CN105649599A - Self-adaptable inflow control device for oil well - Google Patents
Self-adaptable inflow control device for oil well Download PDFInfo
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- CN105649599A CN105649599A CN201610142761.XA CN201610142761A CN105649599A CN 105649599 A CN105649599 A CN 105649599A CN 201610142761 A CN201610142761 A CN 201610142761A CN 105649599 A CN105649599 A CN 105649599A
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- Prior art keywords
- base tube
- control device
- self
- inflow control
- oil well
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/32—Preventing gas- or water-coning phenomena, i.e. the formation of a conical column of gas or water around wells
Abstract
The invention discloses a self-adaptable inflow control device for an oil well. The self-adaptable inflow control device comprises an outer base tube and an inner base tube which penetrates the interior of the outer base tube; one end of the outer base tube is open; the other end of the outer base tube is in closed connection with the outer wall of the inner base tube; a through hole is formed in the position, close to the other end of the of the outer base tube, on the side wall of the inner base tube; a plurality of annular clamping plates with gaps in circumferential directions are arranged in annular space between the outer base tube and the inner base tube and between the through hole and the open end of the outer base tube in parallel at intervals; the outer side walls of the annular clamping plates are in sealed connection with the inner wall of the outer base tube; the inner side walls of the annular clamping plates are in sealed connection with the outer wall of the inner base tube; water expansion units which can stretch and retract in the circumferential direction are arranged on the two sides of the circumferential direction of each gap. According to the device, the problems of complicated structure, small application range, easiness in coning failure and the like in the prior art can be solved; the device is simple in structure; coning failure is prevented effectively; the application range is relatively wide.
Description
Technical field
The present invention relates to the device improving Development Response of Oilfield, particularly relate to a kind of self-adapting type inflow control device for oil well.
Background technology
In long horizontal well, due to the impact of " heel end effect " and/or reservoir heterogeneity, the oil well yield in some position to be significantly larger than other positions, thus the uneven production profile produced may cause pit shaft at these position premature water breakthrough/gas. Once bore into, owing to the flowing of other positions is restricted, oil well output will significantly reduce. In order to eliminate this energy imbalance, common method has segmenting perforating and variable density perforation completion, central canal completion etc. But these methods are limited to the ability of regulation and control of inflow profile, it is difficult to ensure that production profile is enough uniform.
The early stage nineties in last century, NorskHydro (Norway's Hydro) company have developed inflow control device (ICDs) at first, and was successfully applied to Troll oil field first in 1998. End 2013, in succession develop different types of inflow control device (ICDs) both at home and abroad, including passive type inflow control device (PICD) and self adaptation inflow control device (AICD). Wherein, passive type inflow control device (PICD), become a mandarin by equilibrium and delay to see water/gas, but, once water/gas bore mutually into, owing to its viscosity is relatively low, oil well will be taken completely, and suppress the flowing of oil phase, cause inflow control device (ICDs) to lose efficacy, reduce oil well output. Existing self adaptation inflow control device (AICD) has balance chip self adaptation inflow control device, and its mobile equilibrium sheet easily breaks down, and can not effective controlling water coning. Also has a kind of EquiFlowTMAICD, runner when it utilizes the equilibrium relation of fluid inertia force and stickiness power to change fluid by device and resistance, but the viscosity scope of application is little, it is necessary to for different reservoir condition specialized designs. Meanwhile, all there is baroque problem in both the above self adaptation inflow control device (AICD).
Thus, the present inventor is by experience and the practice of being engaged in relevant industries for many years, it is proposed to a kind of self-adapting type inflow control device for oil well, to overcome the defect of prior art.
Summary of the invention
It is an object of the invention to provide a kind of self-adapting type inflow control device for oil well, can overcome that the structure existed in prior art is complicated, the scope of application is little, easy bores into problems such as inefficacies, this apparatus structure is simple, effectively prevents from boring into inefficacy, and the scope of application is wider.
The object of the present invention is achieved like this, a kind of self-adapting type inflow control device for oil well, the described self-adapting type inflow control device for oil well includes outer base tube and is arranged in the interior base tube of described outer substrate tube, the one end open of described outer base tube, being connected in closing of the outer wall of the other end of described outer base tube and described interior base tube, the open-work that on the sidewall of described interior base tube, the position of the other end of close described outer base tube is provided with through; In annular space between described outer base tube and described interior base tube, and parallel interval is provided with multiple annular clamp being circumferentially with breach between the opening of described open-work and described outer base tube, the described annular lateral wall of clamp is connected with the inner wall sealing of described outer base tube, the described annular medial wall of clamp is tightly connected with the outer wall of described interior base tube, and the circumferential both sides of described breach are provided with the water-swellable unit that can circumferentially stretch.
In a better embodiment of the present invention, described water-swellable unit is made up of water-swellable material.
In a better embodiment of the present invention, the inwall of described outer base tube, described breach, described interior base tube outer wall constitute fluidic channel, adjacent two described annular clamps, the inwall of described outer base tube, described interior base tube outer wall constitute current stabilization passage, described fluidic channel and described current stabilization passage alternate setting.
In a better embodiment of the present invention, each described fluidic channel is located along the same line.
In a better embodiment of the present invention, after described water-swellable unit expanse, the area of passage of described fluidic channel is contracted to the 0��90% of initial area of passage.
In a better embodiment of the present invention, 5 times of the axial length that axial length is described fluidic channel of described current stabilization passage.
In a better embodiment of the present invention, the material of described annular clamp is rustless steel.
In a better embodiment of the present invention, described water-swellable unit is arranged at the circumferential both sides of the breach of described annular clamp by rubber element.
In a better embodiment of the present invention, the outer wall of described annular clamp is provided with circumferential recess, described circumferential recess be internally provided with inner wall sealing with described outer base tube against sealing joint strip.
In a better embodiment of the present invention, between inwall and the outer wall of described interior base tube of one end of described outer base tube, form fluid annular entry.
From the above mentioned, self-adapting type inflow control device for oil well provided by the invention, based on jet current principle and water-swellable material harmomegathus principle, this device is capable of identify that fluid type and automatically adjusts its flow resistance by device according to fluid properties, interior base tube, annular space between outer base tube is provided with annular clamp, fluidic channel is formed by the narrowed gap on annular clamp, and it is provided with water-swellable unit in the both sides of the narrowed gap of annular clamp, before non-water breakthrough, device convection cell has certain resistance, the impact of heel end effect and reservoir heterogeneity can be offset, after water breakthrough, flow resistance will dramatically increase, the flowing of water exit interval is significantly inhibited, ensure Oil/gas Well long term stable production, this apparatus structure is simple, and cost puts into low, is suitable for liquid scope wide, is conducive to being widely popularized use.
Accompanying drawing explanation
The following drawings is only intended to, in the present invention being schematically illustrated and explaining, not delimit the scope of the invention. Wherein:
Fig. 1: for the isometric cross-sectional schematic of the self-adapting type inflow control device for oil well of the present invention.
Fig. 2: for the cross-sectional schematic of the self-adapting type inflow control device for oil well of the present invention.
Fig. 3: for the A in Fig. 2 to schematic diagram.
Fig. 4: the self-adapting type inflow control device for oil well for the present invention uses view.
In figure: 100, for the self-adapting type inflow control device of oil well; 1, outer base tube; 10, fluid annular entry; 11, end plate; 111, end plate via; 2, interior base tube; 21, open-work; 3, annular clamp; 31, breach; 32, circumferential recess; 33, sealing joint strip; 4, water-swellable unit; 51, fluidic channel; 52, current stabilization passage; 8, horizontal well; 9, oil pipe.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and effect are more clearly understood from, now comparison accompanying drawing illustrates the specific embodiment of the present invention.
As shown in Figure 1 and Figure 2, the self-adapting type inflow control device 100 for oil well of the present invention, including outer base tube 1 be arranged in the interior base tube 2 within outer base tube 1, outer base tube 1 and interior base tube 2 are coaxially disposed, the one end open of outer base tube 1, being connected in closing of the outer wall of the other end of outer base tube 1 and interior base tube 2, the two ends of interior base tube 2 can connected pipes 9, or be connected with the interior base tube of another self-adapting type inflow control device 100 being used for oil well; In the present embodiment, fluid annular entry 10 is formed between inwall and the outer wall of interior base tube 2 of one end of outer base tube 1, the other end of outer base tube 1 is provided with and the outer integrated end plate 11 of base tube 2 body, end plate 11 is provided with and seals the end plate via 111 wearing interior base tube 2; The open-work 21 being provided with through near the position of the other end of outer base tube 1 on the sidewall of interior base tube 2, liquid in horizontal well 8 enters the annular space between outer base tube 1 and interior base tube 2 through fluid annular entry 10, enter interior base tube 2 through open-work 21 after internal, return to ground then through the oil pipe 9 (prior art) being connected with interior base tube 2; In annular space between outer base tube 1 and interior base tube 2, and parallel interval is provided with multiple annular clamp 3 being circumferentially with breach 31 between the opening of open-work 21 and outer base tube 2, and in the present embodiment, the material of annular clamp 3 is rustless steel; The annular lateral wall of clamp 3 is connected with the inner wall sealing of outer base tube 1, the annular medial wall of clamp 3 is tightly connected with the outer wall of interior base tube 2, and the circumferential both sides (i.e. the two ends of annular clamp 3) of breach 31 are provided with the water-swellable unit 4 that can circumferentially stretch.
Further, as shown in Figure 1, Figure 2, Figure 3 shows, the inwall of outer base tube 1, breach 31, interior base tube 2 outer wall constitute fluidic channel 51, adjacent two annular clamps 3, the inwall of outer base tube 1, interior base tube 2 outer wall constitute current stabilization passage 52, fluidic channel 51 and current stabilization passage 52 alternate setting. In the present embodiment, each fluidic channel 51 is located along the same line, and in one embodiment, the axial length of current stabilization passage 52 is 5 times of the axial length of fluidic channel 51 so that liquid can substantially stabilized flow velocity after fluidic channel 51.
Further, after water-swellable unit 4 expanse, the area of passage of fluidic channel 51 is contracted to the 0��90% of initial area of passage. The circumferential width of breach 31 is of a size of the 5%-20% of annular clamp 3 girth, it is ensured that fluidic channel 51 can be formed and be effectively formed liquid jet, and meets the requirement that water-swellable unit 4 expansion reduces the area of passage of fluidic channel 51. When liquid aqueous rate be zero or only small time, liquid enters the annular space between outer base tube 1 and interior base tube 2 through fluid annular entry 10, water-swellable unit 4 does not expand, liquid via after fluidic channel 51 in current stabilization passage 52 jet core quickly disappear, flowing is stable, and flow resistance is less;When liquid aqueous rate increases, liquid enters the annular space between outer base tube 1 and interior base tube 2 through fluid annular entry 10, and water-swellable unit 4 expands, and fluidic channel 51 area reduces, and forms solid jet, and flow resistance is bigger; When liquid aqueous rate reaches the critical moisture content set, liquid enters the annular space between outer base tube 1 and interior base tube 2 through fluid annular entry 10, and water-swellable unit 4 is expanded to the breach 31 of fluidic channel 51 and closes, and flow resistance is infinitely great; After reaching critical moisture content breach 31 closing, if the liquid aqueous rate of reservoir entered declines, water-swellable unit 4 volume slowly reduces, it is possible to make liquid again recover flowing. Water-swellable unit 4 produces expansion in various degree according to the moisture content that liquid is different, moisture content is more high, and the area of passage of fluidic channel 51 is more little, and liquid flowing resistance is more big, aqueous phase so can be effectively suppressed to rapidly enter in interior base tube 2, thus ensureing that Oil/gas Well is steady in a long-term.
Further, as shown in Figure 1, Figure 3, water-swellable unit 4 is made up of water-swellable material, for instance hydro-expansive rubber PZ-250, and in one embodiment, its sectional dimension is 30mm*20mm. Water-swellable unit 4 is arranged at the circumferential both sides of the breach 31 of annular clamp 3 by rubber element (not shown), in one embodiment, the circumferential both sides of the breach 31 of annular clamp 3 are provided with prominent fine needle, and water-swellable unit 4 is fixed by the mode inserted; In another specific embodiment, the circumferential both sides of breach 31 are provided with draw-in groove, and water-swellable unit 4 is by connecting and fixing.
Further, annular clamp 3 and interior base tube 2 are integrally machined molding, and annular clamp 3 can also be sealedly and fixedly connected on the outer wall of interior base tube 2 (such as welding etc.) by other means.
Further, as in figure 2 it is shown, the outer wall of annular clamp 3 is provided with circumferential recess 32, circumferential recess 32 be internally provided with inner wall sealing with outer base tube 1 against sealing joint strip 33 (can also be O-ring seal). Sealing joint strip 33 guarantees the sealing between annular clamp 3 and outer base tube 1, it is to avoid in well, liquid is directly entered interior base tube 2 inside.
As shown in Figure 4, the self-adapting type inflow control device 100 for oil well of the present invention is in use, it is usually multiple concatenation (each interior base tube can mutually be concatenated or be connected by oil pipe) simultaneously to use, horizontal well 8 product fluid enters the annular space between outer base tube 1 and interior base tube 2 through fluid annular entry 10, the different expansions produced in various degree according to liquid aqueous rate of the water-swellable unit 4 at breach 31 place of annular clamp 3, when liquid aqueous rate be zero or only small time, liquid enters the annular space between outer base tube 1 and interior base tube 2 through fluid annular entry 10, water-swellable unit 4 does not expand, liquid via after fluidic channel 51 in current stabilization passage 52 jet core quickly disappear, flowing is stable, flow resistance is less, when liquid aqueous rate increases, liquid enters the annular space between outer base tube 1 and interior base tube 2 through fluid annular entry 10, and water-swellable unit 4 expands, and fluidic channel 51 area reduces, and forms solid jet, and flow resistance is bigger, when liquid aqueous rate reaches the critical moisture content set, liquid enters the annular space between outer base tube 1 and interior base tube 2 through fluid annular entry 10, and water-swellable unit 4 is expanded to the breach 31 of fluidic channel 51 and closes, and flow resistance is infinitely great,After reaching critical moisture content breach 31 closing, if the liquid aqueous rate of reservoir entered declines, water-swellable unit 4 volume slowly reduces, it is possible to make liquid again recover flowing. It is internal that horizontal well 8 product fluid enters interior base tube 2 through open-work 21 after fluidic channel 51 and current stabilization passage 52, returns to ground then through the oil pipe 9 (prior art) being connected with interior base tube 2.
From the above mentioned, self-adapting type inflow control device for oil well provided by the invention, based on jet current principle and water-swellable material harmomegathus principle, this device is capable of identify that fluid type and automatically adjusts its flow resistance by device according to fluid properties, interior base tube, annular space between outer base tube is provided with annular clamp, fluidic channel is formed by the narrowed gap on annular clamp, and it is provided with water-swellable unit in the both sides of the narrowed gap of annular clamp, before non-water breakthrough, device convection cell has certain resistance, the impact of heel end effect and reservoir heterogeneity can be offset, after water breakthrough, flow resistance will dramatically increase, the flowing of water exit interval is significantly inhibited, ensure Oil/gas Well long term stable production, this apparatus structure is simple, and cost puts into low, is suitable for liquid scope wide, is conducive to being widely popularized use.
The foregoing is only the schematic detailed description of the invention of the present invention, be not limited to the scope of the present invention. Any those skilled in the art, equivalent variations done under without departing from the design of the present invention and the premise of principle and amendment, all should belong to the scope of protection of the invention.
Claims (10)
1. the self-adapting type inflow control device for oil well, it is characterized in that: the described self-adapting type inflow control device for oil well includes outer base tube and is arranged in the interior base tube of described outer substrate tube, the one end open of described outer base tube, being connected in closing of the outer wall of the other end of described outer base tube and described interior base tube, the open-work that on the sidewall of described interior base tube, the position of the other end of close described outer base tube is provided with through; In annular space between described outer base tube and described interior base tube, and parallel interval is provided with multiple annular clamp being circumferentially with breach between the opening of described open-work and described outer base tube, the described annular lateral wall of clamp is connected with the inner wall sealing of described outer base tube, the described annular medial wall of clamp is tightly connected with the outer wall of described interior base tube, and the circumferential both sides of described breach are provided with the water-swellable unit that can circumferentially stretch.
2. the self-adapting type inflow control device for oil well as claimed in claim 1, it is characterised in that: described water-swellable unit is made up of water-swellable material.
3. the self-adapting type inflow control device for oil well as claimed in claim 1, it is characterized in that: the inwall of described outer base tube, described breach, described interior base tube outer wall constitute fluidic channel, adjacent two described annular clamps, the inwall of described outer base tube, described interior base tube outer wall constitute current stabilization passage, described fluidic channel and described current stabilization passage alternate setting.
4. the self-adapting type inflow control device for oil well as claimed in claim 3, it is characterised in that: each described fluidic channel is located along the same line.
5. the self-adapting type inflow control device for oil well as claimed in claim 3, it is characterised in that: after described water-swellable unit expanse, the area of passage of described fluidic channel is contracted to the 0��90% of initial area of passage.
6. the self-adapting type inflow control device for oil well as claimed in claim 3, it is characterised in that: 5 times of the axial length that axial length is described fluidic channel of described current stabilization passage.
7. the self-adapting type inflow control device for oil well as claimed in claim 1, it is characterised in that: the material of described annular clamp is rustless steel.
8. the self-adapting type inflow control device for oil well as claimed in claim 1, it is characterised in that: described water-swellable unit is arranged at the circumferential both sides of the breach of described annular clamp by rubber element.
9. the self-adapting type inflow control device for oil well as claimed in claim 1, it is characterised in that: the outer wall of described annular clamp is provided with circumferential recess, described circumferential recess be internally provided with inner wall sealing with described outer base tube against sealing joint strip.
10. the self-adapting type inflow control device for oil well as claimed in claim 1, it is characterised in that: form fluid annular entry between inwall and the outer wall of described interior base tube of one end of described outer base tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610142761.XA CN105649599A (en) | 2016-03-14 | 2016-03-14 | Self-adaptable inflow control device for oil well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610142761.XA CN105649599A (en) | 2016-03-14 | 2016-03-14 | Self-adaptable inflow control device for oil well |
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| CN105649599A true CN105649599A (en) | 2016-06-08 |
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| CN201610142761.XA Pending CN105649599A (en) | 2016-03-14 | 2016-03-14 | Self-adaptable inflow control device for oil well |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106570248A (en) * | 2016-10-26 | 2017-04-19 | 武汉理工大学 | Design method for AICD flow passage parameters |
| CN106939781A (en) * | 2017-04-21 | 2017-07-11 | 西南石油大学 | A kind of self adaptation flow control device for Oil/gas Well |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080283238A1 (en) * | 2007-05-16 | 2008-11-20 | William Mark Richards | Apparatus for autonomously controlling the inflow of production fluids from a subterranean well |
| CN101421486A (en) * | 2006-04-03 | 2009-04-29 | 埃克森美孚上游研究公司 | Wellbore method and apparatus for sand and inflow control during well operations |
| CN101463719A (en) * | 2009-01-21 | 2009-06-24 | 安东石油技术（集团）有限公司 | Flow control device of high-efficiency flow control screen pipe |
| CN101821476A (en) * | 2007-10-12 | 2010-09-01 | 贝克休斯公司 | Flow restriction device |
| CN101915087A (en) * | 2010-08-23 | 2010-12-15 | 中国石油集团西部钻探工程有限公司 | Sieve tube water control device |
| GB2499596A (en) * | 2012-02-21 | 2013-08-28 | Tendeka Bv | Downhole flow control |
| CN103726814A (en) * | 2014-01-07 | 2014-04-16 | 东北石油大学 | Automatic flow adjusting spray pipe type inflow control device |
| CN103806881A (en) * | 2014-02-19 | 2014-05-21 | 东北石油大学 | Branched flow channel type self-adaptation inflow control device |
| CN205591905U (en) * | 2016-03-14 | 2016-09-21 | 中国石油大学(北京) | A self -adaptation formula stream entry control device for oil well |
-
2016
- 2016-03-14 CN CN201610142761.XA patent/CN105649599A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421486A (en) * | 2006-04-03 | 2009-04-29 | 埃克森美孚上游研究公司 | Wellbore method and apparatus for sand and inflow control during well operations |
| US20080283238A1 (en) * | 2007-05-16 | 2008-11-20 | William Mark Richards | Apparatus for autonomously controlling the inflow of production fluids from a subterranean well |
| CN101821476A (en) * | 2007-10-12 | 2010-09-01 | 贝克休斯公司 | Flow restriction device |
| CN101463719A (en) * | 2009-01-21 | 2009-06-24 | 安东石油技术（集团）有限公司 | Flow control device of high-efficiency flow control screen pipe |
| CN101915087A (en) * | 2010-08-23 | 2010-12-15 | 中国石油集团西部钻探工程有限公司 | Sieve tube water control device |
| GB2499596A (en) * | 2012-02-21 | 2013-08-28 | Tendeka Bv | Downhole flow control |
| CN103726814A (en) * | 2014-01-07 | 2014-04-16 | 东北石油大学 | Automatic flow adjusting spray pipe type inflow control device |
| CN103806881A (en) * | 2014-02-19 | 2014-05-21 | 东北石油大学 | Branched flow channel type self-adaptation inflow control device |
| CN205591905U (en) * | 2016-03-14 | 2016-09-21 | 中国石油大学(北京) | A self -adaptation formula stream entry control device for oil well |
Non-Patent Citations (1)
| Title |
|---|
| 曾泉树 等: "混合型流入控制装置改进及性能分析", 《东北石油大学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106570248A (en) * | 2016-10-26 | 2017-04-19 | 武汉理工大学 | Design method for AICD flow passage parameters |
| CN106570248B (en) * | 2016-10-26 | 2019-10-25 | 武汉理工大学 | The design method of AICD runner parameter |
| CN106939781A (en) * | 2017-04-21 | 2017-07-11 | 西南石油大学 | A kind of self adaptation flow control device for Oil/gas Well |
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