CN203547699U - Fracturing sliding sleeve - Google Patents
Fracturing sliding sleeve Download PDFInfo
- Publication number
- CN203547699U CN203547699U CN201320672540.5U CN201320672540U CN203547699U CN 203547699 U CN203547699 U CN 203547699U CN 201320672540 U CN201320672540 U CN 201320672540U CN 203547699 U CN203547699 U CN 203547699U
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- CN
- China
- Prior art keywords
- sliding sleeve
- sleeve pipe
- fracturing
- shear pin
- tooth
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- 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 - Lifetime
Links
- 238000010276 construction Methods 0.000 abstract description 10
- 238000003801 milling Methods 0.000 abstract description 9
- 238000010008 shearing Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model belongs to the field of downhole tools in oil and gas field horizontal well fracturing working, and relates to a fracturing sliding sleeve. The fracturing sliding sleeve is composed of an upper connector, a ball base, a sliding sleeve pipe, an opening ring, an outer cylinder and a lower connector, wherein the lower portion of the ball base is in threaded connection with the inner pipe wall of the sliding sleeve pipe, the sliding sleeve pipe is of a pipe-shaped structure, the lower end of the sliding sleeve pipe is of a tooth-shaped structure, the upper end of the lower connector is of a tooth-shaped structure which is correspondingly matched with the tooth-shaped structure of the lower end of the sliding sleeve pipe, the sliding sleeve pipe and the outer cylinder are fixed through an upper shear pin and a lower shear pin, and the diameter of the upper shear pin is smaller than that of the lower shear pin. According to the fracturing sliding sleeve, after fracturing construction is finished, milling working is carried out, the ball base can be effectively prevented from idling, and in the process of sliding sleeve opening by throwing a ball, the opening and closing states of the sliding sleeve can be clearly judged through pressure curve fluctuation in shearing by the two shear pins.
Description
Technical field
The utility model relates to a kind of fracturing sliding bush, belongs to water of oil-gas field horizontal well fracturing work downhole tool field.
Background technology
In recent years, staged fracturing technology is applied to Oil/gas Well more and more widely, to increase oil gas well capacity, improves effective development degree of oil-gas reservoir.Conventional fracturing strings is mainly comprised of fracturing packer and fracturing sliding bush.Existing staged fracturing of horizontal well sliding sleeve, is mainly comprised of top connection, ball seat, sliding sleeve pipe, urceolus, split ring, lower contact.During pressing crack construction, after the staged fracturing tool string connection that corresponding sliding sleeve is coordinated with hydraulic packer etc. down to design attitude, ball is dropped in tubing string, by well head pumping ball, arrive ball seat place, under well head pressure effect, the shear pin between sliding sleeve pipe and urceolus is cut off, ball seat drives sliding sleeve pipe to be displaced downwardly to the sandblast groove bottom on urceolus, and be connected on the inner tubal wall of urceolus bottom by split ring, fracturing fluid enters stratum through sandblast groove, carries out pressing crack construction.The major defect of its existence is: the one, and pressing crack construction finishes as will test, shutoff etc., to descend tool operation afterwards, because latus rectum in ball seat is too small, need carry out milling to ball seat, there will be the problems such as dropout, ball seat idle running in milling process; The 2nd, when pressing crack construction, if well head shows that pressure is close when fractured layer strata pressure and sliding sleeve shear pin are cut off, ground pressure monitoring curve shows that fluctuation is minimum, affects Field Force and judges sliding sleeve switch state.
Summary of the invention
The purpose of this utility model is time to judge that sliding sleeve switch state has the defect of error, provides a kind of fracturing sliding bush in order to overcome ball seat milling difficulty, the construction that prior art exists.
The purpose of this utility model is achieved in that
The utility model is comprised of top connection, ball seat, sliding sleeve pipe, split ring, urceolus, lower contact.Ball seat bottom is threaded with sliding sleeve pipe inner tubal wall; Sliding sleeve pipe is tubular structure, and its lower end is tooth-shape structure, and lower contact upper end is and the tooth-shape structure of sliding sleeve pipe lower end tooth-shape structure corresponding matching.Between sliding sleeve pipe and urceolus, by upper and lower twice shear pin, fix, upper shear pin diameter is less than lower shear pin diameter.
The beneficial effects of the utility model are: the one, if pressing crack construction carries out milling to ball seat after finishing, during milling, the tooth-shape structure of sliding sleeve pipe lower end and the tooth-shape structure of lower contact upper end are engaged, prevent ball seat idle running in milling process; The 2nd, during pressing crack construction, the pressure curve variation producing by cutting off two different shearing forces of twice shear pin, can accurately judge that twice shear pin is all cut off, and fracturing fluid enters stratum by sandblast groove.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
In figure, mark implication is: 1-top connection; 2-urceolus; 3-ball seat; 4-sliding sleeve pipe; 5-upper shear pin; 6-lower shear pin; 7-split ring; 8-lower contact.
The specific embodiment
As shown in Figure 1, the utility model is mainly comprised of top connection 1, urceolus 2, ball seat 3, sliding sleeve pipe 4, split ring 7 and lower contact 8, and ball seat 3 bottoms are threaded with sliding sleeve pipe 4 inner tubal walls; Sliding sleeve pipe 4 is tubular structure, and its lower end is tooth-shape structure, and lower contact 8 upper ends are and the tooth-shape structure of sliding sleeve pipe 4 lower end tooth-shape structure corresponding matching.Pressing crack construction finishes rear when ball seat 3 is carried out to milling operation, and the tooth-shape structure of the tooth-shape structure of sliding sleeve pipe 4 lower ends and lower contact 8 upper ends is engaged, prevents that in milling process, ball seat 3 dallies with sliding sleeve pipe 4.
Between sliding sleeve pipe 4 and urceolus 2, by upper and lower twice shear pin, fix, upper shear pin 5 diameters are less than lower shear pin 6 diameters.During pressing crack construction, the pressure curve variation producing by cutting off two different shearing forces of twice shear pin, can accurately judge that upper and lower twice shear pin is all cut off, ball seat and sliding sleeve pipe have been displaced downwardly to the sandblast groove bottom on urceolus, fracturing fluid enters stratum through sandblast groove, can carry out lower step fracturing work program.
Claims (2)
1. a fracturing sliding bush, is comprised of top connection (1), urceolus (2), ball seat (3), sliding sleeve pipe (4), split ring (7) and lower contact (8), it is characterized in that: ball seat (3) bottom is threaded with sliding sleeve pipe (4) inner tubal wall; Sliding sleeve pipe (4) is tubular structure, and its lower end is tooth-shape structure, and lower contact (8) upper end is and the tooth-shape structure of sliding sleeve pipe (4) lower end tooth-shape structure corresponding matching.
2. a kind of fracturing sliding bush according to claim 1, is characterized in that: between described sliding sleeve pipe (4) and urceolus (2), by upper and lower twice shear pin, fix, upper shear pin (5) diameter is less than lower shear pin (6) diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320672540.5U CN203547699U (en) | 2013-10-29 | 2013-10-29 | Fracturing sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320672540.5U CN203547699U (en) | 2013-10-29 | 2013-10-29 | Fracturing sliding sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203547699U true CN203547699U (en) | 2014-04-16 |
Family
ID=50465828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320672540.5U Expired - Lifetime CN203547699U (en) | 2013-10-29 | 2013-10-29 | Fracturing sliding sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203547699U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401931A (en) * | 2015-11-16 | 2016-03-16 | 中国石油天然气股份有限公司 | Integrated pipe column for casing pipe sliding sleeve fracturing production and fracturing production method for casing pipe sliding sleeve |
-
2013
- 2013-10-29 CN CN201320672540.5U patent/CN203547699U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105401931A (en) * | 2015-11-16 | 2016-03-16 | 中国石油天然气股份有限公司 | Integrated pipe column for casing pipe sliding sleeve fracturing production and fracturing production method for casing pipe sliding sleeve |
| CN105401931B (en) * | 2015-11-16 | 2018-03-09 | 中国石油天然气股份有限公司 | A kind of sliding sleeve of bushing fracturing integrated pipe column and its fracturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |