CN202810775U - Large-pressure-difference well-washing packer - Google Patents
Large-pressure-difference well-washing packer Download PDFInfo
- Publication number
- CN202810775U CN202810775U CN 201220555547 CN201220555547U CN202810775U CN 202810775 U CN202810775 U CN 202810775U CN 201220555547 CN201220555547 CN 201220555547 CN 201220555547 U CN201220555547 U CN 201220555547U CN 202810775 U CN202810775 U CN 202810775U
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- piston
- cylinder sleeve
- well
- central tube
- flushing
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Abstract
A large-pressure-difference well-washing packer comprises an upper joint which is connected with a central tube and an upper cylinder sleeve. The inner wall of the upper cylinder sleeve is connected with a pressure guide sleeve, the pressure guide sleeve is connected with a liner tube, six through holes are distributed on the liner tube, and a gap is reserved between the inner wall of the liner tube and the outer wall of the central tube. A spring and a well-washing piston are arranged below the pressure guide sleeve, at least six liquid holes are arranged on the lower portion of the upper cylinder sleeve, the lower end of the upper cylinder sleeve is connected with an upper sheath, a rubber cylinder and a lower sheath are sleeved on the outer wall of the liner tube arranged below the upper sheath, the lower sheath is connected with a sitting piston, a liquid inlet is arranged in the middle of the sitting piston, and the lower end of the sitting piston is connected with a lower cylinder sleeve. A fixing piston is arranged below the sitting piston and connected with a retaining ring, a locking ring is arranged in a pit formed by the fixed piston and the outer wall of the retaining ring, the lower end of the central tube is connected with a lower joint, and a balance piston is arranged in the lower cylinder sleeve arranged above the lower joint. The large-pressure-difference well-washing packer has the advantages of being stable and reliable in sitting, being capable of balancing inner pressure and annulus pressure through the balance piston and being capable of bearing large pressure difference.
Description
Technical field
The utility model relates to the used a kind of instrument in oil extraction in oil field engineering separate zone waterflooding technology field, belongs to a kind of large pressure reduction well packer capable of flushing well.
Background technology
In the oil production engineering in oil field, often use packer, packer is exactly when seperated layer water injection multiple zone to be divided into some intervals, and the instrument of oil reservoir water absorption difference is regulated in oil reservoir control water filling.The packer that uses at present is of a great variety, what have can bear annular pressure, what have can bear lower annular pressure, what have can bear interior annular pressure, because the hole condition complexity is various, the well interlayer pressure that has is uneven, interlayer water permeability difference is large, for this well, require packing can bear annular space, can bear lower annular space again.
Summary of the invention
In order to overcome the deficiency that exists in the background technology, the utility model provides a kind of large pressure reduction well packer capable of flushing well, and this packer has the characteristics reliable and stable, that have the interior pressure of dummy piston energy balance and annular space to press, can bear large pressure reduction that set.
The technical scheme that the utility model adopts is: this large pressure reduction well packer capable of flushing well comprises top connection, top connection is connected with central tube by internal thread, the central tube upper end is provided with inlet opening, top connection is connected with upper cylinder sleeve by external screw thread, upper inboard wall of cylinder liner is connected with the pilot cover by external screw thread, pilot has put axial liquid pass hole, liquid pass hole communicates with inlet opening, the pilot cover is connected with bushing pipe by external screw thread, bushing pipe top is distributed with at least 6 through holes, bushing pipe inwall and central tube outer wall are gapped, pilot cover below, spring and well-flushing piston are housed in the cavity between upper cylinder sleeve and the bushing pipe successively, at least 6 liquid holes are arranged at upper cylinder sleeve bottom, upper cylinder sleeve lower end is connected with upper jacket by internal thread, the bushing pipe outer wall cover of upper jacket below has the limit packing element, middle packing element and lower jacket, separate with spacer ring between packing element and the middle packing element, lower jacket by internal thread with set piston and be connected, set the piston middle part and be provided with at least 6 inlet openings, setting the piston lower end is connected with lower cylinder sleeve by external screw thread, on the inwall of lower cylinder sleeve middle part notched teeth is arranged, setting piston below is provided with fixed piston and is connected with the central tube external screw thread, fixed piston is connected with baffle ring by the deblocking pin, in the pit that fixed piston and baffle ring outer wall form lock ring is housed, inlet opening and balance inlet opening are arranged at the central tube bottom, the central tube lower end is connected with lower contact by external screw thread, lower cylinder sleeve lower end is connected with lower contact by setting pin, in the lower cylinder sleeve of lower contact top dummy piston is housed.
The beneficial effects of the utility model are: owing to adopt technique scheme, liquid pass hole and inlet opening and spring make the well-flushing piston seal reliable, make set more reliable.Sawtooth tooth locking in lock ring and the lower cylinder sleeve, interior pressure removes packer also can keep setting state.When annular pressure raises instantly, the gap of liquid by lower contact and lower cylinder sleeve lower end enter act on promote lower cylinder sleeve on the dummy piston, set piston, lower jacket further compresses packing element, it is more reliable to set performance.This packer setting is effective, and is time saving and energy saving, high efficiency.
Description of drawings:
Fig. 1 is the utility model structure sectional view.
The specific embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, this large pressure reduction well packer capable of flushing well comprises top connection 1, top connection 1 is connected with central tube 17 by internal thread, central tube 17 upper ends are provided with inlet opening 22, top connection 1 is connected with upper cylinder sleeve 2 by external screw thread, upper cylinder sleeve 2 inwalls are connected with pilot cover 3 by external screw thread, on the pilot cover 3 axial liquid pass hole 23 is arranged, liquid pass hole 23 communicates with inlet opening 22, pilot cover 3 is connected with bushing pipe 5 by external screw thread, bushing pipe 5 tops are distributed with at least 6 through holes 24, bushing pipe 5 inwalls and central tube 17 outer walls are gapped, pilot is overlapped 3 belows, spring 4 and well-flushing piston 6 are housed in the cavity between upper cylinder sleeve 2 and the bushing pipe 5 successively, at least 6 liquid holes 25 are arranged at upper cylinder sleeve 2 bottoms, upper cylinder sleeve 2 lower ends are connected with upper jacket 7 by internal thread, the bushing pipe 5 outer wall covers of upper jacket 7 belows have limit packing element 8, middle packing element 10 and lower jacket 11, separate with spacer ring 9 between packing element 8 and the middle packing element 10, lower jacket 11 by internal thread with set piston 12 and be connected, set piston 12 middle parts and be provided with at least 6 inlet openings, setting piston 12 lower ends is connected with lower cylinder sleeve 18 by external screw thread, on the lower cylinder sleeve 18 middle part inwalls notched teeth is arranged, setting piston 12 belows is provided with fixed piston 13 and is connected with central tube 17 external screw threads, fixed piston 13 is connected with baffle ring 16 by deblocking pin 15, in the pit that fixed piston 13 and baffle ring 16 outer walls form lock ring 14 is housed, inlet opening and balance inlet opening 26 are arranged at central tube 17 bottoms, central tube 17 lower ends are connected with lower contact 21 by external screw thread, lower cylinder sleeve 18 lower ends are connected with lower contact 21 by setting pin 20, in the lower cylinder sleeve 18 of lower contact 21 tops dummy piston 19 are housed.The gap of liquid hole 25, through hole 24, bushing pipe 5 inwalls and central tube 17 outer walls, the inlet opening that sets on the piston 12 form the well-flushing passage.Need sealing place to be provided with sealing ring in the such scheme.
In order to make the purpose that sealing between well-flushing piston 6 and the bushing pipe 5 can via hole, well-flushing piston 6 lower end inwalls are provided with annular groove, and sulfuration has rubber 27 in the annular groove.Caulking gum 27 is integrated with 6 sulfurations of well-flushing piston, and when via hole, caulking gum 27 can not come off, and guarantees sealing.
Packer setting: suppress in the central tube, the inlet opening of liquid by the central tube bottom promotes to set piston stroking upward, and it is up to set under the piston driving cylinder sleeve, makes to set pin and cut off, and drives lower jacket and makes packing element compression, packer setting.Liquid pass hole 23 makes 6 sealings of well-flushing piston reliable with inlet opening 22 and spring 4, make set more reliable.Sawtooth tooth locking in lock ring and the lower cylinder sleeve, interior pressure removes packer also can keep setting state.
When annular pressure raises instantly, the gap of liquid by lower contact and lower cylinder sleeve lower end enter act on promote lower cylinder sleeve on the dummy piston, set piston, lower jacket further compresses packing element, it is more reliable to set performance.
Well-flushing: annular space is suppressed on the packer, and the logical liquid pass hole 25 of liquid enters and promotes the well-flushing piston stroking upward, makes the well-flushing channel connection carry out well-flushing, well-flushing complete under the effect of spring well-flushing piston closed well washing passage again.
Removing seal for packer: the upper lifting pipe post, the deblocking pin is cut off packing element resilience, removing seal for packer under the opposition of fixed piston and baffle ring, lock ring.
Claims (4)
1. large pressure reduction well packer capable of flushing well, comprise top connection (1), it is characterized in that: top connection (1) is connected with central tube (17) by internal thread, central tube (17) upper end is provided with inlet opening (22), top connection (1) is connected with upper cylinder sleeve (2) by external screw thread, upper cylinder sleeve (2) inwall is connected with pilot cover (3) by external screw thread, axial liquid pass hole (23) is arranged on the pilot cover (3), liquid pass hole (23) communicates with inlet opening (22), pilot cover (3) is connected with bushing pipe (5) by external screw thread, bushing pipe (5) top is distributed with at least 6 through holes (24), bushing pipe (5) inwall and central tube (17) outer wall are gapped, pilot cover (3) below, spring (4) and well-flushing piston (6) are housed in the cavity between upper cylinder sleeve (2) and the bushing pipe (5) successively, at least 6 liquid holes (25) are arranged at upper cylinder sleeve (2) bottom, upper cylinder sleeve (2) lower end is connected with upper jacket (7) by internal thread, bushing pipe (5) the outer wall cover of upper jacket (7) below has limit packing element (8), middle packing element (10) and lower jacket (11), separate with spacer ring (9) between packing element (8) and the middle packing element (10), lower jacket (11) by internal thread with set piston (12) and be connected, set piston (12) middle part and be provided with at least 6 inlet openings, setting piston (12) lower end is connected with lower cylinder sleeve (18) by external screw thread, on the inwall of lower cylinder sleeve (18) middle part notched teeth is arranged, setting piston (12) below is provided with fixed piston (13) and is connected with central tube (17) external screw thread, fixed piston (13) is connected with baffle ring (16) by deblocking pin (15), in the pit that fixed piston (13) and baffle ring (16) outer wall form lock ring (14) is housed, inlet opening and balance inlet opening (26) are arranged at central tube (17) bottom, central tube (17) lower end is connected with lower contact (21) by external screw thread, lower cylinder sleeve (18) lower end is connected with lower contact (21) by setting pin (20), in the lower cylinder sleeve (18) of lower contact (21) top dummy piston (19) is housed.
2. large pressure reduction well packer capable of flushing well according to claim 1 is characterized in that: the gap of liquid hole (25), through hole (24), bushing pipe (5) inwall and central tube (17) outer wall, the inlet opening that sets on the piston (12) form the well-flushing passage.
3. large pressure reduction well packer capable of flushing well according to claim 1, it is characterized in that: well-flushing piston (6) lower end inwall is provided with annular groove, and sulfuration has rubber (27) in the annular groove.
4. large pressure reduction well packer capable of flushing well according to claim 1, it is characterized in that: sealing place is provided with sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220555547 CN202810775U (en) | 2012-10-28 | 2012-10-28 | Large-pressure-difference well-washing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220555547 CN202810775U (en) | 2012-10-28 | 2012-10-28 | Large-pressure-difference well-washing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202810775U true CN202810775U (en) | 2013-03-20 |
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ID=47869673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220555547 Expired - Lifetime CN202810775U (en) | 2012-10-28 | 2012-10-28 | Large-pressure-difference well-washing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202810775U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563946A (en) * | 2013-10-29 | 2015-04-29 | 中国石油天然气股份有限公司 | Step-by-step unblocking packer for multilayer separate injection well |
| CN104653144A (en) * | 2013-11-19 | 2015-05-27 | 中国石油天然气股份有限公司 | Compression packer for washable wells with large pressure difference for oil wells |
| CN110847846A (en) * | 2020-01-15 | 2020-02-28 | 山东博赛特石油技术有限公司 | Well washing protection integrated packer and method |
| CN111075385A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Single-pipe double-control safe well-flushing packer |
| CN112302566A (en) * | 2020-10-27 | 2021-02-02 | 大庆泰泽机械加工有限公司 | Packer for controlling setting of air balance cavity |
-
2012
- 2012-10-28 CN CN 201220555547 patent/CN202810775U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104563946A (en) * | 2013-10-29 | 2015-04-29 | 中国石油天然气股份有限公司 | Step-by-step unblocking packer for multilayer separate injection well |
| CN104653144A (en) * | 2013-11-19 | 2015-05-27 | 中国石油天然气股份有限公司 | Compression packer for washable wells with large pressure difference for oil wells |
| CN111075385A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Single-pipe double-control safe well-flushing packer |
| CN111075385B (en) * | 2018-10-22 | 2022-01-25 | 中国石油化工股份有限公司 | Single-pipe double-control safe well-flushing packer |
| CN110847846A (en) * | 2020-01-15 | 2020-02-28 | 山东博赛特石油技术有限公司 | Well washing protection integrated packer and method |
| CN112302566A (en) * | 2020-10-27 | 2021-02-02 | 大庆泰泽机械加工有限公司 | Packer for controlling setting of air balance cavity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130320 |