CN105156061B - A kind of underground washing well water filling intubation seal device - Google Patents

A kind of underground washing well water filling intubation seal device Download PDF

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Publication number
CN105156061B
CN105156061B CN201510615672.8A CN201510615672A CN105156061B CN 105156061 B CN105156061 B CN 105156061B CN 201510615672 A CN201510615672 A CN 201510615672A CN 105156061 B CN105156061 B CN 105156061B
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China
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sheath
main body
body joint
internal diameter
lower contact
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CN105156061A (en
Inventor
王薇
姚斌
巨亚锋
王守虎
王俊涛
申晓莉
何汝贤
胡改星
王晓娥
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China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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Abstract

The invention belongs to separated-zone water infection oil field development technique field, it is related to a kind of underground washing well water filling intubation seal device, main body joint, sheath and lower contact including tubulose, sheath and the internal diameter of lower contact are equal, the internal diameter of the main body joint of tubulose is gradual change shape, become larger by lower and upper internal diameter, and its minimum diameter is equal to sheath and the internal diameter of lower contact;The mounting hole for penetrating tube wall is additionally provided with the tube wall of main body joint, the mounting hole is built with ball-and-seat, so that main body joint by outside tube wall to tube wall inside one-way conduction, this underground washing well water filling intubation seal device is while can meet to dispense the dispensing intubation sealing of well concentric double pipe, can also effectively solve the two-tube dispensing sealing mechanism of conventional concentric causes to be intubated easy fouling and junk deposition at sealing because can not carry out self-cleaning, the problem of final intubation seal fails, the sealing reliability of enhancing intubation seal, improve concentric double pipe dispensing job success ratio, realize the Efficient Development effect of oil field dispensing well.

Description

A kind of underground washing well water filling intubation seal device
Technical field
The invention belongs to separated-zone water infection oil field development technique field, and in particular to a kind of underground washing well water filling intubation sealing Device.
Background technology
Changqing oilfields recovered water water quality inferiority, corrosivity are strong at present, cause recovered water dispensing well to survey tune and are hampered rate height;It is simultaneously existing There is zonal injection technology to need to carry out survey tune, its is costly and can not reflect water injection well water filling dynamic in real time.
A kind of concentric double pipe dispensing technology is have studied for this, has evaded the problem of downhole measurement adjusting is hampered, realizes dispensing Jing Jing The transformation that tune is surveyed on ground automatically is transferred in lower survey, further improves zonal injection technology technological system.But the technology exist sealing mechanism without Method carries out self-cleaning, and water injection well water injection time is long, in addition recovered water water quality inferiority, is intubated easy fouling and junk deposition at sealing, Do not clean for a long time, cause seal blow-by, seal failure, the final concentric double pipe that influences dispenses effect.
The content of the invention
The problem of can not carrying out self-cleaning present invention aim to address the two-tube dispensing sealing mechanism of conventional concentric, enhancing is inserted The sealing reliability of seals, improve concentric double pipe dispensing success rate.
Therefore, the invention provides a kind of underground washing well water filling intubation seal device, including be sequentially connected with from top to bottom Tubulose main body joint, sheath and lower contact, the sheath of described tubulose and the internal diameter of lower contact are equal, described tubulose The internal diameter of main body joint is gradual change shape, is become larger by lower and upper internal diameter, and its minimum diameter is equal to the interior of sheath and lower contact Footpath;The mounting hole for penetrating tube wall is additionally provided with the tube wall of described main body joint, the mounting hole is built with ball-and-seat so that main body Joint is by tube wall outside to one-way conduction inside tube wall.
Described main body inner nosepiece wall be by it is lower and on annular step it is trapezoidal, the cascade ring internal diameter of foot be equal to sheath and The internal diameter of lower contact.
The described inner wall lower of main body joint and the upper inside wall of lower contact is provided with dust ring, described sheath Upper inside wall and bottom are mounted on sealing gasket.
Described sealing gasket position V-type combination sealing pad, the V-type mouth of the V-type combination sealing pad of the upper inside wall of sheath upward, The V-type mouth down of the V-type combination sealing pad of the inner wall lower of sheath.
The lower end of the sheath of described tubulose and upper end are equipped with female thread into interior connecting portion, under described main body joint End and lower contact upper end are equipped with external screw thread, and main body joint lower end and lower contact upper end are connected through a screw thread above and below sheath respectively End, and run through in screw connection point with connecting pin and fixed.
Beneficial effects of the present invention:This underground washing well water filling intubation seal device of the present invention can meet to dispense well While concentric double pipe dispensing intubation sealing, can also effectively solve the two-tube dispensing sealing mechanism of conventional concentric because that can not carry out certainly Clean and cause to be intubated easy fouling and junk deposition at sealing, final the problem of being intubated seal fails, enhancing intubation seal Sealing reliability, improve concentric double pipe dispensing job success ratio, realize oil field dispensing well Efficient Development effect.
Brief description of the drawings
The present invention is described in further details below with reference to accompanying drawing.
Fig. 1 is the structural representation of underground washing well water filling intubation seal device.
Fig. 2 is operating diagram of the underground washing well water filling intubation seal device in process pipe string.
Description of reference numerals:1st, main body joint;2nd, ball-and-seat;3rd, dust ring;4th, sheath;5th, sealing gasket;6th, connecting pin; 7th, lower contact;8th, outer layer oil pipe;9th, level pressure distributor;10th, intubation seal device;11st, screen casing;12nd, plug;13rd, backwashing wells Plugging device;14th, internal layer oil pipe;15th, it is intubated.
Embodiment
Embodiment 1:
The present embodiment provides a kind of underground washing well water filling intubation seal device, as shown in figure 1, including from top to bottom sequentially Main body joint 1, sheath 4 and the lower contact 7 of the tubulose of connection, the sheath 4 of described tubulose is equal with the internal diameter of lower contact 7, institute The internal diameter of the main body joint 1 for the tubulose stated is gradual change shape, is become larger by lower and upper internal diameter, and its minimum diameter is equal to sheath 4 With the internal diameter of lower contact 7;Be additionally provided with the mounting hole for penetrating tube wall on the tube wall of described main body joint 1, the mounting hole built with Ball-and-seat 2 so that main body joint 1 is by tube wall outside to one-way conduction inside tube wall.
This underground washing well water filling intubation seal device of the present embodiment, it can be used in anti-flushing well operation, its is specific Constructing operation mode is first according to connection tubing string, outer oil shown in Fig. 2 as shown in Fig. 2 Fig. 2 is the mode of concentric double pipe dispensing Level pressure distributor 9 and this intubation seal device 10 of the present invention, the lower end of outer layer oil pipe 8 connection screen casing are connected on the tubing string of pipe 8 11 and plug 12, there are two sections of backwashing wells plugging devices 13 outside outer layer oil pipe 8, the position of level pressure distributor 9 is in two sections of backwashing wells Between plugging device 13;There is internal layer oil pipe 14 in outer layer oil pipe 8, the intubation 15 of the bottom of internal layer oil pipe 14 passes through intubation seal device 10, the wherein external diameter of internal layer oil pipe 14 is equal to the internal diameter of intubation seal device 10, i.e., equal to sheath 4 and the internal diameter of lower contact 7.
When anti-flushing well, base sealed packer is suppressed first, tests envelope injection test;Then flushing fluid is downward by casing annulus, warp Continue downwards after crossing the well-flushing passage of backwashing wells plugging device 13.
The four way valve of two layers of oil pipe annular space upper end inside and outside closing, proceed by the washing and cleaning operation of internal layer oil pipe 14, well-flushing Liquid is entered inside oil pipe by screen casing 11, and because the lower end of this intubation seal device 10 of the present invention seals, now detergent remover is by inserting The lower end of pipe 15, which enters, continues upwardly into internal layer oil pipe 14, and washing and cleaning operation is carried out to internal layer oil pipe 14, by internal layer oil after having cleaned The upper end of pipe 14 returns to ground.In the presence of the four way valve of inside and outside two layers of oil pipe annular space upper end is closed, entered by level pressure distributor 9 The route for entering inside and outside two layers of oil pipe annular space cleaning annular space is obstructed;
The four way valve of the upper end of internal layer oil pipe 14 is closed, proceeds by the washing and cleaning operation of inside and outside two layers of oil pipe annular space, well-flushing Liquid by level pressure distributor 9 enter inside and outside two layers of oil pipe annular space, carry out washing and cleaning operation, ground is returned to by upper end after the completion of cleaning. In the presence of the four way valve of the upper end of internal layer oil pipe 14 is closed, entered by screen casing 11 inside oil pipe, and then enter internal layer oil pipe This route of 14 cleanings is obstructed.
Inside and outside the cleaning in the washing and cleaning operation of two layers of oil pipe annular space, due to the presence of ball-and-seat 2 in intubation seal device 10, The flushing fluid of casing annulus can also be entered in intubation seal device 10 by ball-and-seat 2, because the internal diameter of main body joint 1 is gradual change Shape, so ensure that the unimpeded of route, the fouling at the sealing of intubation seal device 10 and deposition junk can thus be carried out Cleaning, as the flushing fluid of inside and outside two layers of oil pipe annular space finally flows out ground.
Embodiment 2:
On the basis of embodiment 1, the present embodiment is further illustrated, and in the present embodiment, the inwall of main body joint 1 is served as reasons It is lower and on annular step it is trapezoidal, the cascade ring internal diameter of foot is equal to sheath 4 and the internal diameter of lower contact 7.The trapezoidal shape of annular step Shape so that the inwall of main body joint 1 does not contact with each other with intubation 15, is thus filled for flushing fluid by ball-and-seat 2 to intubation sealing Put the fouling at 10 sealing and deposition junk is cleaned, there is provided condition and space.
In order to ensure the sealing of single unit system, in the present embodiment, the inner wall lower of main body joint 1 and the inwall of lower contact 7 Top is provided with dust ring 3, and the upper inside wall of described sheath 4 and bottom are mounted on sealing gasket 5,5 V-type groups of sealing gasket Sealing gasket is closed, upward, the V-type combination of the inner wall lower of sheath 4 is close for the V-type mouth of the V-type combination sealing pad of the upper inside wall of sheath 4 The V-type mouth down of packing.
In order to ensure the stability of integral sealing means so that connected between its all parts reliably, in the present embodiment, pipe The lower end of the sheath 4 of shape and upper end are equipped with female thread into interior connecting portion, on the described lower end of main body joint 1 and lower contact 7 End is equipped with external screw thread, and the lower end of main body joint 1 and the upper end of lower contact 7 are connected through a screw thread the upper and lower side of sheath 4 respectively, and in screw thread Connecting portion is with connecting pin 6 through fixation.
In summary, this underground washing well water filling intubation seal device of the invention can meet to dispense well concentric double pipe While dispensing intubation sealing, can also effectively solve the two-tube dispensing sealing mechanism of conventional concentric and be led because self-cleaning can not be carried out Easy fouling and junk deposition at intubation sealing are caused, final the problem of being intubated seal fails, the sealing of enhancing intubation seal can By property, concentric double pipe dispensing job success ratio is improved, realizes the Efficient Development effect of oil field dispensing well.
It is exemplified as above be only to the present invention for example, do not form the limitation to protection scope of the present invention, it is all It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.

Claims (3)

1. a kind of underground washing well water filling intubation seal device, including the main body joint (1) for the tubulose being sequentially connected with from top to bottom, Sheath (4) and lower contact (7), it is characterised in that:The sheath (4) of described tubulose and the internal diameter of lower contact (7) are equal, described The internal diameter of the main body joint (1) of tubulose is gradual change shape, is become larger by lower and upper internal diameter, and its minimum diameter is equal to sheath (4) With the internal diameter of lower contact (7);The mounting hole for penetrating tube wall is additionally provided with the tube wall of described main body joint (1), in the mounting hole Equipped with ball-and-seat (2) so that main body joint (1) is by tube wall outside to one-way conduction inside tube wall;
Described main body joint (1) inwall be by it is lower and on annular step it is trapezoidal, the cascade ring internal diameter of foot is equal to sheath (4) With the internal diameter of lower contact (7);
The lower end of the sheath (4) of described tubulose and upper end are equipped with female thread into interior connecting portion, described main body joint (1) Lower end and lower contact (7) upper end are equipped with external screw thread, and main body joint (1) lower end and lower contact (7) upper end are connected by screw thread respectively Sheath (4) upper and lower side is connect, and is run through in screw connection point with connecting pin (6) and fixed.
2. washing well water filling intubation seal device in underground as claimed in claim 1, it is characterised in that:Described main body joint (1) inner wall lower and the upper inside wall of lower contact (7) is provided with dust ring (3), the upper inside wall of described sheath (4) and Bottom is mounted on sealing gasket (5).
3. washing well water filling intubation seal device in underground as claimed in claim 2, it is characterised in that:Described sealing gasket (5) For V-type combination sealing pad, the V-type mouth of the V-type combination sealing pad of the upper inside wall of sheath (4) upward, under the inwall of sheath (4) The V-type mouth down of the V-type combination sealing pad in portion.
CN201510615672.8A 2015-09-25 2015-09-25 A kind of underground washing well water filling intubation seal device Active CN105156061B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109322646B (en) * 2017-07-31 2023-10-31 中国石油天然气股份有限公司 Separate injection pipe column for oil well water injection and use method
CN109267978B (en) * 2018-09-07 2022-03-22 中国石油化工股份有限公司 Separate injection pipe column

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745975A (en) * 1987-03-23 1988-05-24 Larry Ray Price Water well completion apparatus and method of use
CN201924873U (en) * 2010-12-15 2011-08-10 张玉雪 Long-term expanding packer
CN202165041U (en) * 2011-04-17 2012-03-14 孙月东 Plug-in sealing device
CN203469631U (en) * 2013-08-20 2014-03-12 托普威尔石油技术股份公司 Washable well filter and water injection assisting device
CN203867512U (en) * 2014-05-14 2014-10-08 天津市滨海新区龙新石油机械制造有限公司 Hydraulic expansion and self-locking seal type well-flushable packer
CN205025411U (en) * 2015-09-25 2016-02-10 中国石油天然气股份有限公司 But intubate of well -flushing water injection in pit sealing device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110303416A1 (en) * 2010-06-14 2011-12-15 Ii John Wayne Herman Lower emergency marine riser(lemr) and method of installation preventing catastrophic product spills

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4745975A (en) * 1987-03-23 1988-05-24 Larry Ray Price Water well completion apparatus and method of use
CN201924873U (en) * 2010-12-15 2011-08-10 张玉雪 Long-term expanding packer
CN202165041U (en) * 2011-04-17 2012-03-14 孙月东 Plug-in sealing device
CN203469631U (en) * 2013-08-20 2014-03-12 托普威尔石油技术股份公司 Washable well filter and water injection assisting device
CN203867512U (en) * 2014-05-14 2014-10-08 天津市滨海新区龙新石油机械制造有限公司 Hydraulic expansion and self-locking seal type well-flushable packer
CN205025411U (en) * 2015-09-25 2016-02-10 中国石油天然气股份有限公司 But intubate of well -flushing water injection in pit sealing device

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