CN204738782U - Piston float collar float shoe - Google Patents
Piston float collar float shoe Download PDFInfo
- Publication number
- CN204738782U CN204738782U CN201520455910.9U CN201520455910U CN204738782U CN 204738782 U CN204738782 U CN 204738782U CN 201520455910 U CN201520455910 U CN 201520455910U CN 204738782 U CN204738782 U CN 204738782U
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- inner chamber
- internal valve
- piston
- hypomere
- float
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Abstract
The utility model discloses a piston float collar float shoe, including body and internal valve, internal valve cavity forms the inner chamber and its bottom is sealed by the orifice plate, is equipped with the outage on the orifice plate, the upper segment and the body sealing connection of internal valve, the external diameter of its hypomere is less than the internal diameter of body, the diameter of the upper and lower section inner chamber of internal valve is that the upper segment inner chamber is little in the junction, the interior intracavity of internal valve hypomere is equipped with the piston that can freely slide, piston and inner chamber sealing connection, and be equipped with the spring between its and the orifice plate, the upside edge of piston is equipped with the annular arch, the top at internal valve hypomere inner chamber that corresponds is equipped with and holds the bellied annular groove of this annular, still be equipped with the axial seal device in the annular groove, the internal valve hypomere is close to its junction with the upper segment and is equipped with a plurality of circulation holes along its circumference, when the piston was closed, the circulation hole was closed. This piston float collar float shoe hides sealing element outside mud circulation canal, can not washed out to improve the life of float collar float shoe by a wide margin.
Description
Technical field
The utility model belongs to cementing tool field, particularly relates to a kind of piston type float collar float plug.
Background technology
Float collar float plug is cementing tool the most frequently used in cementing operation, and currently used form mainly comprises Spring driving, hyoplastron and ball float three kinds of forms.Conventional float collar float plug all requires that its inner member has good drillability, so that the needs of later stage operation, therefore for ensureing that it has good drillability, cannot adopt the better material of abrasion resistance.Its potted component of float collar float plug of above-mentioned three kinds of forms is all exposed in mud circulation passage, and therefore abrasion resistance is poor.The sealing mechanism of float collar float plug, once be destroyed, cannot be formed and effectively seal, and cause the serious well cementation accident of " sausage-filling ".And once back pressure valve is malfunctioning, cement paste produces flowing in bonding process, directly will affect cementing quality, even cause cementing operation failure, heavy then whole mouth well will be caused to scrap.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of piston type float collar float plug, is hidden in by potted component outside mud circulation passage, by erosion, thus can not significantly improve the application life of float collar float plug.
For this reason, the technical solution of the utility model is as follows:
A kind of piston type float collar float plug, comprises body and internal valve, and described internal valve hollow forms inner chamber and the bottom of inner chamber is closed by orifice plate, and described orifice plate is provided with one or more outage; Epimere and the body of described internal valve are tightly connected, and the external diameter of its hypomere is less than the internal diameter of body, and forms runner between body; The diameter of described internal valve upper and lower section of inner chamber is that epimere intracavity diameter is less than hypomere intracavity diameter in junction; Be provided with the piston that can be free to slide in the inner chamber of described internal valve hypomere, described piston is connected with bore seal, and is provided with spring between itself and orifice plate; The upper edge place of described piston is provided with annular protrusion; Corresponding is provided with the annular groove holding this annular protrusion at the top of internal valve hypomere inner chamber; Also axial sealer is provided with, for realizing the sealing of piston and inner chamber when piston is closed in described annular groove; Described internal valve hypomere is circumferentially with multiple circulation port near the junction of itself and epimere along it; When described piston is closed, circulation port is closed.
The structure of described internal valve epimere inner chamber is upside is be cylinder on the downside of circular cone, forms axial circulation passage.
The middle part of described internal valve hypomere intracavity sidewall is formed with limited step, prevents piston from being Compress Spring under normal conditions, reduces the application life of spring.After described piston is placed on limited step, the upper surface of its annular protrusion is positioned under circulation port along following position.
The sealing of described piston and inner chamber relies on O RunddichtringO to realize.
An O RunddichtringO is provided with, for realizing being tightly connected of internal valve and body between the epimere of described internal valve and body.
Described axial sealer is O shape sealing mat, W shape sealing mat or v-seal pad.
Potted component is hidden in outside mud circulation passage by this piston type float collar float plug, mud circulation effectively can be avoided to carry out erosion attack to the potted component of float collar float plug, thus significantly improve the application life of float collar float plug.
Accompanying drawing explanation
The opening figure of the piston type float collar float plug that Fig. 1 provides for the utility model;
The closed condition figure of the piston type float collar float plug that Fig. 2 provides for the utility model.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, structure of the present utility model is described in detail.
As shown in Figure 1, 2, a kind of piston type float collar float plug, comprises body 1 and internal valve 2, and internal valve 2 hollow forms inner chamber 10 and the bottom of inner chamber 10 is closed by orifice plate 8, and orifice plate 8 is provided with one or more outage 14; Epimere and the body 1 of internal valve 2 are tightly connected, and are generally utilize O RunddichtringO 9 to seal; The external diameter of internal valve hypomere is less than the internal diameter of body 1, and forms runner between body 1; The diameter of internal valve upper and lower section of inner chamber 11,12 is that epimere inner chamber 11 diameter is less than hypomere inner chamber 12 diameter in junction; Be provided with the piston 6 that can be free to slide in the hypomere inner chamber 12 of internal valve, piston 6 and inner chamber 10 are tightly connected, and generally take the mode installing O RunddichtringO between piston 6 and inner chamber 10 additional to seal; Spring 7 is provided with between piston 6 and orifice plate 8; The upper edge place of piston 6 is provided with annular protrusion; Corresponding is provided with the annular groove holding this annular protrusion at the top of internal valve hypomere inner chamber 12; Be provided with axial sealer 3 in annular groove, this axial sealer 3 can be O shape sealing mat, W shape sealing mat or v-seal pad; Internal valve hypomere is circumferentially with multiple circulation port 5 near the junction of itself and epimere along it; When piston is closed, circulation port 5 is closed.
In an embodiment of the present utility model, the structure of internal valve epimere inner chamber 11 is upside is be cylinder on the downside of circular cone.
In an embodiment of the present utility model, the middle part of internal valve hypomere inner chamber 12 sidewall is formed with limited step 13, prevents piston from being Compress Spring under normal conditions, reduces the application life of spring.Circulation port 5 times is positioned at along following position when piston 6 is placed in the upper surface of its annular protrusion after on limited step 13.
Left side is under upper, right side is in Fig. 1,2, during use, mud enters from body 1 upper end of this piston type float collar float plug, retains after then flowing into the epimere inner chamber 11 of internal valve 2 through piston 6, flow out internal valve 2 from circulation port 5, flow into the runner between internal valve 2 hypomere and body 1.Mud stops feeding moment, and in body 1, pressure is greater than pressure in internal valve 2, and mud pours in the hypomere inner chamber 12 of internal valve 2 through outage 14 instantaneously, promotes piston 6 and upwards embeds to its annular protrusion in the annular groove of internal valve 2.
Axial sealer and the sealing between piston and internal valve are not all arranged on mud runner, effectively prevent the potted component of float collar float plug by erosion, as long as one is not destroyed will form effective sealing, thus extends the application life of float collar float plug, effectively improve cementing quality.
Claims (6)
1. a piston type float collar float plug, comprise body (1) and internal valve (2), it is characterized in that: described internal valve (2) hollow forms inner chamber (10) and the bottom of inner chamber (10) is closed by orifice plate (8), and described orifice plate (8) is provided with one or more outage (14); Epimere and the body (1) of described internal valve (2) are tightly connected, and the external diameter of its hypomere is less than the internal diameter of body (1), and forms runner between body (1); The diameter of described internal valve upper and lower section of inner chamber (11,12) is that epimere inner chamber (11) diameter is less than hypomere inner chamber (12) diameter in junction; The piston (6) that can be free to slide is provided with in the hypomere inner chamber (12) of described internal valve, described piston (6) and inner chamber (10) are tightly connected, and are provided with spring (7) between itself and orifice plate (8); The upper edge place of described piston (6) is provided with annular protrusion; Corresponding is provided with the annular groove holding this annular protrusion at the top of internal valve hypomere inner chamber (12); Axial sealer (3) is provided with in described annular groove; Described internal valve hypomere is circumferentially with multiple circulation port (5) near the junction of itself and epimere along it; When described piston is closed, circulation port (5) is closed.
2. piston type float collar float plug as claimed in claim 1, is characterized in that: the structure of described internal valve epimere inner chamber (11) is upside is be cylinder on the downside of circular cone.
3. piston type float collar float plug as claimed in claim 1, it is characterized in that: the middle part of described internal valve hypomere inner chamber (12) sidewall is formed with limited step (13), when described piston (6) be placed in limited step (13) upper after the upper surface of its annular protrusion be positioned under circulation port (5) along following position.
4. piston type float collar float plug as claimed in claim 1, is characterized in that: be provided with O RunddichtringO (4) between described piston (6) and inner chamber (10).
5. piston type float collar float plug as claimed in claim 1, is characterized in that: be provided with an O RunddichtringO (9) between the epimere of described internal valve and body (1).
6. piston type float collar float plug as claimed in claim 1, is characterized in that: described axial sealer (3) is O shape sealing mat, W shape sealing mat or v-seal pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520455910.9U CN204738782U (en) | 2015-06-29 | 2015-06-29 | Piston float collar float shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520455910.9U CN204738782U (en) | 2015-06-29 | 2015-06-29 | Piston float collar float shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204738782U true CN204738782U (en) | 2015-11-04 |
Family
ID=54420523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520455910.9U Active CN204738782U (en) | 2015-06-29 | 2015-06-29 | Piston float collar float shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204738782U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948135A (en) * | 2015-06-29 | 2015-09-30 | 中国石油集团渤海钻探工程有限公司 | Piston type float collar float shoe |
-
2015
- 2015-06-29 CN CN201520455910.9U patent/CN204738782U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948135A (en) * | 2015-06-29 | 2015-09-30 | 中国石油集团渤海钻探工程有限公司 | Piston type float collar float shoe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210716 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106 Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
| TR01 | Transfer of patent right |