CN115613995A - Multi-stage low-pressure driven double-working-flow-channel packer - Google Patents
Multi-stage low-pressure driven double-working-flow-channel packer Download PDFInfo
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- CN115613995A CN115613995A CN202211616106.5A CN202211616106A CN115613995A CN 115613995 A CN115613995 A CN 115613995A CN 202211616106 A CN202211616106 A CN 202211616106A CN 115613995 A CN115613995 A CN 115613995A
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- tube
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- 230000005540 biological transmission Effects 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims description 18
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- 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
- E21B33/122—Multiple string packers
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- 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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to the technical field of packers, in particular to a multi-stage low-pressure driven double-working-flow-channel packer which comprises a central tube, wherein the central tube is of a double-layer structure with an annular flow channel, and the outer side of the central tube is sequentially provided with a connecting tube, a rubber cylinder group, a multi-stage hydraulic group and a clamp spring sleeve from top to bottom; the invention creatively utilizes the pressure in the well as the setting power, and then is matched with the structure of the multi-stage pressure cavity to provide multi-stage pressure matching under the low-pressure driving so as to realize the setting mode of short-distance pressure transmission and low-pressure driving, which is a revolutionary improvement of the high-pressure and long-distance pressure transmission and setting mode in the well by adopting the ground at present, and in addition, the invention has double working flow channels after the setting is finished so as to ensure the requirement of double-channel operation.
Description
Technical Field
The invention relates to the technical field of packers, in particular to a multi-stage low-pressure driven double-working-flow-channel packer.
Background
The packer is an important downhole tool in the development process of oil and gas fields, is used for sealing and isolating oil, gas and water layers in a casing, and realizes layered injection and production, testing and special operation.
The packer can be divided into various types according to different bottom supporting modes, setting modes, deblocking modes and the like, is applied to different water injection or oil extraction and gas production wells, and particularly can be synchronously injected and produced through double flow channels after being set.
However, the conventional packer can only be driven by means of well head pressurization, and the difference between the well head and the designed depth of the packer is far, so that the packer can be set only by high well head pressure, the long-distance pressure transmission pressure is unstable, and the pressure is easily relieved in gaps among all connecting parts, so that the setting is difficult or the setting is invalid.
Disclosure of Invention
The invention aims to provide a multistage low-pressure driven double-working-flow-channel packer, which utilizes the pressure in a well as the setting power in an initiative manner, is matched with the structure of a multistage pressure cavity, provides multistage pressure matching under the low-pressure driving manner, realizes the setting mode of short-distance pressure transmission and low-pressure driving, is a revolutionary improvement of the conventional high-pressure and long-distance conveying pressing setting mode in the well by adopting the ground, and is provided with double working flow channels after the setting is finished so as to ensure the requirement of double-channel operation.
The technical scheme of the invention is as follows:
a multi-stage low-voltage driven double-working flow passage packer comprises a central tube, wherein the central tube is of a double-layer structure with an annular flow passage, and the outer side of the central tube is sequentially provided with a connecting tube, a rubber cylinder group, a multi-stage hydraulic group and a clamp spring sleeve from top to bottom;
the multistage hydraulic unit comprises a plurality of sliding pistons connected on the peripheral surface of the central pipe in a sliding and sealing mode and sliding sleeves, and two ends of each sliding sleeve are connected on the peripheral surfaces of two adjacent sliding pistons respectively;
a positioning sleeve is fixedly arranged between two adjacent sliding pistons on the outer peripheral surface of the central tube, the outer peripheral surface of the positioning sleeve is in sliding sealing fit with the inner peripheral surface of the sliding sleeve, and a first pressure transmission gap is formed between the top of the positioning sleeve and the adjacent sliding piston;
the bottom of the outer peripheral surface of the central tube is provided with an annular step, a second pressure transmission gap is arranged between the top of the annular step and the adjacent sliding piston, and the central tube is respectively provided with a bridge type pressure guide channel for communicating the inner cavity of the central tube with the first pressure transmission gap and the second pressure transmission gap;
the clamp spring sleeve is arranged on the outer side of the annular step in a sliding sealing mode, the top of the clamp spring sleeve is connected with the adjacent sliding piston, a shearing pin is arranged between the clamp spring sleeve and the annular step, a clamping groove part is formed in the inner circumferential surface of the clamp spring sleeve, and a clamp spring matched with the clamping groove part is arranged on the outer circumferential surface of the annular step.
Preferably, the central tube comprises an inner tube body and an outer tube body, and a plurality of spacers are connected between the inner tube body and the outer tube body.
Preferably, the bridge pressure guide channel is a communication hole correspondingly formed in the inner pipe body, the spacer block and the outer pipe body.
Preferably, the bottom of the central tube is connected with a lower connector for plugging the bottom of the annular flow channel, and the lower end of the outer tube body is provided with a side hole communicated with the annular flow channel.
Preferably, the top of the central tube and the top of the connecting tube are connected with an upper joint, and a bypass flow passage communicated with an annular flow passage of the central tube is formed in the wall of the upper joint.
Preferably, the clamping groove part protrudes out of the inner circumferential surface of the clamping spring sleeve, and the upper end of the clamping groove part is of a slope-shaped structure.
Preferably, the rubber cylinder group comprises a middle rubber cylinder and edge rubber cylinders distributed on two sides of the middle rubber cylinder.
Preferably, a spacer ring is arranged between the middle rubber cylinder and the side rubber cylinder.
Compared with the prior art, the invention has the following advantages:
the invention creatively utilizes the pressure in the well as setting power, and then cooperates with the structure of the multi-stage pressure cavity to provide multi-stage pressure fit under the drive of low pressure so as to realize the setting mode of short-distance pressure transmission and low-pressure drive, which is a revolutionary improvement of the high-pressure and long-distance pressure transmission and setting mode in the well by adopting the ground at present.
The invention has compact and reasonable structure, can have double working flow passages while designing a multi-stage hydraulic group so as to meet the requirement of synchronous operation of injection and production, and has the advantages that the size of a well head is fixed when the device is applied, and the compact structure is designed in a downhole tool with the same outer diameter and also has a relatively larger drift diameter, thereby improving the working efficiency.
Drawings
FIG. 1 is a schematic view of the upper structure of the present invention;
FIG. 2 is a schematic view of the lower structure of the present invention;
FIG. 3 is a schematic cross-sectional view of a center tube;
FIG. 4 is a schematic structural view of a clamp spring sleeve;
in the figure: 1. the pressure-transmitting device comprises an upper connector, 2, a bypass flow channel, 3, a central pipe, 4, a connecting pipe, 5, an edge rubber cylinder, 6, a spacer ring, 7, a middle rubber cylinder, 8, a sliding piston, 9, a positioning sleeve, 10, a sliding sleeve, 11, a clamp spring, 12, a clamp spring sleeve, 13, a lower connector, 14, a rubber cylinder group, 15, a shearing pin, 16, a bridge pressure-transmitting channel, 17, a first pressure-transmitting gap, 18, a second pressure-transmitting gap, 19, an annular step, 20, a clamping groove part, 21, a side hole, 22, an annular flow channel, 23, an outer pipe body, 24, an inner pipe body, 25, a spacer block, 26, a slope-shaped structure, 27 and a groove.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
Example 1
Referring to fig. 1 to 4, a multi-stage low-pressure driven dual-working flow channel packer comprises a central tube 3, wherein the central tube 3 is a double-layer structure formed by combining an inner tube body 24 and an outer tube body 23, an annular flow channel 22 is formed between the inner tube body 24 and the outer tube body 23, and a plurality of spacer blocks 25 are connected between the inner tube body 24 and the outer tube body 23.
The outside of center tube 3 is equipped with connecting pipe 4, packing element group 14, multistage hydraulic pressure group and jump ring cover 12 from top to bottom in proper order.
The multistage hydraulic group comprises a plurality of sliding pistons 8 which are connected on the peripheral surface of the central tube 3 in a sliding and sealing way, and sliding sleeves 10 of which the two ends are respectively connected on the peripheral surfaces of two adjacent sliding pistons 8.
A positioning sleeve 9 is fixedly arranged between two adjacent sliding pistons 8 on the outer peripheral surface of the central tube 3, the outer peripheral surface of the positioning sleeve 9 is in sliding sealing fit with the inner peripheral surface of the sliding sleeve 10, and a first pressure transmission gap 17 is arranged between the top of the positioning sleeve 9 and the adjacent sliding piston 8.
The bottom of the outer peripheral surface of the central tube 3 is provided with an annular step 19, a second pressure transmission gap 18 is arranged between the top of the annular step 19 and the adjacent sliding piston 8, and the central tube 3 is respectively provided with a bridge type pressure guide channel 16 which communicates the inner cavity of the central tube 3 with the first pressure transmission gap 17 and the second pressure transmission gap 18.
The bridge pressure guide channel 16 may be a communication hole formed in the inner tube 24, the spacer 25, and the outer tube 23, or a conduit welded between the inner tube 24 and the outer tube 23.
The snap spring sleeve 12 is sleeved outside the annular step 19 in a sliding and sealing manner, the top of the snap spring sleeve 12 is connected with the adjacent sliding piston 8, a snap groove part 20 is arranged on the inner circumferential surface of the snap spring sleeve 12, and a snap spring 11 matched with the snap groove part 20 is arranged on the outer circumferential surface of the annular step 19.
Further, a shear pin 15 is provided between the snap spring sleeve 12 and the annular step 19, and the positions of the snap spring sleeve 12, the slide piston 8, and the slide sleeve 10 are fixed in advance by the shear pin 15, thereby forming the first pressure transmission gap 17 and the second pressure transmission gap 18.
Example 2
The embodiment is further optimized on the basis of embodiment 1, and specifically comprises the following steps:
the bottom of the central tube 3 is connected with a lower connector 13 for plugging the bottom of the annular flow passage 22, and the lower end of the outer tube 23 is provided with a side hole 21 communicated with the annular flow passage 22.
The top of the central tube 3 and the top of the connecting tube 4 are connected with an upper joint 1, and the wall of the upper joint 1 is provided with a bypass flow passage 2 communicated with an annular flow passage 22 of the central tube 3.
The invention is convenient to be installed on a working string in series by adding the upper connector 1 and the lower connector 13, and an oil way working channel for oil in a well to enter an annular flow passage 22 from the side hole 21 and to be discharged out of the device through the bypass flow passage 2 is formed.
Example 3
The embodiment is further optimized on the basis of embodiment 1, and specifically comprises the following steps:
the snap groove portion 20 protrudes from the inner circumferential surface of the snap spring housing 12, and the upper end of the snap groove portion 20 has a slope 26.
Through the structural design, when the snap spring sleeve 12 moves upwards after breaking the shearing pin 15, the slope-shaped structure 26 at the upper end of the clamping groove part 20 contacts the snap spring 11 firstly and presses the snap spring 11 to elastically contract, the clamping groove part 20 continues to move upwards, and when the snap spring 11 corresponds to the groove 27 on the clamping groove part 20, the snap spring 11 elastically resets and extends into the groove 27 to lock the position of the snap spring sleeve 12.
This structural design can make jump ring 11 be the state of not atress before the setting state with set after the state to improve the setting stability, and increase jump ring 11's life.
Example 4
The embodiment is further optimized on the basis of embodiment 1, and specifically comprises the following steps:
the glue cylinder group 14 comprises a middle glue cylinder 7 and edge glue cylinders 5 distributed on two sides of the middle glue cylinder 7.
A spacer ring 6 is arranged between the middle rubber cylinder 7 and the side rubber cylinder 5.
Through the design of multiunit packing element and spacer ring 6, increase packing element and pit shaft contact surface, improve the stability of setting.
Example 5
The embodiment is a use method of a multi-stage low-pressure driven dual-working-flow-channel packer, and specifically comprises the following steps:
when the device is used, the device is connected in series to the setting position of the working pipe column in the well, then a pump below the working pipe column is used for pressing the inner cavity of the central pipe 3, and meanwhile a tool at the upper part of the working pipe column is used for plugging the inner cavity of the central pipe 3.
Hydraulic pressure enters a first pressure transmission gap 17 and a second pressure transmission gap 18 through a bridge type pressure guide channel 16, then the sliding piston 8 is pushed to move upwards, the sliding piston 8 is linked with the sliding sleeve 10 and the clamp spring sleeve 12 to move upwards together, the uppermost sliding piston 8 extrudes a rubber cylinder to perform setting in the ascending process, and then the clamping groove part 20 is matched with the clamp spring 11 to lock the positions of the sliding piston 8, the sliding sleeve 10 and the clamp spring sleeve 12, so that the setting operation is completed.
And after setting is finished, the inner cavity of the central tube 3 is unblocked, the inner cavity of the central tube 3 is used as a first working channel, and the annular flow channel 22 and the bypass flow channel 2 are used as a second working channel.
The invention creatively utilizes the pressure in the well as the setting power, and is matched with the structure of the multi-stage pressure cavity to provide multi-stage pressure matching under the low-pressure driving so as to realize the setting mode of short-distance pressure transmission and low-pressure driving, thereby being a revolutionary improvement of the high-pressure and long-distance pressure transmission setting mode in the well by adopting the ground at present.
The invention has compact and reasonable structure, can have double working flow passages while designing the multi-stage hydraulic group so as to ensure the requirement of realizing injection-production synchronous operation, and in addition, the size of a well head is fixed when the device is applied.
Claims (8)
1. The utility model provides a multistage low pressure driven duplex flow path packer, includes the center tube, its characterized in that: the central tube is of a double-layer structure with an annular flow channel, and the outer side of the central tube is sequentially provided with a connecting tube, a rubber cylinder group, a multi-stage hydraulic group and a clamp spring sleeve from top to bottom;
the multistage hydraulic unit comprises a plurality of sliding pistons connected on the peripheral surface of the central pipe in a sliding and sealing mode and sliding sleeves, and two ends of each sliding sleeve are connected on the peripheral surfaces of two adjacent sliding pistons respectively;
a positioning sleeve is fixedly arranged between two adjacent sliding pistons on the outer peripheral surface of the central tube, the outer peripheral surface of the positioning sleeve is in sliding sealing fit with the inner peripheral surface of the sliding sleeve, and a first pressure transmission gap is arranged between the top of the positioning sleeve and the adjacent sliding piston;
the bottom of the outer peripheral surface of the central tube is provided with an annular step, a second pressure transmission gap is arranged between the top of the annular step and the adjacent sliding piston, and the central tube is respectively provided with a bridge type pressure guide channel for communicating the inner cavity of the central tube with the first pressure transmission gap and the second pressure transmission gap;
the clamp spring sleeve is installed on the outer side of the annular step in a sliding and sealing mode, the top of the clamp spring sleeve is connected with the adjacent sliding piston, a shearing pin is arranged between the clamp spring sleeve and the annular step, a clamping groove portion is formed in the inner circumferential surface of the clamp spring sleeve, and a clamp spring matched with the clamping groove portion is arranged on the outer circumferential surface of the annular step.
2. The multi-stage low pressure driven dual working flow path packer of claim 1, wherein: the central tube comprises an inner tube body and an outer tube body, and a plurality of spacer blocks are connected between the inner tube body and the outer tube body.
3. The multi-stage low pressure driven dual working flow path packer of claim 2, wherein: the bridge type pressure guide channel is a communicating hole which is correspondingly formed on the inner pipe body, the spacing block and the outer pipe body.
4. The multi-stage low pressure driven dual working flow path packer of claim 2, wherein: the bottom of center tube is connected with the lower clutch of annular space runner bottom shutoff, the side opening with annular space runner intercommunication is seted up to the lower extreme of outer pipe body.
5. The multi-stage low pressure driven dual working flow path packer of claim 1, wherein: the top of center tube and connecting pipe is connected with the top connection, set up the bypass runner with the annular space runner intercommunication of center tube on the wall of top connection.
6. The multi-stage low pressure driven dual working flow path packer of claim 1, wherein: the clamping groove part protrudes out of the inner circumferential surface of the clamping spring sleeve, and the upper end of the clamping groove part is of a slope-shaped structure.
7. The multi-stage low pressure driven dual working flow path packer of claim 1, wherein: the glue cylinder group comprises a middle glue cylinder and edge glue cylinders distributed on two sides of the middle glue cylinder.
8. The multi-stage low pressure driven dual working flow path packer of claim 7, wherein: and a spacer ring is arranged between the middle rubber cylinder and the side rubber cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211616106.5A CN115613995B (en) | 2022-12-16 | 2022-12-16 | Multi-stage low-pressure driven double-working-flow-channel packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211616106.5A CN115613995B (en) | 2022-12-16 | 2022-12-16 | Multi-stage low-pressure driven double-working-flow-channel packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115613995A true CN115613995A (en) | 2023-01-17 |
| CN115613995B CN115613995B (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211616106.5A Active CN115613995B (en) | 2022-12-16 | 2022-12-16 | Multi-stage low-pressure driven double-working-flow-channel packer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115822508A (en) * | 2023-02-10 | 2023-03-21 | 山东圣颐石油技术开发有限公司 | Multi-stage hydraulic setting co-well injection and production system pipe column |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1085767A (en) * | 1964-08-10 | 1967-10-04 | Camco Inc | Improved subsurface well packer assembly |
| CN203702076U (en) * | 2014-02-19 | 2014-07-09 | 安东石油技术（集团）有限公司 | Combined rubber sleeve packer |
| CN207315293U (en) * | 2017-09-27 | 2018-05-04 | 中国石油天然气股份有限公司 | Packer |
| CN110295867A (en) * | 2019-06-21 | 2019-10-01 | 中国石油集团渤海钻探工程有限公司 | Multilevel hierarchy pressure break degradable packer and fracturing string |
| CN209976509U (en) * | 2019-12-19 | 2020-01-21 | 山东普瑞思德石油技术有限公司 | Recovery type ash squeezing device |
-
2022
- 2022-12-16 CN CN202211616106.5A patent/CN115613995B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1085767A (en) * | 1964-08-10 | 1967-10-04 | Camco Inc | Improved subsurface well packer assembly |
| CN203702076U (en) * | 2014-02-19 | 2014-07-09 | 安东石油技术（集团）有限公司 | Combined rubber sleeve packer |
| CN207315293U (en) * | 2017-09-27 | 2018-05-04 | 中国石油天然气股份有限公司 | Packer |
| CN110295867A (en) * | 2019-06-21 | 2019-10-01 | 中国石油集团渤海钻探工程有限公司 | Multilevel hierarchy pressure break degradable packer and fracturing string |
| CN209976509U (en) * | 2019-12-19 | 2020-01-21 | 山东普瑞思德石油技术有限公司 | Recovery type ash squeezing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115822508A (en) * | 2023-02-10 | 2023-03-21 | 山东圣颐石油技术开发有限公司 | Multi-stage hydraulic setting co-well injection and production system pipe column |
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| Publication number | Publication date |
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| CN115613995B (en) | 2023-02-24 |
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