CN202402007U - Free falling type drill-free stage collar - Google Patents
Free falling type drill-free stage collar Download PDFInfo
- Publication number
- CN202402007U CN202402007U CN2012200061444U CN201220006144U CN202402007U CN 202402007 U CN202402007 U CN 202402007U CN 2012200061444 U CN2012200061444 U CN 2012200061444U CN 201220006144 U CN201220006144 U CN 201220006144U CN 202402007 U CN202402007 U CN 202402007U
- Authority
- CN
- China
- Prior art keywords
- rubber plug
- plug
- collar
- free
- sizing collar
- 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
A free falling type drill-free stage collar includes a stage collar, wherein a jacket with a circulation opening is arranged on the stage collar; an upper sliding sleeve used for closing the circulation opening through moving downwards and a lower sliding sleeve with an opening matched with the circulation opening are arranged inside the stage collar; a rubber plug base with a ring structure is also arranged inside the stage collar; the rubber plug collar adopts a six-piece split structure; a tightening spring capable of tightening the rubber plug base towards an inner bore of the rubber plug base is arranged on the rubber plug base; and a rubber plug sleeve used for accommodating a closed rubber plug is arranged in the inner bore of the rubber plug base. The utility model dispenses with a bore rubber plug and a bore rubber plug base, and simplifies the internal structure of the stage collar. The closed rubber plug is mounted in the rubber plug sleeve, so that the contact friction between a rubber skirt rim of the closed rubber plug and an inner wall of the sleeve is eliminated, and the closed rubber plug can fall onto the well bottom in a free falling manner. The rubber plug base adopts an internal collapsing structure, so that after the rubber plug sleeve falls down, the rubber plug base internally collapses and falls down, and further the smoothness and diameter of the inner wall of the stage collar can be ensured.
Description
Technical field
The utility model relates to the oil gas well drilling field, and relate in particular to a kind of free-falling type and exempt to bore sizing collar, be in the oil gas well drilling process, be used for the special tool of well cementing operation.For the two stage cementing well cementing operation, the free-falling type exempts to bore sizing collar can remove the operation of boring except that inner plug of sizing collar and plug seat from, shortens the construction operation cycle.
Background technology
Early stage sizing collar cementing technology after the operation of completion two-stage cementing, has retained plug and plug seat in sizing collar, drilling tool bores plug and plug seat under needing, and just can carry out other follow-up operation.Exempt to bore sizing collar two-stage cementing technology, after the operation of completion two-stage cementing, plug and plug seat in the sizing collar have been removed the operation that time drilling tool bores from, have both shortened the construction period of two-stage cementing, have reduced operating risk again, are the new developing direction of two-stage cementing technology.
The present existing sizing collar cementing technology of exempting to bore, after the operation of completion two-stage cementing, plug and plug seat in the sizing collar have following two kinds of whereabouts modes.First kind, during with the flow string drifting of completion, with plug and the logical shaft bottom that drops down onto of plug seat.Second kind,, drive plug and plug seat and fall to the shaft bottom with the gravity plug of perforate.First kind of mode before the lower tubular column drifting, can't be carried out the completion logging operation.The second way, the success rate in plug and shaft bottom, plug seat whereabouts remain further to be improved.
Summary of the invention
To the problems referred to above, the purpose of the utility model is to provide a kind of free-falling type to exempt to bore sizing collar, need bore plug and the problem of plug seat in the sizing collar with drilling tool to solve in the prior art.
To achieve these goals, the technical scheme of the utility model is following:
The free-falling type exempts to bore sizing collar; It is characterized in that; Comprise sizing collar, said sizing collar is provided with the overcoat that has circulation port, is provided with the low sleeve through moving down the upper sliding sleeve of closing circulation port and having the hole of matching with circulation port in the said sizing collar; Also be provided with the plug seat of loop configuration in the said sizing collar; Said plug seat is six a split-type structural, and said plug seat is provided with the spring that tightens up that tightens up the plug seat to the endoporus direction, is provided with in the endoporus of said plug seat to can be used for filling in the plug cover of closing plug.
Further, in the utility model, be provided with plug cover pin between said plug cover and the plug seat.
Further, in the utility model, the upper end of said sizing collar is provided with top connection, and the lower end of said sizing collar is provided with lower contact.
After one-level well cementation bruising, continue to give in the sleeve pipe to be forced into design load, the lower end compression area of low sleeve is greater than the upper end compression area; The pipe internal pressure produces thrust upwards to low sleeve; Low sleeve is up to be one with the upper sliding sleeve lock, and the sizing collar circulation port exposes, the well cementing operation of beginning secondary.Secondary cementing slurry is pressed into and closes plug after accomplishing, and when closing after plug falls into the plug cover, continues pressurization in the sleeve pipe, the descending circulation port of closing of upper and lower sliding sleeve.When closing after plug falls into plug cover, the rubber shirt rim of closing plug is shunk and is got into the plug cover, between plug cover external diameter and casing inner diameter bigger gap is arranged.Continue pressurization and cut off plug cover pin, plug overlaps with closing the plug free-falling to the shaft bottom.After the plug cover broke away from the plug seat, the plug seat was under the effect of preloading spring, and inwardly after the crumple, its external diameter is much smaller than casing inner diameter, and the free-falling of plug seat is to the shaft bottom.
The beneficial effect of the utility model is, cancelled perforate plug and perforate plug seat, simplified the internal construction of sizing collar.To close the plug plug cover of packing into, and eliminate the rubber shirt rim of closing plug and the contact friction of internal surface of sleeve pipe, guaranteeing to close plug can drop down onto the shaft bottom with the mode of free-falling.Routed formula structure in the plug seat adopts falls behind under plug overlaps, routed whereabouts in the plug seat, the smooth and latus rectum of assurance sizing collar inwall.
Description of drawings
Fig. 1 is the structural representation that the free-falling type exempts to bore sizing collar.
Fig. 2 is the structural representation of plug seat.
Fig. 3 is the upward view of Fig. 2.
Fig. 4 is the structural representation of plug cover.
Wherein, 1. top connection, 2. overcoat, 3.O RunddichtringO, 4. pressure cap; 5. the plug seat 6. tightens up spring, and 7. the plug cover is pinned 8.O RunddichtringO, 9. stopping steel ball; 10. close the hole pin, 11. upper sliding sleeves, 12. stopping steel balls, 13.O RunddichtringO, 14. plug covers; 15.O RunddichtringO, 16. perforates pin, 17. low sleeves, 18. lower contacts.
The specific embodiment
The free-falling type exempts to bore sizing collar, comprises sizing collar (not indicating among the figure), and the upper end of sizing collar is provided with top connection 1, and the lower end of sizing collar is provided with lower contact 18.Sizing collar is provided with the overcoat 2 that has circulation port; Be provided with in the sizing collar through moving down upper sliding sleeve 11 of closing circulation port and the low sleeve 17 that has the hole of matching with circulation port; Fixing between upper sliding sleeve 11 and the overcoat 2 through closing hole pin 10, fixing between low sleeve 17 and the overcoat 2 through perforate pin 16.
Also be provided with the plug seat 5 of loop configuration in the sizing collar, plug seat 5 is split-type structurals of six, and plug seat 5 is provided with to what the endoporus direction was tightened up the plug seat and tightens up spring 6, is provided with in the endoporus of plug seat 5 to can be used for filling in the plug cover 14 of closing plug.Be provided with plug cover pin 7 between plug cover 14 and the plug seat 5.
The free-falling type is exempted to bore sizing collar be connected during sleeve pipe scurries, with the sleeve pipe G.I.H according to design attitude.After one-level well cementing operation bruising, continue to be forced into design pressure, the lower end compression area of low sleeve 17 is greater than the upper end compression area; After perforate pin 16 is cut off; Low sleeve 17 is up becomes one with upper sliding sleeve 11, and the circulation port on the overcoat 2 is communicated with, beginning second level well cementing operation.After having annotated second level cement paste.Be pressed into and close plug, close plug when coming downwards to plug seat 5, close plug and be pressed into plug cover 14; Continuing to be forced into hole, pass pin 10 cuts off; Upper sliding sleeve 11, low sleeve 17 are descending, close the circulation port on the overcoat 2, continue to be forced into to cut off plug cover pin 7; Close plug and plug cover 14 and break away from, drop down onto the shaft bottom with the mode of free-falling with plug seat 5.When closing plug and plug cover 14 when breaking away from plug seat 5, plug seat 5 inwardly after the crumple, drops down onto the shaft bottom with the mode of freely falling body under the effect of tightening up spring 6.Close plug, plug cover 14 and 5 times backwardnesss of plug seat, the internal diameter of sizing collar keeps smooth design latus rectum.
In Fig. 2, plug seat 5 is split-type structurals of six, cuts off at plug cover pin 7, after plug cover 14 breaks away from the plug seat 5, plug seat 5 under the tightening force effect of tightening up spring 6, inwardly crumple, its external diameter realizes that less than casing inner diameter free-falling is to the shaft bottom.
In Fig. 3; Plug cover 14 be a cylinder-like structure, and when closing after plug is pressed into plug cover 14, the rubber shirt rim of closing plug is extruded to shrink and gets into plug and overlap in 14; Avoided closing the rubber shirt rim of plug and contacting of internal surface of sleeve pipe, plug is closed in realization and plug overlaps together free-falling to the shaft bottom.
Claims (3)
1. free-falling type exempts to bore sizing collar; It is characterized in that; Comprise sizing collar, said sizing collar is provided with the overcoat (2) that has circulation port, is provided with in the said sizing collar through moving down upper sliding sleeve (11) of closing circulation port and the low sleeve (17) that has the hole of matching with circulation port; Also be provided with the plug seat (5) of loop configuration in the said sizing collar; Said plug seat (5) is six a split-type structural, and said plug seat is provided with to what the endoporus direction was tightened up the plug seat and tightens up spring (6), is provided with in the endoporus of said plug seat to can be used for filling in the plug cover (14) of closing plug.
2. exempt to bore sizing collar according to right 1 described free-falling type, it is characterized in that, be provided with plug cover pin (7) between said plug cover (14) and the plug seat (5).
3. exempt to bore sizing collar according to right 1 described free-falling type, it is characterized in that the upper end of said sizing collar is provided with top connection (1), the lower end of said sizing collar is provided with lower contact (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200061444U CN202402007U (en) | 2012-01-09 | 2012-01-09 | Free falling type drill-free stage collar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200061444U CN202402007U (en) | 2012-01-09 | 2012-01-09 | Free falling type drill-free stage collar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202402007U true CN202402007U (en) | 2012-08-29 |
Family
ID=46699658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200061444U Expired - Fee Related CN202402007U (en) | 2012-01-09 | 2012-01-09 | Free falling type drill-free stage collar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202402007U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775025A (en) * | 2014-03-03 | 2014-05-07 | 青岛海蚨奥工贸有限公司 | Classifying hoop |
| CN105507847A (en) * | 2014-09-25 | 2016-04-20 | 中国石油化工股份有限公司 | Apparatus and method for drill pipe plug field testing |
-
2012
- 2012-01-09 CN CN2012200061444U patent/CN202402007U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775025A (en) * | 2014-03-03 | 2014-05-07 | 青岛海蚨奥工贸有限公司 | Classifying hoop |
| CN105507847A (en) * | 2014-09-25 | 2016-04-20 | 中国石油化工股份有限公司 | Apparatus and method for drill pipe plug field testing |
| CN105507847B (en) * | 2014-09-25 | 2018-05-08 | 中国石油化工股份有限公司 | A kind of apparatus and method for drilling rod rubber plug field test |
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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: 20120829 Termination date: 20180109 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |