CN104963665A - Bridge type concentric profile control water distribution device - Google Patents
Bridge type concentric profile control water distribution device Download PDFInfo
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- CN104963665A CN104963665A CN201510332234.0A CN201510332234A CN104963665A CN 104963665 A CN104963665 A CN 104963665A CN 201510332234 A CN201510332234 A CN 201510332234A CN 104963665 A CN104963665 A CN 104963665A
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- profile control
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Abstract
The invention provides a bridge type concentric profile control water distribution device. The bridge type concentric profile control water distribution device comprises an upper connector, a connecting sleeve, a working cylinder and a lower connector which are sequentially connected from top to bottom, wherein a positioning shaft is arranged in the connecting sleeve, a testing and regulation interface is formed in the positioning shaft, a tapered movable water nozzle is arranged in the working cylinder, and the lower end of the testing and regulation interface is connected with the tapered movable water nozzle. The bridge type concentric profile control water distribution device can effectively prevent mechanical shear effect, enables viscosity loss of a polymer solution to be reduced and ensures the viscosity retention rate in the profile control process. In addition, an overflow end face has a better throttling role, flow-limiting resistance is large, throttling pressure difference is large, and two functions of separated layer water injection and chemical profile control of the device are achieved.
Description
Technical field
The invention belongs to oil-field flooding technical field, be specifically related to the concentric profile control water distribution device of a kind of bridge-type.
Background technology
Water injection tool and instrument are the bases that water injection technology is implemented, and the development of its quality and performance to water injection technology has decisive role.Bridge-type concentric separated-injection technology is made up of bridge-type concentric roater regulator, concentric electronic downhole measurement adjusting instrument, electronic seal-checking instrument, ground controller.Bridge-type concentric roater regulator and separate injection tubing string one remove into, adjustable water nozzle is equipped with in inside, electronic seal-checking instrument and measurement and adjustment instrument by under cable to separate injection tubing string, dock with seating nipple 3, ground directly-reading realizes testing envelope and flow measuring and adjusting.Ground controller is obtained by cable and tests seal pressure data or survey pressure regulation power temperature flow data, and controls in real time seal-checking instrument and measurement and adjustment instrument.
Current bridge-type concentric roater regulator is by hole mouth throttling, and injection of polymer shear stability is poor, and in the injection of High Pressure Difference, injection of polymer is subject to larger shearing force, and its viscosity can decline to a great extent (reaching as high as 50%), has a strong impact on polymer performance.
Summary of the invention
The object of the invention is to overcome existing bridge-type concentric roater regulator by hole mouth throttling, injection of polymer shear stability is poor, the problem that viscosity can decline to a great extent.
For this reason, the invention provides the concentric profile control water distribution device of a kind of bridge-type, comprise connect successively from top to bottom top connection, adapter sleeve, seating nipple, lower contact, locating shaft is provided with in described adapter sleeve, be provided with in described locating shaft and survey transfer mouth, be provided with the movable water nozzle of gradual change type in described seating nipple, described survey transfer mouth lower end is connected with the movable water nozzle of gradual change type;
Described seating nipple inwall is provided with multistage interior waveform tongue and groove, the movable water nozzle outer wall of described gradual change type is provided with the outer waveform tongue and groove matched with the multistage interior waveform tongue and groove of seating nipple inwall, forms fluid passage between described interior waveform tongue and groove and outer waveform tongue and groove;
Support column is provided with in described seating nipple, described support column connects with the movable water nozzle lower end of gradual change type, and joint is provided with groove, this groove communicates with lower end, fluid passage, the outer side of described seating nipple is provided with water filling port, this water filling port is concordant with the upper end of the movable water nozzle of gradual change type, and communicates with upper end, fluid passage.
In described locating shaft, upper end is evenly provided with 4 grooves.
Described top connection and lower contact are equipped with screw thread.
Described survey transfer mouth lower end and the movable water nozzle of gradual change type adopt screwed connection.
The movable water nozzle of described gradual change type is stainless steel.
The invention has the beneficial effects as follows: the flowing of profile control solution in the concentric profile control water distribution device of this bridge-type provided by the invention is relatively more steady, can effectively prevent mechanical shearing effect, decrease the viscosity loss of polymer solution, guarantee the viscosity retention ratio of profile control process.Meanwhile, overflowing end face has good throttling action, and current limliting resistance is large, and chock pressure difference is large, realizes seperated layer water injection and chemical profile control two kinds of functions of this device.
Be described in further details below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is gradual change type of the present invention movable water nozzle open mode schematic diagram;
Fig. 3 is gradual change type of the present invention movable water nozzle closed condition schematic diagram.
In figure: 1, top connection; 2, adapter sleeve; 3, seating nipple; 4, locating shaft; 5, transfer mouth is surveyed; 6, the movable water nozzle of gradual change type; 7, lower contact; 8, water filling port; 9, support column; 10, interior waveform tongue and groove; 11, outer waveform tongue and groove; 12, central passage; 13, fluid passage.
Detailed description of the invention
The essence of injection allocation instrument changes flow by controlling pressure reduction, but inevitably produce viscosity loss while producing pressure reduction, current bridge-type concentric roater regulator is by hole mouth throttling, injection of polymer shear stability is poor, in the injection of High Pressure Difference, injection of polymer is subject to larger shearing force, and its viscosity can decline to a great extent (reaching as high as 50%), has a strong impact on polymer performance.In order to realize the technical need of dispensing well fixed tubular column profile control, design injection liquid control mode need be changed.
Embodiment 1:
Present embodiments provide the concentric profile control water distribution device of a kind of bridge-type, comprise connect successively from top to bottom top connection 1, adapter sleeve 2, seating nipple 3, lower contact 7, locating shaft 4 is provided with in described adapter sleeve 2, be provided with in described locating shaft 4 and survey transfer mouth 5, be provided with the movable water nozzle 6 of gradual change type in described seating nipple 3, described survey transfer mouth 5 lower end is connected with the movable water nozzle 6 of gradual change type;
Described seating nipple 3 inwall is provided with multistage interior waveform tongue and groove 10, movable water nozzle 6 outer wall of described gradual change type is provided with the outer waveform tongue and groove 11 matched with the multistage interior waveform tongue and groove 10 of seating nipple 3 inwall, forms fluid passage 13 between described interior waveform tongue and groove 10 and outer waveform tongue and groove 11;
Support column 9 is provided with in described seating nipple 3, described support column 9 connects with movable water nozzle 6 lower end of gradual change type, and joint is provided with groove, this groove communicates with lower end, fluid passage 13, the described outer side of seating nipple 3 is provided with water filling port 8, this water filling port 8 is concordant with the upper end of the movable water nozzle 6 of gradual change type, and communicates with upper end, fluid passage 13.
When the water dispensing apparatus water filling using the present embodiment to provide regulates, measurement and adjustment instrument detent mechanism docks with water dispensing apparatus locating shaft 4, governor motion docks with survey transfer mouth 5, and drive survey transfer mouth 5 to rotate, survey transfer mouth 5 and drive movable water nozzle 6 axially-movable of gradual change type, realize the movable water nozzle 6 of gradual change type and coordinate different gap with the multistage interior waveform tongue and groove 10 of seating nipple 3, namely realize the fluid passage 13 of different flow, thus realize the adjustment of layered waterflooding quantity.
In implementation process, injection water or profile control agent enter central passage 12 from top connection 1, lower end, fluid passage 13 is entered by groove after flowing to support column 9, water filling port 8 is entered by upper end, fluid passage 13 after flowing through fluid passage 13, complete and inject water and profile control agent and flow to outside pipe in managing, and then enter stratum.In profile control process, because profile control agent particle diameter is comparatively large, and viscosity is higher, in order to reduce the shear action of water dispensing apparatus, being adjusted to maximum, realizing the operation of dispensing well layered profile control by movable for gradual change type water nozzle 6 with the fit clearance of the multistage interior waveform tongue and groove 10 of seating nipple 3.
The present invention changes the movable water nozzle plane structure of current seperated layer water injection injection well downhole flow regulator, adopts the movable water nozzle 6 of gradual change type, and meanwhile, the multistage interior waveform tongue and groove 10 of seating nipple 3 inside processing, is formed with the movable water nozzle 6 of gradual change type and coordinate, realize the adjustment of layered waterflooding quantity; The multi-stage annular space that multistage waveform tongue and groove on the movable water nozzle 6 of gradual change type and the interior waveform tongue and groove 10 of seating nipple 3 are formed, namely fluid passage 13 can accumulation pressure reduction, add profile control agent arrives water filling port 8 in oil pipe distance by the movable water nozzle 6 of gradual change type, the multi-stage annular space formed can realize low sheraing flow-control, the flowing of profile control solution in injection allocation apparatus is more steady, can effectively prevent mechanical shearing effect, decrease the viscosity loss of polymer solution, guarantee the viscosity retention ratio of profile control process.Reduce the shear action to profile control agent, realize seperated layer water injection and chemical profile control two kinds of functions of this device.
Embodiment 2:
On the basis of embodiment 1, embodiment provides the concentric profile control water distribution device of a kind of bridge-type as shown in Figure 1, survey transfer mouth 5 lower end and the movable water nozzle 6 of gradual change type adopt screwed connection, in locating shaft 4, upper end is evenly provided with 4 grooves, measurement and adjustment instrument detent mechanism docks with this device locating shaft 4, anti-rotation structure inserts in the groove of 4, locating shaft 4 top, governor motion docks with survey transfer mouth 5, and drive survey transfer mouth 5 to rotate, survey transfer mouth 5 and drive movable water nozzle 6 axially-movable of gradual change type, realize the movable water nozzle 6 of gradual change type and multistage interior waveform tongue and groove 10 different fit clearance of seating nipple 3, thus realize the adjustment of layered waterflooding quantity.
Top connection 1 and lower contact 7 are equipped with screw thread, can become multiple tubing round thread pattern according to the Design of Screw Thread of oil pipe.The movable water nozzle 6 of gradual change type is stainless steel, and changing current seperated layer water injection injection well downhole flow regulator water nozzle is ceramic material, improves the anti-current-rush ability of the movable water nozzle 6 of gradual change type.
As shown in Figure 2, the movable water nozzle 6 of gradual change type drives by surveying transfer mouth 5, axially-movable, between the movable water nozzle 6 of gradual change type and seating nipple 3, annular space is not closed, can meet and inject water and profile control agent and pass through, when water filling port 8 enters stratum, the movable water nozzle 6 of gradual change type is open mode.
As shown in Figure 3, the movable water nozzle 6 of gradual change type drives by surveying transfer mouth 5, axially-movable, when moving to that between the movable water nozzle 6 of gradual change type and seating nipple 3, multi-stage annular space is closed, inject water and profile control agent cannot by time, gradual change type activity water nozzle 6 is closed condition.
In sum, the concentric profile control water distribution device of this bridge-type that inventing provides can effectively prevent mechanical shearing effect, decreases the viscosity loss of polymer solution, guarantees the viscosity retention ratio of profile control process.Meanwhile, overflowing end face has good throttling action, and current limliting resistance is large, and chock pressure difference is large, realizes seperated layer water injection and chemical profile control two kinds of functions of this device.
The present embodiment does not have specifically described part all to belong to common practise and the known technology of the art, describes in detail no longer one by one herein.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (5)
1. the concentric profile control water distribution device of bridge-type, comprise connect successively from top to bottom top connection (1), adapter sleeve (2), seating nipple (3), lower contact (7), it is characterized in that: in described adapter sleeve (2), be provided with locating shaft (4), described locating shaft (is provided with in 4 and surveys transfer mouth (5, be provided with the movable water nozzle (6) of gradual change type in described seating nipple (3), described survey transfer mouth (5) lower end is connected with the movable water nozzle (6) of gradual change type;
Described seating nipple (3) inwall is provided with multistage interior waveform tongue and groove (10), movable water nozzle (6) outer wall of described gradual change type is provided with the outer waveform tongue and groove (11) matched with the multistage interior waveform tongue and groove (10) of seating nipple (3) inwall, forms fluid passage (13) between described interior waveform tongue and groove (10) and outer waveform tongue and groove (11);
Support column (9) is provided with in described seating nipple (3), described support column (9) connects with movable water nozzle (6) lower end of gradual change type, and joint is provided with groove, this groove communicates with fluid passage (13) lower end, described seating nipple (3) outer side is provided with water filling port (8), this water filling port (8) is concordant with the upper end of the movable water nozzle (6) of gradual change type, and communicates with fluid passage (13) upper end.
2. the concentric profile control water distribution device of a kind of bridge-type according to claim 1, is characterized in that: described locating shaft (4) interior upper end is evenly provided with 4 grooves.
3. the concentric profile control water distribution device of a kind of bridge-type according to claim 1, is characterized in that: described top connection (1) and lower contact (7) are equipped with screw thread.
4. the concentric profile control water distribution device of a kind of bridge-type according to claim 1, is characterized in that: described survey transfer mouth (5) lower end and the movable water nozzle (6) of gradual change type adopt screwed connection.
5. the concentric profile control water distribution device of a kind of bridge-type according to claim 1, is characterized in that: the movable water nozzle (6) of described gradual change type is stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510332234.0A CN104963665A (en) | 2015-06-16 | 2015-06-16 | Bridge type concentric profile control water distribution device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510332234.0A CN104963665A (en) | 2015-06-16 | 2015-06-16 | Bridge type concentric profile control water distribution device |
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| CN104963665A true CN104963665A (en) | 2015-10-07 |
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| CN201510332234.0A Pending CN104963665A (en) | 2015-06-16 | 2015-06-16 | Bridge type concentric profile control water distribution device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257268A (en) * | 2015-10-10 | 2016-01-20 | 中国石油天然气股份有限公司 | Bridge type concentric polymer distributor for separate-layer polymer injection well |
| CN105484714A (en) * | 2015-10-13 | 2016-04-13 | 中国石油天然气股份有限公司 | Concentric polymer allocator |
| CN107060710A (en) * | 2017-03-15 | 2017-08-18 | 上海嘉地仪器有限公司 | Bridge-type matches somebody with somebody poly- device with one heart |
| CN107762460A (en) * | 2017-11-02 | 2018-03-06 | 中国石油天然气股份有限公司 | It is a kind of to integrate the bridge-type concentric roater regulator for testing and sealing and surveying and adjust |
| CN108166958A (en) * | 2017-12-26 | 2018-06-15 | 四川省科学城久利电子有限责任公司 | A kind of shunting intelligent watering device for oil field big flow water filling |
| CN108999590A (en) * | 2017-06-06 | 2018-12-14 | 中国石油天然气股份有限公司 | Profile control tool, dispensing profile control integrated pipe column and technique |
| CN109025927A (en) * | 2018-07-23 | 2018-12-18 | 中国海洋石油集团有限公司 | A kind of underground injection device of changeable polymer viscosity |
| CN109915091A (en) * | 2017-12-13 | 2019-06-21 | 中国石油化工股份有限公司 | A kind of layered profile control, water filling integrated tool |
| CN111852421A (en) * | 2019-04-30 | 2020-10-30 | 中国石油天然气股份有限公司 | Large differential pressure separated injection multi-stage regulation and control water distributor |
| CN112682011A (en) * | 2020-12-28 | 2021-04-20 | 中国海洋石油集团有限公司 | Chemical flooding multi-medium central channel type injection allocation device |
| CN114352246A (en) * | 2022-01-12 | 2022-04-15 | 靖江市强林石油钻采设备制造有限公司 | Multi-structure adjustable bridge type concentric water distributor |
| CN116517514A (en) * | 2023-07-05 | 2023-08-01 | 大庆市璞庆钻采设备制造有限公司 | Injection anti-shearing water distributor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2565982Y (en) * | 2002-08-06 | 2003-08-13 | 大庆油田有限责任公司 | Polymer variable diameter eccentric injection allocation device |
| US20080264634A1 (en) * | 2005-11-25 | 2008-10-30 | Zinoviy Dmitrievich Khomynets | Well Jet Device and the Operating Method Thereof |
| CN202850960U (en) * | 2012-10-09 | 2013-04-03 | 冯小红 | Axial screw-type sealing injection allocation device |
| CN103104231A (en) * | 2013-01-31 | 2013-05-15 | 中国石油天然气股份有限公司 | Bridge type concentric continuous adjustable water distributor |
| CN203321465U (en) * | 2013-04-19 | 2013-12-04 | 陕西博迪昊泰石油科技有限责任公司 | Bridge type concentric water distributor |
| CN203584392U (en) * | 2013-09-10 | 2014-05-07 | 西安思坦仪器股份有限公司 | Downhole adjustable shut-off concentric water distribution working barrel |
| CN203626772U (en) * | 2013-11-05 | 2014-06-04 | 中国石油天然气股份有限公司 | Concentric water distributor and adjustable separate layer water injection string for slim-hole ground |
| CN204782959U (en) * | 2015-06-16 | 2015-11-18 | 中国石油天然气股份有限公司 | Concentric profile control water distribution device of bridge type |
-
2015
- 2015-06-16 CN CN201510332234.0A patent/CN104963665A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2565982Y (en) * | 2002-08-06 | 2003-08-13 | 大庆油田有限责任公司 | Polymer variable diameter eccentric injection allocation device |
| US20080264634A1 (en) * | 2005-11-25 | 2008-10-30 | Zinoviy Dmitrievich Khomynets | Well Jet Device and the Operating Method Thereof |
| CN202850960U (en) * | 2012-10-09 | 2013-04-03 | 冯小红 | Axial screw-type sealing injection allocation device |
| CN103104231A (en) * | 2013-01-31 | 2013-05-15 | 中国石油天然气股份有限公司 | Bridge type concentric continuous adjustable water distributor |
| CN203321465U (en) * | 2013-04-19 | 2013-12-04 | 陕西博迪昊泰石油科技有限责任公司 | Bridge type concentric water distributor |
| CN203584392U (en) * | 2013-09-10 | 2014-05-07 | 西安思坦仪器股份有限公司 | Downhole adjustable shut-off concentric water distribution working barrel |
| CN203626772U (en) * | 2013-11-05 | 2014-06-04 | 中国石油天然气股份有限公司 | Concentric water distributor and adjustable separate layer water injection string for slim-hole ground |
| CN204782959U (en) * | 2015-06-16 | 2015-11-18 | 中国石油天然气股份有限公司 | Concentric profile control water distribution device of bridge type |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257268A (en) * | 2015-10-10 | 2016-01-20 | 中国石油天然气股份有限公司 | Bridge type concentric polymer distributor for separate-layer polymer injection well |
| CN105257268B (en) * | 2015-10-10 | 2018-03-09 | 中国石油天然气股份有限公司 | A kind of layered polymer injection well matches somebody with somebody poly- device with one heart with bridge-type |
| CN105484714A (en) * | 2015-10-13 | 2016-04-13 | 中国石油天然气股份有限公司 | Concentric polymer allocator |
| CN107060710A (en) * | 2017-03-15 | 2017-08-18 | 上海嘉地仪器有限公司 | Bridge-type matches somebody with somebody poly- device with one heart |
| CN108999590B (en) * | 2017-06-06 | 2021-07-02 | 中国石油天然气股份有限公司 | Profile control tool, separate injection profile control integrated pipe column and process |
| CN108999590A (en) * | 2017-06-06 | 2018-12-14 | 中国石油天然气股份有限公司 | Profile control tool, dispensing profile control integrated pipe column and technique |
| CN107762460A (en) * | 2017-11-02 | 2018-03-06 | 中国石油天然气股份有限公司 | It is a kind of to integrate the bridge-type concentric roater regulator for testing and sealing and surveying and adjust |
| CN109915091A (en) * | 2017-12-13 | 2019-06-21 | 中国石油化工股份有限公司 | A kind of layered profile control, water filling integrated tool |
| CN108166958B (en) * | 2017-12-26 | 2020-07-03 | 四川省科学城久利电子有限责任公司 | A shunting intelligence injection mandrel for large-traffic water injection in oil field |
| CN108166958A (en) * | 2017-12-26 | 2018-06-15 | 四川省科学城久利电子有限责任公司 | A kind of shunting intelligent watering device for oil field big flow water filling |
| CN109025927A (en) * | 2018-07-23 | 2018-12-18 | 中国海洋石油集团有限公司 | A kind of underground injection device of changeable polymer viscosity |
| CN109025927B (en) * | 2018-07-23 | 2020-09-01 | 中国海洋石油集团有限公司 | Underground injection device capable of changing polymer viscosity |
| CN111852421A (en) * | 2019-04-30 | 2020-10-30 | 中国石油天然气股份有限公司 | Large differential pressure separated injection multi-stage regulation and control water distributor |
| CN111852421B (en) * | 2019-04-30 | 2022-08-30 | 中国石油天然气股份有限公司 | Large differential pressure separated injection multi-stage regulation and control water distributor |
| CN112682011A (en) * | 2020-12-28 | 2021-04-20 | 中国海洋石油集团有限公司 | Chemical flooding multi-medium central channel type injection allocation device |
| CN114352246A (en) * | 2022-01-12 | 2022-04-15 | 靖江市强林石油钻采设备制造有限公司 | Multi-structure adjustable bridge type concentric water distributor |
| CN116517514A (en) * | 2023-07-05 | 2023-08-01 | 大庆市璞庆钻采设备制造有限公司 | Injection anti-shearing water distributor |
| CN116517514B (en) * | 2023-07-05 | 2023-09-08 | 大庆市璞庆钻采设备制造有限公司 | Injection anti-shearing water distributor |
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Application publication date: 20151007 |
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