Separate layer fracturing removable packer

Abstract

The utility model discloses a removable packer for separate layer fracturing, and relates to the technical field of packers. Comprising a central pipe, a connecting sleeve and a guide sleeve are arranged at the two ends of the central pipe respectively, a driving sleeve is arranged at the end, opposite to the connecting sleeve, of the guide sleeve, the driving sleeve slides on the outer side of the guide sleeve, and a plurality of flow guide holes are formed in the driving sleeve; and the separating mechanism is arranged on the outer side of the connecting sleeve and used for sealing and separating the drill hole, and the separating mechanism comprises a sealing piece and a control piece. Through the arrangement of the sealing piece and the control piece, the fixing pipe, the sealing sleeve, the supporting ring, the storage tank, the control ring, the connecting rod and the connecting ring are matched, so that the diameter of the sealing sleeve is adjusted in the using process, the sealing sleeve can be fully attached to a drill hole, and the phenomenon that when the irregular drill hole is packed, the sealing sleeve is not prone to falling off is avoided. A cylindrical rubber sleeve is difficult to be fully attached to the inner wall of a drill hole, so that a gap exists between the drill hole and the cylindrical rubber sleeve.

Description

TECHNICAL FIELD

[0001] The utility model relates to packer technical field, concretely relates to a layered fracturing removable packer. BACKGROUND

[0002] The layered fracturing removable packer is a downhole tool for layered fracturing operation in petroleum engineering, which can separate oil layers or gas layers of different horizons to individually fracture target layers, thereby improving the production and recovery of oil and gas wells.

[0003] The existing packer adopts multiple cylindrical rubber tubes to be stacked when sealing the borehole, and the stacked cylindrical rubber tubes are deformed under stress, so that the side wall of the rubber tube is in contact with the inner wall of the borehole, thereby achieving the sealing of the borehole. In actual use, the deformation range of the cylindrical rubber tube is small, so that the cylindrical rubber tube cannot be fully attached to the inner wall of the borehole when sealing irregular boreholes, resulting in a gap between the borehole and the cylindrical rubber tube. Therefore, a layered fracturing removable packer is proposed. SUMMARY

[0004] The utility model discloses a layered fracturing removable packer to solve the problem that the deformation range of the cylindrical rubber tube is small, so that the cylindrical rubber tube cannot be fully attached to the inner wall of the borehole when sealing irregular boreholes, resulting in a gap between the borehole and the cylindrical rubber tube.

[0005] The utility model discloses a layered fracturing removable packer to solve the problem that the deformation range of the cylindrical rubber tube is small, so that the cylindrical rubber tube cannot be fully attached to the inner wall of the borehole when sealing irregular boreholes, resulting in a gap between the borehole and the cylindrical rubber tube.

[0006] A layered fracturing removable packer, comprising:

[0007] A central tube is provided with a connecting sleeve and a guide sleeve at both ends, a driving sleeve is arranged at the end of the connecting sleeve relative to the guide sleeve, and the driving sleeve slides outside the guide sleeve, a plurality of flow guide holes are formed in the driving sleeve;

[0008] A separation mechanism is arranged outside the connecting sleeve and used for sealing the borehole, the separation mechanism comprises a sealing element and a control element, the sealing element is arranged outside the central tube and used for plugging the borehole, the control element is arranged outside the sealing element and used for controlling the sealing element, and the sealing element controls the on-off of the borehole in cooperation with the control element.

[0009] Further, at least one sealing ring is arranged on the contact side of the driving sleeve and the guide sleeve.

[0010] Further, the sealing piece comprises a fixed tube, the fixed tube is sleeved outside the central tube, one end of the fixed tube is provided with a blocking ring, the blocking ring abuts against the connecting sleeve, a sealing sleeve is sleeved outside the fixed tube, two ends of the sealing sleeve are connected with the fixed tube, a supporting ring is arranged inside the sealing sleeve, the supporting ring is in linear distribution along the axial line of the fixed tube.

[0011] Further, the control piece comprises a storage tank, the storage tank is hollow inside, the storage tank is sleeved outside the central tube, one end of the storage tank is connected with the fixed tube, a plurality of connecting holes are formed in the side of the storage tank relative to the fixed tube, a control ring is slidably connected inside the storage tank, and the control ring is further provided with a connecting piece relative to the guide sleeve.

[0012] Further, the connecting piece comprises a connecting rod, the connecting rod is a plurality of, the connecting rod is slidably arranged inside the storage tank, and the sliding direction of the connecting rod is parallel to the axial line of the central tube, one end of the connecting rod is connected with the control ring, and the other end of the connecting rod is provided with a connecting ring, and the connecting ring abuts against the driving sleeve.

[0013] Further, the connecting ring is provided with a sliding sleeve relative to one side of the storage tank, and the sliding sleeve is slidably arranged outside the storage tank, and the outer side of the connecting rod is further sleeved with a spring.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model discloses a sealing piece and control piece are arranged, realize through the cooperation of fixed tube, sealing sleeve, supporting ring, storage tank, control ring, connecting rod and connecting ring, thereby adjusting the diameter of sealing sleeve in the use process, make sealing sleeve can be fully combined with the drilling, avoid when the irregular drilling is sealed, cylindrical rubber tube is difficult to fully combine with the inner wall of drilling, lead to the gap between drilling and cylindrical rubber tube. ACCURATE DRAWINGS

[0016] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0017] Figure 2 It is the main sectional view of the utility model;

[0018] Figure 3 It is the guide sleeve enlarged view of the utility model;

[0019] Figure 4 It is the driving sleeve sliding view of the utility model;

[0020] Figure 5 It is the control piece enlarged view of the utility model;

[0021] Figure 6 It is the sealing piece enlarged view of the utility model;

[0022] 1, connecting sleeve; 2, guide sleeve; 201, flow guide hole; 202, driving sleeve; 203, sealing ring; 3, center tube; 4, sealing element; 401, fixed tube; 402, sealing sleeve; 403, support ring; 404, blocking ring; 5, control element; 501, storage tank; 502, control ring; 503, sliding sleeve; 504, connecting rod; 505, connecting ring; 506, connecting hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0025] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] The electrical components appearing in this document are all connected with the main controller and 220V mains of the outside world, and the main controller can be a conventional known device such as a computer for control.

[0027] In the description of the embodiments of the present application, it should be noted that the directions or position relationships indicated by the terms "inner", "outer", "upper", etc. are based on the directions or position relationships shown in the drawings, or the directions or position relationships commonly placed when the product of the present application is used, which are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular direction, be constructed and operated in a particular direction, therefore, cannot be understood as limiting the present application.

[0028] As Figures 1 to 6As shown in the figure, a layered fracturing retrievable packer comprises a central pipe 3, a connecting sleeve 1 and a guide sleeve 2 arranged at both ends of the central pipe 3, a driving sleeve 202 arranged at the end of the guide sleeve 2 relative to the connecting sleeve 1, and the driving sleeve 202 slides outside the guide sleeve 2, a plurality of flow guide holes 201 are arranged inside the driving sleeve 202; a separation mechanism arranged outside the connecting sleeve 1 for sealing the borehole, the separation mechanism comprises a sealing element 4 and a control element 5, the sealing element 4 is arranged outside the central pipe 3 for sealing the borehole, the control element 5 is arranged outside the sealing element 4 for controlling the sealing element 4, and the sealing element 4 cooperates with the control element 5 to control the on-off of the borehole, specifically, in the use process, first connect the connecting sleeve 1 with the oil pipe, so that the connecting sleeve 1, the central pipe 3, the sealing element 4, the control element 5 and the guide sleeve 2 can move with the oil pipe, ensuring that the sealing element 4 and the control element 5 can stably seal the borehole during use, the guide sleeve 2 can also be installed with a plug and the connecting sleeve 1 according to the use requirement during use, the connecting sleeve 1 can also be installed with a fracturing device according to the requirement, the fracturing device and the plug are prior art and will not be explained here, the connecting sleeve 1 and the guide sleeve 2 are installed through threads during use, which facilitates quick installation and disassembly of the connecting sleeve 1 and the guide sleeve 2 during use, and the flow guide holes 201 can guide the liquid inside the central pipe 3 during use, ensuring that the liquid inside the central pipe 3 can drive the driving sleeve 202 to slide along the guide sleeve 2 through the flow guide holes 201.

[0029] As Figures 1 to 6 shown, the driving sleeve 202 is also provided with at least one sealing ring 203 on the side in contact with the guide sleeve 2, specifically, the sealing ring 203 seals the gap between the driving sleeve 202 and the guide sleeve 2 during use, avoiding leakage of liquid through the gap between the driving sleeve 202 and the guide sleeve 2 during driving.

[0030] As Figures 1 to 6As shown, the sealing member 4 comprises a fixed tube 401 sleeved outside the central tube 3, and the fixed tube 401 is provided with a blocking ring 404 at one end, and the blocking ring 404 abuts against the connecting sleeve 1. The fixed tube 401 is sleeved with a sealing sleeve 402 outside, and the sealing sleeve 402 is connected with the fixed tube 401 at both ends. The sealing sleeve 402 is provided with a plurality of support rings 403 inside, and the support rings 403 are linearly distributed along the axis of the fixed tube 401. Specifically, in the use process, the drilling hole is sealed by the cooperation of the fixed tube 401 and the sealing sleeve 402, so as to avoid the leakage of pressure in the fracturing process. The support rings 403 and the fixed tube 401 can maintain the shape of the sealing sleeve 402 in the use process, so as to ensure that the sealing sleeve 402 can stably seal the drilling hole in the use process. The sealing sleeve 402 is made of rubber material, so as to ensure that the sealing sleeve 402 can stably contact with the drilling hole in the use process. The thickness of the sealing sleeve 402 is selected according to the actual use requirement, so as to ensure that the sealing sleeve 402 can meet the use requirement in the sealing process. The sealing sleeve 402 and the fixed tube 401 can be connected by welding or pressing disc. Hydraulic oil is filled between the sealing sleeve 402 and the fixed tube 401, so as to further ensure that the sealing sleeve 402 can stably seal the drilling hole in the use process. The support rings 403 and the sealing sleeve 402 are connected by clamping grooves, so as to ensure the stability of the connection between the support rings 403 and the sealing sleeve 402.

[0031] As shown in the figure, Figures 1 to 6 The control member 5 comprises a storage tank 501, which is hollow inside. The storage tank 501 is sleeved outside the central tube 3, and one end of the storage tank 501 is connected with the fixed tube 401. A plurality of connecting holes 506 are formed in the storage tank 501 relative to the fixed tube 401 side. The control ring 502 is slidably connected inside the storage tank 501, and the control ring 502 is further provided with a connecting member relative to the guide sleeve 2 side. Specifically, in the use process, the connecting member drives the control ring 502 to add hydraulic oil inside the storage tank 501 to the inside of the sealing sleeve 402, so that the sealing sleeve 402 expands, and the drilling hole is sealed. The storage tank 501 stores hydraulic oil. The hydraulic oil flows between the sealing sleeve 402 and the storage tank 501 through the connecting holes 506, so as to adjust the amount of hydraulic oil inside the sealing sleeve 402 in the use process.

[0032] As shown in the figure, Figures 1 to 6As shown, the connecting piece includes connecting rods 504, the connecting rods 504 are multiple, the connecting rods 504 slide inside the storage tank 501, and the sliding direction of the connecting rods 504 is parallel to the axis of the central pipe 3, one end of the connecting rods 504 is connected with the control ring 502, the other end of the connecting rods 504 is provided with a connecting ring 505, and the connecting ring 505 abuts against the driving sleeve 202, specifically, the driving sleeve 202 drives the control ring 502 to slide inside the storage tank 501 through the cooperation of the connecting ring 505 and the connecting rods 504 in the moving process, so as to control the hydraulic oil inside the storage tank 501.

[0033] As shown in the figure, Figures 1 to 6 As shown, the connecting ring 505 is provided with a sliding sleeve 503 relative to the side of the storage tank 501, and the sliding sleeve 503 slides outside the storage tank 501, and the outside of the connecting rod 504 is further sleeved with a spring, specifically, the sliding sleeve 503 guides the moving direction of the connecting ring 505 in cooperation with the storage tank 501 in the use process, to ensure the stability of the moving direction of the connecting ring 505 in the use process.

[0034] As shown in the figure, Figures 1 to 6 As shown, the working state of the layered fracturing retrievable packer is: when it is necessary to seal the borehole, first, the guide sleeve 2 and the central pipe 3 are connected with the oil pipe through the connecting sleeve 1, so that the guide sleeve 2 and the central pipe 3 can move with the oil pipe, to ensure that the sealing sleeve 402 can accurately seal the borehole at different depths, then the connecting ring 505 and the connecting rod 504 are moved by the driving sleeve 202, and the connecting rod 504 drives the control ring 502 to extrude the hydraulic oil inside the storage tank 501 into the inside of the sealing sleeve 402 in the moving process, so that the hydraulic oil pushes the sealing sleeve 402 to adhere to the borehole, to ensure the stability of the sealing sleeve 402 in the sealing process.

[0035] The utility model discloses a center tube 3, center tube 3 both ends are equipped with the connecting sleeve 1 and guide sleeve 2 respectively, and guide sleeve 2 is equipped with the drive sleeve 202 relative to the connecting sleeve 1 end, and drive sleeve 202 slides outside guide sleeve 2, and drive sleeve 202 is equipped with a plurality of guide holes 201 inside, the utility model discloses a separation mechanism sets up outside connecting sleeve 1 for the drilling hole is sealed, and the separation mechanism includes sealing element 4 and control part 5, sealing element 4 sets up outside center tube 3 for the drilling hole is sealed, and control part 5 sets up outside sealing element 4 for the control of sealing element 4, and sealing element 4 cooperates control part 5 and controls the drilling hole on-off, the utility model discloses the setting of sealing element 4 and control part 5 realizes through the cooperation of fixed tube 401, sealing sleeve 402, support ring 403, storage tank 501, control ring 502, connecting rod 504 and connecting ring 505, thereby adjusts the diameter of sealing sleeve 402 in the use process, makes sealing sleeve 402 can be fully matched with the drilling hole, avoids the irregular drilling hole sealing when, cylindrical rubber tube is difficult to fully match with the inner wall of drilling hole, leads to the gap between drilling hole and cylindrical rubber tube.

[0036] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only the principles of the utility model. The utility model can have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims

1. A layered fracturing retrievable packer characterized by, The utility model relates to a center tube, the both ends of center tube are equipped with connecting sleeve and guide sleeve respectively, the drive sleeve is equipped with in guide sleeve outside drive sleeve slides, the inside of drive sleeve is equipped with a plurality of guide hole, the utility model relates to a separation mechanism, sets up in connecting sleeve outside, is used for carrying out the sealing of drilling hole, the separation mechanism includes sealing piece and control piece, sealing piece sets up in center tube outside, is used for carrying out the sealing of drilling hole, control piece sets up in sealing piece outside, is used for controlling sealing piece, and sealing piece cooperates control piece and controls the on-off of drilling hole. The drive sleeve and the guide sleeve contact side are also provided with at least one sealing ring. The sealing piece includes a fixed tube, the fixed tube is sleeved outside the center tube, and one end of the fixed tube is provided with a blocking ring, and the blocking ring abuts against the connecting sleeve, a sealing sleeve is sleeved outside the fixed tube, and both ends of the sealing sleeve are connected with the fixed tube, a support ring is arranged in the sealing sleeve, the support ring is in a plurality, and the support ring is distributed in a straight line along the axial line of the fixed tube.

2. A layered fracturing retrievable packer according to claim 1, wherein, The control piece includes a storage tank, the inside of the storage tank is hollow, the storage tank is sleeved outside the center tube, and one end of the storage tank is connected with the fixed tube, a plurality of connecting holes are formed in the side of the storage tank relative to the fixed tube, a control ring is slidably connected in the storage tank, and the control ring is further provided with a connecting piece relative to the side of the guide sleeve.

3. A layered fracturing retrievable packer according to claim 1, wherein, The connecting piece includes a connecting rod, the connecting rod is in a plurality, the connecting rod slides in the storage tank, and the sliding direction of the connecting rod is parallel to the axial line of the center tube, one end of the connecting rod is connected with the control ring, and the other end of the connecting rod is provided with a connecting ring, and the connecting ring abuts against the drive sleeve.

4. A layered fracturing retrievable packer according to claim 3, wherein, The connecting ring is provided with a sliding sleeve relative to the side of the storage tank, and the sliding sleeve slides outside the storage tank, and the connecting rod is further sleeved with a spring outside.

5. A layered fracturing retrievable packer according to claim 4, wherein, ​ 6. A layered fracturing retrievable packer according to claim 5, wherein, ​

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