CN2861468Y - Over-casing failure point fracturing packer - Google Patents
Over-casing failure point fracturing packer Download PDFInfo
- Publication number
- CN2861468Y CN2861468Y CN 200520104461 CN200520104461U CN2861468Y CN 2861468 Y CN2861468 Y CN 2861468Y CN 200520104461 CN200520104461 CN 200520104461 CN 200520104461 U CN200520104461 U CN 200520104461U CN 2861468 Y CN2861468 Y CN 2861468Y
- Authority
- CN
- China
- Prior art keywords
- packer
- sulfuration
- packing element
- over
- fuse
- 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
Links
Abstract
Disclosed is a fracturing packer for the fractured casing damage point of the casing damage well, which is mainly used to solve the problem that the pressure capacity and residual deformation and other pressure indexes of the packer rubber of the packer would not meet the requirements. It is characterized in that the fracturing packer for the casing damage point comprises an upper connector (1), an O-ring (2), a packer rubber base (3), a packer rubber (4), a sulfuration core (5) and a lower connector (6). Wherein the sulfuration core (5) is a integrated structure containing a sulfuration head and a center pipe, the packer rubber (4) is directly sulfurated in the sulfuration core (5) and the big and small curtain lines of the packer rubber (4) are laid by 10mm from the end of the sulfuration head, with the same angle. The packer is provided with the characteristics of increasing the pressure capacity and lowering residual deformation of packer rubber.
Description
Technical field:
The utility model relates to a kind of well tool down used in the oilfield stimulation augmented injection field, especially relates to a kind of packer that is used for the casing damaged well pressure break.
Background technology:
Generally speaking, the go into the well hole diameter and the packer that pass through of packer will have enough gaps, otherwise after the pressure break because card well accident just appears in the permanent set of packing element easily, therefore normal 5 1/2 " pressure break packer external diameter is about φ 114mm in the sleeve pipe.But after running into casing deformation or reinforcing, then external diameter is that packer about φ 114mm is just inapplicable.Packer will arrive pressure break in the normal sleeve pipe by cover height or reinforcing pipe, must dwindle the external diameter of packer, packer packing every the conventional relatively packer packing in gap every the gap will increase, requirement to withstand voltage indexs such as packing element bearing capacity and permanent sets obviously improves, and " the pressure break problem behind following casing deformation of φ 120mm of cased well generation latus rectum and the sealing and reinforcing can not be resolved always to cause present oil field 5 1/2 thus.
The utility model content:
For withstand voltage indexs such as the packing element bearing capacity that overcomes packer and permanent set can not satisfactory deficiency, the utility model provides a kind of over-casing failure point pressure break packer, and this kind over-casing failure point pressure break packer has the bearing capacity that can improve packing element, the characteristics that reduce the packing element permanent set.
The technical solution of the utility model is: this kind over-casing failure point pressure break packer comprises top connection, O shape circle, glue tube base, packing element, sulfuration fuse, lower contact.Wherein vulcanize fuse and be the integral structure that includes sulfuration head and central tube, packing element directly vulcanizes and is vulcanizing on the fuse, and the big cord on it and little cord are all from vulcanizing cephalic par 10mm cloth and adopting identical angle.
In addition, can on the sulfuration fuse, have the narrow slit that is used for filter sand.
The utlity model has following beneficial effect: owing to take the over-casing failure point pressure break packer of such scheme to change the connected mode of the packing element and the steel body of conventional inflatable packer, promptly vulcanizing the sulfuration fuse that head and central tube are designed to one, and packing element directly vulcanizes on the sulfuration fuse, increase the thickness of packing element weakness, be convenient to adjust the cage construction of packing element.In addition, owing to improved the cloth line position and the angle of lay of packing element in the past, promptly big cord and little cord have increased little cord length simultaneously all from sulfuration cephalic par 10mm cloth and adopt identical angle, thereby improved the bearing capacity of packing element, reduced the permanent set of packing element.Increased the narrow slit that is used for filter sand on this external sulfuration fuse, solved and used filter sand network folder copper wire cloth filter sand in the past, and often cause copper wire cloth breakdown, prevent the into halfway deficiency of sand, can prevent effectively that fracturing sand from entering in the packing element, guarantee the abundant deblocking of packer.
Description of drawings:
Accompanying drawing 1 is a structure sectional view of the present utility model.
1-top connection among the figure, 2-O shape circle, the 3-glue tube base, the 4-packing element, 5-vulcanizes fuse, 6-lower contact.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, this kind over-casing failure point pressure break packer is used for reference the structure of conventional inflatable packer, as shown in Figure 1, comprises top connection 1, O shape circle 2, glue tube base 3, packing element 4, sulfuration fuse 5, lower contact 6.Change the connected mode of the packing element and the steel body of conventional inflatable packer, promptly vulcanizing the sulfuration fuse 5 that head and central tube are designed to one, packing element 4 directly vulcanizes on sulfuration fuse 5, increases the thickness of packing element 4 weakness, is convenient to adjust the cage construction of packing element 4.Improve the cloth line position and the angle of lay of packing element in the past, promptly big cord and little cord increase little cord length simultaneously all from sulfuration cephalic par 10mm cloth and adopt identical angle, have improved the bearing capacity of packing element 4, have reduced the permanent set of packing element 4.
Design narrow slit filter sand has solved and has used filter sand network folder copper wire cloth filter sand in the past on this external sulfuration fuse 5, and often cause copper wire cloth breakdown, prevent the into halfway deficiency of sand, can prevent effectively that fracturing sand from entering in the packing element 4, guarantee the abundant deblocking of packer.
The operating principle of this kind of packer is to add hydraulic pressure in it, the slot of highly pressurised liquid through vulcanizing fuse 5 enters the inner chamber of packing element 4, makes its expansion packing oil sets annular space, bleeds off the hydraulic pressure in the packer, packing element 4 shrinks under self elastic force effect, realizes the packer deblocking.
This kind of packer is through the casing deformation well of 5 wells time and the crushing test of φ 108mm sealing and reinforcing well, maximum working pressure 38MPa, maximum permanent set 1.96% proves that this packer satisfies fully that fracture pressure is lower than 40MPa, latus rectum reaches 5 1/2 above " the pressure break requirements of casing deformation well and sealing and reinforcing well of φ 108mm.
During use, this kind of over-casing failure point pressure break packer mainly solve have latus rectum φ 108mm above cover height or reinforcing pipe and fracture pressure be no more than 40MPa 5 1/2 " casing damaged well pressure break; can improve the development degree of oilfield reserve, what this packer can also be used for the casing damaged well sealing and reinforcing simultaneously tests construction technology such as envelope.
Claims (2)
1, a kind of over-casing failure point pressure break packer, comprise top connection (1), lower contact (6), it is characterized in that: described over-casing failure point pressure break packer also comprises O shape circle (2), glue tube base (3), packing element (4), sulfuration fuse (5), wherein vulcanize fuse (5) for including the integral structure of sulfuration head and central tube, packing element (4) directly vulcanizes in sulfuration fuse (5), and the big cord on it and little cord are all from sulfuration cephalic par 10mm cloth and adopt identical angle.
2, a kind of over-casing failure point pressure break packer according to claim 1 is characterized in that: have the narrow slit that is used for filter sand on the sulfuration fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520104461 CN2861468Y (en) | 2005-08-12 | 2005-08-12 | Over-casing failure point fracturing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520104461 CN2861468Y (en) | 2005-08-12 | 2005-08-12 | Over-casing failure point fracturing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2861468Y true CN2861468Y (en) | 2007-01-24 |
Family
ID=37659097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520104461 Expired - Fee Related CN2861468Y (en) | 2005-08-12 | 2005-08-12 | Over-casing failure point fracturing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2861468Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071893A (en) * | 2010-12-03 | 2011-05-25 | 中国石油天然气股份有限公司 | Underground self-expansion hanger |
| CN102428248A (en) * | 2009-05-20 | 2012-04-25 | 贝克休斯公司 | Swelling packer and method of construction |
-
2005
- 2005-08-12 CN CN 200520104461 patent/CN2861468Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102428248A (en) * | 2009-05-20 | 2012-04-25 | 贝克休斯公司 | Swelling packer and method of construction |
| CN102071893A (en) * | 2010-12-03 | 2011-05-25 | 中国石油天然气股份有限公司 | Underground self-expansion hanger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070124 Termination date: 20140812 |
|
| EXPY | Termination of patent right or utility model |