CN203383778U - Piston type self-locking float collar - Google Patents
Piston type self-locking float collar Download PDFInfo
- Publication number
- CN203383778U CN203383778U CN201320510641.2U CN201320510641U CN203383778U CN 203383778 U CN203383778 U CN 203383778U CN 201320510641 U CN201320510641 U CN 201320510641U CN 203383778 U CN203383778 U CN 203383778U
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- Prior art keywords
- piston
- pressure block
- float collar
- pressure bearing
- spring
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- Expired - Fee Related
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Abstract
The utility model relates to a piston type self-locking float collar which mainly solves the problem that an existing float collar in the prior art cannot meet the requirement for use of a floating running casing tool in a horizontal well under the conditions of high temperature and high pressure. The piston type self-locking float collar is characterized in that a pressure bearing base inner sleeve is arranged inside a pressure bearing base, a retaining ring is arranged at the upper portion of the pressure bearing base and the upper portion of the pressure bearing base inner sleeve, the retaining ring is clamped in a clamping groove at the upper end of a body, a clamp spring is arranged between the body and the pressure bearing base, and the clamp spring corresponds to a clamp spring groove of the body. A spool base is arranged at the position of a boss at the lower end of the body, a limiting sleeve is arranged at the upper portion of the spool base, a piston is arranged in a body inner cavity, the upper portion of the piston is arranged in the pressure bearing base inner sleeve, the lower end of the piston is sleeved with a spring, a correcting sleeve is arranged outside the spring and is connected with the bottom end of the piston through a limiting pin, and the spring is arranged at the upper portion of the limiting pin. The piston type self-locking float collar can achieve reverse pressure bearing, reduce erosion of fluid to the piston and ensure a seal effect.
Description
Technical field
The utility model relates to a kind of float collar in the petroleum drilling engineering technical field, particularly a kind of piston type self-locking float collar.
Background technology
Float collar is in well cementing process, play a kind of instrument of reverse throttling, application due to HTHP oil base mud, cause existing float collar can't meet the technological requirement of using floating casing appliances under high-temperature and high-pressure conditions in horizontal well, HTHP oil base mud can cause corrosion to the rubber on float collar, makes its inefficacy can't complete the function of reverse pressure-bearing.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the existing float collar existed in background technology can't meet the problem of using floating casing appliances under high-temperature and high-pressure conditions in horizontal well, and provide a kind of piston type self-locking float collar, this piston type self-locking float collar, can reach reverse pressure-bearing, reduce the erosion of fluid to piston, guarantee sealing effectiveness.
The invention for solving the technical problem can reach by following technical solution: this piston type self-locking float collar, comprise body, Pressure Block, described body is connected by cutting off with Pressure Block, described Pressure Block inside is equipped with the Pressure Block inner sleeve, Pressure Block and Pressure Block inner sleeve top are equipped with back-up ring, back-up ring is stuck in the draw-in groove of body upper end, between body and Pressure Block, is equipped with jump ring, and jump ring is corresponding with the jump-ring slot of body; Boss place, body lower end is equipped with valve core case, and valve core case top is equipped with stop collar, and chamber body is equipped with piston, piston top is placed in Pressure Block inner sleeve inside, and the piston lower end is equipped with spring, and the spring outside is equipped with supporting positive cover, supporting positive cover is connected with piston bottom end by spacer pin, and spring is placed in spacer pin top.
The utility model is compared and can be had following beneficial effect with the above-mentioned background technology: this piston type self-locking float collar is owing to adopting said structure, employing cuts off and spring mechanism, with piston, matches, and reaches reverse pressure-bearing, reduces the erosion of fluid to piston, guarantee sealing effectiveness, improve cementing quality.Support the use with floating casing appliances, guaranteed the application of the floating instrument of horizontal well in large vertical depth horizontal well.
the accompanying drawing explanation:
Accompanying drawing 1 is structural representation of the present utility model.
In figure: 1-body, 2-Pressure Block, 3-Pressure Block inner sleeve, 4-piston, 5-stop collar, 6-supporting positive cover, 7-spring, 8-valve core case, 9-spacer pin, 10-jump ring, 11-cut off, the 12-back-up ring.
the specific embodiment:
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, this piston type self-locking float collar comprises body 1, Pressure Block 2, described body 1 is connected by cutting off 11 with Pressure Block 2, Pressure Block 2 inside are equipped with Pressure Block inner sleeve 3, Pressure Block 2 and Pressure Block inner sleeve 3 tops are equipped with back-up ring 12, back-up ring 12 is stuck in body 1 upper end draw-in groove, and 2 of body 1 and Pressure Blocks are equipped with jump ring 10, and jump ring 10 is corresponding with the jump-ring slot of body 1; Body 1 boss place, lower end is equipped with valve core case 8, valve core case 8 tops are equipped with stop collar 5, body 1 inner chamber is equipped with piston 4, piston 4 tops are placed in Pressure Block inner sleeve 3 inside, piston 4 lower ends are equipped with spring 7, spring 7 outsides are equipped with supporting positive cover 6, and supporting positive cover 6 is connected with piston 4 bottoms by spacer pin 9, and spring 7 is placed in spacer pin 9 tops.Described body 1 and Pressure Block 2, Pressure Block 2 and 3 of Pressure Block inner sleeves are equipped with sealing ring.
While carrying out well cementing operation, body 1 connects with the completion tubular series winding, when floating casing appliances is opened, runner is unimpeded, and generation builds the pressure, by cutting off spacer pin 9, piston 4 is descending, opens runner, carries out normal well cementation circulation, after circulation completes, be lowered to plug, bruising is cut off and is cut off 11, closing tool, jump ring 10 enters jump-ring slot, completes self-locking.
Claims (2)
1. a piston type self-locking float collar, comprise body (1), Pressure Block (2), described body (1) is connected by cutting off (11) with Pressure Block (2), it is characterized in that: described Pressure Block (2) inside is equipped with Pressure Block inner sleeve (3), Pressure Block (2) and Pressure Block inner sleeve (3) top are equipped with back-up ring (12), back-up ring (12) is stuck in the draw-in groove of body (1) upper end, be equipped with jump ring (10) between body (1) and Pressure Block (2), jump ring (10) is corresponding with the jump-ring slot of body (1); Boss place, body (1) lower end is equipped with valve core case (8), valve core case (8) top is equipped with stop collar (5), body (1) inner chamber is equipped with piston (4), piston (4) top is placed in Pressure Block inner sleeve (3) inside, piston (4) lower end is equipped with spring (7), spring (7) outside is equipped with supporting positive cover (6), and supporting positive cover (6) is connected with piston (4) bottom by spacer pin (9), and spring (7) is placed in spacer pin (9) top.
2. piston type self-locking float collar according to claim 1, is characterized in that: between described body (1) and Pressure Block (2), Pressure Block (2) and Pressure Block inner sleeve (3), be equipped with sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320510641.2U CN203383778U (en) | 2013-08-21 | 2013-08-21 | Piston type self-locking float collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320510641.2U CN203383778U (en) | 2013-08-21 | 2013-08-21 | Piston type self-locking float collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203383778U true CN203383778U (en) | 2014-01-08 |
Family
ID=49872287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320510641.2U Expired - Fee Related CN203383778U (en) | 2013-08-21 | 2013-08-21 | Piston type self-locking float collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203383778U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239958A (en) * | 2015-10-29 | 2016-01-13 | 中国石油集团渤海钻探工程有限公司 | Novel bumping-and-pressing-type float collar |
-
2013
- 2013-08-21 CN CN201320510641.2U patent/CN203383778U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105239958A (en) * | 2015-10-29 | 2016-01-13 | 中国石油集团渤海钻探工程有限公司 | Novel bumping-and-pressing-type float collar |
| CN105239958B (en) * | 2015-10-29 | 2017-07-18 | 中国石油集团渤海钻探工程有限公司 | A kind of new impact pressing floating hoop |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20170821 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |