CN112377122A - Full soluble slip - Google Patents

Abstract

Translated fromChinese

本发明公开了一种全可溶卡瓦，属于井下工具技术领域，适用于封隔器、桥塞等需要可解封锚定结构要求的工具设计。全可溶卡瓦的制备方法是在特殊设计加工的水溶性镁铝合金本体上使用特定的工艺方法覆上一层0.5‑1mm厚耐磨性强、摩擦系数高的镍基合金薄层。全可溶卡瓦的应用方法是配合卡瓦锥体、卡瓦背圈使用，在工具坐封过程中使全可溶卡瓦均匀张开并贴合套管，使工具能够锚定在套管上不发生移动，并在全可溶卡瓦溶解后工具能够自动解封。相较于传统卡瓦，全可溶卡瓦不伤害套管，溶解后不在套管内遗留杂质，不影响后续施工，简化了施工流程。

The invention discloses a fully soluble slip, which belongs to the technical field of downhole tools, and is suitable for the design of tools such as packers and bridge plugs that require a de-sealing and anchoring structure. The preparation method of the fully soluble slip is to coat a 0.5-1mm thick nickel-based alloy thin layer with strong wear resistance and high friction coefficient on a specially designed and processed water-soluble magnesium-aluminum alloy body using a specific process. The application method of the fully soluble slips is to use with the slip cone and the slip back ring. During the tool setting process, the fully soluble slips are evenly opened and fit the casing, so that the tool can be anchored on the casing. There is no movement on the surface, and the tool can be automatically unsealed after the fully soluble kava has dissolved. Compared with traditional slips, fully soluble slips do not damage the casing, and no impurities are left in the casing after dissolving, which does not affect subsequent construction and simplifies the construction process.

Description

Full soluble slip

Technical Field

The invention relates to the technical field of downhole tools, in particular to a fully soluble slip.

Background

A wide variety of downhole tools are required for use in hydrocarbon development, some of which require releasable anchoring structures, typical examples of which include: packer tools required in special operations such as testing, well workover, layered injection and production and the like; the bridge plug tool is used for temporarily plugging a shaft in the fracturing modification operation of an oil and gas well. Slips in traditional anchoring structure adopt technology preparation such as hardened surface tooth or inlay carbide tooth, inlay ceramic tooth, and the slips tooth can imbed the casing wall and cause the instrument can not remove, recycles special design's structure when needing the deblocking and withdraws the slips tooth. The traditional slip not only can damage the wall of a casing pipe and cause deformation and damage of the casing pipe, but also can leave fragments of slip teeth in a well to cause accidents, increase the difficulty of subsequent construction in the well, become potential safety hazards, and even the casing pipe needs to be drilled and ground to clean the casing pipe.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the fully-soluble slip, slip teeth are not needed, fragments cannot be left in a well, and the anchoring is firm and reliable.

The technical scheme adopted by the invention for solving the technical problems is as follows: providing an all soluble slip comprising: the water-soluble magnesium-aluminum alloy comprises a water-soluble magnesium-aluminum alloy body and a nickel-based alloy thin layer; the nickel-based alloy thin layer is attached to the surface of the water-soluble magnesium-aluminum alloy body;

the water-soluble magnesium-aluminum alloy comprises a water-soluble magnesium-aluminum alloy body and a water-soluble magnesium-aluminum alloy body, wherein an inner conical surface is designed in the water-soluble magnesium-aluminum alloy body, and the taper of the inner conical surface is 5-10 degrees; designing stress grooves, wherein the stress grooves are formed by cutting slits on the water-soluble magnesium-aluminum alloy body, the width of each slit is 1-2 mm, the length of each slit is 1-3 mm less than the radius of the water-soluble magnesium-aluminum alloy body, and the number of the slits is 6-12; designing a concave-convex surface, wherein the concave-convex surface is represented by a circular arc surface, a triangular surface or other shaped surfaces; the design has fixed boss, the angle of fixed boss bottom plane and perpendicular is 0 ~ 30, the number of fixed boss with the stress groove number is the same.

Wherein the water-soluble magnesium-aluminum alloy body is made of water-soluble magnesium-aluminum alloy; the composition comprises the following components in percentage by weight: one material formula comprises 25-80% of magnesium, 19-74% of aluminum and less than or equal to 1% of other contents; the other material formula is 42-68% of magnesium, 31-57% of aluminum and the content of the other materials is less than or equal to 1%.

Wherein the nickel-based alloy thin layer is made of nickel-based alloy powder, the diameter of the powder particles is 0.05-0.3mm, and the nickel-based alloy thin layer is composed of the following components in percentage by weight: one material formula is that, nickel-chromium alloy powder is 60-99%, water-soluble magnesium aluminum alloy powder is 1-39%, and the other content is less than or equal to 1%; the other material formula is 60-95% of nickel-chromium-boron alloy powder, 1-39% of water-soluble magnesium aluminum alloy powder and the balance content is less than or equal to 1%.

The method for attaching the nickel-based alloy thin layer to the water-soluble magnesium-aluminum alloy body comprises the following steps:

the nickel-based alloy powder is formed into a molten or softened state by utilizing the high temperature of gas combustion flame;

and spraying the melted or softened nickel-based alloy powder onto the concave-convex surface of the water-soluble magnesium-aluminum alloy body by using compressed air flow to form a coating with the thickness of 0.5-1 mm.

Wherein the combustion gas is acetylene, propane or methylacetylene-propadiene, and the combustion temperature is controlled to be 200-250 ℃.

Compared with the prior art, the invention has the following beneficial effects:

1. compared with the traditional slip preparation method, the preparation method of the fully soluble slip provided by the invention does not need to harden surface teeth or inlay hard alloy teeth or inlay ceramic teeth, the slip anchoring can not cause deformation damage to a sleeve, and metal fragments can not be left in a well, so that the occurrence of underground accidents is avoided.

2. Compared with the traditional slip preparation method, the preparation method of the fully soluble slip provided by the invention does not need an additional slip recovery mechanism, the fully soluble slip can be completely dissolved in water and then automatically deblocked, mechanical failure can not happen, the slip cannot be deblocked, and a lower pipe column is not needed to be drilled and ground to clean a sleeve.

3. The application method of the fully soluble slip provided by the invention can uniformly split the fully soluble slip, so that the tool is stably anchored on the casing, and the fully soluble slip application method is simple in structure, easy to operate, safe and reliable, and has higher popularization value.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic diagram of a fully soluble slip according to the present invention;

FIG. 2 is a schematic cross-sectional view of an all soluble slip segment according to the present invention;

FIG. 3 is a schematic view of a convex concave surface of an all soluble slip according to the present invention;

FIG. 4 is a schematic view of a triangular concave-convex surface of an all soluble slip according to the present invention;

FIG. 5 is a schematic view of the application assembly of an all soluble slip according to the present invention;

FIG. 6 is a schematic view of a slip cone in an application assembly of an all soluble slip as provided by the present invention;

FIG. 7 is a schematic view of a slip back ring in an application assembly of an all soluble slip according to the present invention;

FIG. 8 is a schematic view of a fully soluble slip of the present invention prior to expansion within a casing;

FIG. 9 is a schematic view of a fully soluble slip of the present invention after the slip has been expanded within a casing;

FIG. 10 is a schematic view of the external structure of an all-soluble slip according to the present invention.

In the figure: 1-full soluble slips, 2-slips cone, 3-slips back ring, 4-casing, 101-water-soluble magnesium aluminum alloy body, 102-nickel-based alloy thin layer, 10101-inner conical surface, 10102-stress groove, 10103-concave-convex surface, 10104-fixed boss, 201-outer conical surface, 301-fixed groove

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Referring to fig. 1 and 10, the present invention provides an all soluble slip comprising: a water-soluble magnesium-aluminum alloy body 101 and a nickel-based alloythin layer 102.

The water-soluble magnesium-aluminum alloy body 101 is made of water-soluble magnesium-aluminum alloy and comprises the following components in percentage by weight: one preferable material formula is that the magnesium accounts for 25-80%, the aluminum accounts for 19-74%, and the content of the other materials is less than or equal to 1%; another preferable material formula is that the magnesium accounts for 42-68%, the aluminum accounts for 31-57%, and the other contents are less than or equal to 1%. The technical personnel adjust the formula of the water-soluble magnesium-aluminum alloy according to the formula proportion table according to the application environment and the complete dissolution time requirement.

The structural features of the water-soluble magnesiumaluminum alloy body 101 include at least the following 4:

the design has interiorconical surface 10101, and the tapering of interiorconical surface 10101 generally is 5 ~ 10, and this angle is the friction angle of water-solublemagnalium alloy body 101 andslips cone 102, and accessible static friction test adjustment after survey.

The design hasstress groove 10102, andstress groove 10102 carries out the slot on water-soluble magnalium body 101, and the slot width is 1 ~ 2mm generally, and the slot length generally subtracts 1 ~ 3mm for water-soluble magnalium body 101 radius, and the slot number is along circumference evenly distributed 6 ~ 12, and behind theprocessing stress groove 10102, water-soluble magnalium body 101 is evenly divided into 6 ~ 12, still has the material to connect between each and does not cut off, and one of them lamella is shown in figure 2.

The concave-convex surface 10103 is designed, the concave-convex surface 10103 can be represented as a circular arc surface as shown in fig. 4, or can be represented as a triangular surface as shown in fig. 5, or can be represented as a surface with other shapes, and any method capable of increasing the surface area of the outer circle of the water-soluble magnesiumaluminum alloy body 101 can be adopted.

The design has fixedboss 10104, and the angle offixed boss 10104 bottom plane and perpendicular is generally 0 ~ 30, and the number of fixedboss 10104 is generally the same withstress slot 10102 number.

The material of the thin nickel-basedalloy layer 102 is nickel-based alloy powder, the diameter of the powder particles is generally 0.05-0.3mm, and the nickel-based alloy powder consists of the following components in percentage by weight: one preferable material formula is that the nickel-chromium alloy powder accounts for 60-99%, the water-soluble magnesium-aluminum alloy powder accounts for 1-39%, and the other content is less than or equal to 1%; another preferable material formula is that the nickel-chromium-boron alloy powder accounts for 60-95%, the water-soluble magnesium-aluminum alloy powder accounts for 1-39%, and the other content is less than or equal to 1%. Technicians adjust the formula of the nickel-based alloy powder according to the formula proportion table according to the bearing tonnage and the application environment requirements.

The method for adhering the nickel-based alloythin layer 102 to the water-soluble magnesium-aluminum alloy body 101 comprises the following steps: the nickel-based alloy powder is melted or softened by using the high temperature of gas combustion flame, and the melted or softened nickel-based alloy powder is sprayed on the concave-convex surface 10103 of the water-soluble magnesium-aluminum alloy body 101 by using compressed air flow to form a coating with the thickness of 0.5-1mm generally. The combustion gas is acetylene, propane or methylacetylene-propadiene, and the combustion temperature is controlled to 200-250 ℃.

As shown in figure 5, the application method of the fullysoluble slip 1 is matched with aslip cone 2 and aslip back ring 3.

As shown in fig. 6, theslip cone 2 is designed with an outerconical surface 201, the outerconical surface 201 is matched with the innerconical surface 10101, and the taper of the outerconical surface 201 is the same as that of the innerconical surface 10101.

As shown in fig. 7, theslip back ring 3 is designed withfixing grooves 301, thefixing grooves 301 are matched with thefixing bosses 10104, the angle between the bottom plane of thefixing grooves 301 and the vertical plane is the same as the angle between the bottom plane of thefixing bosses 10104 and the vertical plane, and the number of thefixing grooves 301 is the same as the number of thefixing bosses 10104.

The working principle of the fully soluble slips is as follows:

as shown in fig. 8, theslip cone 2, the fullysoluble slips 1, and theslip back ring 3 are assembled and then lowered into thecasing 4.

As shown in fig. 9, theslip cone 2 is pressed downwards and/or theslip back ring 3 is pushed upwards by a special tool, the downward pressing force and/or the upward pushing force is generally 1-3 t, the fullysoluble slip 1 expands along the outer conical surface of theslip cone 2, the fullysoluble slip 1 is uniformly split along thestress groove 10102 under the influence of an expansion force and then is attached to and anchored on the inner wall of thecasing 4, and the fullysoluble slip 1 and theslip cone 2 cannot move due to friction force. When the liquid in the casing and the fullysoluble slips 1 are subjected to chemical reaction, the fullysoluble slips 1 are dissolved to realize automatic unsealing, and the unsealing process generally needs 96-240 hours.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (5)

Translated fromChinese

1.一种全可溶卡瓦，其特征在于，所述全可溶卡瓦(1)包括：水溶性镁铝合金本体(101)和镍基合金薄层(102)；所述镍基合金薄层(102)附着于所述水溶性镁铝合金本体(101)表面；1. A fully soluble slip, characterized in that the fully soluble slip (1) comprises: a water-soluble magnesium-aluminum alloy body (101) and a nickel-based alloy thin layer (102); the nickel-based alloy A thin layer (102) is attached to the surface of the water-soluble magnesium-aluminum alloy body (101);其中，水溶性镁铝合金本体(101)设计有内圆锥面(10101)，所述内圆锥面(10101)的锥度为5～10°；设计有应力槽(10102)，所述应力槽(10102)是在所述水溶性镁铝合金本体(101)上进行割缝，割缝宽度为1～2mm，割缝长度为所述水溶性镁铝合金本体(101)半径减去1～3mm，割缝个数为沿圆周均匀分布6～12个；设计有凹凸表面(10103)，所述凹凸表面(10103)表现为圆弧形表面，三角形表面或其它形状表面；设计有固定凸台(10104)，所述固定凸台(10104)底端平面与垂直面的角度为0～30°，所述固定凸台(10104)的个数与所述应力槽(10102)个数相同。Wherein, the water-soluble magnesium-aluminum alloy body (101) is designed with an inner conical surface (10101), and the taper of the inner conical surface (10101) is 5-10°; a stress groove (10102) is designed, and the stress groove (10102) ) is to perform slitting on the water-soluble magnesium-aluminum alloy body (101), the slit width is 1-2 mm, and the slit length is the radius of the water-soluble magnesium-aluminum alloy body (101) minus 1-3 mm, and the cutting slit is The number of seams is 6 to 12 evenly distributed along the circumference; a concave-convex surface (10103) is designed, and the concave-convex surface (10103) is shown as a circular arc surface, a triangular surface or a surface of other shapes; a fixed boss (10104) is designed The angle between the bottom plane of the fixed boss (10104) and the vertical plane is 0-30°, and the number of the fixed bosses (10104) is the same as the number of the stress grooves (10102).2.根据权利要求1所述的全可溶卡瓦，其特征在于，所述水溶性镁铝合金本体(101)的材料是水溶性镁铝合金；由下述重量百分比的成分组成：一种材料配方是，镁25～80％，铝19～74％，其它含量≤1％；另一种材料配方是，镁42～68％，铝31～57％，其它含量≤1％。2. fully soluble slips according to claim 1, is characterized in that, the material of described water-soluble magnesium-aluminum alloy body (101) is water-soluble magnesium-aluminum alloy; It is made up of the following components by weight: a The material formula is magnesium 25-80%, aluminum 19-74%, and other contents ≤1%; another material formula is magnesium 42-68%, aluminum 31-57%, and other contents ≤1%.3.根据权利要求1所述的全可溶卡瓦，其特征在于，所述镍基合金薄层(102)的材料是镍基合金粉末，粉末颗粒直径是0.05-0.3mm，由下述重量百分比的成分组成：一种材料配方是，镍-铬系合金粉末60～99％，水溶性镁铝合金粉末1～39％，其它含量≤1％；另一种材料配方是，镍-铬-硼系合金粉末60～95％，水溶性镁铝合金粉末1～39％，其它含量≤1％。3. The fully soluble slip according to claim 1, characterized in that, the nickel-based alloy thin layer (102) is made of nickel-based alloy powder, and the powder particle diameter is 0.05-0.3 mm, which is determined by the following weight Percentage composition: one material formula is, nickel-chromium alloy powder 60-99%, water-soluble magnesium-aluminum alloy powder 1-39%, other content ≤ 1%; another material formula is nickel-chromium- The boron-based alloy powder is 60-95%, the water-soluble magnesium-aluminum alloy powder is 1-39%, and other contents are less than or equal to 1%.4.根据权利要求1所述的全可溶卡瓦，其特征在于，将所述镍基合金薄层(102)附着在水溶性镁铝合金本体(101)的方法是：4. The fully soluble slip according to claim 1, wherein the method for attaching the nickel-based alloy thin layer (102) to the water-soluble magnesium-aluminum alloy body (101) is:利用气体燃烧火焰的高温将镍基合金粉末形成熔融或软化状态；Using the high temperature of the gas combustion flame to form the nickel-based alloy powder into a molten or softened state;用压缩的空气流将熔融或软化的镍基合金粉末喷射到所述水溶性镁铝合金本体(101)的凹凸表面(10103)上，形成为0.5～1mm厚的涂层。The molten or softened nickel-based alloy powder is sprayed onto the concave-convex surface (10103) of the water-soluble magnesium-aluminum alloy body (101) with a compressed air stream to form a coating with a thickness of 0.5-1 mm.5.根据权利要求4所述的全可溶卡瓦，其特征在于，所述燃烧气体采用乙炔、丙烷或甲基乙炔-丙二烯，燃烧温度控制在200～250℃。5 . The fully soluble slip according to claim 4 , wherein the combustion gas adopts acetylene, propane or methylacetylene-propadiene, and the combustion temperature is controlled at 200-250° C. 6 .

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