Soluble signal ball for fracturing

Abstract

The utility model relates to the technical field of oil and gas exploitation equipment, and discloses a soluble signal ball for fracturing, which comprises a ball body, the ball body further comprises a coating layer, an inner film I, a sandwich layer, an inner film II and a core layer, the inner film II is coated on the periphery of the core layer, the sandwich layer is uniformly coated on the periphery of the inner film II, and the core layer is coated on the periphery of the sandwich layer. The periphery of the sandwich layer is coated with the first inner film, and the periphery of the first inner film is evenly wrapped with the wrapping layer. The ball body is of the multi-layer solid structure from outside to inside, the core layer is made of the porous ceramic material and is compounded with metal to form a dispersion structure, the strength and the conductivity of the porous material layer are improved, meanwhile, the dissolution speed of the porous material layer can be controlled, and the service life of the ball body is prolonged. The metal layer composed of the first inner film, the sandwich layer and the second inner film is sequentially arranged from outside to inside, and the fracturing ball meeting the expected dissolution rate can be made by means of layered arrangement of different metals and combination of strength plasticity and dissolution performance of the different metals.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil and gas exploitation equipment technical field, concretely is a fracturing soluble signal ball. BACKGROUND

[0002] The soluble fracturing ball is a tool used in the process of oil and gas exploitation, widely applied in the segmented fracturing operation of horizontal wells, and plays an important role especially in the exploitation of unconventional oil and gas resources such as tight gas and shale gas.

[0003] With the development of oil and gas exploitation to deep, high temperature, high pressure and other complex working conditions, higher requirements are put forward for the temperature and pressure resistance of the soluble fracturing ball. The current soluble fracturing ball may not meet the demand of stable work for a long time under some extreme conditions, such as ultra-high temperature and ultra-high pressure environment, and further research and development of materials with higher temperature and pressure resistance are needed. In addition, although the dissolution time of the soluble fracturing ball is controllable to a certain extent, in actual application, due to the complexity of downhole environment, such as changes of temperature, pressure and fluid composition, the dissolution speed may be unstable, which affects the fracturing effect and subsequent operation.

[0004] Therefore, how to develop a fracturing soluble signal ball with high stability is the research direction of this time. CONTENT OF THE UTILITY MODEL

[0005] To solve the above technical problems, the utility model provides a fracturing soluble signal ball.

[0006] The utility model adopts the following technical scheme: a fracturing soluble signal ball, including the ball body, the ball body adopts metal composite material, the ball body still includes cladding layer, inner membrane one, sandwich layer, inner membrane two and core layer, wherein, the core layer is integrally formed into spherical structure, the inner membrane two is coated on the outer periphery of core layer and forms the inner membrane structure, the sandwich layer is uniformly wrapped on the outer periphery of inner membrane two and forms the spherical structure, the inner membrane one is coated on the outer periphery of sandwich layer and forms the inner membrane structure, the cladding layer is uniformly wrapped on the outer periphery of inner membrane one and forms the spherical structure.

[0007] Preferably, the ball body is a multilayer solid structure from outside to inside, the core layer is a porous material layer, and diatomite, zeolite, white carbon black and mica material are selected to form a dispersion structure with metal.

[0008] Preferably, the inner membrane two and the inner membrane one are both aluminum alloy metal layers, and the sandwich layer is a magnesium alloy metal layer.

[0009] Preferably, the cladding layer is an organic material layer, which is an organic coating treated by chemical conversion film of phenolic resin.

[0010] Preferably, the interior of the core layer is provided with a slot hole according to needs for transmitting signals.

[0011] Preferably, the micro device is embedded in the interior of the slot hole.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The spherical body is provided with a multilayer solid structure from outside to inside, wherein the core layer is a porous ceramic material, is combined with metal to form a dispersion structure, improves the strength and conductivity of the porous material layer, and also helps to control the dissolution speed; the metal layer composed of the combination of the inner film one, the sandwich layer and the inner film two is sequentially arranged from outside to inside, the layered arrangement of different metals is combined with the strength plasticity and dissolution performance of different metals, a fracturing ball with an expected dissolution rate can be made, and the stability is improved.

[0014] 2. The utility model discloses a micro device for transmitting specific signals is arranged in the interior of the core layer according to needs, the interior of the core layer is provided with a slot hole, the micro device is embedded in the interior of the slot hole, the micro device can be selected and installed, for example, a sensor can be placed in the spherical body to monitor the parameters such as pressure, temperature and flow rate in real time, and can also be used to track the position and movement track of the soluble fracturing ball in the well, ensure that it reaches the target formation accurately, help to optimize the fracturing operation parameters, and improve the oil and gas exploitation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The utility model provides a soluble signal ball half -sectional view Figure One ;

[0016] Figure 2 The utility model discloses a soluble signal ball half -sectional view Figure Two ;

[0017] Figure 3 It is the three -dimensional schematic diagram of the whole soluble signal ball of the utility model;

[0018] Figure 4 It is the sectional structure schematic diagram of the soluble signal ball of the utility model.

[0019] In the drawing: 1, spherical body, 2, cladding layer, 3, inner film one, 4, sandwich layer, 5, inner film two, 6, core layer, 7, slot hole, 8, micro device. DETAILED DESCRIPTION

[0020] In the following, the utility model is further described in combination with the drawings and specific embodiments, and it should be explained that, under the premise of not conflicting, the following described each embodiment or each technical feature can be combined to form a new embodiment.

[0021] Referring to Figure 1 Figure 4 The fracturing soluble signal ball of the embodiment comprises a spherical body 1, the spherical body 1 is made of a metal composite material, and the spherical body 1 further comprises a cladding layer 2, an inner membrane one 3, a sandwich layer 4, an inner membrane two 5 and a core layer 6, wherein the core layer 6 is integrally formed into a spherical structure, the inner membrane two 5 is coated on the outer periphery of the core layer 6 to form an inner membrane structure, the sandwich layer 4 is uniformly wrapped on the outer periphery of the inner membrane two 5 to form a spherical structure, the inner membrane one 3 is coated on the outer periphery of the sandwich layer 4 to form an inner membrane structure, and the cladding layer 2 is uniformly wrapped on the outer periphery of the inner membrane one 3 to form a spherical structure.

[0022] Further, the spherical body 1 is a multilayer solid structure from the outside to the inside, the core layer 6 is a porous ceramic material, and materials such as diatomite, zeolite, white carbon black, mica and vermiculite are selected, which have good chemical stability and high-temperature resistance and can remain stable in a complex formation environment, and a dispersion structure is formed by being combined with metal, and the metal can be selected from one or more of iron, magnesium, aluminum, copper, silicon, calcium, nickel, zinc and titanium, and the addition of the metal material can improve the strength and electrical conductivity of the porous material layer and also helps to control the dissolution rate;

[0023] Further, the sandwich layer 4 is a magnesium alloy metal layer, usually containing a plurality of alloy elements such as Al, Zn, Cu, Ni, Mn, Co, Cr, Fe, Y and Si, and the magnesium alloy metal layer can obtain high strength and good plasticity through alloying and heat treatment, can withstand a certain pressure and impact force, and has solubility and can gradually dissolve in a specific electrolyte solution;

[0024] Further, the inner membrane two 5 and the inner membrane one 3 are both aluminum alloy metal layers, based on aluminum, with the addition of other elements such as Zn, Fe, Cu and Ni, and the aluminum alloy metal layer also obtains good mechanical properties through alloying and optimization of processing technology, but the strength and plasticity are slightly inferior to those of the magnesium alloy metal layer, and also has the characteristics of degradability or solubility, but the dissolution rate is lower than that of the magnesium alloy metal layer under the same conditions;

[0025] Specifically, the metal layers composed of the inner membrane one 3, the sandwich layer 4 and the inner membrane two 5 are sequentially arranged from the outside to the inside, and the fracturing ball with the expected dissolution rate can be prepared by using the layered arrangement of different metals and combining the strength, plasticity and dissolution performance of different metals, so as to improve the stability;

[0026] ​Further, the coating layer 2 is an organic material layer, which is an organic coating layer treated by chemical conversion film of phenolic resin. The phenolic resin has high strength and heat resistance, can keep stable under high temperature and high pressure, helps to improve the forming efficiency of the ball body 1, makes it easier to form in the manufacturing process, and can ensure the smoothness and uniformity of its surface, which is beneficial to improve the quality and performance of the ball body 1, can also effectively control the corrosion rate of the internal core, and can slow down the contact between the ball body 1 and the formation fluid in the initial stage of entering the formation, reduce the corrosion rate, and keep the structural integrity of the ball body 1 within a certain period of time, meet the needs of fracturing operation;

[0027] Further, the core layer 6 is provided with a micro device 8 for sending specific signals inside as needed, and the core layer 6 is provided with a slot hole 7, and the micro device 8 is embedded in the slot hole 7. The micro device 8 can be selected and installed according to the needs, for example, a sensor can be placed in the ball to monitor the parameters such as pressure, temperature and flow rate in real time, and can also be used to track the position and movement trajectory of the soluble fracturing ball in the well, ensure its accurate arrival at the target formation, and help to optimize the fracturing operation parameters and improve the oil and gas production efficiency.

[0028] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A soluble signal sphere for fracturing, comprising a sphere body (1), characterized in that, The sphere body (1) is made of metal composite material. The sphere body (1) also includes a covering layer (2), an inner membrane one (3), a sandwich layer (4), an inner membrane two (5) and a core layer (6). The core layer (6) is integrally formed into a sphere structure. The inner membrane two (5) is coated on the outer periphery of the core layer (6) to form an inner membrane structure. The sandwich layer (4) is uniformly wrapped around the outer periphery of the inner membrane two (5) to form a sphere structure. The inner membrane one (3) is coated on the outer periphery of the sandwich layer (4) to form an inner membrane structure. The covering layer (2) is uniformly wrapped around the outer periphery of the inner membrane one (3) to form a sphere structure.

2. The soluble signal ball for fracturing according to claim 1, characterized in that, The sphere body (1) has a multi-layer solid structure from the outside to the inside. The core layer (6) is a porous material layer, which is made of diatomaceous earth, zeolite, white carbon black and mica, and is combined with metal to form a diffuse structure.

3. The soluble signal ball for fracturing according to claim 1, characterized in that, Both inner membrane 2 (5) and inner membrane 1 (3) are aluminum alloy metal layers, and the sandwich layer (4) is a magnesium alloy metal layer.

4. The soluble signal ball for fracturing according to claim 1, characterized in that, The coating layer (2) is an organic material layer, which is an organic coating of phenolic resin treated with a chemical conversion film.

5. A soluble signal ball for fracturing according to claim 1, characterized in that, The core layer (6) is provided with a micro device (8) for transmitting signals as needed, and the core layer (6) has slots (7) inside.

6. A soluble signal ball for fracturing according to claim 5, characterized in that, The micro-device (8) is embedded inside the slot (7).

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