Valve replacing tool without releasing under pressure

Abstract

The utility model relates to the technical field of valve replacement equipment, and particularly discloses an under-pressure non-releasing valve replacement tool which comprises a first rod piece, a second rod piece and a third rod piece. The blanking plug body is made of an elastic material, is cylindrical and is detachably arranged at one end of the first rod piece; the expansion part is made of an elastic material and located on the side, away from the first rod piece, of the blanking plug body; the second rod piece is arranged in the first rod piece in a sliding mode, and one end of the second rod piece penetrates through the blanking plug body and is detachably connected with the expansion component; the driving assembly is used for driving the second rod piece to move in the axial direction, so that the second rod piece is driven to pull the expansion part to enter the blanking plug body, and the blanking plug body is driven to expand in the radial direction; the plug seat is used for pressing the plug body; according to the well hole plugging device, the plugging device body can expand in the radial direction, the plugging effectiveness of the plugging device body on a well hole is improved, and pressure in the well hole is prevented from leaking outwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve replacement equipment, especially to a pressure-bearing non-hand-loss valve replacement tool. BACKGROUND

[0002] In oil and gas well exploitation operation, with the increase of valve use time, the valve will inevitably age, and even fail to cause leakage, at which time the valve needs to be replaced in time.

[0003] For example, a non-hand-loss gate valve replacement device is disclosed in Chinese patent CN203050581U, which comprises a plug, a feeding mechanism, a plug fixing device, and a taking and installing mechanism.

[0004] The plug is sent into the tubing head to block the plug seat in the tubing head, thereby blocking the overflow of the bottomhole gas flow. The plug comprises a plug body and a connecting rod connected to the plug body, and the connecting rod is used for detachable connection with the feeding rod. The cross section of the plug body is larger than that of the connecting rod, so that a stepped structure is formed at the connecting part of the plug body and the connecting rod.

[0005] In the above technical solution, the plug is directly sent into the tubing head to complete plugging, but the plug body is not radially expanded, which cannot guarantee that the plug body can adhere to the inner wall surface of the tubing head and cannot guarantee that the plug can effectively plug the tubing head. UTILITY MODEL CONTENTS

[0006] In view of the above problems, the utility model provides a pressure-bearing non-hand-loss valve replacement tool, which aims to improve the effectiveness and stability of wellbore plugging.

[0007] To achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a pressure-bearing non-hand-loss valve replacement tool, which comprises a first rod piece, an inside hollow; a plug body made of elastic material, in the shape of a cylinder, and detachably arranged at one end of the first rod piece; an expansion component made of elastic material, arranged at the side of the plug body away from the first rod piece; a second rod piece slidably arranged in the first rod piece, one end of the second rod piece passing through the plug body to detachably connect the expansion component; a driving assembly for driving the second rod piece to move axially, thereby driving the second rod piece to pull the expansion component into the plug body, so as to drive the plug body to expand radially; and a plug seat for pressing the plug body.

[0009] Further, the driving assembly comprises: a cylinder arranged at one end of the first rod away from the plug body; a piston slidably arranged in the cylinder, and the piston is detachably connected to one end of the second rod away from the expansion component; and a high-pressure source capable of injecting high-pressure medium into the cylinder to push the piston to slide in the cylinder.

[0010] Further, the driving assembly further comprises: a spring, one end of the spring abutting against the cylinder, and the other end of the spring abutting against the piston, for driving the piston to reset.

[0011] Further, the tool further comprises: a medium channel arranged in the piston, for conveying the high-pressure medium; and a pressure relief valve arranged at one end of the medium channel and communicating with the high-pressure source.

[0012] Further, the tool further comprises: a first step surface arranged at one end of the plug body, and a second step surface arranged at one end of the expansion component; and the first step surface is capable of being embedded into the second step surface.

[0013] Further, one end of the expansion component away from the second step surface is conical.

[0014] Further, the tool further comprises: a connector, one end of the connector fixedly connected to the plug body, and the other end of the connector detachably connected to the first rod; and a scale line is arranged on the outer wall surface of the connector; and a connecting rod, one end of the connecting rod fixedly connected to the expansion component, and the other end of the connecting rod detachably connected to the second rod.

[0015] Further, the tool further comprises: a first support fixedly installed; a first telescopic component, the main body of the first telescopic component fixedly arranged on the first support; a second support fixedly installed on the piston rod of the first telescopic component, and the first rod arranged on the second support; and a second telescopic component, the main body of the second telescopic component fixedly arranged on the second support, and the piston rod of the second telescopic component detachably connected to the valve.

[0016] Further, the tool further comprises: a blowout preventer box, the blowout preventer box detachably arranged on the valve, the piston rod of the second telescopic component detachably connected to the blowout preventer box, the first rod passing through the blowout preventer box, and the inner wall surface of the blowout preventer box and the outer wall surface of the first rod movably and sealingly connected.

[0017] Further, the plug seat is a crescent flange, and a centralizer is further arranged on the plug seat.

[0018] The tool has the following beneficial effects: under the action of the driving assembly, the second rod can pull the expansion component into the plug body, so that the plug body is expanded along the radial direction, the plug body is filled with the inner wall surface of the well hole, the effectiveness of the plug body in plugging the well hole is improved, and the pressure in the well hole is prevented from being discharged outside.

[0019] The plug body sending and taking operation and the valve hoisting operation can be completed by the first telescopic component and the second telescopic component, so that the manual labor of workers can be effectively reduced, and the work efficiency of valve replacement can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The overall structure schematic diagram of the valve replacement tool is provided.

[0021] Figure 2 The overall structure schematic diagram of the valve replacement tool is provided. Figure 1 The enlarged schematic diagram of A of the valve replacement tool is provided.

[0022] Figure 3 The enlarged schematic diagram of B of the valve replacement tool is provided. Figure 1 The enlarged schematic diagram of B of the valve replacement tool is provided.

[0023] In the valve replacement tool, 11 is a first rod member, 12 is a second rod member, 21 is a plug body, 22 is an expansion component, 23 is a connecting head, 24 is a connecting rod, 3 is a plug seat, 41 is a cylinder body, 42 is a piston, 43 is a spring, 44 is a medium channel, 45 is a pressure relief valve, 51 is a first support, 52 is a second support, 61 is a first telescopic component, 62 is a second telescopic component, and 7 is a blowout preventer box. DETAILED DESCRIPTION

[0024] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings of the specification and specific embodiments.

[0025] Embodiment 1

[0026] Referring to Figure 1 , Figure 2 and Figure 3 , the embodiment of the present application discloses a valve replacement tool with pressure and non-lost hand, which comprises: a first rod member 11, which is hollow inside; a plug body 21, which is made of elastic material and is in the shape of a cylinder, and is detachably arranged at one end of the first rod member 11; an expansion component 22, which is made of elastic material and is located on the side of the plug body 21 away from the first rod member 11; a second rod member 12, which is slidably arranged in the first rod member 11, and one end of the second rod member 12 passes through the plug body 21 to detachably connect the expansion component 22; a driving assembly, which is used to drive the second rod member 12 to move in the axial direction, so as to pull the expansion component 22 into the plug body 21, thereby driving the plug body 21 to expand in the radial direction; and a plug seat 3, which is used to press the plug body 21.

[0027] In specific use, the first rod member 11, the second rod member 12 and the plug body 21 are first sent into the well hole to be plugged through the valve to be replaced, the plug body reaches the designated position, and then the driving assembly is started to drive the second rod member 12 to move in the axial direction away from the well hole.

[0028] Under the action of the driving assembly, the second rod 12 can pull the expansion component 22 into the plugger body 21, so as to expand the plugger body 21 radially, fill the plugger body 21 with the inner wall surface of the well hole, complete the plugging operation of the well hole, and prevent the pressure in the well hole from leaking out.

[0029] Then, the valve to be replaced is pulled along the axial direction of the first rod 11 by a fixed distance to provide installation space for the plugging seat 3; the plugging seat 3 is installed on one side of the well hole, the plugger body 21 is pressed and fitted in the well hole through the plugging seat 3 to prevent the plugger body 21 from popping out; the first rod 11, the second rod 12 and the valve to be replaced are removed; after replacing the new valve, the first rod 11 and the second rod 12 need to be reconnected with the plugger body and the expansion component 22 respectively, the plugging seat 3 is removed, and the new valve is installed and removed from the plugger body.

[0030] Specifically, the driving assembly comprises: a cylinder 41 arranged at one end of the first rod 11 away from the plugger body 21; a piston 42 slidably arranged in the cylinder 41, and the piston 42 is detachably connected to one end of the second rod 12 away from the expansion component 22; and a high-pressure source capable of injecting high-pressure medium into the cylinder 41 to push the piston 42 to slide in the cylinder 41.

[0031] Preferably, the high-pressure medium is hydraulic oil, and the high-pressure source is a hydraulic pump. The hydraulic pump works on the hydraulic oil through mechanical movement (such as rotation or reciprocating movement of gears, vanes or plungers) to deliver the hydraulic oil into the cylinder 41, thereby pushing the piston 42 to slide in the cylinder 41 and achieving the purpose of pulling the second rod 12.

[0032] It is worth mentioning that the high-pressure medium can also be air, and the high-pressure source can also be an air pump.

[0033] It is worth mentioning that the plugger body and the expansion component 22 can both be made of nitrile rubber.

[0034] It can be understood that a sealing ring should be added between the piston 42 and the inner wall surface of the cylinder 41 to prevent leakage of the high-pressure medium; the sliding seal is a well-known technology in the art, and will not be described here.

[0035] Preferably, the driving assembly further comprises a spring 43, one end of the spring 43 abutting the cylinder 41, and the other end of the spring 43 abutting the piston 42, for driving the piston 42 to reset; the piston 42 can press the spring 43 during the process of the high-pressure medium pushing the piston 42 to slide in the cylinder 41; after the high-pressure source fails, the spring 43 can push the piston 42 to slide and reset under the action of the spring 43 recovering deformation.

[0036] It is worth mentioning that the tool also includes a medium channel 44 opened in the piston 42 for conveying high-pressure medium, and a pressure relief valve 45 arranged at one end of the medium channel 44 and connected to a high-pressure source.

[0037] Preferably, the pressure relief valve 45 is a pipeline stop pressure relief valve 45 available on the market, which can prevent the damage of the device caused by the excessive pressure in the barrel 41; the pipeline stop pressure relief valve 45 also has a check function, which can prevent the backflow of high-pressure medium and ensure the one-way flow of high-pressure medium.

[0038] Preferably, the tool also includes a first step surface and a second step surface, the first step surface is arranged at one end of the plug body 21, and the second step surface is arranged at one end of the expansion component 22; the first step surface can be embedded into the second step surface.

[0039] By arranging the first step surface and the second step surface, the first step surface can be sleeved in the second step surface, so that the plug body 21 and the expansion component 22 can be pre-positioned and installed.

[0040] Preferably, the end of the expansion component 22 away from the second step surface is conical, by arranging the end of the expansion component 22 as conical, on the one hand, the conical expansion component 22 can play a guiding role in the process of sending the plug body 21 into the well hole; on the other hand, it is convenient for the expansion component 22 to be axially extruded and deformed, and it is convenient for the expansion component 22 to enter the plug body 21 in the process of pulling the second rod 12.

[0041] Specifically, the tool also includes a connector 23, one end of which is fixedly connected to the plug body 21, and the other end of which is detachably connected to the first rod 11; and a scale line is arranged on the outer wall surface of the connector 23, so as to visualize the depth of the plug body 21 entering the well hole; a connecting rod 24, one end of which is fixedly connected to the expansion component 22, and the other end of which is detachably connected to the second rod 12.

[0042] It is worth mentioning that the connector 23 and the first rod 11 are connected by threads, and the connecting rod 24 and the second rod 12 are also connected by threads.

[0043] Preferably, the plug seat 3 is a crescent flange, a through slot is arranged on the crescent flange along the radial direction of the first rod 11 for the first rod 11 to pass through; in addition, a centralizer is arranged on the plug seat 3, which guides the disassembly and assembly of the first rod 11.

[0044] It is worth mentioning that the valve can be detachably installed on one side of the well hole by bolts, and the plug seat 3 can also be detachably installed on one side of the well hole by bolts.

[0045] Example 2

[0046] Referring toFigure 1 As shown in the embodiment, the tool further comprises: a first support 51 fixedly installed; a first telescopic component 61, a main body of the first telescopic component 61 being fixedly arranged on the first support 51; a second support 52 fixedly installed on a piston rod of the first telescopic component 61, the first rod member 11 being arranged on the second support 52; and a second telescopic component 62, a main body of the second telescopic component 62 being fixedly arranged on the second support 52, a piston rod of the second telescopic component 62 being detachably connected with the valve.

[0047] It is worth mentioning that the first support 51 can be directly fixedly installed on the ground by expansion bolts, and can also be fixedly connected with other equipment in the mining site by bolts; in the embodiment, the first support 51 is directly fixedly installed on other valves that do not need to be replaced by bolts.

[0048] In the embodiment, the main body of the first telescopic component 61 is fixedly installed on the first support 51, a threaded rod is connected with the end of the piston rod of the first telescopic component 61 by a nut, the second support 52 is arranged in the threaded rod, a limiting nut is arranged on the threaded rod away from the body of the plugging device, for limiting the sliding of the second support 52; in addition, the main body of the second telescopic component 62 is installed on the second support 52 by screws.

[0049] In specific use, when the plugging device body 21 needs to be sent into the well hole, the piston rod of the first telescopic component 61 is subjected to telescopic movement, so as to drive the second support 52 to move towards the direction close to the well hole, until the plugging device body 21 is sent into the well hole; when the valve needs to be pulled along the axial direction of the first rod member 11, the piston rod of the second telescopic component 62 is subjected to telescopic movement, so as to pull the valve.

[0050] It can be known that when the plugging device body 21 needs to be taken out of the well hole, the piston rod of the first telescopic component 61 is subjected to telescopic movement, so as to take out the plugging device body 21; the piston rod of the second telescopic component 62 is subjected to telescopic movement, so as to push the new valve towards the well hole.

[0051] In the embodiment, the first telescopic component 61 and the second telescopic component 62 can complete the sending and taking work of the plugging device body 21 and the hoisting work of the valve, so as to effectively reduce the manual labor of the workers and improve the work efficiency of the valve replacement.

[0052] It is worth mentioning that the first rod member 11 is clamped on the second support 52.

[0053] Preferably, the tool further comprises: a blowout prevention box 7, the blowout prevention box 7 being detachably arranged on the valve, the piston rod of the second telescopic component 62 being detachably connected with the blowout prevention box 7, the first rod member 11 passing through the blowout prevention box 7, and the inner wall surface of the blowout prevention box 7 and the outer wall surface of the first rod member 11 being movably and sealingly connected.

[0054] It is worth mentioning that the blowout preventer box 7 can be detachably installed on the valve by bolts, and O-rings are arranged between the blowout preventer box 7 and the valve; the threaded rod of the piston rod of the second telescopic component 62 is arranged in the blowout preventer box 7, and nuts for limiting are arranged on both sides of the blowout preventer box 7.

[0055] It can be understood that a sealing ring is additionally arranged between the inner wall surface of the blowout preventer box 7 and the outer wall surface of the first rod 11 to prevent the pressure in the well hole from leaking; the specific sealing installation is a technology known in the art, and thus will not be described here.

[0056] In the embodiment, the first telescopic component 61 and the second telescopic component 62 are both hydraulic cylinders, and the hydraulic oil of the first telescopic component 61 and the second telescopic component 62 is also supplied by the hydraulic pump.

[0057] Those skilled in the art should understand that, although the preferred embodiments of the utility model have been described, those skilled in the art can make other changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model. Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and changes of the utility model fall within the scope of the equivalent technology of the claims of the utility model, the utility model also intends to include these changes and modifications.

Claims

1. A pressure over line-up tool, comprising: The utility model relates to a kind of plug expansion device, including: First bar (11), inside hollow; Plug body (21) is made of elastic material, is cylindrical, is detachably arranged in one end of first bar (11); Expansion component (22) is made of elastic material, is located in the side of plug body (21) away from first bar (11); Second bar (12) is slidably arranged in first bar (11), and one end of second bar (12) passes through plug body (21) and is detachably connected expansion component (22); Driving assembly is used to drive second bar (12) moves along the axial direction, so as to drive second bar (12) to pull expansion component (22) into plug body (21), so as to drive plug body (21) to expand along radial direction; Plug seat (3) is used to press plug body (21).

2. The under-press non-losing-hand valve changing tool of claim 1, wherein, Driving assembly includes: Barrel (41) is arranged in the end of first bar (11) away from plug body (21); Piston (42) is slidably arranged in barrel (41), and piston (42) is detachably connected the end of second bar (12) away from expansion component (22); High-pressure source can inject high-pressure medium into barrel (41), so as to push piston (42) to slide in barrel (41).

3. The under-press non-losing-hand valve changing tool of claim 2, wherein, Driving assembly further includes: spring (43), one end of spring (43) abuts barrel (41), the other end of spring (43) abuts piston (42), for driving piston (42) reset.

4. The under-press non-losing-hand valve changing tool of claim 2, wherein, Further include, medium channel (44) is opened in piston (42), for conveying high-pressure medium; Pressure relief valve (45) is arranged in one end of medium channel (44) and is communicated with high-pressure source.

5. The under-press non-losing-hand valve changing tool of claim 1, wherein, Further include first step surface and second step surface, first step surface is arranged in one end of plug body (21), and second step surface is arranged in one end of expansion component (22);First step surface can be embedded into second step surface.

6. The tubing pressure-against-hand-off valve tool of claim 5, wherein, The end of expansion component (22) away from second step surface is conical.

7. The under-press non-losing-hand valve changing tool of claim 1, wherein, Further include: Connector (23) is fixedly connected plug body (21) in one end, and is detachably connected first bar (11) in the other end, and scale line is arranged on the outer wall surface of connector (23); Connecting rod (24) is fixedly connected expansion component (22) in one end, and is detachably connected second bar (12) in the other end.

8. The under-press non-losing-hand valve changing tool of claim 1, wherein, Further include: First support (51) is fixedly installed; First telescopic component (61) is fixedly arranged on the main body of first support (51); Second support (52) is fixedly installed on the piston rod of first telescopic component (61), and first bar (11) is arranged on second support (52); Second telescopic component (62) is fixedly arranged on the main body of second support (52), and the piston rod of second telescopic component (62) is detachably connected valve.

9. The line pressure on and not lost circulation valve tool of claim 8, wherein, Further include: The blowout preventer box (7) is detachably arranged on the valve, the piston rod of the second telescopic part (62) is detachably connected with the blowout preventer box (7), the first rod (11) passes through the blowout preventer box (7), and the inner wall surface of the blowout preventer box (7) and the outer wall surface of the first rod (11) are connected through movable sealing.

10. The under-press non-losing-hand valve changing tool of claim 1, wherein, The plug seat (3) is a crescent flange, and a centralizer is further arranged on the plug seat (3).

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