CN2314388Y - Straddle packer - Google Patents
Straddle packer Download PDFInfo
- Publication number
- CN2314388Y CN2314388Y CN 97247553 CN97247553U CN2314388Y CN 2314388 Y CN2314388 Y CN 2314388Y CN 97247553 CN97247553 CN 97247553 CN 97247553 U CN97247553 U CN 97247553U CN 2314388 Y CN2314388 Y CN 2314388Y
- Authority
- CN
- China
- Prior art keywords
- steps
- mandrel
- supported
- packer
- lower sub
- 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 - Lifetime
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Abstract
The utility model relates to a straddle packer. Compared with the existing pin break type packers, the straddle packer is characterized in that the lower part of a central spindle 1 is provided with steps 4, and a lower joint 3 is provided with a plurality of elastic supporting claws 5; the upper parts of the supporting claws 5 are bulged inwards to form steps 6, the steps 4 on the central spindle 1 are supported on the steps 6 of the supporting claws 5 on the lower joint 3, and shearing pins 2 are not arranged in general. The steps 4 on the central spindle 1 are supported on the steps 6 of the supporting claws on the lower joint again once seat seal is unsealed in the process of drilling, a rubber cylinder is arranged in a well without damage under the state of free shrinkage, and reliable seat seal force is provided during seat seal to cause a lower packer to seal a seat first. The utility model has high test success rate and simple structure.
Description
The utility model relates to a kind of straddle test packer that is used for formation testing.
The straddle test packer of existing use is the packer that cuts off of imitated U.S. MFE company, and mandrel 1 supports by cutting off 2, guarantees that packing element is in free state and goes into the well, and provides an envelope power to lower packet.Be easy to cut off in advance but in going down process, cut off 2, make packing element be in compressive state and go into the well, damage packing element, cause the seat envelope not tight, or lower packet seat envelope is not tight, the straddle test failure.A kind of new-type nothing of " examination of oil gas well surveying " 94 year the 4th phase, 44 pages of Wang Xiaobo, Li Quan introductions cuts off the straddle test packer, mandrel is controlled by latch mechanism, in case seat Fengkai well, this packer just is in runaway condition in going down process, the problems referred to above appear, and complex structure.
The purpose of this utility model is to guarantee that packing element is in the free shrink state and goes into the well, and provides reliable seat envelope power to lower packet, improves the straddle test success ratio.
Technical solution of the present utility model is:
Novel striding every packer comprises top connection, mandrel 1, packing element mandrel, packing element, lower sub 3, cuts off 2, it is characterized in that mandrel 1 bottom is provided with step 4, lower sub 3 is provided with several resiliency supported pawls 5, each support claw 5 top is to projecting inward formation step 6, step 4 on the mandrel 1 is supported on the resiliency supported pawl step 6 in the lower sub 3, and step 4 and step 6 all have the chamfering of certain angle.
Resiliency supported pawl in the utility model technical solution can be processed into the cylindrical shell of the certain wall thickness of certain-length, and a side is processed an inner chamber along the axis direction opening in lower sub, and cylindrical shell is contained in this inner chamber, and the step 4 on the mandrel is supported on the cylindrical shell upper surface.
Cutting off in the utility model technical solution 2 can not adorned or remove and cut off 2.
The utility model compared with prior art has simple in structure, dependable performance, and cutting off 2 generally speaking can not adorn.Even packer set in going down process, on carry separating and be honored as a queen, the step 4 on the mandrel 1 is supported on again on the step 6 in the lower sub 3, guarantees that packing element is in the free shrink state and goes into the well, and is not damaged; But provide seat envelope power to make lower packet seat envelope earlier, test success ratio height during the seat envelope.
Fig. 1 is the utility model and the existing main cut-open view that cuts off an embodiment of packer different piece.
Introduce the utility model and the existing implementation method that cuts off the packer different piece below.Process step 4 in mandrel 1 bottom, step 4 is made of two cylinders that do not wait (up big and down small), also groove, and step 4 has the chamfering of certain angle.Process several resiliency supported pawls 5 in lower sub 3, job operation is to process the groove 7 that several are " door " shape in lower sub 3, and each resiliency supported pawl 5 top is to projecting inward formation step 6, and step 6 has the chamfering of certain angle.Cut off and 2 do not adorn (big and have the well of enough seat envelope loads to load onto to cut off) generally speaking for boring resistance down.
The resiliency supported pawl also can be processed into the cylindrical shell of the certain wall thickness of certain-length, and a side is processed an inner chamber along the axis direction opening in lower sub, and cylindrical shell is contained in this inner chamber, and the step 4 on the mandrel is supported on the cylindrical shell upper surface.
When envelope seat, top gravity at first is pressed on the resiliency supported pawl step 6 in the lower sub 3 by the step on the mandrel 14, and passes to lower packet seat envelope, when pressure during greater than the convergent force of resiliency supported pawl, resiliency supported pawl distending, mandrel 1 is descending, compression glue tube base envelope.The upper lifting pipe post gets final product deblocking, and the step 4 on the mandrel 1 is supported on again on the resiliency supported pawl step 6.
Claims (2)
1. novel striding every packer comprises: top connection, mandrel 1, packing element mandrel, packing element, lower sub 3, cut off 2, it is characterized in that mandrel 1 bottom is provided with step 4, lower sub 3 is provided with several resiliency supported pawls 5, each support claw 5 top is to projecting inward formation step 6, step 4 on the mandrel 1 is supported on the resiliency supported pawl step 6 in the lower sub 3, and step 4 and step 6 all have the chamfering of certain angle.
2. novel striding every packer according to claim 1 is characterized in that the resiliency supported pawl is processed into the cylindrical shell of the certain wall thickness of certain-length, and a side is along the axis direction opening; Processing one inner chamber in lower sub, cylindrical shell is contained in this inner chamber, and the step 4 on the mandrel is supported on the upper surface of cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97247553 CN2314388Y (en) | 1997-10-21 | 1997-10-21 | Straddle packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97247553 CN2314388Y (en) | 1997-10-21 | 1997-10-21 | Straddle packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2314388Y true CN2314388Y (en) | 1999-04-14 |
Family
ID=33954995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97247553 Expired - Lifetime CN2314388Y (en) | 1997-10-21 | 1997-10-21 | Straddle packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2314388Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562935A (en) * | 2010-12-21 | 2012-07-11 | 珠海格力电器股份有限公司 | Vibration-proof device and fixing device of air conditioner outdoor unit with same |
-
1997
- 1997-10-21 CN CN 97247553 patent/CN2314388Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562935A (en) * | 2010-12-21 | 2012-07-11 | 珠海格力电器股份有限公司 | Vibration-proof device and fixing device of air conditioner outdoor unit with same |
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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 | ||
| CX01 | Expiry of patent term |