CN102926729A - Pressure-adjustable uniform-dryness layered steam distributing tool - Google Patents
Pressure-adjustable uniform-dryness layered steam distributing tool Download PDFInfo
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- CN102926729A CN102926729A CN2012104688863A CN201210468886A CN102926729A CN 102926729 A CN102926729 A CN 102926729A CN 2012104688863 A CN2012104688863 A CN 2012104688863A CN 201210468886 A CN201210468886 A CN 201210468886A CN 102926729 A CN102926729 A CN 102926729A
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Abstract
The invention discloses a pressure-adjustable uniform-dryness layered steam distributing tool, and relates to pressure adjusting steam distributing tool. The tool solves the problems that during the steam injection process, under change of the pressure, the steam dryness is not distributed uniformly; the pressure cannot be adjusted to allow the designed steam amount to go into the target oil layer, the steam injection effect is bad, and the oil-steam ratio is low. A swirler is mounted at the upper part inner wall of an outer pipe; a distributer comprises a distributer disk, a plurality of pistons and a plurality of springs, wherein the distributor disk is welded on the inner wall of the outer pipe; the upper end of the inner pipe is welded on the distributer disk; the part on the distributor disk corresponding to the inner pipe is defined to be a round area; the part except the round area on the distributer disk is defined to be an annular area; a plurality of reversed circular cone steam distribution holes are uniformly formed in the round area and the annular area; pistons and springs are arranged from top to bottom inside each reversed circular cone steam distribution hole; the upper ends of the springs are welded on the pistons; and the lower ends of the springs are welded on the walls of the reversed circular cone steam distribution holes. The tool can be used for steam injection oil recovery.
Description
Technical field
The present invention relates to a kind of pressure regulation and join stripper tool, be specifically related to the equal mass dryness fraction steam distribution in separate layer of a kind of pressure-adjustable instrument, belong to the oil recovery technique field.
Background technology
Along with industrial expansion, present Chinese crude output can not satisfy the demand of the national economic development, and therefore continuing to develop cost-effectively the viscous crude resource has important strategic importance.China at present in the Liaohe River, the areas such as triumph, huge port, Xinjiang have found the heavy crude reservoir of One's name is legion mainly to adopt the production techniques such as steam injection, steam gravity auxiliary oil drainage, combustion in situ, have greatly improved output.Wherein heat extraction by steam injection becomes one of effective technology of thickened oil recovery, but this technology incipient stage steam soak, steam flooding thermal recovery mode generally adopt the general steam injection of pit shaft, cause steam overlap, the upper strata development degree is high, the situation that lower floor's development degree is low, gas oil ratio is low as a result, and is less economical.
Some researchers adopt the even steam distributing pipe post of layering to adjust steam to distribute up and down, improve steam entry profile, obtained some effects, and applied.But vapour technical deficiency part is evenly joined in this layering: the one, do not consider the up and down difference of formation pressure, and perhaps ignore and inject the levels pressure variation that later stage formation pressure variation causes, cause the actual quantity of steam that enters oil reservoir not enter oil reservoir according to design; The 2nd, do not consider the distribution of steam quality, because there is Gravity Separation in steam, the steam quality that causes entering each layer is different, finally causes each layer development degree effectively not improved, gas oil ratio is still lower.
Summary of the invention
The purpose of this invention is to provide the equal mass dryness fraction steam distribution in separate layer of a kind of pressure-adjustable instrument, realize under the steam injection process pressure changing, realize the steam quality uniform distribution, and can automatically adjust pressure and enter the purpose oil reservoir according to the quantity of steam of design, improve steam injection efficiency to reach, improve the purpose of gas oil ratio.
Technical scheme of the present invention is: the equal thousand degree steam distribution in separate layer instruments of a kind of pressure-adjustable comprise sleeve pipe, outer tube, inner tube, cyclone, distributor, upper packer, lower packet and interior packer, the outside of inner tube is set with outer tube, interior packer is installed between the bottom of inner tube and the outer tube, the outside of outer tube is set with sleeve pipe, upper packer and lower packet are installed between outer tube and the sleeve pipe, distributor is installed on the inwall of outer tube middle part, and the upper end of inner tube is connected with distributor, is distributed with multi-openings on the outer tube; On the upper inside wall of outer tube cyclone is installed, described distributor comprises the distributor disk, a plurality of pistons and a plurality of spring, the distributor disk is welded on the inwall of outer tube, and the upper end of inner tube is welded on the distributor disk, the part of corresponding inner tube is border circular areas on the definition distributor disk, remove the remaining part of border circular areas on the definition distributor disk and be defined as annular region, evenly offer a plurality of inverted round table in border circular areas and the annular region and join steam vent, each inverted round table is joined and is provided with piston and spring in the steam vent from top to bottom, the upper end of spring is welded on the piston, and the lower end of spring is welded on inverted round table and joins on the hole wall of steam vent.
Preferred version: the length of outer tube is 6m, and external diameter is 114.3mm, and internal diameter is 12.3mm, and outer tube adopts steel pipe to make.
Preferred version: evenly be provided with four row perforations along its circumferencial direction on the outer tube, vertical distance in every row perforation between adjacent two perforations is 406mm, perforation quantity in every row perforation is 15, four row perforations are defined as respectively the first row perforation in the direction of the clock, the secondary series perforation, the 3rd row perforation and the 4th row perforation, vertical distance in first row perforation and the secondary series perforation between adjacent two perforations is 203mm, vertical distance in the 3rd row perforation and the 4th row perforation between adjacent two perforations is 203mm, two adjacent in first row perforation and the 3rd row perforation perforations are on same level, and two adjacent in secondary series perforation and the 4th row perforation perforations are on same level.
Preferred version: the perforation diameter is 16mm.
Preferred version: be tilted to lower hole outside in perforation is served as reasons, the angle between axially bored line and the vertical curve is that 30 degree are between 60 degree.
Preferred version: the quantity that the inverted round table in the border circular areas is joined steam vent is four.
Preferred version: the quantity that the inverted round table in the annular region is joined steam vent is six.
The present invention compared with prior art has following effect:
One, the cyclone of installing on the upper inside wall of middle external tube of the present invention can solve the different problems of the steam quality that enters each layer that traditional steam injection string is caused by the steam Gravity Separation when delivering vapor.Steam is by behind the cyclone, utilize water conservancy diversion and the atomizing of cyclone internal construction, outlet becomes uniform vapour-liquid mixed phase flows, and makes by the identical realization steam injection of the dryness of wet steam mass dryness fraction of embedded tubing string inner tube and inner and outer pipes annular space runner evenly, improves recovery ratio;
Two, the distributor among the present invention can solve traditional steam injection string when steam injection because of formation pressure difference up and down and in steam injection process the pressure of oil reservoir change the problems such as the imbalance of up and down oil reservoir steam injection, the development degree that cause differ greatly.Realize the dynamic equilibrium of steam injection amount in the steam injection process by the piston in the distributor and spring structure, improve steam injection efficiency, improve gas oil ratio, improve the utilization rate of steam thermal energy, use manpower and material resources sparingly energy conservation.
Description of drawings
Fig. 1 is the structural representation of the equal mass dryness fraction steam distribution in separate layer of pressure-adjustable instrument;
Fig. 2 is the A place enlarged drawing of Fig. 1;
Fig. 3 is the Flow-rate adjustment flow chart of the equal mass dryness fraction steam distribution in separate layer of pressure-adjustable instrument;
Fig. 4 be distributor join vapour structure distribution figure;
Fig. 5 is 1/4th sectional views of outer tube;
Fig. 6 is the cross-sectional view of outer tube;
Fig. 7 is the C place enlarged drawing of Fig. 6.
The specific embodiment
The specific embodiment one: present embodiment is described in conjunction with Fig. 1 to Fig. 6, the equal mass dryness fraction steam distribution in separate layer of a kind of pressure-adjustable instrument of present embodiment comprises sleeve pipe 1, outer tube 2, inner tube 3, cyclone 4, distributor 5, upper packer 6, lower packet 7 and interior packer 8, the outside of inner tube 3 is set with outer tube 2, interior packer 8 is installed between the bottom of inner tube 3 and the outer tube 2, the outside of outer tube 2 is set with sleeve pipe 1, upper packer 6 and lower packet 7 are installed between outer tube 2 and the sleeve pipe 1, distributor 5 is installed on the outer tube 2 middle part inwalls, and the upper end of inner tube 3 is connected with distributor 5, is distributed with multi-openings on the outer tube 2; Cyclone 4 is installed on the upper inside wall of outer tube 2, described distributor 5 comprises distributor disk 5-1, a plurality of piston 5-2 and a plurality of spring 5-3, distributor disk 5-1 is welded on the inwall of outer tube 2, and the upper end of inner tube 3 is welded on distributor disk 5-1, the part of the upper corresponding inner tube 3 of definition distributor disk 5-1 is border circular areas 9, remove border circular areas 9 remaining parts on the definition distributor disk 5-1 and be defined as annular region 10, border circular areas 9 and annular region 10 be interior evenly to be offered a plurality of inverted round table and joins steam vent 5-4, each inverted round table is joined and is provided with piston 5-2 and spring 5-3 in the steam vent 5-4 from top to bottom, the upper end of spring 5-3 is welded on the piston 5-2, and the lower end of spring 5-3 is welded on inverted round table and joins on the hole wall of steam vent 5-4.
When there are pressure gap in upper strata oil reservoir 11 and lower floor's oil reservoir 12, steam injection amount detuning phenomena can occur in common steam distribution in separate layer tubing string, causes most of steam to enter the oil reservoir that height oozes low pressure, and throttle flow is not distribution according to need.But this steam distribution in separate layer tubing string can effectively adapt to the different situation of each formation pressure, and for example when the upper strata formation pressure was excessive, common steam distribution in separate layer tubing string can cause most of steam injection lower floor and produce the steam injection imbalance.When using this pressure-adjustable constant steam distribution in separate layer tubing string, the pressure reduction that injects the piston two ends of upper strata steam channel reduces, spring deformation diminishes, the active force pushing piston is up, joining the steam vent aperture will increase, to increase by the quantity of steam of joining steam vent, simultaneously when the quantity of steam that injects lower floor is large, the chock pressure difference that injects the piston two ends of lower floor's steam channel will increase, pushing piston moves down, and joins the steam vent aperture and reduces, and reduces the steam injection amount, the common balance steam injection of dual mode amount makes the injection upper strata oil reservoir of steam stable.When lower floor's formation pressure was large, the steam injection amount that can guarantee to inject lower floor's oil reservoir according to same principle was stable.
The specific embodiment two: in conjunction with Fig. 1 present embodiment is described, the length of the outer tube 2 of present embodiment is 6m, and external diameter is 114.3mm, and internal diameter is 12.3mm, and outer tube 2 adopts steel pipe to make.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment three: present embodiment is described in conjunction with Fig. 5 and Fig. 6, evenly be provided with four row perforations along its circumferencial direction on the outer tube 2 of present embodiment, vertical distance L 1 in every row perforation between adjacent two perforations is 406mm, perforation quantity in every row perforation is 15, four row perforations are defined as respectively first row perforation 2-1 in the direction of the clock, secondary series perforation 2-2, the 3rd row perforation 2-3 and the 4th row perforation 2-4, vertical distance L 2 among first row perforation 2-1 and the secondary series perforation 2-2 between adjacent two perforations is 203mm, vertical distance L 2 among the 3rd row perforation 2-3 and the 4th row perforation 2-4 between adjacent two perforations is 203mm, two adjacent among first row perforation 2-1 and the 3rd row perforation 2-3 perforations are on same level, and two adjacent among secondary series perforation 2-2 and the 4th row perforation 2-4 perforations are on same level.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment four: in conjunction with Fig. 5 and Fig. 6 present embodiment is described, the perforation diameter of present embodiment is 16mm.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment five: in conjunction with Fig. 5, Fig. 6 and Fig. 7 present embodiment is described, the perforation of present embodiment serve as reasons in outside be tilted to lower hole, the angle between axially bored line and the vertical curve be 30 the degree to 60 the degree between.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment six: in conjunction with Fig. 3 present embodiment is described, the quantity that the inverted round table in the border circular areas 9 of present embodiment is joined steam vent 5-4 is four.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment seven: in conjunction with Fig. 3 present embodiment is described, the quantity that the inverted round table in the annular region 10 of present embodiment is joined steam vent 5-4 is six.Other composition is identical with the specific embodiment two with annexation.
Embodiment: introduce embodiment as an example of isolated island oil recovery factory GDNB76X43 well example, GDNB76X43 is the steam injection well of two-layer oil reservoir, and according to the basic parameter of oil well and injection boiler, calculating up and down by steam injection oil recovery software, the steam injection amount of oil reservoir is 7t/h and 4t/h.
1, the selection of outer tube: outer pipe range 6m, the steel pipe of employing 114.3 * 12.3mm.
2, determining of outer tube perforation number: in conjunction with layering tubing string levels vapor (steam) velocity and impact force, prevent from destroying oil well casing, consider the structural strength of outer tube itself and to the size of sleeve pipe impact force, offer 60 perforations at outer tube altogether, diameter is 16mm, evenly be provided with four row perforations along its circumferencial direction on the outer tube 2, vertical distance L 1 in every row perforation between adjacent two perforations is 406mm, perforation quantity in every row perforation is 15, four row perforations are defined as respectively first row perforation 2-1 in the direction of the clock, secondary series perforation 2-2, the 3rd row perforation 2-3 and the 4th row perforation 2-4, vertical distance L 2 among first row perforation 2-1 and the secondary series perforation 2-2 between adjacent two perforations is 203mm, vertical distance L 2 among the 3rd row perforation 2-3 and the 4th row perforation 2-4 between adjacent two perforations is 203mm, two adjacent among first row perforation 2-1 and the 3rd row perforation 2-3 perforations are on same level, and two adjacent among secondary series perforation 2-2 and the 4th row perforation 2-4 perforations are on same level.Be tilted to lower hole outside in perforation is served as reasons, the angle between axially bored line and the vertical curve is between 30 degree are spent to 60, to avoid flinging internal surface of sleeve pipe.
3, on the upper inside wall of outer tube 2 cyclone 4 is installed, makes steam quality even, guarantee the safety of outer tube and cyclone.
The number of 4, joining steam vent: what of number determine that by the character of upper strata oil reservoir its computational process is as follows: known lower floor oil reservoir turns all reset pressure P
10=16.27MPa, perforation size A on lower floor's production string
1=5.024 * 10
-5m
2, quantity n=60, the steam injection amount m that lower floor's oil reservoir is required
1=4t/h, the density p=165.3kg/m of steam injection
3, and distributor upper pressure P=16.35MPa.
According to:
m
1＝nA
1v
1tρ
Calculate v
1=2.24m/s, v
1Be outer tube perforation steam flow rate, t is the time, by:
Calculate the pressure P in lower floor's production string
11=16270414Pa in like manner obtains the pressure P in inner and outer pipes annular space zone in conjunction with the perforation situation of outer tube
12=16270828Pa, then P
12+ P
1f(P
1fBe friction loss 74948Pa) obtain on the distributor injecting the pressure P of the piston base of lower floor's oil reservoir
13=16345776Pa.
According to:
Obtain injecting on the distributor the total area of passage A of steam on lower floor's oil reservoir
On=0.158m
2, the area of passage of each piston spring structure is 0.04m in the design
2So injecting lower floor's oil reservoir piston spring structure number on the distributor is 4, can get in conjunction with the inner tube calculation of parameter that to inject upper strata oil reservoir piston spring structure number on the automobile fitting device be 6.Can make the steam quality of injecting oil reservoir even according to the above steam distributing pipe post that manufactures and designs, and can overcome the steam injection imbalance that oil reservoir causes because of pressure variation in pressure gap and the steam injection process.
Claims (7)
1. the equal mass dryness fraction steam distribution in separate layer of pressure-adjustable instrument, the equal mass dryness fraction steam distribution in separate layer of pressure-adjustable instrument comprises sleeve pipe (1), outer tube (2), inner tube (3), cyclone (4), distributor (5), upper packer (6), lower packet (7) and interior packer (8), the outside of inner tube (3) is set with outer tube (2), between the bottom of inner tube (3) and the outer tube (2) interior packer (8) is installed, the outside of outer tube (2) is set with sleeve pipe (1), upper packer (6) and lower packet (7) are installed between outer tube (2) and the sleeve pipe (1), distributor (5) is installed on the inwall of outer tube (2) middle part, and the upper end of inner tube (3) is connected with distributor (5), and outer tube is distributed with multi-openings on (2); It is characterized in that: cyclone (4) is installed on the upper inside wall of outer tube (2), described distributor (5) comprises distributor disk (5-1), a plurality of pistons (5-2) and a plurality of spring (5-3), distributor disk (5-1) is welded on the inwall of outer tube (2), and the upper end of inner tube (3) is welded on distributor disk (5-1), the part of the upper corresponding inner tube (3) of definition distributor disk (5-1) is border circular areas (9), remove the remaining part of border circular areas (9) on the definition distributor disk (5-1) and be defined as annular region (10), evenly offer a plurality of inverted round table in border circular areas (9) and the annular region (10) and join steam vent (5-4), each inverted round table is joined and is provided with piston (5-2) and spring (5-3) in the steam vent (5-4) from top to bottom, the upper end of spring (5-3) is welded on the piston (5-2), and the lower end of spring (5-3) is welded on inverted round table and joins on the hole wall of steam vent (5-4).
2. the equal mass dryness fraction steam distribution in separate layer of a kind of pressure-adjustable according to claim 1 instrument, it is characterized in that: the length of outer tube (2) is 6m, and external diameter is 114.3mm, and internal diameter is 12.3mm, and outer tube (2) adopts steel pipe to make.
3. the equal mass dryness fraction steam distribution in separate layer of a kind of pressure-adjustable according to claim 2 instrument, it is characterized in that: outer tube (2) is upper evenly to be provided with four row perforations along its circumferencial direction, vertical distance (L1) in every row perforation between adjacent two perforations is 406mm, perforation quantity in every row perforation is 15, four row perforations are defined as respectively first row perforation (2-1) in the direction of the clock, secondary series perforation (2-2), the 3rd row perforation (2-3) and the 4th row perforation (2-4), vertical distance (L2) in first row perforation (2-1) and the secondary series perforation (2-2) between adjacent two perforations is 203mm, vertical distance (L2) in the 3rd row perforation (2-3) and the 4th row perforation (2-4) between adjacent two perforations is 203mm, two adjacent in first row perforation (2-1) and the 3rd row perforation (2-3) perforations are on same level, and two adjacent in secondary series perforation (2-2) and the 4th row perforation (2-4) perforations are on same level.
4. the equal mass dryness fraction steam distribution in separate layer of a kind of pressure-adjustable according to claim 3 instrument, it is characterized in that: the perforation diameter is 16mm.
5. the equal mass dryness fraction steam distribution in separate layer of a kind of pressure-adjustable according to claim 4 instrument is characterized in that: be tilted to lower hole outside in perforation is served as reasons, the angle between axially bored line and the vertical curve is that 30 degree are between 60 degree.
6. the equal mass dryness fraction steam distribution in separate layer of a kind of pressure-adjustable according to claim 5 instrument is characterized in that: the quantity that the inverted round table in the border circular areas (9) is joined steam vent (5-4) is four.
7. the equal mass dryness fraction steam distribution in separate layer of a kind of pressure-adjustable according to claim 6 instrument is characterized in that: the quantity that the inverted round table in the annular region (10) is joined steam vent (5-4) is six.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104688863A CN102926729A (en) | 2012-11-20 | 2012-11-20 | Pressure-adjustable uniform-dryness layered steam distributing tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104688863A CN102926729A (en) | 2012-11-20 | 2012-11-20 | Pressure-adjustable uniform-dryness layered steam distributing tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233708A (en) * | 2013-04-22 | 2013-08-07 | 东北石油大学 | Rotary flow stabilizer |
| CN103306653A (en) * | 2013-06-26 | 2013-09-18 | 上海晟通石油设备有限公司 | Constant dryness distributor for steam water mixture in oil field steam injection boiler heating network |
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| US4109722A (en) * | 1977-04-28 | 1978-08-29 | Texaco Inc. | Thermal oil recovery method |
| CN2648058Y (en) * | 2003-07-01 | 2004-10-13 | 中国石油天然气股份有限公司 | Auto gas distribution valve for thickened oil injecting gas well |
| CN1746461A (en) * | 2004-09-10 | 2006-03-15 | 中国科学院力学研究所 | Self-adaptive laminated distributor under well |
| CN202900222U (en) * | 2012-11-20 | 2013-04-24 | 中国石油大学(华东) | Adjustable pressure even dryness layering steam distributing device |
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2012
- 2012-11-20 CN CN2012104688863A patent/CN102926729A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4109722A (en) * | 1977-04-28 | 1978-08-29 | Texaco Inc. | Thermal oil recovery method |
| CN2648058Y (en) * | 2003-07-01 | 2004-10-13 | 中国石油天然气股份有限公司 | Auto gas distribution valve for thickened oil injecting gas well |
| CN1746461A (en) * | 2004-09-10 | 2006-03-15 | 中国科学院力学研究所 | Self-adaptive laminated distributor under well |
| CN202900222U (en) * | 2012-11-20 | 2013-04-24 | 中国石油大学(华东) | Adjustable pressure even dryness layering steam distributing device |
Non-Patent Citations (1)
| Title |
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| 王新伟: "稠油井蒸汽等干度分配技术研究", 《中国优秀硕士学位论文全文数据库（电子期刊） 工程科技Ⅰ辑》, no. 4, 15 April 2011 (2011-04-15) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103233708A (en) * | 2013-04-22 | 2013-08-07 | 东北石油大学 | Rotary flow stabilizer |
| CN103233708B (en) * | 2013-04-22 | 2016-04-13 | 东北石油大学 | A kind of rotary current regulator |
| CN103306653A (en) * | 2013-06-26 | 2013-09-18 | 上海晟通石油设备有限公司 | Constant dryness distributor for steam water mixture in oil field steam injection boiler heating network |
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Application publication date: 20130213 |