CN203476282U - Staged fracturing packer of horizontal well - Google Patents
Staged fracturing packer of horizontal well Download PDFInfo
- Publication number
- CN203476282U CN203476282U CN201320522535.6U CN201320522535U CN203476282U CN 203476282 U CN203476282 U CN 203476282U CN 201320522535 U CN201320522535 U CN 201320522535U CN 203476282 U CN203476282 U CN 203476282U
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- cylinder sleeve
- packer
- staged fracturing
- horizontal well
- central tube
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Abstract
The utility model belongs to the field of underground fracturing operation tool of a horizontal well, and relates to a staged fracturing packer of the horizontal well. The staged fracturing packer comprises an upper joint, a central pipe, an end cap, a rubber sleeve combination, a cylinder sleeve, a piston and a lower joint, wherein an outer ledge is arranged on the central section of the central pipe, the cylinder sleeve is of an upper-lower section structure, an inner ledge is arranged on the upper end of the upper cylinder sleeve and overlaps over the outer ledge in the central section of the center tube, the piston is connected to the lower inner tube wall of the upper cylinder sleeve through threads, and the lower cylinder sleeve is fixed on the outer tube wall of the lower joint through positioning screw. The staged fracturing packer is provided with an anti-error seat mechanism, and effectively prevents the packer from error sealing from the position under the packer to a design position. The staged fracturing packer is excellent in sealing performance and stability.
Description
Technical field
The utility model belongs to water of oil-gas field horizontal well fracturing work downhole tool field, relates to a kind of staged fracturing of horizontal well packer.
Background technology
In recent years, staged fracturing technology is applied to Oil/gas Well more and more widely, to increase oil gas well capacity, improves effective development degree of oil-gas reservoir.The hydraulic base sealed packer of existing fractured horizontal well, comprise top connection, central tube, setting mechanism, lower contact etc., setting mechanism is comprised of packing element, hydraulic cylinder and piston, and hydraulic cylinder is tubular structure, and piston is positioned at the cavity body of hydraulic cylinder and central tube.When carrying out pressing crack construction, in tubing string, there is pressure reduction with sleeve pipe annular space, the liquid-driving piston in tubing string moves up, and drives hydraulic cylinder compression packer packing element, makes its expansion be close to sleeve pipe and realizes setting.The major defect of its existence is: the one: hydraulic base sealed packer is in the process of going into the well, existence because of surge pressure in well, when not arriving the setting position of design, surge pressure promotes piston and moves up, drive the up compression packer packing element of hydraulic cylinder, cause its mistake setting, need upper lifting pipe post repeatedly, make after removing seal for packer, then go and go into the well, until packer arrives the setting position of design, in upper lifting pipe post process, constantly compressed then resilience of packing element, causes that packing element is tired, causes the sealing performance of packing element to decline; The 2nd: in pressing crack construction process, fracturing fluid enters space between piston and hydraulic cylinder, easily causes the generation of packer sand card accident.
Summary of the invention
The purpose of this utility model is to overcome the defect that hydraulic base sealed packer mistake is setting, sealing is poor, tubing string easily blocks that above-mentioned prior art exists, and a kind of staged fracturing of horizontal well packer is provided.
The utility model is achieved through the following technical solutions:
The utility model is comprised of top connection, central tube, end cap, packing element combination, cylinder sleeve, piston, lower contact, and the middle part of central tube is provided with outer shoulder, and the outer tube wall of outer shoulder bottom is provided with locking screw; Cylinder sleeve is divided into upper and lower two-part structure, and upper cylinder half set upper side is provided with interior shoulder, is overlapped on the outer shoulder at central tube middle part, and piston is threaded connection on the inner tubal wall of upper cylinder sleeve bottom, and lower cylinder sleeve is fixed on the outer tube wall of lower contact by dog screw.
The beneficial effects of the utility model are: the one, the lower contact of packer, lower cylinder sleeve form anti-error seat mechanism, prevent packer before design attitude due to the factors such as casing deformation cause its mistake setting; The 2nd, the cooperation that is connected with upper cylinder sleeve of the piston of packer, lock ring, during packer set, lock ring is locked on the outer tube wall of outer shoulder bottom of central tube, and the upper cylinder half moulding cylinder that is locked, makes packer forever setting simultaneously, better tightness, stability is stronger.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
In figure, mark implication is:
1-top connection; 2-central tube; 3-end cap; 4-protrusion-dispelling pad; 5-packing element; 6-spacer ring; 7-upper cylinder sleeve; 8-lock ring; 9-piston; 10-lower cylinder sleeve; 11-shear pin; 12-lower contact; 13-dog screw.
The specific embodiment
As shown in Figure 1, the utility model is comprised of top connection 1, central tube 2, end cap 3, packing element combination, cylinder sleeve, piston 9, lower contact 12, and the middle part of central tube 2 is provided with outer shoulder; Cylinder sleeve is divided into upper and lower two-part structure, upper cylinder sleeve 7 upper ends are provided with interior shoulder, be overlapped on the outer shoulder at central tube 2 middle parts, piston 9 is threaded connection on upper cylinder sleeve 7 bottom inner tubal walls, and lower cylinder sleeve 10 is fixed on the outer tube wall of lower contact 12 by dog screw 13.
The outer tube wall of the outer shoulder bottom of described central tube 2 is provided with locking screw; The piston 9 upper end inner tubal walls lock ring 8 that has been threaded, has the screw thread that the locking screw with central tube 2 bottom outer tube walls cooperatively interacts on lock ring 8 inner tubal walls, after pressing crack construction finishes, can effectively prevent that piston 9 is descending, packer is realized forever setting.
The two ends of packing element combination are provided with the circulus protrusion-dispelling pad 4 that adopts expansion of metal material to make, and in packer set compression packing element process, packing element extruding protrusion-dispelling pad 4 clings on casing wall its expansion, can effectively protect packing element to improve its sealing and stability.
In the top of described upper cylinder sleeve 7, between shoulder and central tube 2, be provided with sealing ring.
When carrying out staged fracturing of horizontal well construction, first the utility model is connected and is lowered to design attitude with other kits, drop into setting ball, the setting ball of pumping arrives ball seat position, tubing string bottom, then suppresses settingly, cuts off shear pin 11 when pressure reaches certain numerical value, piston 9 drives with lock ring 8 and the upper cylinder sleeve 7 of its connection up, compression packing element clings on casing wall it, and lock ring 8 is locked on central tube 2, realizes packer setting.
Claims (4)
1. a staged fracturing of horizontal well packer, is comprised of top connection (1), central tube (2), end cap (3), packing element combination, cylinder sleeve, piston (9), lower contact (12), it is characterized in that: the middle part of described central tube (2) is provided with outer shoulder; Cylinder sleeve is divided into upper and lower two-part structure, upper cylinder sleeve (7) upper end is provided with interior shoulder, be overlapped on the outer shoulder at central tube (2) middle part, piston (9) is threaded connection on the inner tubal wall of upper cylinder sleeve (7) bottom, and lower cylinder sleeve (10) is fixed on the outer tube wall of lower contact (12) by dog screw (13).
2. a kind of staged fracturing of horizontal well packer according to claim 1, is characterized in that: the outer tube wall of the outer shoulder bottom of described central tube (2) is provided with locking screw; Piston (9) the upper end inner tubal wall lock ring (8) that has been threaded, has the screw thread that the locking screw with central tube (2) bottom outer tube wall cooperatively interacts on lock ring (8) inner tubal wall.
3. a kind of staged fracturing of horizontal well packer according to claim 1 and 2, is characterized in that: the two ends of described packing element combination are provided with the circulus protrusion-dispelling pad (4) that adopts expansion of metal material to make.
4. a kind of staged fracturing of horizontal well packer according to claim 1 and 2, is characterized in that: in the top of described upper cylinder sleeve (7), between shoulder and central tube (2), be provided with sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320522535.6U CN203476282U (en) | 2013-08-26 | 2013-08-26 | Staged fracturing packer of horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320522535.6U CN203476282U (en) | 2013-08-26 | 2013-08-26 | Staged fracturing packer of horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203476282U true CN203476282U (en) | 2014-03-12 |
Family
ID=50224629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320522535.6U Expired - Lifetime CN203476282U (en) | 2013-08-26 | 2013-08-26 | Staged fracturing packer of horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203476282U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847301A (en) * | 2015-04-28 | 2015-08-19 | 中国石油天然气股份有限公司 | Open hole packer |
| CN106121579A (en) * | 2016-09-06 | 2016-11-16 | 中国石油化工股份有限公司 | Bi-directional compression hydraulic setting is without anchoring packer and using method thereof |
-
2013
- 2013-08-26 CN CN201320522535.6U patent/CN203476282U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104847301A (en) * | 2015-04-28 | 2015-08-19 | 中国石油天然气股份有限公司 | Open hole packer |
| CN104847301B (en) * | 2015-04-28 | 2017-12-05 | 中国石油天然气股份有限公司 | Open hole packer |
| CN106121579A (en) * | 2016-09-06 | 2016-11-16 | 中国石油化工股份有限公司 | Bi-directional compression hydraulic setting is without anchoring packer and using method thereof |
| CN106121579B (en) * | 2016-09-06 | 2018-08-21 | 中国石油化工股份有限公司 | Bi-directional compression hydraulic setting is without anchoring packer and its application method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |
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| CX01 | Expiry of patent term |