Novel variable-diameter anti-jamming orbital transfer packer

Abstract

The utility model belongs to the technical field of packers, and particularly relates to a novel variable-diameter drilling-jamming-prevention orbital transfer packer which comprises a center rod, a step shaft is arranged at the upper end of the center rod, a lower cone, a rubber sleeve and an upper cone are sequentially arranged at the upper end of the center rod in a sleeved mode, and the upper cone is connected with an upper protective sleeve through a first shear pin. And the lower cone is connected with a lower sheath through a second shear pin. The shearing force borne by the first shear pin and the second shear pin is larger and larger until the first shear pin and the second shear pin are sheared off by the shearing force, the upper protective sleeve and the lower protective sleeve fall off, and the equivalent diameter of the orbital transfer packer is reduced, so that the packer can pass through the reducing sleeve, the shear pins and the protective sleeves can be replaced when the packer is used again, maintenance is convenient, and construction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to packer technical field, concretely relates to a novel variable diameter anti-stuck drill variable track packer. BACKGROUND

[0002] The packer is connected to the downhole pipe string, and is used for sealing the annular space of the oil pipe and the casing or the open hole wall. The main function of the packer is to isolate the annular space above and below the packer, prevent the mixing of medium, protect the safe operation of the pipe system, and adjust the fluid pressure. At present, the oil and gas well layering fracturing, layering acidification, water injection and leakage finding operation all adopt the conventional packer under the oil pipe to operate. In the fracturing operation process, the casing is prone to deformation, and the packer is stuck, so that the packer cannot be smoothly taken out from the casing, and the construction efficiency is affected. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the utility model wants to solve the problem that the casing is prone to deformation, the packer is stuck, the packer cannot be smoothly taken out from the casing, and the construction efficiency is affected in the prior art.

[0004] Therefore, the utility model wants to solve the problem that the casing is prone to deformation, the packer is stuck, the packer cannot be smoothly taken out from the casing, and the construction efficiency is affected in the prior art.

[0005] Preferably, the center rod is provided with a slip seat below the lower cone, the lower end of the slip seat is provided with a limiting sleeve, the slip seat is provided with a slip above, the inner side of the slip is connected with the outer side of the slip seat through a spring, the slip is provided with a slip ring above, the slip ring is connected with the slip seat, the upper end of the slip is provided with a tooth, and the lower end of the slip is clamped in the limiting sleeve.

[0006] Preferably, the lower end of the limiting sleeve is threadedly connected with the upper end of the friction block body, the lower end of the friction block body is threadedly connected with a limiting cap, the friction block is arranged between the limiting sleeve and the limiting cap on the friction block body, an arc spring is arranged between the friction block and the friction block body, and limiting rings are arranged on the two sides of the friction block.

[0007] Preferably, a reversing ring is arranged on the inner wall of the lower end of the friction block body, a reversing pin is arranged on the reversing ring, long grooves and short grooves are arranged on the center rod in a staggered manner in the circumferential direction, the lower ends of the long grooves and the short grooves are communicated through a Y-shaped groove, and the reversing pin slides in the long grooves, the short grooves and the Y-shaped groove.

[0008] Preferably, the lower end of the center rod is threadedly connected with a lower joint.

[0009] Preferably, a hollow pipe is arranged in the center rod, and a cleaning port is arranged on the outer wall of the center rod.

[0010] The utility model discloses the following advantages of technical scheme have: the shear force that first shear nail and second shear nail bear is bigger and bigger, until first shear nail and second shear nail are sheared by shear force, upper sheath and lower sheath fall off, and the equivalent diameter of rail packer reduces, thereby make packer can pass through the casing of reducing diameter, and when using again, can replace shear nail and sheath, and it is convenient to maintain, improves construction efficiency.

[0011] Other features and advantages of the present application will be set forth in the following description of the application, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

[0012] The technical scheme of the utility model will be described in further detail below by means of the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and serve to explain the principles of the application, and are not intended to limit the application to the particular embodiments depicted in the drawings. In the drawings:

[0014] Fig. 1 It is the structural schematic diagram of the utility model;

[0015] Fig. 2 It is the half cut structure schematic diagram of the utility model;

[0016] Fig. 3 It is the center pole structure schematic diagram of the utility model;

[0017] Wherein, 1, center pole;2, stepped shaft;3, lower cone;4, rubber cylinder;5, upper cone;6, first shear nail;7, upper sheath;8, second shear nail;9, lower sheath;10, slip seat;11, limit sleeve;12, slip;13, spring;14, slip ring;15, card tooth;16, friction block body;17, spring;18, friction block;19, arc spring;20, limit ring;21, reversing ring;22, reversing pin;23, long groove;24, short groove;25, Y-shaped groove;26, lower joint;27, cleaning port. DETAILED DESCRIPTION

[0018] In order to make the technical problem, technical scheme and beneficial effect that the utility model wants to solve more clearly, the following combines the drawing and example, and this utility model is further detailedly explained.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0019] It is to be understood that when a part is referred to as being "on" or "connected to" another part, it can be directly on or connected to the other part or indirectly on or connected to the other part by intervening parts. When a part is referred to as being "connected to" another part, it can be directly or indirectly connected to the other part.

[0020] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate directions or positions based on the directions or positions shown in the drawings, and are used for convenience of description and simplification of description only, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0021] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0022] The utility model provides a novel variable diameter anti-stuck drill variable track packer, as shown in the figure, including: center rod 1, the upper end of center rod 1 is provided with step shaft 2, lower cone 3, rubber tube 4 and upper cone 5 are successively sleeved on the upper end of center rod 1, and upper cone 5 is connected with upper sheath 7 through first shear pin 6, and lower cone 3 is connected with lower sheath 9 through second shear pin 8. Figs. 1-3 The utility model discloses a novel variable diameter anti-stuck drill variable track packer, as shown in the figure, including: center rod 1, the upper end of center rod 1 is provided with step shaft 2, lower cone 3, rubber tube 4 and upper cone 5 are successively sleeved on the upper end of center rod 1, and upper cone 5 is connected with upper sheath 7 through first shear pin 6, and lower cone 3 is connected with lower sheath 9 through second shear pin 8.

[0023] The working principle and technical effect of the above technical scheme: the position of the maximum radial dimension of the variable track packer is at the upper cone 5 and the lower cone 3, when the casing is deformed, if the casing deformation part is stuck and the upper cone 5 and the lower cone 3 part cannot pass, with the continuous lifting of the variable track packer, the shear force borne by the first shear pin 6 and the second shear pin 8 is more and more big, until the first shear pin 6 and the second shear pin 8 are cut by the shear force, the upper sheath 7 and the lower sheath 9 fall off, the equivalent diameter of the variable track packer reduces, so that the packer can pass through the reduced casing, and when using again, the shear pin and the sheath can be replaced, convenient maintenance, improve the construction efficiency.

[0024] In one embodiment, the center rod 1 is sleeved with a slip seat 10 below the lower cone 3, the lower end of the slip seat 10 is provided with a limiting sleeve 11, the slip seat 10 is sleeved with a slip 12, the inner side of the slip 12 is connected with the outer side of the slip seat 10 through a spring 13, the slip 12 is sleeved with a slip ring 14, the slip ring 14 is connected with the slip seat 10, the upper end of the slip 12 is provided with a slip tooth 15, the slip tooth 15 can better adhere to the inner wall of the sleeve, and is fixed more firmly, and the lower end of the slip 12 is clamped in the limiting sleeve 11. The lower end of the limiting sleeve 11 is threadedly connected with the upper end of a friction block body 16, the lower end of the friction block body 16 is threadedly connected with a limiting cap 17, the friction block body 16 is provided with a friction block 18 between the limiting sleeve 11 and the limiting cap 17, an arc spring 19 is arranged between the friction block 18 and the friction block body 16, and limiting rings 20 are arranged on the two sides of the friction block 18. A reversing ring 21 is arranged on the inner wall of the lower end of the friction block body 16, a reversing pin 22 is arranged on the reversing ring 21, long grooves 23 and short grooves 24 are arranged on the center rod 1 in a staggered manner in the circumferential direction, the lower ends of the long grooves 23 and the short grooves 24 are communicated through a Y-shaped groove 25, and the reversing pin 22 slides in the long grooves 23, the short grooves 24 and the Y-shaped groove 25. The slip seat 10, the limiting sleeve 11, the slip 12, the spring 13, the slip ring 14, the slip tooth 15, the friction block body 16, the limiting cap 17, the friction block 18, the arc spring 19, the limiting rings 20, the reversing ring 21 and the reversing pin 22 form an integral whole and can move relative to the center rod 1. The lower end of the center rod 1 is threadedly connected with a lower joint 26, facilitating connection with other components. The center rod 1 is provided with a hollow pipe, and a cleaning port 27 is arranged on the outer wall of the center rod 1. After construction is completed, sand will be left in the tool, and water will flow out from the cleaning port 628 through the hollow passage to carry away the sand, playing a cleaning role.

[0025] The working principle and beneficial technical effects of the above technical scheme are as follows: in the process of moving downward, the friction block 18 is stretched out and retracted outward to generate friction with the inner wall of the casing through the elastic force provided by the arc spring 19, but can move downward along the casing, when the position needing construction and plugging is reached, the center rod 1 is lifted and then lowered, the reversing pin 22 slides along the short groove 24, Y-shaped groove 25 and long groove 23, so that the reversing pin 22 slides from the short groove 24 into the long groove 23, the center rod 1 can move more displacement downward relative to the slip 12, so that the lower cone 3 is inserted into the slip 12, the slip 12 rotates around the slip ring 14, the slip 12 is expanded, the radius of the slip 12 increases, the pawl 15 on the slip 12 is clamped on the inner wall of the casing, the plugging is completed, at the same time, the upper cone 5 is pressed downward and moves downward along the center rod 1, the rubber cylinder 4 is pressed and the diameter increases to fit the inner wall of the casing, further plugging and improving the sealing performance are achieved. When the plugging needs to be released, the center rod 1 is lifted, the rubber cylinder 4 is restored, the spring 13 makes the slip 12 retract, the plugging can be released, and then the center rod 1 is moved downward, the reversing pin 22 is switched from the long groove 23 to the short groove 24, the lower cone 3 cannot be inserted into the slip 12, the pawl 15 of the slip 12 cannot be clamped with the inner wall of the casing, and the pipe string can continue to move, the plugging or releasing is fast, the construction is convenient, and the efficiency is high.

[0026] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Therefore, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A new variable diameter anti-stuck drill variable track packer, characterized in that, The utility model relates to a center rod (1) is provided with stepped shaft (2) on the upper end, and the lower cone (3), rubber tube (4) and upper cone (5) are successively sleeved on the upper end of center rod (1), and the upper cone (5) is connected with upper sheath (7) through first shear nail (6) on it, and the lower cone (3) is connected with lower sheath (9) through second shear nail (8) on it. The center rod (1) is provided with slip seat (10) below the lower cone (3), and the lower end of slip seat (10) is provided with limiting sleeve (11), and the slip seat (10) is provided with slipper (12) on it, and the inner side of slipper (12) is connected with the outer side of slip seat (10) through spring (13), and the slipper (12) is provided with slipper ring (14) on it, and the slipper ring (14) is connected with slip seat (10), and the upper end of slipper (12) is provided with catch tooth (15), and the lower end of slipper (12) is clamped in limiting sleeve (11).

2. A new variable diameter anti-stuck drill variable track packer according to claim 1, characterized in that, The lower end of limiting sleeve (11) is screwed with the upper end of friction block body (16), the lower end of friction block body (16) is screwed with limiting cap (17), the friction block body (16) is provided with friction block (18) between limiting sleeve (11) and limiting cap (17) on it, the friction block (18) and friction block body (16) are provided with arc spring (19) between them, and the both sides of friction block (18) are provided with limiting ring (20).

3. The variable diameter anti-kicking variable track packer of claim 2, wherein, The inner wall on the lower end of friction block body (16) is provided with reversing ring (21), the reversing ring (21) is provided with reversing pin (22), the center rod (1) is provided with long groove (23) and short groove (24) along the circumference staggered, the lower end of long groove (23) and short groove (24) is communicated through Y-shaped groove (25), and the reversing pin (22) slides in long groove (23), short groove (24) and Y-shaped groove (25).

4. The variable diameter anti-kicking variable track packer of claim 3, wherein, The lower end of center rod (1) is screwed with lower joint (26).

5. The variable diameter anti-kicking variable track packer of claim 1, wherein, The center rod (1) is provided with hollow pipeline, and the outer wall of center rod (1) is provided with cleaning port (27).

6. The variable diameter anti-kicking variable-rail packer of claim 1, wherein, ​

Images