CN211692366U - Multilayer bypass hole type bypass valve for continuous oil pipe - Google Patents
Multilayer bypass hole type bypass valve for continuous oil pipe Download PDFInfo
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- CN211692366U CN211692366U CN201922393444.7U CN201922393444U CN211692366U CN 211692366 U CN211692366 U CN 211692366U CN 201922393444 U CN201922393444 U CN 201922393444U CN 211692366 U CN211692366 U CN 211692366U
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Abstract
The utility model provides a multilayer bypass hole type bypass valve for a continuous oil pipe, which comprises a valve body, a sliding sleeve, a sealing ring and an elastic part, wherein the valve body is of a hollow structure, a plurality of outflow layers which are parallel to each other and can enable liquid in the valve body to flow out of the valve body are arranged on the valve wall of the valve body, and each outflow layer comprises a plurality of bypass holes which penetrate through the valve wall; the sliding sleeve is sleeved in the hollow structure of the valve body and can axially slide in the hollow structure, and the sliding sleeve can open or close the bypass hole; the sealing ring is arranged between the sliding sleeve and the valve wall of the valve body; the elastic piece can provide elasticity opposite to the flow direction of liquid in the valve body for the sliding sleeve so as to restore the sliding sleeve and block the bypass hole. The utility model discloses a bypass valve does not adopt the mode of bowling to realize the switching of bypass valve, can realize not having special operations such as brill leaking stoppage, shortens well drilling cycle.
Description
Technical Field
The utility model relates to a tool preparation technical field in the pit, more specifically say, relate to a multilayer by-pass hole formula bypass valve for coiled tubing.
Background
The conventional normally closed bypass valve is usually opened and closed by adopting a mode of throwing balls for many times, and the bypass valve has the defects that the ball throwing is required for opening or closing the bypass valve every time, the operation is complicated, and the ball throwing times are limited.
SUMMERY OF THE UTILITY MODEL
To overcome the deficiencies in the prior art, one of the objects of the present invention is to solve one or more of the problems of the prior art. For example, one of the objects of the present invention is to provide a bypass valve capable of realizing a function of opening and closing a coiled tubing many times by adjusting a displacement.
In order to achieve the above object, an aspect of the present invention provides a multilayer bypass hole type bypass valve for a coiled tubing, the bypass valve may include a valve body, a sliding sleeve, a sealing ring and an elastic member, wherein the valve body is of a hollow structure, and includes a first valve body and a second valve body sleeved with the first valve body, a valve wall of the second valve body is disposed in a hollow space of the first valve body at a sleeved position of the first valve body and the second valve body, and a step is formed on an end surface of the valve wall of the second valve body, a plurality of outflow layers which are parallel to each other and can enable liquid in the valve body to flow out of the valve body are disposed on the valve wall of the first valve body, and each outflow layer includes a plurality of bypass holes penetrating through the valve wall; the sliding sleeve is sleeved in the hollow structure of the valve body and can axially slide in the hollow structure, a circulation channel which is communicated with the hollow structure of the valve body and has a radial dimension smaller than that of the hollow structure of the valve body is arranged in the middle of the sliding sleeve along the radial direction, the sliding sleeve comprises a first sliding sleeve part and a second sliding sleeve part which are connected with each other, the radial dimension of the first sliding sleeve part is larger than that of the second sliding sleeve part, the first sliding sleeve part is attached to the inner side of the valve wall of the first valve body, a cavity is formed by the first sliding sleeve part, the second sliding sleeve part, the first valve body and the stepped platform, one end of the second sliding sleeve part is connected with the first sliding sleeve part, and the other end of the second sliding sleeve part is arranged in the hollow structure of the second valve body and attached to the inner side of the valve wall of the second valve body; the sealing rings comprise a first sealing ring and a second sealing ring, the first sealing ring is arranged between the first sliding sleeve part and the valve wall of the first valve body, and the second sealing ring is arranged between the second sliding sleeve part and the valve wall of the second valve body; the elastic piece is arranged in the cavity, one end of the elastic piece is arranged on the step platform, the other end of the elastic piece is connected with the sliding sleeve, and the elastic piece can provide elastic force opposite to the flow direction of liquid in the valve body for the sliding sleeve so as to restore the sliding sleeve and block the bypass hole.
In an exemplary embodiment of the multi-layer bypass hole type bypass valve for coiled tubing of the present invention, the first valve body and the second valve body may be threadedly connected.
In an exemplary embodiment of the multi-layer bypass hole type bypass valve for coiled tubing of the present invention, the outflow layer may be set to 3 to 5 layers.
In an exemplary embodiment of the multi-layer bypass hole type bypass valve for coiled tubing, each outflow layer may include 2 to 10 bypass holes.
In an exemplary embodiment of the multi-layer bypass hole type bypass valve for coiled tubing of the present invention, the elastic member may be a spring.
In an exemplary embodiment of the utility model, the one end of cup joint department can be provided with the external screw thread.
In an exemplary embodiment of the multi-layer bypass hole type bypass valve for coiled tubing of the present invention, the end of the second valve body away from the sleeve joint may be provided with an internal thread.
In an exemplary embodiment of the multi-layer bypass hole type bypass valve for coiled tubing, the first sealing ring may be fixedly disposed on the first sliding sleeve portion, and the second sealing ring may be fixedly disposed on the second sliding sleeve portion.
Compared with the prior art, the beneficial effects of the utility model include:
(1) the multi-layer outflow layer arranged in the utility model can prevent the liquid in the valve from flowing out in a large quantity to damage the bypass valve structure;
(2) the bypass valve of the utility model can realize the opening and closing of the bypass valve without adopting a ball-throwing mode, can realize multiple underground opening and closing operations, can improve the annular space flow velocity in the drilling of a horizontal well and a directional well, and enhances the cleaning capacity of the lower side of the well wall;
(3) the bypass valve of the utility model can realize special operations such as no drilling and leaking stoppage, shorten the drilling period, automatically close the bypass valve when the pump is stopped, and avoid the possible U-shaped pipe effect or well control problem;
(4) the utility model discloses a bypass valve does not receive instrument, instrument and drill bit water hole restriction in the pit, can realize that big discharge capacity washes the well, can realize the switch operation in the pit many times.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram illustrating a closed state of a multi-layer bypass hole type bypass valve for a coiled tubing according to an exemplary embodiment of the present invention;
fig. 2 is a schematic structural view illustrating a opened state of a multilayer bypass hole type bypass valve for a coiled tubing according to an exemplary embodiment of the present invention.
Description of reference numerals:
1-valve body, 1 a-first valve body, 1 b-second valve body, 2-sliding sleeve, 2 a-first sliding sleeve part, 2 b-second sliding sleeve part, 3-sealing ring, 3 a-first sealing ring, 3 b-second sealing ring, 4-elastic part, 5-step table, 6-bypass hole, 7-flow channel, 8-cavity, 9 a-first layer outflow layer, 9 b-second layer outflow layer and 9 c-third layer outflow layer.
Detailed Description
Hereinafter, a multilayer bypass hole type bypass valve for a coiled tubing according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
FIG. 1 is a schematic diagram illustrating a closed state of a multi-layer bypass hole type bypass valve for a coiled tubing according to an exemplary embodiment of the present invention; fig. 2 is a schematic structural view illustrating a opened state of a multilayer bypass hole type bypass valve for a coiled tubing according to an exemplary embodiment of the present invention.
The utility model provides a multilayer by-pass hole formula bypass valve for coiled tubing. In an exemplary embodiment of the multi-layer bypass hole type bypass valve for coiled tubing of the present invention, as shown in fig. 1, the bypass valve may include a valve body 1, a sliding sleeve 2, a sealing ring 3, and an elastic member 4. Wherein the content of the first and second substances,
the valve body 1 has a hollow structure. The valve body 1 may be cylindrical. The valve body 1 may include a first valve body 1a of a hollow structure and a second valve body 1b of a hollow structure. One end of the first valve body 1a is sleeved at one end of the second valve body 1 b. At the sleeve joint, the valve wall of the second valve body 1b is arranged in the hollow structure of the first valve body 1a and is tightly attached to the valve wall of the first valve body 1 a. A step 5 is formed at the end of the valve wall where the second valve body 1b is placed in the first valve body 1a, as shown in fig. 1. The valve wall of the first valve body 1a is provided with a plurality of outflow layers (9a, 9b, and 9c) which enable the liquid in the valve body 1 to flow out of the valve body. The outflow layers of each layer are arranged in parallel and each outflow layer comprises a plurality of bypass holes 6 penetrating through the valve body wall of the first valve body 1 a. Namely, the valve body wall of the first valve body 1a is provided with a plurality of bypass holes penetrating through the valve wall. The hole center lines of partial bypass holes in the plurality of bypass holes are positioned in the same plane to form a first layer of outflow layer. The hole center lines of partial bypass holes in the plurality of bypass holes are positioned in another plane parallel to the plane to form a second layer of outflow layer, and by analogy, the plurality of bypass holes can form a plurality of layers of outflow layers. The outflow layer of each layer may include a plurality of bypass apertures. For example, as shown in FIG. 1, there are a total of 3 bleed layers (9a, 9b, and 9c as shown in FIG. 1).
The sliding sleeve 2 is shown arranged in the hollow structure of the valve body 1. The shape of the sliding sleeve 2 is matched with the shape of the hollow structure of the valve body 1. The sliding sleeve 2 is provided with a flow channel 7 communicating with the hollow structure of the valve body 1 in the middle in the radial direction. The flow channel 7 enables fluid in the valve body to flow through the sliding sleeve. The sliding sleeve 2 may include a first sliding sleeve portion 2a and a second sliding sleeve portion 2 b. The radial dimension of the first sleeve part 2a is larger than the radial dimension of the second sleeve part 2 b. As shown in fig. 1, the outer side of the first sleeve portion 2a is fitted to the inner side of the valve body wall of the first valve body 1a in the radial direction. One end of the second sliding sleeve part 2b is connected with the first sliding sleeve part 2a, and the other end is attached to the inner wall of the second valve body 1 b. A cavity 8 is enclosed among the first sliding sleeve part 2a, the second sliding sleeve part 2b, the step platform 5 and the first valve body 1 a. As shown in fig. 1, in a state that the bypass valve is closed, the sliding sleeve 2 is disposed outside the plurality of bypass holes 6 to block the bypass holes.
The seal rings 3 may include a first seal ring 3a and a second seal ring 3 b. The first seal ring 3a is disposed between the first sleeve portion 2a and the valve wall of the first valve body 1 a. The second seal ring 3b is disposed between the second sleeve portion 2b and the valve wall of the second valve body 1 b. As shown in fig. 1, the first sealing ring is located at the upper end of the bypass hole. The first sealing ring and the second sealing ring can prevent liquid in the valve body from flowing out through the bypass hole.
The resilient member 4 is arranged in the cavity 8. One end of the elastic member 4 may be disposed on the step 5, and the other end is connected to the sliding sleeve 2. The elastic member 4 can provide an elastic force opposite to the flow direction of the liquid in the valve body to the sliding sleeve 2 so as to restore the sliding sleeve to block the bypass hole (the restoring is to change the sliding sleeve state of fig. 2 into the sliding sleeve state of fig. 1).
Specifically, in the initial state (when the bypass valve is closed, as shown in fig. 1), the first sealing ring 3a and the second sealing ring 3b are positioned at both ends of the bypass hole 6, so that the liquid in the bypass valve 1 cannot flow to the annulus through the bypass hole 6. The bypass valve and other downhole tools may be connected in turn to the lower end of the coiled tubing and run downhole. The bypass valve is initially in a closed state, and the sliding sleeve 2 cannot move downwards in the initial state under the reaction force of the elastic member 4. When liquid is pumped into the continuous oil pipe, the liquid can flow through the flow channel 7 in the middle of the sliding sleeve 2 when passing through the bypass valve, and because the diameter of the flow channel 7 in the middle of the sliding sleeve 2 is smaller than the radial size of the hollow structure of the bypass valve, when the liquid flows through the flow channel 7 in the middle of the sliding sleeve 2, a pressure difference can be generated at the upper end and the lower end of the sliding sleeve 2, so that the pressure at the upper end of the sliding sleeve 2 is greater than the pressure at the lower end. And the larger the displacement is, the larger the pressure difference value between the upper end and the lower end of the sliding sleeve 2 is. Under the action of this pressure difference, the sliding sleeve 2 will move downwards against the upward reaction force of the elastic member 4. When the displacement exceeds a threshold value, the sliding sleeve 2 can be pushed downwards to a certain position, the first sealing element 3a is positioned at the lower end of the bypass hole 6, the pipe of the bypass valve is communicated with the annular space, and therefore part of fluid is reserved from the bypass hole to the annular space to realize the function of opening the bypass valve, as shown in fig. 2 (the structural arrangement in fig. 2 is the same as that in fig. 1, and only the position of the sliding sleeve is changed).
When reducing the discharge capacity once more after, sliding sleeve 2 is upper, the pressure differential value at lower both ends reduces, sliding sleeve 2 is upper this moment, the pressure differential at lower both ends is less than the ascending reaction force of elastic component 4, under the reaction force of elastic component 4, sliding sleeve 2 can up move, when the discharge capacity is less than a threshold value, sliding sleeve 2 can be pushed up a certain position, the completion resets, first sealing member 3a is located the upper end of bypass hole this moment, intraductal and annular space isolation of bypass valve, no longer have the fluid to leave the annular space from the bypass hole, thereby realize the function that the bypass valve closed.
The utility model discloses set up multilayer by pass structure (multilayer outflow layer), when the outflow was counted more than 1 layer by layer, when the discharge capacity risees gradually, sliding sleeve 2 downstream at first opened 1 st layer outflow layer 9a, continues to increase the discharge capacity, and sliding sleeve 2 continues downstream, then can open 2 nd layer outflow layer 9b and 3 rd layer outflow layer 9c in proper order, as shown in figure 2. Compared with a structure with only one outflow layer, in the structure with a plurality of outflow layers, the total overflowing area of each layer of bypass hole is smaller than that of the outflow layer; when only opening 1 st floor outflow layer, compare in the structure that only one deck outflow layer was gone out, only less fluid gets into the annular space through 1 st floor outflow layer, when opening 2 nd floor outflow layer, have more fluid and get into the annular space through 1 st floor outflow layer and 2 nd floor outflow layer, when opening 3 rd floor outflow layer, the fluid flow through 3 layers outflow layer is the same with the flow that only one deck outflow layer structure passed through when opening. The multilayer outflow layer structure can enable the flow passing through the bypass hole to be increased step by step, and reduces the vibration of the sliding sleeve 2 and the impact on the first sealing element 3a caused by the fact that large flow suddenly enters the bypass hole when the structure of only one layer of outflow layer is opened.
In this embodiment, the first valve body and the second valve body may be connected by a screw thread.
In this embodiment, the outflow layer may be set to 3 to 5 layers, and further, may be set to 4 layers. Of course, the number of layers set in the outflow layer is not limited to this, and the flow rate of the actual liquid can be set.
In this embodiment, each outflow layer may include 2 to 10 bypass holes. Of course, the number of the bypass holes of the outflow layer is not limited thereto, and the bypass holes can be set according to the flow of the actual liquid.
In this embodiment, the elastic member may be a spring.
In this embodiment, an external thread may be disposed at an end of the first valve body away from the sleeve joint.
In this embodiment, an end of the second valve body away from the socket may be provided with an internal thread.
In this embodiment, the first seal ring is fixed to the first sliding sleeve, and the second seal ring is fixed to the second sliding sleeve. As shown in fig. 2, the first and second seal rings are movable with the sleeve when the bypass valve is open.
In summary, the bypass valve of the utility model can realize the opening and closing of the bypass valve without adopting a ball throwing mode, can realize multiple underground opening and closing operations, can improve the annular space flow velocity in the drilling of a horizontal well and a directional well, and enhances the cleaning capacity of the lower side of the well wall; special operations such as no drilling and leakage plugging can be realized, the drilling period is shortened, the bypass valve can be automatically closed when the pump is stopped, and the possible U-shaped tube effect or well control problem is avoided; the large-displacement well washing can be realized, and multiple underground switch operations can be realized.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A multilayer bypass hole type bypass valve for a coiled tubing is characterized by comprising a valve body, a sliding sleeve, a sealing ring and an elastic piece, wherein,
the valve body is of a hollow structure and comprises a first valve body and a second valve body sleeved with the first valve body, wherein at the sleeved position of the first valve body and the second valve body, the valve wall of the second valve body is arranged in the hollow structure of the first valve body, a step platform is formed on the end face of the valve wall of the second valve body, a plurality of parallel outflow layers capable of enabling liquid in the valve body to flow out of the valve body are arranged on the valve wall of the first valve body, and each outflow layer comprises a plurality of bypass holes penetrating through the valve wall;
the sliding sleeve is sleeved in the hollow structure of the valve body and can axially slide in the hollow structure to plug or open the bypass hole, a circulation channel which is communicated with the hollow structure of the valve body and has a radial size smaller than that of the hollow structure of the valve body is arranged in the middle of the sliding sleeve along the radial direction, the sliding sleeve comprises a first sliding sleeve part and a second sliding sleeve part which are connected with each other, the radial size of the first sliding sleeve part is larger than that of the second sliding sleeve part, the first sliding sleeve part is attached to the inner side of the valve wall of the first valve body, a cavity is formed by the first sliding sleeve part, the second sliding sleeve part, the first valve body and the step platform, one end of the second sliding sleeve part is connected with the first sliding sleeve part, and the other end of the second sliding sleeve part is arranged in the hollow structure of the second valve body and attached to the inner side of the valve wall of the second valve body;
the sealing rings comprise a first sealing ring and a second sealing ring, the first sealing ring is arranged between the first sliding sleeve part and the valve wall of the first valve body, and the second sealing ring is arranged between the second sliding sleeve part and the valve wall of the second valve body;
the elastic piece is arranged in the cavity, one end of the elastic piece is arranged on the step platform, the other end of the elastic piece is connected with the sliding sleeve, and the elastic piece can provide elastic force opposite to the flow direction of liquid in the valve body for the sliding sleeve so as to restore the sliding sleeve and block the bypass hole.
2. The multilayer bypass orifice bypass valve for a coiled tubing of claim 1, wherein the first valve body is threadably connected to the second valve body.
3. The multilayer bypass hole type bypass valve for the continuous oil pipe according to claim 1, wherein the outflow layer is provided in 3-5 layers.
4. The multilayer bypass hole type bypass valve for coiled tubing according to claim 1 or 3, wherein each outflow layer comprises 2-10 bypass holes.
5. The multilayer bypass orifice type bypass valve for a coiled tubing according to claim 1, wherein the elastic member is a spring.
6. The multilayer bypass orifice type bypass valve for a coiled tubing according to claim 1, wherein an end of the first valve body away from the socket joint is provided with an external thread.
7. The multilayer bypass orifice type bypass valve for a coiled tubing according to claim 1, wherein an end of the second valve body away from the socket is provided with an internal thread.
8. The multilayer bypass hole type bypass valve for the coiled tubing according to claim 1, wherein the first sealing ring is fixedly disposed on the first sliding sleeve portion, and the second sealing ring is fixedly disposed on the second sliding sleeve portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922393444.7U CN211692366U (en) | 2019-12-26 | 2019-12-26 | Multilayer bypass hole type bypass valve for continuous oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922393444.7U CN211692366U (en) | 2019-12-26 | 2019-12-26 | Multilayer bypass hole type bypass valve for continuous oil pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211692366U true CN211692366U (en) | 2020-10-16 |
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ID=72795331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922393444.7U Active CN211692366U (en) | 2019-12-26 | 2019-12-26 | Multilayer bypass hole type bypass valve for continuous oil pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211692366U (en) |
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2019
- 2019-12-26 CN CN201922393444.7U patent/CN211692366U/en active Active
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