CN2677601Y - Well cementation casing levitron - Google Patents
Well cementation casing levitron Download PDFInfo
- Publication number
- CN2677601Y CN2677601Y CN 200320103001 CN200320103001U CN2677601Y CN 2677601 Y CN2677601 Y CN 2677601Y CN 200320103001 CN200320103001 CN 200320103001 CN 200320103001 U CN200320103001 U CN 200320103001U CN 2677601 Y CN2677601 Y CN 2677601Y
- Authority
- CN
- China
- Prior art keywords
- well cementation
- levitron
- sliding sleeve
- upper sliding
- cementation casing
- 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
Links
Abstract
The utility model relates to a well cementation casing levitron which solves the problem of blocking phenomenon when the testing tool passes through the sleeve pipe or the exiting well cementation casing levitron works underground. The utility model is characterized in that a plurality of unlocking blocks 4 are fixed on the wall of the upper sliding sleeve 5 via an upper pin break 3 and arranged on the step 2 of the shell 1 whose inner wall is provided with a slot 9. The utility model has the characteristics of not blocking when the well cementation casing levitron works underground or the testing tool passes through the sleeve pipe.
Description
Technical field:
The utility model relates to the well cementing operation instrument of used horizontal well in oil field development field and directional well, the casing floating device of particularly cementing the well.
Background technology:
In horizontal well and directional well, the bunch tube of horizontal segment or inclination section part because of its weight easily and the bottom borehole wall come in contact, in well cementing operation, cement can't enter between the sleeve pipe and the bottom borehole wall when replacing operation, influence push pipe efficient, cause horizontal segment or inclination section cementing quality poor, simultaneously, also can cause sleeve pipe to seal in difficulty, and present well cementation casing floating device, to press-off be a whole shell type because of separating, by on cut off upper sliding sleeve linked to each other with housing, during well cementation will on cut off and cut off and upper sliding sleeve is moved down, but since on cut off and also have remaining the retention after cutting off, therefore make underground work or testing tool generation jam phenomenon by sleeve pipe.
The utility model content:
Can produce the deficiency of jam phenomenon in order to overcome existing well cementation casing floating device during by sleeve pipe at underground work or testing tool, the utility model provides a kind of well cementation casing floating device, and this levitron has the advantages that not produce jam in the time of can making underground work or testing tool by sleeve pipe.
The technical solution of the utility model is: this well cementation casing floating device comprises housing and upper sliding sleeve, and upper sliding sleeve places in the housing, the upper sliding sleeve wall by on cut off intrinsic several and free piece, free piece and place inwall to have on the step of housing of groove.
The above-mentioned piece of freeing can be 4～6.
The beneficial effect that the utlity model has is: because this levitron has groove on housing, upper sliding sleeve wall and several free piece by on cut off and be connected as a single entity, freeing piece places on the step of slotting on the housing, when cutting off under the effect of upper sliding sleeve in external force when cutting off, freeing piece moves downward in company with upper sliding sleeve and enters the shaft bottom, can not influence underground work and testing tool smoothly by sleeve pipe, more can not produce the jam phenomenon.
Description of drawings:
Accompanying drawing 1 is a structure sectional view of the present utility model.
1-housing among Fig. 1, the 2-step cuts off on the 3-, and 4-frees piece, cuts off 7-low sleeve, 8-circulation port, 9-groove under the 5-upper sliding sleeve, 6-.
The specific embodiment:
Below in conjunction with accompanying drawing will the utility model is described in further detail:
By shown in Figure 1, this well cementation casing floating device comprises housing 1 and upper sliding sleeve 5, upper sliding sleeve 5 places in the housing 1, free piece 4 and can be 4～6, desirable 4 is preferred plan according to field experiment, freeing piece 4 places inwall to have on the step 2 of housing 1 of groove 9, on housing 1, have groove 9, upper sliding sleeve 5 walls by on cut off 3 with free piece 4 and be connected as a single entity, free piece 4 and place on the housing on the step 2 of fluting 9,, free piece 4 and move downward in company with upper sliding sleeve 5 and enter the shaft bottom when cutting off under the effect of upper sliding sleeve 5 in external force when cutting off 3, can not influence underground work and testing tool smoothly by sleeve pipe, more can not produce the jam phenomenon.
In actual use, the two ends endoporus of this levitron housing 1 is made the sleeve pipe screw thread of standard, bunch tube with top and the bottom links respectively, during for mud, builds the pressure earlier, under the effect of pressure, upper sliding sleeve 5 descending cutting off cut off 3 on low sleeve 7, can open circulation port 8, under the effect of pressure, cut off down and cut off 6, sliding sleeve (5,7) enters under the fluid effect in the well thereupon about freeing piece 4 companions, and circulation port 8 can make the inside and outside formation of sleeve pipe circulation canal, in the process that replaces drilling fluid, utilize the buoyancy of the density contrast generation of the inside and outside drilling fluid of casing string, the casing string of horizontal segment or inclination section is floating, be in well central authorities, not only the pipe string can be lowered to smoothly, simultaneously also can make casing centralization, keep totally unimpeded in the sleeve pipe, cement is full of annular space fully, improve displacement efficiency, guaranteed cementing quality.
Claims (2)
1, a kind of well cementation casing floating device, comprise housing (1) and upper sliding sleeve (5), upper sliding sleeve (5) places in the housing (1), it is characterized in that: upper sliding sleeve (5) wall by on cut off (3) intrinsic several and free piece (4), free piece (4) and place inwall to have on the step (2) of housing (1) of groove (9).
2, a kind of well cementation casing floating device according to claim 1 is characterized in that: free piece (4) and can be 4～6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320103001 CN2677601Y (en) | 2003-11-07 | 2003-11-07 | Well cementation casing levitron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320103001 CN2677601Y (en) | 2003-11-07 | 2003-11-07 | Well cementation casing levitron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2677601Y true CN2677601Y (en) | 2005-02-09 |
Family
ID=34580634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320103001 Expired - Fee Related CN2677601Y (en) | 2003-11-07 | 2003-11-07 | Well cementation casing levitron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2677601Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888574A (en) * | 2016-05-27 | 2016-08-24 | 成都北方石油勘探开发技术有限公司 | Well completion pipe string |
| CN106639911A (en) * | 2016-12-26 | 2017-05-10 | 中国石油天然气股份有限公司 | Variable-diameter floating coupling |
-
2003
- 2003-11-07 CN CN 200320103001 patent/CN2677601Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888574A (en) * | 2016-05-27 | 2016-08-24 | 成都北方石油勘探开发技术有限公司 | Well completion pipe string |
| CN106639911A (en) * | 2016-12-26 | 2017-05-10 | 中国石油天然气股份有限公司 | Variable-diameter floating coupling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050209 Termination date: 20121107 |