CN104929590A - Underground sealing device - Google Patents
Underground sealing device Download PDFInfo
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- CN104929590A CN104929590A CN201510288399.2A CN201510288399A CN104929590A CN 104929590 A CN104929590 A CN 104929590A CN 201510288399 A CN201510288399 A CN 201510288399A CN 104929590 A CN104929590 A CN 104929590A
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- Prior art keywords
- sliding sleeve
- housing
- sealing device
- pod apertures
- shoulder
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- 238000007789 sealing Methods 0.000 title claims description 52
- 238000012360 testing method Methods 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 25
- 239000003129 oil well Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a downhole seal device, which comprises: the locking mechanism comprises a shell, a sliding sleeve with an inner cavity and a locking mechanism. The shell is provided with a first flow guide hole, a first channel and a second channel, wherein the first channel and the second channel are separated from the first flow guide hole, the first channel is communicated with the first subsystem, and the second channel is respectively communicated with the second subsystem and the first channel. The sliding sleeve is provided with a second flow guide hole communicated with the inner cavity, the sliding sleeve is positioned in the shell and forms a first annular space communicated with the first channel with the shell, the first annular space is isolated from the first flow guide hole and the second flow guide hole, the sliding sleeve can be connected with the shell through shear pins and can slide towards the second end along the first end relative to the shell, and the sliding sleeve is provided with a force application part, so that high-pressure liquid can apply pressure to the sliding sleeve from the first annular space. The locking mechanism is capable of locking the sliding sleeve to the housing when the sliding sleeve is slid along the second end thereof. The downhole seal device is closed by staggering the second flow guide holes of the sliding sleeve and the first flow guide holes of the shell, and layered perforation and oil testing are carried out.
Description
Technical field
The present invention relates to Oil/gas Well Oil Test Technology field, be specifically related to a kind of down-hole sealing device.
Background technology
In a well multilayer formation testing, there is multi-openings interval to need to obtain oil test data, just need to carry out formation testing by layer to each perforation layer.Traditional formation testing by layer mode adopts lower bridging plug or cementing plug to shut trying layer, then successively on return top interval and carry out formation testing, also need brill to fall cement plug during the complete operation of formation testing.Its shortcoming is repeatedly to play lower tubular column, lower bridging plug (or cementing plug), and long construction period, speed slowly, costly, easily pollute oil-gas Layer.
Chinese utility model patent ZL 200920172899.X discloses a kind of underground ball throwing control switch valve, when this underground ball throwing control switch valve is opened by pitching, oil pipe pressurized operation, guiding valve is descending under thrust, guiding valve lower end promotes locking jaw and drives motion arm, motion arm is rotated by the protruding ball valve that promotes, realize closing ball valve, guiding valve continues to come downwards to locking jaw inside, until circulation port is opened.Although the underground ball throwing control switch valve of this utility model can realize laminated distributor under well formation testing, but this switch valve realizes the cut out of switch valve by the cut out of manipulator control ball valve, complicated operation is not easily implemented, and once first circulation port is opened, liquid stream will drain into oil jacket annular space from circulation port, hydraulic pressure be die-offed and cannot continue to drive ball valve to close.
Summary of the invention
In order to overcome the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide a kind of down-hole sealing device, utilizes down-hole of the present invention sealing device can not utilize the closedown of ball valve gauge tap valve, simple to operate, easily implement.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
A kind of down-hole sealing device, it is in layering perforation formation testing tubing string, described layering perforation formation testing tubing string has the first end of close oil well mouth and the second end away from described oil well mouth, and described layering perforation formation testing tubing string comprises: the first subsystem, down-hole sealing device and the second subsystem that connect in turn to the second end from first end; Described first subsystem is connected by the first pipeline with described down-hole sealing device, and described second subsystem is connected by the second pipeline with described down-hole sealing device;
Described down-hole sealing device comprises:
Housing, it offers the first pod apertures, and with described first pod apertures isolated first passage and second channel, described first passage is communicated with described first subsystem, and described second channel is communicated with described first passage with described second subsystem respectively;
There is the sliding sleeve of inner chamber, described sliding sleeve offers the second pod apertures with described intracavity inter-connection, described sliding sleeve is positioned at described housing and forms with described housing the first annular space be communicated with described first passage, described first annular space and described first pod apertures and described second pod apertures isolated, described sliding sleeve is connected with described housing by shear pin, and can slide along first end to the second end by relatively described housing, described sliding sleeve has a force section, thus high pressure liquid can be exerted pressure to described sliding sleeve from described first annular space;
Locking mechanism, described locking mechanism can when described sliding sleeve slides along its second end by described sliding sleeve locking on the housing;
This sliding sleeve has at least two operating positions, and when described sliding sleeve is positioned at the first operating position, cuts off and be connected with described housing described in described sliding sleeve passes through, described first pod apertures is connected with described second pod apertures; When described sliding sleeve is positioned at the second operating position, described in cut off fracture, described first pod apertures and described second pod apertures are staggered.
Preferably, described housing comprises the first housing of being positioned at first end and is positioned at the second end and the second housing be fixedly connected with described first housing; Described first pod apertures is positioned on described first housing, described first passage and described second channel are positioned on described second housing, described first ring room, between described sliding sleeve and described second housing, described second housing has the closure part of the first annular space second end described in energy shutoff.
Preferably, described locking mechanism comprises and is fixedly connected on described sliding sleeve first end and has flexible locking jaw, and the first groove being positioned at described first case inside matched with described locking jaw; When described sliding sleeve is positioned at described first operating position, described locking jaw and described first housing abut against, and when described sliding sleeve is positioned at described second operating position, described locking jaw is connected in the first groove of described first housing.
Preferably, described locking mechanism comprises and is fixedly connected on described sliding sleeve second end and has flexible locking jaw, and the second groove being positioned at described second case inside matched with described locking jaw; When described sliding sleeve is positioned at described first operating position, described locking jaw and described second housing abut against, and when described sliding sleeve is positioned at described second operating position, described locking jaw is connected in the second groove of described second housing.
Preferably, the outer wall of described sliding sleeve is provided with the first shoulder, the inwall of described second housing is provided with the second shoulder matched with described first shoulder, when described sliding sleeve slides to described second end, described first shoulder and described second shoulder close gradually, until described first shoulder abuts mutually with described second shoulder.
Preferably, described first shoulder place is provided with the beam for cushioning, and described beam can abut against with described second shoulder.
Preferably, distance required when described locking mechanism is sealed is not more than the axial distance between described first shoulder and described second shoulder.
Preferably, outside sliding sleeve described in the first end of described first pod apertures and between described first housing, at least one seal is provided with.
Preferably, outside sliding sleeve described in the second end of described first pod apertures and between described first housing, at least one seal is provided with.
Preferably, at least one seal is provided with between the second end of described sliding sleeve and described second housing.
Advantage of the present invention is: the mode utilizing the first pod apertures of the second pod apertures on sliding sleeve and housing to be staggered realizes the closedown of this down-hole sealing device, and then oil reservoir is produced in isolation, carries out layering perforation and formation testing.Compared with prior art, the present invention can not because of circulation port first open hydraulic pressure is die-offed and cannot continue drive ball valve close.The present invention has simple, easy to operate, the safe and reliable feature of structure.
Accompanying drawing explanation
Accompanying drawing described here only for task of explanation, and is not intended to limit scope disclosed by the invention by any way.In addition, the shape of each parts in figure and proportional sizes etc. are only schematic, for helping the understanding of the present invention, are not the shape and the proportional sizes that specifically limit each parts of the present invention.Those skilled in the art under the teachings of the present invention, can select various possible shape and proportional sizes to implement the present invention as the case may be.
Fig. 1 is the structural representation of layering perforation formation testing tubing string of the present invention;
Fig. 2 is the structural representation of down-hole of the present invention sealing device first embodiment;
Fig. 3 is the structural representation of down-hole of the present invention sealing device second embodiment.
Detailed description of the invention
By reference to the accompanying drawings with the description of the specific embodiment of the invention, can clearly understand details of the present invention.But the specific embodiment of the present invention described here, only for explaining object of the present invention, and can not to be understood as by any way be limitation of the present invention.Under the teachings of the present invention, technician can conceive based on distortion possible arbitrarily of the present invention, and these all should be regarded as belonging to scope of the present invention.
As Figure 1-3, the invention provides a kind of down-hole sealing device 1, it is in layering perforation formation testing tubing string 2, layering perforation formation testing tubing string 2 has the first end of close oil well mouth and the second end away from oil well mouth, and layering perforation formation testing tubing string 2 comprises: the first subsystem 21, down-hole sealing device 1 and the second subsystem 22 that connect in turn to the second end from first end; First subsystem 21 is connected by the first pipeline 23 with down-hole sealing device 1, and the second subsystem 22 is connected by the second pipeline 24 with down-hole sealing device 1.
Refer to accompanying drawing 2 and accompanying drawing 3, down-hole sealing device 1 comprises: have the sliding sleeve 11 of inner chamber 110, housing and locking mechanism 14.Housing offers the first pod apertures 121, housing offers the first passage 132 isolated with described first pod apertures 121 and second channel 133, described first passage 132 is communicated with described first subsystem 21, and described second channel 133 is communicated with described first passage 132 with described second subsystem 22 respectively.Sliding sleeve 11 offers the second pod apertures 113 be connected with described inner chamber 110, described sliding sleeve 11 is positioned at described housing and forms with described housing the first annular space 15 be communicated with described first passage 132, described first annular space 15 and described first pod apertures 121 and described second pod apertures 113 isolated, described sliding sleeve 11 is connected with described housing by shear pin 10, and can slide along first end to the second end by relatively described housing, described sliding sleeve 11 has a force section, thus high pressure liquid can be exerted pressure to described sliding sleeve 11 from described first annular space 15.Described sliding sleeve 11 can lock on the housing when described sliding sleeve 11 slides along its second end by locking mechanism 14.
Sliding sleeve 11 has at least two operating positions, and when sliding sleeve 11 is positioned at the first operating position, sliding sleeve 11 is connected with housing by cutting off 10, and the first pod apertures 121 is connected with the second pod apertures 113; When sliding sleeve 11 is positioned at the second operating position, cuts off 10 and cut off, sliding sleeve 11 slides to the second end, and the first pod apertures 121 and the second pod apertures 113 are staggered.
Particularly, housing comprises the first housing 12 of being positioned at first end and is positioned at the second end and the second housing 13 be fixedly connected with described first housing 12; Described first pod apertures 121 is positioned on described first housing 12, described first passage 132 and described second channel 133 are positioned on described second housing 13, described first annular space 15, between described sliding sleeve 11 and described second housing 13, described second housing 13 has the closure part 131 of the first annular space 15 second end described in energy shutoff.
The sliding sleeve 11 of this down-hole sealing device 1 has inner chamber 110, and the second pod apertures 113 on sliding sleeve 11 is connected with inner chamber 110.Force section on sliding sleeve 11 outer wall is specially one with the 3rd shoulder 111 of step surface 112, and high pressure liquid can act on the 3rd shoulder 111 place by the first annular space 15 between the second housing 13 and sliding sleeve 11.
The first end that first housing 12 is set in sliding sleeve 11 cuts off 10 with sliding sleeve 11 by one and is connected, the first housing 12 has the first pod apertures 121.First pod apertures 121 is connected with the second pod apertures 113 on sliding sleeve 11 when original state, when cut off under the pressure effect of sliding sleeve 11 in high pressure liquid cut off 10 slide to its second end time, the first pod apertures 121 on first housing 12 staggers with the second pod apertures 113 on sliding sleeve 11, realizes the closedown of this down-hole sealing device 1.
Second housing 13 is set in outside the second end of sliding sleeve 11, and it is threaded fixing with the first housing 12.Form the first annular space 15 between second housing 13 and sliding sleeve 11, described first annular space 15 is connected with the 3rd shoulder 111 with step surface 112 on sliding sleeve 11 outer wall, and the closure part 131 of the second housing 13 has blocked the second end of the first annular space 15.The first passage 132 be connected with the first pipeline 23 is connected with the first annular space 15, and the second channel 133 being communicated with the second pipeline 24 is connected with first passage 132.
Locking mechanism 14 locks sliding sleeve 11 when sliding sleeve 11 is positioned at the second operating position, and the first pod apertures 121 and the second pod apertures 113 are staggered, and anti-anti-skid sheath 11 is returned to the first operating position.
The concrete using method of this down-hole sealing device 1 is as follows: first time light a fire perforation, test after, need down-hole sealing device 1 to close to isolate producing oil reservoir.First in oil jacket annular space, high pressure liquid is injected, high pressure liquid will flow through the first passage 132 of down-hole sealing device 1 along the first pipeline 23, after first time perforation completes, second point duration and degree of heating 226 can block the second channel 133 of down-hole sealing device 1 indirectly, this makes high pressure liquid be entered by first passage 132 to be attached thereto in the first logical annular space 15, hydraulic action in the force section of sliding sleeve 11, namely with the 3rd shoulder 111 place at step surface 112 place.When the pressure of high pressure liquid constantly increases, cutting off of fixing sliding sleeve 11 10 can be cut off by pressure, sliding sleeve 11 just can depart from the constraint of housing, slides under the effect of the pressure to its second end, and the second pod apertures 113 on sliding sleeve 11 staggers mutually with the first pod apertures 121 on housing.Along with the slip of sliding sleeve 11, locking mechanism 14 can lock sliding sleeve 11, and anti-anti-skid sheath 11 is returned to original state.Now down-hole sealing device 1 is closed.
As shown in Figure 1, this down-hole sealing device 1 is in layering perforation formation testing tubing string 2, and this layering perforation formation testing tubing string 2 connects the first subsystem 21, down-hole sealing device 1 and the second subsystem 22 from first end in turn to the second end.This first subsystem 21 comprises the oil pipe 211, the dark pipe nipple 212 in school for fathoming, circulating valve 213, testing valve 214, first manometer 215, first pressure-transmitting joint 216, first packer 217, first screen casing 218, sand sediment pipe 219, control valve wire terminal 210, first igniter head 2101, first perforating gun 2102, first pressure relief device 2103 that connect in turn.First pipeline 23 comprises the first take-off line 231 being arranged in the first pressure-transmitting joint 216, first packer 217, first screen casing 218, sand sediment pipe 219 and control valve wire terminal 210 successively, and is located in oil jacket annular space the second take-off line 232 being communicated with control valve wire terminal 210 and the first passage 132 of down-hole sealing device 1.The first end of the first take-off line 231 is connected with oil jacket annular space, second end of the first take-off line 231 is connected with control valve wire terminal 210, the first end of the second take-off line 232 is connected with the first take-off line 231 by control valve wire terminal 210, and the second end of the second take-off line 232 is connected with the first passage 132 of down-hole sealing device 1.
Second subsystem 22 comprises the second manometer 221, second pressure-transmitting joint 222, second packer 223, second screen casing 224, damper 225, second point duration and degree of heating 226, second perforating gun 227 and the second pressure relief device 228 that connect successively from front to back.Second pipeline 24 comprises the Three branched pipe line 241 being located at connected well Sub-sealing Course device 1 second channel 133 and the second pressure-transmitting joint 222 in oil jacket annular space, and is arranged in the 4th take-off line 242 of the second pressure-transmitting joint 222, second packer 223, second screen casing 224, damper 225, second point duration and degree of heating 226 successively.The first end of Three branched pipe line 241 is connected with the second channel 133 of down-hole sealing device 1, and its second end is connected with the second pressure-transmitting joint 222.The first end of the 4th take-off line 242 is connected with Three branched pipe line 241 by the second pressure-transmitting joint 222, and its second end is connected with second point duration and degree of heating 226.
The using method of layering perforation formation testing tubing string is as follows: enter in oil well 2 times by layering perforation formation testing tubing string, by dark pipe nipple 212 school, school deeply to determine oil reservoir position.
Open testing valve 214, the high pressure liquid that pressure is P1 is squeezed in oil jacket annular space, to flow into the first pipeline 23 from the front end of the first pressure-transmitting joint 216 to make high pressure liquid, act on second point duration and degree of heating igniting 226, the oil reservoir perforation of second point duration and degree of heating 226 pairs of down-hole sealing device 1 second ends through the first passage 132 of down-hole sealing device 1, second channel 133 to the second pipeline 24.
Formation testing, after perforation, formation fluid flows in the inner chamber 110 of the sliding sleeve 11 of down-hole sealing device 1 along the second screen casing 224 through the second pressure-transmitting joint 222, second manometer 221, in the oil jacket annular space between the second pod apertures 113, first pod apertures 121 to the second packer 223 and the first packer, enter oil pipe 211 (even flowing out well head) through the first screen casing 218, first manometer 215.According to working design requirement, realize multiple switching well by testing valve 214, until complete, the oil reservoir near the second end is tested (not containing the final shut-in of this layer).
Sealing, squeezes into the high pressure liquid that pressure is P2, wherein P2 > P1 in oil jacket annular space, flows into the first pipeline 23 to make high pressure liquid from the front end of the first pressure-transmitting joint 216.After second point duration and degree of heating 226 perforation completes, second point duration and degree of heating 226 is by the second channel 133 of indirect plugged well Sub-sealing Course device 1, therefore high pressure liquid can act on the force section of sliding sleeve 11 along the first annular space 15 be connected with the first pipeline 23, namely the 3rd shoulder 111 at step surface 112 place.When the pressure of high pressure liquid constantly increases, cutting off of fixing sliding sleeve 11 10 can be cut off by pressure, sliding sleeve 11 just can depart from the constraint of the first housing 12, and slide to its second end under the effect of the pressure, the second pod apertures 113 on sliding sleeve 11 and the first pod apertures 121 on the first housing 12 stagger mutually.Along with the slip of sliding sleeve 11, locking mechanism 14 can lock sliding sleeve 11, and anti-anti-skid sheath 11 is returned to original state.Now down-hole sealing device 1 is closed.Close testing valve 214, pressure opening circulating valve 213 carries out well-flushing and/or kill-job, closes circulating valve 213, opens testing valve 214.
In oil jacket annular space, squeeze into the high pressure liquid that pressure is P3, wherein P3 > P2, to make high pressure liquid flow into the first pipeline 23 from the front end of the first pressure-transmitting joint 216, act on first igniter head 2101, to the oil reservoir perforation near first end.
Formation testing, formation fluid flows through the first manometer 215 successively along the first screen casing 218 and enters oil pipe 211 (or flowing out well head), according to working design requirement, realizes multiple switching well by testing valve 214, until meet working design requirement.
Close testing valve 214, pressure opening circulating valve 213, carries out well-flushing and/or kill-job, deblocking, lift pipe string.
In a preferred embodiment, refer to accompanying drawing 3, locking mechanism 14 comprises and is fixedly connected on sliding sleeve 11 first end and has flexible locking jaw 141, and the first groove 122 be positioned at inside the first housing 12 matched with locking jaw 141; When sliding sleeve 11 is positioned at the first operating position, locking jaw 141 and the first housing 12 abut against, and when sliding sleeve 11 is positioned at the second operating position, locking jaw 141 is connected in the first groove 122 of the first housing 12.That is, locking mechanism 14 comprises locking jaw 141 and the first groove 122.Locking jaw 141, owing to being fixed on the first end of sliding sleeve 11, so can slide along with the slip of sliding sleeve 11, and then departs from the constraint of the first housing 12 gradually, is connected to locking in the first groove 122 inside the first housing 12, the slip of restriction sliding sleeve 11.
Another preferred embodiment in, refer to accompanying drawing 2, locking mechanism 14 comprises and is fixedly connected on sliding sleeve 11 second end and has flexible locking jaw 141, and the second groove 134 be positioned at inside the second housing 13 matched with locking jaw 141; When sliding sleeve 11 is positioned at the first operating position, locking jaw 141 and the second housing 13 abut against, and when sliding sleeve 11 is positioned at the second operating position, locking jaw 141 is connected in the second groove 134 of the second housing 13.In this embodiment, the locking jaw 141 of locking mechanism 14 is fixedly connected on the second end of sliding sleeve 11, when sliding sleeve 11 is slided to its second end by the pressure of high pressure liquid, sliding sleeve 11 will drive locking jaw 141 to slide to the second end together, now locking jaw 141 departs from the constraint of the second housing 13 gradually, is connected to the interior locking of the second groove 134 of the second housing 13.
In addition, the outer wall of sliding sleeve 11 is provided with the first shoulder 114, the inwall of the second housing 13 is provided with the second shoulder 135 matched with the first shoulder 114, when sliding sleeve 11 slides to the second end, first shoulder 114 and the second shoulder 135 close gradually, until the first shoulder 114 and the second shoulder 135 abut against.
Further, the first shoulder 114 place is provided with the beam 115 for cushioning, and beam 115 can abut against with the second shoulder 135.The first shoulder 114 on anti-anti-skid sheath 11 and the second shoulder 135 on the second housing 13 can there is strong collision when contacting with each other in beam 115.
Further, distance required when locking mechanism 14 is sealed is not more than the axial distance between the first shoulder 114 and the second shoulder 135.Specifically, locking jaw 141 is stuck when the first groove 122 or the second groove 134, and the required distance of sliding of sliding sleeve 11 is less than or equal to the axial distance between the first shoulder 114 and the second shoulder 135.Can ensure like this before locking mechanism 14 locks sliding sleeve 11, the first shoulder 114 on sliding sleeve 11 does not touch mutually with the second shoulder 135 on the second housing 13.
Preferably, at the first end of the second pod apertures 113, outside sliding sleeve 11 and between the first housing 12, be provided with at least one seal, natch, also can have two or more seals.Particularly, can be seal 16a and 16b.
Preferably, outside sliding sleeve 11 described in the second end of described second pod apertures 113 and between described first housing 12, at least one seal 16c is provided with.At least one seal 16d is provided with between second end of sliding sleeve 11 and the second housing 13.
In addition, at least one seal 17 is provided with between the outside of sliding sleeve 11 and described second housing 13.Seals all is above preferably sealing ring.
Each embodiment in this manual all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (10)
1. a down-hole sealing device, it is in layering perforation formation testing tubing string, described layering perforation formation testing tubing string has the first end of close oil well mouth and the second end away from described oil well mouth, and described layering perforation formation testing tubing string comprises: the first subsystem, down-hole sealing device and the second subsystem that connect in turn to the second end from first end; Described first subsystem is connected by the first pipeline with described down-hole sealing device, and described second subsystem is connected by the second pipeline with described down-hole sealing device;
It is characterized in that, described down-hole sealing device comprises:
Housing, it offers the first pod apertures, and with described first pod apertures isolated first passage and second channel, described first passage is communicated with described first subsystem, and described second channel is communicated with described first passage with described second subsystem respectively;
There is the sliding sleeve of inner chamber, described sliding sleeve offers the second pod apertures with described intracavity inter-connection, described sliding sleeve is positioned at described housing and forms with described housing the first annular space be communicated with described first passage, described first annular space and described first pod apertures and described second pod apertures isolated, described sliding sleeve is connected with described housing by shear pin, and can slide along first end to the second end by relatively described housing, described sliding sleeve has force section, thus high pressure liquid can be exerted pressure to described sliding sleeve from described first annular space;
Locking mechanism, described locking mechanism can when described sliding sleeve slides along its second end by described sliding sleeve locking on the housing;
This sliding sleeve has at least two operating positions, and when described sliding sleeve is positioned at the first operating position, cuts off and be connected with described housing described in described sliding sleeve passes through, described first pod apertures is connected with described second pod apertures; When described sliding sleeve is positioned at the second operating position, described in cut off fracture, described first pod apertures and described second pod apertures are staggered.
2. down-hole according to claim 1 sealing device, is characterized in that: described housing comprises the first housing of being positioned at first end and is positioned at the second end and the second housing be fixedly connected with described first housing; Described first pod apertures is positioned on described first housing, described first passage and described second channel are positioned on described second housing, described first ring room, between described sliding sleeve and described second housing, described second housing has the closure part of the first annular space second end described in energy shutoff.
3. down-hole according to claim 2 sealing device, is characterized in that: described locking mechanism comprises and is fixedly connected on described sliding sleeve first end and has flexible locking jaw, and the first groove being positioned at described first case inside matched with described locking jaw; When described sliding sleeve is positioned at described first operating position, described locking jaw and described first housing abut against, and when described sliding sleeve is positioned at described second operating position, described locking jaw is connected in the first groove of described first housing.
4. down-hole according to claim 2 sealing device, is characterized in that: described locking mechanism comprises and is fixedly connected on described sliding sleeve second end and has flexible locking jaw, and the second groove being positioned at described second case inside matched with described locking jaw; When described sliding sleeve is positioned at described first operating position, described locking jaw and described second housing abut against, and when described sliding sleeve is positioned at described second operating position, described locking jaw is connected in the second groove of described second housing.
5. down-hole according to claim 1 sealing device, it is characterized in that: the outer wall of described sliding sleeve is provided with the first shoulder, the inwall of described housing is provided with the second shoulder matched with described first shoulder, when described sliding sleeve slides to described second end, described first shoulder and described second shoulder close gradually, until described first shoulder abuts mutually with described second shoulder.
6. down-hole according to claim 5 sealing device, is characterized in that: described first shoulder place is provided with the beam for cushioning, and described beam can abut against with described second shoulder.
7. down-hole according to claim 5 sealing device, is characterized in that: distance required when described locking mechanism is sealed is not more than the axial distance between described first shoulder and described second shoulder.
8. down-hole according to claim 2 sealing device, is characterized in that: outside sliding sleeve described in the first end of described first pod apertures and between described first housing, be provided with at least one seal.
9. down-hole according to claim 2 sealing device, is characterized in that: outside sliding sleeve described in the second end of described first pod apertures and between described first housing, be provided with at least one seal.
10. down-hole according to claim 1 sealing device, is characterized in that: be provided with at least one seal between the second end of described sliding sleeve and described second housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510288399.2A CN104929590B (en) | 2015-05-29 | 2015-05-29 | Underground sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510288399.2A CN104929590B (en) | 2015-05-29 | 2015-05-29 | Underground sealing device |
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| Publication Number | Publication Date |
|---|---|
| CN104929590A true CN104929590A (en) | 2015-09-23 |
| CN104929590B CN104929590B (en) | 2017-09-15 |
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| CN201510288399.2A Active CN104929590B (en) | 2015-05-29 | 2015-05-29 | Underground sealing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443075A (en) * | 2015-12-31 | 2016-03-30 | 东营市福利德石油科技开发有限责任公司 | Opening-and-closing type double-sliding-sleeve assembly for staged fracturing of horizontal well |
| CN105545282A (en) * | 2015-12-10 | 2016-05-04 | 中国石油天然气股份有限公司 | Layered continuous oil testing system and using method thereof |
| CN109653714A (en) * | 2017-10-11 | 2019-04-19 | 中国石油天然气股份有限公司 | Multilayer oil testing tubular column and oil testing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105443075B (en) * | 2015-12-31 | 2018-01-16 | 东营市福利德石油科技开发有限责任公司 | The double sliding sleeve assemblies of switching regulator for staged fracturing of horizontal well |
| CN109653714A (en) * | 2017-10-11 | 2019-04-19 | 中国石油天然气股份有限公司 | Multilayer oil testing tubular column and oil testing method |
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