CN2721865Y - Reducing and cracking packer - Google Patents
Reducing and cracking packer Download PDFInfo
- Publication number
- CN2721865Y CN2721865Y CN 200320127564 CN200320127564U CN2721865Y CN 2721865 Y CN2721865 Y CN 2721865Y CN 200320127564 CN200320127564 CN 200320127564 CN 200320127564 U CN200320127564 U CN 200320127564U CN 2721865 Y CN2721865 Y CN 2721865Y
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- CN
- China
- Prior art keywords
- main body
- top connection
- connection main
- sliding sleeve
- pressure break
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- 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 reducing and cracking packer, belonging to oilfield flooding tools. The reducing and cracking packer is composed of an upper joint main body, a filter screen, a current limiting sliding bush, a center pipe, an upper pile casing, a lower pile casing, a rubber tube, and a lower joint. Both ends of the center pipe sheathed with the rubber tube are respectively connected with the upper joint main body and the lower joint in an external thread mode; both ends of the upper pile casing are respectively connected with the upper joint main body and the rubber tube in an internal thread mode. Both ends of the lower pile casing are respectively connected with the rubber tube and the lower joint in an internal thread mode; the filter screen with a kerf is embedded in the fender table of the inner cavity of the upper joint main body, a sealed annular cavity body is formed in the inner cavity of the upper joint main body. The inner of the pipe wall of the upper joint main body is provided with a liquid inlet hole communicated with the annular cavity body; the middle part is provided with a plurality of liquid outlet holes, and the liquid inlet hole and liquid outlet holes are disconnected; the current limiting sliding bush is embedded in the inner cavity of the upper joint main body, and the hole diameter of the current limiting sliding bush is smaller than the diameter of the liquid outlet hole. The sealing sliding bush can replace the current limiting sliding bush according to the number of plies of fracturing; the sealing sliding bush and the current limiting sliding bush can be used by combination, which can realize multiple layer fracturing.
Description
Technical field: the utility model relates to a kind of deceleration pressure break packer, belongs to a kind of of oil-field flooding instrument.
Background technology: existing pressure break packer kind is a lot, but mainly contains two kinds, and a kind of is expanding, and another kind is a compression.Expanding central tube slot sand control packer and the matching used sandblaster of compression packer all easily cause damage to sleeve pipe, make the impaired distortion of sleeve pipe.Reason is to be ejected into sleeve pipe after the nozzle of sandblaster dams, and the band sand liquid velocity of ejection is fast, easily causes casing damage, and makes the filling sand grains frangible, does not reach the pressing crack construction oil increasing effect.For solving this technical problem, a kind of practice is to be with casing on the sandblaster outer wall, again from a plurality of fluid hole fluids of casing, underspeed, but after smashing casing, the band sand liquid of ejection impacts sleeve pipe again, damage sleeve pipe equally again and make the filling sand grains frangible, do not reach the purpose of protective casing and volume increase; Another kind method is to adopt the water conservancy diversion packer, but this water conservancy diversion packer can only the pressure break individual layer; The employing reducer pipe that also has slows down band sand liquid, but in pressure break, can only the pressure break bottom, and can only press individual layer.
Summary of the invention: the purpose of this utility model is exactly at above-mentioned the deficiencies in the prior art, and a kind of deceleration pressure break packer is provided, and reduces the flow velocity of band sand liquid, reduces sleeve pipe and damages.
The technical solution of the utility model is: a kind of deceleration pressure break packer is made up of top connection main body, screen pack, current limliting sliding sleeve, central tube, upper and lower casing, packing element, lower contact; The two ends of the central tube of suit packing element respectively with top connection main body lower end, lower contact beyond thread connection; Last casing two ends connect with internal thread with top connection main body lower end, packing element upper end respectively; Following casing two ends connect with internal thread with packing element lower end, lower contact respectively; Put the screen pack that has slot on the retaining platform of top connection main body inner chamber, and in top connection main body inner chamber, form the annular housing of a sealing; In top connection main body tube wall, have the liquid pass hole that is communicated with annular housing; Top connection main body middle part has a plurality of fluid holes, and liquid pass hole is not communicated with fluid hole; Insert the current limliting sliding sleeve at top connection main body inner chamber, seal with sealing ring; The median pore diameter of current limliting sliding sleeve is far smaller than the diameter of fluid hole.
Two laminations are carried out when splitting in the stratum, the above-mentioned a kind of deceleration pressure break packer of two covers can be connected with oil pipe, and the current limliting sliding sleeve that is arranged in described a kind of pressure break packer that slows down on upper strata is replaced with the sealing sliding sleeve, and sealed sliding is applied mechanically shear pin and is fixed on the top connection main body, seals with sealing ring; Be arranged in the described a kind of lower contact of slowing down pressure break packer plug shutoff of lower floor.
The utility model compared with prior art has following advantage: 1, enter packing element through the liquid after the filtration of screen pack, make fracturing sand be difficult for entering, guaranteed after the pressure break that packing element reclaims easily, is difficult for Ka Jing; 2, insert the current limliting sliding sleeve in the top connection main body, during pressure break, current limliting sliding sleeve median pore diameter is far smaller than the diameter of fluid hole, thereby reduces flow velocity, reduces the impact injury of liquid to internal surface of sleeve pipe, reduces and fills the gravel damaged degree, makes fracturing effect better.3, at upper level top connection main body inner chamber input sealing sliding sleeve, drop into the current limliting sliding sleeve, can realize multiple fracturing at next stage top connection main body inner chamber.
Description of drawings: Fig. 1 is a kind of deceleration pressure break packer construction figure that is used for the individual layer pressure break; Fig. 2 is used for a kind of deceleration pressure break packer construction figure that two laminations split.
The specific embodiment: the utility model is done specific descriptions below in conjunction with accompanying drawing: referring to Fig. 1, a kind of deceleration pressure break packer is made up of top connection main body 1, screen pack 2, current limliting sliding sleeve 3, central tube 7, last casing 6, following casing 9, packing element 8, lower contact 10; The two ends of the central tube 7 of suit packing element 8 respectively with top connection main body 1 lower end, lower contact 10 beyond thread connection; Last casing 6 two ends connect with internal thread with top connection main body 1 lower end, packing element 8 upper ends respectively; Following casing 9 two ends connect with internal thread with packing element 8 lower ends, lower contact 10 respectively; Insert the screen pack 2 that has slot on the retaining platform of top connection main body 1 inner chamber, and in top connection main body 1 inner chamber, form the annular housing of a sealing; In top connection main body 1 tube wall, have the liquid pass hole 5 that is communicated with annular housing; Top connection main body 1 middle part has a plurality of fluid holes 4, and liquid pass hole 5 is not communicated with fluid hole 4; Insert current limliting sliding sleeve 3 at top connection main body 1 inner chamber, seal with sealing ring; The median pore diameter of current limliting sliding sleeve 3 is far smaller than the diameter of fluid hole 4.
When the pressure break individual layer, as shown in Figure 1, lower contact 10 plug shutoff, big discharge capacity liquid be because the damming of the current limliting sliding sleeve 3 of top connection main body 1 inner chamber, and liquid is entered in the chamber between packing element 8 and the central tube 7 by screen pack 2, liquid pass hole 5, packing element 8 is expanded, high-speed liquid is from current limliting sliding sleeve 3 ejection, clamp-ons the stratum through large tracts of land fluid hole 4 again after entering major path, reduced flow velocity, also reduced the impact force of band sand liquid, alleviated the degree of crushing of filling gravel sleeve pipe.
Two laminations are carried out when splitting in the stratum, referring to Fig. 2, the above-mentioned a kind of deceleration pressure break packer of two covers can be connected with oil pipe, that is: be arranged in lower floor a kind of pressure break packer that slows down top connection 1 and be positioned at the upper strata a kind of pressure break packer that slows down lower contact 10 respectively with the oil pipe two ends to be threaded, and, a kind of current limliting sliding sleeve 3 usefulness sealing sliding sleeve 11 described in the pressure break packer that slows down that is positioned at the upper strata is replaced, and sealing sliding sleeve 11 usefulness shear pins 12 are fixed on the top connection main body 1, seal with sealing ring; Be arranged in lower contact 10 usefulness plugs 13 shutoff of a kind of pressure break packer that slows down of lower floor.
Behind the intact individual layer of pressure break, the steel ball of respective diameters is dropped into sealing sliding sleeve 11 seats of honour envelope shown in Figure 2, under pressure, the shear pin 12 of fixing seal sliding sleeve 11 is cut off, 11 of sliding sleeves of sealing are gone in a kind of lower contact 10 endoporus of the pressure break packer that slows down at its place, and then in sealing sliding sleeve 11 place top connection main bodys 1, drop into current limliting sliding sleeve 3, and 3 of current limliting sliding sleeves are gone on the top connection main body 1 interior mesopore, thus finish second layer pressure break.
According to actual needs, when carrying out pressure break to two layers with overlying strata, but the upper lifting pipe post is realized multiple fracturing to the stratum of required pressure break.
Claims (2)
1, a kind of deceleration pressure break packer is made up of top connection main body (1), screen pack (2), current limliting sliding sleeve (3), central tube (7), last casing (6), following casing (9), packing element (8), lower contact (10); The two ends of the central tube (7) of suit packing element (8) respectively with top connection main body (1) lower end, lower contact (10) thread connection in addition; Last casing (6) two ends connect with internal thread with top connection main body (1) lower end, packing element (8) upper end respectively; Following casing (9) two ends connect with internal thread with packing element (8) lower end, lower contact (10) respectively; It is characterized in that: put the screen pack (2) that has slot on the retaining platform of top connection main body (1) inner chamber, and in top connection main body (1) inner chamber, form the annular housing of a sealing; In top connection main body (1) tube wall, have the liquid pass hole (5) that is communicated with annular housing; Top connection main body (1) middle part has a plurality of fluid holes (4), and liquid pass hole (5) is not communicated with fluid hole (4); Insert current limliting sliding sleeve (3) at top connection main body (1) inner chamber, seal with sealing ring; The median pore diameter of current limliting sliding sleeve (3) is less than the diameter of fluid hole (4).
2, a kind of deceleration pressure break packer as claimed in claim 1 is characterized in that: described lower contact (10) plug (13) shutoff; The upper end of described top connection main body (1) and oil pipe lower end are to be threaded; Oil pipe upper end and another set of above-mentioned deceleration pressure break packer are to be threaded, and, being positioned at the current limliting sliding sleeve (3) described in the deceleration pressure break packer of oil pipe upper end replaces with sealing sliding sleeve (11), sealing sliding sleeve (11) is fixed on the top connection main body (1) with shear pin (12), seals with sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320127564 CN2721865Y (en) | 2003-12-08 | 2003-12-08 | Reducing and cracking packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320127564 CN2721865Y (en) | 2003-12-08 | 2003-12-08 | Reducing and cracking packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2721865Y true CN2721865Y (en) | 2005-08-31 |
Family
ID=35012237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320127564 Expired - Fee Related CN2721865Y (en) | 2003-12-08 | 2003-12-08 | Reducing and cracking packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2721865Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953310A (en) * | 2014-05-18 | 2014-07-30 | 中国石油化工股份有限公司 | Toothless support packer |
-
2003
- 2003-12-08 CN CN 200320127564 patent/CN2721865Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953310A (en) * | 2014-05-18 | 2014-07-30 | 中国石油化工股份有限公司 | Toothless support 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: 20050831 Termination date: 20100108 |