CN116624125A - Metal soluble bridge plug - Google Patents
Metal soluble bridge plug Download PDFInfo
- Publication number
- CN116624125A CN116624125A CN202310372357.1A CN202310372357A CN116624125A CN 116624125 A CN116624125 A CN 116624125A CN 202310372357 A CN202310372357 A CN 202310372357A CN 116624125 A CN116624125 A CN 116624125A
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- bridge plug
- wall
- slip
- metal
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 35
- 239000002184 metal Substances 0.000 title claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 84
- 239000003129 oil well Substances 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims description 9
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
Landscapes
- 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)
- Gasket Seals (AREA)
Abstract
The invention discloses a metal soluble bridge plug, which relates to the technical field of bridge plugs and comprises a soluble bridge plug main body, wherein the soluble bridge plug main body is made of soluble metal; the soluble bridge plug main body comprises a central tube, a joint, a movable cone, slips and a sealing ring, wherein the joint is arranged at the first end of the central tube; the movable cone is sleeved at the second end of the central tube and can move axially along the central tube, and an outer conical surface is arranged at the outer side of one end of the movable cone, which is connected with the central tube; the slip is sleeved on the central pipe, an inner conical surface which can be matched with the outer conical surface is arranged on the inner side of one end, close to the movable cone, of the slip, and when the movable cone moves towards the joint, the slip can expand and clamp the inner wall of the oil well casing; the sealing ring is positioned between the slips and the movable cone, the sealing ring is arranged on the outer wall of the sealing ring, the inner cone surface which can be matched with the outer cone surface is arranged on the inner wall of the sealing ring, and the sealing ring is made of soluble metal. The invention eliminates the use of the rubber sealing ring and avoids the blocking of the rubber sealing ring to a shaft.
Description
Technical Field
The invention relates to the technical field of bridge plugs, in particular to a metal soluble bridge plug.
Background
In the technical field of petroleum industry, processes such as packer and interval are realized by using a packer or a bridge plug, and the function of the bridge plug is to realize an oil gas well seal layer, and the bridge plug has the characteristics of few construction processes, accurate clamping and sealing positions, large fracturing scale and the like. According to different deblocking modes, bridge plugs can be divided into a removable bridge plug, a drillable bridge plug and a soluble bridge plug, wherein the removable bridge plug has high salvaging cost and high failure risk; when the amount of scraps generated during drilling and milling of the drillable bridge plug is large, the drillable bridge plug is easy to accumulate and block the sleeve, and the subsequent operation is adversely affected; the soluble bridge plug can be automatically dissolved in a certain liquid environment after the fracturing operation is completed, and after the soluble bridge plug is completely dissolved, the full-shaft drift diameter can be achieved, so that the subsequent production and well repair operation are facilitated, and the fracturing yield increase by utilizing the soluble bridge plug is a new generation process method which is gradually adopted.
The existing soluble bridge plug is generally characterized in that a sealing ring is embedded on the outer wall of a sealing ring to seal an oil well casing, but the existing sealing ring is generally a rubber sealing ring; in the dissolving process of the soluble bridge plug, the rubber sealing ring is dissolved later than the metal body of the soluble bridge plug, and after the dissolution of the metal body of the soluble bridge plug is completed, the rubber sealing ring which is not dissolved is easy to accumulate together to block a shaft when the flowback is opened due to the fact that the fixing of the metal body is lost.
Disclosure of Invention
The invention aims to provide a metal soluble bridge plug which solves the problems in the prior art and can avoid the blockage of a rubber sealing ring to a shaft.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a metal soluble bridge plug, which comprises a soluble bridge plug main body, wherein the soluble bridge plug main body is made of soluble metal; the dissolvable bridge plug body comprises:
a central tube;
the joint is arranged at the first end of the central tube;
the movable cone is sleeved at the second end of the central tube and can move along the axial direction of the central tube, and an outer conical surface is arranged outside one end, connected with the central tube, of the movable cone;
the slip is sleeved on the central pipe, an inner conical surface which can be matched with the outer conical surface is arranged on the inner side of one end, close to the movable cone, of the slip, and when the movable cone moves towards the joint, the outer conical surface of the movable cone can move along the inner conical surface of the slip so as to enable the slip to expand and clamp the inner wall of the oil well casing;
the sealing ring is positioned between the slips and the movable cone, a sealing ring is arranged on the outer wall of the sealing ring, an inner cone surface which can be matched with the outer cone surface is arranged on the inner wall of the sealing ring, and when the movable cone moves towards the joint, the sealing ring can be expanded to realize sealing with the inner wall of the oil well casing; wherein the sealing ring is made of soluble metal.
Preferably, the soluble metal is a magnesium alloy.
Preferably, a plurality of slip teeth are provided on the outer wall of the slips, the slip teeth being capable of gripping against the inner wall of the well casing when the slips are expanded.
Preferably, the slips are cylindrical barrels, and a plurality of deformation joints are uniformly distributed on the cylindrical barrels along the circumferential direction; the deformation joints are parallel to the axis of the cylindrical barrel, one end of each deformation joint axially penetrates through the cylindrical barrel, and adjacent deformation joints are reversely arranged.
Preferably, the deformation joint is a T-shaped deformation joint, and comprises a first deformation joint axially arranged along the cylindrical barrel and a second deformation joint circumferentially arranged along the cylindrical barrel, wherein one end of the first deformation joint axially penetrates through the cylindrical barrel, and the other end of the first deformation joint is communicated with the middle part of the second deformation joint.
Preferably, a stress hole is formed at both ends of the second deformation joint.
Preferably, a plurality of sealing rings are sequentially arranged on the outer wall of the sealing ring along the axial direction.
Preferably, an annular groove is formed in the outer wall of the sealing ring, the bottom of the sealing ring is embedded in the annular groove, and the top of the sealing ring is exposed out of the sealing ring and can be sealed with the oil well casing.
Preferably, flanges are arranged on two sides of the bottom of the sealing ring, and the flanges are clamped in the annular grooves.
Preferably, a plurality of slots are sequentially arranged on the flange along the circumferential direction.
Compared with the prior art, the invention has the following technical effects:
the sealing ring is arranged on the outer wall of the sealing ring, the inner wall of the sealing ring is provided with the inner conical surface which can be matched with the outer conical surface of the movable cone, and when the movable cone moves towards the joint, the sealing ring can be expanded to enable the sealing ring to be tightly attached to the inner wall of the oil well casing, so that sealing is realized; and the sealing ring is made of soluble metal, so that the use of the rubber sealing ring is eliminated, and the problem that the rubber sealing ring is accumulated together to block a shaft when the blowout flowback due to loss of support after the soluble bridge plug main body is dissolved is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a metal soluble bridge plug in an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating the distribution of deformation joints on slips according to an embodiment of the present invention;
FIG. 3 is a schematic view of the installation of a seal ring according to an embodiment of the present invention.
In the figure: the sealing ring comprises a 1-central pipe, a 2-joint, a 3-movable cone, 4-slips, a 401-deformation joint, 402-stress holes, 5-sealing rings, 501-annular grooves, 6-slip teeth, 7-sealing rings, 701-sealing ring bodies and 702-flanges.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a metal soluble bridge plug which solves the problems in the prior art and can avoid the blockage of a rubber sealing ring to a shaft.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1-3, the present embodiment provides a metal soluble bridge plug comprising a soluble bridge plug body made of a soluble metal; the soluble bridge plug body mainly comprises: a central tube 1, a joint 2, a movable cone 3, slips 4 and a sealing ring 5, wherein the joint 2 is arranged at a first end of the central tube 1; the movable cone 3 is sleeved at the second end of the central tube 1 and can axially move along the central tube 1, and an outer conical surface is arranged outside one end, connected with the central tube 1, of the movable cone 3; the slips 4 are sleeved on the central pipe 1, an inner conical surface which can be matched with the outer conical surface is arranged on the inner side of one end, close to the movable cone 3, of the slips 4, when the movable cone 3 moves towards the joint 2, the outer conical surface of the movable cone 3 can move along the inner conical surface of the slips 4, so that the slips 4 expand and clamp the inner wall of an oil well casing; the sealing ring 5 is positioned between the slips 4 and the movable cone 3, a sealing ring 7 is arranged on the outer wall of the sealing ring 5, an inner cone surface which can be matched with the outer cone surface is arranged on the inner wall, and when the movable cone 3 moves towards the joint 2, the sealing ring 5 can be expanded to realize sealing with the inner wall of the oil well casing; wherein the sealing ring 7 is made of soluble metal.
In this embodiment, a retaining structure is provided between the second end of the central tube 1 and the movable cone 3, and the retaining structure limits the movable cone 3 to move only along the central tube 1 toward the joint 2, but not away from the joint 2; the retaining structure may be selected from the prior art according to specific working requirements, for example, retaining teeth may be selected, and in this embodiment, no description will be given.
In the embodiment, the sealing ring 7 is also made of soluble metal, can be dissolved together with the soluble bridge plug main body, and eliminates the use of the rubber sealing ring, so that the problem that the rubber sealing ring is accumulated together to block a shaft when the blowout flowback due to loss of support after the soluble bridge plug main body is dissolved is avoided.
In this embodiment, the soluble metal is preferably a magnesium alloy, and more preferably a magnesium-aluminum alloy.
In this embodiment, a plurality of slip teeth 6 are provided on the outer wall of the slips 4, the slip teeth 6 being capable of gripping against the inner wall of the well casing when the slips 4 are expanded; wherein, can set gradually multiturn slips tooth 6 along the axial on the outer wall of slips 4, and every circle slips tooth 6 includes a plurality of slips tooth 6 that evenly set up along slips 4 outer wall circumference, through setting up foretell a plurality of slips tooth 6, can realize with the effective chucking of oil well casing inner wall.
In this embodiment, as shown in fig. 2, the slip 4 is a cylindrical barrel, and a plurality of deformation joints 401 are uniformly distributed on the cylindrical barrel along the circumferential direction; the deformation joints 401 are parallel to the axis of the cylindrical barrel, one end of each deformation joint 401 penetrates through the cylindrical barrel in the axial direction, the other end of each deformation joint 401 does not penetrate through the cylindrical barrel, and adjacent deformation joints 401 are reversely arranged, namely, the positions of two adjacent deformation joints 401 penetrating through the cylindrical barrel are at different ends of the cylindrical barrel. In this embodiment, by setting the plurality of deformation joints 401, the slip 4 can be conveniently expanded and deformed, and damage to the slip 4 during expansion and deformation can be avoided.
Further, in this embodiment, the deformation joint 401 is preferably a T-shaped deformation joint, and the T-shaped deformation joint includes a first deformation joint disposed along the axial direction of the cylindrical barrel and a second deformation joint disposed along the circumferential direction of the cylindrical barrel, where one end of the first deformation joint penetrates through the cylindrical barrel along the axial direction, and the other end is communicated with the middle of the second deformation joint. Alternatively, other deformation joints 401 meeting the working requirements can be selected according to the specific working requirements.
In this embodiment, two ends of the second deformation joint are provided with a stress hole 402, and the stress hole 402 is preferably a circular hole, and by setting the stress hole 402 to combine with the deformation joint 401, the stress in the deformation process can be released while the slip 4 is convenient to expand and deform, so that the slip 4 can be further prevented from being damaged.
In this embodiment, the outer wall of sealing ring 5 has set gradually the multichannel along the axial sealing ring 7, through setting up multichannel sealing ring 7, improves sealed effect to prevent that single-channel sealing ring 7 from damaging the back, whole seal structure inefficacy.
In this embodiment, as shown in fig. 3, an annular groove 501 is provided on the outer wall of the sealing ring 5, the bottom of the sealing ring 7 is embedded in the annular groove 501, and the top of the sealing ring 7 exposes the sealing ring 5 so as to be capable of sealing with the oil well casing; the sealing ring 7 comprises a sealing ring main body 701, flanges 702 are arranged on two sides of the bottom of the sealing ring main body 701, a sealing ring 7 with a T-shaped cross section is formed, the flanges 702 are clamped in the annular groove 501, effective fixation of the sealing ring 7 is achieved, and the sealing ring 7 is prevented from falling off in the expansion process.
In this embodiment, the flange 702 is sequentially provided with a plurality of slots along the circumferential direction, so that expansion and deformation of the sealing ring 7 can be facilitated by providing the slots; as a preferred embodiment, the slots on the side flanges 702 are staggered.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. A metal soluble bridge plug comprising a soluble bridge plug body made of a soluble metal; the method is characterized in that: the dissolvable bridge plug body comprises:
a central tube;
the joint is arranged at the first end of the central tube;
the movable cone is sleeved at the second end of the central tube and can move along the axial direction of the central tube, and an outer conical surface is arranged outside one end, connected with the central tube, of the movable cone;
the slip is sleeved on the central pipe, an inner conical surface which can be matched with the outer conical surface is arranged on the inner side of one end, close to the movable cone, of the slip, and when the movable cone moves towards the joint, the outer conical surface of the movable cone can move along the inner conical surface of the slip so as to enable the slip to expand and clamp the inner wall of the oil well casing;
the sealing ring is positioned between the slips and the movable cone, a sealing ring is arranged on the outer wall of the sealing ring, an inner cone surface which can be matched with the outer cone surface is arranged on the inner wall of the sealing ring, and when the movable cone moves towards the joint, the sealing ring can be expanded to realize sealing with the inner wall of the oil well casing; wherein the sealing ring is made of soluble metal.
2. The metal soluble bridge plug of claim 1, wherein: the soluble metal is magnesium alloy.
3. The metal soluble bridge plug of claim 1, wherein: a plurality of slip teeth are arranged on the outer wall of the slip, and when the slip expands, the slip teeth can be clamped on the inner wall of the oil well casing.
4. A metal soluble bridge plug according to claim 1 or 3, characterized in that: the slips are cylindrical barrels, and a plurality of deformation joints are uniformly distributed on the cylindrical barrels along the circumferential direction; the deformation joints are parallel to the axis of the cylindrical barrel, one end of each deformation joint axially penetrates through the cylindrical barrel, and adjacent deformation joints are reversely arranged.
5. The metal soluble bridge plug of claim 4, wherein: the deformation joint is a T-shaped deformation joint and comprises a first deformation joint axially arranged along the cylindrical barrel and a second deformation joint circumferentially arranged along the cylindrical barrel, one end of the first deformation joint axially penetrates through the cylindrical barrel, and the other end of the first deformation joint is communicated with the middle of the second deformation joint.
6. The metal soluble bridge plug of claim 5, wherein: and stress holes are formed in two ends of the second deformation joint.
7. The metal soluble bridge plug of claim 1, wherein: and a plurality of sealing rings are sequentially arranged on the outer wall of the sealing ring along the axial direction.
8. The metal soluble bridge plug of claim 1 or 7, wherein: the outer wall of the sealing ring is provided with an annular groove, the bottom of the sealing ring is embedded in the annular groove, and the top of the sealing ring is exposed out of the sealing ring and can be sealed with the inner wall of the oil well casing.
9. The metal soluble bridge plug of claim 8, wherein: flanges are arranged on two sides of the bottom of the sealing ring, and the flanges are clamped in the annular grooves.
10. The metal soluble bridge plug of claim 9, wherein: and a plurality of cutting grooves are sequentially formed in the flange along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310372357.1A CN116624125A (en) | 2023-04-10 | 2023-04-10 | Metal soluble bridge plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310372357.1A CN116624125A (en) | 2023-04-10 | 2023-04-10 | Metal soluble bridge plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116624125A true CN116624125A (en) | 2023-08-22 |
Family
ID=87635460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310372357.1A Pending CN116624125A (en) | 2023-04-10 | 2023-04-10 | Metal soluble bridge plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116624125A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116892378A (en) * | 2023-09-11 | 2023-10-17 | 大庆信辰油田技术服务有限公司 | Soluble bridge plug special for oil and gas well production increase |
-
2023
- 2023-04-10 CN CN202310372357.1A patent/CN116624125A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116892378A (en) * | 2023-09-11 | 2023-10-17 | 大庆信辰油田技术服务有限公司 | Soluble bridge plug special for oil and gas well production increase |
| CN116892378B (en) * | 2023-09-11 | 2023-12-19 | 大庆信辰油田技术服务有限公司 | Soluble bridge plug special for oil and gas well production increase |
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