CN217462094U

CN217462094U - Expanding packer

Info

Publication number: CN217462094U
Application number: CN202221277376.3U
Authority: CN
Inventors: 邹刚; 张康; 卢刚; 李应虎; 刘磊; 汪建
Original assignee: SJS Ltd
Current assignee: SJS Ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-09-20
Anticipated expiration: 2032-05-25

Abstract

The utility model discloses an expanding packer, top connection and lower clutch cup joint in the both ends of center tube respectively, the center tube is close to the one end of adapter sleeve and is bored there is the feed liquor hole, the connecting cylinder cup joint in on the center tube and through first pin with the top connection is connected, the adapter sleeve cup joint in on the center tube and with the connecting cylinder is connected, hydraulic sleeve assembly cup joint in on the center tube and with the adapter sleeve is connected, the packing element assembly cup joint in on the center tube and with hydraulic sleeve assembly is connected, and connecting cylinder, adapter sleeve, hydraulic sleeve assembly and packing element assembly are located between top connection and the lower clutch, the float collar cup joint on the center tube and towards the direction setting of being close to the lower clutch, float collar inside be equipped with the float collar endotheca that the center tube contacts, the float collar passes through the second pin and is connected with the float collar, and a key is arranged at the contact position of the floating hoop inner sleeve and the central pipe.

Description

Expanding packer

Technical Field

The utility model belongs to the technical field of the oil field instrument in the pit, concretely relates to expanding packer.

Background

The packer is widely used in oil and gas exploitation, and can be used for plugging a packer layer or a construction layer to ensure that the layers cannot be influenced mutually. After the packer is pressed, the rubber sleeve expands to be tightly attached to the oil pipe, so that plugging is realized; in the packer unsealing process, the pipe column is lifted up generally. However, in the practical use process of the packer, the underground working condition is complex and changeable, particularly, after fracturing, sand sediment, stones and the like can cause the packer to be unset, the pipe column cannot be pulled out, and the difficulty in later-stage oil and gas well construction is increased.

In view of the above, there is a need for a new expandable packer to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an expanding packer solves the problem of the unable deblocking of packer after the construction.

In order to achieve the purpose, the utility model provides an expansion packer, which comprises a central tube, an upper joint, a lower joint, a pin, a lantern ring, a connecting cylinder, a connecting sleeve, a hydraulic sleeve assembly, a rubber cylinder assembly, a key, a floating hoop and a floating hoop inner sleeve; the upper joint and the lower joint are respectively sleeved at two ends of the central pipe, one end of the central pipe close to the upper joint is provided with a liquid inlet, the connecting cylinder is sleeved on the central pipe and is connected with the upper joint through a first pin, the connecting sleeve is sleeved on the central pipe and is connected with the connecting cylinder, the hydraulic sleeve assembly is sleeved on the central pipe and is connected with the connecting sleeve, the rubber sleeve assembly is sleeved on the central pipe and is connected with the hydraulic sleeve assembly, and the connecting cylinder, the connecting sleeve, the hydraulic sleeve assembly and the rubber cylinder assembly are positioned between the upper joint and the lower joint, the floating hoop is sleeved on the central pipe and arranged towards the direction close to the lower joint, a floating hoop inner sleeve contacted with the central pipe is arranged in the floating hoop, the floating hoop is connected with the inner floating hoop sleeve through a second pin, and a key is arranged at the contact position of the inner floating hoop sleeve and the central pipe.

Preferably, the packer further comprises a collar, the collar being sleeved on the central tube and located within the connection sleeve.

Preferably, the hydraulic sleeve assembly comprises a piston sealing sleeve, a spring and a hydraulic cylinder sleeve, the piston sealing sleeve is arranged on the central pipe, the spring is arranged in the piston sealing sleeve, and the hydraulic cylinder sleeve is arranged outside the piston sealing sleeve.

Preferably, a key slot is arranged at a section of the central tube close to the floating collar inner sleeve, and the key is located in the key slot.

Preferably, the center tube is cylindric, top connection, lower clutch, connecting cylinder, adapter sleeve, hydraulic pressure cover assembly, packing element assembly, float collar all are cylindric.

Preferably, the rubber cylinder assembly comprises an upper sheath, a steel belt, an inner rubber cylinder, an outer rubber cylinder and a lower sheath; the inner rubber cylinder is sleeved on the central tube, the outer rubber cylinder is sleeved on the inner rubber cylinder, and the steel belt is arranged between the inner rubber cylinder and the outer rubber cylinder. The steel belt is respectively connected with the upper sheath and the lower sheath, the upper sheath is connected with the hydraulic cylinder sleeve, and the lower sheath is connected with the float collar.

Compared with the prior art, the beneficial effects lie in that: after the packer is used up, the pipe column can be lifted up, the pin can be sheared to cut off the pin, and the rubber barrel assembly releases pressure to complete unsealing; when the upper lifting pipe column cannot be unsealed, the soluble floating hoop and the floating hoop inner sleeve can be dissolved, the rubber cylinder assembly can release pressure to complete unsealing, and smooth construction is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a cross-sectional view of the expandable packer provided by the present invention.

Reference numerals: 1. an upper joint; 2. a first pin; 3. a connecting cylinder; 4. a central tube; 5. a collar; 6. connecting sleeves; 7. a piston seal cartridge; 8. a spring; 9. a cylinder liner; 10, sheathing the sleeve; 11. a steel belt; 12. an inner rubber cylinder; 13. an outer rubber cylinder; 14. a lower sheath; 15. floating hoops; 16. a pressure relief screw; 17. a second pin; 18. a floating hoop inner sleeve; 19. a key; 20. and a lower joint.

Detailed Description

In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly understood, the present invention is further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration only and not by way of limitation.

It will be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

It is also noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," "disposed," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The above terms may have the specific meanings given in the present invention to those skilled in the art according to the specific circumstances.

Furthermore, the terms "left", "right", and "left" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Further, the meaning of "a plurality" or "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1, the present invention provides an expandable packer, which includes a central tube 4, an upper joint 1, a lower joint 20, a first pin 2, a connecting cylinder 3, a connecting sleeve 6, a hydraulic sleeve assembly, a rubber sleeve assembly, a floating hoop 15, a pressure relief screw 16, a second pin 17, a floating hoop inner sleeve 18, and a key 19; top connection 1 and lower clutch 20 cup joint respectively in the both ends of center tube 4, the one end that center tube 4 is close to top connection 1 has the inlet, connecting cylinder 3 cup joint in on the center tube 4 and through first pin 2 with top connection 1 is connected, adapter sleeve 6 cup joint in on the center tube 4 and with connecting cylinder 3 is connected, hydraulic pressure cover assembly cup joint in on the center tube 4 and with adapter sleeve 6 is connected, packing element assembly cup joint in on the center tube 4 and with hydraulic pressure cover assembly connects, just connecting cylinder 3, adapter sleeve 6, hydraulic pressure cover assembly and packing element assembly are located between top connection 1 and the lower clutch 20.

The floating hoop 15 is sleeved on the central pipe 4 and arranged in a direction close to the lower joint 20, a floating hoop inner sleeve 18 in contact with the central pipe 4 is arranged inside the floating hoop 15, the floating hoop 15 is connected with the floating hoop inner sleeve 18 through a second pin 17, and a key 19 is arranged at the contact position of the floating hoop inner sleeve 18 and the central pipe 4. In this embodiment, the first pin 2 and the second pin 17 are shear pins.

Further, the packer further comprises a sleeve ring 5, the sleeve ring 5 is sleeved on the central pipe 4 and is positioned in the connecting sleeve 6, and the sleeve ring 5 is abutted to the connecting cylinder 3. So, be convenient for the lantern ring 5 along with the center tube 4 in-process of lifting drives connecting cylinder 3 and moves upward, puts the packer out completely.

Further, hydraulic pressure cover assembly includes piston seal cover 7, spring 8 and liquid cylinder liner 9, piston seal cover 7 overlaps and locates on center tube 4, spring 8 install in piston seal cover 7, liquid cylinder liner 9 overlaps and locates the piston seal cover 7 is outside.

Furthermore, a key slot is arranged at a section of the central tube 4 close to the floating collar inner sleeve 18, and the key 19 is positioned in the key slot. In this way, the floating collar inner sleeve 18 is facilitated to move on the key groove of the central tube 4 through the key 19. In this embodiment, the key 19 is a round flat key.

Further, the center tube 4 is cylindrical, and the upper joint 1, the lower joint 20, the connecting cylinder 3, the connecting sleeve 6, the hydraulic sleeve assembly, the rubber cylinder assembly and the floating hoop 15 are all substantially cylindrical.

Further, the diameters of the upper joint 1, the lower joint 20, the connecting cylinder 3, the connecting sleeve 6, the hydraulic sleeve assembly, the rubber cylinder assembly and the floating hoop 15 are equal, so that the packer can be used in a narrow space when being put into a well.

Further, the rubber cylinder assembly comprises an upper sheath 10, a steel belt 11, an inner rubber cylinder 12, an outer rubber cylinder 13 and a lower sheath 14; the inner rubber tube 12 is sleeved on the central tube 4, the outer rubber tube 13 is sleeved on the inner rubber tube 12, and the steel belt 11 is arranged between the inner rubber tube 12 and the outer rubber tube 13. The steel belt 11 is respectively connected with the upper sheath 10 and the lower sheath 14, the upper sheath 10 is connected with the hydraulic cylinder sleeve 9, and the lower sheath 14 is connected with the float collar 15.

Expansion setting process

In the process of using in a well, the upper joint 1 is connected with an oil pipe, medium with pressure enters the connecting sleeve 6 from the upper joint 1 through the liquid inlet hole, the medium with pressure enters the piston sealing sleeve 7 and applies pressure to the piston sealing sleeve 7 to compress the spring 8, so that the piston sealing sleeve 7 is opened, the medium with pressure enters the inner rubber cylinder 12 to be continuously pressed, the inner rubber cylinder 12 radially expands, and then the lower sheath 14 is driven to move upwards and the lower sheath 14 drives the floating hoop 15 to move upwards in the radial expansion process of the steel belt 11 and the outer rubber cylinder 13 of the rubber cylinder assembly.

When the pressure medium is continuously pressurized to increase the pulling force of the floating collar 15, the second pin 17 is sheared off, and the floating collar inner sleeve 18 and the key 19 slide downwards at the key groove on the central tube 4;

when the medium with pressure continues to be pressurized, the outer rubber sleeve 13 expands to be tightly attached to the inner wall of the sleeve; when the pressure of the medium with pressure is reduced to a preset pressure, the spring 8 pushes the piston sealing sleeve 7 upwards to be attached to the connecting sleeve 6, and the setting process is completed.

Pressure release deblocking process

The first unsealing mode is as follows: in the process of releasing pressure and unsealing, the upper joint 1 is lifted up to reach a preset force value, the first pin 2 is sheared off, in the process of continuously lifting up, the central pipe 4 and the floating hoop 15 generate relative movement, and a key groove at the bottom of the central pipe 4 serves as a pressure relief groove; after the pressure relief is finished, the inner rubber cylinder 12 and the outer rubber cylinder 13 of the rubber cylinder assembly can contract radially and extend axially, the inner rubber cylinder 12 gradually separates from the inner wall of the casing in the well, and the action of pressure relief and unsealing is finished; meanwhile, the lantern ring 5 drives the connecting cylinder 3 to move upwards along with the lifting process of the central pipe 4, so that the packer can be completely lifted out.

And (2) a second deblocking mode: the floating hoop 15 and the floating hoop inner sleeve 18 are made of magnesium-aluminum alloy soluble metal, when the rubber sleeve expands and is set for a certain time, the floating hoop 15 and the floating hoop inner sleeve 18 are dissolved, the inner rubber sleeve 12 and the outer rubber sleeve 13 of the rubber sleeve assembly can radially contract and extend downwards, the inner rubber sleeve 12 is separated from the inner wall of a sleeve in a well, the unsealing action is completed, the central tube is lifted, and the lantern ring 5 drives the connecting tube 3 to move upwards along with the central tube 4 in the lifting process, so that the packer can be taken out.

The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. An expansion packer is characterized by comprising a central pipe (4), an upper joint (1), a lower joint (20), a connecting cylinder (3), a connecting sleeve (6), a hydraulic sleeve assembly, a rubber cylinder assembly, a floating hoop (15) and a floating hoop inner sleeve (18); the upper joint (1) and the lower joint (20) are respectively sleeved at two ends of the central pipe (4), a liquid inlet hole is drilled at one end, close to the connecting sleeve (6), of the central pipe (4), the connecting cylinder (3) is sleeved on the central pipe (4) and is connected with the upper joint (1) through a first pin (2), the connecting sleeve (6) is sleeved on the central pipe (4) and is connected with the connecting cylinder (3), the hydraulic sleeve assembly is sleeved on the central pipe (4) and is connected with the connecting sleeve (6), the rubber sleeve assembly is sleeved on the central pipe (4) and is connected with the hydraulic sleeve assembly, the connecting cylinder (3), the connecting sleeve (6), the hydraulic sleeve assembly and the rubber sleeve assembly are located between the upper joint (1) and the lower joint (20), the floating hoop (15) is sleeved on the central pipe (4) and is arranged towards the direction close to the lower joint (20), the floating hoop is characterized in that a floating hoop inner sleeve (18) in contact with the central pipe (4) is arranged inside the floating hoop (15), the floating hoop (15) is connected with the floating hoop inner sleeve (18) through a second pin (17), and a key (19) is arranged at the contact position of the floating hoop inner sleeve (18) and the central pipe (4).

2. An expandable packer according to claim 1, characterised in that it further comprises a collar (5), which collar (5) is placed on the base pipe and inside the connection sleeve (6).

3. The expandable packer according to claim 1, wherein the hydraulic sleeve assembly comprises a piston gland (7), a spring (8) and a hydraulic cylinder sleeve (9), the piston gland (7) is sleeved on the central tube (4), the spring (8) is installed in the piston gland (7), and the hydraulic cylinder sleeve (9) is sleeved outside the piston gland (7).

4. An expandable packer as claimed in claim 1, characterised in that the central tube (4) is provided with a key slot at a section near the inner float collar (18), the key (19) being located in the key slot.

5. An expandable packer according to claim 1, characterised in that the central tube (4) is cylindrical and that the upper joint (1), the lower joint (20), the connecting cylinder (3), the connecting sleeve (6), the hydraulic jacket assembly, the rubber sleeve assembly and the float collar (15) are cylindrical.

6. An expandable packer according to claim 1, wherein the packer assembly comprises an upper jacket (10), a steel belt (11), an inner packer element (12), an outer packer element (13) and a lower jacket (14); the inner rubber cylinder (12) is sleeved on the central pipe (4), the outer rubber cylinder (13) is sleeved on the inner rubber cylinder (12), and the steel belt (11) is arranged between the inner rubber cylinder (12) and the outer rubber cylinder (13).