CN104213891B - Old well repeats transformation coiled tubing controllable confining process pipe string - Google Patents
Old well repeats transformation coiled tubing controllable confining process pipe string Download PDFInfo
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- CN104213891B CN104213891B CN201310219568.8A CN201310219568A CN104213891B CN 104213891 B CN104213891 B CN 104213891B CN 201310219568 A CN201310219568 A CN 201310219568A CN 104213891 B CN104213891 B CN 104213891B
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- coiled tubing
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Abstract
Transformation coiled tubing controllable confining process pipe string is repeated the invention discloses a kind of old well, is designed to carry out the larger old well layering refracturing rebuilding construction of well control risk.The coiled tubing of this process pipe string be sequentially connected downwards shearing give up, mechanical casing collar locator, controllable confining, injector, lower packet, sleeve base and guiding check valve, in coiled tubing abrasive perforating, annular space liquid outlet channel is unimpeded, can ensure that perforating effect.In pressure break, upper and lower transformation layer can be reliably insulated, it is ensured that fracturing effect.This process pipe string can complete multistage perforation by the way that coiled tubing dragging with pressure is disposable, insulate mode from coiled tubing sand fracturing using double envelope single deck tape-recorders, be sequentially completed layering section transformation, realize perforating and fracturing integration, improve the efficiency of construction of old well refracturing.
Description
Technical field
Transformation coiled tubing controllable confining process pipe string is repeated the present invention relates to a kind of old well, belongs to oil-gas field fracturing
Technical field.
Background technology
Low-permeability oil gas well pressure break completion was produced after a period of time, and fracture condudtiviy is gradually reduced.In order to improve individual well
Production capacity, excavates Oil/gas Well productive potentialities, often to re-start pressure break.It is different from new well pressure break, to many old wells again pressure break
For, after acting original production tubing string, there is well control risk with being bored under conventional oil pipe, need tripping in fracturing reform drilling tool with pressure, because
This, solves using coiled tubing dragging with pressure.In addition, during old well refracturing, because upper strata crack has been opened, institute
To consider upper and lower layer packing simultaneously.
The content of the invention
Transformation coiled tubing controllable confining process pipe string is repeated it is an object of the invention to provide a kind of old well, to enter
The old well layering refracturing transformation of the larger straight well of row well control risk, directional well and horizontal well.
The particular technique content of the present invention is as follows：
The coiled tubing of this process pipe string connects shearing by connector and given up, and shears lower end connection mechanical casing of giving up
Collar locator, mechanical casing collar locator lower end connection controllable confining, controllable confining lower end connection injector, spray
Emitter lower end connects lower packet, lower packet lower end connection sleeve base, sleeve base lower end connection guiding check valve.
This process pipe string is in coiled tubing abrasive perforating, and annular space liquid outlet channel is unimpeded, can ensure that perforating effect.In pressure break
When, it can reliably insulate upper and lower transformation layer, it is ensured that fracturing effect.This process pipe string can be disposable by coiled tubing dragging with pressure
Multistage perforation is completed, mode is insulated from coiled tubing sand fracturing using double envelope single deck tape-recorders, layering section transformation is sequentially completed, realization is penetrated
Hole is fracturing integrated, improves the efficiency of construction of old well refracturing.
Brief description of the drawings
Fig. 1 is that old well repeats transformation coiled tubing controllable confining process pipe string schematic diagram.
Fig. 2 is operating diagram when old well repeats transformation coiled tubing controllable confining process pipe string perforation.
Fig. 3 is that old well repeats transformation coiled tubing controllable confining process pipe string unset state schematic diagram.
Fig. 4 is that the repetition transformation of old well sets view with coiled tubing controllable confining process pipe string.
Embodiment
Embodiment：
Further illustrated referring to figs. 1 to 4 pairs of embodiments of the invention：
The coiled tubing 1 of this process pipe string connects shearing by connector 2 and gives up 3, and shearing 3 lower ends connection of giving up is mechanical
Casing collar locator (CCL) 4, the lower end of mechanical casing collar locator 4 connection controllable confining 5, the connection of the lower end of controllable confining 5
Injector 7, the lower end of injector 7 connection lower packet 8, the lower end of lower packet 8 connection sleeve base 9, the lower end of sleeve base 9 connection is oriented to
Ball-and-seat 10.
The fracturing process of this process pipe string is as follows：
1) rise after flow string, lower coiled tubing leads to Flushing tubular column, complete through wash well operations.
2) this process pipe string of tripping in, is positioned by casing collar locator (CCL) 4, and injector 7 is aligned into first paragraph design improvement
Position, perforating fluid is injected from coiled tubing 1.When perforating fluid is away from nozzle 200m, discharge capacity is improved, first paragraph hydraulic sand blasting is carried out and penetrates
Hole.During perforation, lower packet 8 is in and sets state, and the inlet opening of controllable confining 5 is blocked by sliding sleeve 6, all the time in deblocking shape
State, perforating fluid is returned out from oil jacket annular space.
3) coiled tubing 1 is above carried, the hydraulic jet perforation of remaining interval is completed one by one.
4) lower coiled tubing 1 after perforation is finished, φ 19.05mm are thrown in alignment first paragraph design improvement position from coiled tubing 1
Steel ball.Treat that steel ball falls on sliding sleeve 6, the liquid feeding pressure of coiled tubing 1, the connecting pin between shearing controllable confining 5 and sliding sleeve 6
Nail, sliding sleeve 6 is together dropped down onto on sleeve base 9 with steel ball, and now, controllable confining 5 can normally be set.Liquid, which is crossed, when nozzle produces section
After drift angle, controllable confining 5, all in the state that sets, insulates upper and lower layer with lower packet 8.Then, to the note of coiled tubing 1
Enter fracturing fluid, complete first paragraph pressing crack construction.
5) coiled tubing 1 is above carried, the pressing crack construction of remaining interval is completed one by one.
6) rise and this process pipe string, lower flow string, completion.
Claims (1)
1. a kind of old well repeats transformation coiled tubing controllable confining process pipe string, it is characterised in that：
The coiled tubing (1) of this process pipe string connects shearing by connector (2) and given up (3), shears (3) lower end connection machine of giving up
Tool formula casing collar locator (CCL) (4), mechanical casing collar locator (4) lower end connection controllable confining (5), controllable confining
(5) lower end connection injector (7), injector (7) lower end connection lower packet (8), lower packet (8) lower end connection sleeve base
(9), sleeve base (9) lower end connection guiding check valve (10), wherein, when carrying out abrasive perforating, injector alignment first paragraph design
Position is transformed, perforating fluid is injected from coiled tubing, lower packet is in and sets state, and the inlet opening of controllable confining is sealed by sliding sleeve
Stifled, controllable confining is in unset state all the time, and perforating fluid is returned out from oil jacket annular space；Perforation lower coiled tubing (1) after finishing, it is right
Quasi- first paragraph design improvement position, throws from coiled tubing (1)Steel ball, treat that the steel ball falls in sliding sleeve (6)
On, coiled tubing (1) liquid feeding pressure, the connecting pin that shearing can be between the control packer (5) and sliding sleeve (6), the sliding sleeve (6)
Together dropped down onto on sleeve base (9) with the steel ball, the controllable confining (5) can normally set, crossing liquid when nozzle produces section
After drift angle, controllable confining (5) is in setting state with lower packet (8), can insulate upper and lower layer；Then to continuous
Oil pipe (1) injects fracturing fluid, completes first paragraph pressing crack construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310219568.8A CN104213891B (en) | 2013-06-05 | 2013-06-05 | Old well repeats transformation coiled tubing controllable confining process pipe string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310219568.8A CN104213891B (en) | 2013-06-05 | 2013-06-05 | Old well repeats transformation coiled tubing controllable confining process pipe string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104213891A CN104213891A (en) | 2014-12-17 |
| CN104213891B true CN104213891B (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310219568.8A Active CN104213891B (en) | 2013-06-05 | 2013-06-05 | Old well repeats transformation coiled tubing controllable confining process pipe string |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105986799B (en) * | 2015-02-28 | 2019-02-15 | 中国石油天然气股份有限公司 | Ball seat insulates more cluster perforating and fracturing tubing strings and construction method |
| CN105484721B (en) * | 2016-01-14 | 2018-03-13 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of efficient pressing crack construction process pipe string of horizontal well and pressing crack construction technique |
| CN106939784A (en) * | 2017-01-13 | 2017-07-11 | 上海全泽能源科技有限公司 | The positioning acidizing device of stratified injection well |
| CN109707362B (en) * | 2019-01-24 | 2021-01-01 | 中国石油天然气股份有限公司 | Fixed-point fracturing method for residual oil in longitudinal single sand body of mining and submerging old well reservoir |
| CN109973067B (en) * | 2019-03-04 | 2021-06-01 | 中国石油天然气股份有限公司 | Horizontal well crack plugging wellbore reconstruction repeated fracturing method |
| CN110206505A (en) * | 2019-05-16 | 2019-09-06 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | A kind of set subsidy blocks the old well reform method of coiled tubing drag fracturing |
| CN111648754A (en) * | 2020-05-19 | 2020-09-11 | 中国石油天然气股份有限公司 | Coiled tubing fracturing and downhole throttling production integrated process pipe column and method thereof |
| CN112324416B (en) * | 2020-11-05 | 2022-08-30 | 中国石油天然气股份有限公司 | Multi-packer process pipe column and method for selective and repeated reconstruction of old well |
| CN113107418B (en) * | 2021-03-25 | 2023-05-05 | 中煤科工集团西安研究院有限公司 | Segmented pressure-maintaining grouting device and method for horizontal drilling of water-bearing layer of coal seam floor |
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| CN104213891A (en) | 2014-12-17 |
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