CN203394491U - Integrated perforating and fracturing tubing string for selective and repetitive reconstruction of old well in oil field - Google Patents
Integrated perforating and fracturing tubing string for selective and repetitive reconstruction of old well in oil field Download PDFInfo
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- CN203394491U CN203394491U CN201320320128.7U CN201320320128U CN203394491U CN 203394491 U CN203394491 U CN 203394491U CN 201320320128 U CN201320320128 U CN 201320320128U CN 203394491 U CN203394491 U CN 203394491U
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- perforating
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Abstract
The utility model discloses an integrated perforating and fracturing tubing string for selective and repetitive reconstruction of old well in an oil field, and the integrated perforating and fracturing tubing string is designed for re-fracturing for a reconstructed well interval and adding holes and fracturing for a newly added well interval. The integrated perforating and fracturing tubing string comprises a safe releasing sub, controllable upper and central packers, a waterpower injector, a lower packer, a ball seat, a check valve, a perforated pipe and a screwed plug, which are sequentially connected through oil pipes. Reconstruction of all well intervals can be completed by perforating the newly-added well intervals and setting and releasing the controllable packers, and other processes. The tubing string combines the advantages of waterpower injection fracturing and double-sealing and single-clamping fracturing, effectively solves the problem of reconstruction of re-fracturing old well in an oil field. The tubing string simple in structure and operation, and high in efficiency, and can carry out re-fracturing work for a reconstructed well interval and supplement perforating and fracturing work for a newly added well interval. Only one tubing string can complete perforating and fracturing work integrally.
Description
Technical field
The utility model relates to a kind of oilfield old well selectively to be repeated to transform perforating and fracturing integrated pipe column, belongs to oil-gas field fracturing technical field.
Background technology
At present, conventional hydraulic sand blasting pressure break is that it can only guarantee the packing to lower floor construction section by dragging with the hydraulic sand blasting fracturing string of underseal construct multilayer or the multistage pressure break of well.For the old well of oil gas, newly-designed transformation interval may be distributed in the middle of the interval of having transformed, and with conventional tubing string, cannot meet the requirement that interval has been transformed on packing top.Conventional two envelope single deck tape-recorder pressure breaks need first to all construction intervals of construction well, carry out perforation, and the easy like this compacting infringement producing while causing nearly well band pore-forming, affects oil well productivity.
Summary of the invention
The purpose of this utility model is to provide a kind of oilfield old well selectively to repeat to transform perforating and fracturing integrated pipe column, and it can complete the refracturing of having transformed interval, also can increase perforations adding and the pressure break of interval newly.
It is as follows that oilfield old well selectively repeats to transform the technology contents of perforating and fracturing integrated pipe column:
This tubing string oil pipe lower end connects safety and gives up, the safety lower end of giving up connects the upper packer of controllable type by oil pipe, upper packer lower end connects the middle packer of controllable type by oil pipe, middle packer lower end connects hydraulic ejector, hydraulic ejector lower end connects lower packet, and lower packet lower end connects ball seat, and ball seat lower end connects ball-and-seat, ball-and-seat lower end connects eye Guan，Yan Guan lower end and connects plug.
The utility model combines the advantage of hydraulic jetting fracturing and two envelope single deck tape-recorder pressure breaks, can effectively solve the problem of the old well refracturing transformation of oil gas.At tubing string, be hampered cannot pull out of hole time, in tubing string safety topmost, give up and be convenient to trip out upper end tubing string.Tubular column structure and simple to operate, efficiency is high, both can complete the refracturing of having transformed interval, also can complete perforations adding and the pressure break of newly-increased interval, only needs one-trip string can complete the institutional operation of perforation and pressure break.
Accompanying drawing explanation
Fig. 1 is that oilfield old well selectively repeats to transform perforating and fracturing integrated pipe column schematic diagram.
The specific embodiment
Embodiment:
With reference to Fig. 1, embodiment of the present utility model is further illustrated:
The course of work of this tubing string is as follows:
The old well of a bite oilfield horizontal well of take is example, has two sections to transform interval, and perforations adding is transformed two sections of intervals with increasing newly again now:
1, according to repeating the needs of transformation and the interval of design, be lowered to this tubing string, hydraulic ejector 5 is aimed at the position A of the first new interval specking, carries out perforation;
2, repeatedly drag this tubing string, complete all perforating jobs that need transformation interval;
3, after all perforating jobs that need transform interval complete, transfer tubing string to initial position, i.e. safety 2 straight well sections that are positioned at this well of giving up, upper packer 3 is positioned at this well need transform the top of interval topmost, middle packer 4 is positioned at the top that this well needs to transform interval bottom, hydraulic ejector 5 aligned position A, lower packet 6 is positioned at the below that needs bottom to transform interval;
4, from well head, deliver steel ball, open the sliding sleeve in upper packer 3, start upper packer 3 and set, and then steel ball continues to move down, and opens the sliding sleeve in middle packer 4, and in also starting, 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 has just formed the structure of similar two 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 of orlop section completes, fracturing unit truck stops pumping, allows three removing seal for packers;
7, analogize in proper order, drag the position B of the new interval specking of tubing string to the second, repeat above-mentioned steps, complete the transformation of all intervals.
Claims (1)
1. oilfield old well selectively repeats to transform a perforating and fracturing integrated pipe column, it is characterized in that:
This tubing string oil pipe (1) lower end connects give up safely (2), safety is given up (2) lower end by the upper packer (3) of oil pipe (1) connection controllable type, upper packer (3) lower end connects the middle packer (4) of controllable type by oil pipe (1), middle packer (4) lower end connects hydraulic ejector (5), hydraulic ejector (5) lower end connects lower packet (6), lower packet (6) lower end connects ball seat (7), ball seat (7) lower end connects ball-and-seat (8), ball-and-seat (8) lower end connects eye pipe (9), eye pipe (9) lower end connects plug (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320320128.7U CN203394491U (en) | 2013-06-05 | 2013-06-05 | Integrated perforating and fracturing tubing string for selective and repetitive reconstruction of old well in oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320320128.7U CN203394491U (en) | 2013-06-05 | 2013-06-05 | Integrated perforating and fracturing tubing string for selective and repetitive reconstruction of old well in oil field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203394491U true CN203394491U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320320128.7U Expired - Fee Related CN203394491U (en) | 2013-06-05 | 2013-06-05 | Integrated perforating and fracturing tubing string for selective and repetitive reconstruction of old well in oil field |
Country Status (1)
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| CN (1) | CN203394491U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196512A (en) * | 2014-08-26 | 2014-12-10 | 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 | Oil well horizontal well oil jacket simultaneous injection type double-sealing single-clamping volume fracturing tubular column and fracturing method thereof |
| CN109505578A (en) * | 2019-01-09 | 2019-03-22 | 中国石油天然气股份有限公司 | The old well of extra-low permeability oil reservoirs realizes the refracturing method of the lateral Tapping Residual Oil in crack |
| CN112177581A (en) * | 2019-07-02 | 2021-01-05 | 中国石油天然气股份有限公司 | Repeated fracturing method for old well |
-
2013
- 2013-06-05 CN CN201320320128.7U patent/CN203394491U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196512A (en) * | 2014-08-26 | 2014-12-10 | 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 | Oil well horizontal well oil jacket simultaneous injection type double-sealing single-clamping volume fracturing tubular column and fracturing method thereof |
| CN104196512B (en) * | 2014-08-26 | 2017-12-26 | 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 | Oil well horizontal well oil jacket is the same as the double envelope single deck tape-recorder volume fracturing tubing strings of note formula and fracturing process |
| CN109505578A (en) * | 2019-01-09 | 2019-03-22 | 中国石油天然气股份有限公司 | The old well of extra-low permeability oil reservoirs realizes the refracturing method of the lateral Tapping Residual Oil in crack |
| CN112177581A (en) * | 2019-07-02 | 2021-01-05 | 中国石油天然气股份有限公司 | Repeated fracturing method for old well |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20210605 |