CN217632374U - Special float valve for coiled tubing - Google Patents
Special float valve for coiled tubing Download PDFInfo
- Publication number
- CN217632374U CN217632374U CN202221577646.2U CN202221577646U CN217632374U CN 217632374 U CN217632374 U CN 217632374U CN 202221577646 U CN202221577646 U CN 202221577646U CN 217632374 U CN217632374 U CN 217632374U
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- valve body
- clapper
- sealing ring
- inner cavity
- rubber button
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Abstract
The utility model relates to a special float valve for a continuous oil pipe, which comprises a valve body, wherein at least one annular groove is arranged at the periphery of one end of the valve body, an outer sealing ring and a retainer ring are arranged in the annular groove, and the outer sealing ring is arranged between the two retainer rings; a step groove is arranged in the inner cavity of the valve body, a clapper sealing ring is arranged at the step groove through a fixing ring, a clapper for opening and closing the inner cavity of the valve body is rotatably arranged on the valve body close to the clapper sealing ring, and the clapper is rotatably arranged on the valve body through an opening and closing unit; the opening and closing unit comprises a torsion spring, a pin shaft, an upper rubber button and a lower rubber button. The utility model has the advantages that: the maximum flow area through the valve body interior reduces unnecessary back pressure to the surface pump. The flow path passing through the inner cavity of the valve body does not limit the passing of the steel ball or the starting plug when required in the operations of drilling, cementing, well completion and the like.
Description
Technical Field
The utility model relates to a special floating valve of coiled tubing belongs to the floating valve field.
Background
The coiled tubing is a movable and hydraulically driven device, is widely applied to a plurality of fields of well repair, acidification, fracturing, perforation, well logging, well completion, well drilling, plugging removal and dredging of ground oil and gas pipelines and the like in oil and gas fields at present, is particularly applied to operations such as pressurized operation, well logging and perforation of horizontal wells and highly-deviated wells, well completion and the like, and is known as universal operation equipment.
The special float valve for the coiled tubing is used in a coiled tubing adapter and can well play a role in internal blowout prevention during coiled tubing operation. Most of valve bodies of the special float valves for the coiled tubing at home and abroad adopt split structures, the assembly process is relatively complicated, and the working efficiency is reduced. Secondly, the sealing position of the inner cavity adopts a structure that the clapper is made into a cone and directly forms metal-metal hard seal with the cone cavity of the valve body, and the sealing surfaces matched with the clapper and the cone cavity are slightly worn and damaged in the working process, so that the sealing failure is easily caused, and even safety accidents can be caused.
SUMMERY OF THE UTILITY MODEL
For overcoming the defects of the prior art, the utility model provides a special float valve of continuous oil pipe, the technical scheme of the utility model is that:
a special float valve for a continuous oil pipe comprises a valve body, wherein at least one annular groove is formed in the periphery of one end of the valve body, an outer sealing ring and a check ring are installed in the annular groove, and the outer sealing ring is installed between the two check rings; a step groove is arranged in the inner cavity of the valve body, a clapper sealing ring is arranged at the step groove through a fixing ring, a clapper for opening and closing the inner cavity of the valve body is rotatably arranged on the valve body close to the clapper sealing ring, and the clapper is rotatably arranged on the valve body through an opening and closing unit; the opening and closing unit comprises a torsion spring, a pin shaft, an upper rubber button and a lower rubber button, the clapper is rotatably arranged on the valve body through the pin shaft, one end of the torsion spring is connected with the valve body through the upper rubber button, the other end of the torsion spring is connected with the clapper through the lower rubber button, and the upper rubber button is embedded into a groove of the valve body.
When a ball is thrown or the plug is started, the clapper in the inner cavity of the valve body is pressed by the outside to open the clapper; when the ball throwing and the starting plug are finished or the underground pressure exceeds a preset value, the clapper is closed under the reset action of the torsion spring, and at the moment, the clapper is tightly matched with the clapper sealing ring to close the inner cavity of the valve body.
The fixing ring for fixing the clapper sealing ring is tightly matched with the inner cavity of the valve body and is tightly matched with the clapper sealing ring.
The annular grooves are arranged twice, and a space is formed between the two annular grooves.
The utility model has the advantages that:
the maximum flow area through the valve body interior reduces unnecessary back pressure to the surface pump. The flow path passing through the inner cavity of the valve body does not limit the passing of the steel ball or the starting plug when required in the operations of drilling, cementing, well completion and the like. The valve body is integrally designed, the strength is high, and the sealing effect is stable and reliable; a full bore fluid passage for the steel ball and the start plug; simple structure, the maintenance is swift, the change of easily valves.
Drawings
Fig. 1 is a schematic view of the main structure of the present invention.
Fig. 2 is a schematic view of the usage state of the present invention.
Detailed Description
The invention will be further described with reference to specific embodiments, the advantages and features of the invention will become more apparent as the description proceeds. These examples are merely illustrative and do not limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications are intended to be included within the scope of the invention.
Referring to fig. 1 and 2, the utility model relates to a special float valve P for coiled tubing, which comprises a valve body 1, wherein at least one annular groove is arranged at the periphery of one end of the valve body 1, an outer sealing ring 9 and a retainer ring 10 are arranged in the annular groove, and the outer sealing ring 9 is arranged between the two retainer rings 10; a step groove is arranged in the inner cavity of the valve body, a clapper sealing ring 6 is arranged at the step groove through a fixing ring 7, a clapper 2 for opening and closing the inner cavity of the valve body is rotatably arranged on the valve body 1 close to the clapper sealing ring 6, and the clapper 2 is rotatably arranged on the valve body 1 through an opening and closing unit; the opening and closing unit comprises a torsion spring 4, a pin shaft 5, an upper rubber button 8 and a lower rubber button 3, the clapper 2 is rotatably installed on the valve body 1 through the pin shaft 5, one end of the torsion spring 4 is connected with the valve body through the upper rubber button 8, the other end of the torsion spring is connected with the clapper 2 through the lower rubber button 3, and the upper rubber button 8 is embedded into a groove of the valve body 1.
When a ball is thrown or the plug is started, the clapper in the inner cavity of the valve body is pressed by the outside to open the clapper; when the ball is thrown (the steel ball 11), the starting plug is finished or the underground pressure exceeds a preset value, the clapper 2 is closed under the reset action of the torsion spring 4, and at the moment, the clapper 2 is tightly matched with the clapper sealing ring 6 to close the inner cavity of the valve body.
The fixing ring 7 for fixing the clapper sealing ring 6 is tightly matched with the inner cavity of the valve body and is tightly matched with the clapper sealing ring 6 to realize the sealing effect, and the surface of the clapper and the positioning ring can further form metal type sealing when the pressure is reversed and high.
The annular grooves are arranged twice, and a space is formed between the two annular grooves.
The utility model discloses a theory of operation is:
when a ball or other starting plugs are thrown in the process of operation such as well drilling, well cementing, well completion and the like, the clapper is opened by applying pressure to the inner cavity of the valve body channel and the outside so as to complete subsequent work. When the ball throwing or the starting plug is finished or the underground pressure is too high, the clapper is reset along with the torsion spring, and the clapper is closed to play an internal blowout prevention role. A double-outer sealing system (two annular grooves, each annular groove is provided with an outer sealing ring and a check ring) is adopted, and the safety is improved. The clapper sealing ring plays a role of low-pressure sealing, and the surface of the clapper and the positioning ring form metal type sealing at high pressure.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (3)
1. A special float valve for a continuous oil pipe comprises a valve body and is characterized in that at least one annular groove is formed in the periphery of one end of the valve body, an outer sealing ring and a check ring are installed in the annular groove, and the outer sealing ring is installed between the two check rings; a step groove is arranged in the inner cavity of the valve body, a clapper sealing ring is arranged at the step groove through a fixing ring, a clapper for opening and closing the inner cavity of the valve body is rotatably arranged on the valve body close to the clapper sealing ring, and the clapper is rotatably arranged on the valve body through an opening and closing unit; the opening and closing unit comprises a torsion spring, a pin shaft, an upper rubber button and a lower rubber button, the clapper is rotatably installed on the valve body through the pin shaft, one end of the torsion spring is connected with the valve body through the upper rubber button, the other end of the torsion spring is connected with the clapper through the lower rubber button, and the upper rubber button is embedded into a groove of the valve body.
2. The float valve special for the coiled tubing according to claim 1, wherein a fixing ring for fixing the clapper sealing ring is tightly matched with the inner cavity of the valve body and is tightly matched with the clapper sealing ring.
3. The coiled tubing specific float valve of claim 1, wherein there are two of said annular grooves, and a space is formed between two of said annular grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221577646.2U CN217632374U (en) | 2022-06-22 | 2022-06-22 | Special float valve for coiled tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221577646.2U CN217632374U (en) | 2022-06-22 | 2022-06-22 | Special float valve for coiled tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217632374U true CN217632374U (en) | 2022-10-21 |
Family
ID=83629170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221577646.2U Active CN217632374U (en) | 2022-06-22 | 2022-06-22 | Special float valve for coiled tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217632374U (en) |
-
2022
- 2022-06-22 CN CN202221577646.2U patent/CN217632374U/en active Active
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