CN202913977U - Casing pipe floating collar - Google Patents
Casing pipe floating collar Download PDFInfo
- Publication number
- CN202913977U CN202913977U CN 201220567007 CN201220567007U CN202913977U CN 202913977 U CN202913977 U CN 202913977U CN 201220567007 CN201220567007 CN 201220567007 CN 201220567007 U CN201220567007 U CN 201220567007U CN 202913977 U CN202913977 U CN 202913977U
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- CN
- China
- Prior art keywords
- sliding sleeve
- upper sliding
- sleeve
- casing
- casing pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a casing pipe floating collar which comprises a body, threads which are matched with a petroleum casing pipe are arranged at the upper end and the lower end of the body, an upper sliding sleeve and a lower sliding sleeve are arranged in an inner cavity of the body, the upper sliding sleeve is placed on the upper portion of the inner cavity of the body, the lower sliding sleeve is placed on the lower portion of the inner cavity of the body, the lower end of the upper sliding sleeve is placed in an inner cavity of the lower sliding sleeve, rubber ring sealing is adopted among the body, the upper sliding sleeve and the lower sliding sleeve. The casing pipe floating collar can be applicable to casing operation in a long horizontal section, the frictional resistance between a lower casing pipe and a well wall can be effectively reduced, the fact that the casing operation in the long horizontal section is conducted smoothly is ensured, and therefore the current situation that a casing pipe cannot reach the designed location in the long horizontal section can be effectively solved.
Description
Technical field
The utility model relates to the power tool of the cased hole completion of the used horizontal well in oil field development field and directional well, particularly a kind of casing float collar.
Background technology
At present, excessive because of the weight of bottom bunch tube in the long horizontal sections Completion Operations, produce very large frictional resistance, the suspending weight of upper sleeve is not enough to overcome this frictional resistance, has under the sleeve pipe of part well less than design attitude, has caused unnecessary loss.Therefore will solve the problem that is lowered to the sleeve pipe difficulty in the long horizontal sections, will reduce exactly the frictional force between sleeve pipe and the borehole wall, casing float collar can effectively reduce the frictional force between sleeve pipe and the borehole wall, guarantees smoothly one of lower effective technology that arrives design attitude of sleeve pipe.
Publication number is 201794527U, the Chinese patent literature that open day is on April 13rd, 2011 discloses a kind of casing float collar, comprise a tubular body, blind plate and back-up ring, wherein, the two ends of described tubular body form respectively the first link and the second link, and the inwall of described tubular body forms a ring-shaped step and an annular groove; Described back-up ring is located in the annular groove; Described blind plate is located between ring-shaped step and the back-up ring, and described blind plate is to be subjected to the fluid power of 15～35MPa to impact the fragility plate that namely is broken into tiny particle.Casing float collar of the present utility model makes the process operation of well cementation simple, reliable, greatly reduces activity duration and the operating cost of well cementation, has very high economic benefit.
But the prior art take above-mentioned patent documentation as representative, its structure are comparatively complicated, and sealing effectiveness is not good.
The utility model content
For solving the problems of the technologies described above, the utility model proposes a kind of casing float collar, the utility model is applicable to the long horizontal sections casing job, can effectively reduce the frictional resistance that is lowered between sleeve pipe and the borehole wall, guarantee that the long horizontal sections casing job carries out smoothly, can effectively solve under the long horizontal sections setting of casing present situation less than design attitude.
The utility model is by adopting following technical proposals to realize:
A kind of casing float collar, comprise body, it is characterized in that: the top and bottom of body are provided with the screw thread that matches with petroleum casing pipe, in the inner chamber of body, be equipped with upper sliding sleeve and low sleeve, upper sliding sleeve is positioned at chamber body top, low sleeve is positioned at the chamber body bottom, and the upper sliding sleeve lower end is arranged in the low sleeve inner chamber, adopts seal with elastometic washer between body and upper sliding sleeve, the low sleeve three.
Described upper sliding sleeve is to fix by shear pin I and body, and low sleeve is to fix by shear pin II and body.
The top external diameter of described upper sliding sleeve is greater than lower outer diameter, and the bottom is cecum, is circumferentially with liquid flow hole, and seal is installed on the upper sliding sleeve.
Described low sleeve bottom internal diameter is equipped with seal greater than the top internal diameter on the low sleeve.
Compared with prior art, the beneficial effects of the utility model show:
1, in the utility model, adopt " in the inner chamber of body, being equipped with upper sliding sleeve and low sleeve; upper sliding sleeve is positioned at chamber body top; low sleeve is positioned at the chamber body bottom; the upper sliding sleeve lower end is arranged in the low sleeve inner chamber; adopt seal with elastometic washer between body and upper sliding sleeve, the low sleeve three " such technical scheme, applicable to the long horizontal sections casing job, can effectively reduce the frictional resistance that is lowered between sleeve pipe and the borehole wall, guarantee that the long horizontal sections casing job carries out smoothly, can effectively solve under the long horizontal sections setting of casing present situation less than design attitude.
2, in the utility model, adopt seal with elastometic washer between body and upper sliding sleeve, the low sleeve three, so just further strengthened sealing effectiveness.
3, in the utility model, upper sliding sleeve is to fix by shear pin I and body, and low sleeve is to fix by shear pin II and body; The top external diameter of described upper sliding sleeve is greater than lower outer diameter, and the bottom is cecum, is circumferentially with liquid flow hole, and seal is installed on the upper sliding sleeve; Described low sleeve bottom internal diameter is equipped with seal greater than the top internal diameter on the low sleeve.Such form of structure is more simple, sealing performance is more reliable, thereby long service life is convenient to generally apply.
Description of drawings
The present invention is described in further detail below in conjunction with specification drawings and specific embodiments, wherein:
Fig. 1 is structural representation of the present utility model
Mark among the figure:
1, body; 2, shear pin I; 3, upper sliding sleeve; 4, low sleeve; 5, shear pin II.
The specific embodiment
With reference to accompanying drawing, a kind of casing float collar comprises body 1, shear pin I 2, upper sliding sleeve 3, low sleeve 4, shear pin II 5 and necessary seal.It is characterized in that there is screw thread at body 1 two ends, can directly be connected with petroleum casing pipe.Body 1 inner chamber is equipped with upper sliding sleeve 3, low sleeve 4 successively, upper sliding sleeve 3 is positioned at body 1 inner chamber top, and be fastened by shear pin I 2 and body 1, low sleeve 4 is positioned at body 1 inner chamber bottom, and be fastened by shear pin II 5 and body 1, upper sliding sleeve 3 lower ends are arranged in low sleeve 4 inner chambers, adopt seal with elastometic washer between body 1 and upper and lower sliding sleeve 4 threes.
The top external diameter of described upper sliding sleeve 3 is greater than lower outer diameter, and the bottom is cecum, is circumferentially with liquid flow hole, on the upper sliding sleeve 3 seal is installed.
Described low sleeve 4 bottom internal diameters are equipped with seal greater than the top internal diameter on the low sleeve 4.
Claims (4)
1. casing float collar, comprise body (1), it is characterized in that: the top and bottom of body (1) are provided with the screw thread that matches with petroleum casing pipe, in the inner chamber of body (1), be equipped with upper sliding sleeve (3) and low sleeve (4), upper sliding sleeve (3) is positioned at body (1) inner chamber top, low sleeve (4) is positioned at body (1) inner chamber bottom, upper sliding sleeve (3) lower end is arranged in low sleeve (4) inner chamber, body (1) and upper sliding sleeve (3), adopt seal with elastometic washer between low sleeve (4) three.
2. a kind of casing float collar according to claim 1, it is characterized in that: described upper sliding sleeve (3) is to fix by shear pin I (2) and body (1), and low sleeve (4) is to fix by shear pin II (5) and body (1).
3. a kind of casing float collar according to claim 1 and 2 is characterized in that: the top external diameter of described upper sliding sleeve (3) is greater than lower outer diameter, and the bottom is cecum, is circumferentially with liquid flow hole, and upper sliding sleeve is equipped with seal on (3).
4. a kind of casing float collar according to claim 3, it is characterized in that: described low sleeve (4) bottom internal diameter is greater than the top internal diameter, and low sleeve is equipped with seal on (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220567007 CN202913977U (en) | 2012-10-31 | 2012-10-31 | Casing pipe floating collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220567007 CN202913977U (en) | 2012-10-31 | 2012-10-31 | Casing pipe floating collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202913977U true CN202913977U (en) | 2013-05-01 |
Family
ID=48162298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220567007 Expired - Fee Related CN202913977U (en) | 2012-10-31 | 2012-10-31 | Casing pipe floating collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202913977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209301A (en) * | 2018-11-12 | 2019-01-15 | 中国海洋石油集团有限公司 | A kind of extended horizontal well floating screen assembly |
-
2012
- 2012-10-31 CN CN 201220567007 patent/CN202913977U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209301A (en) * | 2018-11-12 | 2019-01-15 | 中国海洋石油集团有限公司 | A kind of extended horizontal well floating screen 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: 20130501 Termination date: 20181031 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |