be configured to its double wedge from the upstream side locating slot in rotation direction than the downstream locating slot in rotation direction more close to, and each trench of described broached-tooth design equates with the distances of the center line of adjacent two rotation ribs.
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 the second sliding sleeve radially caves in inwards with respect to the circumferential exterior surface of described rotation rib.
4. fracturing sliding bush assembly according to claim 1 and 2, it is characterized in that, described rotation rib extends towards upstream from the end at each protruding peak of broached-tooth design, and the upstream portion of the second cylindrical body of described the second sliding sleeve is configured with the tubular body extending towards upstream vertically that external diameter mates with the internal diameter of the first sliding sleeve.
5. according to the fracturing sliding bush assembly described in any one in the claims, it is characterized in that, described positioning rib, locating slot are identical with the quantity of rotation rib.
6. according to the fracturing sliding bush assembly described in any one in the claims, it is characterized in that, described supporter becomes Split type structure with housing.
7. according to the fracturing sliding bush assembly described in any one in the claims, it 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. according to the fracturing sliding bush assembly described in any one in the claims, it is characterized in that, the end structure tactile with described rotation ribbed joint of described positioning rib becomes the diminishing shape of size.
9. according to the fracturing sliding bush assembly described in any one in the claims, it is characterized in that, described fracturing sliding bush assembly is full-bore.
10. the application at the fracturing device for fracturing stratum according to the fracturing sliding bush assembly described in any one in the claims.
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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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| CN201210244529.9A CN103541709B (en) | 2012-07-13 | 2012-07-13 | Fracturing sliding bush assembly |
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| CN104847325A (en) * | 2015-05-15 | 2015-08-19 | 中国海洋石油总公司 | Infinite-level sectional reconstruction sliding sleeve device triggered by machinery or hydraulic pressure |
| CN105298461A (en) * | 2015-11-03 | 2016-02-03 | 东北石油大学 | Full-bore infinite-time soluble-ball-type fracturing sliding sleeve |
| CN105484718A (en) * | 2014-09-26 | 2016-04-13 | 中国石油化工股份有限公司 | Sliding sleeve assembly and fracturing string |
| CN106545323A (en) * | 2015-09-18 | 2017-03-29 | 中国石油化工股份有限公司 | For the fracturing device of oil gas tubing string |
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Cited By (10)
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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 |
| CN105484718A (en) * | 2014-09-26 | 2016-04-13 | 中国石油化工股份有限公司 | Sliding sleeve assembly and fracturing string |
| 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 |
| CN104847325A (en) * | 2015-05-15 | 2015-08-19 | 中国海洋石油总公司 | Infinite-level sectional reconstruction sliding sleeve device triggered by machinery or hydraulic pressure |
| 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 |
| CN106545323A (en) * | 2015-09-18 | 2017-03-29 | 中国石油化工股份有限公司 | For the fracturing device of oil gas tubing string |
| 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 |
| CN105298461A (en) * | 2015-11-03 | 2016-02-03 | 东北石油大学 | Full-bore infinite-time soluble-ball-type fracturing sliding sleeve |
| CN105298461B (en) * | 2015-11-03 | 2017-09-26 | 东北石油大学 | The unlimited solvable ball fracturing sliding bush of full-bore |
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| CN103541709B (en) | 2016-01-06 |
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