Packer for well repair

Abstract

The utility model relates to the technical field of maintenance equipment, in particular to a packer for well repair. The packer for well repair comprises a supporting ring, and a plugging assembly for sealing an oil well is arranged on the supporting ring. The plugging assembly comprises a plugging barrel, the plugging barrel is arranged on the supporting ring, a rubber barrel of a conical structure is arranged in the plugging barrel in a sleeved mode, and a fixed semi-ring is arranged at the top end of the plugging barrel. According to the packer for well repair, the plugging barrel in the plugging assembly is prepared to be installed outside a well mouth in advance, the rotation of the rotating rod can be directly controlled in the later period to drive the sealing disc to rotate towards the plugging barrel till the outer wall of the sealing disc abuts against the fixed semi-ring on the plugging barrel, and then plugging operation can be completed; the whole installation process is more flexible and rapid, and therefore potential safety hazards caused by untimely installation can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of repair equipment, in particular to a packer for well repair. Background Art

[0002] With the widespread application of horizontal well technology, horizontal wells have become an important means of efficiently developing oil fields. During use, when a horizontal well fails, a plugging device at the wellhead is needed to plug the horizontal well to prevent overflow, well kick, or even blowout from occurring at any time.

[0003] When an existing horizontal wellhead needs maintenance, the sealing device is usually temporarily removed to install the sealing operation. Since there are many steps in connecting the sealing device to the wellhead and the operation is relatively complicated, the temporary installation increases the installation time of the sealing device, thereby increasing the safety hazards caused by untimely maintenance and sealing.

[0004] Therefore, it is necessary to provide a new well repairing packer to solve the above-mentioned technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a packer for well repair.

[0006] The utility model provides a packer for well repair, comprising: a support ring, on which a plugging assembly for sealing the oil well is provided;

[0007] The plugging assembly comprises a plugging cylinder, which is arranged on a supporting ring, a rubber cylinder with a conical structure is sleeved inside the plugging cylinder, and a fixing half ring is arranged at the top of the plugging cylinder;

[0008] The plugging assembly also includes a mounting shell, a rotating rod rotatably connected and horizontally distributed is inserted into one side of the mounting shell, a supporting rod rotatably connected and vertically distributed is provided at the inner bottom of the mounting shell, a worm is fixedly sleeved on the outer wall of the rotating rod, a worm wheel is fixedly sleeved on the outer side of the supporting rod, and the worm wheel and the worm are meshingly connected;

[0009] The top end of the support rod extends to the outside of the mounting shell and is provided with a sealing disk matched with the fixed half ring, and one end of the rotating rod extends to the outside of the mounting shell and is provided with a rotating disk.

[0010] Preferably, a fixedly connected support cylinder is provided at the bottom of the support ring, a threadedly connected rotating cylinder is sleeved on the outside of the support cylinder, an adapter frame is provided inside the rotating cylinder, and an extrusion ring is provided on the top of the adapter frame.

[0011] Preferably, the support tube is provided with a plurality of groups of movably connected extrusion sheets inside, and a fixedly connected extrusion block is provided at the bottom of the extrusion sheet. The position of the extrusion block is opposite to that of the extrusion sheet, and the opposite sides of the extrusion sheet and the extrusion block are both slope structures.

[0012] Preferably, a fixedly connected docking piece is provided inside the support tube at a position opposite to the extrusion piece, a telescopic rod is arranged between the docking piece and the extrusion piece, one end of the telescopic rod is fixedly connected to the outer wall of the docking piece, and the other end of the telescopic rod is fixedly connected to the outer wall of the extrusion piece.

[0013] Preferably, a spring is sleeved on the outside of the telescopic rod, one end of the spring is fixedly connected to the outer wall of the docking piece, and the other end of the spring is fixedly connected to the outer wall of the extrusion piece.

[0014] Preferably, a plurality of evenly distributed protrusions are provided on a side wall of the extrusion sheet close to the center of the support ring.

[0015] Compared with the related art, the well repair packer provided by the utility model has the following beneficial effects:

[0016] 1. The utility model prepares and installs the sealing cylinder in the sealing assembly outside the wellhead in advance, and later can directly drive the sealing disk to rotate toward the sealing cylinder by controlling the rotation of the rotating rod until the outer wall of the sealing disk abuts against the fixed half ring on the sealing cylinder, thereby completing the sealing operation. The entire installation process is more flexible and quick, thereby reducing the safety hazards caused by untimely installation.

[0017] 2. The utility model adopts worm gear transmission, and after the sealing disc is installed, the sealing disc can be fixed by the self-locking of the worm gear, thereby making the operation of the staff more convenient.

[0018] 3. The utility model drives the extrusion sheet by adopting an annular extrusion method, and then when the sealing component is installed, the multiple extrusion sheets are driven synchronously, so that the outer walls of the multiple extrusion sheets can be synchronously abutted against the outer wall of the wellhead, and the center of the support ring and the sealing cylinder can be placed on the same vertical line as the center of the oil well, so that the rubber cylinder in the sealing cylinder can abut against the end of the wellhead more evenly, thereby improving the sealing effect of the connection between the sealing cylinder and the wellhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A structural schematic diagram of a preferred embodiment of a packer for well repairing is provided for the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of a partial cross-sectional structure of the connection between the support ring and the plugging assembly shown;

[0021] Figure 3 for Figure 1 A schematic diagram of a partial cross-sectional structure of the connection between the support cylinder, the rotating cylinder and the extrusion sheet shown;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure of the extruded sheet and its components shown;

[0023] Figure 5 for Figure 3 A schematic structural diagram of the cross section of the connection between the support cylinder and the rotating cylinder is shown.

[0024] Numbers in the figure: 1. Support ring; 2. Sealing assembly; 21. Sealing cylinder; 211. Rubber cylinder; 212. Fixed half ring; 22. Sealing disk; 23. Mounting shell; 231. Rotating rod; 232. Worm; 233. Worm wheel; 24. Support rod; 3. Support cylinder; 31. Docking piece; 4. Rotating cylinder; 41. Adapter frame; 42. Extrusion ring; 5. Extrusion piece; 51. Telescopic rod; 52. Spring; 53. Extrusion block. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0027] See also Figures 1 to 5 The embodiment of the utility model provides a packer for well repair, which includes a support ring 1, on which a plugging component 2 for sealing the oil well is provided.

[0028] In the embodiments of the present invention, please refer to Figures 1 to 5 The sealing component 2 includes a sealing cylinder 21, which is arranged on the supporting ring 1. A rubber cylinder 211 with a conical structure is sleeved inside the sealing cylinder 21, and a fixed half ring 212 is provided at the top of the sealing cylinder 21; the sealing component 2 also includes a mounting shell 23, a rotating rod 231 which is rotatably connected and horizontally distributed is inserted on one side of the mounting shell 23, and a supporting rod 24 which is rotatably connected and vertically distributed is provided at the inner bottom of the mounting shell 23. A worm 232 is sleeved on the outer wall of the rotating rod 231, and a worm wheel 233 which is fixedly connected is sleeved on the outer side of the supporting rod 24, and the worm wheel 233 and the worm 232 are meshingly connected; the top end of the supporting rod 24 extends to the outside of the mounting shell 23 and is provided with a sealing disk 22 which is compatible with the fixed half ring 212, and one end of the rotating rod 231 extends to the outside of the mounting shell 23 and is provided with a rotating disk.

[0029] It should be noted that: when using the present device, the sealing tube 21 in the sealing assembly 2 can be pre-installed outside the wellhead in advance, and then in the later use process, when the device is damaged and the wellhead needs to be sealed, the rotating rod 231 can be directly controlled to drive the worm 232 to rotate, and the rotating worm 232 can drive the support rod 24 to rotate by meshing with the external worm gear 233, so that the support rod 24 can drive the external sealing disk 22 to move in the direction close to the fixed semi-ring 212, until the outside of the sealing disk 22 and the outer wall of the fixed semi-ring 212 are aligned, and the sealing operation of the sealing tube 21 is completed;

[0030] The entire installation process is more flexible and quick, thereby reducing the potential safety hazards caused by untimely installation. By adopting the worm gear 233 and worm 232 for transmission, after the installation of the sealing disk 22 is completed, the sealing disk 22 can be fixed by the self-locking of the worm gear 233 and worm 232, which makes the operation of the staff more convenient.

[0031] In the embodiments of the present invention, please refer to Figures 1 to 5 A fixedly connected support cylinder 3 is provided at the bottom of the support ring 1, a threaded rotating cylinder 4 is sleeved on the outside of the support cylinder 3, an adapter frame 41 is provided inside the rotating cylinder 4, and an extrusion ring 42 is provided on the top of the adapter frame 41, a plurality of groups of movably connected extrusion sheets 5 are provided inside the support cylinder 3, a fixedly connected extrusion block 53 is provided at the bottom of the extrusion sheet 5, the position of the extrusion block 53 is opposite to the position of the extrusion sheet 5, and the opposite back surfaces of the extrusion sheet 5 and the extrusion block 53 are both slope structures, a fixedly connected docking sheet 31 is provided at the opposite part of the support cylinder 3 to the extrusion sheet 5, a telescopic rod 51 is arranged between the docking sheet 31 and the extrusion sheet 5, one end of the telescopic rod 51 is fixedly connected to the outer wall of the docking sheet 31, and the other end of the telescopic rod 51 is fixedly connected to the outer wall of the extrusion sheet 5, a spring 52 is sleeved on the outside of the telescopic rod 51, one end of the spring 52 is fixedly connected to the outer wall of the docking sheet 31, and the other end of the spring 52 is fixedly connected to the outer wall of the extrusion sheet 5.

[0032] It should be noted that: by setting the spring 52, in the initial state, the plurality of springs 52 can support the corresponding extrusion sheets 5 by their own force, so that the plurality of extrusion sheets 5 can be on the same annular track in the initial state. Therefore, when the extrusion ring 42 moves upward, the extrusion ring 42 can realize synchronous extrusion driving of the extrusion blocks 53 at the bottom of the plurality of extrusion sheets 5.

[0033] During the process of the two abutting against each other, the telescopic rod 51 can limit the vertical abutment of the extrusion sheet 5, thereby preventing the extrusion sheet 5 from moving in the vertical direction. When the extrusion block 53 and the extrusion ring 42 abut against each other, the driving force transformed by the slope structure can stably mobilize the extrusion ring 42 to move toward the center of the support ring 1, so that several extrusion sheets 5 can abut against the outer wall of the wellhead at the same time.

[0034] In the embodiments of the present invention, please refer to Figures 1 to 5 A plurality of evenly distributed protrusions are provided on one side wall of the extrusion sheet 5 close to the center of the support ring 1 .

[0035] It should be noted that: by setting the convex points, when the extrusion sheet 5 abuts against the outer wall of the oil well, the convex points can increase the friction between the extrusion sheet 5 and the outer wall of the oil well, thereby improving the stability of the installation of the support ring 1.

[0036] The working principle of the well repair packer provided by the utility model is as follows;

[0037] When using the device, the staff can first sleeve the support ring 1 outside the wellhead, and make the inner wall of the rubber tube 211 in the plugging tube 21 abut against the end of the wellhead, and then control the rotating tube 4 to rotate on the outer wall of the support tube 3 through the turntable, and the rotating tube 4 can move through the threaded structure;

[0038] During the movement of the rotating cylinder 4, the extrusion block 53 can be driven to move synchronously through the adapter frame 41. When the outer wall of the extrusion ring 42 abuts against the outer wall of the upper extrusion block 53, since the extrusion ring 42 and the extrusion block 53 are both slope structures, the slope structure can convert the extrusion block 53 in the vertical direction of the extrusion ring 42 into a water-driven force on the extrusion sheet 5, thereby allowing multiple extrusion sheets 5 to move toward the center of the support ring 1 at the same time. When the synchronously moving extrusion sheets 5 abut against the outer wall of the wellhead, the position of the support ring 1 can be adjusted, so that the centers of the support ring 1 and the support cylinder 3 are on the same vertical line as the center of the wellhead, so that the rubber cylinder 211 in the sealing cylinder 21 can abut against the end of the wellhead more evenly, thereby improving the sealing effect of the connection between the sealing cylinder 21 and the wellhead.

[0039] At this point, the pre-installation of the sealing cylinder 21 can be completed. During later use, when the oil well fails and needs to be repaired, the rotating rod 231 can be directly controlled to drive the worm 232 to rotate. At this time, the rotating worm 232 can drive the support rod 24 to rotate by engaging with the external worm gear 233, so that the support rod 24 can drive the external sealing disk 22 to move toward the direction close to the fixed half ring 212 until the outside of the sealing disk 22 is against the outer wall of the fixed half ring 212, thereby completing the sealing of the sealing cylinder 21, thereby achieving the sealing of the oil well below. The entire sealing process is more convenient and quick, and can reduce the overflow, well gushing and blowout caused by the untimely installation of the sealing structure.

[0040] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0041] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A packer for well repair, It is characterized in that include: A support ring (1), wherein the support ring (1) is provided with a sealing component (2) for sealing the oil well; The plugging assembly (2) comprises a plugging cylinder (21), wherein the plugging cylinder (21) is arranged on the support ring (1), a rubber cylinder (211) with a conical structure is sleeved inside the plugging cylinder (21), and a fixing half ring (212) is arranged at the top end of the plugging cylinder (21); The plugging assembly (2) further comprises a mounting shell (23), a rotating rod (231) which is rotatably connected and horizontally distributed is inserted into one side of the interior of the mounting shell (23), a supporting rod (24) which is rotatably connected and vertically distributed is provided at the inner bottom of the mounting shell (23), a worm (232) which is fixedly connected is sleeved on the outer wall of the rotating rod (231), a worm wheel (233) which is fixedly connected is sleeved on the outer side of the supporting rod (24), and the worm wheel (233) and the worm wheel (232) are meshingly connected; The top end of the support rod (24) extends to the outside of the mounting shell (23) and is provided with a sealing disk (22) matched with the fixed half ring (212), and one end of the rotating rod (231) extends to the outside of the mounting shell (23) and is provided with a rotating disk.

2. The well repair packer according to claim 1, It is characterized in that A fixedly connected support cylinder (3) is provided at the bottom of the support ring (1); a threadedly connected rotating cylinder (4) is sleeved on the outside of the support cylinder (3); an adapter frame (41) is provided inside the rotating cylinder (4); and an extrusion ring (42) is provided on the top of the adapter frame (41).

3. The well repair packer according to claim 2, It is characterized in that A plurality of groups of movably connected extrusion sheets (5) are provided inside the support tube (3), and a fixedly connected extrusion block (53) is provided at the bottom of the extrusion sheet (5), the position of the extrusion block (53) is opposite to that of the extrusion sheet (5), and the opposite sides of the extrusion sheet (5) and the extrusion block (53) are both slope structures.

4. The well repair packer according to claim 3, It is characterized in that A fixedly connected docking piece (31) is provided at a position opposite to the extrusion piece (5) inside the support tube (3), a telescopic rod (51) is arranged between the docking piece (31) and the extrusion piece (5), one end of the telescopic rod (51) is fixedly connected to the outer wall of the docking piece (31), and the other end of the telescopic rod (51) is fixedly connected to the outer wall of the extrusion piece (5).

5. The well repair packer according to claim 4, It is characterized in that A spring (52) is sleeved on the outside of the telescopic rod (51), one end of the spring (52) is fixedly connected to the outer wall of the docking piece (31), and the other end of the spring (52) is fixedly connected to the outer wall of the extrusion piece (5).

6. The well repair packer according to claim 5, It is characterized in that A plurality of evenly distributed protrusions are provided on a side wall of the extrusion sheet (5) close to the center of the support ring (1).

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