CN108625816B - Gravity hydraulic combined double-seal packer - Google Patents
Gravity hydraulic combined double-seal packer Download PDFInfo
- Publication number
- CN108625816B CN108625816B CN201810507504.0A CN201810507504A CN108625816B CN 108625816 B CN108625816 B CN 108625816B CN 201810507504 A CN201810507504 A CN 201810507504A CN 108625816 B CN108625816 B CN 108625816B
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- hydraulic
- central pipe
- backwashing
- hydraulic cylinder
- central tube
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- 230000005484 gravity Effects 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000004873 anchoring Methods 0.000 claims abstract description 9
- 238000011001 backwashing Methods 0.000 claims description 39
- 238000003825 pressing Methods 0.000 claims description 25
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims 4
- 230000009977 dual effect Effects 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 238000005406 washing Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention belongs to the technical field of oil exploitation downhole tools, and particularly relates to a gravity hydraulic combined double-seal packer. The gravity hydraulic combined double-seal packer comprises an integral central pipe, wherein an upper outer central pipe is arranged outside the upper part of the integral central pipe, a lower outer central pipe is arranged outside the lower part of the integral central pipe, a liquid channel is reserved between the upper outer central pipe and the lower outer central pipe and between the upper outer central pipe and the integral central pipe, and the upper outer central pipe and the lower outer central pipe are connected through a connector; the upper end of the integral central tube is connected with an anchoring mechanism, and the lower end of the integral central tube is connected with a lower joint through a supporting mechanism. The packer can realize the complementation of gravity and hydraulic setting, realize double-stage sealing and step decomposition of pressure difference, thereby improving the overall pressure-bearing grade.
Description
Technical Field
The invention belongs to the technical field of oil exploitation downhole tools, and particularly relates to a gravity hydraulic combined double-seal packer.
Background
The oil well casing causes the leakage phenomenon of the casing due to the reasons of well cementation quality, connecting threads, stratum movement, corrosion and the like, and brings adverse factors to the construction of oil well measures and influences the crude oil yield. Once the non-producing layer of the oil well is in a leakage state, the packer is generally adopted for sealing and then repairing, the setting and sealing mechanism of the packer at present is basically in a single mode, either the sealing element is radially inflated by compressing the sealing element, or the sealing element is inserted in a wedging mode to radially inflate the sealing element, and a cavity is directly formed inside the sealing element, and expandable chemical agent is filled in the cavity and expands to radially inflate the sealing element; the seal is also a single compression, wedging, or metal expansion. However, with the requirement of on-site production, particularly the ultra-deep track abrupt well has the problems that the pressure weight loss is caused by the bending of the tubing string and the huge friction generated on the inner wall of the casing after the slips are supported, the setting load cannot meet the requirement, the local unsealing caused by the casing damage is caused, and the like. Conventional single setting, sealing or structural designs have failed to meet the requirements of on-site production for packers.
Disclosure of Invention
The invention aims to provide a gravity-hydraulic combined double-seal packer aiming at the problems in the prior art, which can realize the complementation of gravity and hydraulic setting, realize double-stage sealing and step decomposition of pressure difference, thereby improving the overall pressure bearing grade.
The technical scheme of the invention is as follows:
the gravity hydraulic combined double-seal packer comprises an integral central pipe, wherein an upper outer central pipe is arranged outside the upper part of the integral central pipe, a lower outer central pipe is arranged outside the lower part of the integral central pipe, a liquid channel is reserved between the upper outer central pipe and the lower outer central pipe and between the upper outer central pipe and the integral central pipe, and the upper outer central pipe and the lower outer central pipe are connected through a connector; the upper end of the integral central tube is connected with an anchoring mechanism, and the lower end of the integral central tube is connected with a lower joint through a supporting mechanism.
The anchoring mechanism comprises a hydraulic anchor body, wherein a pressing strip is arranged outside the hydraulic anchor body, a cavity is formed between the pressing strip and the hydraulic anchor body, the upper end of the pressing strip is fixedly arranged on the hydraulic anchor body through a pressing strip ring, and a plurality of anchor tooth assemblies are arranged in the cavity between the pressing strip and the hydraulic anchor body.
The upper outer central tube is simultaneously connected with the lower end of the hydraulic anchor body and the lower end of the pressing strip through a backwashing outer sleeve, a backwashing liquid inlet hole is formed in the backwashing outer sleeve, a cavity is reserved between the backwashing outer sleeve and the integral central tube, a well flushing spring is arranged in the cavity, and a backwashing piston is arranged at the lower end of the well flushing spring.
The lower end of the backwashing jacket is provided with a hydraulic cylinder assembly, the hydraulic cylinder assembly is connected with a connector, an upper rubber cylinder is arranged between the backwashing jacket and the hydraulic cylinder assembly, the lower end of the connector is provided with a connecting cap, the lower end of the connecting cap is provided with a cone connecting sleeve, the cone connecting sleeve is in threaded connection with a cone, a lower rubber cylinder is arranged between the connecting cap and the cone connecting sleeve, the cone is fixed on the outside of the integral central tube, the hydraulic cylinder assembly and the upper rubber cylinder are positioned on the outside of the upper outer central tube, and the connecting cap and the lower rubber cylinder are positioned on the outside of the lower outer central tube; at least two liquid inlet channels are arranged on the lower outer central tube; the liquid inlet channel is positioned on the lower outer central tube and corresponds to the position of the hydraulic cylinder assembly.
The supporting mechanism comprises a spiral hanger connected with the lower connector, and further comprises a friction body connected with the upper end of the spiral hanger, wherein the upper end of the friction body is connected with a friction block, the upper end of the friction block is fixedly connected with a clamping tooth through a pin, the clamping tooth is fixed outside the integral central tube, the clamping tooth is located below a cone, and a pressure reducing liquid inlet is formed in the cone.
Specifically, the anchor tooth subassembly constitute by a fixed spring of anchor tooth, the anchor tooth subassembly in total eight groups, a layering in have four sets of anchor tooth subassemblies, adjacent anchor tooth subassembly in four sets of anchor tooth subassemblies is 90 degrees settings, layering 4 have two, pass through solid fixed ring fixed connection between two layering.
Specifically, the well-flushing spring is disposed against the backwash piston.
Specifically, the pneumatic cylinder subassembly includes pneumatic cylinder and lower pneumatic cylinder, last pneumatic cylinder and lower pneumatic cylinder threaded connection, go up the pneumatic cylinder and go up the clearance between the outer center tube and set up the piston in, the piston is setting up on the pneumatic cylinder.
Specifically, the layering ring is fixedly connected with the hydraulic anchor body through a stable nail.
Specifically, the upper end of the upper rubber cylinder is provided with a protective bowl, and the upper end of the lower rubber cylinder is provided with a protective bowl.
Specifically, an adjusting ring is arranged between the cone connecting sleeve and the cone.
Specifically, the anchor teeth and the hydraulic anchor body are provided with O-shaped sealing rings; an O-shaped sealing ring is arranged between the backwashing piston and the backwashing jacket; an O-shaped sealing ring is arranged between the backwashing outer sleeve and the upper outer central tube; an O-shaped sealing ring is arranged between the piston and the upper hydraulic cylinder; an O-shaped sealing ring is arranged between the lower hydraulic cylinder and the upper outer central tube and between the lower hydraulic cylinder and the connector.
Specifically, the upper end of the lower joint is provided with a second pin for spiral hanging and screwing.
The beneficial effects of the invention are as follows: the double-sealing packer can solve the problems that after the slips support, the tubing string bends and generates huge friction with the inner wall of the casing to cause weight loss, the setting load cannot meet the requirement, the casing is damaged to cause local unsealing and the like in an ultra-deep track abrupt well. The gravity and hydraulic setting complementation can be realized, the multipoint sealing is realized, and the pressure difference is decomposed in steps, so that the overall bearing grade is improved. The double-seal packer provided by the invention has the advantages that even if the hydraulic rubber cylinder is damaged, the gravity setting part can work independently. In addition, the lower end of the pipe column is not required to be sealed, the rubber cylinder can be compressed to be seated through the liquid pressure difference of the self-sealing resume of the tool, accessories such as a cut-off device and a constant pressure valve are omitted, and the pipe column structure is simplified. The invention can be repeatedly set.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The hydraulic anchor body 1, the pressing strip ring 2, the stable nail 3, the pressing strip 4, the anchor tooth 5, the spring 6, the sealing ring 7O, the fixed ring 8, the backwashing jacket 9, the flushing spring 10, the integral central tube 11, the backwashing piston 12, the backwashing liquid inlet 13, the upper central tube 14, the upper central tube 15, the protective bowl 16, the upper rubber cylinder 17, the lower central tube 18, the upper hydraulic cylinder 19, the lower hydraulic cylinder 20, the connector 21, the connecting cap 22, the lower rubber cylinder 23, the cone connecting sleeve 24, the adjusting ring 25, the liquid passage 26, the cone 27, the clamping tooth 28, the pin one 29, the friction block 30, the friction body 31, the spiral hanger 32, the pin two 33 and the lower connector 34.
Detailed Description
The structure schematic diagram of the gravity hydraulic combined double-seal packer provided by the invention is shown in fig. 1, and the gravity hydraulic combined double-seal packer comprises an integral central pipe 11, wherein an upper outer central pipe 14 is arranged outside the upper part of the integral central pipe 11, a lower outer central pipe 17 is arranged outside the lower part of the integral central pipe 11, liquid channels are reserved between the upper outer central pipe 14, the lower outer central pipe 17 and the integral central pipe 11, and the upper outer central pipe 14 and the lower outer central pipe 17 are connected through a connector 21; the upper end of the integral central tube 11 is connected with an anchoring mechanism, and the lower end is connected with a lower joint 34 through a supporting mechanism.
The anchoring mechanism comprises a hydraulic anchor body 1, a pressing strip 4 is arranged outside the hydraulic anchor body 1, a cavity is formed between the pressing strip 4, the upper end of the pressing strip 4 is fixedly arranged on the hydraulic anchor body 1 through a pressing strip ring 2, and the pressing strip ring 2 is fixedly connected with the hydraulic anchor body 1 through a stable nail 3. A plurality of anchor tooth assemblies are arranged in a cavity between each pressing strip 4 and the hydraulic anchor body 1, each anchor tooth assembly is formed by fixing one spring 6 by one anchor tooth 5, eight groups of anchor tooth assemblies are arranged in each pressing strip 4, each adjacent anchor tooth assembly in the four groups of anchor tooth assemblies is arranged at 90 degrees, and two pressing strips 4 are fixedly connected through a fixing ring 8.
The upper outer central tube 14 is simultaneously connected with the lower end of the hydraulic anchor body 1 and the lower end of the pressing strip 4 through the backwashing outer sleeve 9, backwashing liquid inlet holes 13 are formed in the backwashing outer sleeve 9, a cavity is reserved between the backwashing outer sleeve 9 and the integral central tube 11, a well washing spring 10 is arranged in the cavity, a backwashing piston 12 is arranged at the lower end of the well washing spring 10, and the well washing spring 10 is arranged against the backwashing piston 12.
The lower end of the backwashing outer sleeve 9 is provided with a hydraulic cylinder assembly, the hydraulic cylinder assembly is connected with a connector 21, an upper rubber cylinder 16 is arranged between the backwashing outer sleeve 9 and the hydraulic cylinder assembly, the upper end of the upper rubber cylinder 16 is provided with a protective bowl 15, the lower end of the connector 21 is provided with a connecting cap 22, the lower end of the connecting cap 22 is provided with a cone connecting sleeve 24, the cone connecting sleeve 24 is in threaded connection with a cone 27, an adjusting ring 25 is arranged between the cone connecting sleeve 24 and the cone 27, a lower rubber cylinder 23 is arranged between the connecting cap 22 and the cone connecting sleeve 24, the cone 27 is fixed outside the integral central tube 11, the hydraulic cylinder assembly and the upper rubber cylinder 16 are positioned outside the upper outer central tube 14, and the connecting cap 22 and the lower rubber cylinder 23 are positioned outside the lower outer central tube 17; the hydraulic cylinder assembly comprises an upper hydraulic cylinder 18 and a lower hydraulic cylinder 20, the upper hydraulic cylinder 18 and the lower hydraulic cylinder 20 are in threaded connection, a piston 19 is arranged in a gap between the upper hydraulic cylinder 18 and the upper outer central tube 14, and the piston 19 is arranged against the upper hydraulic cylinder 18. Two liquid inlet channels are arranged on the lower outer central tube 17; one liquid inlet channel is positioned on the lower outer central tube 17 at a position corresponding to the upper hydraulic cylinder 18, and the other liquid inlet channel is positioned on the lower outer central tube 17 at a position corresponding to the lower hydraulic cylinder 20;
the supporting mechanism comprises a spiral hanger 32 connected with a lower connector 34, and a second pin 33 for the spiral hanger 32 to hang is arranged at the upper end of the lower connector 34. The novel spiral hanger further comprises a friction body 31 connected with the upper end of the spiral hanger 32, the upper end of the friction body 31 is connected with a friction block 30, the upper end of the friction block 30 is fixedly connected with a clamping tooth 28 through a pin 29, the clamping tooth 28 is fixedly connected with the outside of the integral central tube 11, the clamping tooth 28 is located below the cone 27, and a liquid passing channel 26 is formed in the cone 27.
According to the sealing requirement, the anchor teeth 5 and the hydraulic anchor body 1 are provided with O-shaped sealing rings 7; an O-shaped sealing ring is arranged between the backwashing piston 12 and the backwashing outer sleeve 9; an O-shaped sealing ring is arranged between the backwashing outer sleeve 9 and the upper outer central tube 14; an O-shaped sealing ring is arranged between the piston 19 and the upper hydraulic cylinder 18; an O-shaped sealing ring is arranged between the lower hydraulic cylinder 20 and the upper outer central tube 14 as well as between the lower hydraulic cylinder and the connector 21.
The working process of the gravity hydraulic combined double-seal packer provided by the invention is as follows:
setting process: lifting up after the packer is lowered to a preset depth, rotating, lowering and releasing the supporting mechanism, compressing the lower rubber cylinder 23 to seal, then pressing the packer positively from an oil pipe, leading liquid to a certain degree through the liquid passage 26 on the lower cone 27 and the liquid passage between the lower outer central pipe 17 and the integral central pipe 11 through the liquid through holes on the adjusting ring 25, pushing the hydraulic cylinder assembly to move upwards by hydraulic pressure, firstly pushing the lower hydraulic cylinder 20 by hydraulic pressure, leading the liquid to enter the lower outer central pipe 17 through the liquid inlet passage on the lower outer central pipe 17, leading the liquid to enter the upper hydraulic cylinder 18 through the other liquid inlet passage, thereby pushing the upper hydraulic cylinder 18 to compress the upper rubber cylinder 16 and the anchoring mechanism, anchoring the pipe column, and realizing double-stage sealing.
And (3) backwashing: without unsealing, liquid on the upper part of the sleeve can enter through a backwashing liquid inlet hole 13 on the backwashing outer sleeve 9, the backwashing piston 10 is hydraulically pushed to move upwards, the liquid enters a liquid channel between the upper outer central pipe 14 and the lower outer central pipe 17 and the integral central pipe 11, bypasses a sealing section, then enters an oil pipe from the bottom of the pipe column to finish backwashing, the backwashing piston 10 is arranged against a well washing spring 10, and the well washing spring 10 has the function of helping the backwashing piston 10 to reset under the condition of no well washing.
And (3) deblocking process: the oil pipe is lifted up, and the gravity hydraulic combined double-seal packer provided by the invention can be repeatedly set.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present invention and are not limiting; while the invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present invention or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the invention, it is intended to cover the scope of the invention as claimed.
Claims (9)
1. The gravity hydraulic combined double-seal packer comprises an integral central pipe (11), wherein an upper outer central pipe (14) is arranged outside the upper part of the integral central pipe (11), a lower outer central pipe (17) is arranged outside the lower part of the integral central pipe, a liquid channel is reserved between the upper outer central pipe (14) and the lower outer central pipe (17) and the integral central pipe (11), and the upper outer central pipe (14) and the lower outer central pipe (17) are connected through a connector (21); the upper end of the integral central tube (11) is connected with an anchoring mechanism, the lower end of the integral central tube is connected with a lower joint (34) through a supporting mechanism, and the hydraulic anchor is characterized in that the anchoring mechanism comprises a hydraulic anchor body (1), a pressing strip (4) is arranged outside the hydraulic anchor body (1) and is provided with a cavity therebetween, the upper end of the pressing strip (4) is fixedly arranged on the hydraulic anchor body (1) through a pressing strip ring (2), and a plurality of anchor tooth assemblies are arranged in the cavity between the pressing strip (4) and the hydraulic anchor body (1);
the upper outer central tube (14) is simultaneously connected with the lower end of the hydraulic anchor body (1) and the lower end of the pressing strip (4) through a backwashing outer sleeve (9), a backwashing liquid inlet hole (13) is formed in the backwashing outer sleeve (9), a cavity is reserved between the backwashing outer sleeve (9) and the integral central tube (11), a well flushing spring (10) is arranged in the cavity, and a backwashing piston (12) is arranged at the lower end of the well flushing spring (10);
the lower extreme of backwash overcoat (9) be provided with the pneumatic cylinder subassembly, the pneumatic cylinder subassembly is connected with connector (21), backwash overcoat (9) be provided with between the pneumatic cylinder subassembly and go up packing element (16), the lower extreme of connector (21) set up connecting cap (22), the lower extreme of connecting cap (22) sets up cone adapter sleeve (24), cone adapter sleeve (24) and cone (27) threaded connection, be provided with down packing element (23) between connecting cap (22) and cone adapter sleeve (24), cone (27) fix in the outside of whole center tube (11), pneumatic cylinder subassembly and go up packing element (16) be located the outside of outer center tube (14), connecting cap (22) and lower packing element (23) be located the outside of outer center tube (17) down; at least two liquid inlet channels are arranged on the lower outer central tube (17); the liquid inlet channel is positioned on the lower outer central tube (17) at a position corresponding to the position of the hydraulic cylinder assembly;
the supporting mechanism comprises a spiral hanger (32) connected with a lower connector (34), and further comprises a friction body (31) connected with the upper end of the spiral hanger (32), wherein the upper end of the friction body (31) is connected with a friction block (30), the upper end of the friction block (30) is fixedly connected with a clamping tooth (28) through a pin I (29), the clamping tooth (28) is fixedly connected with the outside of the integral central tube (11), the clamping tooth (28) is located below a cone body (27), and a liquid passing channel (26) is formed in the cone body (27).
2. The gravity hydraulic combined double-sealing packer according to claim 1, wherein the anchor tooth assembly is formed by fixing one spring (6) by one anchor tooth (5), eight groups of anchor tooth assemblies are arranged in one pressing strip (4), four groups of anchor tooth assemblies are arranged in the four groups of anchor tooth assemblies at 90 degrees, two pressing strips (4) are fixedly connected through a fixing ring (8).
3. The gravity hydraulic combination dual seal packer according to claim 1, characterized in that a flushing spring (10) is arranged against the backwash piston (12).
4. The gravity hydraulic combined double-seal packer according to claim 1, wherein the hydraulic cylinder assembly comprises an upper hydraulic cylinder (18) and a lower hydraulic cylinder (20), the upper hydraulic cylinder (18) and the lower hydraulic cylinder (20) are in threaded connection, a piston (19) is arranged in a gap between the upper hydraulic cylinder (18) and the upper outer central tube (14), and the piston (19) is arranged against the upper hydraulic cylinder (18).
5. The gravity hydraulic combined double-seal packer according to claim 1, wherein the layering ring (2) is fixedly connected with the hydraulic anchor body (1) through the stabilizing nails (3).
6. The gravity hydraulic combined double-seal packer according to claim 1, wherein a protective bowl (15) is arranged at the upper end of the upper rubber cylinder (16), and a protective bowl (15) is arranged at the upper end of the lower rubber cylinder (23).
7. The gravity hydraulic combined double-sealing packer according to claim 1, characterized in that an adjusting ring (25) is arranged between the cone connecting sleeve (24) and the cone (27).
8. The gravity hydraulic combined double-sealing packer according to claim 4 is characterized in that an O-shaped sealing ring (7) is arranged between the anchor teeth (5) and the hydraulic anchor body (1); an O-shaped sealing ring is arranged between the backwashing piston (12) and the backwashing outer sleeve (9); an O-shaped sealing ring is arranged between the backwashing outer sleeve (9) and the upper outer central tube (14); an O-shaped sealing ring is arranged between the piston (19) and the upper hydraulic cylinder (18); an O-shaped sealing ring is arranged between the lower hydraulic cylinder (20) and the upper outer central tube (14) as well as between the lower hydraulic cylinder and the connector (21).
9. The gravity hydraulic combined double-seal packer according to claim 1, wherein a second pin (33) for screwing the screw hanger (32) is arranged at the upper end of the lower joint (34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810507504.0A CN108625816B (en) | 2018-05-24 | 2018-05-24 | Gravity hydraulic combined double-seal packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810507504.0A CN108625816B (en) | 2018-05-24 | 2018-05-24 | Gravity hydraulic combined double-seal packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108625816A CN108625816A (en) | 2018-10-09 |
| CN108625816B true CN108625816B (en) | 2024-03-26 |
Family
ID=63690411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810507504.0A Active CN108625816B (en) | 2018-05-24 | 2018-05-24 | Gravity hydraulic combined double-seal packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108625816B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111395990B (en) * | 2020-05-21 | 2021-03-09 | 东营市金旺石油机械制造有限公司 | Packer |
| CN115234191B (en) * | 2022-07-25 | 2024-04-16 | 中国石油化工股份有限公司 | Double-sealing anti-withdrawing packer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5413180A (en) * | 1991-08-12 | 1995-05-09 | Halliburton Company | One trip backwash/sand control system with extendable washpipe isolation |
| CN203783522U (en) * | 2014-05-05 | 2014-08-20 | 克拉玛依市红都有限责任公司 | Blockage and peristalsis preventing well flushing hook wall packer |
| CN105317394A (en) * | 2014-06-26 | 2016-02-10 | 天津市正瀚石油设备制造有限公司 | High-temperature-resistant and high-pressure-bearing packer special for oil drilling |
| CN205422653U (en) * | 2016-03-18 | 2016-08-03 | 中国石油化工股份有限公司 | Multi -functional oil pipe post of taking out |
| CN205445525U (en) * | 2015-12-22 | 2016-08-10 | 中国石油天然气股份有限公司 | Formula of can salvaging pressure shutoff instrument in pit |
| CN208502725U (en) * | 2018-05-24 | 2019-02-15 | 濮阳市科锐机械工程技术有限公司 | A kind of gravity hydraulic combined type double density sealed packer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2392697B (en) * | 2001-12-12 | 2006-07-12 | Weatherford Lamb | Bi-directional and internal pressure trapping packing element system |
| US6810958B2 (en) * | 2001-12-20 | 2004-11-02 | Halliburton Energy Services, Inc. | Circulating cementing collar and method |
-
2018
- 2018-05-24 CN CN201810507504.0A patent/CN108625816B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5413180A (en) * | 1991-08-12 | 1995-05-09 | Halliburton Company | One trip backwash/sand control system with extendable washpipe isolation |
| CN203783522U (en) * | 2014-05-05 | 2014-08-20 | 克拉玛依市红都有限责任公司 | Blockage and peristalsis preventing well flushing hook wall packer |
| CN105317394A (en) * | 2014-06-26 | 2016-02-10 | 天津市正瀚石油设备制造有限公司 | High-temperature-resistant and high-pressure-bearing packer special for oil drilling |
| CN205445525U (en) * | 2015-12-22 | 2016-08-10 | 中国石油天然气股份有限公司 | Formula of can salvaging pressure shutoff instrument in pit |
| CN205422653U (en) * | 2016-03-18 | 2016-08-03 | 中国石油化工股份有限公司 | Multi -functional oil pipe post of taking out |
| CN208502725U (en) * | 2018-05-24 | 2019-02-15 | 濮阳市科锐机械工程技术有限公司 | A kind of gravity hydraulic combined type double density sealed packer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108625816A (en) | 2018-10-09 |
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