Horizontal well multistage openable sliding sleeve fracturing device

Abstract

The utility model provides a multistage openable sliding sleeve fracturing device for a horizontal well, which belongs to the field of oil exploration and comprises a connecting sleeve, a shell is arranged at the bottom of the connecting sleeve, a starting component is arranged on the inner wall of the connecting sleeve, first holes are formed in two sides of the inner wall of the shell, and fracturing components are arranged in the areas of the edges of the inner walls of the two first holes. An air inflation structure with the cylindrical outer portion is fed into a connecting sleeve and penetrates through a positioning sleeve to move into a butt joint channel in a movable frame to be clamped with the butt joint channel, the surface of the cylindrical air inflation structure is clamped with a positioning groove in the inner wall of the positioning sleeve, and a pump body connector is connected with two air connection pipes to supply air into two cavities. The air pressure in the two cavities is increased to push the two pistons to move, the two pistons drive the two push rods to move and penetrate through the two through holes, the two push rods drive the moving ring to move, the moving ring drives the fracturing structure to move on the inner wall of the shell, and therefore the opening operation of the sliding sleeve of the device is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oil exploration, concretely to horizontal well multistage open-close type sliding sleeve fracturing device. BACKGROUND

[0002] The fracturing completion technology for low-permeability and tight oil reservoirs at home and abroad mainly includes two categories of open-hole multistage staged fracturing completion technology and casing cementing multistage staged fracturing completion technology, and the mainstream technology covers ball-drop sliding sleeve type multistage staged fracturing completion, pump-packing multistage staged fracturing completion and the like, and in the staged reconstruction measures of horizontal wells, the sliding sleeve switch tool needs to be used, the fracturing sliding sleeve currently used includes differential pressure type sliding sleeve and ball-drop type sliding sleeve, through the retrieval, the application number CN201511030111.8 discloses a switch type double sliding sleeve assembly for horizontal well staged fracturing, which records the fracturing sliding sleeve and the screen pipe sliding sleeve, wherein the bottom end of the fracturing sliding sleeve and the top end of the screen pipe sliding sleeve are connected through threads, the device can prevent a large amount of proppant from being returned, which affects the fracturing effect, the inner diameter of the remaining well pipe column is large, which is convenient for post-processing, the sliding sleeve can be closed or opened to control production in the later period, and arbitrary multistage fracturing can be realized, but the above description still has the following defects in actual use: the device is inconvenient for adjusting and closing the sand blasting holes of multiple fracturing positions in structure when being used, so that different equipment structures need to be used for fracturing matching in the construction process, and therefore it is necessary to design a horizontal well multistage open-close type sliding sleeve fracturing device with high practicability. SUMMARY

[0003] The utility model aims at providing a horizontal well multistage open-close type sliding sleeve fracturing device to solve the problems in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme: a horizontal well multistage open-close type sliding sleeve fracturing device, including the connecting sleeve, the bottom of connecting sleeve is provided with the shell, the inner wall of connecting sleeve is equipped with starting assembly, the both sides of shell inner wall are equipped with the first hole, and the area of two first hole inner wall edges is equipped with fracturing assembly.

[0005] Starting assembly, the starting assembly includes the positioning sleeve installed in the inner wall of the connecting sleeve, the inner wall of the positioning sleeve is provided with a positioning groove, the both sides of the inner wall of the positioning groove are provided with a gas connection pipe, the other end of the two gas connection pipes is connected with the both sides of the inner wall of the connecting sleeve, and extends to the cavity provided in the connecting sleeve, the inner wall of the two cavities is slidably connected with a piston, one side of the two pistons is fixedly connected with a push rod, the other end of the two push rods is connected with the through hole provided in the other side of the inner wall of the two cavities, and the port of the two push rods is connected with the fracturing assembly.

[0006] The utility model relates to a fracturing assembly, the fracturing assembly includes the mobile frame installed in two first hole inner wall edge area, one end of mobile frame is fixedly connected with mobile ring, one side of mobile ring is fixedly connected with the port of two push rods, the both sides of mobile frame inner wall all are equipped with the second hole, and the bottom of mobile frame is fixedly connected with the top of fixed ring through a plurality of telescopic rods, and the surface of a plurality of telescopic rods all is covered with reset spring, and the surface of mobile frame bottom end is insertedly connected with the inner wall of fixed ring, and the edge side of bottom is fixedly connected with the limiting ring.

[0007] As a preferred scheme of the utility model: the area between the mobile frame and the two through holes is provided with a buffer ring, and the buffer ring is sleeved on the surface of the two push rods.

[0008] As a preferred scheme of the utility model: the number of mobile frames is several, and the mobile frames are arranged at equal intervals in the inner wall of the shell.

[0009] As a preferred scheme of the utility model: the surface of the bottom end of the connecting sleeve is provided with an annular groove, the inner wall of the annular groove is clamped and connected with the inner wall of the shell, a connecting ring is arranged at the connecting position of the connecting sleeve and the shell, and the surface of the connecting ring is provided with a plurality of connecting pins.

[0010] As a preferred scheme of the utility model: the surface of the shell is connected with a plurality of auxiliary short sections through a plurality of auxiliary rings.

[0011] As a preferred scheme of the utility model: the inside of the mobile frame is provided with a docking channel, and the inner wall of the docking channel can be positioned and clamped with an external structure.

[0012] As a preferred scheme of the utility model: the number of connecting sleeves is two, and the two connecting sleeves are connected to the top surface and the bottom surface of the shell.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) the cylindrical inflation structure is sent into the connecting sleeve, moves into the docking channel in the mobile frame through the positioning sleeve, is clamped with the positioning groove in the inner wall of the positioning sleeve, the pump body interface is connected with the two gas connection pipes to supply gas into the two chambers, the gas pressure in the two chambers is increased to drive the two pistons to move, the two pistons drive the two push rods to move and pass through the two through holes, the two push rods drive the mobile ring to move, and the mobile ring drives the fracturing structure to move in the inner wall of the shell, so that the opening operation of the device sliding sleeve is realized.

[0015] (2) through the mobile ring stress driven mobile frame in the inner wall of the shell, mobile frame bottom end surface through the inner wall of the fixed ring, and cooperate with the fixed ring on a number of telescopic rod and reset spring extrusion, until two second hole position and two first hole position corresponding, complete fracturing sandblasting operation, operation after external structure moves out, two gas connection pipe will two chamber gas exhaust, and cooperate with the fixed ring on a number of telescopic rod and reset spring elastic drive mobile frame to restore the initial state, so as to realize the device sliding sleeve closing operation, mobile frame cooperate with the bottom of the limit ring and the buffer ring on the surface of the push rod is convenient for the movement of the mobile frame limit, so that the device structure between a stable state of adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the utility model;

[0017] Figure 2 is a structural schematic diagram of the utility model;

[0018] Figure 3 is a part of the structural schematic diagram of the utility model;

[0019] Figure 4 is a start-up assembly and fracturing assembly structural schematic diagram of the utility model.

[0020] In the drawing: 1, connecting sleeve; 11, shell; 12, first hole; 13, chamber; 14, through hole; 15, buffer ring; 16, annular groove; 17, connecting ring; 18, auxiliary ring; 2, start-up assembly; 21, positioning sleeve; 22, positioning groove; 23, gas connection pipe; 24, piston; 25, push rod; 3, fracturing assembly; 31, mobile frame; 32, mobile ring; 33, second hole; 34, telescopic rod; 35, fixed ring; 36, reset spring; 37, limit ring; 38, butt joint channel. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-4The utility model provides a kind of horizontal well multistage open-close sliding sleeve fracturing device, including connecting sleeve 1, the bottom of connecting sleeve 1 is provided with shell 11, the inner wall of connecting sleeve 1 is equipped with starting assembly 2, the both sides of the inner wall of shell 11 are equipped with first hole 12, the area of the inner wall edge of two first holes 12 is equipped with fracturing assembly 3;

[0023] Please refer to Figure 4 Starting assembly 2, starting assembly 2 includes the positioning sleeve 21 installed in the inner wall of connecting sleeve 1, the inner wall of positioning sleeve 21 is equipped with positioning groove 22, the both sides of the inner wall of positioning groove 22 are provided with gas connection pipe 23, the other end of two gas connection pipes 23 is connected with the both sides of the inner wall of connecting sleeve 1, and extends to the cavity 13 equipped in the inside of connecting sleeve 1, the inner wall of two cavities 13 is slidably connected with piston 24, the side of two pistons 24 is fixedly connected with push rod 25, the other end of two push rods 25 is connected with the through hole 14 equipped in the other side of the inner wall of two cavities 13, and the port of two push rods 25 is connected with fracturing assembly 3.

[0024] Specific use: cylindrical inflatable structure outside is sent into connecting sleeve 1, and moves to the docking channel inside mobile frame 31 and is engaged with it by passing through positioning sleeve 21, the positioning groove 22 of the inner wall of positioning sleeve 21 is engaged with the surface of cylindrical inflatable structure, pump body interface is connected with two gas connection pipes 23 to supply gas to two cavities 13, the gas pressure in two cavities 13 increases to drive two pistons 24 to move, two pistons 24 drive two push rods 25 to move and pass through two through holes 14, two push rods 25 drive moving ring 32 to move, and moving ring 32 drives fracturing structure to move in the inner wall of shell 11, to realize the opening operation of device sliding sleeve.

[0025] Please refer to Figure 4 Fracturing assembly 3, fracturing assembly 3 includes mobile frame 31 installed in the inner wall edge region of two first holes 12, one end of mobile frame 31 is fixedly connected with moving ring 32, the side of moving ring 32 is fixedly connected with the port of two push rods 25, the both sides of the inner wall of mobile frame 31 are equipped with second hole 33, and the top of fixed ring 35 is fixedly connected with the bottom of mobile frame 31 through a plurality of telescopic rods 34, the surface of a plurality of telescopic rods 34 is all equipped with reset spring 36, the surface of the bottom end of mobile frame 31 is connected with the inner wall of fixed ring 35 in penetration, and the side of bottom is fixedly connected with limiting ring 37.

[0026] The area between mobile frame 31 and two through holes 14 is equipped with buffer ring 15, and buffer ring 15 is sleeved on the surface of two push rods 25.

[0027] Specific use: the moving ring 32 is forced to drive the moving frame 31 to move in the inner wall of the shell 11, the bottom surface of the moving frame 31 penetrates the inner wall of the fixed ring 35, and the fixed ring 35 is extruded to the plurality of telescopic rods 34 and the reset spring 36, until the position of the two second holes 33 corresponds to the position of the two first holes 12, the operation of fracturing and sand blasting is completed, the external structure is removed after the operation, the two gas connection pipes 23 discharge the gas in the two chambers 13, and the plurality of telescopic rods 34 and the reset spring 36 on the fixed ring 35 drive the moving frame 31 to restore the initial state, so that the closing operation of the device sliding sleeve is realized, the moving frame 31 cooperates with the limiting ring 37 at the bottom and the buffer ring 15 on the surface of the push rod 25 to facilitate the limiting of the movement of the moving frame 31, so that the device structure is in a stable adjustment state.

[0028] Please refer to Figure 1 , the number of moving frames 31 is several, and they are arranged at equal intervals in the inner wall of the shell 11.

[0029] Specific use: the plurality of moving frames 31 are arranged at equal intervals in the inner wall of the shell 11 and the like structure, so that the device realizes the opening and closing adjustment of multistage sliding sleeve fracturing.

[0030] Please refer to Figure 3 , the surface of the bottom end of the connecting sleeve 1 is provided with an annular groove 16, the inner wall of the annular groove 16 is connected with the inner wall of the shell 11, the connecting part of the connecting sleeve 1 and the shell 11 is provided with a connecting ring 17, and the surface of the connecting ring 17 is provided with a plurality of connecting pins.

[0031] Specific use: the inner wall of the shell 11 is clamped with the annular groove 16 on the surface of the connecting sleeve 1, and the plurality of connecting pins on the surface of the connecting ring 17 are used for limiting and fixing the two.

[0032] Please refer to Figure 1 , Figure 2 , Figure 3 , the surface of the shell 11 is installed and connected with a plurality of auxiliary short sections through a plurality of auxiliary rings 18.

[0033] Specific use: the surface of the shell 11 cooperates with the plurality of auxiliary rings 18 to facilitate the installation and connection of the plurality of auxiliary short sections, so as to increase the use length of the shell 11 in the horizontal well.

[0034] Please refer to Figure 1 , the inside of the moving frame 31 is provided with a docking channel 38, and the inner wall of the docking channel 38 can be positioned and clamped with the external structure.

[0035] Specific use: the docking channel 38 in the inside of the moving frame 31 can be positioned and clamped with the external structure, so as to facilitate the auxiliary action for the opening and closing operation of the sliding sleeve fracturing.

[0036] Please refer toFigure 1 The number of the connecting sleeves 1 is two, and the two connecting sleeves 1 are connected to the top end surface and the bottom end surface of the shell 11.

[0037] In use, the two connecting sleeves 1 are connected to the top end and the bottom end of the shell 11, so as to facilitate the use of the device in the horizontal well.

[0038] In use, the cylindrical inflatable structure is sent into the connecting sleeve 1 and moves to the docking channel inside the moving frame 31 through the positioning sleeve 21 and is clamped there, the surface of the cylindrical inflatable structure is clamped with the positioning groove 22 in the inner wall of the positioning sleeve 21, the pump body interface is connected with the two gas connection pipes 23 to supply gas to the two chambers 13, the gas pressure in the two chambers 13 increases to drive the two pistons 24 to move, the two pistons 24 drive the two push rods 25 to move and pass through the two through holes 14, the two push rods 25 drive the moving ring 32 to move, the moving ring 32 drives the fracturing structure to move in the inner wall of the shell 11, so as to realize the opening operation of the device sliding sleeve; the moving ring 32 is driven by force to drive the moving frame 31 to move in the inner wall of the shell 11, the bottom end surface of the moving frame 31 passes through the inner wall of the fixed ring 35 and extrudes the plurality of telescopic rods 34 and the reset spring 36 in cooperation with the fixed ring 35, until the positions of the two second holes 33 correspond to the positions of the two first holes 12, the fracturing sand blasting and other operations are completed, the external structure is removed after the operation is completed, the gas in the two chambers 13 is discharged through the two gas connection pipes 23, and the moving frame 31 is driven to return to the initial state in cooperation with the plurality of telescopic rods 34 and the reset spring 36 on the fixed ring 35, so as to realize the closing operation of the device sliding sleeve, the moving frame 31 cooperates with the limiting ring 37 at the bottom and the buffer ring 15 on the surface of the push rod 25 to facilitate the limiting of the movement of the moving frame 31, so that the device structure is in a stable adjustment state.

[0039] The contents not described in detail in the description belong to the prior art known to those skilled in the art, although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-stage operable sliding sleeve fracturing device for horizontal wells, characterized in that, Includes a connecting sleeve (1), the bottom of the connecting sleeve (1) is provided with a shell (11), the inner wall of the connecting sleeve (1) is provided with a starting component (2), the inner walls of the shell (11) are provided with first holes (12) on both sides, and the area of ​​the inner wall edge of the two first holes (12) is provided with a fracturing component (3). The starting component (2) includes a positioning sleeve (21) installed on the inner wall of the connecting sleeve (1). The inner wall of the positioning sleeve (21) is provided with a positioning groove (22). Both sides of the inner wall of the positioning groove (22) are provided with air pipes (23). The other ends of the two air pipes (23) are inserted and connected to both sides of the inner wall of the connecting sleeve (1) and extend into the chamber (13) opened inside the connecting sleeve (1). The inner walls of the two chambers (13) are slidably connected with pistons (24). One side of the two pistons (24) is fixedly connected with push rods (25). The other ends of the two push rods (25) extend to the outside of the two chambers (13). The surface of the other end of the two push rods (25) is inserted and connected to the inner wall of the through hole (14) opened on the other side of the inner wall of the two chambers (13). The ports of the two push rods (25) are installed and connected to the fracturing component (3). The fracturing assembly (3) includes a movable frame (31) installed in the inner wall edge area of ​​two first holes (12). One end of the movable frame (31) is fixedly connected to a movable ring (32). One side of the movable ring (32) is fixedly connected to the port of two push rods (25). The inner wall of the movable frame (31) is provided with second holes (33) on both sides. The bottom of the movable frame (31) is fixedly connected to the top of a fixed ring (35) through several telescopic rods (34). The surface of several telescopic rods (34) is fitted with a return spring (36). The bottom surface of the movable frame (31) is interlocked with the inner wall of the fixed ring (35), and a limit ring (37) is fixedly connected to the bottom side.

2. The horizontal well multi-stage operable sliding sleeve fracturing device according to claim 1, characterized in that: A buffer ring (15) is provided in the area between the movable frame (31) and the two through holes (14), and the buffer ring (15) is sleeved on the surface of the two push rods (25).

3. The horizontal well multi-stage operable sliding sleeve fracturing device according to claim 1, characterized in that: The number of movable frames (31) is several, and they are evenly spaced on the inner wall of the outer shell (11).

4. The horizontal well multi-stage operable sliding sleeve fracturing device according to claim 1, characterized in that: The bottom surface of the connecting sleeve (1) is provided with an annular groove (16), the inner wall of the annular groove (16) is engaged with the inner wall of the outer shell (11), and a connecting ring (17) is provided at the connection between the connecting sleeve (1) and the outer shell (11), and a number of connecting pins are provided on the surface of the connecting ring (17).

5. A horizontal well multi-stage operable sliding sleeve fracturing device according to claim 1, characterized in that: The surface of the outer shell (11) is connected to several auxiliary sections by several auxiliary rings (18).

6. A horizontal well multi-stage operable sliding sleeve fracturing device according to claim 1, characterized in that: The movable frame (31) has a docking channel (38) inside, and the inner wall of the docking channel (38) can be engaged with the external structure for positioning.

7. A horizontal well multi-stage operable sliding sleeve fracturing device according to claim 1, characterized in that: The number of connecting sleeves (1) is two, and the two connecting sleeves (1) are connected to the top surface and the bottom surface of the outer shell (11).

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