CN110671074A - Well cementation rubber plug rubber part and reinforcing method thereof - Google Patents
Well cementation rubber plug rubber part and reinforcing method thereof Download PDFInfo
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- CN110671074A CN110671074A CN201810706874.7A CN201810706874A CN110671074A CN 110671074 A CN110671074 A CN 110671074A CN 201810706874 A CN201810706874 A CN 201810706874A CN 110671074 A CN110671074 A CN 110671074A
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- rubber
- wire mesh
- mesh framework
- metal rod
- plug
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 53
- 239000002184 metal Substances 0.000 claims abstract description 53
- 239000010985 leather Substances 0.000 claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims abstract description 6
- 238000009941 weaving Methods 0.000 claims abstract description 6
- 239000002356 single layer Substances 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 10
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000010146 3D printing Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 238000010068 moulding (rubber) Methods 0.000 claims description 2
- 229910052755 nonmetal Inorganic materials 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 235000013580 sausages Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
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- 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)
- Woven Fabrics (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a well cementation rubber plug rubber component and a reinforcing method thereof. The rubber component is characterized in that a wire mesh framework is implanted in a leather cup component of the rubber component, the wire mesh framework extends out of the rubber component at a position where the leather cup is in contact with a metal rod and is connected with the metal rod, the wire mesh framework is of a single-layer two-dimensional circular truncated cone structure or a multi-layer three-dimensional circular truncated cone structure in a grid weaving mode, and the length of the wire mesh framework extending out of the rubber component is not less than half of the height of the leather cup. On one hand, when the rubber part of the rubber plug is formed at high temperature, a wire mesh made of another material is embedded in the rubber part to serve as a framework, so that the tensile strength and the abrasion resistance of the rubber part are improved; on the other hand, the skeleton silk screen embedded in the rubber part is firmly connected with the metal rod piece of the rubber plug, so that the anti-falling strength of the rubber part and the metal rod piece is improved.
Description
Technical Field
The invention relates to the field of petroleum well cementation, in particular to a well cementation rubber plug rubber part and a reinforcing method thereof.
Background
The use of the rubber plug in the well cementation process is of great importance, and the integrity of the rubber plug in the well has great significance for the success of well cementation. The existing rubber plug mainly has two types of split type and integral type, wherein the split type mainly means that a rubber part and a metal rod part are respectively assembled together; the integral type mainly means that the rubber part and the metal rod piece are integrally formed through high-temperature integral vulcanization. From the field application condition, the problem that the rubber plug fails because the rubber cup part of the existing rubber plug is only made of pure rubber, and the rubber cup part is determined to have low strength and easy damage because the rubber cup part of the existing rubber plug is often poor in wear resistance and torn and falls off in the using process.
The Chinese patent CN204716195U (high strength cementing rubber plug) relates to high strength, and only adds rubber hanging canvas on and under the rubber body of the rubber plug, so that the breaking and perforating strength of the rubber plug is enhanced to a limited extent. Chinese patent CN101332681 (a preparation method of a heat-resistant and wear-resistant well cementation rubber plug) adopts a chemical mode, and optimizes the existing rubber formula to improve the heat resistance and wear resistance of the well cementation rubber plug.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a rubber part of a well cementation rubber plug and a reinforcing method thereof. The method is simple and easy to implement, has low cost, and can improve the tearing resistance, the falling resistance strength and the wear resistance degree of the rubber piece and reinforce the connection strength of the rubber piece and the metal rod piece compared with the existing well cementation rubber plug.
One of the purposes of the invention is to provide a rubber component of a well cementation rubber plug, wherein a wire mesh framework is implanted in a leather cup component of the rubber component, the wire mesh framework extends out of the rubber component at the position where the leather cup is contacted with a metal rod piece and is connected with the metal rod piece,
the wire mesh framework is a single-layer two-dimensional circular truncated cone structure or a multi-layer three-dimensional circular truncated cone structure in a grid weaving mode, the strength of the wire mesh framework is not lower than that of the rubber part, and the length of the wire mesh framework extending out of the rubber part is not smaller than half of the height of the leather cup.
The well cementation rubber plug rubber part can be a well cementation rubber plug rubber part with a split structure, and can also be a well cementation rubber plug rubber part with an integral structure.
In a preferred embodiment of the present invention,
the silk screen framework is implanted in the high-temperature molding process of the rubber part of the rubber plug, the silk screen framework material has certain strength and is resistant to high temperature and high pressure, and the material can have the strength and toughness which are not lower than those of a rubber material in contact with the material under the working conditions of bottom hole temperature and bottom hole pressure (the temperature is 100-200 ℃ and the pressure is 50-150 MPa) and can be well cemented with the rubber body. The material may be a metal, an alloy material or a non-metallic material (e.g., various types of engineering plastics), preferably selected from at least one of aluminum, aluminum alloy, steel or iron.
The mesh shape of silk screen skeleton can adopt different shapes, and the mesh size is guaranteed evenly, and holistic silk screen skeleton just can the atress even like this, and difficult fracture is preferably circular or polygon, and the polygon includes triangle-shaped, quadrangle, pentagon, hexagon etc. more prefers rectangle, rhombus, triangle-shaped, circular.
The shape and thickness of the single wire of the screen framework have no specific requirements, but the single wire can be firmly combined with the used rubber, has better strength and toughness while adapting to the underground working condition, and ensures that the screen framework material is completely buried in the rubber part and is not exposed. The cross section of the single wire of the silk screen is preferably round, rectangular and other shapes, or the single wire of the silk screen framework is in a solenoid shape.
Preferably, the silk screen framework can be divided into a main part and a branch structure, the main part is in the axial direction of the circular truncated cone, namely the axial direction of the metal rod body, the single section of the main part can be in a circular shape, an oval shape, a rectangular shape, a solenoid shape and the like, the thickness of the main part can be uniform and thin, the main part can also be gradually thinned from the contact end of the main part with the metal rod body to the other end, branches are arranged between adjacent main parts, the branches are in a two-dimensional or three-dimensional grid structure, the mesh shapes are in a circular shape, a triangular shape, a quadrilateral shape, a pentagonal shape, a hexagonal shape and the like, the single section of each branch can be in. The branch grid structure is connected with the trunk, and the whole body forms a net structure. The connection mode of the branch grid structure and the trunk is hinging, welding, 3D printing or integral reverse mould forming. The thickness of the trunk and the branches is ensured to ensure that the single-layer net structure or the three-dimensional net structure is embedded into the rubber component and not exposed.
The silk screen framework can be prepared by hand weaving, or by die forming (casting a model or corrosion forming), 3D printing, mechanical stamping and hollowing forming and the like.
The connection mode of the wire mesh framework and the metal rod piece has no special requirement, but has better connection strength while meeting the underground working condition, and the preferable connection mode can be welding, hinging, riveting or the like or the combination of the welding, the hinging, the riveting or the like.
The invention also aims to provide a method for reinforcing the rubber part of the well cementation rubber plug, which is characterized in that when the rubber plug rubber part is molded at high temperature, a wire mesh made of another material is embedded in the rubber part to serve as a framework so as to improve the tensile strength and the abrasion resistance of the rubber part body; on the other hand, the skeleton silk screen embedded in the rubber component is firmly connected with the metal rod piece of the rubber plug, so that the anti-falling strength of the rubber component and the metal rod piece is improved.
The method for reinforcing the rubber part of the well cementation rubber plug comprises the following two schemes:
the first scheme is as follows: if the well cementation rubber plug belongs to a split structure formed by assembling a rubber part and a metal rod piece
Before the rubber part of the well cementation rubber plug of a split structure is molded, a wire mesh framework is implanted into a rubber part mold to be molded in advance, the wire mesh framework at the contact position of a leather cup and a metal rod piece extends out of the rubber part, then molten rubber is injected, after the rubber is molded, on one hand, the rubber part and the metal rod piece are assembled, on the other hand, the extending part of the wire mesh framework is connected with the metal rod piece, and the well cementation rubber plug is obtained.
For the rubber cup part which is not contacted with the metal rod piece, the wire mesh framework is put in advance before the high-temperature molding process of the rubber plug rubber part, and after the rubber is melted at high temperature and gradually solidified, the wire mesh framework is embedded into the rubber cup part to play a supporting role, so that the tensile and tear strength of the rubber cup part is enhanced, and meanwhile, the elastic toughness of the rubber cup is achieved.
To the rubber body position that contacts with the metal rod piece, the silk screen skeleton is at the in-process that rubber high temperature melting was buried, extends out certain length from the leather cup inside according to inside original network deployment form of rubber leather cup, and is firmly continuous with the metal rod piece. Rubber leather cup part assembles on the metal member according to normal plug mounting means on the one hand like this, and on the other hand still relies on the silk screen skeleton to connect in metal member, and dual guarantee has strengthened the anti-shedding performance of rubber leather cup greatly.
Scheme II: if the well cementation rubber plug belongs to a high-temperature integral forming structure of rubber and metal rod pieces
Before the rubber part of the overall structure of the well cementation rubber plug is molded, the wire mesh framework is connected with the metal rod piece, then the wire mesh framework and the metal rod piece are placed in a rubber part mold, the wire mesh framework extends out of the rubber part, molten rubber is injected, and the well cementation rubber plug is obtained after rubber molding.
The silk screen framework is put in advance and is firmly connected with the metal rod piece in advance. When the rubber plug rubber part is subjected to high-temperature molding, after the rubber is melted at high temperature and gradually solidifies, the wire mesh framework is embedded into the rubber plug rubber part to play a supporting role, so that the tensile and tear-resistant strength of the leather cup part is enhanced, and meanwhile, the rubber plug rubber part has the elastic toughness of the rubber leather cup. The rubber leather cup is glued with the metal rod piece by the rubber body of the rubber leather cup, and the metal rod piece is connected with the rubber leather cup by the wire mesh framework, so that the falling resistance of the rubber leather cup is greatly enhanced.
The well cementation rubber plug manufactured by the method can effectively ensure the integrity of the rubber plug in the well cementation displacement process, improve the effectiveness of the rubber plug, increase the success rate of well cementation bumping and pressing, and effectively reduce well cementation accidents such as replacing empty wells, filling sausages and the like caused by the rubber plug.
The invention has the following characteristics:
(1) the invention has simple and clear thought, simple process, low cost and convenient implementation.
(2) The material of the framework silk screen related by the invention is not specially limited, and the shape and the thickness of a single silk are not specially required, but the framework silk screen can be firmly combined with the used rubber, and has better strength and toughness while being suitable for the underground working condition.
(3) The knitting mode, the grid shape and the size of the framework silk screen do not have special requirements, but can be firmly combined with the used rubber, and simultaneously, the firm and difficult deformation of the silk screen framework is considered, and the integrity of the rubber plug can be protected to the maximum extent when the framework silk screen is subjected to various pulling forces, pressures and frictional forces.
(4) The connection mode of the framework wire mesh and the rubber plug metal rod piece has no special requirement, but has better connection strength while being capable of adapting to underground working conditions.
Compared with the prior art, the invention has the beneficial effects that:
(1) the tearing resistance, the falling resistance and the wear resistance of the well cementation rubber plug are effectively enhanced.
(2) Effectively enhances the connection strength of the rubber piece and the metal rod piece of the well cementation rubber plug.
Drawings
Fig. 1 is a schematic diagram of a mesh of a wire mesh skeleton.
The rectangular grid is only a grid weaving form, and other weaving forms can be provided, such as a circular grid, a parallelogram grid, a triangular grid, a pentagonal grid, a hexagonal grid and the like.
Detailed Description
Example 1
Before the well cementation rubber plug rubber part high temperature molding of a split structure, the aluminum wire mesh framework with the rectangular mesh is placed into a rubber part model, the wire mesh framework at the position where the leather cup is in contact with the metal rod piece extends out of the rubber part, the extending length is two thirds of the height of the circular table of the leather cup, high-temperature molten rubber is injected, after the rubber is cooled and molded, on one hand, the rubber part is assembled with the metal rod piece, on the other hand, the extending part of the wire mesh framework is firmly connected with the metal rod piece through welding, a well cementation rubber plug is obtained, and the purpose of reinforcing the rubber.
The aluminum wire mesh framework is of a single-layer two-dimensional circular truncated cone structure, the cross section of a single wire of the wire mesh framework is rectangular, and the whole two-dimensional circular truncated cone wire mesh structure is formed by mechanical punching and hollowing.
The well cementation rubber plug component with the structure is applied to the drill rod rubber plug, can effectively strengthen the tearing resistance, the falling resistance strength and the wear resistance degree of the drill rod rubber plug, and effectively strengthens the connection strength of the rubber piece and the metal rod piece of the well cementation rubber plug.
Example 2
Before overall structure's well cementation plug rubber part high temperature molding, firmly assemble aluminium system silk screen skeleton and metal member, the part that extends out in following rubber with the silk screen skeleton firmly links to each other through the welding with the metal member, then put into rubber part mould with the silk screen skeleton together with the metal member, the length that makes the silk screen skeleton extend out in following rubber is two-thirds of the round platform height of leather cup, pour into molten rubber into, the back is solidified gradually to rubber, the silk screen skeleton just buries wherein, play joint support's effect, reach the purpose of reinforcing the rubber body.
Wherein, aluminium system silk screen skeleton is individual layer two-dimentional round platform structure, and single of silk screen skeleton is divided into trunk and branch structure, and the trunk is the axial direction along the round platform, and single cross-section of trunk is circular to the trunk thickness is even, is the branch between the adjacent trunk, and the branch is two-dimentional grid structure, and the mesh shape is circular, and branch single cross-section is circular, and the thickness of branch is unanimous, and whole individual layer two-dimentional round platform silk screen structure is obtained through the preparation of manual knitting, and the branch is firmly connected with the trunk through welding mode.
The obtained rubber component is applied to the tail pipe rubber plug, so that the tear resistance, the falling resistance strength and the wear resistance of the tail pipe rubber plug can be effectively enhanced.
Example 3
Before well cementation plug rubber part high temperature molding, firmly assemble the steel silk screen skeleton and the metal member of rectangle mesh, the part that extends out in following rubber with the silk screen skeleton firmly links to each other through the welding with the metal member, then put into rubber part mould with the silk screen skeleton together with the metal member, the length that makes the silk screen skeleton extend out in following rubber is two-thirds of the round platform height of leather cup, pour into molten rubber into, the back is solidified gradually to rubber, the silk screen skeleton just buries wherein, play joint support's effect, reach the purpose of consolidating the rubber body.
The steel silk screen framework is of a multi-layer three-dimensional circular truncated cone structure, the cross section of a single wire of the silk screen framework is rectangular, and the whole steel silk screen framework is obtained in a 3D printing mode.
The obtained rubber part is applied to the conventional well cementation bumping rubber plug, so that the tearing resistance, the falling resistance and the wear resistance of the conventional well cementation bumping rubber plug can be effectively enhanced, and the connection strength of the rubber part and the metal rod piece of the well cementation rubber plug is effectively enhanced.
Claims (10)
1. A well cementation plug rubber part which is characterized in that: a wire mesh framework is implanted in the leather cup part of the rubber part, the wire mesh framework extends out of the rubber part at the position where the leather cup is contacted with the metal rod piece and is connected with the metal rod piece,
the wire mesh framework is a single-layer two-dimensional circular truncated cone structure or a multi-layer three-dimensional circular truncated cone structure in a grid weaving mode, the strength of the wire mesh framework is not lower than that of the rubber part, and the length of the wire mesh framework extending out of the rubber part is not smaller than half of the height of the leather cup.
2. The cementing plug rubber component of claim 1, wherein:
the wire mesh framework material is selected from metal, alloy material or non-metal material.
3. The cementing plug rubber component of claim 2, wherein:
the wire mesh framework material is selected from aluminum, aluminum alloy, steel or iron.
4. The cementing plug rubber component of claim 1, wherein:
the mesh shape of the silk screen framework is circular or polygonal.
5. The cementing plug rubber component of claim 1, wherein:
the cross section of the single wire of the wire mesh framework is circular or rectangular, or the single wire of the wire mesh framework is in a solenoid shape.
6. The cementing plug rubber component of claim 1, wherein:
the silk screen framework comprises a trunk and a branch structure, the trunk is in the axial direction along the circular truncated cone, branches are arranged between adjacent trunks and are of two-dimensional or three-dimensional grid structures, the branch grid structures are connected with the trunk to integrally form the grid structures, and the connection mode of the branch grid structures and the trunk is hinging, welding, 3D printing or integral reverse mould forming.
7. The cementing plug rubber component of claim 6, wherein:
the thickness of a single main wire of the wire mesh framework is uniform, or the single main wire is gradually thinned from the contact end with the metal rod piece to the other end; the thickness of the branch single wire of the wire mesh framework is uniform.
8. The cementing plug rubber component of claim 1, wherein:
the connection mode of the wire mesh framework and the metal rod is welding, hinging or riveting or the combination of the welding, the hinging or the riveting.
9. The method for reinforcing the rubber component of the well cementation rubber plug as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
before the rubber part of the well cementation rubber plug of a split structure is molded, a wire mesh framework is implanted into a rubber part mold to be molded in advance, the wire mesh framework at the contact position of a leather cup and a metal rod piece extends out of the rubber part, then molten rubber is injected, after the rubber is molded, on one hand, the rubber part and the metal rod piece are assembled, on the other hand, the extending part of the wire mesh framework is connected with the metal rod piece, and the well cementation rubber plug is obtained.
10. The method for reinforcing the rubber component of the well cementation rubber plug as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
before the rubber part of the overall structure of the well cementation rubber plug is molded, the wire mesh framework is connected with the metal rod piece, then the wire mesh framework and the metal rod piece are placed in a rubber part mold, the wire mesh framework extends out of the rubber part, molten rubber is injected, and the well cementation rubber plug is obtained after rubber molding.
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| CN201810706874.7A CN110671074B (en) | 2018-07-02 | 2018-07-02 | Well cementation rubber plug rubber part and reinforcing method thereof |
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| CN201810706874.7A CN110671074B (en) | 2018-07-02 | 2018-07-02 | Well cementation rubber plug rubber part and reinforcing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112832931A (en) * | 2020-12-22 | 2021-05-25 | 湖北航天飞行器研究所 | Solid rocket engine nozzle blocking cover and forming method |
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