CN204283333U - Well cementing impact pressure self-closing valve - Google Patents
Well cementing impact pressure self-closing valve Download PDFInfo
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- CN204283333U CN204283333U CN201420642598.XU CN201420642598U CN204283333U CN 204283333 U CN204283333 U CN 204283333U CN 201420642598 U CN201420642598 U CN 201420642598U CN 204283333 U CN204283333 U CN 204283333U
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- sliding sleeve
- spacing
- impact pressure
- setting lining
- well cementing
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Abstract
The utility model relates to a kind of well cementing impact pressure self-closing valve, belongs to oil drilling industry cementing tool technical field.The utility model is made up of valve body, bruising sliding sleeve, setting lining, closedown sliding sleeve, spacing steel ball, driving spring, cover of the spacing end and shear pin; Valve body is tubular structure, and two ends are provided with connecting thread; Setting lining is " convex " font tubular structure, and be positioned at valve inner, jacket wall bottom has tap hole, has spacing ball in the middle part of jacket wall, holds spacing steel ball in hole; Bruising sliding sleeve is tubular structure, and lower inner wall has groove, is placed on the outer top of setting lining; Closedown sliding sleeve is tubular structure, is positioned at setting bush inside, holds driving spring in it; Cover of the spacing end is loop configuration, is fixed on setting lining lower end.Shaft bottom reliably can be closed when well cementing impact pressure by the utility model, effectively prevents cement paste from blowing back into sleeve pipe, and can prevent desilting or landwaste deposition blocking circulation canal in drilling fluid, fully can meet the technical need of cementing operation operation.
Description
Technical field
The utility model relates to a kind of well cementing impact pressure self-closing valve, belongs to oil drilling industry cementing tool technical field.
Background technology
In the cementing operation operation process of current oil drilling; usually casing float collar float shoe can be used to flow backwards to prevent cement paste; once float collar float plug disabler, blow back into directly causing cement paste in sleeve pipe and form cement plug, whole well time serious, even can be caused to scrap.Patent: ZL201010266105.3 discloses a kind of casing shut-in valve for cementing operation, and primarily of body, close cover, circulation overcoat formation, outer the putting of circulation is evenly equipped with circulation port, closes between cover and circulation overcoat and is sealed by "O"-ring.But this invention has following deficiency: first, when plug promote to close cover be moved downward to the outer circulation port put of circulation be just closed time, liquid between plug and circulation overcoat is just trapped in an airtight space, because liquid cannot be compressed, tired fluid effect makes closedown cover cannot continue to move down, because circulation port can not be completely obscured, lower liquid easily returns in sleeve pipe under stress, thus close unreliable; Secondly, owing to circulating, outer sleeving inner space is less, and the circulation port on its sidewall is that horizontal direction is offered, and when there is sand or landwaste deposition in drilling fluid, extremely easily causes circulation canal to block; In addition, when closedown is enclosed within and is subject to junk blocking, easily cause unexpected closedown under pressure, cause serious quality accident thus; Therefore, the reliability of this invention fully can not meet the technical need of cementing operation operation.
Summary of the invention
The purpose of this utility model is exactly unreliable in order to solve the closedown of prior art middle sleeve shut-in valve, circulation canal is or landwaste deposition blocking husky by drilling fluid decline easily, the junk problem such as easily cause that valve body is surprisingly closed in well, a kind of well cementing impact pressure self-closing valve is provided, guarantee that reliability is closed in shaft bottom, prevent circulation canal blocked, avoid valve body surprisingly to close.
The technical solution of the utility model is: provide a kind of well cementing impact pressure self-closing valve, is overlapped formed by valve body, bruising sliding sleeve, setting lining, closedown sliding sleeve, spacing steel ball, driving spring, the spacing end; Valve body is tubular structure, and upper/lower terminal is equipped with connecting thread; Setting lining is " convex " font tubular structure, and be positioned at valve inner, its upper end closed, bottom is connected with valve body lower portion by screw thread, and jacket wall bottom surrounding has tap hole, and in the middle part of jacket wall, symmetry has spacing ball, holds spacing steel ball in hole; Bruising sliding sleeve is tubular structure, and lower inner wall has groove, is placed on the outer top of setting lining, is fixed therebetween by shear pin; Closedown sliding sleeve is tubular structure, is positioned at setting bush inside, and its lower end is provided with interior shoulder, and hold column driving spring in it, its underpart outer wall has limited impression; Cover of the spacing end is loop configuration, and its internal diameter is less than the external diameter of closing sliding sleeve, by being screwed on setting lining lower end.
Two seals circle is provided with between setting lining and closedown sliding sleeve.
The root of setting lining and valve body screw thread junction is provided with sealing ring.
Setting lining and valve body connecting thread lower end are provided with anti-rotation pin.
Setting lining and the spacing end overlap between connecting thread bottom be provided with anti-rotation pin.
The cross section of closing sliding sleeve bottom unit with grooves in outer wall is trapezoidal or circular arc.
The diameter of spacing steel ball is greater than the wall thickness of setting lining.
Bruising sliding sleeve upper end tube wall at least has a discharge orifice.
Compared with prior art, because shaft bottom thoroughly can be closed when well cementing impact pressure by the utility model, effectively prevent cement paste from blowing back into sleeve pipe and cause the generation staying cement plug accident, desilting or landwaste deposition blocking circulation canal in drilling fluid can be prevented again, can also prevent because junk in well causes valve body surprisingly to be closed, fully can meet the technical need of cementing operation operation, be widely used in the well cementing operation of all kinds of prospect pit, horizontal well, deep-well, Holes of Complicated Wells.
Accompanying drawing explanation
Fig. 1: well cementing impact pressure self-closing valve cuts out pre-structure figure;
Fig. 2: well cementing impact pressure self-closing valve cuts out rear structure chart;
In figure: 1-valve body; 2-bruising sliding sleeve; The setting lining of 3-; 4-closes sliding sleeve; The spacing steel ball of 5-; 6-driving spring; 7-spacing end cover; 8-shear pin; 2-1-discharge orifice; 2-2-groove; 2-3-sealing ring; 2-4-anti-rotation pin; 3-1-tap hole; The spacing ball of 3-2-; 4-1-sealing ring; 4-2-sealing ring; 4-3-limited impression.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described further:
As shown in Figures 1 and 2, the utility model is overlapped 7 formed by valve body 1, bruising sliding sleeve 2, setting lining 3, closedown sliding sleeve 4, spacing steel ball 5, driving spring 6, the spacing end; Valve body 1 is tubular structure, and upper/lower terminal is equipped with connecting thread; Setting lining 3 is " convex " font tubular structure, and be positioned at valve body 1 inner, its upper end closed, bottom is connected with valve body 1 bottom by screw thread, and jacket wall bottom surrounding has tap hole 3-1, and in the middle part of jacket wall, symmetry has spacing ball 3-2, holds spacing steel ball 5 in hole; Bruising sliding sleeve 2 is tubular structure, and lower inner wall has groove 2-2, is placed on the setting outer top of lining 3, is fixed therebetween by shear pin 8; Closing sliding sleeve 4 is tubular structure, and be positioned at setting lining 3 inner, its lower end is provided with interior shoulder, and hold column driving spring 6 in it, its underpart outer wall has limited impression 4-3; Cover of the spacing end 7 is loop configuration, and its internal diameter is less than the external diameter of closing sliding sleeve 4, by being screwed on setting lining 3 lower end.
Two seals circle 4-1,4-2 is provided with between described setting lining 3 and closedown sliding sleeve 4; Described setting lining 3 is provided with sealing ring 2-3 with the root of valve body 1 connection of thread; Described setting lining 3 is provided with anti-rotation pin 2-4 with valve body 1 connecting thread lower end; Described setting lining 3 and the spacing end connecting thread bottom overlapped between 7 is provided with anti-rotation pin 7-1.
The cross section of described closedown sliding sleeve 4 bottom unit with grooves in outer wall 4-3 is trapezoidal or circular arc.
The diameter of described spacing steel ball 5 is greater than the wall thickness of setting lining 3.
Described bruising sliding sleeve 2 upper end tube wall at least has a discharge orifice 2-1.
When using this utility model, the internal thread rotation on valve body 1 top is connected to casing string bottom, valve body 1 lower external thread is connected to casing float collar top, when carrying out circulation well cleanup and cementing job after completing casing job, as shown in Figure 1, be limited in spacing ball 3-2 in the middle part of setting lining because of spacing steel ball 5 by bruising sliding sleeve 2 lower end inner wall and close within the limited impression 4-3 of sliding sleeve 4 outer wall, close the limited steel ball of sliding sleeve 45 and be positioned at setting lining 3 internal upper part, the tap hole 3-1 of setting lining 3 bottom is in open mode, liquid stream can annular space successively between valve body 1 and bruising sliding sleeve 2, the tap hole 3-1 of setting lining 3 bottom and the spacing end, overlapped 7 central through holes and flow downward, because space between valve body 1 and its internal construction is comparatively large, and the inner hydrophthalmia of setting lining 3 is open, and desilting and landwaste more easily pass through, and not easily result in blockage, even if there is unexpected junk in well, bruising sliding sleeve two ends also can not form pressure reduction, can not cut off descending after shear pin 8 and cause closing sliding sleeve and close.
After cementing operation completes, press-in plug is also for when starching to bruising, plug promotes to move down after bruising sliding sleeve 2 cuts off shear pin 8, as shown in Figure 2, when the groove 2-2 in bruising sliding sleeve 2 lower inner wall is concordant with the spacing ball 3-2 in the middle part of setting lining 3, spacing steel ball 5 is extruded limited impression 4-3 rear section and enters in groove 2-2 under driving spring 6 elastic force drives, now close sliding sleeve 4 and lose the axial limiting of spacing ball 5 to it, move down rapidly under the elastic force effect of driving spring 6, until the upper surface of cover of the spacing end 7 is touched in its lower surface; Now, the tap hole 3-1 of setting lining 3 bottom is closed sliding sleeve 4 and closes, and it is inner that liquid stream cannot blow back into valve body 1 via tap hole 3-1.In closing process, there is not liquid by situation about compressing owing to closing sliding sleeve 4, exist without tired fluid effect, therefore close reliable rapidly.Form cement plug because cement paste cannot pass back in sleeve pipe through the tap hole 3-1 of setting lining 3 bottom, therefore fully can guarantee the demand meeting cementing operation operation.
Claims (8)
1. well cementing impact pressure self-closing valve, overlapped (7) formed by valve body (1), bruising sliding sleeve (2), setting lining (3), closedown sliding sleeve (4), spacing steel ball (5), driving spring (6), the spacing end, valve body (1) is tubular structure, and upper/lower terminal is equipped with connecting thread; It is characterized in that: setting lining (3) is " convex " font tubular structure, be positioned at valve body (1) inner, its upper end closed, bottom is connected with valve body (1) bottom by screw thread, jacket wall bottom surrounding has tap hole (3-1), in the middle part of jacket wall, symmetry has spacing ball (3-2), holds spacing steel ball (5) in hole; Bruising sliding sleeve (2) is tubular structure, and lower inner wall has groove (2-2), is placed on setting lining (3) outer top, is fixed therebetween by shear pin (8); Closing sliding sleeve (4) is tubular structure, is positioned at setting lining (3) inner, and hold column driving spring (6) in it, its underpart outer wall has limited impression (4-3); Spacing end cover (7) is loop configuration, and its internal diameter is less than the external diameter of closing sliding sleeve (4), is fixed on setting lining (3) lower end.
2. well cementing impact pressure self-closing valve according to claim 1, is characterized in that: be provided with two seals circle (4-1,4-2) between setting lining (3) and closedown sliding sleeve (4).
3. well cementing impact pressure self-closing valve according to claim 1, is characterized in that: setting lining (3) is provided with sealing ring (2-3) with the root of valve body (1) connection of thread.
4. well cementing impact pressure self-closing valve according to claim 1, is characterized in that: setting lining (3) and valve body (1) connecting thread lower end are provided with anti-rotation pin (2-4).
5. well cementing impact pressure self-closing valve according to claim 1, is characterized in that: setting lining (3) and the spacing end connecting thread bottom overlapped between (7) is provided with anti-rotation pin (7-1).
6. well cementing impact pressure self-closing valve according to claim 1, is characterized in that: the cross section of closing sliding sleeve (4) bottom unit with grooves in outer wall (4-3) is trapezoidal or circular arc.
7. well cementing impact pressure self-closing valve according to claim 1, is characterized in that: the diameter of spacing steel ball (5) is greater than the wall thickness of setting lining (3).
8. well cementing impact pressure self-closing valve according to claim 1, is characterized in that: bruising sliding sleeve (2) upper end tube wall at least has a discharge orifice (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642598.XU CN204283333U (en) | 2014-10-31 | 2014-10-31 | Well cementing impact pressure self-closing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420642598.XU CN204283333U (en) | 2014-10-31 | 2014-10-31 | Well cementing impact pressure self-closing valve |
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| Publication Number | Publication Date |
|---|---|
| CN204283333U true CN204283333U (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420642598.XU Active CN204283333U (en) | 2014-10-31 | 2014-10-31 | Well cementing impact pressure self-closing valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863555A (en) * | 2016-04-26 | 2016-08-17 | 中国石油大学(华东) | Casing pipe float collar device for reverse circulation well cementation |
| CN111648744A (en) * | 2020-06-03 | 2020-09-11 | 中国石油化工股份有限公司 | Workover tubular column subassembly and reducing descaler thereof |
| CN111779462A (en) * | 2020-08-02 | 2020-10-16 | 濮阳中原三力创高机械设备有限公司 | Floating hoop and rubber plug interlocking device and application method |
-
2014
- 2014-10-31 CN CN201420642598.XU patent/CN204283333U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863555A (en) * | 2016-04-26 | 2016-08-17 | 中国石油大学(华东) | Casing pipe float collar device for reverse circulation well cementation |
| CN105863555B (en) * | 2016-04-26 | 2018-10-16 | 中国石油大学(华东) | A kind of reacting cycle well cementing casing pipe float collar device |
| CN111648744A (en) * | 2020-06-03 | 2020-09-11 | 中国石油化工股份有限公司 | Workover tubular column subassembly and reducing descaler thereof |
| CN111779462A (en) * | 2020-08-02 | 2020-10-16 | 濮阳中原三力创高机械设备有限公司 | Floating hoop and rubber plug interlocking device and application method |
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