CN204571921U - Anti-sticking plug is used in well cementation - Google Patents
Anti-sticking plug is used in well cementation Download PDFInfo
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- CN204571921U CN204571921U CN201520210455.6U CN201520210455U CN204571921U CN 204571921 U CN204571921 U CN 204571921U CN 201520210455 U CN201520210455 U CN 201520210455U CN 204571921 U CN204571921 U CN 204571921U
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Abstract
The utility model relates to cementing plug technical field, is a kind of well cementation anti-sticking plug; It comprises plug skeleton, outer plug cover, piston, shear pin, pressure-bearing lock tube and piston door; Outer plug cover is had in the external stability of plug skeleton; Be provided with the discharge channel of up/down perforation at plug skeletal internal, be provided with inner seal ring platform on the top of discharge channel and form passage necking segment, in passage necking segment, being sealed and installed with piston.The utility model reasonable and compact in structure, easy to use; When outer plug cover is by card, promotes piston by the liquid filling pressure increasing displacement fluid, shear pin is cut off, descent of piston also departs from passage necking segment, discharge channel is opened, and displacement fluid injects into well through inlet opening, discharge channel and fluid hole, avoids the generation of sausage-filling accident; In the process, insulating liquid can be adopted displacement fluid and cementing slurry to be isolated, and adopt the mode measuring borehole pressure to determine whether to put in place for slurry, realize smoothly for slurry operation.
Description
Technical field
the utility model relates to cementing plug technical field, is a kind of well cementation anti-sticking plug.
Background technology
well cementation, be cylindrical shaft wall is sunk to the levelling behaviour in shaft bottom flat after, by pipeline outside cylindrical shaft wall and well help between annular space inject the slurries as a form of gel that proportion is greater than mud, slurries are cemented out from bottom to up the operation of also consolidation cylindrical shaft wall; In well cementing operation, displacement fluid to be injected in sleeve pipe after cement paste injects; In order to displacement fluid and cementing slurry being isolated, first in sleeve pipe, to head into plug, then inject displacement fluid by cementing head; Descending for slurry process with the injection of displacement fluid at plug, the box and pin in the easy sleeve of plug blocks; Make cannot complete for slurry operation, cause cement paste to be detained in sleeve pipe, cause sausage-filling accident; Namely, in Process of Cementing, cement paste is caused to return less than design well depth because cement paste dodges the reason such as blocking or annular space bridge blinding in solidifying, sleeve pipe, the accident that in sleeve pipe, cement plug is long.
Summary of the invention
the utility model provides a kind of well cementation anti-sticking plug, overcomes the deficiency of above-mentioned prior art, and it effectively can solve plug in cementing process and, by card, cause the problem that cannot complete and cause sausage-filling accident for slurry operation.
the technical solution of the utility model is realized by following measures: a kind of well cementation anti-sticking plug, comprises plug skeleton, outer plug cover, piston, shear pin, pressure-bearing lock tube and piston door; Outer plug cover is had in the external stability of plug skeleton; Be provided with the discharge channel of up/down perforation at plug skeletal internal, be provided with inner seal ring platform on the top of discharge channel and form passage necking segment, in passage necking segment, being sealed and installed with piston; On piston above inner seal ring platform, radial direction is installed with the shear pin of energy seat at inner seal ring platform top; Be installed with in discharge channel upper end and piston can be held out against spacing pressure-bearing lock tube downwards, be against on the upper surface of piston bottom pressure-bearing lock tube, the pressure-bearing lock tube corresponding with packed-piston is provided with at least one inlet opening; Be installed with piston door in discharge channel lower end, piston door is distributed with fluid hole.
here is the further optimization and/or improvements to above-mentioned utility model technical scheme:
above-mentioned outer plug cover is outside can be interval with at least two from top to bottom in the outer annular plug skirt wing obliquely; The plug elasticity running-on in bowl-mouth shape is provided with in outer plug cover on the upside of plug skeleton.
can be provided with the spacing outer land of outwardly convex bottom the plug skeleton of above-mentioned outer plug cover lower end, the lower end of outer plug cover is against in spacing outer land; The bottom of spacing outer land is oblique becomes annular conical surface wide at the top and narrow at the bottom.
the inner ring surface of above-mentioned inner seal ring platform can be provided with at least one sealing ring and annular groove is installed, install in annular groove at sealing ring and be separately installed with sealing ring.
be fixed together by sulfuration between above-mentioned plug skeleton and outer plug overlap.
the downside of above-mentioned discharge channel can be provided with internal thread, and piston door is fixedly mounted on the bottom of discharge channel by screw thread; Or/and being provided with in the outer plug cover of plug skeleton upper end can by plug land fixing for pressure-bearing lock tube elasticity lock ring.
the utility model reasonable and compact in structure, easy to use; When outer plug cover is by card, promotes piston by the liquid filling pressure increasing displacement fluid, shear pin is cut off, descent of piston also departs from passage necking segment, discharge channel is opened, and displacement fluid injects into well through inlet opening, discharge channel and fluid hole, avoids the generation of sausage-filling accident; In the process, insulating liquid can be adopted displacement fluid and cementing slurry to be isolated, and adopt the mode measuring borehole pressure to determine whether to put in place for slurry, realize smoothly for slurry operation.
Accompanying drawing explanation
accompanying drawing 1 is that the master of the utility model most preferred embodiment is depending on partly cuing open structural representation.
coding in accompanying drawing is respectively: 1 is plug skeleton, and 2 is outer plug cover, and 3 is discharge channel, 4 is inner seal ring platform, and 5 is piston, and 6 is shear pin, 7 is pressure-bearing lock tube, and 8 is inlet opening, and 9 is piston door, 10 is fluid hole, 11 is the annular plug skirt wing, and 12 is plug elasticity running-on, and 13 is spacing outer shroud platform, 14 is sealing ring, and 15 is plug land.
Detailed description of the invention
the utility model by the restriction of following embodiment, can not determine concrete embodiment according to the technical solution of the utility model and actual conditions.
in the utility model, for convenience of description, the description of the relative position relation of each parts is all be described according to the Butut mode of Figure of description 1, as: the position relationship of upper and lower, left and right etc. determines according to the Butut direction of Figure of description 1.
below in conjunction with embodiment and accompanying drawing, the utility model is further described:
as shown in Figure 1, this well cementation anti-sticking plug comprises plug skeleton 1, outer plug cover 2, piston 5, shear pin 6, pressure-bearing lock tube 7 and piston door 9; Outer plug is had to overlap 2 in the external stability of plug skeleton 1; Be provided with the discharge channel 3 of up/down perforation in plug skeleton 1 inside, be provided with inner seal ring platform 4 on the top of discharge channel 3 and form passage necking segment, in passage necking segment, being sealed and installed with piston 5; On piston 5 above inner seal ring platform 4, radial direction is installed with the shear pin 6 of energy seat at inner seal ring platform 4 top; Be installed with in discharge channel 3 upper end and piston 5 can be held out against spacing pressure-bearing lock tube 7 downwards, be against on the upper surface of piston 5 bottom pressure-bearing lock tube 7, the pressure-bearing lock tube 7 corresponding with packed-piston 5 is provided with at least one inlet opening 8; Be installed with piston door 9 in discharge channel 3 lower end, piston door 9 is distributed with fluid hole 10.In well cementing process, when outer plug cover 2 is by card, pressurizeed by well head, displacement fluid applies downward thrust by inlet opening 8 to piston 5, and when thrust acquires a certain degree, shear pin 6 is cut off, piston 5 is descending and depart from passage necking segment, and discharge channel 3 is communicated with unlatching; Displacement fluid replaces slurry operation along the descending realization of discharge channel 3; For in slurry process, can inject insulating liquid before injection displacement fluid, insulating liquid can replace plug and realize displacement fluid and cementing slurry to isolate, and effectively avoids cements to pollute and prevents the flocculation multiviscosisty of drilling fluid; Simultaneously at the end of replacing slurry, the mode also by measuring borehole pressure replaces plug bruising, determines whether to put in place for slurry, meets and replaces slurry demand.
according to actual needs, above-mentioned well cementation anti-sticking plug can be made further optimization and/or improvements:
as shown in Figure 1, plug overlaps 2 outsides and is interval with at least two from top to bottom in the outer annular plug skirt wing 11 obliquely outside; The plug elasticity running-on 12 in bowl-mouth shape is provided with in outer plug cover 2 on the upside of plug skeleton 1.Because outer plug cover 2 itself adopts rubber to make, with certain elasticity; During with other equipment connections, directly can be put by plug elasticity running-on 12, and can tightly bind round at equipment connection place, can realize connecting.
as shown in Figure 1, be provided with the spacing outer land 13 of outwardly convex bottom the plug skeleton 1 that plug overlaps 2 lower ends outside, the lower end of outer plug cover 2 is against in spacing outer land 13; The bottom of spacing outer land 13 is oblique becomes annular conical surface wide at the top and narrow at the bottom.The annular conical surface of the oblique one-tenth of spacing outer land 13, plays the effect of descending guiding to the utility model.
as shown in Figure 1, the inner ring surface of inner seal ring platform 4 is provided with at least one sealing ring annular groove is installed, install in annular groove at sealing ring and be separately installed with sealing ring 14.Piston 5 is arranged in passage necking segment by sealing ring sealing, good airproof performance; Sealing ring 14 is general part simultaneously, and price is low, and it is convenient to change.
as required, plug skeleton 1 and outer plug are fixed together by sulfuration between overlapping 2.
as shown in Figure 1, be provided with internal thread in the downside of discharge channel 3, piston door 9 is fixedly mounted in the downside of discharge channel 3 by screw thread.Adopt between piston door 9 with plug skeleton 1 and be threaded, easy accessibility.
as shown in Figure 1, being provided with in the outer plug cover 2 of plug skeleton 1 upper end can by plug land 15 fixing for pressure-bearing lock tube 7 elasticity lock ring.
above technical characteristic constitutes most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (10)
1. an anti-sticking plug is used in well cementation, it is characterized in that comprising plug skeleton, outer plug cover, piston, shear pin, pressure-bearing lock tube and piston door; Outer plug cover is had in the external stability of plug skeleton; Be provided with the discharge channel of up/down perforation at plug skeletal internal, be provided with inner seal ring platform on the top of discharge channel and form passage necking segment, in passage necking segment, being sealed and installed with piston; On piston above inner seal ring platform, radial direction is installed with the shear pin of energy seat at inner seal ring platform top; Be installed with in discharge channel upper end and piston can be held out against spacing pressure-bearing lock tube downwards, be against on the upper surface of piston bottom pressure-bearing lock tube, the pressure-bearing lock tube corresponding with packed-piston is provided with at least one inlet opening; Be installed with piston door in discharge channel lower end, piston door is distributed with fluid hole.
2. well cementation anti-sticking plug according to claim 1, is characterized in that outer plug cover is outside and is interval with at least two from top to bottom in the outer annular plug skirt wing obliquely; The plug elasticity running-on in bowl-mouth shape is provided with in outer plug cover on the upside of plug skeleton.
3. well cementation anti-sticking plug according to claim 1 and 2, be provided with the spacing outer land of outwardly convex bottom the plug skeleton that it is characterized in that outer plug cover lower end, the lower end of outer plug cover is against in spacing outer land; The bottom of spacing outer land is oblique becomes annular conical surface wide at the top and narrow at the bottom.
4. well cementation anti-sticking plug according to claim 1 and 2, is characterized in that the inner ring surface of inner seal ring platform is provided with at least one sealing ring and installs annular groove, installs in annular groove be separately installed with sealing ring at sealing ring.
5. well cementation anti-sticking plug according to claim 3, is characterized in that the inner ring surface of inner seal ring platform is provided with at least one sealing ring and installs annular groove, installs in annular groove be separately installed with sealing ring at sealing ring.
6. well cementation anti-sticking plug according to claim 1 and 2, is characterized in that plug skeleton and outer plug are fixed together by sulfuration between overlapping.
7. well cementation anti-sticking plug according to claim 3, is characterized in that plug skeleton and outer plug are fixed together by sulfuration between overlapping.
8. well cementation anti-sticking plug according to claim 5, is characterized in that plug skeleton and outer plug are fixed together by sulfuration between overlapping.
9. well cementation anti-sticking plug according to claim 1 and 2, it is characterized in that the downside of above-mentioned discharge channel is provided with internal thread, piston door is fixedly mounted on the bottom of discharge channel by screw thread; Or/and being provided with in the outer plug cover of plug skeleton upper end can by plug land fixing for pressure-bearing lock tube elasticity lock ring.
10. well cementation anti-sticking plug according to claim 8, it is characterized in that the downside of above-mentioned discharge channel is provided with internal thread, piston door is fixedly mounted on the bottom of discharge channel by screw thread; Or/and being provided with in the outer plug cover of plug skeleton upper end can by plug land fixing for pressure-bearing lock tube elasticity lock ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520210455.6U CN204571921U (en) | 2015-04-09 | 2015-04-09 | Anti-sticking plug is used in well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520210455.6U CN204571921U (en) | 2015-04-09 | 2015-04-09 | Anti-sticking plug is used in well cementation |
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| Publication Number | Publication Date |
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| CN204571921U true CN204571921U (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520210455.6U Active CN204571921U (en) | 2015-04-09 | 2015-04-09 | Anti-sticking plug is used in well cementation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522878A (en) * | 2016-12-08 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Anti-seizing rubber plug |
| CN110374548A (en) * | 2019-07-18 | 2019-10-25 | 中国石油天然气股份有限公司 | A kind of combination tool and its application method of toe-end sliding sleeve and cementing plug |
| CN112302572A (en) * | 2020-11-09 | 2021-02-02 | 百勤能源科技（惠州）有限公司 | Soluble pump plug |
-
2015
- 2015-04-09 CN CN201520210455.6U patent/CN204571921U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522878A (en) * | 2016-12-08 | 2017-03-22 | 中国石油集团西部钻探工程有限公司 | Anti-seizing rubber plug |
| CN110374548A (en) * | 2019-07-18 | 2019-10-25 | 中国石油天然气股份有限公司 | A kind of combination tool and its application method of toe-end sliding sleeve and cementing plug |
| CN112302572A (en) * | 2020-11-09 | 2021-02-02 | 百勤能源科技（惠州）有限公司 | Soluble pump plug |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |