CN204646153U - Slicing and filling fixed tubular column anti-flushing well device - Google Patents
Slicing and filling fixed tubular column anti-flushing well device Download PDFInfo
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- CN204646153U CN204646153U CN201520173278.9U CN201520173278U CN204646153U CN 204646153 U CN204646153 U CN 204646153U CN 201520173278 U CN201520173278 U CN 201520173278U CN 204646153 U CN204646153 U CN 204646153U
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Abstract
The utility model is slicing and filling fixed tubular column anti-flushing well device, is applied to layering fracturing sand control technique.Anti-flushing well device of the present invention, central tube connects top connection and lower contact up and down respectively, spring is had in central tube overcoat between top connection and lower contact, it is characterized in that, it is outer and between top connection and spring that valve body is enclosed within central tube, top connection, valve body and central tube three form an annular hydraulic chamber jointly, and central tube sidewall establishes circulation port, and circulation port communicates with described annular hydraulic chamber.Owing to employing back washing device, layering fracturing sand control technique can realize fixed tubular column anti-flushing well.
Description
Technical field
The utility model relates to oil exploitation layering fracturing sand control instrument, specifically a kind of slicing and filling fixed tubular column anti-flushing well device.
Background technology
The many thin heavy oil of loose sand have the features such as oil is thick, layer is many, interlayer span is large, non-homogeneity is strong, permeability is lower, and it is large that sand-preventing process implements difficulty, and high-pressure extrusion filling effect is undesirable.The general fracturing sand control technique of current employing, namely multiple oil reservoir be in a pressure system next time fracturing sand control complete, have larger discharge capacity, higher operation pressure and larger treatment radius compared with high-pressure packing sand-control, its oil increasing effect is relatively better.But general enforcement fracturing sand control is large due to interlayer difference, causes interlayer to be transformed uneven, even has substratum to employ, affect fracturing sand control effect; Meanwhile, because oil reservoir span is large, in work progress due to substratum crack, annular plug, easily occur pressure jump phenomenon, can cause the failure of fracturing sand control time serious, construction risk is high.
Chinese patent, applying date 2004.11.03, application number 200410036213.6, patent name " layered pipe column for squeeze packing sand control process " discloses a kind of technology that can realize layering gravel pack, but the construction of this technology terminates rear movable tubing string and carries out anti-flushing well, there is potential safety hazard.
Chinese patent, applying date 2011.02.11, application number 201110038345.2, patent name " single multilayer gravel pack methods and instrument ", another one Chinese patent, applying date 2012.12.12, application number 201210534469.4, patent name " single multilayer gravel pack methods ", be a technology disclosed in above-mentioned two patent applications in fact, have open in detail in other patent document that downhole tool involved in the operating tool string that this technology uses is applied for the applicant of this technology, as, application number 201210534298.5, patent name " a kind of rotary location tool ", application number 201210534344.1, patent name " a kind of lining on gravel pack tools ", application number 201210534400.1, patent name " a kind of sliding sleeve switch instrument ", above documents disclose a kind of sand control technique that can realize a tubing string layering gravel pack, but there is following technical problem in this technology: after filling replaces and terminates, a small amount of proppant can be left in downhole tool, in order to prevent sand card instrument, need to carry out anti-flushing well, as occurred that sand plug also needs anti-flushing well immediately in work progress, the step of this technology anti-flushing well be first on carry service aid reacting cycle well-flushing again, so just may to appear in the process carrying service aid the sand card instrument because of sand setting, thus cause operation failure.
Summary of the invention
For solving the problems of the technologies described above, invented a kind of slicing and filling fixed tubular column anti-flushing well device, this instrument coordinates with other downhole tool in separate stratum fracfturing operation, achieves the operation of fixed tubular column anti-flushing well, effectively prevent sand card tubing string.
The utility model have employed following technical scheme:
Slicing and filling fixed tubular column anti-flushing well device, central tube connects top connection and lower contact up and down respectively, spring is had in central tube overcoat between top connection and lower contact, it is outer and between top connection and spring that valve body is enclosed within central tube, top connection, valve body and central tube three form an annular hydraulic chamber jointly, central tube sidewall establishes circulation port, and circulation port communicates with described annular hydraulic chamber.
Compared with prior art, the beneficial effects of the utility model are,
This back washing device is arranged on layered fracturing pipe string every one-level packer bottom, after each slicing and filling construction during anti-flushing well, do not need movable tubing string, backwash liquid enters the circulation port of back washing device through packer from inner and outer pipes post annular space, under pressure, the descending Compress Spring of valve body, backwash passage is opened, and completes anti-flushing well, achieves in slicing and filling sand control process, fixed tubular column backwash goes out remaining sand in pit shaft, greatly improves reliability and the convenience of construction.
Accompanying drawing explanation
Simply describing the present invention above, next describing the present invention further, in detail with reference to describing the drawing of following specific embodiment of the present invention.These drawings only describe some typical embodiments of this invention, therefore can not think to limit the scope of the invention.In these drawings:
Fig. 1 is the structural representation of slicing and filling fixed tubular column anti-flushing well device preferred embodiment one.
Fig. 2 is the structural representation of slicing and filling fixed tubular column anti-flushing well device preferred embodiment two.
Fig. 3 is the structural representation of separate-layer fracturing sand control string.
Detailed description of the invention
Preferred embodiment one, shown in Figure 1, slicing and filling fixed tubular column anti-flushing well device, central tube about 16 connects top connection 11 and lower contact 17 respectively, between top connection 11 and lower contact 17, have spring 15 in central tube 16 overcoat, valve body 13 is enclosed within that central tube 16 is outer and between top connection 11 and spring 15, top connection 11, valve body 13 and central tube 16 three form an annular hydraulic chamber 30 jointly, central tube 16 sidewall establishes circulation port 12, and circulation port 12 communicates with described annular hydraulic chamber 30.There is an expanding chamber valve body 13 upper end, and its section is L-shaped, and top connection 11 bottom is rectangular, and top connection 11 and the phase-splitting of valve body 13 contact site seal, and top connection 11, valve body 13 form the annular hydraulic chamber 30 that a section is rectangle jointly with central tube 16.Described spring 15 is cylindrically coiled spring.
Preferred embodiment two, shown in Figure 2, slicing and filling fixed tubular column anti-flushing well device, central tube about 26 connects top connection 21 and lower contact 27 respectively, between top connection 21 and lower contact 27, have spring 25 in central tube 26 overcoat, valve body 23 is enclosed within that central tube 26 is outer and between top connection 21 and spring 25, top connection 21, valve body 23 and central tube 26 three form an annular hydraulic chamber 31 jointly, central tube 26 sidewall establishes circulation port 22, and circulation port 22 communicates with described annular hydraulic chamber 31.There is an expanding chamber top connection 21 lower end, and its section is L-shaped, and valve body 23 upper end is cylindrical taper, and top connection 21 and the phase-splitting of valve body 23 contact site seal, and top connection 21, valve body 23 form the annular hydraulic chamber 31 that a section is rectangle jointly with central tube 26.Described spring 25 is disc spring.
For ensureing sealing effectiveness, in the endoporus of valve body 13 or 23, be also provided with sealing ring 14 or 24.
The form of springs of preferred embodiment Fig. 1 and Fig. 2 can be exchanged.
The following describes the application of slicing and filling fixed tubular column anti-flushing well device in layered fracturing pipe string, hereinafter referred to as back washing device.
Thermal production well separate-layer fracturing sand control string, shown in Figure 3, comprise the two-layer tubing string of pipe in sand control outer tube and technique, sand control outer tube is arranged on the oil reservoir well section in sleeve pipe 101, in technique, pipe is arranged in sand control outer tube, pipe in sand control outer tube and technique is linked together by releasing tool 10 in top packer 1 upper end.
Sand control outer tube connects top packer 1, back washing device 2, pressure break sealing tool 3, the outer instrument 4 of frac-pack, pressure break sealing tool 3, one-way sealing instrument 5, screen casing 7, external position device 8, pressure break sealing tool 3, Inter-zonal packing device 9, back washing device 2, pressure break sealing tool 3, frac-pack outer instrument 4, pressure break sealing tool 3, one-way sealing instrument 5, screen casing 7, external position device 8, plug 51 from top to bottom.
Top packer 1 is installed on uppermost perforated interval more than 6 position, and Inter-zonal packing device 9 is installed between two perforated intervals 6.
In technique, pipe connects releasing tool 10, frac packs 52, sliding sleeve switch 53, orientation tool 54 and frac-pack conversion equipment 55 from top to bottom.
For the next perforated interval of pressure break, its well-flushing mode is: flushing fluid enters from oil jacket annular space, enter from top packer 1, descending along the annular space in technique between pipe and sand control outer tube, push the valve body of bottom back washing device open thus open circulation canal, descending from the annular space between sand control outer tube and sleeve pipe, then enter in technique from the passage of instrument frac-pack 4 and manage up, complete anti-flushing well process.
Embodiment as herein described is only exemplary embodiments, but is not limited only to these embodiments, and those skilled in the art can not depart from spirit of the present invention and make amendment under enlightening.A lot of change, combination and amendment may be there is in scheme disclosed herein; and all within the scope of the invention, therefore, protection domain is not limited only to explanation above; but define according to claim, protection domain comprises all equivalents of the target of claim.
Claims (5)
1. slicing and filling fixed tubular column anti-flushing well device, central tube connects top connection and lower contact up and down respectively, spring is had in central tube overcoat between top connection and lower contact, it is characterized in that, it is outer and between top connection and spring that valve body is enclosed within central tube, top connection, valve body and central tube three form an annular hydraulic chamber jointly, and central tube sidewall establishes circulation port, and circulation port communicates with described annular hydraulic chamber.
2. slicing and filling fixed tubular column anti-flushing well device according to claim 1, it is characterized in that, there is an expanding chamber valve body upper end, its section is L-shaped, top connection bottom is rectangular, top connection seals mutually with valve body contact part, and top connection, valve body and central tube form the annular hydraulic chamber that a section is rectangle jointly.
3. slicing and filling fixed tubular column anti-flushing well device according to claim 1, it is characterized in that, there is an expanding chamber top connection lower end, its section is L-shaped, valve body upper end is cylindrical taper, top connection seals mutually with valve body contact part, and top connection, valve body and central tube form the annular hydraulic chamber that a section is rectangle jointly.
4. slicing and filling fixed tubular column anti-flushing well device according to claim 1, it is characterized in that, described spring is cylindrically coiled spring.
5. slicing and filling fixed tubular column anti-flushing well device according to claim 1, it is characterized in that, described spring is disc spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520173278.9U CN204646153U (en) | 2015-03-26 | 2015-03-26 | Slicing and filling fixed tubular column anti-flushing well device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520173278.9U CN204646153U (en) | 2015-03-26 | 2015-03-26 | Slicing and filling fixed tubular column anti-flushing well device |
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| Publication Number | Publication Date |
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| CN204646153U true CN204646153U (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520173278.9U Expired - Fee Related CN204646153U (en) | 2015-03-26 | 2015-03-26 | Slicing and filling fixed tubular column anti-flushing well device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533234A (en) * | 2018-06-13 | 2018-09-14 | 邹佳宸 | Horizontal well fixed tubular column sublevel fill stoping and kit |
| CN110107237A (en) * | 2019-04-23 | 2019-08-09 | 成都众智诚成石油科技有限公司 | A kind of down-hole string by-passing valve and its application method |
-
2015
- 2015-03-26 CN CN201520173278.9U patent/CN204646153U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533234A (en) * | 2018-06-13 | 2018-09-14 | 邹佳宸 | Horizontal well fixed tubular column sublevel fill stoping and kit |
| CN110107237A (en) * | 2019-04-23 | 2019-08-09 | 成都众智诚成石油科技有限公司 | A kind of down-hole string by-passing valve and its application method |
| CN110107237B (en) * | 2019-04-23 | 2021-09-17 | 成都众智诚成石油科技有限公司 | Bypass valve for downhole pipe column and use method thereof |
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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: 20150916 Termination date: 20210326 |