CN104775797A - Self-flow-regulating parallel shunt - Google Patents

Self-flow-regulating parallel shunt Download PDF

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Publication number
CN104775797A
CN104775797A CN201510190475.6A CN201510190475A CN104775797A CN 104775797 A CN104775797 A CN 104775797A CN 201510190475 A CN201510190475 A CN 201510190475A CN 104775797 A CN104775797 A CN 104775797A
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CN
China
Prior art keywords
flow
pipeline
parallel shunt
self
nozzle
Prior art date
Application number
CN201510190475.6A
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Chinese (zh)
Inventor
不公告发明人
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北京沃客石油工程技术研究院
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Priority to CN201510190475.6A priority Critical patent/CN104775797A/en
Publication of CN104775797A publication Critical patent/CN104775797A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25Methods for stimulating production

Abstract

The invention provides a self-flow-regulating parallel shunt which comprises a self-flow-regulating spray nozzle (1), a parallel shunt body (2) and a flow limiter (3), wherein an outlet of the self-flow-regulating spray nozzle (1) is sequentially connected with the parallel shunt body (2) and the flow limiter (3); the self-flow-regulating spray nozzle (1) can be automatically regulated according to the flow change; after fluid enters the parallel shunt body (2), a flow limiting pipeline (21) and a friction resisting pipeline (22) automatically recognize the fluids with different properties for shunting; when the fluids are oil phase, the fluids mainly flow into the flow limiting pipeline (21), enter the flow limiter (3) along the radial direction and then directly flow out of the outlet, at the moment, a flow channel is short in length and small in flowing resistance; when the fluids are aqueous phase, the fluids mainly flow into the friction resisting pipeline (22), enter the flow limiter (3) along the tangential direction, rotate for multiple times and then flow out of the outlet, and at the moment, the flow channel is long in length and large in flowing resistance. Therefore the self-flow-regulating parallel shunt has the advantage that quick entering of the aqueous phase can be inhibited, so that long-term stable production of an oil-gas well can be guaranteed.

Description

A kind of from flow-regulating type parallel shunt

Technical field

The present invention relates to the device improving Development Response of Oilfield, particularly a kind of from flow-regulating type parallel shunt.

Background technology

In long horizontal well, due to the impact of " heel end effect " and/or reservoir heterogeneity, the output of oil well in some position will far away higher than other positions, thus the uneven production profile produced may cause pit shaft at these position premature water breakthrough/gas.Once bore into, because 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 tube completion etc.But the ability of regulation and control of these methods to inflow profile is limited, be difficult to ensure that production profile is enough even.

The nineties in last century is early stage, and Norsk Hydro (Norway's Hydro) company have developed inflow control device (ICDs) at first, and is successfully applied to Troll oil field first in 1998.End 2013, in succession develop dissimilar ICDs both at home and abroad, passive type inflow control device (PICD) and self adaptation inflow control device (AICD) can be summarized as.Wherein, passive type inflow control device (PICD), is become a mandarin by equilibrium and delays to see water/gas, but, once water/gas bore mutually into, because its viscosity is lower, oil well will be taken completely, and suppress the flowing of oil phase, cause ICD to lose efficacy, reduce oil well output.Self adaptation inflow control device (AICD), once see water/gas, this device will automatically identify and enlarge markedly resistance, thus suppresses the flowing of water/gas phase, ensures oil well long term stable production.But existing AICD also also exists complex structure, the shortcomings such as applicability is not strong.

Summary of the invention

In order to solve the technical problem that in prior art, self adaptation inflow control device complex structure applicability is not strong.The invention provides a kind of from flow-regulating type parallel shunt, rely on self-regulated stream nozzle and parallel shunt, can open according to uninterrupted or blocking portion passage, simultaneously can also identify fluid type and automatically adjust its flow resistance by device according to fluid properties: before non-water breakthrough, device convection cell has certain resistance, the impact of heel end effect and reservoir heterogeneity can be offset, make along horizontal wellbore inflow profile even; Once generation water breakthrough, flow resistance will significantly increase, and the flowing of water exit interval is suppressed, thus ensure Oil/gas Well long term stable production.

The present invention is the technical scheme solving the employing of its technical problem: a kind of from flow-regulating type parallel shunt, comprises self-regulated flow nozzle, parallel shunt and current limiter; Self-regulated stream nozzle contains fixing jet pipe, movable spouts, spring and nozzle overcoat, is positioned at parallel shunt front end, and fluid enters parallel shunt by the outlet of nozzle overcoat.Parallel shunt contains current limliting pipeline and frictional resistance pipeline, and current limliting pipeline is the pipeline that area of passage dilation is arranged alternately, and frictional resistance pipeline is the bending pipeline arranged, and the outlet of current limliting pipeline is all communicated with current limiter with the outlet of frictional resistance pipeline; Liquid enters current limiter after can flowing through current limliting pipeline and frictional resistance pipeline and discharges from the outlet of current limiter.

Current limiter is cylindrical, and current limiter is arranged on the end of described parallel shunt.

Radial direction along current limiter after liquid can flow through current limliting pipeline enters in current limiter.

Tangentially enter in current limiter along current limiter after liquid can flow through frictional resistance pipeline.

The straight tube that the multiple area of passage alternating expansion of current limiting tube route shrinks connects to form.

Frictional resistance pipeline is connected to form by multiple bent sub and straight tube.

Movable spouts is positioned at fixing jet pipe, and can be free to slide, and movable spouts end is affixed on spring.

Spring is positioned at fixing jet pipe, connect movable spouts outlet with fix jet pipe fixed end and can free-extension.

Fixing jet pipe one end is positioned at outside nozzle overcoat, and fixed end is positioned at nozzle overcoat.

There is gap between fixing jet pipe in nozzle overcoat and nozzle overcoat, and on body, be uniformly distributed the through hole of certain size and quantity, through hole is communicated with movable spouts outlet and gap.

Gap between nozzle overcoat with fixing jet pipe is communicated with nozzle overcoat and exports, and the current limliting line entry of nozzle overcoat outlet parallel shunt hinders line entry with mill.

The invention has the beneficial effects as follows: one can be opened or blocking portion passage according to fluid flow size automatically from flow-regulating type parallel shunt, control fluid inflow velocity, the fluid properties flowed into is identified and shunted simultaneously, adjustment flow resistance.Before the non-water breakthrough of oil well, of the present invention have certain resistance from flow-regulating type parallel shunt convection cell, can offset the impact of heel end effect and reservoir heterogeneity, makes the inflow profile on horizontal wellbore enough even; Once generation water breakthrough, the present invention identifies automatically to the fluid flowing into current divider, the ratio of alter two parallel pipelines (current limliting pipeline and frictional resistance pipeline) in current limiter, adjust the mode that it enters current limiter, flow resistance is enlarged markedly, thus suppress the flowing of water exit interval, ensure Oil/gas Well long term stable production.Namely when before the non-water breakthrough of oil well, the little speed of fluid flow is slow, the automatic opened portion subchannel of self-regulated flow nozzle, accelerate fluid and enter parallel shunt, now be mainly oil phase by the fluid of parallel shunt, fluid tends to flow into current limliting pipeline, directly flows out from outlet after radially entering discoidal current limiter, flow channel length is shorter, and flow resistance is less; And when oil well water breakthrough, the large speed of fluid flow is fast, self-regulated flow nozzle is automatic blocking portion passage under fluid matasomatism, slowing down fluid enters parallel shunt, is now mainly aqueous phase by the fluid of parallel shunt, and fluid tends to flow into frictional resistance pipeline, tangentially enter discoidal current limiter, rotate for several times and flow out from outlet, flow channel length is longer, and flow resistance is larger.

Accompanying drawing explanation

Be described in further detail from flow-regulating type parallel shunt of the present invention below in conjunction with accompanying drawing.

Fig. 1 is this structural representation from flow-regulating type parallel shunt.

Wherein 1. self-regulated flow nozzles, 11. fixing jet pipes, 111. through holes, 112. fixed ends, 12. movable spouts, 121. movable spouts outlets, 13. springs, 14. nozzle overcoats, 141. gaps, 142. nozzle overcoat outlets, 2. parallel shunt, 21. current limliting pipelines, 211. current limliting line entry, 212. current limiting tube way outlets, 22. mill resistance pipelines, 221. mill resistance line entry, 222. mill resistance tube outlet, 3. current limiters, 31. outlets

Detailed description of the invention

Be described in further detail from flow-regulating type parallel shunt of the present invention below in conjunction with accompanying drawing.A kind of from flow-regulating type parallel shunt, comprise self-regulated stream nozzle 1, parallel shunt 2 and current limiter 3; Self-regulated stream nozzle contains fixing jet pipe 11, movable spouts 12, spring 13 and nozzle overcoat 14, is positioned at parallel shunt 2 front end, and fluid enters parallel shunt 2 by nozzle overcoat outlet 142;

Parallel current divider 2 is containing current limliting pipeline 21 and frictional resistance pipeline 22, the pipeline that current limliting pipeline 21 is arranged alternately for area of passage dilation, frictional resistance pipeline 22 is the bending pipeline arranged, the entrance 211 of current limliting pipeline all exports 142 with nozzle overcoat with the entrance 221 of frictional resistance pipeline and is communicated with, the outlet 212 of current limliting pipeline is all communicated with current limiter 3 with the outlet 222 of frictional resistance pipeline, the fluid entering self-regulated flow nozzle enters current limliting pipeline 21 and frictional resistance pipeline 22 by nozzle overcoat outlet 142, liquid enters current limiter 3 after can flowing through current limliting pipeline 21 and frictional resistance pipeline 22 and discharges from the outlet 31 of current limiter, as shown in Figure 1.

Described movable spouts 12 can be free to slide under the effect of fluid and spring 13 in fixing jet pipe 11, when the flow that fluid flows into movable spouts 12 changes, the active force of fluid matasomatism on movable spouts 12 changes thereupon, causes spring 13 to elongate or shorten to make movable spouts 12 be in dynamic equilibrium all the time.Meanwhile, the partial through holes 111 on fixing jet pipe 11 will be opened or block, and the area of passage in the gap 141 exported between 121 to nozzle housing 14 and fixing jet pipe 11 by movable spouts changes, thus controls the speed that fluid flows into self-regulated flow nozzle 1.

The pipeline that described current limliting pipeline 21 is shunk by a series of area of passage alternating expansion is in series, and as in Fig. 1, current limliting pipeline 21 resistance is mainly local head loss, and segments, the caliber of its drag size and pipeline are relevant.Described frictional resistance pipeline 22 extends length of pipe by the mode such as bent sub, pitch of the laps, and frictional resistance pipeline 22 is connected to form by multiple bent sub and straight tube, and its resistance is mainly frictional head loss, and drag size is relevant with the length of pipeline.The mode entering disc current limiter 3 according to fluid is different, and can produce different metering functions, the flow resistance size produced is relevant with the size of disc current limiter 3.This parallel shunt can, according to the difference of fluid properties, make fluid different with the flow resistance in frictional resistance pipeline 22 at current limliting pipeline 21, thus the ratio that automatic adjustment fluid is shunted in current limliting pipeline 21 and frictional resistance pipeline 22.

Operating principle of the present invention is by movable spouts 12 dynamic equilibrium control flow check rate of flow of fluid, when the flow that fluid flows into movable spouts 12 increases, the active force of fluid matasomatism on movable spouts 12 increases thereupon, the jet pipe 12 that innervates moves to the fixed end 112 of fixing jet pipe 11, spring 13 is compressed until movable spouts 12 is in equilibrium state again simultaneously, in the process of movable spouts 12 to fixed end 112 movement of fixing jet pipe 11, partial through holes 111 on fixing jet pipe 11 is by blocked, the area of passage in the gap 141 exported between 121 to nozzle overcoat 14 and fixing jet pipe 11 by movable spouts reduces, slow down the speed that fluid flows into self-regulated flow nozzle 1.When the flow that fluid flows into movable spouts 12 reduces, the active force of fluid matasomatism on movable spouts 12 reduces thereupon, movable spouts 12 moves to the direction away from fixing jet pipe fixed end 112 under the effect of spring 13, until be again in equilibrium state, at movable spouts 12 in the process away from fixing jet pipe fixed end 112 direction movement, passage portion 111 on fixing jet pipe 11 will be opened, the area of passage in the gap 141 exported between 121 to nozzle overcoat 14 and fixing jet pipe 11 by movable spouts increases, and facilitates the speed that fluid flows into self-regulated flow nozzle 1.

Meanwhile, for the fluid entering self-regulated flow nozzle 1, parallel shunt 2 is utilized to identify the fluid of heterogeneity (viscosity, density) and to produce different current limliting resistances.The outlet 212 of current limliting pipeline is towards the radial direction of current limiter 3, and the radial direction along current limiter 30 after liquid can flow through current limliting pipeline 21 enters in current limiter 3.Tangential towards current limiter 3 of the outlet 222 of frictional resistance pipeline, tangentially entering in current limiter 3 along current limiter 3 after liquid can flow through frictional resistance pipeline 22.The length of current limliting pipeline 21 is less than the length of frictional resistance pipeline 22.

Specifically, when the fluid that the less density of viscosity is larger passes through parallel shunt 2, fluid enters current limiter 3 after can flowing through current limliting pipeline 21 and frictional resistance pipeline 22, but the resistance of frictional resistance pipeline 22 to this fluid in parallel shunt 2 is less than the resistance of current limliting pipeline 21 to this fluid, so fluid is more prone to flow into frictional resistance pipeline 22, and produce high-speed rotational after tangentially entering disc current limiter 3, flow out rotating in current limiter 3 for several times from the outlet 31 of current limiter, be similar to and do the motion of the nearly heart, flow channel length is longer, and flow resistance is larger; When the fluid that viscosity greater density is less passes through parallel shunt 2, fluid enters current limiter 3 after can flowing through current limliting pipeline 21 and frictional resistance pipeline 22, but the resistance of frictional resistance pipeline 22 to this fluid in parallel shunt 2 is greater than the resistance of current limliting pipeline 21 to this fluid, so fluid is more prone to flow into current limliting pipeline 21, then after radially entering current limiter 3, the direct outlet 31 from current limiter is flowed out, now flow channel length is shorter, and flow resistance is less.

Claims (12)

1. from a flow-regulating type parallel shunt, it is characterized in that, describedly comprise self-regulated flow nozzle (1), parallel shunt (2) and current limiter (3) from flow-regulating type parallel shunt;
Self-regulated flow nozzle (1) is containing fixing jet pipe (11), movable spouts (12), spring (13) and nozzle overcoat (14), be positioned at parallel shunt (2) front end, fluid enters parallel shunt (2) by nozzle overcoat outlet (142);
Parallel shunt (2) is containing current limliting pipeline (21) and frictional resistance pipeline (22), the pipeline that current limliting pipeline (21) is arranged alternately for area of passage dilation, frictional resistance pipeline (22) is the bending pipeline arranged, the entrance (211) of current limliting pipeline and the entrance (221) of frictional resistance pipeline all export (142) and are communicated with nozzle overcoat, the outlet (212) of current limliting pipeline is all communicated with current limiter (3) with the outlet (222) of frictional resistance pipeline;
Liquid can pass through self-regulated flow nozzle (1), enters current limiter (3) and discharge from the outlet (31) of current limiter through current limliting pipeline (21) and frictional resistance pipeline (22).
2. according to claim 1 from flow-regulating type parallel shunt, it is characterized in that: current limiter (3) is for cylindrical, and current limiter (3) is arranged on the end of described parallel shunt (2).
3. parallel shunt according to claim 1 and 2, is characterized in that: the radial direction along current limiter (3) after liquid can flow through current limliting pipeline (21) enters in current limiter (3).
4. parallel shunt according to claim 1 and 2, is characterized in that: tangentially entering in current limiter (3) along current limiter (3) after liquid can flow through frictional resistance pipeline (22).
5. parallel shunt according to claim 1 and 2, is characterized in that: the straight tube that current limliting pipeline (21) is shunk by multiple area of passage alternating expansion connects to form.
6. parallel shunt according to claim 1 and 2, is characterized in that: frictional resistance pipeline (22) is connected to form by multiple bent sub and straight tube.
7. self-regulated flow nozzle according to claim 1, it is characterized in that: described self-regulated flow nozzle (1) is arranged on the front end of parallel shunt (2), self-regulated flow nozzle (1) comprises fixing jet pipe (11), movable spouts (12), spring (13) and nozzle overcoat (14).
8. the self-regulated flow nozzle according to claim 1 or 7, it is characterized in that: movable spouts (12) is positioned at fixing jet pipe (11), and can be free to slide, movable spouts (12) end is affixed on spring (13).
9. the spring according to claim 1 or 7, it is characterized in that: spring (13) is positioned at fixing jet pipe (11), connect movable spouts outlet (121) and fixing jet pipe fixed end (112) and can free-extension.
10. the self-regulated flow nozzle according to claim 1 or 7, is characterized in that: fixing jet pipe (11) one end is positioned at nozzle overcoat (14) outward, and fixed end (112) is positioned at nozzle overcoat (14).
11. self-regulated flow nozzles according to claim 1 or 7, it is characterized in that: be positioned between the fixing jet pipe (11) of nozzle overcoat (14) and nozzle overcoat (14) and there is gap (141), and on body, being uniformly distributed the through hole (111) of certain size and quantity, through hole (111) is communicated with movable spouts outlet (121) and gap (141).
12. self-regulated flow nozzles according to claim 1 or 7, it is characterized in that: the gap (141) between nozzle overcoat with fixing jet pipe is communicated with nozzle overcoat and exports (142), and the current limliting line entry (211) that nozzle overcoat outlet (142) is communicated with parallel shunt (2) hinders line entry (221) with mill.
CN201510190475.6A 2015-04-17 2015-04-17 Self-flow-regulating parallel shunt CN104775797A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604536A (en) * 2016-03-14 2016-05-25 中国石油大学(北京) Underground oil-water separator and separation system

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Publication number Priority date Publication date Assignee Title
US20130075107A1 (en) * 2009-08-18 2013-03-28 Halliburton Energy Services, Inc. Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system
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
CN103883295A (en) * 2014-03-25 2014-06-25 中国石油大学(北京) Parallel type inflow control box and parallel type inflow control device
CN103958826A (en) * 2011-11-14 2014-07-30 哈里伯顿能源服务公司 Preventing flow of undesired fluid through variable flow resistance system in well
CN103998711A (en) * 2011-12-16 2014-08-20 哈利伯顿能源服务公司 Fluid flow control
CN204627566U (en) * 2015-04-17 2015-09-09 北京沃客石油工程技术研究院 A kind of from flow-regulating type parallel shunt

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130075107A1 (en) * 2009-08-18 2013-03-28 Halliburton Energy Services, Inc. Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system
CN103958826A (en) * 2011-11-14 2014-07-30 哈里伯顿能源服务公司 Preventing flow of undesired fluid through variable flow resistance system in well
CN103998711A (en) * 2011-12-16 2014-08-20 哈利伯顿能源服务公司 Fluid 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
CN103883295A (en) * 2014-03-25 2014-06-25 中国石油大学(北京) Parallel type inflow control box and parallel type inflow control device
CN204627566U (en) * 2015-04-17 2015-09-09 北京沃客石油工程技术研究院 A kind of from flow-regulating type parallel shunt

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604536A (en) * 2016-03-14 2016-05-25 中国石油大学(北京) Underground oil-water separator and separation system

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Application publication date: 20150715