CN201377312Y - Layered water injection tool - Google Patents
Layered water injection tool Download PDFInfo
- Publication number
- CN201377312Y CN201377312Y CN200920041800U CN200920041800U CN201377312Y CN 201377312 Y CN201377312 Y CN 201377312Y CN 200920041800 U CN200920041800 U CN 200920041800U CN 200920041800 U CN200920041800 U CN 200920041800U CN 201377312 Y CN201377312 Y CN 201377312Y
- Authority
- CN
- China
- Prior art keywords
- well
- packing element
- flushing
- joint
- seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A layered water injection tool comprises an upper joint, an inner tube, and a lower joint are connected in sequence, wherein a sheath is externally sleeved on the upper joint; a well flushing piston is mounted between the sheath and the inner pipe; the lower part of the sheath is connected with the joint of an upper packing element; the packing element is mounted at the joints of the upper packing element and the lower packing element; a packing element liner tube is arranged in the packing element; the upper part of the packing element liner tube is connected with the joint of the upper packing element, and the lower part thereof is connected with the upper part of a well flushing joint; the lower part of the well flushing joint is connected with the upper part of a check valve; the lower part of the check valve is positioned outside the lower joint; a pressure hole is formed at the upper part of the inner tube; a well flushing channel is formed between the inner tube and the packing element liner tube; a blocking communication hole and a well flushing communication hole are formed on the well flushing joint; a liquid-inlet communication hole is formed at the lower part of the inner tube; the lower part of the check valve is fixed on the lower joint through a deblocking pin; and a diameter reducing section is arranged at the lower part of the inner tube. The layered water injection tool is blocked when the water injection stops in a water well, the packing element cannot be contracted and expanded repeatedly. according to the requirement that the layered water injection tool is blocked, when the water injection stops in the water well is met, the inverse well-flushing can be achieved, the water flushing period of the water flushing well can be prolonged, the well repair time is reduced, and the economic benefit is improved.
Description
One, technical field
The utility model is the underground water-injection instrument of used for water injection wells in oil fields, is a kind of seperated layer water injection instrument.
Two, background technology
The seperated layer water injection tool kind that oil-field flooding is used is more, but all has some problems, and what have does not have a well-flushing passage, can not carry out anti-flushing well, causes the water injection well working time short, influences field produces; What have does not have a retaining mechanism, if when stopping for some reason to annotate often, packing element shrinks repeatedly, just expands and damage easily, cause the separated-zone water infection oil field well can not quantitative injection, make its layer water injection rate that has exceed the injection allocation amount, the layer water injection rate that has is not enough, becomes and shorts layer, does not reach the reasonable benefit of water flooding.
Three, summary of the invention
The purpose of this utility model provides a kind of seperated layer water injection instrument, makes the water injection well can well-flushing, and packing element can not shrink because of well stop annotating, and improves the application life of packer.
The purpose of this utility model is achieved in that by top connection, the well-flushing pipe, the well-flushing piston, interior pipe, the packing element assembly, seat of honour envelope piston, the fixing seal axle, following seat envelope piston joint, lock dog, seat envelope shear pin, seat envelope piston, following seat envelope piston, lower contact, lock ring, the deblocking shear pin, the shear pin cover, lock tube is formed, the top connection lower external thread is connected with well-flushing pipe top, the top connection lower internal thread is connected with interior pipe top, the well-flushing piston is installed between well-flushing pipe and the interior pipe, it under the well-flushing pipe packing element assembly, interior pipe bottom is connected with fixing seal axle top, packing element assembly bottom is connected with envelope piston top, the seat of honour, seat of honour envelope piston is suspended on the fixing seal axle, following seat envelope piston joint top is connected with envelope piston bottom, the seat of honour, following seat envelope piston joint bottom is connected with following envelope piston top, following seat envelope piston joint is locked on the fixing seal axle by lock dog, mount pad envelope piston between fixing seal axle and following the envelope piston, seat envelope piston is fixed on down on the seat envelope piston joint by seat envelope shear pin, seat envelope piston top endoporus encases lock dog, fixing seal axle bottom is connected with lower contact top, lock ring, the shear pin cover is sleeved in the lower contact, lock ring has outer unidirectional snap close, the shear pin cover is fixed in the lower contact by the deblocking shear pin, lock tube is arranged at following seat envelope piston bottom, lock tube has interior unidirectional snap close, the interior unidirectional snap close of lock tube can match with the outer unidirectional snap close of lock ring, last well washing hole is arranged at well-flushing pipe bottom, between interior pipe and the packing element assembly well-flushing passage is arranged, following well washing hole is arranged at packing element assembly bottom.
Supporting positive cover is installed in the lower contact, and supporting positive cover is under the lock tube.
The beneficial effects of the utility model are: the lock ring lock tube is arranged, and deblocking not when well stops annotating, packing element can not shrink repeatedly, expand, so packing element can not damage, and branch's water filling is long life tools.The well-flushing passage is arranged, when satisfying well and stop annotating, not under the requirement of deblocking, can realize anti-flushing well, can prolong the water injection cycle of water injection well, reduce the well workover number of times, increase economic efficiency.
Four, description of drawings
Accompanying drawing is a structure assembling drawing of the present utility model.
Five, the specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
Embodiment of the present utility model is by top connection 1, well-flushing pipe 2, well-flushing piston 3, interior pipe 4, packing element assembly 6, seat of honour envelope piston 9, fixing seal axle 10, following seat envelope piston joint 11, lock dog 12, seat envelope shear pin 13, seat envelope piston 14, following seat envelope piston 15, lower contact 16, lock ring 17, deblocking shear pin 18, shear pin cover 19, lock tube 20, supporting positive cover 21 is formed, top connection 1 lower external thread is connected with well-flushing pipe 2 tops, top connection 1 lower internal thread is connected with interior pipe 4 tops, well-flushing piston 3 is installed between well-flushing pipe 2 and the interior pipe 4, it under the well-flushing pipe 2 packing element assembly 6, interior pipe 4 bottoms are connected with fixing seal axle 10 tops, packing element assembly 6 bottoms are connected with envelope piston 9 tops, the seat of honour, seat of honour envelope piston 9 is suspended on the fixing seal axle 10, following seat envelope piston joint 11 tops are connected with envelope piston 9 bottoms, the seat of honour, following seat envelope piston joint 11 bottoms are connected with following envelope piston 15 tops, following seat envelope piston joint 11 is locked on the fixing seal axle 10 by lock dog 12, mount pad envelope piston 14 between fixing seal axle 10 and following the envelope piston 15, seat envelope piston 14 is fixed on down on the seat envelope piston joint 11 by seat envelope shear pin 13, seat envelope piston 14 top endoporus encase lock dog 12, fixing seal axle 10 bottoms are connected with lower contact 16 tops, lock ring 17, shear pin cover 19 is sleeved in the lower contact 16, lock ring 17 has outer unidirectional snap close, shear pin cover 19 is fixed in the lower contact 16 by deblocking shear pin 18, lock tube 20 is arranged at following seat envelope piston 15 bottoms, lock tube 20 has interior unidirectional snap close, the interior unidirectional snap close of lock tube 20 can match with the outer unidirectional snap close of lock ring 17, last well washing hole 5 is arranged at well-flushing pipe 2 bottoms, between interior pipe 4 and the packing element assembly 6 well-flushing passage 7 is arranged, following well washing hole 8 is arranged at packing element assembly 6 bottoms.Supporting positive cover 21 is installed in the lower contact 16, and supporting positive cover 21 is under the lock tube 20.The oil pipe male thread is arranged at lower contact 16 bottoms.
Under the interior pipe 4 top screw threads linked hole is arranged, on interior pipe 4 lower thread linked hole is arranged, on fixing seal axle 10 lower thread linked hole is arranged, this linked hole is under following the envelope piston joint 11.During water filling, the linked hole of water injection pressure under interior pipe 4 top screw threads imports into, makes well-flushing piston 3 be in initial point down, and well-flushing passage 7 is closed.Water injection pressure imports into through linked hole on interior pipe 4 lower thread and the linked hole on fixing seal axle 10 lower thread, at first cut off an envelope shear pin 13, it is descending to promote seat envelope piston 14, seat envelope piston 14 no longer encases lock dog 12, it is up that seat envelope piston joint 11 loses the locking back, under the pressure effect that the linked hole on interior pipe 4 lower thread and the linked hole on fixing seal axle 10 lower thread import into, seat of honour envelope piston 9, following seal piston 15, and to obtain thrust simultaneously up, packing element on the compression packing element assembly 6 makes it be in compand state Seal Oil casing.When seat of honour envelope piston 9, following envelope piston 15 were up, lock tube 20 was simultaneously up, and lock tube 20 and lock ring 7 interlock, and made packing element on the packing element assembly 6 also be in the compand state after the pressure disappearance and sealed up oil well casing.
During well-flushing, pressure is squeezed into from oil well casing, enters through last well washing hole 4 to make well-flushing piston 3 up, opens well-flushing passage 7, and well-flushing water flows out through following well washing hole 8 again realizes well-flushings.
During deblocking, on carry water injection string, packing element assembly 6 expansion is cut off deblocking shear pin 18 producing frictional force between back and the sleeve pipe on the sleeve pipe, lock ring 17 is up, realizes deblocking.
Claims (3)
1, a kind of seperated layer water injection instrument, by top connection (1), well-flushing pipe (2), well-flushing piston (3), interior pipe (4), packing element assembly (6), seat of honour envelope piston (9), fixing seal axle (10), following seat envelope piston joint (11), lock dog (12), seat envelope shear pin (13), seat envelope piston (14), following seat envelope piston (15), lower contact (16), lock ring (17), deblocking shear pin (18), shear pin cover (19), lock tube (20) is formed, it is characterized in that: top connection (1) lower external thread is connected with well-flushing pipe (2) top, top connection (1) lower internal thread is connected with interior pipe (4) top, well-flushing piston (3) is installed between well-flushing pipe (2) and the interior pipe (4), under the well-flushing pipe (2) packing element assembly (6), interior pipe (4) bottom is connected with fixing seal axle (10) top, packing element assembly (6) bottom is connected with envelope piston (9) top, the seat of honour, seat of honour envelope piston (9) is suspended on the fixing seal axle (10), following seat envelope piston joint (11) top is connected with envelope piston (9) bottom, the seat of honour, following seat envelope piston joint (11) bottom is connected with following envelope piston (15) top, following seat envelope piston joint (11) is locked on the fixing seal axle (10) by lock dog (12), mount pad envelope piston (14) between fixing seal axle (10) and following the envelope piston (15), seat envelope piston (14) is fixed on down on the seat envelope piston joint (11) by seat envelope shear pin (13), seat envelope piston (14) top endoporus encases lock dog (12), fixing seal axle (10) bottom is connected with lower contact (16) top, lock ring (17), shear pin cover (19) is sleeved in the lower contact (16), lock ring (17) has outer unidirectional snap close, shear pin cover (19) is fixed in the lower contact (16) by deblocking shear pin (18), lock tube (20) is arranged at following seat envelope piston (15) bottom, lock tube (20) has interior unidirectional snap close, the interior unidirectional snap close of lock tube (20) can match with the outer unidirectional snap close of lock ring (17), last well washing hole (5) is arranged at well-flushing pipe (2) bottom, between interior pipe (4) and the packing element assembly (6) well-flushing passage (7) is arranged, following well washing hole (8) is arranged at packing element assembly (6) bottom.
2, seperated layer water injection instrument according to claim 1 is characterized in that: lower contact (16) is gone up supporting positive cover (21) is installed, and supporting positive cover (21) is under the lock tube (20).
3, seperated layer water injection instrument according to claim 1 is characterized in that: the oil pipe male thread is arranged at lower contact (16) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920041800U CN201377312Y (en) | 2009-04-07 | 2009-04-07 | Layered water injection tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920041800U CN201377312Y (en) | 2009-04-07 | 2009-04-07 | Layered water injection tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201377312Y true CN201377312Y (en) | 2010-01-06 |
Family
ID=41517417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920041800U Expired - Fee Related CN201377312Y (en) | 2009-04-07 | 2009-04-07 | Layered water injection tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201377312Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291264A (en) * | 2013-05-28 | 2013-09-11 | 西南石油大学 | Safety stripping device of in-well pipe string |
| CN104929563A (en) * | 2015-05-27 | 2015-09-23 | 中国石油天然气股份有限公司 | Water injection packer |
-
2009
- 2009-04-07 CN CN200920041800U patent/CN201377312Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291264A (en) * | 2013-05-28 | 2013-09-11 | 西南石油大学 | Safety stripping device of in-well pipe string |
| CN103291264B (en) * | 2013-05-28 | 2015-08-05 | 西南石油大学 | Tubing string safety trip device in a kind of well |
| CN104929563A (en) * | 2015-05-27 | 2015-09-23 | 中国石油天然气股份有限公司 | Water injection packer |
| CN104929563B (en) * | 2015-05-27 | 2017-10-17 | 中国石油天然气股份有限公司 | Water injection packer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100106 Termination date: 20120407 |