CN219888018U - Soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation - Google Patents
Soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation Download PDFInfo
- Publication number
- CN219888018U CN219888018U CN202321371037.6U CN202321371037U CN219888018U CN 219888018 U CN219888018 U CN 219888018U CN 202321371037 U CN202321371037 U CN 202321371037U CN 219888018 U CN219888018 U CN 219888018U
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- ring
- metal sealing
- soluble
- ball seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 173
- 239000002184 metal Substances 0.000 claims abstract description 111
- 229910052751 metal Inorganic materials 0.000 claims abstract description 111
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- 125000006850 spacer group Chemical group 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000005192 partition Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Sealing Devices (AREA)
Abstract
The utility model discloses a soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation, relates to the technical field of unconventional oil and gas exploitation and aims to solve the problem that an existing soluble bridge seat is not tightly sealed; the soluble ball seat is composed of an integral slip matrix and a triple sealing structure, and a partition ring, a lower metal sealing ring, a soluble rubber sealing ring, an upper metal sealing ring, a U-shaped metal sealing ring and an elliptic soluble rubber ring are sleeved on a sliding body of the soluble ball seat in sequence; the ball seat is sealed by adopting a heavy spacing ring, a double metal sealing ring is combined with a soluble rubber sealing ring to seal, and a triple U-shaped metal sealing ring is combined with an elliptic soluble rubber sealing ring to seal, so that the sealing performance of the ball seat is greatly improved on the basis of the pressure-bearing grade requirement of the soluble ball seat.
Description
Technical Field
The utility model relates to the technical field of unconventional oil and gas exploration and development, in particular to a soluble ball seat sealing device suitable for unconventional oil and gas exploitation.
Background
With the increase of the external dependence of oil gas resources in China, the conventional oil gas resources can not meet the production and living demands in China, the exploration and development forces of the oil gas resources are increased, the oil gas yield is improved, and the unconventional resources represented by shale gas and compact oil gas gradually become the main force of oil gas production.
Horizontal well volume staged fracturing is a key technology for unconventional tight hydrocarbon recovery. The soluble ball seat has the characteristics of quick solubility, full-diameter production, simple construction process and the like, is rapidly popularized in the volumetric staged fracturing construction operation, and brings about revolutionary progress of the staged multi-cluster fracturing technology of the horizontal well. In the prior art, a soluble ball seat is usually sealed by adopting all metals, the volume staged fracturing underground operation is often in severe environments such as high temperature, high pressure, heavy load, strong corrosion and the like, and the metal sealing ring is easy to break in a body structure under a setting working condition, and the sealing failure and the like in the fracturing process are caused. The failure of the setting of the soluble ball seat causes the leakage of fracturing fluid with poor intersegmental sealing, the hydraulic energy loss of fracturing among clusters is overlarge, the fracturing operation fails, and even underground accidents are caused.
Therefore, based on the above situation, we provide a soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation, and the soluble ball seat performs performance optimization on the basis of an all-metal soluble ball seat, so as to solve the problems of loose sealing and the like.
Disclosure of Invention
The utility model aims to provide a soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation, which solves the problems of low intersegmental sealing, leakage of fracturing fluid, overlarge interscluster fracturing hydraulic energy loss and the like caused by metal sealing failure of a soluble ball seat.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides a soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation, which adopts a single slip structure and an embedded slip block, and utilizes three sealing structures of a spacer ring, a metal sealing ring combined with a soluble rubber sealing ring and a U-shaped metal sealing ring combined with an elliptic soluble rubber ring to overcome the defect of insufficient sealing of the existing pure metal soluble ball seat, realize effective setting of the soluble ball seat and effectively ensure the improvement of oil and gas exploitation efficiency.
The technical scheme adopted by the utility model is as follows:
in order to achieve the aim, the utility model provides a soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation, which comprises a sliding body, a slip base body and an anti-collision ring which are sequentially connected from top to bottom, wherein the sliding body is sequentially sleeved with an upper U-shaped metal sealing ring, an elliptic soluble rubber ring, an upper metal sealing ring, a soluble rubber sealing ring, a lower metal sealing ring, a spacer ring and a locking sleeve, and the slip base body is axially provided with a double-layer embedded slip block.
Furthermore, a spacer ring is added between the slip base body and the sealing ring, so that the acting force generated by the diameter expansion of the slip base body uniformly acts on the upper metal sealing ring and the lower metal sealing ring, the contact stress between the upper metal sealing ring and the lower metal sealing ring is reduced, and the safety of the metal sealing ring structure is protected.
Furthermore, a spacer ring is added between the slip base body and the sealing ring, the spacer ring expands to the outer surface to be in contact with the inner wall of the sleeve, and the spacer ring has a sealing effect to realize the first-step sealing of the soluble ball seat.
Further, the sealing ring adopts an upper metal sealing ring and a lower metal sealing ring split sealing ring, numerical analysis is combined, and compared with an integral type metal sealing ring, the upper metal sealing ring and the lower metal sealing ring are easier to expand in diameter and are not easy to damage in the setting process.
Further, a soluble rubber sealing ring is placed at a gap between the upper metal sealing ring and the lower metal sealing ring, the diameter of the metal sealing ring is expanded until the outer surface of the metal sealing ring contacts with the inner wall of the sleeve, and the metal sealing is combined with the rubber sealing to achieve the second-step sealing of the soluble ball seat.
Further, a U-shaped metal sealing ring and an elliptic soluble rubber ring are added at the tail part of the sliding body, when the diameter of the metal sealing ring is enlarged to the maximum diameter, the upper metal sealing ring and the lower metal sealing ring extrude the U-shaped metal sealing ring, and the U-shaped metal sealing ring and the soluble rubber ring extrude and deform to be in contact with the inner wall of the sleeve, so that the third-step sealing of the soluble ball seat is realized.
Further, the three-step sealing structure interacts with each other to seal together, so that the sealing performance of the soluble ball seat is enhanced.
Further, the left protrusion of the left end face sliding body of the U-shaped sealing ring is contacted, so that the axial displacement of the sealing structure of the soluble ball seat is limited, and the effective sealing of the sealing device structure is realized.
The beneficial effects are that:
compared with the prior art, the utility model has the following beneficial effects:
1. compared with the existing market pure metal soluble ball seat, the three-layer sealing structure of the soluble ball seat adopts the three-layer sealing structure of the spacer ring, the soluble rubber sealing ring and the metal sealing ring and the U-shaped metal sealing ring and the elliptic soluble rubber ring, effectively avoids the problem of insufficient sealing performance caused by mutual interference of an anchoring framework and a sealing structure in the setting process, and greatly increases the sealing performance of the soluble ball seat on the basis of ensuring the pressure-bearing grade requirement.
2. According to the utility model, the spacing ring structure is added at the right end of the metal sealing ring, so that the acting force generated by the diameter expansion of the slip base body uniformly acts on the metal sealing ring, the contact stress between the slip base body and the metal sealing ring is reduced, the safety of the metal sealing ring structure is protected, and the spacing ring contacts with the inner wall of the sleeve after the diameter expansion to realize the first-step sealing.
3. According to the split type metal sealing ring disclosed by the utility model, the integral type metal sealing ring is replaced by the split type metal sealing ring, and through numerical calculation and test, compared with the integral type metal sealing ring, the split type metal sealing ring is larger in bearing stress and difficult to damage in the diameter expanding process, so that the split type metal sealing ring is selected as a ball seat sealing structure, and the integral sealing pressure-bearing performance of the soluble ball seat is improved.
4. The soluble ball seat is sealed by combining the metal sealing ring and the soluble rubber sealing ring, the metal sealing ring expands the diameter under the action of the slip matrix in the setting process of the soluble ball seat, and when the outer surface of the metal sealing ring is contacted with the inside of the sleeve, the metal sealing ring and the soluble rubber sealing ring are combined together for sealing in the second step of the soluble ball seat.
5. The soluble ball seat adopts a third sealing mode that the U-shaped metal sealing ring and the elliptic soluble rubber ring form the soluble ball seat, the metal sealing ring expands the diameter by the acting force of the slip matrix in the setting process of the soluble ball seat, when the diameter of the soluble ball seat is expanded to the maximum diameter, the metal sealing ring extrudes the U-shaped metal sealing ring and the elliptic soluble rubber ring, the U-shaped metal sealing ring and the soluble rubber ring are pressed and deformed, the third sealing of the U-shaped metal sealing ring and the soluble rubber ring is achieved, and the three-step sealing mode is combined, so that the whole sealing pressure-bearing performance of the soluble ball seat is greatly improved.
Drawings
FIG. 1 is a schematic illustration of a soluble tee structure;
FIG. 2 is a schematic diagram of a soluble ball seat release structure;
FIG. 3 is a schematic diagram of a combination seal of an upper metal seal ring, a lower metal seal ring, and a soluble rubber seal ring;
FIG. 4 is a schematic view of a U-shaped metal seal ring and oval-shaped soluble rubber ring combined seal.
Detailed Description
The following is a complete description of the technical scheme in the embodiment of the utility model with reference to the accompanying drawings:
referring to fig. 1, 2, 3 and 4, a soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation comprises a soluble ball 1, a releasing pull rod 14, a sliding body 2, a U-shaped metal sealing ring 3, a soluble rubber ring 4, an upper metal sealing ring 5, a soluble ball rubber sealing ring 6, a lower metal sealing ring 7, a spacer ring 8, a slip base body 9, an embedded slip block 10, a locking sleeve 11, an anti-collision ring 12 and a shearing pin 13, wherein the outer ring surface of the locking sleeve 10 is matched with the inner ring surface of the sliding body 2; the slip matrix 7 is axially fitted with two layers of embedded slip segments 8.
The right end face of the spacer ring 8 is in plane fit with the left end face of the slip matrix 9, after the soluble ball seat is set, the slip matrix 9 is opened along the radial direction, the C-shaped opening structure of the slip matrix 9 generates a tearing force on the spacer ring 8 in the diameter expanding process, and the upper metal sealing ring 5 and the lower metal sealing ring 7 are protected by the spacer ring 8. The axial force borne by the spacer ring 8 is transmitted to the left end face of the lower metal sealing ring 7 through the right end face, the left end face of the lower metal sealing ring 7 is transmitted to the right end face of the upper metal sealing ring 5, and the spacer ring 8 structure ensures that the upper metal sealing ring 7 and the lower metal sealing ring 5 are not directly acted by the slip matrix 7 in the diameter expanding process to cause structural deformation. The spacer ring 8 contacts the inner wall of the sleeve after expanding to form a first-step seal of the soluble ball seat.
The upper metal sealing ring 5 and the lower metal sealing ring 7 gradually expand in diameter under the expansion force action of the slip matrix 9 transmitted by the spacer ring 8, and when the upper metal sealing ring 5 and the lower metal sealing ring 7 are in contact with the inner wall of the sleeve, the upper metal sealing ring 5 and the lower metal sealing ring 7 are in combined action with the soluble rubber sealing ring 6 to form a second-step seal of the soluble ball seat.
When the diameters of the upper metal sealing ring 5 and the lower metal sealing ring 7 are expanded to the maximum diameter of the sliding body, the left end face of the upper metal sealing ring 5 can be contacted with the right end face of the U-shaped metal sealing ring 3, the U-shaped metal sealing ring 3 and the elliptic soluble rubber ring 4,U are extruded by the upper metal sealing ring 5 and the lower metal sealing ring 7, and the elliptic soluble rubber ring 4 is extruded and deformed to be contacted with the inner wall of the sleeve, so that the third-step sealing is formed. The three sealing structures act together, so that the sealing performance of the soluble ball seat is greatly enhanced.
The locking sleeve 11 is connected with the anti-collision ring 12 through threads, the anti-collision ring 12 is stressed by the releasing pull rod 14 to press the slip matrix 9, the spacer ring 8, the upper metal sealing ring 5 and the lower metal sealing ring 7 backwards, the locking sleeve 11 is driven to move backwards, and when the locking sleeve moves to the inner diameter reducing position of the sliding body 2, the embedded slip blocks 8 bite into the sleeve wall to realize anchoring; the partition ring 8, the upper metal sealing ring 5, the lower metal sealing ring 7, the soluble rubber sealing ring 6, the U-shaped metal sealing ring 3 and the elliptic soluble rubber ring 4 are in contact with the casing wall, and the three sealing structures jointly realize sealing, so that the sealing performance of the soluble ball seat is greatly enhanced.
The present utility model is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any person skilled in the art can make some changes or modifications to the equivalent embodiments without departing from the scope of the technical solution of the present utility model, but any simple modification, equivalent changes and modifications to the above-mentioned embodiments according to the technical substance of the present utility model are still within the scope of the technical solution of the present utility model.
Claims (3)
1. The utility model provides a soluble ball seat sealing device structure suitable for unconventional oil gas exploitation, includes from left to right soluble ball (1), slide body (2), U type metal seal ring (3), oval soluble rubber circle (4), goes up metal seal ring (5), soluble rubber seal ring (6), lower metal seal ring (7), spacer ring (8), slips base member (9), embedded slips piece (10), lock sleeve (11), anticollision ring (12), release pull rod (14) and shear pin (13) that connect gradually, its characterized in that: in the setting process of the soluble ball seat, the slip matrix (9) acts on the spacer ring (8), the spacer ring (8) is stressed to expand the diameter until the outer surface of the spacer ring (8) contacts with the inner wall of the sleeve, and the ball seat is formed for sealing in the first step; the slip acting force is transmitted to the metal sealing ring through the left end face of the spacing ring (8), the lower metal sealing ring (7) and the upper metal sealing ring (5) are subjected to stress diameter expansion until the outer surface of the metal sealing ring contacts with the inner wall of the sleeve, and the metal sealing ring is combined with the soluble rubber sealing ring (6) to form second-step sealing of the ball seat; the diameter of the metal sealing ring is expanded to the maximum diameter of the sliding body (2), the left end face of the metal sealing ring extrudes the right end face of the U-shaped metal sealing ring (3), the U-shaped metal sealing ring (3) and the elliptic soluble rubber ring (4) are extruded and deformed, the U-shaped metal sealing ring (3) and the elliptic soluble rubber ring (4) form the third-step sealing of the ball seat, and the sealing performance of the soluble ball seat is greatly enhanced by the three-step sealing combination.
2. The soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation according to claim 1 is characterized in that a spacer ring (8) is added between the metal sealing ring and the slip base body (9), the spacer ring (8) enables acting force generated by expanding the slip base body (9) to uniformly act on the upper metal sealing ring (5) and the lower metal sealing ring (7), and contact stress between the upper metal sealing ring and the lower metal sealing ring is reduced, so that the safety of the metal sealing ring structure is protected.
3. The soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation, according to claim 1, is characterized in that the left end face of the U-shaped metal sealing ring (3) is contacted with the right end face of the bulge of the outer diameter of the sliding body (2), and the bulge limits the axial displacement of the U-shaped metal sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321371037.6U CN219888018U (en) | 2023-06-01 | 2023-06-01 | Soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321371037.6U CN219888018U (en) | 2023-06-01 | 2023-06-01 | Soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219888018U true CN219888018U (en) | 2023-10-24 |
Family
ID=88403555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321371037.6U Active CN219888018U (en) | 2023-06-01 | 2023-06-01 | Soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219888018U (en) |
-
2023
- 2023-06-01 CN CN202321371037.6U patent/CN219888018U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112228005B (en) | Low setting force bridge plug capable of fishing for well lifting and pressure relief | |
| CN111734340B (en) | Integrated packer for oil field exploitation | |
| CN102996089A (en) | Multi-stage hydraulic expansion tail pipe suspension system with reducing expansion cone for horizontal well for thermal recovery of heavy oil | |
| CN110617026B (en) | Downhole operation device and method | |
| CN219888018U (en) | Soluble ball seat sealing device structure suitable for unconventional oil and gas exploitation | |
| CN112127827A (en) | Large-drift-diameter packer | |
| CN201851069U (en) | Multi-purpose anchor packer | |
| CN114809981B (en) | Novel soluble ball seat structure suitable for unconventional oil and gas exploitation | |
| CN210033362U (en) | High pressure difference step-by-step deblocking packer | |
| CN2698958Y (en) | Hydraulic expansion reinforcing device for down-hole casing patch | |
| CN201810262U (en) | Open hole packer with single rubber tube | |
| CN114961674B (en) | Horizontal section double-pipe subsection shunt synchronous injection and production technology | |
| CN211924128U (en) | Double-piston large-drift-diameter hydraulic recoverable packer | |
| CN114941514B (en) | Split type soluble ball seat structure suitable for volume fracturing | |
| CN116498254A (en) | Soluble ball seat of C-shaped slip structure suitable for staged fracturing | |
| CN211777325U (en) | Recyclable packer with built-in safety valve | |
| CN209908454U (en) | Isolation packer device of novel sealing structure for thickened oil thermal production well | |
| CN110965951B (en) | Large-drift-diameter hydraulic anchor and use method thereof | |
| CN210714586U (en) | Self-checking mechanical water plugging pipe column | |
| CN202170760U (en) | Downhole hydraulic safety connector | |
| CN209942783U (en) | High-temperature high-pressure oil and gas well open hole section packing well completion device | |
| CN201874516U (en) | Sectional well completion packer for thermal production of heavy oil wells | |
| CN112228001A (en) | Packer with low setting force and low unsetting force | |
| CN213235010U (en) | Improved open hole packer | |
| CN211924131U (en) | Packer of integral mandrel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |