CN104213893B - Oilfield old well selectivity repeats to transform perforating and fracturing integrated pipe column and method of work thereof - Google Patents
Oilfield old well selectivity repeats to transform perforating and fracturing integrated pipe column and method of work thereof Download PDFInfo
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- CN104213893B CN104213893B CN201310220039.XA CN201310220039A CN104213893B CN 104213893 B CN104213893 B CN 104213893B CN 201310220039 A CN201310220039 A CN 201310220039A CN 104213893 B CN104213893 B CN 104213893B
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Abstract
The invention discloses a kind of oilfield old well selectivity to repeat to transform perforating and fracturing integrated pipe column and method of work thereof, be to design for completing to transform the refracturing of interval and carry out the perforations adding of newly-increased interval and pressure break.This tubing string by oil pipe be sequentially connected with safety give up, packer upper, middle, hydraulic ejector, lower packet, ball seat, ball-and-seat, eye pipe and the plug of controllable type, by the operations such as the perforation of newly-increased interval, the operation packer setting of controllable type and deblocking being completed the transformation of all intervals.This tubing string combines hydraulic jetting fracturing and the advantage of double envelope single deck tape-recorder pressure break, the problem that can effectively solve the transformation of oil gas old well refracturing, tubular column structure and simple to operate, efficiency is high, both can complete to have transformed the refracturing of interval, perforations adding and the fracturing work of newly-increased interval can also be completed, only need one-trip string can complete the institutional operation of perforation and pressure break.
Description
Technical field
The present invention relates to a kind of oilfield old well selectivity repeat to transform perforating and fracturing integrated pipe column and
Its method of work, belongs to oil-gas field fracturing technical field.
Background technology
At present, conventional hydraulic sandblasting pressure break is that the hydraulic sand blasting fracturing string by dragging band underseal is carried out
The multilamellar of construction well or multistage pressure break, it can only ensure the packing to lower floor construction section.For oil
For the old well of gas, newly-designed transformation interval is likely distributed in the middle of the interval transformed, by routine
Tubing string cannot meet packing top and transform the requirement of interval.It is the most right that conventional double envelope single deck tape-recorder pressure breaks need
All construction intervals of construction well carry out perforation, the compacting produced when so easily causing nearly well band pore-forming
Infringement, affects oil well productivity.
Summary of the invention
It is an object of the invention to provide a kind of oilfield old well selectivity to repeat to transform perforating and fracturing one
Body tubing string and method of work thereof, its refracturing that can complete to have transformed interval, also can carry out
The perforations adding of newly-increased interval and pressure break.
The technology contents that oilfield old well selectivity repeats to transform perforating and fracturing integrated pipe column is as follows:
This tubing string oil pipe lower end attachment security is given up, and lower end of giving up safely connects controllable type by oil pipe
Upper packer, upper packer lower end by oil pipe connect controllable type middle packer, middle packer
Lower end connects hydraulic ejector, and hydraulic ejector lower end connects lower packet, and lower packet lower end is even
Receiving seat, ball seat lower end connects ball-and-seat, and ball-and-seat lower end connects eye pipe, eye pipe lower end connecting filament
Stifled.
The method of work that oilfield old well selectivity repeats to transform perforating and fracturing integrated pipe column is as follows:
1, according to repeat transformation needs and the interval of design, under enter this tubing string, hydraulic ejector
The position of alignment the first new interval specking, carries out perforation;
2, repeatedly drag this tubing string, complete all perforating jobs that need to transform interval；
3, after all perforating jobs that need to transform interval complete, tubing string is transferred to initial position,
I.e. safety is given up and is positioned at the straight well section of this well, and upper packer is positioned at this well topmost need to transform interval
Top, middle packer is positioned at this well bottom need to transform the top of interval, hydraulic ejector alignment the
The position of one new interval specking, lower packet is positioned at bottom need to transform the lower section of interval；
4, deliver steel ball from well head, open the sliding sleeve in upper packer, start upper packer and set,
And then steel ball continues to move down, and opens the sliding sleeve in middle packer, and in also starting, packer 4 sets,
Last steel ball falls in ball seat 7；
5, after upper packer, middle packer and lower packet set, this tubing string just constitutes class
Like the structure of double envelope single deck tape-recorder fracturing technology tubing strings, can directly carry out the pressing crack construction of orlop section；
6, after the pressing crack construction until orlop section completes, fracturing unit truck stops pumping, allows three packings
Device unseals；
7, the like, the position of dragging tubing string to the second new interval specking, repeat the above steps,
Complete the transformation of all intervals.
Present invention incorporates hydraulic jetting fracturing and the advantage of double envelope single deck tape-recorder pressure break, can effectively solve oil
The problem of gas old well refracturing transformation.When tubing string is hampered and cannot pull out of hole, in tubing string the top
Safety is given up and is easy to trip out upper end tubing string.Tubular column structure and simple to operate, efficiency is high, both can complete
Transform the refracturing of interval, it is also possible to complete perforations adding and the pressure break of newly-increased interval, only need one time
Tubing string can complete the institutional operation of perforation and pressure break.
Accompanying drawing explanation
Fig. 1 is that oilfield old well selectivity repeats to transform perforating and fracturing integrated pipe column schematic diagram.
Detailed description of the invention
Embodiment:
With reference to Fig. 1, embodiments of the invention are further illustrated:
The oil pipe 1 lower end attachment security of this tubing string gives up 2, and safety gives up 2 lower ends by oil pipe 1
Connecting the upper packer 3 of controllable type, upper packer 3 lower end is connected in controllable type by oil pipe 1
Packer 4, middle packer 4 lower end connects hydraulic ejector 5, and hydraulic ejector 5 lower end connects
Lower packet 6, lower packet 6 lower end connects ball seat 7, and ball seat 7 lower end connects ball-and-seat 8,
Ball-and-seat 8 lower end connects eye pipe 9, and eye pipe 9 lower end connects plug 10.
The method of work of this tubing string is as follows:
As a example by the old well of a bite oilfield horizontal well, there are two sections to transform interval, are now to perforations adding again
With newly-increased transformation interval two sections:
1, according to repeat transformation needs and the interval of design, under enter this tubing string, hydraulic ejector
The position A of 5 alignment the first new interval speckings, carries out perforation;
2, repeatedly drag this tubing string, complete all perforating jobs that need to transform interval；
3, after all perforating jobs that need to transform interval complete, tubing string is transferred to initial position,
I.e. safety is given up the 2 straight well sections being positioned at this well, and upper packer 3 is positioned at this well topmost need to transform layer
The top of section, middle packer 4 is positioned at this well bottom need to transform the top of interval, hydraulic ejector
5 alignment position A, lower packet 6 is positioned at bottom need to transform the lower section of interval；
4, deliver steel ball from well head, open the sliding sleeve in upper packer 3, start upper packer 3
Setting, and then steel ball continues to move down, and opens the sliding sleeve in middle packer 4, insulates in also starting
Device 4 sets, and last steel ball falls in ball seat 7；
5, after upper packer 3, middle packer 4 and lower packet 6 set, this tubing string is with regard to group
Having become the structure being similar to double envelope single deck tape-recorder fracturing technology tubing strings, the pressure break that can directly carry out orlop section is executed
Work；
6, after the pressing crack construction until orlop section completes, fracturing unit truck stops pumping, allows three packings
Device unseals；
7, analogizing with secondary, dragging tubing string, to the position B of the second new interval specking, repeats above-mentioned step
Suddenly, the transformation of all intervals is completed.
Claims (1)
1. an oilfield old well selectivity repeats to transform the work side of perforating and fracturing integrated pipe column
Method, it is characterised in that
Oil pipe (1) the lower end attachment security of described tubing string is given up (2), and (2) lower end of giving up safely leads to
Crossing oil pipe (1) and connect the upper packer (3) of controllable type, oil pipe is passed through in upper packer (3) lower end
(1) connecting the middle packer (4) of controllable type, middle packer (4) lower end connects hydraulic ejector
(5), hydraulic ejector (5) lower end connects lower packet (6), and lower packet (6) lower end is even
Receiving seat (7), ball seat (7) lower end connects ball-and-seat (8), and ball-and-seat (8) lower end connects eye
Pipe (9), eye pipe (9) lower end connects plug (10)；
The step of described method of work is as follows:
1) according to repeat transformation needs and the interval of design, under enter this tubing string, water-jet
The position (A) of device (5) alignment the first new interval specking, carries out perforation；
2) repeatedly drag this tubing string, complete all perforating jobs that need to transform interval；
3) after all perforating jobs that need to transform interval complete, tubing string is transferred to initial position,
I.e. safe give up (2) are positioned at the straight well section of this well, and upper packer (3) is positioned at this well topmost
Need to transform the top of interval, middle packer (4) is positioned at this well bottom need to transform the upper of interval
Side, the position (A) of hydraulic ejector (5) alignment the first new interval specking, lower packet (6)
It is positioned at bottom and need to transform the lower section of interval；
4) deliver steel ball from well head, open the sliding sleeve in upper packer (3), start upper packer
(3) setting, and then steel ball continues to move down, and opens the sliding sleeve in middle packer (4), also
In startup, packer (4) sets, and last steel ball falls in ball seat (7)；
5) after upper packer (3), middle packer (4) and lower packet (6) set, this tubing string
Just constituting the structure of double envelope single deck tape-recorder fracturing technology tubing string, this tubing string can directly be carried out
The pressing crack construction of lower layer section；
6), after the pressing crack construction until orlop section completes, fracturing unit truck stops pumping, allows three envelopes
Unseal every device；
7) the like, dragging tubing string, to the position (B) of the second new interval specking, repeats above-mentioned
Step, completes the transformation of all intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220039.XA CN104213893B (en) | 2013-06-05 | 2013-06-05 | Oilfield old well selectivity repeats to transform perforating and fracturing integrated pipe column and method of work thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310220039.XA CN104213893B (en) | 2013-06-05 | 2013-06-05 | Oilfield old well selectivity repeats to transform perforating and fracturing integrated pipe column and method of work thereof |
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| Publication Number | Publication Date |
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| CN104213893A CN104213893A (en) | 2014-12-17 |
| CN104213893B true CN104213893B (en) | 2016-08-10 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275442B (en) * | 2015-10-29 | 2017-08-25 | 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 old well repeats transformation volume fracturing technique |
| CN107965305B (en) * | 2016-10-20 | 2019-12-24 | 中国石油化工股份有限公司 | Layered repeated fracturing method |
| CN110359893B (en) * | 2018-04-09 | 2021-11-30 | 中国石油天然气股份有限公司 | Mine jet fracturing device and operation method |
| CN112177581B (en) * | 2019-07-02 | 2022-06-03 | 中国石油天然气股份有限公司 | Repeated fracturing method for old well |
| CN110671058A (en) * | 2019-09-10 | 2020-01-10 | 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 | Double-sealing single-clamping process pipe column of old horizontal well and method for realizing large-discharge transformation |
| CN113586017B (en) * | 2021-08-31 | 2023-05-16 | 中国石油天然气股份有限公司 | Integrated pipe column suitable for perforation and sand prevention of volcanic reservoir and use method |
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| CN201144682Y (en) * | 2008-01-16 | 2008-11-05 | 中国石油化工股份有限公司西南油气分公司工程技术研究院 | Multiple fracturing pipe column for petroleum and gas well |
| CN201902202U (en) * | 2010-11-25 | 2011-07-20 | 中国石油化工股份有限公司 | Staged fracturing string of oil-gas horizontal well |
| CN202250014U (en) * | 2011-10-08 | 2012-05-30 | 华鼎鸿基石油工程技术(北京)有限公司 | Dual-packing single-clamping staged fracturing tool |
| CN102691495A (en) * | 2012-05-18 | 2012-09-26 | 中国石油天然气股份有限公司 | High-broken-pressure stratum horizontal well sectional-fracturing method for well cementation and completion of casing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9249652B2 (en) * | 2009-07-20 | 2016-02-02 | Conocophillips Company | Controlled fracture initiation stress packer |
| US8695695B2 (en) * | 2011-04-01 | 2014-04-15 | Halliburton Energy Services, Inc. | Downhole tool with pumpable section |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201144682Y (en) * | 2008-01-16 | 2008-11-05 | 中国石油化工股份有限公司西南油气分公司工程技术研究院 | Multiple fracturing pipe column for petroleum and gas well |
| CN201902202U (en) * | 2010-11-25 | 2011-07-20 | 中国石油化工股份有限公司 | Staged fracturing string of oil-gas horizontal well |
| CN202250014U (en) * | 2011-10-08 | 2012-05-30 | 华鼎鸿基石油工程技术(北京)有限公司 | Dual-packing single-clamping staged fracturing tool |
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| CN104213893A (en) | 2014-12-17 |
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