CN103670311A - Safe releasing tool for horizontal well - Google Patents
Safe releasing tool for horizontal well Download PDFInfo
- Publication number
- CN103670311A CN103670311A CN201210351622.XA CN201210351622A CN103670311A CN 103670311 A CN103670311 A CN 103670311A CN 201210351622 A CN201210351622 A CN 201210351622A CN 103670311 A CN103670311 A CN 103670311A
- Authority
- CN
- China
- Prior art keywords
- sealing
- sealing ring
- sliding sleeve
- groove
- horizontal well
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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.)
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- 238000007789 sealing Methods 0.000 claims abstract description 61
- 238000005516 engineering process Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010027336 Menstruation delayed Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
A safe releasing tool for a horizontal well comprises an upper connector, a shear pin, sealing rings, sealing rings A, a releasing sliding sleeve, a sealing sleeve, sealing rings C and a lower connector. The safe releasing tool for the horizontal well is characterized in that the sealing rings C are embedded into a sealing groove of the sealing sleeve and then the sealing rings C are connected and screwed with the lower connector through threads; the sealing rings A are embedded into a sealing groove of the upper connector; the sealing rings are embedded into a sealing groove of the releasing sliding sleeve; the lower end of the upper connector is installed inside an inner groove of the sealing sleeve; the releasing sliding sleeve which is screwed with the sealing rings is installed in an inner hole of the upper connector; so that the lower end portion of the upper connector is rightly pressed into the inner groove of the sealing sleeve and the shear pin is installed inside a shear pin groove of the releasing sliding sleeve through a threaded hole of the upper connector. Compared with the prior art, the safe releasing tool for the horizontal well has the advantages of guaranteeing reliability of releasing operating modes, being reasonable in structural design, enabling a device to be simple, being low in utilization cost and convenient to install and saving production costs of the device.
Description
Technical field
The invention belongs to oil field equipment, relate to oilfield machinery water blockoff field, specifically, particularly relate to a kind of safe releasing tool for horizontal well.
Background technology
Late period of oil field, difficult exploiting field piece increases, and water injection pressure is high, and seperated layer water injection, layering squeezing down-hole string technology status more complicated, had a strong impact on oil field and normally produced.Development along with outlook for mechanical water plugging technology, the back-off sub of ball-throwing type and reverse buckling type back-off sub can not meet construction requirement completely, adopt the pitching mode of building the pressure to give up, while applying in high-inclination directional well and horizontal well, being prone to steel ball can not seal and put in place, cause giving up, though existing technology has solved the problems referred to above to a certain extent, but due to its unreasonable structure, cause install and use loaded down with trivial details, the problems such as inefficiency, working string can not normally be tripped out, even cause oil-water well heavy repair task, solve problems and must releasing tool structure design, thoroughly eliminate accident potential.And some completion pipe string is because not allowing the reasons such as rotation can not adopt the back-off operating type of giving up, and to construction, has brought very large trouble.For this situation, developed the existing safe releasing tool for horizontal well, its construction safety, is a kind of reliable hydraulic releasing tool.Without back-off or pitching, simple to operate, avoided steel ball not seal and put in place, the defect that can not give up, the poor ability of pressure-bearing of raising downhole tool and tubing string.
Summary of the invention
The object of the invention is for the weak point in existing technology, only provide and need the pin of giving up have been cut off to mode by adopting oil pipe to suppress, annular space is communicated with, overcoat, the following process pipe string of lower contact can be lost to a kind of safe releasing tool for horizontal well in well.
The present invention is achieved by the following technical solutions:
A kind of safe releasing tool for horizontal well, comprise top connection, shear pin, sealing ring, sealing ring A, the sliding sleeve of giving up, sealing shroud, sealing ring C, lower contact, it is characterized in that the described seal groove at sealing shroud is embedded in sealing ring C, is then connected and tightens with lower contact by screw thread; Sealing ring A is embedded in the seal groove of top connection, sealing ring is embedded in the seal groove of the sliding sleeve of giving up; The lower end of top connection is installed in the inside groove of sealing shroud, and the sliding sleeve of giving up of first-class sealing ring is installed in the endoporus of top connection, make in the bottom inside groove that just indentation sealing overlaps of top connection.Screwed hole by shear pin by top connection is installed in the shear pin groove of the sliding sleeve of giving up.
Further illustrate, sealing ring of the present invention has 4, and described sealing ring A and sealing ring C respectively have respectively 2.
Groundwork principle of the present invention by: the bottom of back-off sub is connect to process pipe string and is lost when the downhole designs position, in oil pipe, first drop into plug seat in the sealing surface of fuse, pressurize again, cut off shear pin, fuse is descending, seat is situated between in the interior platform of joint, annular space is communicated with, thereby make to lock pawl and lose inner support, now tubing and casing is communicated with, cover overflows to be increased, pressure drop, then upper lifting pipe post, cause is fixing with the bottom tubing string that lower contact is joined, so force in lock pawl and transferred to lower contact and sealing shroud after receipts, thereby by sealing shroud, lower contact and following process pipe string thereof are lost in well, it is in being tripped out.
Usefulness of the present invention is:
A kind of safe releasing tool for horizontal well of the present invention, compared with the prior art tool has the following advantages: sealing shroud is connected and tightens with lower contact by screw thread, tightness is strong, and top connection upper end and lower union joint lower end all adopt oil pipe round thread, is conveniently connected with oil pipe and other instruments.From in oil pipe by pressurizeing again, cut off shear pin, annular space is communicated with, reach tubing and casing and be communicated with, cover overflows to be increased, pressure drop, then upper lifting pipe post, overcoat, lower contact and following process pipe string thereof are lost in well, reached the object of giving up, simple to operate, by the said structure operating type reliability that guaranteed to give up, its reasonable in design, makes that device is simple, use cost is low, easy for installation, has saved the cost of production of device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In Fig. 1: 1-top connection, 2-shear pin, 3-sealing ring, 4-sealing ring A, 5-give up sliding sleeve, 6-sealing shroud, 7-sealing ring C, 8-lower contact.
The specific embodiment
Below in conjunction with Figure of description, further illustrate the present invention.
A kind of safe releasing tool for horizontal well, comprise top connection 1, shear pin 2, sealing ring 3, sealing ring A4, the sliding sleeve 5 of giving up, sealing shroud 6, sealing ring C7, lower contact 8, it is characterized in that the described seal groove at sealing shroud 6 is embedded in sealing ring C7, is then connected and tightens with lower contact 8 by screw thread; Sealing ring A4 is embedded in the seal groove of top connection 1, sealing ring 3 is embedded in the seal groove of the sliding sleeve 5 of giving up; The lower end of top connection 1 is installed in the inside groove of sealing shroud 6, and the sliding sleeve 5 of giving up of first-class sealing ring 3 is installed in the endoporus of top connection 1, the bottom that makes top connection 1 is just in the inside groove of indentation sealing cover 6.Screwed hole by shear pin 2 by top connection 1 is installed in the shear pin groove of the sliding sleeve 5 of giving up.
Claims (2)
1. the safe releasing tool for horizontal well, comprise top connection, shear pin, sealing ring, sealing ring A, the sliding sleeve of giving up, sealing shroud, sealing ring C, lower contact, the seal groove that it is characterized in that described sealing shroud is embedded in sealing ring C, by screw thread, be connected and tighten with lower contact, sealing ring A embeds in the seal groove of top connection, sealing ring is embedded in the seal groove of the sliding sleeve of giving up, the lower end of top connection is installed in the inside groove of sealing shroud, the sliding sleeve of giving up of first-class sealing ring is installed in the endoporus of top connection, shear pin is installed in the shear pin groove of the sliding sleeve of giving up by the screwed hole of top connection.
2. a kind of safe releasing tool for horizontal well according to claim 1, is characterized in that described sealing ring has 4, and described sealing ring A and sealing ring C respectively have respectively 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351622.XA CN103670311A (en) | 2012-09-19 | 2012-09-19 | Safe releasing tool for horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351622.XA CN103670311A (en) | 2012-09-19 | 2012-09-19 | Safe releasing tool for horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103670311A true CN103670311A (en) | 2014-03-26 |
Family
ID=50309001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210351622.XA Pending CN103670311A (en) | 2012-09-19 | 2012-09-19 | Safe releasing tool for horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103670311A (en) |
-
2012
- 2012-09-19 CN CN201210351622.XA patent/CN103670311A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |