CN110552654B - Hydraulic control deblocking type leather cup packer - Google Patents
Hydraulic control deblocking type leather cup packer Download PDFInfo
- Publication number
- CN110552654B CN110552654B CN201810560866.6A CN201810560866A CN110552654B CN 110552654 B CN110552654 B CN 110552654B CN 201810560866 A CN201810560866 A CN 201810560866A CN 110552654 B CN110552654 B CN 110552654B
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- sleeve
- deblocking
- leather cup
- supporting tube
- piston
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- 239000010985 leather Substances 0.000 title claims abstract description 56
- 238000007789 sealing Methods 0.000 claims description 33
- 238000012856 packing Methods 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 5
- 238000012546 transfer Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
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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)
- Actuator (AREA)
Abstract
The invention discloses a hydraulic control deblocking type leather cup packer, wherein a hydraulic control annular space is formed between a supporting tube and a central tube, a leather cup, a deblocking sleeve, a cylinder sleeve and a piston are all sleeved on the outer wall of the supporting tube, a lower annular platform is arranged on the inner wall of the leather cup, the cylinder sleeve is propped against the lower end surface of the lower annular platform, the piston is installed in the cylinder sleeve, the upper end of the piston is also propped against the lower end surface of the lower annular platform, a pressure transfer through hole is formed in the supporting tube and enables the hydraulic control annular space to be communicated with an inner cavity of the cylinder sleeve, the pressure transfer through hole is lower than the lower end surface of the piston, the upper end of the leather cup is fixed on the leather cup seat, the deblocking sleeve is composed of a cylindrical sleeve body and a necking annular platform cap arranged at the upper end of the cylindrical sleeve body, a spring is arranged inside the deblocking sleeve, the lower end of the spring is propped against the upper end surface of the necking annular platform cap at the upper end of the deblocking sleeve. The packer setting device is simple in structure, and the packer setting is realized by combining self restoring force, spring force and oil pipe hydraulic pressure.
Description
Technical Field
The invention relates to the field of oil well exploitation, in particular to a hydraulic control deblocking type cup leather packer.
Background
As the development of oil fields enters the middle and later stages, more and more high-pressure low-permeability oil reservoirs exist, and the research of fracturing construction technology and the development of matched tools become more and more important. The existing packing cup packer used for the separate-layer fracturing can only be dragged into an oil layer construction section in a well due to no retraction, so that the damage to the packing cup sealing effect and the service life of the packing cup is great, and the simultaneous fracturing construction effect of a plurality of layers and the implementation efficiency of a mobile separate-layer fracturing process are influenced.
A hydraulic cup packer described in CN200320124706.6 and a cup packer described in CN201120397041.0 both realize cup expansion setting by pushing a wedge block through hydraulic pressure, and the cup is restored to the original shape by a spring after pressure relief, and CN201210248844.9 and CN201220348411.6 disclose a sealing cup sealing device for pressure test of a blowout preventer, which is a mechanical cup sealing device that uses a manual rod to rotate to seal an oil sleeve annulus.
Disclosure of Invention
The invention aims to provide a hydraulic control deblocking type cup packer, wherein a hydraulic control pipeline is attached to the packer in the well descending process, and a cup shrinks in a deblocking sleeve under the action of pressure in the hydraulic control pipeline. When the process string moves within the well, the cup does not contact the casing inner wall. When arriving the fracturing position, release pressure in the hydraulic control pipeline, the leather cup is under the effect of spring thrust and self restoring force, and the reconversion, outer terminal surface contact the sleeve pipe inner wall, along with oil pipe injection hydraulic pressure's increase, the leather cup hugs closely the sleeve pipe more, realizes sealed tightly. After the fracturing construction of the interval is finished, the hydraulic control pipeline is pressed, the packing cup retracts into the deblocking sleeve under the action of the piston, and deblocking of the packing cup is achieved.
In order to achieve the purpose, the invention adopts the following technical scheme that the hydraulic control deblocking type leather cup packer comprises a central tube and a leather cup, and further comprises a supporting tube, a deblocking sleeve, a spring, a cylinder sleeve and a piston, wherein the supporting tube is sleeved outside the central tube, a hydraulic control annular space is formed between the supporting tube and the central tube, the leather cup, the deblocking sleeve, the cylinder sleeve and the piston are all sleeved on the outer wall of the supporting tube, a lower annular table is arranged on the inner wall of the leather cup, the cylinder sleeve is propped against the lower end face of the lower annular table, the piston is arranged in the cylinder sleeve, the upper end of the piston is also propped against the lower end face of the lower annular table, the supporting tube is provided with a pressure transmitting through hole, the hydraulic control annular space is communicated with the inner cavity of the cylinder sleeve, the pressure transmitting through hole is lower than the lower end face of the piston, the upper end of the leather cup is, the lower end of the spring abuts against the upper end face of the leather cup seat, the upper end of the spring abuts against the lower end face of the neck ring cap at the upper end of the deblocking sleeve, and the leather cup seat can overcome the pressure of the spring and can completely enter the deblocking sleeve under the driving of the piston.
The packing leather cup sets up one at least, and wherein the quantity of packing leather cup, the quantity of deblocking cover, the quantity of cylinder liner, the quantity of piston all keep unanimous, when the packing leather cup was provided with two and more than two, the deblocking cover that the packing leather cup of below corresponds and the cylinder liner that the packing leather cup of top corresponds connect into integral type structure, and the cylinder liner passes through set screw to be fixed on the stay tube.
The upper end of the supporting tube is limited on a central tube outer clamping table arranged on the outer wall of the central tube, the upper end face of a necking ring table cap of the uppermost deblocking sleeve is limited on a supporting tube outer clamping table arranged on the outer wall of the upper end of the supporting tube, and the upper end of the central tube is connected with an upper connector.
The cylinder sleeve lower extreme of stay tube lower extreme and below all pushes up on the adjustable ring, and the adjustable ring is connected on the lower clutch, and the center tube is connected to the lower clutch upper end, the adjustable ring still passes through set screw to be fixed on the lower clutch.
An inclined hydraulic control through hole is formed in the upper end of the supporting tube and communicated with a hydraulic control annulus.
The inner wall of the upper end of the supporting tube is sealed with the central tube through a sealing ring, and the lower end surface of the supporting tube is sealed with the adjusting ring and the central tube through the sealing ring; the inner hole surface of the deblocking sleeve and the supporting tube are sealed through a sealing ring; the leather cup seat and the leather cup are sealed through a sealing ring; the inner wall and the outer wall of the piston are respectively sealed with the supporting pipe and the cylinder sleeve through sealing rings; the cylinder sleeve and the supporting pipe are sealed through a sealing ring; the upper end of the adjusting ring is provided with a concave sealing groove in which a sealing ring is arranged.
The utility model discloses a hydraulic control anchor pipe, including the support pipe, the cylinder liner lower extreme of bottom is all pushed up at the adjustable ring up end, and the support pipe lower extreme stretches into the adjustable ring inner chamber, and the cylinder liner lower extreme of below all pushes up at the adjustable ring up end, and the adjustable ring is connected on the lower clutch, and the center tube is connected to the lower clutch upper end, the adjustable ring still passes through set screw to be fixed on the lower clutch, the hydraulic control hole of slant decurrent is seted up to the adjustable ring, and the hydraulic control annular space of this hydraulic control hole intercommunication support pipe.
Compared with the prior art, the invention has the following beneficial effects:
(1) a hydraulic control deblocking cup packer;
(2) the packer setting device is simple in structure, and the self restoring force, the spring force and the oil pipe hydraulic pressure are combined to realize packer setting;
(3) the principle is clear, and the structure is simple and reliable.
Drawings
FIG. 1 is a schematic structural diagram of a hydraulic control deblocking type cup packer of the invention;
fig. 2 is a schematic diagram of another embodiment of the present invention.
In the figure: the device comprises an upper joint 1, a central pipe 2, a supporting pipe 3, an upper unpacking sleeve 4, a spring 5, a leather cup seat 6, a leather cup 7, an upper piston 8, a lower unpacking sleeve 9, a lower piston 10, a lower cylinder sleeve 11, an adjusting ring 12 and a lower joint 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a hydraulic control deblocking formula leather cup packer, by top connection 1, center tube 2, stay tube 3, go up to separate the envelope 4, spring 5, leather cup seat 6, leather cup 7, go up piston 8, separate envelope 9, lower piston 10, lower cylinder jacket 11, adjustable ring 12 and lower clutch 13 and constitute, 2 upper ends of center tube and 1 threaded connection of top connection, middle suit stay tube 3, after the lower extreme sheathes in adjustable ring 12, threaded connection lower clutch 13, stay tube 3 from the top down in order the suit go up to separate envelope 4, spring 5, leather cup seat 6, leather cup 7, go up piston 8, separate envelope 9, spring 5, leather cup seat 6, leather cup 7 down, piston 10 and lower cylinder jacket 11 down.
The inner wall of the upper end of the supporting tube 3 is sealed with the central tube 2 through a sealing ring 201, and the lower end surface of the supporting tube 3 is sealed with the adjusting ring 12 and the central tube 2 through a sealing ring 1201;
the upper end surface of the supporting tube 3 is provided with a hydraulic control through hole 301, and the middle part and the middle lower part are provided with pressure transmission through holes 302 and 303;
the inner hole surface of the upper unpacking sleeve 4 is sealed with the supporting tube 3 through a sealing ring 401, and a spring 5 and a leather cup seat 6 are arranged in the large cylindrical hole;
a leather cup 7 is arranged between the leather cup seat 6 and the lower envelope opening sleeve 9, and the leather cup seat 6 and the leather cup 7 are sealed through a sealing ring 601;
an upper piston 8 is arranged in a cylindrical hole at the upper part of the lower envelope opening sleeve 9, and the upper piston 8 is sealed with the support tube 3 and the lower envelope opening sleeve 9 through a sealing ring 801;
the lower unpacking sleeve 9 is limited in the middle of the supporting tube 3 through an upper positioning screw 902 and is sealed with the supporting tube 3 through a sealing ring 901, and a pressure transfer through hole 302 in the middle of the supporting tube 3 is positioned between the sealing ring 901 and the upper piston 8;
the lower piston 10 is arranged in a cylindrical hole at the upper part of the lower cylinder sleeve 11 and is sealed with the lower cylinder sleeve 11 and the support pipe 3 through a sealing ring 1001;
the lower cylinder sleeve 11 and the supporting tube 3 are sealed by a sealing ring 1101, and a pressure transmission through hole 303 at the middle lower part of the supporting tube 3 is positioned between the sealing ring 1101 and the lower piston 10;
the lower cylinder sleeve 11 is fixed on the support pipe 3 through a lower positioning screw 1102;
a concave sealing groove is formed in the upper end of the adjusting ring 12, and a sealing ring 1201 is arranged in the concave sealing groove;
the adjusting ring 12 is fixed on the outer cylindrical surface of the lower joint 13 by a fixing screw 1202.
According to the invention installed in the foregoing, in field implementation, the hydraulic control line is connected to the hydraulic control hole 301 of the support pipe 3, and the two cups 7 are retracted into the upper and lower release casings 4 and 9 by pressing the hydraulic control line. After the hydraulic control packer is lowered to a preset position in a well along with a fracturing construction pipe column, a hydraulic control pipeline is decompressed, the leather cup 7 pops up under the thrust action of the spring 5 and the self restoring force of the leather cup 7, the cup opening of the leather cup 7 is opened and clings to the inner wall of a casing, and the leather cup 7 is more clung to the casing along with the increase of the pressure of oil pipe fracturing liquid, so that the reliable packing effect is ensured. After fracturing construction is finished, hydraulic pressure is pumped in the hydraulic control pipeline, the leather cup 7 moves upwards under the action of the pistons 8 and 10, and the leather cup is forced to retract into the deblocking sleeve.
In another embodiment of the invention, as shown in fig. 2, the adjusting ring 12a with hydraulic control holes is used instead to implement multi-section cup packing and hydraulic control deblocking under the oil-water well, thereby realizing multi-section fracturing process construction.
The packer is attached with a hydraulic control pipeline in the process of going down the well, and a packing cup is contracted in the deblocking sleeve under the action of pressure in the hydraulic control pipeline. When the process string moves within the well, the cup does not contact the casing inner wall. When arriving the fracturing position, release pressure in the hydraulic control pipeline, the leather cup is under the effect of spring thrust and self restoring force, and the reconversion, outer terminal surface contact the sleeve pipe inner wall, along with oil pipe injection hydraulic pressure's increase, the leather cup hugs closely the sleeve pipe more, realizes sealed tightly. After the fracturing construction of the interval is finished, the hydraulic control pipeline is pressed, the packing cup retracts into the deblocking sleeve under the action of the piston, and deblocking of the packing cup is achieved.
In the description of the present invention, it is to be understood that the positional indications or positional relationships are based on those shown in the drawings and are for the purpose of facilitating the description of the present invention, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A hydraulic control deblocking type leather cup packer comprises a central tube and a leather cup, and is characterized by further comprising a supporting tube, a deblocking sleeve, a spring, a cylinder sleeve and a piston, wherein the supporting tube is sleeved outside the central tube, a hydraulic control annular space is formed between the supporting tube and the central tube, the leather cup, the deblocking sleeve, the cylinder sleeve and the piston are all sleeved on the outer wall of the supporting tube, a lower annular table is arranged on the inner wall of the leather cup, the cylinder sleeve is propped against the lower end face of the lower annular table, the piston is installed in the cylinder sleeve, the upper end of the piston is also propped against the lower end face of the lower annular table, a pressure transmitting through hole is formed in the supporting tube and enables the hydraulic control annular space to be communicated with an inner cavity of the cylinder sleeve, the pressure transmitting through hole is lower than the lower end face of the piston, the upper end of the leather cup is fixed on a leather cup seat, the deblocking sleeve is composed of a cylindrical sleeve body and a necking annular table cap arranged at the upper end of the cylindrical sleeve body, the inside of the deblocking sleeve is provided with the spring, the lower end of the leather cup seat, the upper end of the spring props against the lower end face of a neck ring table cap at the upper end of the deblocking sleeve, and the leather cup seat can overcome the pressure of the spring and can completely enter the deblocking sleeve under the driving of the piston;
the packing structure is characterized in that at least one packing cup is arranged, the number of the packing cups, the number of the deblocking sleeves, the number of the cylinder sleeves and the number of the pistons are kept consistent, when two or more packing cups are arranged, the deblocking sleeve corresponding to the lower packing cup and the cylinder sleeve corresponding to the upper packing cup are connected into an integrated structure, and the cylinder sleeves are fixed on the supporting pipe through positioning screws; the upper end of the supporting tube is limited on a central tube outer clamping table arranged on the outer wall of the central tube, the upper end surface of a necking ring table cap of the uppermost deblocking sleeve is limited on a supporting tube outer clamping table arranged on the outer wall of the upper end of the supporting tube, and the upper end of the central tube is connected with an upper connector; the lower end of the supporting tube and the lower end of the cylinder sleeve at the lowest part are both propped against an adjusting ring, the adjusting ring is connected to a lower joint, the upper end of the lower joint is connected with a central tube, and the adjusting ring is further fixed on the lower joint through a fixing screw;
an inclined hydraulic control through hole is formed in the upper end of the supporting tube and is communicated with a hydraulic control annulus; the inner wall of the upper end of the supporting tube is sealed with the central tube through a sealing ring, and the lower end surface of the supporting tube is sealed with the adjusting ring and the central tube through the sealing ring; the inner hole surface of the deblocking sleeve and the supporting tube are sealed through a sealing ring; the leather cup seat and the leather cup are sealed through a sealing ring; the inner wall and the outer wall of the piston are respectively sealed with the supporting pipe and the cylinder sleeve through sealing rings; the cylinder sleeve and the supporting pipe are sealed through a sealing ring; the upper end of the adjusting ring is provided with a concave sealing groove in which a sealing ring is arranged.
2. The liquid control deblocking type packing cup packer as claimed in claim 1, wherein the lower end of the supporting tube extends into an inner cavity of the adjusting ring, the lower end of the lowermost cylinder sleeve abuts against the upper end face of the adjusting ring, the adjusting ring is connected to the lower joint, the upper end of the lower joint is connected with the central tube, the adjusting ring is further fixed to the lower joint through a fixing screw, the adjusting ring is provided with a liquid control hole which is inclined downwards, and the liquid control hole is communicated with a liquid control annulus of the supporting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810560866.6A CN110552654B (en) | 2018-06-01 | 2018-06-01 | Hydraulic control deblocking type leather cup packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810560866.6A CN110552654B (en) | 2018-06-01 | 2018-06-01 | Hydraulic control deblocking type leather cup packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110552654A CN110552654A (en) | 2019-12-10 |
| CN110552654B true CN110552654B (en) | 2021-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810560866.6A Active CN110552654B (en) | 2018-06-01 | 2018-06-01 | Hydraulic control deblocking type leather cup packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110552654B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD128464A5 (en) * | 1977-01-21 | 1977-11-16 | Koolaj Foldgazbanyaszati | HYDROMECHANIC KEYLESS PACKER |
| CN2693944Y (en) * | 2003-11-28 | 2005-04-20 | 大港油田集团有限责任公司 | Hydraulic cup packer |
| CN201071702Y (en) * | 2007-07-18 | 2008-06-11 | 白霞 | Self-sealing packer |
| CN201778745U (en) * | 2010-07-22 | 2011-03-30 | 中国石油天然气股份有限公司 | Sleeve protection packer used in horizontal well fracture |
| CN202360057U (en) * | 2011-10-18 | 2012-08-01 | 中国石油化工股份有限公司 | Leather cup packer |
| CN204040993U (en) * | 2014-07-15 | 2014-12-24 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | A kind of backwashing wells steel frame expanding water injecting packer |
| CN204252930U (en) * | 2014-11-07 | 2015-04-08 | 中国石油天然气股份有限公司 | Fracturing packer |
| CN207048721U (en) * | 2017-08-23 | 2018-02-27 | 中国石油天然气股份有限公司 | A kind of level pressure draining well-flushing double leather cup packer and level pressure draining well washing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7703512B2 (en) * | 2006-03-29 | 2010-04-27 | Schlumberger Technology Corporation | Packer cup systems for use inside a wellbore |
-
2018
- 2018-06-01 CN CN201810560866.6A patent/CN110552654B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD128464A5 (en) * | 1977-01-21 | 1977-11-16 | Koolaj Foldgazbanyaszati | HYDROMECHANIC KEYLESS PACKER |
| CN2693944Y (en) * | 2003-11-28 | 2005-04-20 | 大港油田集团有限责任公司 | Hydraulic cup packer |
| CN201071702Y (en) * | 2007-07-18 | 2008-06-11 | 白霞 | Self-sealing packer |
| CN201778745U (en) * | 2010-07-22 | 2011-03-30 | 中国石油天然气股份有限公司 | Sleeve protection packer used in horizontal well fracture |
| CN202360057U (en) * | 2011-10-18 | 2012-08-01 | 中国石油化工股份有限公司 | Leather cup packer |
| CN204040993U (en) * | 2014-07-15 | 2014-12-24 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | A kind of backwashing wells steel frame expanding water injecting packer |
| CN204252930U (en) * | 2014-11-07 | 2015-04-08 | 中国石油天然气股份有限公司 | Fracturing packer |
| CN207048721U (en) * | 2017-08-23 | 2018-02-27 | 中国石油天然气股份有限公司 | A kind of level pressure draining well-flushing double leather cup packer and level pressure draining well washing system |
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| Publication number | Publication date |
|---|---|
| CN110552654A (en) | 2019-12-10 |
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