CN204532239U - A kind of well cementation bottom plug with calibration function - Google Patents
A kind of well cementation bottom plug with calibration function Download PDFInfo
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- CN204532239U CN204532239U CN201520208642.0U CN201520208642U CN204532239U CN 204532239 U CN204532239 U CN 204532239U CN 201520208642 U CN201520208642 U CN 201520208642U CN 204532239 U CN204532239 U CN 204532239U
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- lacquer disk
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- pressure limiting
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Abstract
The utility model discloses a kind of well cementation bottom plug with calibration function, comprise lacquer disk(-sc), lacquer disk(-sc) core, lacquer disk(-sc) core and lacquer disk(-sc) are once cast by mould, lacquer disk(-sc) core is hollow, hollow lacquer disk(-sc) core lower end is with the female extension diameter section of a length of tape, the pressure limiting plate of one and extension diameter section diameter matches is up loaded from hollow lacquer disk(-sc) core lower end, pressure limiting plate is made to withstand on the shoulder of extension diameter section, pressure limiting plate and lacquer disk(-sc) core contact surface are provided with sealing ring, realize sealing, below pressure limiting plate, be provided with fixed cover, fixed cover withstands pressure limiting plate by the internal thread being screwed into extension diameter section.The utility model, when Cementing construction is for slurry operation, can solves and judge when bottom plug arrives the problem in shaft bottom, after solution judges that bottom plug arrives shaft bottom, by contrast instrument stoichiometric number value and pipe string content product value, can control cement paste more accurately and return height.
Description
Technical field
The utility model relates to the well cementing operation instrument of oil gas field well cementing operation, especially a kind of well cementation bottom plug with calibration function.
Background technology
In petroleum works, conventional cementing plug is divided into bottom plug and top cement plug two kinds by its purposes.Top cement plug puts into sleeve pipe after being cementing, cement paste and drilling fluid is separated cement paste is all replaced out sleeve pipe.Bottom plug was circulating drilling fluid before cementing, first it headed into then cementing in sleeve pipe, be placed between drilling fluid and cement paste and play buffer action.Because the density of cement paste generally all can be greater than drilling fluid density, after sprue bushing, downstream rate is fast, easily mixes with insulating liquid or drilling well liquid phase.Bottom plug is used effectively to prevent drilling fluid from mixing mutually in sleeve pipe with cement paste.
Conventional cementing bottom plug 1-1.5MPa after drilling hydraulic to shaft bottom just can push up logical foundation and circulate, and 1-1.5MPa pressure during well cementing operation, Pump pressure meter can not accurately show.Accurately can not judge whether bottom plug arrives shaft bottom.
Utility model content
Technical problem to be solved in the utility model is, provides a kind of well cementation bottom plug with calibration function.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of well cementation bottom plug with calibration function, comprise lacquer disk(-sc), lacquer disk(-sc) core, lacquer disk(-sc) core and lacquer disk(-sc) are once cast by mould, lacquer disk(-sc) core is hollow, hollow lacquer disk(-sc) core lower end is with the female extension diameter section of a length of tape, the pressure limiting plate of one and extension diameter section diameter matches is up loaded from hollow lacquer disk(-sc) core lower end, pressure limiting plate is made to withstand on the shoulder of extension diameter section, pressure limiting plate and lacquer disk(-sc) core contact surface are provided with sealing ring, realize sealing, be provided with below pressure limiting plate with lacquer disk(-sc) core with internal diameter with externally threaded fixed cover, fixed cover withstands pressure limiting plate by the internal thread being screwed into extension diameter section.
The beneficial effects of the utility model are: calibration function, when Cementing construction is for slurry operation, by replacing drilling liquid pressure 10Mpa change, can solve and judge when bottom plug arrives the problem in shaft bottom, after judging that bottom plug arrives shaft bottom, contrast instrument stoichiometric number value and pipe string content product value, determine the drilling fluid consumption replacing cement paste, can control cement paste more accurately and return height.
Accompanying drawing explanation
Fig. 1 is the well cementation bottom plug structure chart of the utility model band calibration function;
In figure, 1. lacquer disk(-sc) 2. lacquer disk(-sc) core 3. fixed cover 4. pressure limiting plate 5. sealing ring
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
As shown in Figure 1, the well cementation bottom plug of band calibration function of the present utility model, comprise lacquer disk(-sc) 1, lacquer disk(-sc) core 2, lacquer disk(-sc) core 2 and lacquer disk(-sc) 1 are once cast by mould, lacquer disk(-sc) core 2 is hollow, hollow lacquer disk(-sc) core 2 lower end is with the female extension diameter section of a length of tape, the pressure limiting plate 4 of one and extension diameter section diameter matches is up loaded from hollow lacquer disk(-sc) core 2 lower end, pressure limiting plate 4 is made to withstand on the shoulder of extension diameter section, pressure limiting plate 4 with lacquer disk(-sc) core 2 contact surface are provided with sealing ring 5, realize sealing, be provided with below pressure limiting plate 4 with lacquer disk(-sc) core with internal diameter with externally threaded fixed cover 3, fixed cover 3 withstands pressure limiting plate 4 by the internal thread being screwed into extension diameter section.
The thickness of described pressure limiting plate 4 is 4 millimeters, and have 10Mpa change to determine whether novel rubber plug arrives shaft bottom by replacing drilling liquid pressure, read drilling well liquid measure in pipe string, calibration replaces cement paste consumption.
The utility model plug can when cement paste promotes the well cementation descending arrival shaft bottom of bottom plug, and pressure is elevated to preset value and cuts pressure limiting plate and judge that plug on earth.Contrast instrument stoichiometric number value and pipe string content product value, calibration measurement value, avoids the phenomenon occurred in well cementing process for empty cement paste.
The utility model can preset a higher force value opening well cementation bottom plug circulation port.When the descending arrival shaft bottom of cement paste promotion well cementation bottom plug, pressure is elevated to preset value and judges that plug on earth.
In sum, content of the present utility model is not limited in the above-described embodiment, knowledgeable people in same area can propose other embodiment easily within technological guidance's thought of the present utility model, but this embodiment is all included within scope of the present utility model.
Claims (2)
1. the well cementation bottom plug with calibration function, comprise lacquer disk(-sc) (1), lacquer disk(-sc) core (2), it is characterized in that, lacquer disk(-sc) core (2) and lacquer disk(-sc) (1) are once cast by mould, lacquer disk(-sc) core (2) is for hollow, hollow lacquer disk(-sc) core (2) lower end is with the female extension diameter section of a length of tape, the pressure limiting plate (4) of one and extension diameter section diameter matches is up loaded from hollow lacquer disk(-sc) core (2) lower end, pressure limiting plate (4) is made to withstand on the shoulder of extension diameter section, pressure limiting plate (4) with lacquer disk(-sc) core (2) contact surface are provided with sealing ring (5), realize sealing, be provided with below pressure limiting plate (4) with lacquer disk(-sc) core with internal diameter with externally threaded fixed cover (3), fixed cover (3) withstands pressure limiting plate (4) by the internal thread being screwed into extension diameter section.
2. the well cementation bottom plug of band calibration function according to claim 1, is characterized in that, the thickness of described pressure limiting plate (4) is 4 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208642.0U CN204532239U (en) | 2015-04-09 | 2015-04-09 | A kind of well cementation bottom plug with calibration function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208642.0U CN204532239U (en) | 2015-04-09 | 2015-04-09 | A kind of well cementation bottom plug with calibration function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204532239U true CN204532239U (en) | 2015-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520208642.0U Active CN204532239U (en) | 2015-04-09 | 2015-04-09 | A kind of well cementation bottom plug with calibration function |
Country Status (1)
| Country | Link |
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| CN (1) | CN204532239U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535776A (en) * | 2020-04-01 | 2020-08-14 | 中国海洋石油集团有限公司 | Well cementation plug puncture device |
-
2015
- 2015-04-09 CN CN201520208642.0U patent/CN204532239U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111535776A (en) * | 2020-04-01 | 2020-08-14 | 中国海洋石油集团有限公司 | Well cementation plug puncture device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210611 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106, Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
| TR01 | Transfer of patent right |