CN211201862U - Forced return floating hoop for casing - Google Patents
Forced return floating hoop for casing Download PDFInfo
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- CN211201862U CN211201862U CN201920972151.1U CN201920972151U CN211201862U CN 211201862 U CN211201862 U CN 211201862U CN 201920972151 U CN201920972151 U CN 201920972151U CN 211201862 U CN211201862 U CN 211201862U
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Abstract
A forced return floating hoop for a casing comprises a body, wherein the body comprises a valve seat with a central hole, a sealing plug, the lower part of the sealing plug is fixedly connected with the upper end of an insert rod, a spring is sleeved outside the insert rod, the lower end of the insert rod penetrates through a support and is in sliding connection with the support, a first spring seat is fixedly arranged at the lower end of the sealing plug, a second spring seat integrated with the support is arranged at the upper end of the support, the upper end and the lower end of the spring are respectively and fixedly connected with the first spring seat and the second spring seat, the support is provided with a plurality of circulation holes, a casing collar is connected with a casing coupling through screw threads on the valve seat, one end of the inner wall of the casing collar is connected with a casing step, a sealing gasket is arranged at the; the thickness of the sealing washer along the radial direction of the body is larger than that of the locking sleeve; when the spring is in a natural state, the upper end face of the sealing plug is tightly attached to the lower end face of the valve seat. Through this technical scheme, sealed safe and reliable has increased the life of float collar.
Description
Technical Field
The utility model relates to a cementing tool especially relates to a sleeve pipe is with forcing return float collar.
Background
The basic function of the float collar is to prevent mud and cement slurry from flowing back. The down position of the rubber plug is controlled during cementing, and a collision signal is provided to ensure the length of the cement plug in the pipe to prevent backflow of cement slurry. However, in the prior art, the float collar is sealed by a metal or nylon ball, a sealing ring is additionally arranged on the valve seat, the valve seat and the inner diameter of the pipe body are sealed, the sealing ring is extruded during assembly, the sealing is not tight, and the float collar is also failed due to high temperature at the bottom of a well. Under the condition of complex well conditions, particularly under the condition that a large amount of rock debris and sundries exist in a well, external force is generated to deform and dislocate the well, so that the well is out of work. The structure and the processing technology are relatively complex, the cost of raw materials is high, the sealing effect is poor, and the long-time erosion resistance is not achieved. And the existing float collar valve core is closed and is only pushed by a spring to reset, so that the reliability is low. Aiming at the situations, the structure and the process of the floating collar are improved, the improved floating collar structure and the processing process are simple, the assembly is convenient, the sealing performance is greatly improved, and the field use proves that the improved floating collar has higher reliability on the well cementation quality.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned prior art exists, the utility model provides a convenient, sealed effectual sleeve pipe is with forcing return float collar of equipment, its technical scheme is:
a forced return floating hoop for a casing comprises a body, wherein the body comprises a valve seat and a sealing plug, the valve seat is provided with a central hole, the lower part of the sealing plug is fixedly connected with the upper end of an inserted rod, a spring is sleeved outside the inserted rod, the lower end of the inserted rod penetrates through a support and is in sliding connection with the support, a first spring seat is fixedly arranged at the lower end of the sealing plug, a second spring seat integrated with the support is arranged at the upper end of the support, the upper end and the lower end of the spring are respectively and fixedly connected with the first spring seat and the second spring seat, the support is provided with a plurality of circulation holes, the casing collar is connected with a casing collar through a screw thread on the valve seat, one end of the inner wall of the casing collar is connected with a casing step, a sealing gasket is arranged at the casing; the thickness of the sealing washer along the radial direction of the body is larger than that of the locking sleeve; when the spring is in a natural state, the upper end face of the sealing plug is tightly attached to the lower end face of the valve seat.
Furthermore, the middle layer of the sealing plug is an aluminum layer, and the outer layer of the aluminum layer is vulcanized with a rubber layer, so that the sealing is more reliable.
Furthermore, the contact surface of the sealing plug and the valve seat is an arc-shaped surface, so that the sealing is safer.
Furthermore, the edge of the sealing plug is a vulcanized soft rubber layer which extends downwards and far away from the central line of the body, and the edge of the sealing plug is in the shape of a tail wing.
Furthermore, the support is fixed in the middle of the inner cavity of the body, so that the inserted bar can be in the body when moving up and down.
Through this technical scheme, sealed safe and reliable, it is more convenient to draw materials, has prolonged the life of float collar, has practiced thrift manufacturing cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an enlarged schematic view of the seal plug of FIG. 1;
the sealing plug comprises a sleeve 1, a valve seat 2, a sealing washer 3, a sealing plug 4, a locking sleeve 5, a spring 6, an inserted rod 7, a support 8 and a sealing plug edge 9.
Detailed Description
As shown in fig. 1, the forced return floating collar for the casing comprises a body, wherein the body comprises a valve seat 2 provided with a central hole, a sealing plug 4, the lower part of the sealing plug 4 is fixedly connected with the upper end of an inserted rod 7, a spring 6 is sleeved outside the inserted rod 7, the lower end of the inserted rod 7 penetrates through a support 8 and is in sliding connection with the support 8, the lower end of the sealing plug 4 is fixedly provided with a first spring seat, the upper end of the support 8 is provided with a second spring seat integrated with the support, the upper end and the lower end of the spring 6 are respectively and fixedly connected with the first spring seat and the second spring seat, the support 8 is provided with a plurality of circulation holes, and the total area of the circulation holes is not less than 70% of the; the valve seat 2 is in threaded connection with the sleeve collar, one end of the inner wall of the sleeve collar is connected with the sleeve, the sleeve step is arranged at one end of the sleeve, a sealing washer 3 is arranged at the position close to the sleeve step of the valve seat 2, a locking sleeve 5 is clamped between the sealing washer 3 and the support 8, and the locking sleeve 5 is attached to the inner wall of the body; the thickness of the sealing washer 3 along the radial direction of the body is larger than that of the locking sleeve 5; when the spring 6 is in a natural state, the upper end surface of the sealing plug 4 is tightly attached to the lower end surface of the valve seat 2.
The middle layer of the sealing plug 4 is an aluminum layer, and the outer layer of the aluminum layer is vulcanized with a rubber layer, so that the sealing is more reliable; the contact surface of sealing plug 4 and disk seat 2 is the arcwall face, support 8 is fixed in the inner chamber middle part of body.
The sealing plug edge 9 is a vulcanized soft rubber layer which extends downwards and far away from the center line of the body, and the sealing plug edge 9 is in the shape of a tail wing.
The working principle is as follows: when cement is injected from the upper part, the cement flows from the central hole of the valve seat to the upper end of the sealing plug 4, under the pressure, the sealing plug presses the lower spring and the inserted rod downwards, the inserted rod drives the sealing plug to move downwards, and because the thickness of the sealing gasket along the radial direction of the body is larger than that of the locking sleeve, a gap is reserved between the edge of the sealing plug and the locking sleeve, and simultaneously because the edge of the sealing plug is a soft rubber layer, under the pressure of the cement, the edge of the sealing plug faces downwards, so that the gap is increased, and the cement can be injected into the well downwards through the circulation hole of the bracket along with the increased gap between the edge of the sealing;
when the inserted bar drives the sealing plug to move downwards to a designated position, the inserted bar and the sealing plug move upwards under the pressure of spring force and underground slurry, and meanwhile, because the edge of the sealing plug is a soft rubber layer, the underground slurry impacts the lower end of the sealing plug, so that the edge of the sealing plug extends, a gap between the edge of the sealing plug and a locking sleeve is reduced, the moving speed of the sealing plug is accelerated until the sealing plug is in close contact with a valve seat, the edge of the sealing plug is in lap joint with a sealing gasket, cement or slurry is prevented from flowing backwards, and good sealing is realized.
The above description is only exemplary of the present invention, and those skilled in the art can modify the present invention or modify it into equivalent technical solutions by using the technical solutions described above. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.
Claims (4)
1. The utility model provides a sleeve pipe is with forcing return float collar, includes the body, its characterized in that: the body comprises a valve seat with a central hole and a sealing plug, the lower part of the sealing plug is fixedly connected with the upper end of an inserted rod, a spring is sleeved outside the inserted rod, the lower end of the inserted rod penetrates through the support and is in sliding connection with the support, the lower end of the sealing plug is fixedly provided with a first spring seat, the upper end of the support is provided with a second spring seat integrated with the support, the upper end and the lower end of the spring are respectively and fixedly connected with the first spring seat and the second spring seat, the support is provided with a plurality of circulation holes, the valve seat is screwed and connected with a casing collar, one end of the inner wall of the casing collar is connected with a casing step, a sealing washer is arranged at the casing step close to the valve seat, a locking sleeve is clamped between; the thickness of the sealing washer along the radial direction of the body is larger than that of the locking sleeve; when the spring is in a natural state, the upper end face of the sealing plug is tightly attached to the lower end face of the valve seat, the edge of the sealing plug is a vulcanized soft rubber layer which extends downwards and towards the central line far away from the body, and the edge of the sealing plug is in the shape of a tail wing.
2. The forced-return float collar for casing of claim 1, wherein: the middle layer of the sealing plug is an aluminum layer, and the outer layer of the aluminum layer is vulcanized with a rubber layer.
3. The forced-return float collar for casing of claim 1, wherein: the contact surface of the sealing plug and the valve seat is an arc surface.
4. The forced-return float collar for casing of claim 1, wherein: the bracket is fixed in the middle of the inner cavity of the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920972151.1U CN211201862U (en) | 2019-06-26 | 2019-06-26 | Forced return floating hoop for casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920972151.1U CN211201862U (en) | 2019-06-26 | 2019-06-26 | Forced return floating hoop for casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211201862U true CN211201862U (en) | 2020-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920972151.1U Active CN211201862U (en) | 2019-06-26 | 2019-06-26 | Forced return floating hoop for casing |
Country Status (1)
| Country | Link |
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| CN (1) | CN211201862U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522891A (en) * | 2022-11-23 | 2022-12-27 | 大庆市宏博晟达石油机械设备有限公司 | Float collar float shoe applied to oil field well cementation construction |
| CN116498258A (en) * | 2023-06-29 | 2023-07-28 | 胜利油田渤海固井工程技术有限责任公司 | Floating collar floating shoe with backflow preventing function for well cementation construction |
-
2019
- 2019-06-26 CN CN201920972151.1U patent/CN211201862U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522891A (en) * | 2022-11-23 | 2022-12-27 | 大庆市宏博晟达石油机械设备有限公司 | Float collar float shoe applied to oil field well cementation construction |
| CN115522891B (en) * | 2022-11-23 | 2023-02-03 | 大庆市宏博晟达石油机械设备有限公司 | Float collar float shoe applied to oil field well cementation construction |
| CN116498258A (en) * | 2023-06-29 | 2023-07-28 | 胜利油田渤海固井工程技术有限责任公司 | Floating collar floating shoe with backflow preventing function for well cementation construction |
| CN116498258B (en) * | 2023-06-29 | 2023-08-22 | 胜利油田渤海固井工程技术有限责任公司 | Floating collar floating shoe with backflow preventing function for well cementation construction |
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Legal Events
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| TR01 | Transfer of patent right |
Effective date of registration: 20230420 Address after: 257200 Gujing Lane, Heyi Road, Dongying City, Shandong Province Patentee after: SHENGLI OILFIELD BOHAI CEMENTING ENGINEERING TECHNOLOGY Co.,Ltd. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Address before: 257200 Gujing Lane, Heyi Road, Dongying City, Shandong Province Patentee before: SHENGLI OILFIELD BOHAI CEMENTING ENGINEERING TECHNOLOGY Co.,Ltd. |