CN217001775U

CN217001775U - High-temperature high-pressure packer with large expansion ratio

Info

Publication number: CN217001775U
Application number: CN202220807406.0U
Authority: CN
Inventors: 于旭莹; 仲福惟; 李福河; 丁凯
Original assignee: Qingdao Ruixin Petroleum Equipment Manufacturing Co ltd; Dongying Ruifeng Petroleum Technology Development Co ltd
Current assignee: Qingdao Ruixin Petroleum Equipment Manufacturing Co ltd; Dongying Ruifeng Petroleum Technology Development Co ltd
Priority date: 2022-04-08
Filing date: 2022-04-08
Publication date: 2022-07-19
Anticipated expiration: 2032-04-08

Abstract

The utility model relates to the technical field of oil extraction tools, in particular to a high-temperature and high-pressure packer with a large expansion ratio, which comprises an upper joint, a high-temperature check ring, a high-temperature sealing ring, a fastening pin, a sealing element, a central tube and a sliding adjusting mechanism, wherein the upper joint is axially fixed at the top end of the central tube through the fastening pin, the sealing element is axially sleeved on the whole body of the central tube, the sliding adjusting mechanism is axially arranged at the bottom end of the central tube, and the upper end part and the lower end part of the sealing element are respectively connected with the upper joint and the sliding adjusting mechanism, and the packer has the advantages that: the sliding adjusting mechanism is convenient for adjust the length difference between sealing member and the center tube, and the sliding adjusting mechanism also can reduce its axial tension after the sealing member expands, prevent that packing element axial tension is too big, cause the damage, there is a liquid outlet on the center tube, oil pipe pressure accessible liquid outlet gets into the inside expansion that makes of sealing member, and then realizes sealedly, and this sealing member enlarges the sleeve pipe that 60mm can seal up big latus rectum, and it can withstand voltage 70Mpa, temperature resistant 180 ℃.

Description

High-temperature high-pressure packer with large expansion ratio

Technical Field

The utility model relates to an underground tool for oil extraction, in particular to a large-expansion-ratio high-temperature high-pressure packer.

Background

At the initial stage of oilfield development, after drilling is completed, a casing is put into the well and needs cement for well cementation, at the moment, a high-temperature-resistant packer which can have a large expansion ratio and can resist high pressure is needed, and the existing packer cannot meet the large expansion ratio and has the capacity of resisting high temperature and high pressure.

When open hole fracturing is carried out, after the conventional packer is expanded and sealed, the bottom layer pressure is possibly broken due to anchoring structures such as slips, the well wall is damaged, and collapse is caused; the packer without the anchoring structure is easy to force the packer to axially move due to the action of differential pressure, so that the sealing element is damaged; when the bottom layer is used for leakage finding or water plugging, the packer needs to seal the large inner diameter through the small inner diameter.

SUMMERY OF THE UTILITY MODEL

The utility model provides a high-temperature and high-pressure packer with a large expansion ratio, which can provide a high-temperature and high-pressure resistant high-performance packer during well cementation, can reduce the damage to the wall of an open hole well in the fracturing process, and can provide a certain anchoring force, and the specific implementation mode is as follows:

the utility model provides a big expansion ratio high temperature high pressure packer, includes top connection, high temperature retaining ring, high temperature sealing washer, tightly decides the pin, sealing member, center tube and slide adjusting mechanism, and the top of center tube is through tightly deciding pin axial fixity and having the top connection, and its whole body axial cover is equipped with the sealing member, and its bottom axial is equipped with slide adjusting mechanism, and the upper and lower tip of sealing member is connected with top connection and slide adjusting mechanism respectively.

The sealing member can reduce the damage to the bore hole wall of a well to can provide certain anchoring force, it is connected to form through vulcanizing by sealing member connector, sealing steel band and high temperature rubber, and high temperature rubber's the outside sets up to sealing steel band, and the equal axial in upper and lower both ends of sealing steel band and high temperature rubber is equipped with the sealing member connector.

Further, the bottom of the upper joint is provided with an external thread, the sealing element connector is inwards arranged to be of a threaded structure, the upper joint is axially screwed with the sealing element connector close to one side of the upper joint, and a high-temperature check ring and a high-temperature sealing ring are axially sleeved between the upper joint and the sealing element connector.

The sliding adjusting mechanism can effectively prevent the sealing element from tearing when the high-pressure seal expands, and comprises a sliding joint, a lower joint, an anti-collision ring and a copper pin, wherein the lower joint is axially fixed at the bottom end of the central tube, the anti-collision ring is axially connected with the sliding joint, and the anti-collision ring is radially connected with the lower joint through the copper pin.

Furthermore, the top of the sliding joint is provided with an external thread, and the sliding joint is screwed on the sealing element connector far away from one side of the upper joint.

Furthermore, a plurality of diversion trenches and liquid outlet holes are designed on the central tube.

Due to the adoption of the technical scheme, the utility model has the beneficial technical effects that:

1. the large-expansion-ratio high-temperature and high-pressure high-temperature packer can realize high-temperature and high-pressure well conditions, and meanwhile, the sealing steel belt can provide a certain anchoring force, so that the axial movement of the packer caused by pressure difference is avoided, a sealing element can be effectively protected, and the sealing life is prolonged;

2. when the bottom layer is used for finding leakage or plugging water, the utility model can realize the well condition, and the large-inner-diameter casing can be sealed by expanding after reaching the target layer through the small-size inner diameter;

3. the sliding adjusting mechanism is convenient for adjusting the length difference between the sealing element and the central pipe, and the sliding adjusting mechanism can also reduce the axial tension of the sealing element after the sealing element is expanded, so that the rubber cylinder is prevented from being damaged due to overlarge axial tension.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the structure of the present invention;

FIG. 3 is a schematic view of the seal of the present invention;

FIG. 4 is a cross-sectional view of the seal construction of the present invention;

FIG. 5 is a cross-sectional view of a structure of the present invention;

FIG. 6 is an enlarged view of portion A of FIG. 5 in accordance with the present invention;

fig. 7 is an enlarged view of the structure of part B of fig. 5 according to the present invention.

Description of reference numerals:

1. the sealing device comprises an upper joint, 2, a high-temperature retainer ring, 3, a high-temperature sealing ring, 4, a fastening pin, 5, a sealing piece connector, 6, a sealing steel belt, 7, high-temperature rubber, 8, a central pipe, 9, a sliding joint, 10, a lower joint, 11, an anti-collision ring, 12 and a copper pin.

Detailed Description

The following description of the embodiments of the present invention refers to the accompanying drawings and examples:

it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and any modifications of the structures, changes in the proportions and adjustments of the sizes, without affecting the efficacy and attainment of the same, are intended to fall within the scope of the present disclosure.

In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Embodiment 1, combine fig. 1 and fig. 2, this embodiment provides a big expansion ratio high temperature high pressure packer, including top connection 1, high temperature retaining ring 2, high temperature sealing washer 3, tight set pin 4, sealing member and center tube 8, the sealing member can be used to the cementing cement, also can be used to the packer between the water injection well layer or be used for the layering fracturing of open hole well, also can be used to processes such as water exploration leaking stoppage, can effectively utilize the undersize latus rectum to carry out the sealed of big internal diameter well condition.

With reference to fig. 5 and 6, the top end of the central tube 8 is axially fixed with the upper joint 1 through the fastening pin 4, the whole body of the central tube is axially sleeved with a sealing element, the bottom end of the central tube 8 is axially provided with a sliding adjusting mechanism, the upper end and the lower end of the sealing element are respectively connected with the upper joint 1 and the sliding adjusting mechanism, and the central tube 8 in the structure is provided with a plurality of liquid outlet holes.

With reference to fig. 3 and 4, the sealing element is composed of a sealing element connector 5, a sealing steel strip 6 and high-temperature rubber 7 which are connected through vulcanization, the sealing steel strip 6 is arranged on the outer side of the high-temperature rubber 7, and the sealing element connectors 5 are axially arranged at the upper end and the lower end of the sealing steel strip 6 and the high-temperature rubber 7 respectively; the sealing steel belt 6 and the high-temperature rubber 7 form a rubber cylinder, namely, the upper end and the lower end of the rubber cylinder are provided with sealing element connectors 5.

With reference to fig. 5 and 6, the bottom of the upper joint 1 is provided with an external thread, the sealing element connector 5 is arranged inwards to form a thread structure, the upper joint 1 is axially screwed with the sealing element connector 5 close to one side of the upper joint 1, and a high-temperature retainer ring 2 and a high-temperature sealing ring 3 are axially sleeved between the upper joint 1 and the sealing element connector 5.

In the implementation process, the packer is vertically connected to the oil pipe, the packer is vertically lowered to a specified position, and the oil pipe is used for setting the packer through pressing. At the moment, liquid enters the interior of the sealing element from the liquid outlet hole of the central tube 8, so that the sealing element is sealed in an expanding way; at the moment, the high-temperature rubber 7 and the sealing steel belt 6 are attached to the inner wall of the sleeve, and the high-temperature rubber 7 achieves a sealing effect; when the pressure of the oil pipe is more than 2MPa, the sealing element expands outwards to the inner wall of the casing pipe, so that sealing is realized, and meanwhile, the sealing steel strip 6 is in contact with the inner wall of the casing pipe to provide certain anchoring force so as to prevent the packer from axially moving under the action of pressure difference and further damage the packer.

Embodiment 2 combines fig. 1 and 2, and this embodiment still provides a big expansion ratio high temperature and high pressure packer, still includes sliding adjustment mechanism, and the bottom axial of center tube 8 is equipped with sliding adjustment mechanism, and the lower tip of sealing member is connected with sliding adjustment mechanism, and the design has a plurality of guiding gutter on the center tube 8, makes the device can effectively be applicable to high temperature high pressure well condition through sliding adjustment mechanism in this structure.

With reference to fig. 5 and 7, the sliding adjusting mechanism is composed of a sliding joint 9, a lower joint 10, an anti-collision ring 11 and a copper pin 12, the lower joint 10 is axially fixed at the bottom end of the central tube 8, the anti-collision ring 11 is axially connected with the sliding joint 9, the anti-collision ring 11 is radially connected with the lower joint 10 through the copper pin 12, the top of the sliding joint 9 in the structure is provided with an external thread, and the sliding joint 9 is connected with the sealing element connector 5 at one side far away from the upper joint 1 through a thread; the anti-collision ring 11 is connected with the sliding joint 9, so that the sealing steel belt 6 and the high-temperature rubber 7 can be prevented from being excessively expanded and sealed downwards in the axial direction; the copper pin 12 can control the pressure of the sealing steel belt 6 and the high-temperature rubber 7 which start to move in the sealing expansion process.

When the setting pressure of the packer exceeds 10Mpa, the implementation process is as follows: the copper pin 12 is sheared by pressure at the moment to provide a moving space for the sealing element; when the pressure is continuously increased, the rubber cylinder formed by the sealing steel belt 6 and the high-temperature rubber 7 continuously expands in the circumferential direction, so that the bottom of the rubber cylinder moves upwards in the axial direction; at the moment, the central tube 8 and the lower joint 10 are fixed in position, and the anti-collision ring 11 and the sliding joint 9 move upwards relative to the lower joint 10 along the axial direction of the rubber cylinder so as to prevent the rubber cylinder from being torn until the setting pressure required by construction is reached; when the deblocking, unload oil pipe pressure, the liquid accessible guiding gutter on the center tube 8 in the sealing member gets into out the liquid hole, makes the sealing member retrieve, realizes the deblocking.

Many other changes and modifications can be made without departing from the spirit and scope of the utility model. It is to be understood that the utility model is not to be limited to the specific embodiments, but only by the scope of the appended claims.

Claims

1. A high-temperature high-pressure packer with large expansion ratio comprises an upper joint (1), a high-temperature retainer ring (2), a high-temperature sealing ring (3), a fastening pin (4), a sealing element, a central pipe (8) and a sliding adjusting mechanism, and is characterized in that,

the top of center tube (8) is through holding up pin (4) axial fixity have top connection (1), and its whole body axial cover is equipped with the sealing member, and its bottom axial is equipped with slide adjusting mechanism, and the upper and lower tip of sealing member is connected with top connection (1) and slide adjusting mechanism respectively.

2. The high-temperature high-pressure packer with the large expansion ratio as claimed in claim 1, wherein the sealing element is formed by connecting a sealing element connector (5), a sealing steel belt (6) and high-temperature rubber (7) through vulcanization, the sealing steel belt (6) is arranged on the outer side of the high-temperature rubber (7), and the sealing element connectors (5) are axially arranged at the upper end and the lower end of each of the sealing steel belt (6) and the high-temperature rubber (7).

3. The high-temperature high-pressure packer with the large expansion ratio as claimed in claim 2, wherein an external thread is arranged at the bottom of the upper joint (1), the sealing element connector (5) is arranged inwards in a threaded structure, the upper joint (1) is axially screwed with the sealing element connector (5) close to one side of the upper joint (1), and a high-temperature retainer ring (2) and a high-temperature sealing ring (3) are axially sleeved between the upper joint (1) and the sealing element connector.

4. A high-temperature high-pressure packer with large expansion ratio as claimed in claim 1, characterized in that the sliding adjusting mechanism is composed of a sliding joint (9), a lower joint (10), an anti-collision ring (11) and a copper pin (12),

lower clutch (10) axial fixation is in the bottom of center tube (8), anticollision ring (11) and sliding joint (9) axial connection, and through copper pin (12) radial connection between anticollision ring (11) and lower clutch (10).

5. A high-temperature and high-pressure packer with a large expansion ratio as claimed in claim 4, characterized in that the top of the slip joint (9) is provided with external threads, and the slip joint (9) is screwed to the sealing element connector (5) on the side far away from the upper joint (1).

6. A high-temperature high-pressure packer with large expansion ratio as claimed in claim 1, characterized in that the central tube (8) is designed with a plurality of diversion trenches and liquid outlet holes.