CN105156061A - Underground washable well water injection inserting pipe sealing device - Google Patents
Underground washable well water injection inserting pipe sealing device Download PDFInfo
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- CN105156061A CN105156061A CN201510615672.8A CN201510615672A CN105156061A CN 105156061 A CN105156061 A CN 105156061A CN 201510615672 A CN201510615672 A CN 201510615672A CN 105156061 A CN105156061 A CN 105156061A
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- body joint
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Abstract
The invention belongs to the technical field of oil field separated layer water injection development and relates to an underground washable well water injection inserting pipe sealing device comprising a tubular main joint, a sheath and a lower joint, wherein the internal diameters of the sheath and the lower joint are equal, the internal diameter of the tubular main joint is gradient and is gradually increased from the lower part to the upper part, and the minimum internal diameter of the tubular main joint is equal to the internal diameters of the sheath and the lower joint; and a mounting hole penetrating through the tubular wall is also formed in the tubular wall of the main joint and is internally provided with a check valve for realizing one-way communication of the outside and the inside of the tubular wall of the main joint. By using the underground washable well water injection inserting pipe sealing device, the requirement for sealing concentric double-pipe separate injection inserting pipes of a separate injection well can be met, meanwhile, the problem of inserting pipe sealing element failure caused by scale formation and fallen object deposition easily generated at the sealed parts of inserting pipes because the conventional concentric double-pipe separate injection sealing mechanism cannot be self-washed is effectively solved, the sealing reliability of an inserting pipe sealing element can be improved, the success rate of separate injection operation of double concentric pipes can be increased, and the efficient developing effect of a separate injection well for an oil field can be achieved.
Description
Technical field
The invention belongs to separated-zone water infection oil field development technique field, be specifically related to a kind of down-hole washing well water filling intubation seal device.
Background technology
Current Changqing oilfields recovered water water quality inferiority, corrosivity are strong, cause recovered water dispensing well surveying to adjust the rate that is hampered high; Simultaneously existing zonal injection technology needs to carry out surveys tune, and it costly and cannot reflect that water injection well water filling is dynamic in real time.
Have studied a kind of concentric double pipe dispensing technology for this reason, evaded the problem that downhole measurement adjusting is hampered, realize dispensing well downhole measurement adjusting surveys tune automatically transformation to ground, improve zonal injection technology technological system further.But this technology exists sealing mechanism cannot carry out self-cleaning, and water injection well water injection time is of a specified duration, in addition recovered water water quality inferiority, the easy fouling of intubate sealing place and junk deposition, do not clean for a long time, cause seal blow-by, seal failure, finally affects concentric double pipe dispensing effect.
Summary of the invention
The object of the invention is to solve the problem that the two-tube dispensing sealing mechanism of conventional concentric cannot carry out self-cleaning, strengthen the sealing reliability of intubate seal, improve concentric double pipe dispensing success rate.
For this reason, the invention provides a kind of down-hole washing well water filling intubation seal device, comprise the main body joint of the tubulose connected in turn from top to bottom, sheath and lower contact, the sheath of described tubulose is equal with the internal diameter of lower contact, the internal diameter of the main body joint of described tubulose is gradual change shape, become large gradually by lower and upper internal diameter, and its minimum diameter equals the internal diameter of sheath and lower contact; The tube wall of described main body joint is also provided with the installing hole penetrating tube wall, and this installing hole, built with ball-and-seat, makes main body joint by tube wall outward to the inner one-way conduction of tube wall.
Described main body inner nosepiece wall be by lower and on annular stepped shape, the cascade ring internal diameter of foot equals the internal diameter of sheath and lower contact.
The described inner wall lower of main body joint and the upper inside wall of lower contact are provided with dust ring, and upper inside wall and the bottom of described sheath are all provided with sealing mat.
Described sealing mat 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 internal thread and form interior connecting portion, described main body joint lower end and lower contact upper end are equipped with external screw thread, main body joint lower end and lower contact upper end respectively by the sheath upper and lower side that is threaded, and run through fixing at screw connection point with connecting pin.
Beneficial effect of the present invention: this down-hole washing well water filling intubation seal device of the present invention is while meeting the sealing of dispensing well concentric double pipe dispensing intubate, effectively can also solve the two-tube dispensing sealing mechanism of conventional concentric and cause the easy fouling of intubate sealing place and junk deposition because cannot self-cleaning be carried out, the problem of final intubate seal fails, strengthen the sealing reliability of intubate seal, improve concentric double pipe dispensing job success ratio, realize the Efficient Development effect of oil field dispensing well.
Accompanying drawing explanation
Below with reference to accompanying drawing, the present invention is described in further details.
Fig. 1 is the structural representation of down-hole washing well water filling intubation seal device.
Fig. 2 is the operating diagram of washing well water filling intubation seal device in down-hole in process pipe string.
Description of reference numerals: 1, main body joint; 2, ball-and-seat; 3, dust ring; 4, sheath; 5, sealing mat; 6, pin is connected; 7, lower contact; 8, outer oil pipe; 9, level pressure distributor; 10, intubation seal device; 11, screen casing; 12, plug; 13, backwashing wells plugging device; 14, internal layer oil pipe; 15, intubate.
Detailed description of the invention
Embodiment 1:
The present embodiment provides a kind of down-hole washing well water filling intubation seal device, as shown in Figure 1, comprise the main body joint 1 of the tubulose connected in turn from top to bottom, sheath 4 and lower contact 7, the sheath 4 of described tubulose is equal with the internal diameter of lower contact 7, the internal diameter of the main body joint 1 of described tubulose is gradual change shape, become large gradually by lower and upper internal diameter, and its minimum diameter equals the internal diameter of sheath 4 and lower contact 7; The tube wall of described main body joint 1 is also provided with the installing hole penetrating tube wall, and this installing hole, built with ball-and-seat 2, makes main body joint 1 by tube wall outward to the inner one-way conduction of tube wall.
This down-hole washing well water filling intubation seal device of the present embodiment, can be used in anti-flushing well operation, its concrete constructing operation mode as shown in Figure 2, Fig. 2 is the mode of concentric double pipe dispensing, first tubing string is connected according to shown in Fig. 2, outer oil pipe 8 tubing string is connected to level pressure distributor 9 and this intubation seal device 10 of the present invention, outer oil pipe 8 lower end connects screen casing 11 and plug 12, have two sections of backwashing wells plugging devices 13 outside outer oil pipe 8, the position of level pressure distributor 9 is between two sections of backwashing wells plugging devices 13; Have internal layer oil pipe 14 in outer oil pipe 8, the intubate 15 of internal layer oil pipe 14 bottom is through intubation seal device 10, and wherein the external diameter of internal layer oil pipe 14 equals the internal diameter of intubation seal device 10, namely equals the internal diameter of sheath 4 and lower contact 7.
When anti-flushing well, first suppress base sealed packer, test envelope injection test; Then flushing fluid is downward by casing annulus, continues downwards after backwashing wells plugging device 13 well-flushing passage.
Close the four way valve of inside and outside two-layer oil pipe annular space upper end, start the washing and cleaning operation carrying out internal layer oil pipe 14, flushing fluid enters oil pipe inside by screen casing 11, due to this intubation seal device 10 lower end sealing of the present invention, now detergent remover enters continuation by intubate 15 lower end and upwards enters internal layer oil pipe 14, washing and cleaning operation is carried out to internal layer oil pipe 14, after having cleaned, returns to ground by internal layer oil pipe 14 upper end.Under the effect that four way valve in inside and outside two-layer oil pipe annular space upper end is closed, the route being entered inside and outside two-layer oil pipe annular space cleaning annular space by level pressure distributor 9 is obstructed;
Close the four way valve of internal layer oil pipe 14 upper end, start the washing and cleaning operation carrying out inside and outside two-layer oil pipe annular space, flushing fluid enters inside and outside two-layer oil pipe annular space by level pressure distributor 9, carries out washing and cleaning operation, turns back to ground after having cleaned by upper end.Under the effect that four way valve in internal layer oil pipe 14 upper end is closed, enter oil pipe inside by screen casing 11, and then this route entering internal layer oil pipe 14 cleaning is obstructed.
In the washing and cleaning operation of the inside and outside two-layer oil pipe annular space of cleaning, due to the existence of ball-and-seat 2 in intubation seal device 10, the flushing fluid of casing annulus also enters in intubation seal device 10 by ball-and-seat 2, internal diameter due to main body joint 1 is gradual change shape, so ensure that the unimpeded of route, so just the fouling of sealing place of intubation seal device 10 and deposition junk can be cleaned, along with the flushing fluid of inside and outside two-layer oil pipe annular space finally flows out ground.
Embodiment 2:
On the basis of embodiment 1, the present embodiment is described further, in the present embodiment, main body joint 1 inwall be by lower and on annular stepped shape, the cascade ring internal diameter of foot equals the internal diameter of sheath 4 and lower contact 7.The shape of annular stepped shape, makes main body joint 1 inwall and intubate 15 not contact with each other, and like this with regard to being cleaned by the fouling of sealing place of ball-and-seat 2 pairs of intubation seal devices 10 and deposition junk for flushing fluid, provides 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 upper inside wall of lower contact 7 are provided with dust ring 3, upper inside wall and the bottom of described sheath 4 are all provided with sealing mat 5, sealing mat 5 V-type combination sealing pads, the V-type mouth of the V-type combination sealing pad of the upper inside wall of sheath 4 upward, the V-type mouth down of the V-type combination sealing pad of the inner wall lower of sheath 4.
In order to ensure the stability of integral sealing means, make to connect reliably between its all parts, in the present embodiment, the lower end of the sheath 4 of tubulose and upper end are equipped with internal thread and form interior connecting portion, described main body joint 1 lower end and lower contact 7 upper end are equipped with external screw thread, main body joint 1 lower end and lower contact 7 upper end respectively by sheath 4 upper and lower side that is threaded, and run through fixing at screw connection point with connecting pin 6.
In sum, this down-hole washing well water filling intubation seal device of the present invention is while meeting the sealing of dispensing well concentric double pipe dispensing intubate, effectively can also solve the two-tube dispensing sealing mechanism of conventional concentric and cause the easy fouling of intubate sealing place and junk deposition because cannot self-cleaning be carried out, the problem of final intubate seal fails, strengthen the sealing reliability of intubate seal, improve concentric double pipe dispensing job success ratio, realize the Efficient Development effect of oil field dispensing well.
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. a down-hole washing well water filling intubation seal device, comprise the main body joint (1) of the tubulose connected in turn from top to bottom, sheath (4) and lower contact (7), it is characterized in that: the sheath (4) of described tubulose is equal with the internal diameter of lower contact (7), the internal diameter of the main body joint (1) of described tubulose is gradual change shape, become large gradually by lower and upper internal diameter, and its minimum diameter equals the internal diameter of sheath (4) and lower contact (7); The tube wall of described main body joint (1) is also provided with the installing hole penetrating tube wall, and this installing hole, built with ball-and-seat (2), makes main body joint (1) by tube wall outward to the inner one-way conduction of tube wall.
2. down-hole washing well water filling intubation seal device as claimed in claim 1, is characterized in that: described main body joint (1) inwall be by lower and on annular stepped shape, the cascade ring internal diameter of foot equals the internal diameter of sheath (4) and lower contact (7).
3. washing well water filling intubation seal device in down-hole as claimed in claim 1 or 2, it is characterized in that: the inner wall lower of described main body joint (1) and the upper inside wall of lower contact (7) are provided with dust ring (3), upper inside wall and the bottom of described sheath (4) are all provided with sealing mat (5).
4. washing well water filling intubation seal device in down-hole as claimed in claim 3, it is characterized in that: described sealing mat (5) position 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, the V-type mouth down of the V-type combination sealing pad of the inner wall lower of sheath (4).
5. washing well water filling intubation seal device in down-hole as claimed in claim 1, it is characterized in that: the lower end of the sheath (4) of described tubulose and upper end are equipped with internal thread and form interior connecting portion, described main body joint (1) lower end and lower contact (7) upper end are equipped with external screw thread, main body joint (1) lower end and lower contact (7) upper end respectively by the sheath that is threaded (4) upper and lower side, and run through fixing at screw connection point with connecting pin (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615672.8A CN105156061B (en) | 2015-09-25 | 2015-09-25 | A kind of underground washing well water filling intubation seal device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615672.8A CN105156061B (en) | 2015-09-25 | 2015-09-25 | A kind of underground washing well water filling intubation seal device |
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| CN105156061A true CN105156061A (en) | 2015-12-16 |
| CN105156061B CN105156061B (en) | 2018-04-03 |
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| CN201510615672.8A Active CN105156061B (en) | 2015-09-25 | 2015-09-25 | A kind of underground washing well water filling intubation seal device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267978A (en) * | 2018-09-07 | 2019-01-25 | 中国石油化工股份有限公司 | A kind of separate injection tubing string |
| CN109322646A (en) * | 2017-07-31 | 2019-02-12 | 中国石油天然气股份有限公司 | A kind of separate injection tubing string and application method for flushing |
Citations (7)
| 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 |
| 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 |
| 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 |
-
2015
- 2015-09-25 CN CN201510615672.8A patent/CN105156061B/en active Active
Patent Citations (7)
| 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 |
| 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 |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322646A (en) * | 2017-07-31 | 2019-02-12 | 中国石油天然气股份有限公司 | A kind of separate injection tubing string and application method for flushing |
| 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 |
| CN109267978A (en) * | 2018-09-07 | 2019-01-25 | 中国石油化工股份有限公司 | A kind of separate injection tubing string |
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| Publication number | Publication date |
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| CN105156061B (en) | 2018-04-03 |
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