Electronic fracturing sliding sleeve

Abstract

The utility model relates to an electronic fracturing sliding sleeve which comprises a sliding sleeve assembly, a lock cylinder and a soluble ball, the lock cylinder is fixedly connected with the soluble ball, the soluble ball is located at the inlet end of the sliding sleeve assembly after the lock cylinder is connected with the sliding sleeve assembly in a sleeved mode, a locating groove is formed in the inner wall of the sliding sleeve assembly, an open groove is formed in the outer wall of the sliding sleeve assembly, and the locating groove is located in the open groove. An electronic induction device used for detecting the lock cylinder is installed in the open groove, and a positioning block matched with the positioning groove is arranged on the outer wall of the lock cylinder. Through cooperation of the positioning block and the positioning groove, whether installation is in place or not is determined, the position is confirmed through the electronic induction device, the situation that installation point positions are not matched is avoided, and preconditions are provided for follow-up fracturing construction.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas development, in particular to an electronic fracturing sleeve. Background Art

[0002] Fracturing sleeves are mainly used in industries such as oilfield development and shale gas development. When in use, after connecting the sleeve with the casing, during construction, a step-by-step fracturing method from back to front and from top to bottom is adopted, and soluble opening keys are pumped into the wellhead to automatically identify and open the target interval.

[0003] During the fracturing process, when the soluble opening key enters the position in the sleeve, due to different levels, the outer shapes are also different, and the sleeve also needs to design corresponding inner cavities according to different levels of opening keys. During implementation, if the position of the opening key does not match the position in the sleeve, it is difficult to detect, which affects subsequent fracturing construction. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electronic fracturing sleeve to solve the problems encountered in the above background art.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] An electronic fracturing sleeve includes a sleeve assembly, a lock core and a soluble ball. The lock core is fixedly connected with the soluble ball. After the lock core is sleeved and connected with the sleeve assembly, the soluble ball is located at the inlet end of the sleeve assembly. A positioning groove is formed on the inner wall of the sleeve assembly, and a slot is formed on the outer wall of the sleeve assembly. An electronic induction device for detecting the lock core is installed in the slot, and a positioning block matching the positioning groove is arranged on the outer wall of the lock core.

[0007] In the above solution, the positioning groove is a ring-shaped groove structure, and the positioning groove is any one of a U-shaped, V-shaped and trapezoidal structure.

[0008] In the above solution, the electronic induction device includes a circuit board, a magnetic inductor, a liquid lock releaser and a battery. The circuit board is respectively connected with the magnetic inductor, the liquid lock releaser and the battery through wires, and the circuit board is signal-connected with an external background control device. The working end of the magnetic inductor is attached to the inner wall of the sleeve assembly. As a preferred solution, a plurality of slots are provided and evenly arranged on the outer peripheral surface of the sleeve assembly. The magnetic inductor, the liquid lock releaser and the battery are respectively installed in different slots. The circuit board and the magnetic inductor are installed together after being connected, and a wire pipe for the wire to pass through is arranged between two adjacent slots.

[0009] In the above solution, the sliding sleeve assembly includes an outer housing, an inner diameter pipe, an inlet pipe, and an outlet pipe. The outer housing and the inner diameter pipe are fixedly connected by screws, and a sealing ring is also installed at the connection; the inlet pipe is installed at the inlet end of the outer housing; the outlet pipe is installed at the outlet end of the outer housing.

[0010] In the above solution, a transition piece is further included. The outer side of the transition piece is connected to the outlet pipe through a fastening structure, and the inner side of the transition piece is inserted between the outer housing and the inner diameter pipe through a fastening structure. Among them, a stepped groove is formed at the outlet end of the inner diameter pipe and the inlet of the outlet pipe.

[0011] In the above solution, a guiding surface is provided at the working end of the lock core. The soluble ball is connected to the lock core through a key holder, and an induction film is provided on the outer surface of the soluble ball. As a preferred solution, a top head is provided at the head of the key holder, and a tray connected to the soluble ball is provided at the tail of the key holder.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: By providing a positioning groove on the inner wall of the sliding sleeve assembly, a slotted groove is provided on the outer wall of the sliding sleeve assembly, and an electronic induction device for detecting the lock core is installed in the slotted groove. A positioning block matching the positioning groove is provided on the outer wall of the lock core. Through the cooperation of the positioning block and the positioning groove, it is determined whether the installation is in place, and the position is further confirmed by the electronic induction device, avoiding the situation of mismatched installation points, and providing a prerequisite for subsequent fracturing construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0014] Figure 1 is a schematic structural diagram of the sliding sleeve assembly in the present utility model;

[0015] Figure 2 is a schematic structural diagram of the lock core and the soluble ball in the present utility model;

[0016] Figure 3 is a schematic installation diagram of the electronic induction device on the outer housing in the present utility model.

[0017] Reference numerals in the figures: 1 - sliding sleeve assembly; 11 - outer housing; 111 - slotted groove; 112 - cover plate; 113 - circuit board; 114 - magnetic inductor; 115 - conduit; 116 - liquid lock releaser; 117 - battery; 118 - sealing ring; 12 - inner diameter tube; 121 - positioning groove; 13 - inlet tube; 14 - outlet tube; 15 - transition piece; 151 - fastening structure; 152 - stepped groove; 2 - lock core; 21 - positioning block; 22 - guiding surface; 3 - soluble ball; 31 - key holder; 32 - top head; 33 - tray; 34 - sensing film. Detailed implementation manners

[0018] In order to make the technical means, creative features, achieved purposes and functions realized by the present utility model easy to understand, the present utility model will be further described in detail below with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0019] According to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various structural ways and implementation ways that can be mutually replaced. Therefore, the following detailed implementation manners and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or regarded as a limitation or restriction on the technical solution of the present utility model.

[0020] The technical solution of the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Embodiment 1, as Figures 1-3 shown, an electronic fracturing sliding sleeve includes a sliding sleeve assembly 1, a lock core 2 and a soluble ball 3. The lock core 2 is fixedly connected to the soluble ball 3, and both are made of soluble materials, which are existing products and can withstand a pressure difference ≥ 70 MPa within 6 hours in a fracturing environment and completely dissolve after 120 hours. After the lock core 2 is sleeved and connected with the sliding sleeve assembly 1, its soluble ball 3 is located at the inlet end of the sliding sleeve assembly 1 and can only enter the sliding sleeve assembly 1 by pushing during fracturing.

[0022] A positioning groove 121 is provided on the inner wall of the sliding sleeve assembly 1, and a slotted groove 111 is provided on the outer wall of the sliding sleeve assembly 1. An electronic sensing device for detecting the lock core 2 is installed in the slotted groove 111, and a positioning block 21 matching the positioning groove 121 is provided on the outer wall of the lock core 2. Through the cooperation of the positioning block 21 and the positioning groove 121, it is determined whether the installation is in place, and the position is also confirmed by the electronic sensing device to avoid the situation of mismatched installation positions.

[0023] Among them, the positioning groove 121 is an annular groove structure, and the positioning groove 121 can be any one of a U-shaped, V-shaped, or trapezoidal structure. The positioning block 21 on the outer wall of the lock core 2 will also be of a corresponding structure.

[0024] In the above solution, the electronic induction device includes a circuit board 113, a magnetic inductor 114, a liquid lock releaser 116, and a battery 117. The circuit board 113 is respectively connected to the magnetic inductor 114, the liquid lock releaser 116, and the battery 117 through wires. The battery 117 is used for power supply. The magnetic inductor 114 is used to sense the position of the lock core 2. The liquid lock releaser 116 is used to release the lock on the lock core 2, enabling lock cores 2 of different levels to pass through the sliding sleeve assembly 1 and move to another sliding sleeve assembly 1 to be locked. The circuit board 113 is signal-connected to an external background control device. The working end of the magnetic inductor 114 is attached to the inner wall of the sliding sleeve assembly 1 for easy sensing, mainly for sensing with the soluble ball 3 at the rear end.

[0025] The staff sends a signal through the background control device to use the liquid lock releaser 116 to lock the lock core 2 and determine the position of the lock core 2 reaching which sliding sleeve assembly 1. The electronic sliding sleeve is controlled by a programmable logic chip on the circuit board 113 and can be applied to almost all plug systems. There is no necking inside the sliding sleeve, significantly improving the cementing efficiency and quality.

[0026] A number of slots 111 are provided and evenly arranged on the outer peripheral surface of the sliding sleeve assembly 1. The magnetic inductor 114, the liquid lock releaser 116, and the battery 117 are respectively installed in different slots 111. After the circuit board 113 and the magnetic inductor 114 are connected, they are installed together. A wiring pipe 115 for wires to pass through is provided between two adjacent slots 111. The battery 117 uses a high-polymer battery pack. The life cycle of the battery can be used for about 150 days at 66 degrees Celsius, about 130 days at 121 degrees Celsius, and about 100 days at 162 degrees Celsius.

[0027] Embodiment 2, on the basis of Embodiment 1, please refer to Figure 1 , the sliding sleeve assembly 1 includes an outer shell 11, an inner diameter pipe 12, an inlet pipe 13, and an outlet pipe 14. The outer shell 11 and the inner diameter pipe 12 are fixedly connected by screws. The length of the outer shell 11 is greater than that of the inner diameter pipe 12 to facilitate docking with the inlet pipe 13 and the outlet pipe 14 on both sides. A plurality of sealing rings 118 are also installed at the connection between the outer shell 11 and the inner diameter pipe 12 for sealing.

[0028] The inlet pipe 13 is installed at the inlet end of the outer shell 11. A clamping groove is provided inside the inlet pipe 13, and the inner side of the inlet pipe 13 is fixed to the outer shell 11 through the clamping groove. The outlet pipe 14 is installed at the outlet end of the outer shell 11. A clamping groove is also provided inside the outlet pipe 14, and the inner side of the outlet pipe 14 is fixed to the outer shell 11 through the clamping groove.

[0029] As a preferred solution, the sliding sleeve assembly 1 includes an outer housing 11, an inner diameter pipe 12, an inlet pipe 13, an outlet pipe 14, and further includes a transition piece 15. The transition piece 15 is located between the outer housing 11 and the outlet pipe 14. The outer side of the transition piece 15 is connected to the outlet pipe 14 through a fastening structure, and the inner side of the transition piece 15 is inserted between the outer housing 11 and the inner diameter pipe 12 through a fastening structure. The fastening structure is a stepped structure and has the function of sealing the connection.

[0030] Wherein, the outlet end of the inner diameter pipe 12 and the inlet of the outlet pipe 14 form a stepped groove 152. According to different lengths, the stepped groove 152 adapts to the outer wall of the lock cores 2 of different grades and models, and combines with the electronic induction device to determine whether it is installed at the point.

[0031] Example 3, on the basis of Example 1, please refer to Figure 2 , a guiding surface 22 is provided at the working end of the lock core 2 to facilitate insertion into the inside of the sliding sleeve assembly 1. The soluble ball 3 is connected to the lock core 2 through a key holder 31. An induction film 34 is provided on the outer surface of the soluble ball 3. The induction film 34 is used to generate induction with the magnetic inductor 114 in the electronic induction device to determine the position of the lock core 2.

[0032] The head of the key holder 31 is provided with a top head 32 to facilitate insertion into the inside of the lock core 2, and then its outer wall is clamped with the inner wall of the lock core 2. The tail of the key holder 31 is provided with a tray 33 connected to the soluble ball 3. The tray 33 is a spherical groove structure for cooperating with the soluble ball 3.

[0033] The utility model can be applied to vertical wells, large deviated wells, and horizontal wells, without being limited by the well depth. The sliding channel assembly 1 is set in size according to grades and models, without being limited by the number of fracturing stages. The construction plan can be optimized, the use of coiled tubing during construction can be eliminated, and the investment in surface equipment can be reduced. Therefore, it has the functions of short construction interval time and high construction efficiency.

[0034] In addition, the fracturing sliding sleeve can also reduce the occupation of equipment and site. The large-diameter design of the electronic fracturing sliding sleeve reduces the demand for water horsepower during construction, reduces the demand for cranes during construction, and reduces the time required for the entire operation.

[0035] The above-mentioned specific implementation manners further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above-mentioned is only the specific implementation manners of the present utility model, and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An electronic fracturing sliding sleeve, comprising a sliding sleeve assembly (1), a lock core (2) and a soluble ball (3), wherein the lock core (2) is fixedly connected to the soluble ball (3), and after the lock core (2) is sleeved and connected to the sliding sleeve assembly (1), the soluble ball (3) is located at the inlet end of the sliding sleeve assembly (1), and is characterized in that: A positioning groove (121) is formed on the inner wall of the sliding sleeve assembly (1), and a slotted opening (111) is formed on the outer wall of the sliding sleeve assembly (1). An electronic induction device for detecting the lock core (2) is installed in the slotted opening (111), and a positioning block (21) matching the positioning groove (121) is provided on the outer wall of the lock core (2).

2. The electronic fracturing sliding sleeve according to claim 1, characterized in that: The positioning groove (121) is a ring-shaped groove structure, and the positioning groove (121) is any one of a U-shaped, V-shaped, and trapezoidal structure.

3. The electronic fracturing sliding sleeve according to claim 1, wherein: The electronic induction device includes a circuit board (113), a magnetic inductor (114), a liquid lock releaser (116), and a battery (117). The circuit board (113) is respectively connected to the magnetic inductor (114), the liquid lock releaser (116), and the battery (117) through wires. The circuit board (113) is in signal connection with an external background control device, and the working end of the magnetic inductor (114) is attached to the inner wall of the sliding sleeve assembly (1).

4. The electronic fracturing sliding sleeve according to claim 3, characterized in that: A plurality of slotted openings (111) are provided and are evenly arranged on the outer peripheral surface of the sliding sleeve assembly (1). The magnetic inductor (114), the liquid lock releaser (116), and the battery (117) are respectively installed in different slotted openings (111). After the circuit board (113) and the magnetic inductor (114) are connected, they are installed together. A wire conduit (115) for the wire to pass through is provided between two adjacent slotted openings (111).

5. The electronic fracturing sliding sleeve according to claim 1, wherein: The sliding sleeve assembly (1) includes an outer housing (11), an inner diameter pipe (12), an inlet pipe (13), and an outlet pipe (14). The outer housing (11) and the inner diameter pipe (12) are fixedly connected by screws, and a sealing ring (118) is also installed at the connection. The inlet pipe (13) is installed at the inlet end of the outer housing (11). The outlet pipe (14) is installed at the outlet end of the outer housing (11).

6. The electronic fracturing sliding sleeve according to claim 5, characterized in that: A transition piece (15) is further included. The outer side of the transition piece (15) is connected to the outlet pipe (14) through a fastening structure, and the inner side of the transition piece (15) is inserted between the outer housing (11) and the inner diameter pipe (12) through a fastening structure.

7. An electronic fracturing sliding sleeve according to claim 6, characterized in that: A stepped groove (152) is formed at the outlet end of the inner diameter pipe (12) and the inlet of the outlet pipe (14).

8. An electronic fracturing sliding sleeve according to claim 1, wherein: A guiding surface (22) is provided at the working end of the lock core (2). The soluble ball (3) is connected to the lock core (2) through a key holder (31), and an induction film (34) is provided on the outer surface of the soluble ball (3).

9. The electronic fracturing sliding sleeve according to claim 8, wherein: The head of the key holder (31) is provided with a top head (32), and the tail of the key holder (31) is provided with a tray (33) connected to the soluble ball (3).

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