CN216381312U - External packer for casing - Google Patents
External packer for casing Download PDFInfo
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- CN216381312U CN216381312U CN202122602725.6U CN202122602725U CN216381312U CN 216381312 U CN216381312 U CN 216381312U CN 202122602725 U CN202122602725 U CN 202122602725U CN 216381312 U CN216381312 U CN 216381312U
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- valve body
- cushion
- inner chamber
- cushion layer
- wall
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Abstract
The utility model relates to the technical field of packers for plugging oil-water wells, and discloses a casing pipe outer packer which comprises an upper joint, wherein a central pipe is arranged at the bottom of the upper joint, a valve body is arranged at the bottom of the central pipe, a rubber cylinder is arranged at the bottom of the valve body, a sealing device is arranged inside the valve body, a buffer device is arranged on the side surface of the sealing device, the buffer device comprises an adjusting cavity, a buffer cushion layer, an inner cavity, a connecting piece, a spring and a buffer cavity, and the inner cavity is fixedly connected to the inner bottom of the valve body. This outer packer of sleeve pipe is provided with regulation chamber and cushion simultaneously, and when inner chamber internal pressure was higher than inner chamber external pressure, the condition of expansion appeared in the inner chamber, when the expansion, to both sides extrusion cushion, with the cushion compression to make cushion's both sides and packing element and inner chamber closely laminate, when pressure is certain, the condition that remains the laminating throughout can play the effect of buffering, reaches long-time sealed effect, guarantees the device packing nature.
Description
Technical Field
The utility model relates to the technical field of packers for plugging oil-water wells, in particular to an external packer for a casing.
Background
At present, the casing packer is widely applied to oil and gas well cementing or well completion tools in the oil and gas industry, the construction of oil and gas well cementing is more and more carried out in pressure-sensitive ground type stratums, in order to ensure the well cementing quality of the type of wells, the casing packer is used, oil, gas and water are prevented or controlled from channeling mutually by means of the mechanical mode of the casing packer, therefore, the circular flushing and slurry mixing are ensured after the well cementing, no well leakage or gas channeling occurs in the slurry leading process, and when the pressure in a rubber cylinder is higher than the pressure outside the rubber cylinder, the rubber cylinder expands outwards to seal the annular space of the oil casing.
When the sealing outer packer is used, the rubber sleeve can be expanded outwards to realize an oil sleeve annular space, but the existing sealing outer packer is not provided with a device for helping the rubber sleeve to recover, cannot recover to the original state after the rubber sleeve is expanded, is inconvenient to use and needs to be improved.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a casing external packer to solve the above problems in the background art.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a sleeve pipe external packer, includes the top connection, the bottom of top connection is provided with the center tube, the bottom of center tube is provided with the valve body, the bottom of valve body is provided with the packing element, the inside of valve body is provided with sealing device, sealing device's side is provided with buffer.
Buffer is including adjusting chamber, cushion, inner chamber, connecting piece, spring and cushion, inner chamber fixed connection is in the interior bottom of valve body, it sets up in the surface of inner chamber to adjust the chamber, the both sides of cushion are connected respectively in the both sides of packing element and inner chamber, the inside of cushion is seted up to the cushion in the cushion, connecting piece fixed connection is in the inner wall left side of cushion, the both sides of spring are fixed connection respectively in the side of connecting piece and packing element, through being provided with cushion, can be when pressure is fixed, with the condition that packing element and inner chamber remain the laminating throughout, can play the effect of buffering, reach long-time sealed effect.
Preferably, sealing device includes seal receptacle, joint groove, piston, sealing member and sealed draw-in groove, seal receptacle fixed connection is in the inner wall both sides of inner chamber, the top of seal receptacle is seted up in the joint groove, piston sliding connection is in the inner wall of center tube, sealed draw-in groove sets up the bottom of seal receptacle, the sealing member is connected in sealed draw-in groove's inside.
Preferably, the outer surface of the rubber cylinder is provided with a casing collar locator, and the casing collar locator is arranged, so that the rubber cylinder can be located when the assembling device is used, the accuracy of the assembling position is ensured, and the using effect is enhanced.
Preferably, a rectangular cavity is arranged between the sealing clamping groove and the clamping groove in the sealing seat.
Preferably, the left side fixed connection of cushion layer is on the outer wall right side of inner chamber, the right side fixed connection of cushion layer is on the inner wall right side of valve body, is provided with cushion layer simultaneously, can play the effect of buffering and reinforcing leakproofness.
Preferably, the left side fixed connection of spring is on the right side of connecting piece, the right side fixed connection of spring is on the inner wall right side of valve body, and through being provided with the spring, the spring recovers after being compressed, can drive the inner chamber and reset, can protect the inner chamber, increases the life of inner chamber.
Preferably, adjust the chamber and offer between the inner wall and the inner chamber of valve body, be provided with simultaneously and adjust the chamber, adjust the chamber and can place the cushion, provide the space for placing of cushion.
Compared with the prior art, the utility model has the beneficial effects that:
1. this outer packer of sleeve pipe is provided with regulation chamber and cushion simultaneously, and when inner chamber internal pressure was higher than inner chamber external pressure, the condition of expansion appeared in the inner chamber, when the expansion, to both sides extrusion cushion, with the cushion compression to make cushion's both sides and packing element and inner chamber closely laminate, when pressure is certain, the condition that remains the laminating throughout can play the effect of buffering, reaches long-time sealed effect, guarantees the device packing nature.
2. This outer packer of sleeve pipe through being provided with spring and connecting piece, appears changing when the internal pressure of inner chamber and external pressure, and when internal pressure was less than the external pressure, the inner chamber disappeared to the extrusion force of both sides, and the spring restores to the original state gradually, can drive the inner chamber at the recovery in-process and get back to the normal position, guarantees its usability.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic front sectional view of the present invention;
FIG. 3 is a schematic view of an elevational section and a sectional structure of the valve body of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 2 according to the present invention.
In the figure: 1. an upper joint; 2. a central tube; 3. a valve body; 4. a casing collar locator; 5. a rubber cylinder; 6. a sealing device; 601. a sealing seat; 602. a clamping groove; 603. a piston; 604. a seal member; 605. sealing the clamping groove; 7. a buffer device; 701. an adjustment chamber; 702. a cushion layer; 703. an inner cavity; 704. a connecting member; 705. a spring; 706. a buffer chamber.
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.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, 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 specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-4, the present invention provides a technical solution: the utility model provides a sleeve pipe outer packer, includes top connection 1, the bottom of top connection 1 is provided with center tube 2, the bottom of center tube 2 is provided with valve body 3, the bottom of valve body 3 is provided with packing element 5, the inside of valve body 3 is provided with sealing device 6, sealing device 6's side is provided with buffer 7, packing element 5's surface is provided with casing coupling locator 4, through being provided with casing coupling locator 4, can fix a position when assembly quality, ensure assembly position's accuracy, reinforcing result of use.
The buffer device 7 comprises an adjusting cavity 701, a cushion layer 702, an inner cavity 703, a connecting piece 704, a spring 705 and a buffer cavity 706, wherein the inner cavity 703 is fixedly connected to the inner bottom of the valve body 3, the adjusting cavity 701 is arranged on the outer surface of the inner cavity 703, the adjusting cavity 701 is arranged between the inner wall of the valve body 3 and the inner cavity 703, the adjusting cavity 701 is also arranged, the adjusting cavity 701 can place the cushion layer 702 to provide a space for placing the cushion layer 702, two sides of the cushion layer 702 are respectively connected to two sides of the rubber sleeve 5 and the inner cavity 703, the left side of the cushion layer 702 is fixedly connected to the right side of the outer wall of the inner cavity 703, the right side of the cushion layer 702 is fixedly connected to the right side of the inner wall of the valve body 3, the cushion layer 702 is also arranged to play roles of buffering and enhancing the sealing performance, the buffer cavity 706 is arranged in the cushion layer 702, and the connecting piece 704 is fixedly connected to the left side of the inner wall of the cushion layer 702, both sides of spring 705 are fixed connection in the side of connecting piece 704 and packing element 5 respectively, and the left side fixed connection of spring 705 is in the right side of connecting piece 704, and the right side fixed connection of spring 705 is on the inner wall right side of valve body 3, and through being provided with spring 705, spring 705 recovers after being compressed, can drive inner chamber 703 and reset, can protect inner chamber 703, increases inner chamber 703's life.
The working principle of the utility model is as follows: when the rubber tube is used, when the pressure in the inner cavity 703 inside the rubber tube 5 is higher than the pressure outside the inner cavity 703, the inner cavity 703 expands, when the inner cavity 703 expands, the inner wall of the inner cavity 703 moves to both sides to press the cushion layer 702 to both sides to generate pressing forces to both sides, the spring 705 inside the cushion layer 702 is pressed to compress the spring 705, after the spring 705 is compressed, because both sides of the cushion layer 702 are in contact with the inner wall of the rubber tube 5 and the outer wall of the inner cavity 703, the cushion layer 702 is also compressed to make both sides of the cushion layer 702 more closely fit with the rubber tube 5 and the inner cavity 703, when the pressure is protected for a certain time, the condition of fitting can be always kept, the buffering effect can be achieved, the sealing effect and the sealing performance and the packing performance of the device are ensured, when the pressure in the inner cavity 703 inside the rubber tube 5 is lower than the pressure outside the inner cavity 703, the outward expansion force of the inner cavity 703 disappears, the extrusion force on the two sides of the spring 705 box disappears, and the spring 705 gradually returns to drive the inner cavity 703 to return to the original position, so that the inner cavity 703 can be restored, and the service life of the inner cavity is ensured.
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 utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a sleeve pipe external packer, includes top connection (1), its characterized in that: a central pipe (2) is arranged at the bottom of the upper joint (1), a valve body (3) is arranged at the bottom of the central pipe (2), a rubber cylinder (5) is arranged at the bottom of the valve body (3), a sealing device (6) is arranged inside the valve body (3), and a buffering device (7) is arranged on the side surface of the sealing device (6);
buffer (7) are including adjusting chamber (701), cushion layer (702), inner chamber (703), connecting piece (704), spring (705) and cushion chamber (706), inner chamber (703) fixed connection is in the interior bottom of valve body (3), it sets up in the surface of inner chamber (703) to adjust chamber (701), the both sides of cushion layer (702) are connected respectively in the both sides of packing element (5) and inner chamber (703), the inside of cushion layer (702) is seted up in cushion layer (706), connecting piece (704) fixed connection is on the left of the inner wall of cushion layer (702), the both sides of spring (705) are fixed connection respectively in the side of connecting piece (704) and packing element (5).
2. The external casing packer of claim 1, wherein: sealing device (6) include seal receptacle (601), joint groove (602), piston (603), sealing member (604) and sealed draw-in groove (605), seal receptacle (601) fixed connection is in the inner wall both sides of inner chamber (703), the top of seal receptacle (601) is seted up in joint groove (602), piston (603) sliding connection is in the inner wall of center tube (2), the bottom of seal receptacle (601) is seted up in sealed draw-in groove (605), sealing member (604) are connected in the inside of sealed draw-in groove (605).
3. The external casing packer of claim 1, wherein: and a casing collar locator (4) is arranged on the outer surface of the rubber cylinder (5).
4. The external casing packer of claim 2, wherein: a rectangular cavity is arranged between the sealing clamping groove (605) and the clamping groove (602) in the sealing seat (601).
5. The external casing packer of claim 1, wherein: the left side of the cushion layer (702) is fixedly connected to the right side of the outer wall of the inner cavity (703), and the right side of the cushion layer (702) is fixedly connected to the right side of the inner wall of the valve body (3).
6. The external casing packer of claim 1, wherein: the left side of the spring (705) is fixedly connected to the right side of the connecting piece (704), and the right side of the spring (705) is fixedly connected to the right side of the inner wall of the valve body (3).
7. The external casing packer of claim 1, wherein: the adjusting cavity (701) is arranged between the inner wall of the valve body (3) and the inner cavity (703).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122602725.6U CN216381312U (en) | 2021-10-28 | 2021-10-28 | External packer for casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122602725.6U CN216381312U (en) | 2021-10-28 | 2021-10-28 | External packer for casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216381312U true CN216381312U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122602725.6U Active CN216381312U (en) | 2021-10-28 | 2021-10-28 | External packer for casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216381312U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024000901A1 (en) * | 2022-07-01 | 2024-01-04 | 昊星宇(天津)科技发展有限公司 | Compression type packer sealing member |
-
2021
- 2021-10-28 CN CN202122602725.6U patent/CN216381312U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024000901A1 (en) * | 2022-07-01 | 2024-01-04 | 昊星宇(天津)科技发展有限公司 | Compression type packer sealing member |
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