CN210033362U - High pressure difference step-by-step deblocking packer - Google Patents
High pressure difference step-by-step deblocking packer Download PDFInfo
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- CN210033362U CN210033362U CN201920682248.9U CN201920682248U CN210033362U CN 210033362 U CN210033362 U CN 210033362U CN 201920682248 U CN201920682248 U CN 201920682248U CN 210033362 U CN210033362 U CN 210033362U
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- outer sleeve
- deblocking
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- 238000007789 sealing Methods 0.000 claims abstract description 39
- 238000012856 packing Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 29
- 238000003825 pressing Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 claims 6
- 238000000034 method Methods 0.000 abstract description 7
- 239000003129 oil well Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to a high pressure difference step-by-step deblocking packer, mainly by top connection, center tube, packing element and lower clutch composition, the center tube runs through whole packer inner wall, connect gradually pressure difference balance hydraulic cylinder, sealing member assembly, set assembly, locking step-by-step deblocking assembly and balance hydraulic cylinder composition from top to bottom in proper order outside the center tube, wherein the pressure difference balance hydraulic cylinder is connected with the upper end of sealing member assembly through setting the pin; the lower end part of the sealing element assembly is in threaded sealing connection with the setting assembly; the lower end of the setting assembly is connected with a locking step-by-step deblocking assembly, a balance hydraulic cylinder is arranged between the locking step-by-step deblocking assembly and the central pipe, and the balance hydraulic cylinder is connected with the lower connector through a deblocking pin. The packer is provided with the balance cylinder assembly, so that the pressure difference performance is improved, the set value of the deblocking pin is optimized, the lifting force of the whole pipe column is reduced, the safety and the reliability of the stepwise deblocking assembly are ensured, and the packer is suitable for layered oil extraction and layered water finding and blocking process pipe columns of high-pressure oil wells.
Description
Technical Field
The utility model relates to a high pressure difference deblocking packer step by step belongs to the oil well downhole tool class.
Background
Because technologies such as intelligent layered oil extraction, layered test, water finding and blocking are continuously applied, multiple oil layer groups in the same oil well need to be layered extracted, multiple stages of packers are connected to an oil production string to isolate oil layers, most of the adopted packers are step-by-step deblocking packers, and deblocking force of the oil production string acts on the upper packer during deblocking and does not conduct on the next-stage packer. At present, the adopted pressure difference bearing and step-by-step unsetting mechanisms of the step-by-step unsetting packer are generally controlled by pins, the unsetting is completed by lifting a pipe column to cut off the pins, and then the pipe column is continuously lifted to cut off the pins of the next-stage packer, so that the step-by-step unsetting function is realized. The problem always exists in the use process for many years, if the pin is small, the pin can be automatically sheared to enable the packer to be set midway when the packer meets resistance in the well descending process, and further, the pipe column is invalid, so that the operation cannot be normally finished; in order to ensure the reliability of the packer, a method of increasing the pin is adopted, which causes another problem, the shearing force of the pin is increased, the deblocking force of each level of the packer is increased, the packer cannot be deblocked step by step, the lifting force of a pipe column is gradually increased, the lifting load of an operating machine is increased, and even the oil well is overhauled. In addition, the step-by-step unset packer generally has low capability of resisting the pressure difference between the upper part and the lower part, can automatically cut the unset pin to unset when the pressure difference between layers is increased, so that the packer and the oil production pipe column are invalid, the packer is not suitable for layered oil production, the technical requirements of a high-pressure oil production well can not be met, and particularly, when the layered oil production is carried out in a deep well, the uplift unset force is too large, the pipe column cannot be lifted out, the overhaul accident is easily caused, and the great resource waste is caused.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a high pressure difference deblocking packer step by step, this packer set up the balance cylinder assembly and improved the pressure differential performance, optimized the setting value of deblocking pin, reduced the last pulling force of whole tubular column, guaranteed deblocking assembly security and reliability step by step, the oil recovery of layering, the layering that are applicable to high-pressure oil well are looked for stifled water technology tubular column.
For solving the above problems, the specific technical scheme of the utility model is as follows: a high-pressure-difference step-by-step deblocking packer mainly comprises an upper joint, a central pipe, a rubber cylinder and a lower joint, wherein the central pipe penetrates through the inner wall of the whole packer, and the outer circumference of the central pipe is sequentially connected with a pressure-difference balancing hydraulic cylinder, a sealing element assembly, a setting assembly, a locking step-by-step deblocking assembly and a balancing hydraulic cylinder from top to bottom, wherein the pressure-difference balancing hydraulic cylinder is connected with the upper end part of the sealing element assembly through a setting pin; the lower end part of the sealing element assembly is in threaded sealing connection with the setting assembly; the lower end of the setting assembly is connected with a locking step-by-step deblocking assembly, a balance hydraulic cylinder is arranged between the locking step-by-step deblocking assembly and the central pipe, and the balance hydraulic cylinder is connected with the lower connector through a deblocking pin.
The setting assembly consists of three sets of setting pistons, each set of setting piston has a structure that a front piston and a rear piston are coaxially distributed in a piston outer sleeve up and down, the rear end part of the rear piston is connected with a fixed pressing sleeve in a threaded manner, a clamp spring is embedded in a groove arranged in the central tube, and the joint of the rear piston and the fixed pressing sleeve presses the clamp spring and is fixed on the central tube; a first liquid inlet hole, a second liquid inlet hole and a third liquid inlet hole are distributed on the central pipe at the corresponding position between each group of front pistons and rear pistons; wherein the first group of front pistons at the upper end contact with the lower end of the sealing element assembly after moving; the piston jackets of the first group, the second group and the third group are sequentially connected end to end through threads, and the tail end of the piston jacket of the third group is provided with a locking step-by-step deblocking assembly; the front pistons of the second group and the third group generate thrust on the piston jackets of the previous group after moving upwards.
The locking step-by-step deblocking assembly structure is characterized in that sawtooth threads are arranged on the inner circumference of the tail end of the piston outer sleeve of the third group, a sawtooth locking ring is arranged on the outer circumference of a clamping ring seat which is coaxially matched with the central pipe, the sawtooth locking ring is matched with the sawtooth threads and is locked in a one-way stopping mode, and the upper end portion of the lower joint is in threaded connection with the clamping ring seat through internal threads.
The balance hydraulic cylinder is structurally characterized in that a lower joint is connected with a clamping ring seat and then forms a cavity with a central pipe, and a lower balance piston in sliding connection is arranged in the cavity; the tail end of the central pipe is connected with a fixed piston in a threaded manner, and the unsealing pin penetrates through the threaded hole of the lower joint and then is inserted into the groove corresponding to the fixed piston; a fourth liquid inlet hole is formed in the central pipe between the lower balance piston and the fixed piston; the lower joint is provided with a balance hole communicated with the cavity, and the balance hole is positioned at the upper end of the cavity.
The outer circumference of the lower joint is coaxially provided with a locking outer sleeve and a locking block outer sleeve, the upper end of the locking outer sleeve is in threaded connection with the piston outer sleeve of the third group, the inner circumference of the lower end of the locking outer sleeve is attached to the outer circumference of the lower joint, the outer circumference is provided with a groove, the groove is in lap joint with an annular groove in the upper end of the locking block outer sleeve, and the lower end of the locking block outer sleeve is in threaded connection with the lower; a through hole is arranged at the upper part of the locking outer sleeve, the position of the through hole corresponds to that of the balance hole, an annular groove is arranged at the position of the through hole on the inner circumference of the locking outer sleeve, and the length of the annular groove corresponds to that of the setting displacement; the lower joint is close to the deblocking pin and comes in and goes out the locking piece, and the locking piece surface is spacing in locking overcoat circumference, and the locking piece internal surface passes the locking overcoat and inserts fixed piston outer circumference, and the height of locking piece is less than the deblocking pin, and the position corresponds with locking piece overcoat upper end ring channel position.
The upper differential pressure balance hydraulic cylinder is structurally characterized in that the outer circumference of the lower end of the upper joint is connected with the upper outer sleeve in a threaded sealing manner, and the inner circumference is connected with the central pipe in a sealing manner; an upper balance piston is arranged between the central pipe and the upper outer sleeve; the upper part of the central pipe is provided with a fifth liquid inlet hole which is positioned at the upper end of a cavity formed by the upper joint and the upper balance piston and is communicated with the cavity; the upper outer sleeve is provided with a thread through hole, and the seat seal pin is inserted into the corresponding groove of the upper balance piston after being screwed in.
The sealing element assembly is structurally characterized in that a rubber cylinder mandrel is coaxially arranged on a central pipe, two ends of the rubber cylinder mandrel are connected with rubber cylinder anti-protruding pieces in a sealing mode, a rubber cylinder is arranged between the rubber cylinder anti-protruding pieces, and every two adjacent rubber cylinders are divided and compressed through a spacer ring.
The high-pressure-difference step-by-step unsetting packer is composed of five parts, namely an upper-pressure-difference balance hydraulic cylinder, a sealing element assembly, a setting assembly, a locking step-by-step unsetting assembly and a balance hydraulic cylinder, and performs combined action, so that reliable setting and unsetting work is realized.
The setting assembly is composed of three sets of setting pistons, and after high-pressure liquid is injected from the first liquid inlet hole to the third liquid inlet hole, each front piston can move upwards to enable each piston outer sleeve to move upwards to compress the sealing element assembly, so that the packer achieves the setting effect.
The locking step-by-step unsealing assembly adopts a structure of a sawtooth thread and a sawtooth locking ring, so that the sealing element assembly is still in a setting state after the internal pressure of the central pipe is reduced, and the resetting failure is avoided.
In order to ensure the balance of the pressure difference between the upper part and the lower part, a balance hydraulic cylinder is arranged between the lower joint at the tail end and the central pipe, so that the lower joint can ensure the balance of the pressure at any stage.
Set up the locking piece in addition at the lower clutch, prevent that the lower clutch from droing before the setting, set up the locking piece overcoat simultaneously, make the locking piece be unlikely to fall into the pit shaft.
And an upper differential pressure balancing hydraulic cylinder is arranged above the central pipe and used for applying upward pressure to the sealing element assembly to shear the setting pin, so that the setting action is realized.
The sealing element assembly adopts a sectional type rubber cylinder structure, and the setting performance of the rubber cylinder is improved.
Drawings
FIG. 1 is a schematic structural diagram of a high-pressure-difference step-by-step unset packer.
Fig. 2 is a partial enlarged view of the point i in fig. 1.
Fig. 3 is a partial enlarged view of the point ii in fig. 1.
Fig. 4 is a partial enlarged view of fig. 1 at iii.
Detailed Description
As shown in fig. 1 to 4, a high differential pressure step-by-step unsetting packer mainly comprises an upper joint 1, a central pipe 2, a packing element 7 and a lower joint 27, wherein the central pipe 2 penetrates through the inner wall of the whole packer, and a differential pressure balancing hydraulic cylinder, a sealing element assembly, a setting assembly, a locking step-by-step unsetting assembly and a balancing hydraulic cylinder are sequentially connected to the outer circumference of the central pipe 2 from top to bottom, wherein the differential pressure balancing hydraulic cylinder is connected with the upper end part of the sealing element assembly through a setting pin 6; the lower end part of the sealing element assembly is in threaded sealing connection with the setting assembly; the lower end of the setting assembly is connected with a locking step-by-step deblocking assembly, a balance hydraulic cylinder is arranged between the locking step-by-step deblocking assembly and the central pipe 2, and the balance hydraulic cylinder is connected with a lower connector 27 through a deblocking pin 25.
The setting assembly consists of three sets of setting pistons, each set of setting piston is of a structure that a front piston 11 and a rear piston 13 are coaxially distributed in a piston outer sleeve 15 from top to bottom, the rear end part of the rear piston 13 is in threaded connection with a fixed pressing sleeve 28, a snap spring 14 is embedded in a groove arranged in the central tube 2, and the joint of the rear piston 13 and the fixed pressing sleeve 28 presses the snap spring 14 and is fixed on the central tube 2; a first liquid inlet hole 12, a second liquid inlet hole 16 and a third liquid inlet hole 17 are distributed on the central pipe 2 at the corresponding position between each group of front pistons 11 and rear pistons 13; wherein the first group of front pistons at the upper end contact with the lower end of the sealing element assembly after moving; the piston outer sleeves 15 of the first group, the second group and the third group are sequentially connected end to end through threads, and a locking step-by-step deblocking assembly is arranged at the tail end of the piston outer sleeve 15 of the third group; the front pistons 11 of the second and third groups travel upward and produce thrust against the piston jackets 15 of the previous group.
The locking step-by-step deblocking assembly structure is that sawtooth threads 20 are arranged on the inner circumference of the tail end of the piston outer sleeve 15 of the third group, sawtooth locking rings 18 are arranged on the outer circumferences of clamping ring seats 19 coaxially matched with the central pipe 2, the sawtooth locking rings 18 are matched with the sawtooth threads 20 and are locked in a one-way stopping mode, and the upper end portion of the lower connector 27 is in threaded connection with the clamping ring seats 19 through internal threads.
The balance hydraulic cylinder is structurally characterized in that a lower connector 27 is connected with the clamping ring seat 19 and then forms a cavity with the central tube 2, and a lower balance piston 21 in sliding connection is arranged in the cavity; a fixed piston 29 is connected to the end of the central tube 2 in a threaded manner, and the unsealing pin 25 is inserted into a corresponding groove of the fixed piston 29 after passing through a threaded hole of the lower joint 27; a fourth liquid inlet hole 22 is formed in the central pipe 2 between the lower balance piston 21 and the fixed piston 29; the lower joint 27 is provided with a balance hole 30 communicated with the cavity, and the balance hole 30 is positioned at the upper end of the cavity.
The outer circumference of the lower joint 27 is coaxially provided with a locking outer sleeve 23 and a locking block outer sleeve 26, the upper end of the locking outer sleeve 23 is in threaded connection with the piston outer sleeve 15 of the third group, the inner circumference of the lower end of the locking outer sleeve 23 is attached to the outer circumference of the lower joint 27, the outer circumference is provided with a groove, the groove is in lap joint with an annular groove at the upper end of the locking block outer sleeve 26, and the lower end of the locking block outer sleeve 26 is in threaded connection with the lower joint; a through hole is arranged at the upper part of the locking outer sleeve 23, the position of the through hole corresponds to the position of the balance hole 30, an annular groove is arranged at the position of the through hole on the inner circumference of the locking outer sleeve 23, and the length of the annular groove corresponds to the length of the setting displacement; the lower joint is in and out of the locking block 24 at the position close to the deblocking pin, the outer surface of the locking block 24 is limited at the inner circumference of the locking outer sleeve 23, the inner surface of the locking block 24 penetrates through the locking outer sleeve 23 and is inserted into the outer circumference of the fixed piston 29, the height of the locking block 24 is smaller than that of the deblocking pin 25, and the position of the locking block 24 corresponds to the position of an annular groove at the upper end of the locking block outer sleeve 26.
The upper differential pressure balance hydraulic cylinder is structurally characterized in that the outer circumference of the lower end of an upper joint 1 is connected with an upper outer sleeve 3 in a threaded sealing manner, and the inner circumference is connected with a central pipe 2 in a sealing manner; an upper balance piston 5 is arranged between the central tube 2 and the upper outer sleeve 3; the upper part of the central pipe 2 is provided with a fifth liquid inlet hole 4, and the fifth liquid inlet hole 4 is positioned at the upper end of a cavity formed by the upper joint 1 and the upper balance piston 5 and is communicated with the cavity; the upper outer sleeve 3 is provided with a thread through hole, and the setting pin 6 is inserted into the corresponding groove of the upper balance piston 5 after being screwed in.
The sealing element assembly is structurally characterized in that a rubber cylinder mandrel 9 is coaxially arranged on the central tube 2, two ends of the rubber cylinder mandrel 9 are connected with rubber cylinder anti-protruding pieces 10 in a sealing mode, a rubber cylinder 7 is arranged between the rubber cylinder anti-protruding pieces 10, and every two adjacent rubber cylinders 7 are divided and compressed through a spacer ring.
The utility model discloses a working process does: earlier the utility model provides a high pressure difference deblocking packer step by step connects on the layering oil production pipe column, goes into in the oil recovery well down. Setting operation process: the ground is connected with a pump truck to pressurize the inside of the oil pipe, water enters the upper first liquid inlet hole 12, the second liquid inlet hole 16 and the third liquid inlet hole 17 of the central pipe 2 of the packer through the oil pipe to push the front piston 11 in each hydraulic cylinder in the setting assembly to move upwards and compress the sealing element assembly to enable the outer diameter of the rubber cylinder 7 to expand and cling to the inner wall of the sleeve, the locking outer sleeve 23 also moves upwards along with the movement, the locking block 24 is released, the sawtooth locking ring 18 is locked with the sawtooth thread 20 to ensure that the rubber cylinder is compressed to stop and does not rebound, the sealing state of an oil layer is always kept, and the setting operation is finished.
Pressure difference resistance state: when the liquid pressure on the upper part of the expansion rubber cylinder is larger than the liquid pressure on the lower part, the acting force of the lower pushing rubber cylinder is generated, the upper liquid pressure generates the upper pushing force to the upper balance piston 5, the acting force of the lower pushing rubber cylinder is balanced by a certain amount, and the acting force of the lower pushing rubber cylinder is prevented from being transmitted to the deblocking pin, so that the upper pressure difference resistance of the packer is increased, and the set tonnage value of the deblocking pin is reduced.
Pressure drop resistant state: when the liquid pressure at the lower part of the expansion rubber cylinder is greater than the liquid pressure at the upper part, the acting force of the upward pushing rubber cylinder is generated, the lower liquid pressure generates the lower pushing force on the setting piston, the reaction force of the upward pushing rubber cylinder is generated and decomposed on the central tube, the acting force of the upward pushing rubber cylinder is prevented from being transmitted to the setting pin, the stress of the lower balance piston moves downwards at the moment, the lower differential pressure resistance of the packer is further improved, and the safety and the reliability of the step-by-step setting assembly and the setting assembly are ensured. And (3) unsealing operation process: the uppermost packer of the upward lifting pipe column is firstly stressed, the upper joint 1 and the central pipe 2 are lifted, as the locking step-by-step deblocking assembly is stressed by the pulling force of the lower pipe column, the central pipe moves upwards and shears the deblocking pin 25, the central pipe is separated from the lower joint in the step-by-step deblocking mechanism by about 10cm, the locking step-by-step deblocking assembly is driven to be disengaged, and the rubber sleeve 7 in the sealing element assembly is fully released downwards by the rebound force; the deblocking mechanism can break off smoothly step by step during the deblocking, and the packing element obtains fully releasing, and the pulling force of lifting is single packer deblocking power, so can increase the quantity that the packer was connected to the tubular column, guarantee the fail safe nature of operation.
Claims (7)
1. The utility model provides a high pressure difference deblocking packer step by step mainly comprises top connection (1), center tube (2), packing element (7) and lower clutch (27), its characterized in that: the central pipe (2) penetrates through the inner wall of the whole packer, and the outer circumference of the central pipe (2) is sequentially connected with a differential pressure balancing hydraulic cylinder, a sealing element assembly, a setting assembly, a locking step-by-step deblocking assembly and a balancing hydraulic cylinder from top to bottom, wherein the differential pressure balancing hydraulic cylinder is connected with the upper end part of the sealing element assembly through a setting pin (6); the lower end part of the sealing element assembly is in threaded sealing connection with the setting assembly; the lower end part of the setting assembly is connected with a locking step-by-step deblocking assembly, a balance hydraulic cylinder is arranged between the locking step-by-step deblocking assembly and the central pipe (2), and the balance hydraulic cylinder is connected with the lower connector (27) through a deblocking pin (25).
2. The high differential pressure progressive unset packer of claim 1, wherein: the setting assembly is composed of three sets of setting pistons, each set of setting piston is in a structure that a front piston (11) and a rear piston (13) are coaxially distributed in a piston outer sleeve (15) up and down, the rear end part of the rear piston (13) is in threaded connection with a fixed pressing sleeve (28), a clamp spring (14) is embedded in a groove formed in the central tube (2), and the clamp spring (14) is pressed at the joint of the rear piston (13) and the fixed pressing sleeve (28) and fixed on the central tube (2); a first liquid inlet hole (12), a second liquid inlet hole (16) and a third liquid inlet hole (17) are distributed on the central pipe (2) at the corresponding position between each group of front pistons (11) and rear pistons (13); wherein the first group of front pistons at the upper end contact with the lower end of the sealing element assembly after moving; the piston jackets (15) of the first group, the second group and the third group are sequentially connected end to end through threads, and the tail end of the piston jacket (15) of the third group is provided with a locking step-by-step unsealing assembly; the front pistons (11) of the second group and the third group generate thrust on the piston jackets (15) of the previous group after moving upwards.
3. The high differential pressure progressive unset packer of claim 2, wherein: the locking step-by-step deblocking assembly structure is characterized in that sawtooth threads (20) are arranged on the inner circumference of the tail end of a piston outer sleeve (15) of the third group, a sawtooth locking ring (18) is arranged on the outer circumference of a clamping ring seat (19) coaxially matched with a central pipe (2), the sawtooth locking ring (18) is matched with the sawtooth threads (20) and is locked in a one-way stopping mode, and the upper end portion of a lower joint (27) is in threaded connection with the clamping ring seat (19) through internal threads.
4. The high differential pressure progressive unset packer of claim 3, wherein: the balance hydraulic cylinder is structurally characterized in that a lower joint (27) is connected with a snap ring seat (19) and then forms a cavity with a central pipe (2), and a lower balance piston (21) in sliding connection is arranged in the cavity; the tail end of the central tube (2) is in threaded connection with a fixed piston (29), and an unsealing pin (25) penetrates through a threaded hole of the lower joint (27) and then is inserted into a corresponding groove of the fixed piston (29); a fourth liquid inlet hole (22) is formed in the central pipe (2) between the lower balance piston (21) and the fixed piston (29); the lower joint (27) is provided with a balance hole (30) communicated with the cavity, and the balance hole (30) is positioned at the upper end of the cavity.
5. The high differential pressure progressive unset packer of claim 4, wherein: the outer circumference of the lower joint (27) is coaxially provided with a locking outer sleeve (23) and a locking block outer sleeve (26), the upper end of the locking outer sleeve (23) is in threaded connection with the piston outer sleeve (15) of the third group, the inner circumference of the lower end of the locking outer sleeve (23) is attached to the outer circumference of the lower joint (27), the outer circumference is provided with a groove, the groove is in lap joint with an annular groove at the upper end of the locking block outer sleeve (26), and the lower end of the locking block outer sleeve (26) is in threaded connection with the lower joint (27); a through hole is arranged at the upper part of the locking outer sleeve (23) and corresponds to the position of the balance hole (30), an annular groove is arranged at the position of the inner circumference of the locking outer sleeve (23) and the through hole, and the length of the annular groove corresponds to the setting displacement length; the lower joint is in and out of the locking block (24) at a position close to the deblocking pin, the outer surface of the locking block (24) is limited on the inner circumference of the locking outer sleeve (23), the inner surface of the locking block (24) penetrates through the locking outer sleeve (23) and is inserted into the outer circumference of the fixed piston (29), the height of the locking block (24) is smaller than that of the deblocking pin (25), and the position of the locking block (24) corresponds to that of an annular groove at the upper end of the locking block outer sleeve (26).
6. The high differential pressure progressive unset packer of claim 1, wherein: the upper differential pressure balancing hydraulic cylinder is structurally characterized in that the outer circumference of the lower end of an upper joint (1) is connected with an upper outer sleeve (3) in a threaded sealing manner, and the inner circumference is connected with a central pipe (2) in a sealing manner; an upper balance piston (5) is arranged between the central tube (2) and the upper outer sleeve (3); a fifth liquid inlet hole (4) is formed in the upper portion of the central tube (2), and the fifth liquid inlet hole (4) is located in the upper end of a cavity formed by the upper connector (1) and the upper balance piston (5) and is communicated with the cavity; the upper outer sleeve (3) is provided with a thread through hole, and the setting pin (6) is inserted into the corresponding groove of the upper balance piston (5) after being screwed in.
7. The high differential pressure progressive unset packer of claim 1, wherein: the sealing element assembly is structurally characterized in that a central tube (2) is coaxially provided with a rubber cylinder core shaft (9), two ends of the rubber cylinder core shaft (9) are connected with rubber cylinder anti-protruding pieces (10) in a sealing mode, a rubber cylinder (7) is arranged between the rubber cylinder anti-protruding pieces (10), and every two adjacent rubber cylinders (7) are divided and compressed through a spacer ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920682248.9U CN210033362U (en) | 2019-05-14 | 2019-05-14 | High pressure difference step-by-step deblocking packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920682248.9U CN210033362U (en) | 2019-05-14 | 2019-05-14 | High pressure difference step-by-step deblocking packer |
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| Publication Number | Publication Date |
|---|---|
| CN210033362U true CN210033362U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920682248.9U Expired - Fee Related CN210033362U (en) | 2019-05-14 | 2019-05-14 | High pressure difference step-by-step deblocking packer |
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| Country | Link |
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| CN (1) | CN210033362U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112012688A (en) * | 2020-10-16 | 2020-12-01 | 山东大东联石油设备有限公司 | Relay seat-sealing type packer and method |
| CN115370316A (en) * | 2022-09-01 | 2022-11-22 | 惟其信石油机械(天津)有限公司 | Double-anchoring high-pressure packer |
-
2019
- 2019-05-14 CN CN201920682248.9U patent/CN210033362U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112012688A (en) * | 2020-10-16 | 2020-12-01 | 山东大东联石油设备有限公司 | Relay seat-sealing type packer and method |
| CN112012688B (en) * | 2020-10-16 | 2022-07-15 | 山东大东联石油设备有限公司 | Relay seat-sealing type packer and method |
| CN115370316A (en) * | 2022-09-01 | 2022-11-22 | 惟其信石油机械(天津)有限公司 | Double-anchoring high-pressure packer |
| CN115370316B (en) * | 2022-09-01 | 2024-05-28 | 惟其信石油机械(天津)有限公司 | Double-anchoring high-pressure packer |
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