CN202249917U - Back flushing packer - Google Patents
Back flushing packer Download PDFInfo
- Publication number
- CN202249917U CN202249917U CN2011203528020U CN201120352802U CN202249917U CN 202249917 U CN202249917 U CN 202249917U CN 2011203528020 U CN2011203528020 U CN 2011203528020U CN 201120352802 U CN201120352802 U CN 201120352802U CN 202249917 U CN202249917 U CN 202249917U
- Authority
- CN
- China
- Prior art keywords
- washing
- sands
- fishing
- pipe column
- spacer ring
- 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
The utility model relates to a back flushing packer used in match with a sand washing and fishing method of an absorption well. A limit coupling, a back flushing sieve tube, a central pipe and a lower connector of the back flushing packer are connected sequentially, the inner diameter of the limit coupling is more than the diameter of an inner pipe column body for washing and fishing sands and is less than the outer diameter of an inner pipe column coupling for washing and fishing sands; and a spacer ring I, a rubber barrel I, a spacer ring II, a rubber barrel II, a spacer ring III, a rubber barrel III and a spacer ring IV are sequentially sheathed on the central pipe. The back flushing packer realizes the connection of an inner pipe column for washing and fishing sands and an outer pipe column for washing and fishing sands to build a circulating passage of the inner pipe column for washing and fishing sands and the outer pipe column for washing and fishing sands, so as to carry foundation sands in the pipe column for washing and fishing sands away from the ground. The back flushing packer overcomes the defects that the circulation of sand washing liquid between the inner pipe column for washing and fishing sands and the outer pipe column for washing and fishing sands for the existing pakers, and that the existing pakers cannot connect and fix the inner pipe column for washing and fishing sands and the outer pipe column for washing and fishing sands.
Description
Technical field:
The utility model relates to a kind of absorption well towards dragging for the matching used backwash packer of sand method.
Background technology:
At present; Employed packer had self-packing packer, hydraulic differential pressure set packer, compression packer and KFX backwash packer when absorption well dashed and to drag for the sand operation; These several kinds of packers all exist some shortcomings in use; Though wherein self-packing packer, hydraulic differential pressure set packer and KFX backwash packer packing oil jacket annular space voluntarily can not form the inside and outside circulation of dragging for sandpipe intercolumniation sand cleaning fluid of dashing, can not connect and fix inside and outside towards dragging for the sandpipe post.And compression packer packing oil jacket annular space voluntarily.
The utility model content:
The technical problem that the utility model will solve provides a kind of backwash packer, and this backwash packer has been realized connecting inside and outside dashing and dragged for the sandpipe post, sets up inside and outside dashing and drags for sandpipe post circulation canal, will take ground out of towards the reservoir sand that drags in the sandpipe post.Overcome existing packer can not form inside and outside dash the circulation drag for sandpipe intercolumniation sand cleaning fluid with can not be connected and fix inside and outside towards the deficiency of dragging for the sandpipe post.
The technical scheme that the utility model is taked is: a kind of backwash packer comprises central tube and lower contact; Spacing box cupling, backwash screen casing, central tube, lower contact connect in order, and spacing box cupling internal diameter drags for sandpipe post body diameter greater than interior dashing, and drag for sandpipe post box cupling external diameter less than interior dashing; Be set with spacer ring I, packing element I, spacer ring II, packing element II, spacer ring III, packing element III and spacer ring IV on the central tube in order.
The beneficial effect of the utility model is: the utility model is owing to adopted the mode of spacing box cupling; Thereby have the inside and outside function of dragging for the sandpipe post of dashing of connection, and set up inside and outside dashing and dragged for sandpipe post circulation canal, will take ground out of towards the reservoir sand that drags in the sandpipe post; Effective packing perforated interval; Prevented that the sand cleaning fluid leakage from getting into the stratum, protected oil reservoir not receive the pollution of sand cleaning fluid effectively, helped oil well and exploit for a long time.
Description of drawings:
Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation.
Accompanying drawing is the structural representation of the utility model.
The specific embodiment:
Shown in accompanying drawing, a kind of backwash packer comprises central tube 10 and lower contact 11; Spacing box cupling 1, backwash screen casing 2, central tube 10, lower contact 11 connect in order, and spacing box cupling 1 internal diameter drags for sandpipe post body diameter greater than interior dashing, and drag for sandpipe post box cupling external diameter less than interior dashing; Be set with spacer ring I 3, packing element I 4, spacer ring II5, packing element II6, spacer ring III7, packing element III8 and spacer ring IV9 on the central tube 10 in order.
The utility model lower contact 11 connects outwash and drags for the sandpipe post; In dash and to drag for the sandpipe post and in the middle of the utility model, be lowered to; Spacing box cupling 1 internal diameter drags for sandpipe post body diameter greater than interior dash, and drags for sandpipe post box cupling external diameter less than interior dashing, and interior dashing dragged for sandpipe post body and passed spacing box cupling 1; Freely move up and down in the utility model towards dragging for the sandpipe post in allowing, dash the moving range of dragging for the sandpipe post in simultaneously spacing box cupling 1 restriction.
Spacing box cupling connects backwash screen casing 21 time, and when pumping packer pod apertures was opened, sand cleaning fluid got into inside and outside dashing through backwash screen casing 2 and drags for sandpipe band of column shape space, and drags for the sandpipe post through interior towards dragging for to dash in the entering of sand nib, is circulated to ground.
It is understandable that; More than about the specific descriptions of the utility model; Only be used to the utility model is described and be not to be subject to the described technical scheme of the utility model embodiment; Those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the utility model, to reach identical technique effect; As long as satisfy the use needs, all within the protection domain of the utility model.
Claims (1)
1. a backwash packer comprises central tube (10) and lower contact (11); It is characterized in that: spacing box cupling (1), backwash screen casing (2), central tube (10), lower contact (11) connect in order, and spacing box cupling (1) internal diameter drags for sandpipe post body diameter greater than interior dashing, and drag for sandpipe post box cupling external diameter less than interior dashing; Be set with spacer ring I (3), packing element I (4), spacer ring II (5), packing element II (6), spacer ring III (7), packing element III (8) and spacer ring IV (9) on the central tube (10) in order.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203528020U CN202249917U (en) | 2011-09-20 | 2011-09-20 | Back flushing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203528020U CN202249917U (en) | 2011-09-20 | 2011-09-20 | Back flushing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202249917U true CN202249917U (en) | 2012-05-30 |
Family
ID=46111176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203528020U Expired - Fee Related CN202249917U (en) | 2011-09-20 | 2011-09-20 | Back flushing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202249917U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941510A (en) * | 2022-06-17 | 2022-08-26 | 程显达 | Circulation unblocking sand fishing process system |
-
2011
- 2011-09-20 CN CN2011203528020U patent/CN202249917U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114941510A (en) * | 2022-06-17 | 2022-08-26 | 程显达 | Circulation unblocking sand fishing process system |
| CN114941510B (en) * | 2022-06-17 | 2024-03-22 | 盘锦博瑞石油工程有限公司 | Circulating blocking-removing sand-fishing process system |
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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: 20120530 Termination date: 20130920 |