CN103055549B - Introduction-type down-hole multilevel oily-water seperating equipment bottom one - Google Patents

Introduction-type down-hole multilevel oily-water seperating equipment bottom one Download PDF

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CN103055549B
CN103055549B CN201310024305.1A CN201310024305A CN103055549B CN 103055549 B CN103055549 B CN 103055549B CN 201310024305 A CN201310024305 A CN 201310024305A CN 103055549 B CN103055549 B CN 103055549B
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hole
parallel
channel
location
machined
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CN201310024305.1A
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CN103055549A (en
Inventor
李增亮
董祥伟
孙召成
赵传伟
孟凡林
胥曰强
张琦
冯龙
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中国石油大学(华东)
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Abstract

A kind of bottom introduction-type down-hole multilevel oily-water seperating equipment being applicable to twin packer downhole oil-water separation same well production-injection tubular column structure.It is the suction inlet that bottom using, extraction layer Produced Liquid is incorporated into the double casing electric submersible pump being positioned at device top by incorporation way by the annular section of device and other special flow passage, crude oil liquid returns to carry out in device oil-water separation by pump discharge after electric submersible pump supercharging again, overflowing liquid after separation is immediately discharged to casing annulus, underflow liquid enters in water-filling oil pipe by interpolation pipe, it is to avoid the configuration of bypass pipe.Device comprises four hydrocyclones, is designed by special flow passage structure, it is achieved the connecting mode of series connection after first parallel connection two-by-two, improve separation efficiency and the disposal ability of downhole oil-water separation device.

Description

Introduction-type down-hole multilevel oily-water seperating equipment bottom one
The present invention relates to oilfield exploitation technical field, be a kind of downhole oil-water separation device, especially It it is introduction-type down-hole multilevel oily-water seperating equipment bottom one.
Downhole oil-water separation technology can effectively must solve to bring due to the High water cut of oil well Problems, this technology can be implemented in down-hole and Produced Liquid carried out oil-water separation, will isolate The water that purifies be recycled into the water filling layer of same well, only isolated enriched oil is lifted to ground Face, is an energy-saving and environment-friendly advantage technology.The core component of downhole oil-water separation technology Being hydrocyclone, Separating Performance in Hydrocyclone and disposal ability are downhole oil-water separation technology The key effectively implemented.Traditional downhole oil-water separation device is configured with plural serial stage tandem type Downhole hydraulic cyclone, although the requirement of separation efficiency can be met to a certain extent, but still There is bigger room for promotion, and have to configure bypass pipe for realizing the connecting mode of series connection, This measure makes system reliability be substantially reduced.Feasible solution is to retain former coupled in series side Formula, is re-introduced into multiple small diameter hydraulic cyclone being connected in parallel on the basis of coupled in series Replace former single-stage major diameter hydrocyclone, the connecting mode i.e. using first and going here and there afterwards.Multiple little The single-stage that the separating property of diameter hydrocyclone parallel operation is better than equal disposal ability is big Diameter hydrocyclone.For avoiding the use of bypass pipe, it may be considered that in twin packer downhole oil The drain scheme of introduction-type bottom using on the basis of water separation tubular column structure.
For solving down-hole single-stage or plural serial stage hydrocyclone efficiency is low, bypass pipe poor reliability Problem, the present invention proposes a kind of novel downhole oil-water separation device.This device is configured with Four hydrocyclones, after using first parallel connection, the mode of series connection is divided into two groups, be respectively upper group and Lower group, often group includes two hydrocyclones coupled with parallel way, adopts for upper group and lower group again Couple with series system.Parallel way refers to that liquid stream to be separated simultaneously enters two hydrocyclones Separate;Series system refers to the underflow outlet of group hydrocyclone and lower group of hydraulic cyclone The entrance connection of device, the underflow liquid of upper group enters in lower group and again separates.This device uses crude oil The bottom incorporation way of liquid, the i.e. crude oil liquid of extraction layer are incorporated into this device from the bottom of this device In annular section, after the annular space and other special flow passage of this device, enter into pumping enter Mouthful, the liquid stream after pump supercharging again returns to carry out in this device oil-water separation.
Down-hole multilevel oily-water seperating equipment of the present invention specifically includes that connection double casing electricity is dived Pump Suction Nozzle and the top connection of outlet, with the upper case of top connection formation annular fiowpath, carry There is the cross-channel body upper in parallel of entrance channel, overflow runner and crude oil liquid runner, comprise two The top parallel connection hydrocyclone group of hydrocyclone, hydrocyclone group in parallel with top is formed The middle housing of annular fiowpath, prevents a stay tube of hydrocyclone unstability, fixed support tube Support base, with crude oil liquid runner and the upper positioning seat of center flow channels, with entrance channel, Overflow runner and the cross-channel body lower in parallel of crude oil liquid runner, it is easy to the circumscribed overflow of replacing Oil nozzle, comprises the bottom parallel connection hydrocyclone group of two hydrocyclones, water in parallel with bottom Power a cluster cyclone forms the lower case of annular fiowpath, under band crude oil liquid runner and center flow channels Positioning seat, with the inside and outside spigot joint intubating and cooperatively forming crude oil liquid runner with water filling runner.
The present invention solves that its technical problem the technical scheme is that top connection end face is processed Having central circular flowing hole, connect with the outlet of double casing electric submersible pump, nearly wall is machined with annular Flowing hole, connects with the suction inlet of double casing electric submersible pump.Upper cross-channel body in parallel is in parallel with lower The end face of cross-channel body is machined with hole, two location respectively, and each hydrocyclone positions peace respectively It is loaded in hole, location, with location hole coaxial cooperation form sealing;The inner facing cut in hole, location is put down, For the axial location of hydrocyclone, the inner face after milling is flat is machined with and positions hole concentric Spout hole, the overflow protruded tube coaxial cooperation of spout hole and hydrocyclone also forms sealing; Spout hole connects with casing annulus further through a radial hole, thus by the overflowing liquid of hydrocyclone Causing casing annulus, define overflow runner, radial hole exit is machined with female thread hydraulic fluid port, Being connected with circumscribed overflow oil nozzle, circumscribed overflow oil nozzle is easily changed;Basis in hole, location Upper processing eccentric circular hole, eccentric circular hole is relative to the eccentric axis in hole, location, eccentric circular hole interior End face flushes with the inner face in hole, location, and eccentric circular hole length is less than depth of positioning hole, with waterpower Cyclone inlet size adapts;Eccentric circular hole eccentric direction in two hole, location is relative, chooses Suitably eccentric throw, diameter, it is ensured that two eccentric circular holes can intersect, after intersecting, intersection is produced A raw flow-passing surface, this flow-passing surface area adapts with inflow-rate of water turbine;Upper cross-channel body in parallel and under The other end of cross-channel body in parallel is machined with long flat flowing hole respectively, eccentric through to two Circular hole, thus got through the entrance channel of hydrocyclone group in parallel.Upper cross-channel body in parallel It is machined with straight-through looping pit respectively with at the nearly wall of lower cross-channel body in parallel, is used for getting through crude oil Liquid stream road.Upper positioning seat and lower positioning seat are multidiameter shape, and big axle head end face is machined with two The hole, underflow pipe location of hydrocyclone, little axle head end face is machined with center hole, holes interior End face overlaps and drills through, and center hole aperture is sufficiently large, it is ensured that coincidence face reaches certain crossing and flows Area;Cascaded surface is machined with multiple straight-through circular hole, is used for getting through crude oil liquid runner.Spigot joint Being designed with female thread at two, be used for connecting and inside and outside intubate, extraction layer crude oil liquid is inserted by inside and outside Annular space between pipe enters in spigot joint;It is drilled with looping pit at the nearly wall of spigot joint, Connect the straight-through circular hole of time positioning seat;The straight-through circular hole of lower positioning seat has connected again lower case And the annular space between the hydrocyclone group of bottom, this annular space is further through lower intersection in parallel The nearly wall of runner body lead directly to looping pit connected with the straight-through circular hole of upper positioning seat middle housing and Annular space between the waterpower a cluster cyclone of top, further through the nearly wall of upper cross-channel body in parallel Straight-through looping pit has connected the annular space between upper case and top connection, then by connect The nearly wall circular hole of head has connected the suction inlet of double casing electric submersible pump, thus form extraction layer Crude oil liquid passage.
The invention has the beneficial effects as follows: the parallel connection and serial connection work of multi-stage water power cyclone can be realized Make, improve separation efficiency and disposal ability, coordinate with inversion type electric pump unit possess higher Service behaviour;Overflowing liquid drains into casing annulus, is jointly lifted with oil pipe by oil jacket annular space, keeps away Having exempted from the configuration of bypass pipe, reliability is higher.
The invention has the beneficial effects as follows: the parallel connection and serial connection work of multi-stage water power cyclone can be realized Make, improve separation efficiency and disposal ability, coordinate with inversion type electric pump unit possess higher Service behaviour;Overflowing liquid drains into casing annulus, is jointly lifted with oil pipe by oil jacket annular space, keeps away Having exempted from the configuration of bypass pipe, reliability is higher.
Fig. 1 is apparatus of the present invention structural representations;
Fig. 2 (a) is apparatus of the present invention connections in downhole oil-water separation injection-production system in same well Schematic diagram;
Fig. 2 (b) is apparatus of the present invention local in downhole oil-water separation injection-production system in same well Sectional drawing;
Fig. 2 (c) is apparatus of the present invention local in downhole oil-water separation injection-production system in same well Sectional view;
Fig. 3 is the A-A sectional view in Fig. 1;
Fig. 4 is the B-B sectional view in Fig. 1;
Fig. 5 is the C-C sectional view in Fig. 1;
Fig. 6 is the D-D sectional view in Fig. 1;
Fig. 6 is the D-D sectional view in Fig. 1;
Fig. 7 is the E-E sectional view in Fig. 1;
Fig. 8 is the F-F sectional view in Fig. 1.
In FIG, 1. top connection, 2. upper case, 3. go up cross-channel body in parallel, 4. Circumscribed overflow oil nozzle, 5. top parallel connection hydrocyclone group, 6. middle housing, 7. a stay tube, 8. support base, 9. go up positioning seat, 10. time cross-channel body in parallel, 11. bottom parallel connection waterpower A cluster cyclone, 12. lower cases, 13. times positioning seats, 14. spigot joints, 15,16,17, 18,19,20,21,22,23,24,25,26,27,28.O RunddichtringO.
In fig. 2,29. lifting oil pipes, 30. cables, 31. high-voltage cable joints, 32. latent oil Motor, 33. protectors, 34. double casing electric submersible pumps, 35. interpolation pipes, 36. outer tubes, 37. Insertion type sealing device, 38.Y441 packer, 39. sliding sleeve switches, 40.Y341 packer, 41. water-filling oil pipes.
Fig. 1 is bottom introduction-type down-hole multilevel oily-water seperating equipment structural representation, top connection (1) it is connected with upper cross-channel body (3) in parallel by sealing screw thread, upper case (2) It is positioned between the two and forms coaxial cooperation, after axially blocking, completing location;Middle housing (6) With upper cross-channel body (3) in parallel, lower cross-channel body (10) in parallel by sealing screw thread Connect;It is in parallel with lower that four hydrocyclones are separately mounted to cross-channel body (3) in parallel In the hole, location of cross-channel body (10), respectively with a stay tube (7) and support base (8) Support, complete location with positioning seat (9), lower positioning seat (13);Lower case (12) Use to seal with lower cross-channel body (10) in parallel and threaded, make with spigot joint (14) Threaded with sealing;Circumscribed overflow oil nozzle (4) uses sealing to be threadably mounted at parallel connection The external oil port of cross-channel body (3) and lower cross-channel body (10) in parallel.
Fig. 2 (a) is apparatus of the present invention connections in downhole oil-water separation injection-production system in same well Schematic diagram, Fig. 2 (b) is that apparatus of the present invention are in downhole oil-water separation injection-production system in same well Schematic partial sectional view, Fig. 2 (c) is that apparatus of the present invention are in downhole oil-water separation injection-production system in same well Partial sectional view, electric pump unit use inversion type connected mode, be followed successively by cable from top to bottom (30), high-voltage cable joint (31), submersible electric machine with oil (32), protector (33), double Shell electric submersible pump (34).Top connection (1) is by flange with double casing electric submersible pump (34) even Connect;Interpolation pipe (35) is threadeded by sealing with spigot joint (14), outer tube (36) It is connected by tubing thread with spigot joint (14).
During system worked well, the High water cut fluid of extraction layer is through sliding sleeve switch (39), interpolation The annular space that pipe (35) and outer tube (36) are constituted, enters into spigot joint (14) Crude oil liquid runner, the straight-through circular hole passing upward through lower positioning seat (13) enters back into lower case (12) Annular fiowpath, continue up through lower cross-channel body (10) in parallel straight-through looping pit and The straight-through circular hole of upper positioning seat (9) enters into the annular fiowpath of middle housing (6), then to On enter into upper case (2) through the straight-through looping pit of upper cross-channel body (3) in parallel Annular fiowpath, then enter into double casing electric submersible pump (34) through the looping pit of top connection (1) In carry out supercharging, the crude oil liquid after supercharging is entered into the center of top connection (1) by pump discharge Circular hole, enters into the rotation of top parallel connection waterpower through upper cross-channel body (3) entrance channel in parallel Separating in stream device group (5), the liquid stream after separation is divided into two parts: a part is overflow Mixed liquor, flows through circumscribed overflow oil nozzle (4) and is expelled to oil jacket annular space;Another part is the end Stream mixed liquor, is entered into lower cross-channel body (10) in parallel by the center flow channels of upper positioning seat (9) Entrance channel, separate then in bottom parallel connection hydrocyclone group (11), Liquid stream after separation is also classified into two parts: a part is overflow mixed liquor, by circumscribed oil overflow Mouth (4) is expelled to oil jacket annular space, and the overflowing liquid of hydrocyclone group (5) in parallel with top mixes Close, be jointly lifted to ground by casing annulus and lifting oil pipe (29);Another part is Underflow mixed liquor, by center flow channels and the center of spigot joint (14) of lower positioning seat (13) Runner enters in interpolation pipe (35), enters into water-filling oil pipe (41) through interpolation pipe (35) In, eventually arrive at water filling layer, be injected in stratum.

Claims (3)

1. bottom an introduction-type down-hole multilevel oily-water seperating equipment, including top connection (1), Upper case (2), upper cross-channel body (3) in parallel, circumscribed overflow oil nozzle (4), Top parallel connection hydrocyclone group (5), middle housing (6), a stay tube (7), support Base (8), upper positioning seat (9), lower cross-channel body (10) in parallel, bottom parallel connection water Power a cluster cyclone (11), lower case (12), lower positioning seat (13), spigot joint (14), It is characterized in that: top parallel connection hydrocyclone group (5) includes two hydrocyclones, respectively Location and installation is in the hole, two location of upper cross-channel body (3) in parallel;Bottom parallel connection waterpower A cluster cyclone (11) includes two hydrocyclones, and location and installation is at lower cross-current in parallel respectively In the hole, two location of road body (10);
Upper positioning seat (9) and lower positioning seat (13), in multidiameter shape, are machined with at cascaded surface Straight-through circular hole;Upper positioning seat (9) and lower positioning seat (13) are machined with two cyclone underflows Hole, pipe location, other end is machined with center hole, center hole and hole, two underflow pipe location It is connected.
Bottom the most according to claim 1 introduction-type down-hole multilevel oily-water seperating equipment, its Feature is: upper cross-channel body (3) in parallel and the end face of lower cross-channel body (10) in parallel It is machined with hole, two location respectively, hole, each location is machined with eccentric circular hole, and two off-centre operations Hole is crossed to form a flow-passing surface;Upper cross-channel body (3) in parallel and lower cross-channel body in parallel (10) being machined with spout hole in hole, location, spout hole is by a radial hole with oil jacket annular space even Logical, radial hole export processing has screw thread hydraulic fluid port;Upper cross-channel body (3) in parallel and lower parallel connection The other end of cross-channel body (10) is machined with the flowing hole of a long flat pattern, crosses stream Hole is connected with two eccentric circular holes;Upper cross-channel body (3) in parallel and lower cross-channel in parallel It is machined with straight-through looping pit at the nearly wall of body (10).
Bottom the most according to claim 1 introduction-type down-hole multilevel oily-water seperating equipment, its Feature is: between upper case (2) and top connection (1), middle housing (6) and top Between hydrocyclone group (5) in parallel, lower case (12) hydraulic cyclone in parallel with bottom Annular space is constituted, by upper cross-channel in parallel between each annular space between device group (11) Body (3), upper positioning seat (9), the clear opening of lower cross-channel body (10) in parallel are connected mutually Logical.
CN201310024305.1A 2013-01-23 2013-01-23 Introduction-type down-hole multilevel oily-water seperating equipment bottom one CN103055549B (en)

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CN103835693A (en) * 2014-03-27 2014-06-04 中国石油大学(华东) Instability prevention fine separation series type hydraulic cyclone oil-water separator
CN103835694B (en) * 2014-03-27 2017-02-15 中国石油大学(华东) Marine large-flow downhole oil-water separator with parallel type whirlcones
CN105435489B (en) * 2015-11-10 2019-05-14 中国石油大学(华东) The vertical oily-water seperating equipment of swirl reinforced with microchannel and method
CN106178605B (en) * 2016-08-31 2018-04-20 吉林省万新科技有限公司 A kind of special spiral type oil water separation device in kitchen
US10337312B2 (en) * 2017-01-11 2019-07-02 Saudi Arabian Oil Company Electrical submersible pumping system with separator
CN106837291B (en) * 2017-02-17 2019-06-25 中国石油大学(华东) Oil jacket annulus gas-liquid separation device in non-conventional gas well head
CN107473329B (en) * 2017-10-12 2020-08-14 大庆油田有限责任公司 Underground three-stage cyclone separation device

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