CN201843602U - Staged modified string of open-hole horizontal well - Google Patents
Staged modified string of open-hole horizontal well Download PDFInfo
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- CN201843602U CN201843602U CN2010206052064U CN201020605206U CN201843602U CN 201843602 U CN201843602 U CN 201843602U CN 2010206052064 U CN2010206052064 U CN 2010206052064U CN 201020605206 U CN201020605206 U CN 201020605206U CN 201843602 U CN201843602 U CN 201843602U
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Abstract
A staged modified string of an open-hole horizontal well is applied to separated layer fracturing construction for open-hole horizontal wells in oilfields. A sieve tube is connected to the upper end of a guide screw-plug, a check valve is connected to the upper end of the sieve tube, the upper end of the check valve is connected with a primary ejector, the upper end of the first ejector is connected with a K344 sliding sleeve type packer B, the upper end of the K344 sliding sleeve type packer B is connected with a secondary ejector through an oil pipe, the upper end of the secondary ejector is connected with a K344 sliding sleeve packer A, the upper end of the K344 sliding sleeve type packer A is connected with a tertiary ejector through an oil pipe, and the upper end of the tertiary ejector is connected with an oil pipe which is further connected to a wellhead. The staged modified string of an open-hole horizontal well has the advantages that the string can be modified in staged fracturing manner without being dragged, separated layer fracturing reliability is guaranteed, and sand plug can be released through reverse circulation. In addition, the string has the advantages of simple structure, high safety and the like.
Description
Technical field
The utility model relates to well workover technology field, oil field, and particularly open-hole horizontal well separate stratum fracfturing construction is a kind of down-hole string that a plurality of different gas-bearing formation sections or the big open-hole horizontal well segmentation of interlayer construction parameter difference are transformed that has.
Background technology
At present, main hydro-jet fracturing technology and the packer staged fracturing technology of adopting is transformed in the segmentation of open-hole horizontal well.Chinese patent notification number CN101270277, a kind of self-breaking glue solution body plug horizontal well in segments perforating and fracturing technology is provided, adopt the hydraulic jet perforation fracturing technology to realize the transformation of each target zone, drag tubing string then, realize the shutoff transformed interlayer by liquid gum plug, but because actual formation is comparatively complicated, separate zone stimulation validity is relatively poor, the cost height, the engineering time is long, and plug has the segmentation transformation of polluting and being not suitable for open-hole horizontal well to the stratum.Chinese patent publication number: CN201057037, provide a kind of horizontal well once to go up pressure-raising and split tubing string, connection from bottom to top is a guide head, guide head connects forces deblocking packer, force deblocking packer top to be connected with the oil pipe of 20-100 rice, between this 20-100 rice bran oil pipe, be connected with ball-and-seat, the top of oil pipe connects the anti-flushing well packer, the top of anti-flushing well packer connects hydraulic anchor, the top attachment security joint of hydraulic anchor, what the top of safety joint to well head connected is heavy wall tubing.On the oil pipe between two packers, also be connected with ball-and-seat and sandblaster.But adopt the packer staged fracturing, relatively poor to the effective packing ability of open-hole horizontal well, and need to drag tubing string in the work progress, the construction risk height.
The utility model content
The purpose of this utility model is: provide a kind of open-hole horizontal well segmentation to transform tubing string, with chock pressure difference and the pressurized effect that conventional jetting pressure break ejector forms, in conjunction with the performance characteristics of K344 packer, realize the segmentation transformation of layering position simultaneously.
The technical solution adopted in the utility model is: tubing string is transformed in the open-hole horizontal well segmentation, mainly by oil pipe 1, third level ejector 2, K344 sleeve type packer A3, second level ejector 4, K344 sleeve type packer B5, first order ejector 6, ball-and-seat 7, screen casing 8 and guiding plug 9 are formed, it is characterized in that: the upper end of guiding plug 9 connects screen casing 8, the upper end of screen casing 8 connects ball-and-seat 7, the upper end of ball-and-seat 7 connects first order ejector 6, the upper end of first order ejector 6 connects K344 sleeve type packer B5, the upper end of K344 sleeve type packer B5 connects second level ejector 4 by oil pipe 1, the upper end of second level ejector 4 connects K344 sleeve type packer A3, the upper end of K344 sleeve type packer A3 connects third level ejector 2 by oil pipe 1, the upper end of third level ejector 2 connects oil pipe 1, and oil pipe 1 is connected to well head.
The chock pressure difference that produces during by means of jetting starts K344 sleeve type packer and sets, and has transformed layer position below shutoff; Finish the segmentation transformation of open-hole horizontal well by the method for oil pipe injection.Except that the construction of bottom oil layer section, each oil layer section work progress needs pitching to open corresponding ejector and K344 sleeve type packer, thereby realizes the staged fracturing transformation of oil reservoir.After spraying the transformation end, close a layer open flow discharge opeing, if oil pressure is less than or equal to casing pressure, packer can automatic deblocking.Therefore, in work progress,, can solve by anti-circulation well cleanup if sand plug occurs.
The beneficial effects of the utility model: tubing string is transformed in the segmentation of the utility model open-hole horizontal well, and the multi-stage jet device and the k344 sleeve type packer of respective numbers arranged, and implements the staged fracturing transformation and need not to drag tubing string; Owing to adopted the k344 sleeve type packer that can bear high pressure, guaranteed the reliability of separate stratum fracfturing; If any one deck sand plug in work progress can remove sand plug by anti-circulant solution; Packer is stopping construction or the automatic deblocking of anti-circulation time, and close layer discharge opeing and the later stage that are beneficial to horizontal well produce; Compare simple in structure, security performance advantages of higher that this tubing string has with other open-hole horizontal well separate stratum fracfturing tubing strings.
Description of drawings
Fig. 1 is that the tubular column structure generalized section is transformed in the segmentation of the utility model open-hole horizontal well.
Among the figure, 1. oil pipe, 2. third level ejector, 3.K344 sleeve type packer A, 4. second level ejector, 5.K344 sleeve type packer B, 6. first order ejector, 7. ball-and-seat, 8. screen casing, 9. guiding plug.
The specific embodiment
Embodiment 1: have three oil reservoirs need implement to spray with a bite oil well and transform, the open-hole horizontal well segmentation of using is transformed tubing string and is example, and the utility model is described in further detail.
Consult Fig. 1.Tubing string is transformed in the segmentation of the utility model open-hole horizontal well, tubing string is transformed in the open-hole horizontal well segmentation, mainly is made up of oil pipe 1, third level ejector 2, K344 sleeve type packer A3, second level ejector 4, K344 sleeve type packer B5, first order ejector 6, ball-and-seat 7, screen casing 8 and guiding plug 9.
The upper end of guiding plug 9 connects screen casing 8, the upper end of screen casing 8 connects a ball-and-seat 7, the upper end of ball-and-seat 7 connects a first order ejector 6, the upper end of first order ejector 6 connects a K344 sleeve type packer B5, the upper end of K344 sleeve type packer B5 connects second level ejector 4 by oil pipe 1, the upper end of second level ejector 4 connects K344 sleeve type packer A3, the upper end of K344 sleeve type packer A3 connects third level ejector 2 by oil pipe 1, the upper end of third level ejector 2 connects oil pipe 1, and oil pipe 1 is connected to well head.First order ejector 6 aligned portions oil layer sections; Second level ejector 4 is aimed at the middle part oil layer section; Third level ejector 2 is aimed at the top oil layer section.
K344 sleeve type packer, ejector and ball-and-seat are existing products, and there is sale in market.
The tubing string work progress is transformed in the segmentation of summary open-hole horizontal well.Consult Fig. 1.At first, after a bite oilwell drilling finishes, according to well-log information design pressure break hop count; According to the pressure break hop count, the design tubular column structure comprises the number that needs the ejector sum of series to use K344 sleeve type packer then; Then, connect fracturing string, G.I.H.
Construction beginning at first, is constructed to the bottom oil layer section, and low speed replaces, and improves discharge capacity then, carries out hydraulic jet perforation, closes the annular space gate then rapidly, press off the stratum after, according to design the bottom oil layer section is constructed; After construction finishes to the bottom oil layer section, drop into steel ball from well head, infusion is continued on ground after steel ball arrives two-stage injection device 4, and sliding sleeve moves down, and two-stage injection device 4 is opened; Continue to suppress, steel ball moves down into K344 sleeve type packer B5 and opens inner sliding sleeve, and K344 sleeve type packer B5 startup sets, and shutoff lower floor simultaneously, carries out perforation subsequently and finishes middle part oil layer section construction with oil jacket with the mode of annotating; After oil layer section construction in middle part finishes, drop into a steel ball again from well head, open third level ejector 2 and corresponding K344 sleeve type packer A3, K344 sleeve type packer A3 startup sets, the packing front has been transformed layer position, carries out hydraulic jet perforation then, then closes the annular space gate, press off the stratum, finish top oil layer section construction with the mode of annotating with oil jacket.
If certain a bite well is transformed layer position more than three layers, then repeat preceding step, construction finishes up to all layers position.If sand plug takes place in work progress, stop to add sand immediately, open flow is to be lower than 1m
3The discharge capacity of/min is carried out anti-circulation well cleanup, treat that returning fluid's body does not have sand grains after, gone out pit shaft for preventing the lightweight ball by backwash, drop into the lightweight ball of corresponding progression again from well head, continue construction.
Claims (1)
1. tubing string is transformed in an open-hole horizontal well segmentation, mainly by oil pipe (1), third level ejector (2), K344 sleeve type packer A (3), second level ejector (4), K344 sleeve type packer B (5), first order ejector (6), ball-and-seat (7), screen casing (8) and guiding plug (9) are formed, it is characterized in that: the upper end of guiding plug (9) connects screen casing (8), the upper end of screen casing (8) connects ball-and-seat (7), the upper end of ball-and-seat (7) connects first order ejector (6), the upper end of first order ejector (6) connects K344 sleeve type packer B (5), the upper end of K344 sleeve type packer B (5) connects second level ejector (4) by oil pipe (1), the upper end of second level ejector (4) connects K344 sleeve type packer A (3), the upper end of K344 sleeve type packer A (3) connects third level ejector (2) by oil pipe (1), the upper end of third level ejector (2) connects oil pipe (1), and oil pipe (1) is connected to well head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206052064U CN201843602U (en) | 2010-11-11 | 2010-11-11 | Staged modified string of open-hole horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206052064U CN201843602U (en) | 2010-11-11 | 2010-11-11 | Staged modified string of open-hole horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201843602U true CN201843602U (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206052064U Expired - Lifetime CN201843602U (en) | 2010-11-11 | 2010-11-11 | Staged modified string of open-hole horizontal well |
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| Country | Link |
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| CN (1) | CN201843602U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536186A (en) * | 2012-02-08 | 2012-07-04 | 中国海洋石油总公司 | Method for fracturing composite pipe column through hydraulic jetting in segmented mode |
| CN103266873A (en) * | 2013-02-28 | 2013-08-28 | 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 | Connecting structure of multilevel hydraulic spraying segmentation fracturing tubular column |
| CN104653160A (en) * | 2015-02-08 | 2015-05-27 | 孔涛 | Multilayer fracturing tubular column tool |
-
2010
- 2010-11-11 CN CN2010206052064U patent/CN201843602U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536186A (en) * | 2012-02-08 | 2012-07-04 | 中国海洋石油总公司 | Method for fracturing composite pipe column through hydraulic jetting in segmented mode |
| CN103266873A (en) * | 2013-02-28 | 2013-08-28 | 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 | Connecting structure of multilevel hydraulic spraying segmentation fracturing tubular column |
| CN104653160A (en) * | 2015-02-08 | 2015-05-27 | 孔涛 | Multilayer fracturing tubular column tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110525 |