CN102418492A - Tie-back plug-in sealing device for horizontal well fracturing - Google Patents
Tie-back plug-in sealing device for horizontal well fracturing Download PDFInfo
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- CN102418492A CN102418492A CN2011103402277A CN201110340227A CN102418492A CN 102418492 A CN102418492 A CN 102418492A CN 2011103402277 A CN2011103402277 A CN 2011103402277A CN 201110340227 A CN201110340227 A CN 201110340227A CN 102418492 A CN102418492 A CN 102418492A
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- wall
- core barrel
- inwall
- horizontal well
- sealing
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Abstract
The invention relates to a tie-back plug-in sealing device for horizontal well fracturing, which is mainly used for horizontal well fracturing reconstruction in an oil-gas field development process. The tie-back plug-in sealing device for horizontal well fracturing consists of an upper joint, a connecting cylinder, an upper back cap, a righting block, a spring set, a lower back cap, a core tube, a sliding piston, a sealing rubber cylinder, a press ring, an upper connecting sleeve, a supporting sleeve, a lower connecting sleeve and a guide cone, wherein a spring adjustment type righting mechanism is used for guaranteeing that the tie-back plug-in sealing device realizes smooth tie-back in an inclined shaft section; the sliding piston is used for compressing the sealing rubber cylinder to realize the effect that the higher the pressure in a pipe string is, the better the sealing property is; and in addition, a plurality of connecting sleeves can also be connected to elongate a seal section, so that reliability in sealing for the tie-back device is guaranteed, and the problems of sealing failure and the like in horizontal well sectional fracturing are prevented.
Description
Technical field
The present invention relates to a kind of fractured horizontal well and insert sealing device, be mainly used in the fractured horizontal well reforming technology in the oilfield exploitation procedure, belong to the wellbore operations instrument that the oil gas well development is used with tieback.
Background technology
Present employed tieback assembly mainly is to use to the tieback well cementation of straight well, can not satisfy the needs of fractured horizontal well technology, aspect setting upright; The righting mechanism of present tieback assembly generally adopts fixedly wiper block design, and this kind set upright mode does not have retractility, uses and is limited to; A kind of tieback of model inserts sealing device can only adapt to a kind of sleeve pipe of model wall thickness, and can not satisfy the hole deviation requirement, in addition; At seal aspect, sealing mechanism mainly adopts rubber sealing, in case cushion rubber is hurt by pipe in the tieback insertion process; The device sealing will be lost efficacy, even smooth tieback does not cooperate requirement if sealing mechanism arrives with the tieback tube; Also be difficult to the sealing effectiveness realized, aspect the controllability of former sealing mechanism, owing to adopt rubber sealing; Making a kind of tieback insert sealing can only be used by tieback tube corresponding with it, in case in construction, tieback technology is had other requirement; When the central tube of cushion rubber is laid in replacing, will be difficult in time satisfy on-the-spot fractured horizontal well production demand.
Summary of the invention
The object of the present invention is to provide a kind of fractured horizontal well to insert sealing device with tieback; Use spring adjustable type righting mechanism, guarantee that tieback inserts sealing device and realizes smooth tieback at lower curved section, in addition; When pressing crack construction; Tieback inserts sealing can bear the tubing string inner high voltage, adopts sliding plunger compression seal packing element, and sealing can realize the tubing string internal pressure good more effect of high leakproofness more; Guarantee the reliability of this tieback assembly sealing, prevent in the horizontal well in segments pressure break, to occur problems such as seal failure.Satisfy in the horizontal well in segments pressing crack construction coupling requirement to sealing and pipe tieback tube, adaptation level well pressure break production demand, the tieback constructing operation makes things convenient for, and the sealing mechanism good sealing effect.
The present invention adopts following technical scheme; Be that a kind of fractured horizontal well is inserted sealing device with tieback; By top connection, connecting cylinder, on carry on the back cap, wiper block, groups of springs, lower back cap, core barrel, sliding plunger, cartridge, pressure ring, upper joint sleeve, support set, lower joint sleeve and guiding cone and constitute; The lower ending opening that it is characterized in that top connection is connected with the outer wall thread of connecting cylinder epimere; The outer wall of connecting cylinder hypomere is connected with the inner thread of core barrel upper end; The lower thread of core barrel connects the outer wall on the top of upper joint sleeve, and upper joint sleeve bottom outer wall and lower joint sleeve external wall of upper portion are linked together by the inner thread of support set, and the outside hole enlargement attenuate of the inwall of core barrel lower end forms the thin segment of core barrel lower end; The guiding cone is threaded on the outer wall of lower joint sleeve bottom; The outside hole enlargement attenuate of the inwall at port place of guiding cone forms the thin segment of guiding cone, and the outer wall central authorities of upper and lower adapter sleeve respectively are provided with the stripper loop of a protrusion, and the outside hole enlargement attenuate of inwall that the top of support set, bottom are two sections forms the last thin segment and the following thin segment of support set; The top of the outer wall of core barrel and middle part are provided with the step convexity; Evenly have 2～8 grooves as spring groove along core barrel outer wall circumference between the two step convexities, groups of springs is installed in the spring groove, and wiper block is the strip and block of evagination; Groups of springs is supported on inwall one side of wiper block evagination in spring groove; The upper end of wiper block is pushed down by the lower end inwall that last back of the body cap leans out, and the lower end of wiper block is pushed down by the upper end inwall that the lower back cap leans out, on carry on the back cap thread and be installed on the protruding outer wall of the top stage of core barrel outer wall; The lower back cap thread is installed on the protruding outer wall of the middle bench of core barrel outer wall; Wiper block is fixed by upper and lower back of the body cap, and wiper block is radially spacing by the inwall that upper and lower back of the body cap leans out at the core barrel outer wall, in the inboard gap of the thin segment of upper joint sleeve outer wall and core barrel lower end, in the gap of upper joint sleeve outer wall and the epimere thin segment inwall of support set, in the gap of lower joint sleeve outer wall and the hypomere thin segment inwall of support set and in the thin segment inwall gap of lower joint sleeve outer wall and the guiding cone of guiding cone upper end, all seals the installation sliding plunger; Cartridge is sleeved on a side of each sliding plunger, and the stripper loop one side compression cartridge of on upper and lower adapter sleeve outer wall, protruding through pressure ring.
Fractured horizontal well of the present invention is inserted sealing device with tieback; In top connection lower inner wall and connector external wall of upper portion threaded connection place sealing ring is housed; At connector bottom outer wall and core barrel external wall of upper portion threaded connection place sealing ring is housed, sealing ring all is housed in the contact position of sliding plunger and upper and lower adapter sleeve outer wall contact position and sliding plunger and above-mentioned each thin segment inwall.
Fractured horizontal well of the present invention is inserted sealing device with tieback, and its spring groove is 2～8 rectangular recess that core barrel axially evenly has in the circumference upper edge of core barrel outer wall; Groups of springs is installed in the spring groove, and a groups of springs is made up of 3～10 springs, and a groups of springs supports same wiper block.
Pressure ring of the present invention is ring-like lid shape, and the medial surface of pressure ring compresses cartridge during installation, and the side of the stripper loop that protrudes on the outer back side of pressure ring and the adapter sleeve outer wall offsets.
Top connection of the present invention is connected through connector with core barrel; Last back of the body cap links to each other with core barrel through screw thread respectively with the lower back cap; Go up the effect that back of the body cap and lower back cap play the control wiper block simultaneously; Wiper block makes it be in softened state through spring; Core barrel, adapter sleeve, support set all link to each other through screw thread with the guiding cone, form same section sealing mechanism by same group of sliding plunger, cartridge, pressure ring and sealing ring being in contact with one another on the adapter sleeve outer wall, and the adapter sleeve outer wall is provided with the plurality of sections sealing mechanism.
Fractured horizontal well of the present invention is inserted sealing device with tieback; Can insert the tube length degree according to the tieback sealing and require lengthening seal section length; Guarantee the reliability of seal section, as long as just can realize increasing the more requirement of multistage sealing mechanism through the quantity that increases adapter sleeve and support set.
Operating principle of the present invention; Fractured horizontal well of the present invention is inserted sealing device in being lowered to process with tieback, and the active force through spring props up the wiper block inwall, and wiper block is contacted with casing wall all the time; Guaranteed that tieback of the present invention inserts sealing device and in returning slotting process, is in the smooth tieback that center condition realizes this device; Adopt spring to regulate the design of wiper block simultaneously, can make wiper block contact with casing wall all the time according to the size compression spring of casing inner diameter; The tieback of realizing a kind of model inserts the sleeve pipe that sealing adapts to the various wall thickness of model of the same race, and the tieback that this kind righting mechanism is more suitable for horizontal well and extended reach well inserts use; After the tieback construction finishes, when carrying out pressing crack construction, will bear high pressure in the tubing string; The tubing string internal pressure is transmitted to and makes its compression seal packing element on the sliding plunger; Sealing mechanism is realized sealing, and the sealing effectiveness of high more each section hermetically-sealed construction of tubing string internal pressure is good more, has guaranteed reliability of the present invention.
The present invention is simple in structure, safe and reliable, is applicable to the staged fracturing construction technology of horizontal well.
Description of drawings
Figure is fractured horizontal well of the present invention is inserted sealing device with tieback a structure chart;
Among the figure: top connection 1, connector 2, on carry on the back cap 3, wiper block 4, groups of springs 5, lower back cap 6, core barrel 7, sliding plunger 8, cartridge 9, pressure ring 10, upper joint sleeve 11, sealing ring 12, support set 13, lower joint sleeve 14, guiding cone 15, stripper loop 16.
The specific embodiment
Embodiment one; Below in conjunction with accompanying drawing; Structure of the present invention is further specified; As shown in the figure; Fractured horizontal well of the present invention is inserted sealing device with tieback; By top connection 1, connecting cylinder 2, on carry on the back cap 3, wiper block 4, groups of springs 5, lower back cap 6, core barrel 7, sliding plunger 8, cartridge 9, pressure ring 10, upper joint sleeve 11, support set 13, lower joint sleeve 14 and guiding cone 15 and constitute; The lower ending opening that it is characterized in that top connection 1 is connected with the outer wall thread of connecting cylinder 2 epimeres, and the outer wall of connecting cylinder 2 hypomeres is connected with the inner thread of core barrel 7 upper ends, the be threaded outer wall on top of upper joint sleeve 11 of the lower inner wall of core barrel 7; Upper joint sleeve 11 bottom outer walls and lower joint sleeve 14 external wall of upper portion are linked together by the inner thread of support set 13; The outside hole enlargement attenuate of the inwall of core barrel 7 lower ends forms the thin segment of core barrel 7 lower ends, and guiding cone 15 is threaded on the outer wall of lower joint sleeve 14 bottoms, and the outside hole enlargement attenuate of inwall at the port place of guiding cone 15 forms the thin segment of guiding cone 14; The outer wall central authorities of upper and lower adapter sleeve 11,14 respectively are provided with the stripper loop 16 of a protrusion; The outside hole enlargement attenuate of the inwall that the top of support set 13, bottom are two sections forms the last thin segment and the following thin segment of support set 13, and the top of the outer wall of core barrel 7 and middle part are provided with the step convexity, axially evenly has the spring groove of groove conduct between the two step convexities along core barrel 7 outer wall circumference upper edge core barrels; Groups of springs 5 is installed in the spring groove; Wiper block 4 is the strip and block of evagination, and groups of springs 5 is supported on inwall one side of wiper block 4 evaginations in spring groove, and wiper block 4 is fixed by upper and lower back of the body cap 3,6; The upper end of wiper block 4 is pushed down by the lower end inwall that last back of the body cap 3 leans out; The lower end of wiper block 4 is pushed down by the upper end inwall that lower back cap 6 leans out, on carry on the back cap 3 screw threads and be installed on the protruding outer wall of the top stage of core barrel 7 outer walls, lower back cap 6 screw threads are installed on the protruding outer wall of the middle bench of core barrel 7 outer walls; Wiper block 4 is radially spacing by the inwall that upper and lower back of the body cap 3,6 leans out at core barrel 7 outer walls; In the inboard gap of the thin segment of upper joint sleeve 11 outer walls and core barrel 7 lower ends, in the gap of upper joint sleeve 11 outer walls and the epimere thin segment inwall of support set 13, in the gap of lower joint sleeve 14 outer walls and the hypomere thin segment inwall of support set 13 and in the thin segment inwall gap of lower joint sleeve 14 outer walls and the guiding cone of guiding cone 15 upper ends, all seal installation sliding plunger 8, cartridge 9 is sleeved on a side of each sliding plunger, a side of the stripper loop 16 that pressure ring 10 protrudes on the outer wall of upper and lower adapter sleeve 11,14 and compress cartridge 9.
Above-mentioned fractured horizontal well is inserted sealing device with tieback; In top connection lower inner wall and connector external wall of upper portion threaded connection place sealing ring 12 is housed; At connector bottom outer wall and core barrel external wall of upper portion threaded connection place sealing ring 12 is housed, with the contact position of the thin segment inwall of core barrel 7, support set 13, guiding cone 15 sealing ring 12 is housed all at sliding plunger 8 and upper and lower adapter sleeve 11,14 outer wall contact positions and sliding plunger 8.
Above-mentioned fractured horizontal well is inserted sealing device with tieback, and its spring groove is for core barrel axially evenly has five rectangular recess in the circumference upper edge of core barrel 7 outer walls; A groups of springs 5 is made up of four springs, and a groups of springs supports same wiper block.
Above-mentioned fractured horizontal well is inserted sealing device with tieback, and its pressure ring 10 is ring-like lid shape, and the medial surface of pressure ring 10 compresses cartridge 9 during installation, and the side of the stripper loop 16 that protrudes on the outer back side of pressure ring 10 and the adapter sleeve outer wall offsets.
Embodiment two; This fractured horizontal well is inserted sealing device with tieback, has only the adapter sleeve of connection in core barrel 7 bottoms, does not need support set in the device overall structure; Guiding cone upper end directly is connected the bottom of adapter sleeve; So only be with an adapter sleeve, two cover sealing mechanisms can only be installed on its adapter sleeve outer wall, sealing effectiveness is relatively poor.Be only applicable to the less demanding operation of pressure.
Embodiment three; This fractured horizontal well is inserted sealing device with tieback, connects three adapter sleeve monomers in core barrel 7 bottoms, promptly on the architecture basics of embodiment one; As long as increase a cover support set and a cover adapter sleeve monomer; Add the lower joint sleeve bottom that hangs over embodiment one, the bottom connects the guiding cone again, can constitute with the fractured horizontal well of six sections sealing mechanisms of three adapter sleeves and insert sealing device with tieback.
As a same reason, also can connect more a plurality of adapter sleeves, the lengthening seal section.
The content of foregoing invention and the technology contents of being contained thereof all constitute ingredient of the present invention.The present invention is directed to fractured horizontal well and insert the characteristics of sealing with tieback, spring adjustable type righting mechanism can guarantee that the tieback insertion is sealed in lower curved section and realizes smooth tieback; During pressing crack construction, tieback inserts sealing can bear the tubing string inner high voltage, adopts sliding plunger compression seal packing element sealing mechanism, can realize the tubing string internal pressure good more effect of high leakproofness more, guarantees the reliability of this tieback assembly sealing.
Claims (4)
1. a fractured horizontal well is inserted sealing device with tieback; By top connection (1), connecting cylinder (2), on carry on the back cap (3), wiper block (4), groups of springs (5), lower back cap (6), core barrel (7), sliding plunger (8), cartridge (9), pressure ring (10), upper joint sleeve (11), support set (13), lower joint sleeve (14) and guiding cone (15) and constitute; The lower ending opening that it is characterized in that top connection (1) is connected with the outer wall thread of connecting cylinder (2) epimere; The outer wall of connecting cylinder (2) hypomere is connected with the inner thread of core barrel (7) upper end; The be threaded outer wall on top of upper joint sleeve (11) of the lower inner wall of core barrel (7); Upper joint sleeve (11) bottom outer wall and lower joint sleeve (14) external wall of upper portion are linked together by the inner thread of support set (13); The outside hole enlargement attenuate of the inwall of core barrel (7) lower end forms the thin segment of core barrel (7) lower end; Guiding cone (15) is threaded on the outer wall of lower joint sleeve (14) bottom; The outside hole enlargement attenuate of the inwall at the port place of guiding cone (15) forms the thin segment of guiding cone (14); The outer wall central authorities of upper and lower adapter sleeve (11), (14) respectively are provided with the stripper loop (16) of a protrusion; The outside hole enlargement attenuate of the inwall that the top of support set (13), bottom are two sections forms the last thin segment and the following thin segment of support set (13), and the top and the middle part of the outer wall of core barrel (7) are provided with the step convexity, and core barrel axially evenly has the spring groove of groove conduct along core barrel (7) outer wall circumference upper edge between the two step convexities; Groups of springs (5) is installed in the spring groove; Wiper block (4) is the strip and block of evagination, and groups of springs (5) is supported on inwall one side of wiper block (4) evagination in spring groove, and wiper block (4) is fixing by upper and lower back of the body cap (3,6); The upper end of wiper block (4) is pushed down by the lower end inwall that last back of the body cap (3) leans out; The lower end of wiper block (4) is pushed down by the upper end inwall that lower back cap (6) leans out, on carry on the back cap (3) screw thread and be installed on the protruding outer wall of the top stage of core barrel (7) outer wall, lower back cap (6) screw thread is installed on the protruding outer wall of the middle bench of core barrel (7) outer wall; Wiper block (4) is radially spacing by the inwall that upper and lower back of the body cap (3,6) leans out at core barrel (7) outer wall; In the inboard gap of the thin segment of upper joint sleeve (11) outer wall and core barrel (7) lower end, in the gap of upper joint sleeve (11) outer wall and the epimere thin segment inwall of support set (13), in the gap of lower joint sleeve (14) outer wall and the hypomere thin segment inwall of support set (13) with lower joint sleeve (14) outer wall and guiding cone (15) on the thin segment inwall gap of guiding cone in all seal installation sliding plunger (8), cartridge (9) is sleeved on a side of each sliding plunger (8), a side of the stripper loop (16) that pressure ring (10) protrudes on the outer wall of upper and lower adapter sleeve (11,14) and compress cartridge (9).
2. fractured horizontal well as claimed in claim 1 is inserted sealing device with tieback; It is characterized in that sealing ring (12) being housed in top connection (1) lower inner wall and connector (2) external wall of upper portion threaded connection place; At connector (2) bottom outer wall and core barrel (7) external wall of upper portion threaded connection place sealing ring (12) is housed, with the contact position of the thin segment inwall of core barrel (7), support set (13), guiding cone (15) sealing ring (12) is housed all at sliding plunger (8) and upper and lower adapter sleeve (11,14) outer wall contact position and sliding plunger (8).
3. fractured horizontal well is inserted sealing device with tieback according to claim 1, it is characterized in that described spring groove axially evenly has five rectangular recess for the circumference upper edge core barrel at core barrel (7) outer wall; A groups of springs (5) is made up of four springs, and a groups of springs (5) supports same wiper block.
4. fractured horizontal well is inserted sealing device with tieback according to claim 1; It is characterized in that described pressure ring (10) is ring-like lid shape; The medial surface of pressure ring (10) compresses cartridge (9), and the side of the stripper loop (16) that protrudes on the outer back side of pressure ring (10) and the adapter sleeve outer wall offsets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103402277A CN102418492A (en) | 2011-11-02 | 2011-11-02 | Tie-back plug-in sealing device for horizontal well fracturing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103402277A CN102418492A (en) | 2011-11-02 | 2011-11-02 | Tie-back plug-in sealing device for horizontal well fracturing |
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| CN102418492A true CN102418492A (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103402277A Pending CN102418492A (en) | 2011-11-02 | 2011-11-02 | Tie-back plug-in sealing device for horizontal well fracturing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015912A (en) * | 2012-12-18 | 2013-04-03 | 安东石油技术（集团）有限公司 | Tieback plug |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3036639A (en) * | 1960-05-02 | 1962-05-29 | Baker Oil Tools Inc | Expandible packing apparatus |
| US4745972A (en) * | 1987-06-10 | 1988-05-24 | Hughes Tool Company | Well packer having extrusion preventing rings |
| CN2154904Y (en) * | 1993-04-24 | 1994-02-02 | 新疆石油管理局钻井工艺研究所 | Sleeve connector |
| CN2329761Y (en) * | 1998-01-19 | 1999-07-21 | 胜利石油管理局河口采油厂 | Pumping well flushing packer |
| CN2573664Y (en) * | 2002-07-18 | 2003-09-17 | 栾传振 | External pipe packer |
| CN2869300Y (en) * | 2005-10-18 | 2007-02-14 | 辽河石油勘探局 | Packer for horizontal well side drilling and horizontal well operation |
| CN200949445Y (en) * | 2005-11-24 | 2007-09-19 | 辽河石油勘探局 | Plugging packer for small borehole oil-gas water well |
| CN200949450Y (en) * | 2006-06-28 | 2007-09-19 | 北京万维亿通科技发展有限公司 | Multifunctional oil producing special tool |
| CN101864923A (en) * | 2010-07-02 | 2010-10-20 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Split type anchor suspension packer |
| CN202338317U (en) * | 2011-11-02 | 2012-07-18 | 中国石油集团渤海钻探工程有限公司 | Tie-back inserting and sealing device for fracturing |
-
2011
- 2011-11-02 CN CN2011103402277A patent/CN102418492A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3036639A (en) * | 1960-05-02 | 1962-05-29 | Baker Oil Tools Inc | Expandible packing apparatus |
| US4745972A (en) * | 1987-06-10 | 1988-05-24 | Hughes Tool Company | Well packer having extrusion preventing rings |
| CN2154904Y (en) * | 1993-04-24 | 1994-02-02 | 新疆石油管理局钻井工艺研究所 | Sleeve connector |
| CN2329761Y (en) * | 1998-01-19 | 1999-07-21 | 胜利石油管理局河口采油厂 | Pumping well flushing packer |
| CN2573664Y (en) * | 2002-07-18 | 2003-09-17 | 栾传振 | External pipe packer |
| CN2869300Y (en) * | 2005-10-18 | 2007-02-14 | 辽河石油勘探局 | Packer for horizontal well side drilling and horizontal well operation |
| CN200949445Y (en) * | 2005-11-24 | 2007-09-19 | 辽河石油勘探局 | Plugging packer for small borehole oil-gas water well |
| CN200949450Y (en) * | 2006-06-28 | 2007-09-19 | 北京万维亿通科技发展有限公司 | Multifunctional oil producing special tool |
| CN101864923A (en) * | 2010-07-02 | 2010-10-20 | 中国石油集团川庆钻探工程有限公司井下作业公司 | Split type anchor suspension packer |
| CN202338317U (en) * | 2011-11-02 | 2012-07-18 | 中国石油集团渤海钻探工程有限公司 | Tie-back inserting and sealing device for fracturing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015912A (en) * | 2012-12-18 | 2013-04-03 | 安东石油技术（集团）有限公司 | Tieback plug |
| CN103015912B (en) * | 2012-12-18 | 2016-03-02 | 安东石油技术（集团）有限公司 | Tieback plug |
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Application publication date: 20120418 |