CN103362448A - Combined device for float casing arrangement and check valve well cementation - Google Patents
Combined device for float casing arrangement and check valve well cementation Download PDFInfo
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- CN103362448A CN103362448A CN201310277685XA CN201310277685A CN103362448A CN 103362448 A CN103362448 A CN 103362448A CN 201310277685X A CN201310277685X A CN 201310277685XA CN 201310277685 A CN201310277685 A CN 201310277685A CN 103362448 A CN103362448 A CN 103362448A
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- well casing
- well
- float
- casing
- well cementation
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Abstract
The invention belongs to the field of hydrogeological drilling technical process, and provides a combined device for float casing arrangement and check valve well cementation, which has a novel structure, can reduce tensile force caused by dead weight of a well casing and can achieve the purpose of well cementation by means of safely sealing annular gaps in the external of the well casing through cement slurry. The combined device for float casing arrangement and check valve well cementation includes the well casing and a float board, wherein the float board is fixed in the well casing; a through pipe is arranged in the center of the float board; two check valves connected in series are arranged at the upper part and the lower part of the inside of the through pipe respectively; a reversely threaded catcher for fixing a drill pipe is mounted at the upper part of the through pipe; the float board is round; at least one through hole is formed in the lower part of the well casing. The combined device is widely applied to the field of hydrogeological drilling technical process.
Description
Technical field
Buoyancy of the present invention is put pipe and one way valve well cementation composite set, belongs to the field of hydrogeologic drilling technical matters.
Background technology
Development along with society, the weight of well casing underlying is also increasing, hole depth has reached four or five hundred meters at present, the aperture is more than one meter, the well casing diameter is more than 0.8 meter, wall thickness reaches 20mm, the well casing weight of existing large-diameter pipe wall thickness is far longer than the bearing capacity of rig hoisting power and boring tower, in order to solve the underlying of super weight well casing, and the lifting supporting capacity of adaptation hoist and frame tower, while is also lowered the pulling force that the well casing dead weight produces, and can reach the purpose of well cementation in safe water mud sealed tube outer ring-like gap, so is necessary to be improved.
Summary of the invention
The deficiency that exists in order to overcome prior art, the present invention proposes a kind of new construction, can reduce the pulling force that the well casing dead weight produces, and energy safe water mud sealed tube outer ring-like gap reaches the purpose of well cementation.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
Buoyancy is put pipe and one way valve well cementation composite set, comprise well casing and kickboard, be fixed with kickboard in well casing inside, there is siphunculus at the kickboard center, be furnished with up and down two one way valves that are in series in the siphunculus, siphunculus top is equipped with the fixedly anti-silk catcher of drilling rod, and kickboard is circular, and the bottom of well casing has at least one through hole.
The beneficial effect that the present invention compared with prior art has is:
1, is fixed with kickboard in well casing inside, lowered the pulling force that the well casing dead weight produces.
2, anti-silk catcher is installed on siphunculus top, and fixedly drilling rod connects one way valve and slush pump with drilling rod, and the mud pumping cement paste is to pipe outer ring-like gap, and the bottom of well casing has at least one through hole, reaches the purpose of well cementation.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 is the structural representation that buoyancy of the present invention is put pipe and one way valve well cementation composite set.
1 is that well casing, 2 is that anti-silk catcher, 3 is that kickboard, 4 is that one way valve, 5 is that siphunculus, 6 is through hole among the figure.
The specific embodiment
The invention will be further described by reference to the accompanying drawings below by embodiment.
As shown in Figure 1, buoyancy is put pipe and one way valve well cementation composite set, comprise well casing 1 and kickboard 3, be fixed with kickboard 3 in well casing 1 inside, there is siphunculus 5 at kickboard 3 centers, are furnished with up and down two one way valves that are in series 4 in the siphunculus 5, and siphunculus 5 tops are equipped with the fixedly anti-silk catcher 2 of drilling rod, kickboard 3 is circular, and the bottom of well casing 1 has at least one through hole 6.
Well casing 1 weight of large-diameter pipe wall thickness is far longer than the bearing capacity of rig hoisting power and boring tower.Utilize the repel and attack principle of liquid weight of buoyancy, in the circular kickboard 3 of well casing 1 nearly bottom processing.Kickboard 3 centers are equipped with two one-way cocks 4.Could adapt to the lifting supporting capacity of rig and boring tower during lower pipe, well casing 1 is put in place, connect one way valve 4 and slush pump with drilling rod, the mud pumping cement paste is cemented the well to pipe outer ring-like gap.Solve super weight well casing 1 underlying, and adapted to the bearing capacity of hoist and frame tower.While is also reduced the pulling force that well casing 1 dead weight produces, and can reach fixedly well purpose in safe water mud sealed tube outer ring-like gap.
Osiery was congratulated the gas discharge in mine hole in 2013.Hole depth 430m, aperture 1100mm, well casing diameter 860mm, wall thickness 20mm, more than 170 ton of gross weight.The lifting of rig and boring tower, bearing capacity are 80 tons, and lower pipe is smooth, and the well cementation effect is fine.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (3)
1. buoyancy is put pipe and one way valve well cementation composite set, comprise well casing (1) and kickboard (3), it is characterized in that: be fixed with kickboard (3) in well casing (1) inside, there is siphunculus (5) at kickboard (3) center, be furnished with up and down two one way valves that are in series (4) in the siphunculus (5), siphunculus (5) top is equipped with the fixedly anti-silk catcher (2) of drilling rod.
2. buoyancy according to claim 1 is put pipe and one way valve well cementation composite set, and it is characterized in that: kickboard (3) is for circular.
3. buoyancy according to claim 1 is put pipe and one way valve well cementation composite set, and it is characterized in that: the bottom of well casing (1) has at least one through hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310277685XA CN103362448A (en) | 2013-07-04 | 2013-07-04 | Combined device for float casing arrangement and check valve well cementation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310277685XA CN103362448A (en) | 2013-07-04 | 2013-07-04 | Combined device for float casing arrangement and check valve well cementation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103362448A true CN103362448A (en) | 2013-10-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310277685XA Pending CN103362448A (en) | 2013-07-04 | 2013-07-04 | Combined device for float casing arrangement and check valve well cementation |
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| CN (1) | CN103362448A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4671358A (en) * | 1985-12-18 | 1987-06-09 | Mwl Tool Company | Wiper plug cementing system and method of use thereof |
| CN2396176Y (en) * | 1999-10-29 | 2000-09-13 | 辽河石油勘探局钻采工艺研究院 | Double-valve type automatic sludge-filling shutoff device |
| CN201412112Y (en) * | 2009-06-05 | 2010-02-24 | 中国石化集团胜利石油管理局钻井工艺研究院 | Dual-Faner well cementing tool for well completion by expansible sleeve |
| CN202810780U (en) * | 2012-10-11 | 2013-03-20 | 中煤矿山建设集团有限责任公司 | Gas sucking and exhausting hole sleeve with baseboard capable of being dismantled |
| CN203362054U (en) * | 2013-07-04 | 2013-12-25 | 山西省勘察设计研究院 | Combination device with function of casing placement through buoyancy and function of well cementation through check valves |
-
2013
- 2013-07-04 CN CN201310277685XA patent/CN103362448A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4671358A (en) * | 1985-12-18 | 1987-06-09 | Mwl Tool Company | Wiper plug cementing system and method of use thereof |
| CN2396176Y (en) * | 1999-10-29 | 2000-09-13 | 辽河石油勘探局钻采工艺研究院 | Double-valve type automatic sludge-filling shutoff device |
| CN201412112Y (en) * | 2009-06-05 | 2010-02-24 | 中国石化集团胜利石油管理局钻井工艺研究院 | Dual-Faner well cementing tool for well completion by expansible sleeve |
| CN202810780U (en) * | 2012-10-11 | 2013-03-20 | 中煤矿山建设集团有限责任公司 | Gas sucking and exhausting hole sleeve with baseboard capable of being dismantled |
| CN203362054U (en) * | 2013-07-04 | 2013-12-25 | 山西省勘察设计研究院 | Combination device with function of casing placement through buoyancy and function of well cementation through check valves |
Non-Patent Citations (1)
| Title |
|---|
| 胡德成等: "下封闭式压力注浆止水方法的研究", 《中国煤田地质》, no. 02, 30 June 1992 (1992-06-30) * |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131023 |
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| RJ01 | Rejection of invention patent application after publication |