CN202866744U - Flow restricting self-filling float collar for manifold cycles - Google Patents
Flow restricting self-filling float collar for manifold cycles Download PDFInfo
- Publication number
- CN202866744U CN202866744U CN 201220351731 CN201220351731U CN202866744U CN 202866744 U CN202866744 U CN 202866744U CN 201220351731 CN201220351731 CN 201220351731 CN 201220351731 U CN201220351731 U CN 201220351731U CN 202866744 U CN202866744 U CN 202866744U
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- Prior art keywords
- valve seat
- valve
- flow restricting
- current
- sleeve
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- Expired - Fee Related
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Abstract
A flow restricting self-filling float collar for manifold cycles mainly comprises a body, a valve seat, a seal ring, a flow restricting circulatory sleeve, a floating ball, a valve cap, a valve cap spring, a shear pin, a sealing gasket and the like, and is characterized in that the flow restricting circulatory sleeve is mounted in a central hole at the lower end of the valve seat, and is fixed with the valve seat through the shear pin; the floating ball is arranged between the upper baffle and the lower baffle of the flow restricting circulatory sleeve; the valve cap is connected with the valve seat through a pin shaft; and the valve cap spring is mounted between the pin shaft and the valve cap. During the lowering of a casing pipe, the valve cap is propped open through the flow restricting circulatory sleeve, so that the flow restricting self-filling function is realized, and midway circulation is realized without impacting flow restricting self-filling. After the lowering of the casing pipe, the flow restricting circulatory sleeve is shorn off, the shear pin moves downwards, and a large passage is opened due to high flow rate circulation; moreover, the valve cap is in tight contact with the inner conical surface at the lower part of the valve seat under the action of the spring force of the valve cap spring, and a one-way valve only allows fluid to flow downwards is formed. Therefore, cement paste cannot return after well cementation.
Description
Affiliated technical field
The utility model relates to the Cementing instrument, particularly a kind of current-limiting self fill-up type that can repeatedly circulate of oil drilling cementing operation operation middle sleeve substructure.
Background technology
The float collar that at present cementing operation operation is used in bunch tube is current-limiting self fill-up type mostly.This float collar can be from filling with in the setting of casing process, when after setting of casing meets with obstruction circulating mud, this float collar will be broken can be from the pattern of filling with, just again can not be from mud grouting when continuing setting of casing, bring many inconvenience to construction, especially in the construction of deep-well, its weak point is more obvious.
The utility model content
In order to overcome the deficiencies in the prior art part, the utility model provides a kind of current-limiting self fill-up type that can repeatedly circulate.
The technical scheme that its technical problem that solves the utility model adopts is: this float collar mainly by body 1, valve seat 2, sealing ring 3, current limliting circulating sleeve 4, ball float 5, valve gap 6, valve gap spring 7, cut off 11, sealing mat 12 etc. forms, it is characterized in that: the lower end centre bore of valve seat 2 is equipped with current limliting circulating sleeve 4 and fixing with valve seat 2 by cutting off 11 from bottom to top, between the upper lower baffle plate of current limliting circulating sleeve 4, ball float 5 is arranged, valve gap 6 links by bearing pin 14 and valve seat 2, and valve gap spring 7 is installed in bearing pin and valve cover chamber.
Current limliting circulating sleeve 4 is cylindrical shells that upper lower baffle plate, lower diameter arranged greatly and have some apertures in lower side.
There is a macropore at the overhead gage center, in the outside of macropore several apertures is arranged; There is a macropore at the lower baffle plate center, also can be processed into equally with overhead gage, has outside aperture.
Mode and body that valve seat adopts traditional screw thread to tighten link.
Valve seat adopts fixed form and the body of piecing together ring 8, jump ring 9, assembly ring bearing circle 10 to link.In order to improve the Success rate of virus isolation of current limliting circulating sleeve and valve seat, current limliting circulating sleeve 4 is connected to the conical surface with valve seat 2 endoporus and is connected.
The beneficial effects of the utility model are, compared with prior art, can not can repeatedly circulate when setting of casing is hampered from the problem of filling with after this utility model has solved conventional self-filling-type float collar and circulates midway, still have from the ability of filling with when continuing setting of casing.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the complete section structural representation of a kind of current-limiting self fill-up type that can repeatedly circulate of the utility model.
Fig. 2 is the complete section structural representation of another structure of the utility model.
1. bodies among the figure, 2. valve seat, 3. sealing ring, 4. current limliting circulating sleeve, 5. ball float, 6. valve gap, 7. the valve gap spring is 8. pieced together ring, and 9. jump ring is 10. pieced together the ring bearing circle, and 11. cut off, 12. sealing mats, 13. balls, 14. bearing pins.
The specific embodiment
In Fig. 1, Fig. 2, body 1 has the box that links with the bunch tube pin thread for the upper end, the lower end has and the link hollow circular cylinder of pin thread of bunch tube box, valve seat 2, valve seat employing dual mode and body are installed in the hole within it to link, a kind of is the mode that traditional screw thread is tightened, a kind of is to use the fixed form of piecing together ring 8, jump ring 9, assembly ring bearing circle 10, relies on sealing ring and the sealing of body endoporus on the external cylindrical surface.Current limliting circulating sleeve 4 is cylinders that upper lower baffle plate, lower diameter arranged greatly and have some apertures in lower side, is installed in from bottom to top in the endoporus of valve seat 2; There is a macropore at the overhead gage center, in the outside of macropore several apertures is arranged; There is a macropore at the lower baffle plate center, also can be processed into equally with overhead gage, has outside aperture.The ball float 5 that can fluctuate is being arranged between the lower baffle plate on the current limliting circulating sleeve 4.In the setting of casing process, ball float 5 upwards floats the middle macropore of sealing overhead gage and makes the aperture of limit section normally pass through drilling fluid, has guaranteed that current limliting is from filling with finishing of function; When meeting with obstruction in the setting of casing process, can circulate with medium discharge capacity midway, can not cause the current limliting circulating sleeve to cut off to cut off descending.Circulation time midway, the drilling fluid that flows downward to lower compression, make ball float 5 large and small hole in the overhead gage all participate in midway circulation, through the liquid stream of overhead gage from a group aperture of current limliting circulating sleeve 4 lower side and to dirty; When stopping to circulate rear continuation setting of casing, ball float 5 floatings seal the macropore in the middle of the overhead gage, and the drilling fluid passage returns to again constrained state, do not affect to keep current limliting from the performance of filling with when continuing setting of casing, thereby can repeatedly circulate.When setting of casing finishes to carry out the circulation of large discharge capacity, cut off and cut off 11 and move downward and landing goes out valve seat 2, the middle largest passages of valve seat 2 is opened, can carry out normal large discharge capacity circulation and well cementation, make simultaneously valve gap 6 break away from restriction and under the effect of valve gap spring 7, form the one way valve that only allows fluid to flow downward with the internal conical surface close contact of valve seat 2 bottoms, return on the well cementation rear defence sealing mud.When the circulation of large discharge capacity can not make current limliting circulating sleeve 4 cut off to cut off 11 to move downward and landing when going out valve seat 2, as a kind of emergency mode, ball 13 is dropped into, be circulated to the top of current limliting circulating sleeve 4, under the effect of pressure, make its cut off cut off 11 descending and major path is opened.
Claims (6)
1. current-limiting self fill-up type that can repeatedly circulate, this float collar is mainly by body (1), valve seat (2), sealing ring (3), current limliting circulating sleeve (4), ball float (5), valve gap (6), valve gap spring (7), cut off (11), the compositions such as sealing mat (12), it is characterized in that: the lower end centre bore of valve seat (2) is equipped with current limliting circulating sleeve (4) and fixing with valve seat (2) by cutting off (11) from bottom to top, ball float (5) is arranged between the upper lower baffle plate of current limliting circulating sleeve (4), valve gap (6) links by bearing pin (14) and valve seat (2), and valve gap spring (7) is installed in bearing pin and valve cover chamber.
2. a kind of current-limiting self fill-up type that can repeatedly circulate according to claim 1, it is characterized in that: current limliting circulating sleeve (4) is a cylinder that upper lower baffle plate, lower diameter is arranged greatly and have some apertures in lower side, there is a macropore at the overhead gage center, in the outside of macropore several apertures is arranged; There is a macropore at the lower baffle plate center.
3. a kind of current-limiting self fill-up type that can repeatedly circulate according to claim 1 is characterized in that: mode and body (1) that valve seat (2) adopts traditional screw thread to tighten link.
4. a kind of current-limiting self fill-up type that can repeatedly circulate according to claim 1 is characterized in that: valve seat adopts and relies on fixed form and the body piecing together ring (8), jump ring (9), piece together ring bearing circle (10) to link.
5. a kind of current-limiting self fill-up type that can repeatedly circulate according to claim 2 is characterized in that: the identical several apertures that a center macropore and outside are arranged of upper lower baffle plate.
6. a kind of current-limiting self fill-up type that can repeatedly circulate according to claim 1, it is characterized in that: current limliting circulating sleeve (4) is connected to the conical surface with the endoporus of valve seat (2) and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220351731 CN202866744U (en) | 2012-07-16 | 2012-07-16 | Flow restricting self-filling float collar for manifold cycles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220351731 CN202866744U (en) | 2012-07-16 | 2012-07-16 | Flow restricting self-filling float collar for manifold cycles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202866744U true CN202866744U (en) | 2013-04-10 |
Family
ID=48033470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220351731 Expired - Fee Related CN202866744U (en) | 2012-07-16 | 2012-07-16 | Flow restricting self-filling float collar for manifold cycles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202866744U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223857A (en) * | 2016-08-24 | 2016-12-14 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of continuous circulating device of casing job and method |
| CN109736747A (en) * | 2019-02-13 | 2019-05-10 | 牡丹江北方油田机械有限公司 | Self-contained choked flow assembly |
-
2012
- 2012-07-16 CN CN 201220351731 patent/CN202866744U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106223857A (en) * | 2016-08-24 | 2016-12-14 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of continuous circulating device of casing job and method |
| CN109736747A (en) * | 2019-02-13 | 2019-05-10 | 牡丹江北方油田机械有限公司 | Self-contained choked flow assembly |
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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: 20130410 Termination date: 20150716 |
|
| EXPY | Termination of patent right or utility model |