CN211174039U - Anti-reverse-spitting blanking plug - Google Patents
Anti-reverse-spitting blanking plug Download PDFInfo
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- CN211174039U CN211174039U CN201921693138.9U CN201921693138U CN211174039U CN 211174039 U CN211174039 U CN 211174039U CN 201921693138 U CN201921693138 U CN 201921693138U CN 211174039 U CN211174039 U CN 211174039U
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Abstract
The utility model provides a prevent returning blanking plug. Relates to the technical field of oilfield flooding. Including body, throwing and dragging for first etc, body sub-unit connection end cap, end cap upper portion is equipped with floating piston, and end cap lower part is opened has the water distribution hole, and the water distribution hole communicates with centre bore down, and centre bore top has expanded the conical ring down, and floating piston's last plane is opened there is the counter bore, and the cone upper portion of floating piston lower part is opened all around has water conservancy diversion hole and counter bore intercommunication, and body lower part hole center is opened there is the centre bore, and the centre bore both ends are the horn mouth structure. Because the utility model uses the pressure change and pressure difference above and below the central hole of the blanking plug body as the power for opening and closing the injection channel, the strong shearing action of the one-way valve structure of the spring structure on the polymer is avoided, and the cone ring structure are adopted at the same time; a bell mouth structure at two ends of the central hole; the flow channel hole direction is designed, so that the change of the flow speed and the direction of the polymer is slowed down, the degradation probability of the polymer is reduced, and the polymer flooding effect is improved.
Description
The technical field is as follows:
the utility model belongs to the technical field of the oil field water injection technique and specifically relates to a prevent returning and tell blanking plug.
Background art:
the polymer flooding is already popularized and applied in China as a main measure for tertiary oil recovery and is implemented and finished. The polymer flooding aims at raising the viscosity of injected water liquid phase, lowering the oil-water fluidity ratio, raising the swept volume of injected water or fluid, starting the water flooding to raise the oil recovering rate of oil deposit.
When the injection pressure suddenly drops in the processes of stopping injection, reducing pressure and washing a separate-layer polymer injection well by using the injection allocation device and the blanking plug, liquid in the stratum can carry polymer lumps and stratum sand to enter the blanking plug, the injection allocation device and the polymer injection pipe column to block the injection allocation tool and the blanking plug, so that the test tool cannot enter the well and a well washing channel is blocked.
The utility model has the following contents:
in order to solve the problem, the utility model provides an anti-regurgitation blanking plug.
The technical scheme of the utility model is that: a blockage preventing reverse discharging comprises a body, a throwing and fishing head, an upper support, a compression spring, a torsion spring, a cam, a liquid outlet hole and sealing grooves arranged on two sides of the liquid outlet hole, wherein the lower part of the body is in threaded sealing connection with a bottom cap, and a floating piston is arranged on the upper part of the bottom cap;
the upper part of the bottom cap is in threaded sealing connection with the lower part of the body, the lower part of the bottom cap is of a semi-sphere structure, a plurality of water distribution holes are formed in the periphery of the semi-sphere and are communicated with a lower central hole of the bottom cap, and a conical ring is expanded at the top of the lower central hole;
the center of the upper plane of the floating piston is provided with a counter bore, the outer diameter of the floating piston is in clearance fit connection with an inner bore at the lower part of the body, the lower part of the floating piston is a cone, the periphery of the upper part of the cone is provided with a plurality of flow guide holes, and the flow guide holes are communicated with the counter bore;
the upper part of the inner hole and the upper part of the clearance fit hole of the floating piston are a plane, the center of the plane is provided with a center hole, and both ends of the center hole are of a horn mouth structure;
the conical angle of the conical ring is matched and connected with the conical angle of the cone.
The position of the flow guide hole on the cone is positioned on the connecting surface of the cone and the conical ring.
The utility model discloses following beneficial effect has: because the utility model uses the pressure change and pressure difference above and below the central hole of the blanking plug body as the power for opening and closing the injection channel, the strong shearing action of the one-way valve structure of the spring structure on the polymer is avoided, and the cone ring structure are adopted at the same time; a bell mouth structure at two ends of the central hole; the design of the direction of the diversion holes enables the change of the flow speed and the direction of the polymer to be gradual, the degradation probability of the polymer is reduced, and the polymer flooding effect is improved.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an enlarged view at A of FIG. 1;
fig. 3 is a schematic diagram of the operation of the present invention.
In the figure, 1-a throwing and fishing head, 2-an upper bracket, 3-a compression spring, 4-a torsion spring, 5-a cam, 6-a body, 7-a sealing groove, 8-a liquid outlet hole, 9-a bottom cap, 10-a floating piston, 11-a flow guide hole, 12-a water distribution hole, 13-a central hole, 14-a counter bore, 15-a cone, 16-a conical ring and 17-a lower central hole.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2 to 3, the anti-reverse-flow blanking plug comprises a body 6, a throwing and fishing head 1, an upper bracket 2, a compression spring 3, a torsion spring 4, a cam 5, a liquid outlet hole 8 and sealing grooves 7 arranged at two sides of the liquid outlet hole 8, wherein the lower part of the body 6 is in threaded sealing connection with a bottom cap 9, and a floating piston 10 is arranged at the upper part of the bottom cap 9;
the upper part of the bottom cap 9 is in threaded sealing connection with the lower part of the body 6, the lower part of the bottom cap 9 is of a semi-sphere structure, the semi-sphere structure is convenient for the throwing and fishing of the blanking plug, a plurality of water distribution holes 12 are formed in the periphery of the semi-sphere, different water distribution amounts can be used for replacing the bottom caps 9 with the water distribution holes 12 of different sizes, the water distribution holes 12 are communicated with a lower central hole 17 of the bottom cap, and a conical ring 16 is expanded at the top of the lower central hole 17;
the upper plane center position of the floating piston 10 is provided with a counter bore 14, the outer circle diameter of the floating piston 10 is in clearance fit connection with an inner bore at the lower part of the body 6, the lower part of the floating piston 10 is provided with a cone 15, the periphery of the upper part of the cone 15 is provided with a plurality of flow guide holes 11, the flow guide holes 11 are communicated with the counter bore 14, liquid does not pass through the matching surface of the floating piston 10 and the inner bore at the lower part of the body 6, and the liquid flows more smoothly;
the lower inner hole of the body 6, the upper part of the inner hole and the clearance fit hole of the floating piston 10 is a plane, the center of the plane is provided with a central hole 13, and both ends of the central hole 13 are of a bell mouth structure, so that the shearing effect caused by the violent change of the flow speed of the polymer is prevented;
the conical angle between the conical ring 16 and the cone 15 is matched and connected under the action of pressure to generate a sealing effect.
The position of the diversion hole 11 on the cone 15 is positioned above the sealing surface of the cone and the conical ring under the condition that the cone is in contact sealing with the conical ring, and the lower outlet position of the diversion hole 11 is positioned above the sealing surface of the cone 15 and the conical ring 16, so that the communication between the diversion hole 11 and the lower central hole 17 is closed.
When polymer is normally injected, liquid pressure pushes away the cone 15, the upper plane of the cone 15 is contacted with the lower plane of the inner hole of the body 6, the liquid enters the counter bore 14 through the flow guide hole 11 and then enters the central hole 13, the liquid enters the liquid outlet hole 8 through the central hole 13 and flows out, when the formation pressure is higher than the injection pressure, the liquid reversely flows to the counter bore 14 from the central hole 13, the pressure of the liquid also acts on the bottom plane of the counter bore 14 while the liquid reversely flows through the flow guide hole 11, the liquid pressure acting on the bottom plane of the counter bore drives the floating piston 10 to move downwards, the cone 15 of the floating piston 10 is contacted and sealed with the conical ring 16, because the lower outlet of the flow guide hole 11 is positioned on the contact surface of the cone 15 and the conical ring 16, the communication between the flow guide hole 11 and the lower central hole 17 is closed, and formation liquid including the liquid in the, the liquid in the stratum is prevented from carrying polymer lumps and stratum sand to enter the injection allocation device and the polymer injection pipe column to block the injection allocation tool and the packer, so that the test tool cannot be put down and a well washing channel is not communicated.
Because the utility model uses the pressure change and pressure difference above and below the central hole of the blanking plug body as the power for opening and closing the injection channel, the strong shearing action of the one-way valve structure of the spring structure on the polymer is avoided, and the cone ring structure are adopted at the same time; a bell mouth structure at two ends of the central hole; the design of the direction of the diversion holes enables the change of the flow speed and the direction of the polymer to be gradual, the degradation probability of the polymer is reduced, and the polymer flooding effect is improved.
Claims (2)
1. The utility model provides a prevent returning blanking plug, includes body (6), drags for head (1), upper bracket (2), compression spring (3), torsional spring (4), cam (5), goes out liquid hole (8) and arranges sealed recess (7) in going out liquid hole (8) both sides, its characterized in that: the lower part of the body (6) is in threaded sealing connection with a bottom cap (9), and the upper part of the bottom cap (9) is provided with a floating piston (10);
the upper part of the bottom cap (9) is in threaded sealing connection with the lower part of the body (6), the lower part of the bottom cap (9) is of a semi-sphere structure, a plurality of water distribution holes (12) are formed in the periphery of the semi-sphere, the water distribution holes (12) are communicated with a lower central hole (17) of the bottom cap, and a conical ring (16) is expanded at the top of the lower central hole (17);
the floating piston (10) is characterized in that a counter bore is formed in the center of the upper plane of the floating piston (10), the diameter of the outer circle of the floating piston (10) is in clearance fit connection with an inner hole in the lower portion of the body (6), a cone (15) is arranged on the lower portion of the floating piston (10), a plurality of flow guide holes (11) are formed in the periphery of the upper portion of the cone (15), and the flow guide holes (11) are communicated with the counter bore (14);
the upper part of an inner hole at the lower part of the body (6), which is in clearance fit with the floating piston (10), is a plane, the center of the plane is provided with a central hole (13), and both ends of the central hole (13) are of a horn mouth structure;
the conical angle of the conical ring (16) is matched and connected with the conical body (15).
2. An anti-regurgitation obstructer as claimed in claim 1, wherein: the position of the diversion hole (11) on the cone (15) is positioned on the connecting surface of the cone (15) and the conical ring (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921693138.9U CN211174039U (en) | 2019-10-11 | 2019-10-11 | Anti-reverse-spitting blanking plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921693138.9U CN211174039U (en) | 2019-10-11 | 2019-10-11 | Anti-reverse-spitting blanking plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211174039U true CN211174039U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921693138.9U Active CN211174039U (en) | 2019-10-11 | 2019-10-11 | Anti-reverse-spitting blanking plug |
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| Country | Link |
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| CN (1) | CN211174039U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116517514A (en) * | 2023-07-05 | 2023-08-01 | 大庆市璞庆钻采设备制造有限公司 | Injection anti-shearing water distributor |
-
2019
- 2019-10-11 CN CN201921693138.9U patent/CN211174039U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116517514A (en) * | 2023-07-05 | 2023-08-01 | 大庆市璞庆钻采设备制造有限公司 | Injection anti-shearing water distributor |
| CN116517514B (en) * | 2023-07-05 | 2023-09-08 | 大庆市璞庆钻采设备制造有限公司 | Injection anti-shearing water distributor |
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