CN103089222A - Polymer injection device free from dropping and fishing - Google Patents

Polymer injection device free from dropping and fishing Download PDF

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Publication number
CN103089222A
CN103089222A CN2013100614935A CN201310061493A CN103089222A CN 103089222 A CN103089222 A CN 103089222A CN 2013100614935 A CN2013100614935 A CN 2013100614935A CN 201310061493 A CN201310061493 A CN 201310061493A CN 103089222 A CN103089222 A CN 103089222A
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China
Prior art keywords
bar
main body
dragging
fusiformis
throttling
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CN2013100614935A
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Chinese (zh)
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CN103089222B (en
Inventor
马中原
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Mudanjiang Jinheng Petroleum Machinery Technology Co ltd
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Individual
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Priority to CN201310061493.5A priority Critical patent/CN103089222B/en
Publication of CN103089222A publication Critical patent/CN103089222A/en
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Publication of CN103089222B publication Critical patent/CN103089222B/en
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Abstract

The invention relates to a polymer injection device free from dropping and fishing. The polymer injection device comprises a polymer injection device body (1) and a throttling core (2). A core rod (25) is arranged below a fishing rod (22) and can be driven by the fishing rod (22) to rotate with the fishing rod (22). A connecting sleeve (26) is arranged below an upper main body (21), wherein the upper end of the connecting sleeve (26) is connected with the upper main body (21). A nut (27) sleeved on the core rod (25) is installed in a fusiform rod (24). Fusiform holes matched with the outer wall of the fusiform rod (24) of the throttling core are formed in the part inner wall between a liquid inlet (31) and a liquid outlet (32) of a throttling core hole (3) of a main body (11) of the polymer injection device body (1). When the polymer injection device is used, the throttling core does not need to be pulled out of the ground so as to be changed, flow and pressure drop can be directly adjusted by a tool in the down hole, and therefore the polymer injection operation free from dropping and fishing working can be achieved through polymer injection work, manpower, material resources and time can be greatly saved, precision and reliability of polymer injection are improved, oil extraction cost is reduced indirectly, and oil extraction efficiency is improved.

Description

Casting and dragging free is annotated poly-device
Technical field
The present invention relates to petroleum tool, be specifically related to the poly-device of a kind of notes for oil field water well depositing polymer.
Background technology
Along with the development of China's tertiary oil production in oil field, eccentric depositing polymer technology is applied more and more widely, and has received well poly-oily effect.But the existing eccentric poly-following problem of instrument ubiquity of annotating: when 1, notes are poly-, the adjusting of flow and pressure drop will realize by the fusiformis throttling fuse of changing the different size model, when changing, the throttling fuse need to it be salvaged ground with special tool, drop into again new throttling fuse, repeatedly change and adjust, until pressure drop and flow are suitable, process is complicated and cumbersome; 2, during depositing, the injection parameter of the throttling fuse that every replacing one-level throttling fuse all can have been adjusted other interval exerts an influence, need again the interval of parameter change is readjusted parameter, need pulling repeatedly and change the throttling fuse, will also can only reach near design load through adjustment many times in theory.
Summary of the invention
The purpose of this invention is to provide a kind of casting and dragging free of changing, can directly directly regulating with instrument convection current amount, pressure drop in the down-hole in ground that need not trip out and annotate poly-device.
technical solution of the present invention is: it comprises annotates poly-device body and throttling fuse, the throttling fuse comprises main body, drag for bar, cam mechanism and fusiformis bar, the below of dragging for bar is provided with the upper end and drags for bar lower end axial sliding fit and can be with the core bar that drags for bar and rotate, the below of upper main body is provided with and is sleeved on core bar and is inserted in the fusiformis bar, the adapter sleeve that upper end and upper main body are connected by screw thread, nut on core bar is installed in the fusiformis bar by thread set, the barrel that adapter sleeve is positioned at the fusiformis bar is provided with axial cylindrical void, the outer wall of nut is provided with the slide block of cylindrical void slip vertically, annotate inlet opening that poly-device body main body wall axial throttling fuse hole is connected with the main center hole and with the fluid hole of main body exterior between the part inwall be the fusiformis hole of matching with throttling fuse fusiformis bar outer wall, the fusiformis hole is the reducing hole of being contacted mutually and being consisted of by the little cone cylindrical hole in aperture, large bottom, aperture, multistage top.
Technique effect of the present invention is: the throttling fuse need not be tripped out ground during use and change, can directly directly regulate with instrument convection current amount, pressure drop in the down-hole, thereby make the poly-work of notes realize the casting and dragging free operation, manpower and materials and time have been saved greatly, and improved and annotated poly-accuracy and reliability, indirectly reduce cost for oil production, improved oil recovery efficiency.This casting and dragging free is annotated poly-device can not affect the change of other interval running parameter when single interval is regulated and controled, make regulation and control work become simple and reliable, can realize transferring with pacing, uses more conveniently, and whole to survey accent efficient higher.
Description of drawings
Fig. 1 is that embodiment of the present invention casting and dragging free is annotated the poly-axial sectional view of device;
Fig. 2 is the axial sectional view of embodiment of the present invention throttling fuse.
The specific embodiment
casting and dragging free is annotated poly-device, as Fig. 1, shown in Figure 2, it comprises annotates poly-device body 1 and throttling fuse 2, throttling fuse 2 comprises main body 21, drag for bar 22, cam mechanism 23 and fusiformis bar 24, the below of dragging for bar 22 is provided with the upper end and drags for bar 22 lower end axial sliding fits and can be with the core bar 25 that drags for bar 22 and rotate, the below of upper main body 21 is provided with and is sleeved on core bar 25 and is inserted in fusiformis bar 24, the adapter sleeve 26 that upper end and upper main body 21 are connected by screw thread, the nut 27 on core bar 25 by thread set is installed in fusiformis bar 24, the barrel that adapter sleeve 26 is positioned at fusiformis bar 24 is provided with axial cylindrical void 28, the outer wall of nut 27 is provided with the slide block of cylindrical void 28 slips vertically, annotate poly-device body 1 main body 11 side-wall shafts to the inlet opening 31 that is connected with main body 11 centre bores of throttling fuse hole 3 and with the fluid hole 32 of main body 11 exterior between the part inwall be the fusiformis hole of matching with throttling fuse fusiformis bar 24 outer walls, the fusiformis hole is the reducing hole of being contacted mutually and being consisted of by the little cone cylindrical hole in aperture, large bottom, aperture, multistage top.
Annotating poly-device body 1 main body 11 sidewalls is provided with the throttling fuse hole 3 inlet opening 31 top main body 11 upper and lower mouths of center bore inner walls that are opened on suitable for reading and is positioned at the same pacing balancing hole 4 of throttling fuse hole 3 inlet opening 32 lower opening on main body 11 lower surfaces.
The fusiformis hole is to be made of the little lining 5 in aperture, large bottom, aperture, a plurality of top that is fitted in turn in main body 11 throttling fuse hole 3 straight holes.
annotate poly-device body 1 and include main body 11, top connection 12, upper centralizer body 13, upper joint sleeve 14, lower centralizer body 15, upper guide way 16, lower joint sleeve 17, support 18, lower guide way 19 and lower contact 20, the lower end of top connection 12 is connected with upper joint sleeve 14 upper ends by screw thread, the upper end of main body 11 is connected with upper joint sleeve 14 lower ends by screw thread, the upper end of upper centralizer body 13 is sleeved in the end opening of top connection 12, the lower end be connected with lower centralizer body 15 upper ends by bolt, the upper end phase clamping of the lower end of lower centralizer body 15 and main body 11, upper guide way 16 is arranged in lower centralizer body 15 by bolt, the upper end of lower joint sleeve 17 is connected with main body 11 lower ends by screw thread, the lower end is connected with lower contact 20 by screw thread, the upper end of support 18 is sleeved in main body 11 end openings, the lower end is sleeved in lower contact 20, lower guide way 19 is arranged in support 18 by bolt.
The upper end of fusiformis bar 24 is threaded connection the pressure cap 29 that is sleeved on adapter sleeve 26, and nut 27 is arranged in pressure cap 29, and the upper end of fusiformis bar 24 bodies is provided with the slide block draw-in groove 30 that matches with slide block on nut 27.
Be provided with in the upper end of adapter sleeve 26 and be sleeved on core bar 25 upper and lower ends tops and be pressed in upper spacer 33 on nut 27 upper surfaces, the outer shroud decometer of upper spacer 33 upper ends is above adapter sleeve 26 inner faces, upper spacer 33 tops are provided with the compression spring 34 that is sleeved on core bar 25, and the upper and lower end top, outer shroud platform lower surface that the top, upper end of compression spring 34 is pressed on core bar 25 is pressed on the upper surface of spacer 33.The lower end of core bar 25 by screw thread and radially bearing pin 35 lower nut 36 is installed, lower nut 36 is positioned at the outer wall of fusiformis bar 24, lower nut 36 and the inwall of fusiformis bar 24 is slidably matched, lower nut 36 tops are provided with and are positioned at fusiformis bar 24 and are sleeved on lower stage clip 37 on core bar 25, the top of lower stage clip 37 be provided be positioned at fusiformis bar 24, be sleeved on core bar 25, lower spacer 38 that the upper end is inserted into adapter sleeve 26 lower ends, the top, upper end of lower stage clip 37 is pressed on the lower surface of lower spacer 38, the top, upper end is pressed on the upper surface of lower nut 36.Press down nut 27 after the thread segment that the effect of upper spacer 33 and compression spring 34 is nuts 27 from the core bar 25 upwards screws out nut 27 can be screwed on the thread segment of core bar 25 again, the effect of lower spacer 38 and lower stage clip 37 is that after nut 27 screws out downwards from the thread segment on core bar 25, pressure nut 27 can be screwed on the thread segment of core bar 25 nut 27 again.The bottom of fusiformis bar 24 is provided with pilot seal 39, on pilot seal 39 cylindrical outer wall, the two seals circle is installed, and fusiformis bar 24 outer walls of pilot seal 39 top are to the reducing cylindricality that is connected and consists of by the up-thin-low-thick cone cylindrical axes of multistage.
the upper end of upper main body 21 is equipped with plug screw 40 by screw thread, dragging for bar 22 stage casings endwisely slips and is arranged in plug screw 40, hypomere is positioned at main body 21, drag for hypomere that bar 22 is positioned at main body 21 be set be positioned at main body 21 drag for bar cover 41, drag for bar cover 41 and with the outer cover of dragging for bar 22, the positioning sleeve 42 that is arranged in main body 21 is housed, the upper surface of the interior ring platform of positioning sleeve 42 lower ends is stuck in from bottom to top on the lower surface of dragging for bar cover 41 lower ends restriction and drags for bar cover 41 and move down, the outer shroud platform of positioning sleeve 42 upper ends is stuck on the upper surface of main body 21 from the top down, be provided with in plug screw 40 and positioning sleeve 42 to be sleeved on to drag for bar 22 and drag for and drag for bar reseting pressuring spring 43 on bar cover 41, the top, upper end of dragging for bar reseting pressuring spring 43 is pressed on plug screw 40 inner faces, lower end top is pressed on the outer shroud platform upper surface of dragging for bar cover 41 lower ends, drag for dragging for of bar 22 upper ends be provided with between head and plug screw 40 upper surfaces be stuck in drag for and plug screw 40 upper surfaces between square locating piece 44, the side mouth of square locating piece 44 is sleeved on and drags on bar 22 from dragging for bar 22 sidepieces, be arranged on by bearing pin 45 and drag on bar 22.
Cam mechanism 23 is made of cam 46, torsion spring and jointed shaft 47, cam 46 and torsion spring are positioned at and drag for bar 22 belows and radially be hinged on upper main body 21 by jointed shaft 47, it is spacing that cam 46 is dragged for bar 22, drag for bar 22 by on the position-limiting action of cam 46 is removed after carrying, claw on cam 46 freely rotates downwards, and throttling fuse 2 can be gone out from underground fishing.
Operating principle: by instrument, throttling fuse 2 is put into the throttling fuse hole 3 that poly-device body 1 main body 11 is annotated in the down-hole during operation, cam 46 enters the claw on cam 46 after the inner groove in throttling fuse hole 3 and is stuck in the inner groove of annotating poly-device body 1 main body 11 throttling fuse holes 3, throttling fuse 2 is fixed on annotates on poly-device body 1.(when salvaging throttling fuse 2 by bailing bar 22 on instrument, drag for bar 22 up with respect to upper main body 21, dragging for bar 22 lower ends removes the restriction of cam mechanism 23, drive throttling fuses 2 and continue that the claw on cam 46 freely rotates when up downwards dragging for bar 22, the fixation that makes throttling fuse 2 and annotate between poly-device body 1 is removed, and throttling fuse 2 just can be gone out from underground fishing).At first driving square locating piece 44 by downhole tool when throttling fuse 2 uses rotates, square locating piece 44 drives and drags for bar 22, core bar 25 rotates, core bar 25 rotates and makes fusiformis bar 24 down sliding on adapter sleeve 26 by nut 27, the pilot seal of fusiformis bar 24 lower ends 39 slides into downwards in throttling fuse hole 3 straight holes of inlet opening 31 belows, and the sealing ring on pilot seal 39 seals up the throttling fuse hole 3 of inlet opening 31 belows.Can remove like this work that needs before using common throttling fuse to survey to transfer in advance to annotating the throttling fuse hole 3 of throwing the clogging inlet opening of blanking plug 31 belows in poly-device body from, further improve operating efficiency.just can be to the down-hole injection of polymer after the throttling fuse hole 3 of inlet opening 31 belows is sealed up, polymer is by main body 11 centre bores, throttling fuse hole inlet opening 31, gap between throttling fuse hole 3 and fusiformis bar 24, throttling fuse hole 3 fluid holes 32 inject the stratum, adjusting fusiformis bar 24 by instrument this moment makes it in the hole 3 interior axially slips up or down of throttling fuse, the gap of fusiformis bar 24 outer walls and fusiformis hole inwall is changed just can directly be regulated polymer flow rate and pressure drop by throttling fuse 2 in the down-hole, realize casting and dragging free down-hole adjusting, greatly reduced and used the poly-device of common notes to need the repeatedly trouble of pulling throttling fuse, thereby increase substantially operating efficiency, greatly save the activity duration.
The throttling fuse of the poly-device of this notes can need not trip out ground and need not change in the down-hole, can directly use instrument convection current amount in the down-hole, and pressure drop is directly regulated, and has the following advantages:
1, the inwall employing wave fusiformis hole of matching with throttling fuse fusiformis bar 24 in the poly-device throttling fuse of casting and dragging free notes hole 3 moves up and down fusiformis bar 24 by adjustment throttling fuse 2 and makes the space change between throttling fuse hole 3 wave inwalls and fusiformis bar 24 realize Effective Regulation is carried out in flow, pressure drop.
2, annotate poly-device body 1 main body 11 and adopt binary channel dihedral channel designs, like this can be so that when being regulated and controled, single interval do not affect the change of other interval working system, thus make regulation and control work become simple and reliable.

Claims (10)

1. casting and dragging free is annotated poly-device, it comprises annotates poly-device body (1) and throttling fuse (2), it is characterized in that: throttling fuse (2) comprises main body (21), drag for bar (22), cam mechanism (23) and fusiformis bar (24), the below of dragging for bar (22) is provided with the upper end and drags for bar (22) lower end axial sliding fit and can be with the core bar (25) that drags for bar (22) and rotate, the below of upper main body (21) is provided with and is sleeved on core bar (25) and goes up and be inserted in fusiformis bar (24), the adapter sleeve (26) that upper end and upper main body (21) are connected by screw thread, the nut (27) on core bar (25) by thread set is installed in fusiformis bar (24), the barrel that adapter sleeve (26) is positioned at fusiformis bar (24) is provided with axial cylindrical void (28), the outer wall of nut (27) is provided with the slide block of cylindrical void (28) slip vertically, annotate poly-device body (1) main body (11) side-wall shaft to the inlet opening (31) that is connected with main body (11) centre bore of throttling fuse hole (3) and with the fluid hole (32) of main body (11) exterior between the part inwall be the fusiformis hole of matching with throttling fuse fusiformis bar (24) outer wall, the fusiformis hole is the reducing hole of being contacted mutually and being consisted of by the little cone cylindrical hole in aperture, large bottom, aperture, multistage top.
2. casting and dragging free as claimed in claim 1 is annotated poly-device, it is characterized in that poly-device body (1) main body (11) sidewall of described notes is provided with the upper and lower mouth of throttling fuse hole (3) inlet opening (31) top main body (11) center bore inner wall that is opened on suitable for reading and is positioned at the same pacing balancing hole (4) of throttling fuse hole (3) inlet opening (32) lower opening on main body (11) lower surface.
3. casting and dragging free as claimed in claim 1 is annotated poly-device, it is characterized in that described fusiformis hole is to be made of the little lining (5) in aperture, large bottom, aperture, a plurality of top that is fitted in turn in the straight hole of main body (11) throttling fuse hole (3).
4. casting and dragging free as claimed in claim 1 is annotated poly-device, it is characterized in that the poly-device body (1) of described notes includes main body (11), top connection (12), upper centralizer body (13), upper joint sleeve (14), lower centralizer body (15), upper guide way (16), lower joint sleeve (17), support (18), lower guide way (19) and lower contact (20), the lower end of top connection (12) is connected with upper joint sleeve (14) upper end by screw thread, the upper end of main body (11) is connected with upper joint sleeve (14) lower end by screw thread, the upper end of upper centralizer body (13) is sleeved in the end opening of top connection (12), the lower end be connected with lower centralizer body (15) upper end by bolt, the upper end phase clamping of the lower end of lower centralizer body (15) and main body (11), upper guide way (16) is arranged in lower centralizer body (15) by bolt, the upper end of lower joint sleeve (17) is connected with main body (11) lower end by screw thread, the lower end is connected with lower contact (20) by screw thread, the upper end of support (18) is sleeved in main body (11) end opening, the lower end is sleeved in lower contact (20), lower guide way (19) is arranged in support (18) by bolt.
5. casting and dragging free as claimed in claim 1 is annotated poly-device, the upper end that it is characterized in that described fusiformis bar (24) is threaded connection the pressure cap (29) that is sleeved on adapter sleeve (26), nut (27) is arranged in pressure cap (29), and the upper end of fusiformis bar (24) body is provided with the slide block draw-in groove (30) that matches with slide block on nut (27).
6. casting and dragging free as claimed in claim 5 is annotated poly-device, it is characterized in that being provided with in the upper end of described adapter sleeve (26) and be sleeved on core bar (25) upper and lower end top and be pressed in upper spacer (33) on nut (27) upper surface, the outer shroud decometer of upper spacer (33) upper end is in the top of adapter sleeve (26) inner face, upper spacer (33) top is provided with the compression spring (34) that is sleeved on core bar (25), and the upper and lower end top, outer shroud platform lower surface that the top, upper end of compression spring (34) is pressed on core bar (25) is pressed on the upper surface of spacer (33).
7. casting and dragging free as claimed in claim 5 is annotated poly-device, the lower end that it is characterized in that described core bar (25) by screw thread and radially bearing pin (35) lower nut (36) is installed, lower nut (36) is positioned at fusiformis bar (24), the inwall of the outer wall of lower nut (36) and fusiformis bar (24) is slidably matched, lower nut (36) top is provided with and is positioned at fusiformis bar (24) and is sleeved on lower stage clip (37) on core bar (25), the top of lower stage clip (37) is provided with and is positioned at fusiformis bar (24), be sleeved on core bar (25), the upper end is inserted into the lower spacer (38) in adapter sleeve (26) lower end, the top, upper end of lower stage clip (37) is pressed on the lower surface of lower spacer (38), the top, upper end is pressed on the upper surface of lower nut (36).
8. casting and dragging free as claimed in claim 1 is annotated poly-device, the bottom that it is characterized in that described fusiformis bar (24) is provided with pilot seal head (39), on pilot seal head (39) cylindrical outer wall, the two seals circle is installed, fusiformis bar (24) outer wall of pilot seal head (39) top is to the reducing cylindricality that is connected and consists of by the up-thin-low-thick cone cylindrical axes of multistage.
9. casting and dragging free as claimed in claim 1 is annotated poly-device, the upper end that it is characterized in that described upper main body (21) is equipped with plug screw (40) by screw thread, dragging for bar (22) stage casing endwisely slips and is arranged in plug screw (40), hypomere is positioned at main body (21), drag for hypomere that bar (22) is positioned at main body (21) be set be positioned at main body (21) drag for bar cover (41), the outer cover of dragging for bar cover (41) and dragging for bar (22) is equipped with the positioning sleeve (42) that is arranged in main body (21), the upper surface of the interior ring platform of positioning sleeve (42) lower end is stuck in from bottom to top on the lower surface of dragging for bar cover (41) lower end restriction and drags for bar cover (41) and move down, the outer shroud platform of positioning sleeve (42) upper end is stuck on the upper surface of main body (21) from the top down, be provided with in plug screw (40) and positioning sleeve (42) to be sleeved on to drag for bar (22) and drag for and drag for bar reseting pressuring spring (43) on bar cover (41), the top, upper end of dragging for bar reseting pressuring spring (43) is pressed on plug screw (40) inner face, lower end top is pressed on the outer shroud platform upper surface of dragging for bar cover (41) lower end, drag for dragging for of bar (22) upper end be provided with between head and plug screw (40) upper surface be stuck in drag for and plug screw (40) upper surface between square locating piece (44), the side mouth of square locating piece (44) is sleeved on and drags on bar (22) from dragging for bar (22) sidepiece, be arranged on by bearing pin (45) and drag on bar (22).
10. casting and dragging free as claimed in claim 1 is annotated poly-device, it is characterized in that described cam mechanism (23) is made of cam (46), torsion spring and jointed shaft (47), cam (46) and torsion spring radially are hinged on upper main body (21) by jointed shaft (47) below being positioned at and dragging for bar (22).
CN201310061493.5A 2013-02-27 2013-02-27 Polymer injection device free from dropping and fishing Active CN103089222B (en)

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Application Number Priority Date Filing Date Title
CN201310061493.5A CN103089222B (en) 2013-02-27 2013-02-27 Polymer injection device free from dropping and fishing

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CN103089222B CN103089222B (en) 2015-04-22

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN108019193A (en) * 2016-11-02 2018-05-11 中国石油化工股份有限公司 Hollow survey adjusts one to note poly- device
CN108179992A (en) * 2016-12-08 2018-06-19 中国石油天然气股份有限公司 Adjustable throttling core and polymer distribution device
CN114439416A (en) * 2020-11-05 2022-05-06 中国石油化工股份有限公司 Preset underground throttle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510993A (en) * 1982-03-25 1985-04-16 Marathon Oil Company Flow control apparatus and method
CN1598242A (en) * 2004-07-28 2005-03-23 大庆油田有限责任公司 Apparatus for controlling polymer molecular weight and flow of multiple-layer separate filling into with polymer displacement
CN2861479Y (en) * 2005-11-24 2007-01-24 大庆油田有限责任公司 Polymer eccentric injection allocator with shuttle bar
CN102536181A (en) * 2012-02-10 2012-07-04 哈尔滨工业大学 Adjustable eccentric injection allocation device for polymer injection well

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510993A (en) * 1982-03-25 1985-04-16 Marathon Oil Company Flow control apparatus and method
CN1598242A (en) * 2004-07-28 2005-03-23 大庆油田有限责任公司 Apparatus for controlling polymer molecular weight and flow of multiple-layer separate filling into with polymer displacement
CN2861479Y (en) * 2005-11-24 2007-01-24 大庆油田有限责任公司 Polymer eccentric injection allocator with shuttle bar
CN102536181A (en) * 2012-02-10 2012-07-04 哈尔滨工业大学 Adjustable eccentric injection allocation device for polymer injection well

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108019193A (en) * 2016-11-02 2018-05-11 中国石油化工股份有限公司 Hollow survey adjusts one to note poly- device
CN108019193B (en) * 2016-11-02 2023-09-05 中国石油化工股份有限公司 Hollow measuring and adjusting integrated polymer injection device
CN108179992A (en) * 2016-12-08 2018-06-19 中国石油天然气股份有限公司 Adjustable throttling core and polymer distribution device
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
CN114439416A (en) * 2020-11-05 2022-05-06 中国石油化工股份有限公司 Preset underground throttle

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Effective date of registration: 20200731

Address after: 157000 Heilongjiang District, Mudanjiang City, Dongan Province East seven road Xin'an Street Woodworking Machinery Factory

Patentee after: Mudanjiang Jinheng Petroleum Machinery Technology Co.,Ltd.

Address before: 157000 No. 308 peony street, Xi'an District, Heilongjiang, Mudanjiang

Patentee before: Ma Zhongyuan