CN215371070U - Closed positive circulation plug valve - Google Patents
Closed positive circulation plug valve Download PDFInfo
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- CN215371070U CN215371070U CN202121747844.4U CN202121747844U CN215371070U CN 215371070 U CN215371070 U CN 215371070U CN 202121747844 U CN202121747844 U CN 202121747844U CN 215371070 U CN215371070 U CN 215371070U
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- valve seat
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- lower valve
- ball
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Abstract
A closed positive circulation plug valve belongs to the technical field of internal blowout prevention tools and solves the problem of frequent opening and closing of a plug valve in oil field drilling operation and comprises a valve body, an upper valve seat, a ball valve, a lower valve seat and a knob, wherein the upper valve seat, the ball valve and the lower valve seat are sequentially arranged in the valve body to form a sealing pair; when the ball valve is in a closed state, the direction of the linear chute is parallel to the axial direction of the valve body; a primary boss is arranged on the inner wall of the valve body at the lower side of the lower valve seat, a spring supporting the lower valve seat is arranged between the lower valve seat and the primary boss, and the lower valve seat is in sliding fit with the valve body; a channel for communicating the upper part of the lower valve seat with the interior of the lower valve seat is arranged on the lower valve seat, so that the positive circulation operation can be carried out in the closing state of the ball valve; the utility model is used for the oil field drilling operation.
Description
Technical Field
The utility model belongs to the technical field of internal blowout prevention tools, and particularly relates to a closed positive circulation plug valve.
Background
The plug valve is a common tool for oil field drilling operation, and is required to be opened during normal circulation operation at present, and is closed after the normal circulation operation is completed, so that the frequent opening and closing of the plug valve are caused, the time is wasted, the abrasion of the plug valve is accelerated, and the drilling cost is improved.
Disclosure of Invention
The utility model aims to solve the problem of frequent opening and closing of a plug valve in oilfield drilling operation, and provides a closed type positive circulation plug valve, which adopts the following technical scheme:
a closed positive circulation plug valve comprises a valve body, an upper valve seat, a ball valve, a lower valve seat and a knob, wherein the upper valve seat, the ball valve and the lower valve seat are sequentially arranged in the valve body to form a sealing pair; when the ball valve is in a closed state, the direction of the linear chute is parallel to the axial direction of the valve body; the above is the prior art; a first-stage boss is arranged on the inner wall of the valve body on the lower side of the lower valve seat, a spring is arranged between the lower valve seat and the first-stage boss to support the lower valve seat, and the lower valve seat is in sliding fit with the valve body, so that the lower valve seat can slide downwards when being pressed and can reset under the action of the spring; because the ball valve and the knob are matched with the linear sliding groove through the linear sliding block, the lower valve seat can slide downwards, and the ball valve can move downwards when being subjected to the pressure of positive cycle operation and is separated from the upper valve seat; the lower valve seat is provided with a channel communicated from the upper part to the inner part, namely a through hole is arranged between the upper surface and the inner surface of the lower valve seat, when the ball valve is separated from the upper valve seat, a passage is formed in the valve body, and therefore the positive cycle operation can be carried out in the closing state of the ball valve.
The utility model has the beneficial effects that: the positive circulation operation can be carried out in the closing state of the ball valve, the ball valve can be separated from the upper valve seat by the liquid pressure of the positive circulation operation, and the liquid flows out from the side surface of the ball valve and then flows out through a channel arranged on the lower valve seat; therefore, frequent opening and closing of the plug valve are avoided, time is saved, abrasion of the plug valve is reduced, and drilling cost is reduced.
Description of the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional front view of the present invention;
FIG. 3 is an exploded schematic view of FIG. 2;
FIG. 4 is a side cross-sectional structural schematic of the present invention;
FIG. 5 is a schematic cross-sectional view of the lower valve seat;
FIG. 6 is a schematic illustration of the present invention in a positive cycle operation with the ball valve closed;
fig. 7 is a schematic view of the passage provided in the lower valve seat penetrating the outer wall thereof.
The specific implementation mode is as follows:
referring to fig. 1 to 7, a closed positive circulation plug valve comprises a valve body 1, an upper valve seat 2, a ball valve 3, a lower valve seat 4 and a knob 5, wherein the upper valve seat 2, the ball valve 3 and the lower valve seat 4 are sequentially arranged in the valve body 1 to form a sealing pair, the upper valve seat 2 is fixedly connected with the valve body 1, the ball valve 3 is clamped between the upper valve seat 2 and the lower valve seat 4, the knob 5 is arranged on one side of the ball valve 3 and used for rotating the ball valve 3, the ball valve 3 and the knob 5 are driven by matching of a linear sliding block 3-1 and a linear sliding groove 3-2, a linear sliding block 3-1 can be arranged on the ball valve 3, a linear sliding groove 3-2 is arranged on the knob 5, a linear sliding groove 3-2 can also be arranged on the ball valve 3, and a linear sliding block 3-1 is arranged on the knob 5; when the ball valve 3 is in a closed state, the direction of the linear chute 3-2 is parallel to the axial direction of the valve body 1; the above is the prior art; a primary boss 1-1 is arranged on the inner wall of the valve body 1 at the lower side of the lower valve seat 4, a spring 6 is arranged between the lower valve seat 4 and the primary boss 1-1 to support the lower valve seat 4, and the lower valve seat 4 is in sliding fit with the valve body 1, so that the lower valve seat 4 can slide downwards when being pressed and can reset under the action of the spring 6; because the ball valve 3 and the knob 5 are matched with the linear chute 3-2 through the linear slide block 3-1, and the lower valve seat 4 can slide downwards, the ball valve 3 can move downwards when being subjected to the pressure of positive cycle operation and is separated from the upper valve seat 2; a channel 4-1 which is communicated with the upper part of the lower valve seat 4 to the interior of the lower valve seat is arranged on the lower valve seat 4, namely a through hole is arranged between the upper surface and the inner surface of the lower valve seat 4, when the ball valve 3 is separated from the upper valve seat 2, a passage is formed in the valve body 1, and therefore the positive circulation operation can be carried out when the ball valve 3 is closed.
Preferably, a sleeve 7 in sliding fit with the first-stage boss 1-1 is arranged on the lower side of the lower valve seat 4, a second-stage boss 1-2 for limiting the stroke of the lower valve seat 4 is arranged on the inner wall of the valve body 1, and the stroke of the lower valve seat 4 is limited not to be larger than the effective stroke of the ball valve 3, namely, the ball valve 3 and the knob 5 are limited to be kept connected with a linear sliding groove 3-2 through a linear sliding block 3-1, so that the problem that the ball valve 3 is difficult to reset due to the fact that the ball valve 3 descends to be separated from the knob 5 when the positive circulation pressure is too high is avoided; the sleeve 7 also acts to protect the spring 6.
Preferably, the passage 4-1 provided in the lower valve seat 4 is formed to penetrate the outer wall thereof, thereby making efficient use of space.
Preferably, the upper valve seat 2 is fixed by a clamp spring 2-1, so that the assembly is convenient.
Claims (5)
1. A closed positive circulation plug valve comprises a valve body (1), an upper valve seat (2), a ball valve (3), a lower valve seat (4) and a knob (5), wherein the upper valve seat (2), the ball valve (3) and the lower valve seat (4) are sequentially arranged in the valve body (1) to form a sealing pair, the upper valve seat (2) is fixedly connected with the valve body (1), the ball valve (3) is clamped between the upper valve seat (2) and the lower valve seat (4), the knob (5) is arranged on one side of the ball valve (3), the ball valve (3) and the knob (5) are driven by matching of a linear sliding block (3-1) and a linear sliding groove (3-2), and when the ball valve (3) is in a closed state, the direction of the linear sliding groove (3-2) is parallel to the axial direction of the valve body (1); the valve is characterized in that a first-stage boss (1-1) is arranged on the inner wall of the valve body (1) at the lower side of the lower valve seat (4), a spring (6) is arranged between the lower valve seat (4) and the first-stage boss (1-1) to support the lower valve seat (4), and the lower valve seat (4) is in sliding fit with the valve body (1); a channel (4-1) which is communicated with the upper part of the lower valve seat (4) to the interior is arranged on the lower valve seat.
2. A closed type positive circulation plug valve according to claim 1, wherein a sleeve (7) which is in sliding fit with the primary boss (1-1) is provided on the lower side of the lower valve seat (4), and a secondary boss (1-2) which limits the stroke of the lower valve seat (4) is provided on the inner wall of the valve body (1), so that the stroke of the lower valve seat (4) is limited not to be larger than the effective stroke of the ball valve (3).
3. A closed positive cycle plug valve according to claim 1 or 2 wherein the passage (4-1) provided in the lower seat (4) is formed through the outer wall thereof.
4. A closed positive cycle plug valve according to claim 1 or 2 wherein the upper valve seat (2) is secured by a circlip (2-1).
5. A closed positive cycle plug valve according to claim 3 wherein the upper valve seat (2) is secured by a circlip (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121747844.4U CN215371070U (en) | 2021-07-29 | 2021-07-29 | Closed positive circulation plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121747844.4U CN215371070U (en) | 2021-07-29 | 2021-07-29 | Closed positive circulation plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215371070U true CN215371070U (en) | 2021-12-31 |
Family
ID=79612855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121747844.4U Active CN215371070U (en) | 2021-07-29 | 2021-07-29 | Closed positive circulation plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215371070U (en) |
-
2021
- 2021-07-29 CN CN202121747844.4U patent/CN215371070U/en active Active
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