CN202325408U - Outer sliding sleeve reverse circulation short section - Google Patents

Outer sliding sleeve reverse circulation short section Download PDF

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Publication number
CN202325408U
CN202325408U CN 201120419658 CN201120419658U CN202325408U CN 202325408 U CN202325408 U CN 202325408U CN 201120419658 CN201120419658 CN 201120419658 CN 201120419658 U CN201120419658 U CN 201120419658U CN 202325408 U CN202325408 U CN 202325408U
Authority
CN
China
Prior art keywords
boss
sliding sleeve
core
sleeve
barrel
Prior art date
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
Application number
CN 201120419658
Other languages
Chinese (zh)
Inventor
蒋西平
王龙屏
胡新兴
刘志良
陈涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNPC Xibu Drilling Engineering Co Ltd
Original Assignee
CNPC Xibu Drilling Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CNPC Xibu Drilling Engineering Co Ltd filed Critical CNPC Xibu Drilling Engineering Co Ltd
Priority to CN 201120419658 priority Critical patent/CN202325408U/en
Application granted granted Critical
Publication of CN202325408U publication Critical patent/CN202325408U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to the technical field of reverse circulation well press tools, in particular to an outer sliding sleeve reverse circulation short section. The outer sliding sleeve reverse circulation short section comprises an inner barrel, an outer sliding sleeve, an outer barrel and a compression spring, wherein an upper boss, of which the outer diameter is greater than that of the inner barrel, is fixed at the upper end of the inner barrel; a first boss, of which the inner diameter is greater than that of the outer barrel, is fixed on the outer side of the upper end of the outer barrel; a second boss, of which the inner diameter is greater than that of the first boss, is fixed on the outer side of the upper end of the first boss; the lower end of the inner barrel is fixedly arranged in the first boss; the lower part of the outer sliding sleeve is sleeved in an annular cavity between the inner barrel and the second boss; the compression spring is arranged in the annular cavity below the outer sliding sleeve; at least one radial inner hole is formed in the inner barrel above the second boss; and a radial outer hole is formed in the outer sliding sleeve above the radial inner hole. The outer sliding sleeve reverse circulation short section has a reasonable and compact structure, and is convenient to use; and due to the matching between the outer sliding sleeve and the compression spring, a reverse circulation valve can be opened repeatedly, so that the accuracy of various tests of oil extraction work is improved.

Description

The outer sliding sleeve reverse circulating sub
Technical field
the utility model relates to anti-circulation kill-job technical field of tools, is a kind of outer sliding sleeve reverse circulating sub.
Background technology
Well stimulation commonly used is to adopt the pressure break mode after present petroleum gas completion, and the serious sand plug situation of the normal generation of fracturing work process, for setting up inside and outside fluid course; External pressure open-type reverse circulation valve at present commonly used, it is positioned at fracturing string safety joint top, and its effect is when serious sand plug takes place; Open reverse circulation valve through building the pressure at annular space; The backwash of pit shaft sand is come out, remove sand plug, necessary condition is provided for going on foot the continuation construction down.But; At present this reverse circulation valve can only disposable opening, and can not close after opening, and this just causes in follow-up oil recovery process; Annular space and oil pipe internal communication can't accurately be carried out oil pressure, casing pressure monitoring and brought very big inconvenience for normal (gas) operation of recovering the oil.
Summary of the invention
the utility model provides a kind of outer sliding sleeve reverse circulating sub, has overcome the deficiency of above-mentioned prior art, and it can effectively solve the problem that can't close after reverse circulation valve is opened.
The technical scheme of the utility model realizes through following measure: a kind of outer sliding sleeve reverse circulating sub comprises inner core, outer sliding sleeve, urceolus and compression spring; The upper end of inner core is fixed with the convex platform of external diameter greater than the inner core external diameter; The outside, upper end of urceolus is fixed with first boss of internal diameter greater than the urceolus internal diameter; The outside, upper end at first boss is fixed with second boss of internal diameter greater than the first boss internal diameter; The lower end of inner core is fixedly mounted in first boss, and the bottom of outer sliding sleeve is sleeved in the ring cavity between the inner core and second boss, and the compression spring is installed in the ring cavity below outer sliding sleeve; The radial bore that at least one is arranged on the inner core above second boss; Outwards hole, footpath is arranged on the outer sliding sleeve above the radial bore, and the upper end inwall of convex platform has screw thread, and the lower end outer wall of urceolus has screw thread.
Be to the further optimization of above-mentioned utility model technical scheme below or/and improve:
above-mentioned outer sliding sleeve can comprise tops bar and sleeve; Inboard upper end with sleeve, the lower end of topping bar is fixed together; The external diameter of topping bar has outwards hole, footpath, in the ring cavity of sleeve set between the inner core and second boss greater than the external diameter of sleeve on topping bar.
above-mentioned inner core lower end can be fixedly mounted in first boss through screw thread or welding.
Between the sleeve of above-mentioned compression spring top and second boss sealing ring can be installed.
Between the above-mentioned inner core and first boss sealing ring can be installed.
the utility model reasonable and compact in structure, easy to use, through the cooperation of outer sliding sleeve, can realize that reverse circulation valve opens repeatedly with the compression spring, therefore improved the accuracy of oil extraction operation each item test.
Description of drawings
accompanying drawing 1 is looked the half section structural representation for the master of the utility model most preferred embodiment.
Coding in accompanying drawing is respectively: 1 is inner core, and 2 is convex platform, and 3 is urceolus, and 4 is first boss, and 5 is second boss, and 6 are the compression spring, and 7 is radial bore, and 8 is outwards hole, footpath, and 9 for topping bar, and 10 is sleeve, and 11 is sealing ring.
The specific embodiment
the utility model does not receive the restriction of following embodiment, can confirm concrete embodiment according to the technical scheme and the actual conditions of the utility model.
are in the utility model; For the ease of describing; The description of the relative position relation of each parts all is to describe according to the Butut mode of Figure of description 1, as: the position relation of forward and backward, upper and lower, left and right etc. is what to confirm according to the Butut direction of Figure of description.
Below in conjunction with embodiment and accompanying drawing the utility model is further described:
shown in accompanying drawing 1, this outer sliding sleeve reverse circulating sub comprises inner core 1, outer sliding sleeve, urceolus 3 and compression spring 6; The upper end of inner core 1 is fixed with the convex platform 2 of external diameter greater than the inner core external diameter; The outside, upper end of urceolus 3 is fixed with first boss 4 of internal diameter greater than the urceolus internal diameter; The outside, upper end at first boss 4 is fixed with second boss 5 of internal diameter greater than first boss, 4 internal diameters; The lower end of inner core 1 is fixedly mounted in first boss 4, and the bottom of outer sliding sleeve is sleeved in the ring cavity between the inner core 1 and second boss 5, and compression spring 6 is installed in the ring cavity below outer sliding sleeve; The radial bore 7 that at least one is arranged on the inner core 1 above second boss 5; Outwards hole 8, footpath is arranged on the outer sliding sleeve above the radial bore 7, and the upper end inwall of convex platform 2 has screw thread, and the lower end outer wall of urceolus 3 has screw thread.Through compression spring 6 is installed in the ring cavity between second boss 5 and inner core 1; When annular space builds the pressure; Pressure outwards promotes outer sliding sleeves and moves down in hole 8 through the footpath, outer sliding sleeve axial compression compression spring 6, with the radial bore 7 on outside hole 8, the footpath on the outer sliding sleeve and the inner core and inner core 1 inside communicate rush down pressure after; Outer sliding sleeve comes back to original state under the active force of compression spring 6, realize the purpose of opening and closing.
Can according to actual needs above-mentioned outer sliding sleeve reverse circulating sub be done further to optimize or/and improve:
are shown in accompanying drawing 1; Outer sliding sleeve comprise top bar 9 with sleeve 10; The inboard upper end with sleeve 10,9 lower end of topping bar is fixed together; Top bar 9 external diameter greater than the external diameter of sleeve 10, outwards hole 8, footpath is arranged on 9 topping bar, sleeve 10 is sleeved in the ring cavity between the inner core 1 and second boss 5.After outer sliding sleeve went downwards to a certain degree, second boss, 5 upper ends offseted with 9 lower outside of topping bar.
Shown in accompanying drawing 1, inner core 1 lower end is fixedly mounted in first boss 4 through screw thread or welding .To guarantee instrument not slippage in going into the well process.
are equipped with sealing ring 11 between the sleeve 10 of compression spring 6 tops and second boss 5 shown in accompanying drawing 1.
are equipped with sealing ring 11 between the inner core 1 and first boss 4 shown in accompanying drawing 1.
above technical characterictic has constituted the most preferred embodiment of the utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.

Claims (9)

1. an outer sliding sleeve reverse circulating sub is characterized in that comprising inner core, outer sliding sleeve, urceolus and compression spring; The upper end of inner core is fixed with the convex platform of external diameter greater than the inner core external diameter; The outside, upper end of urceolus is fixed with first boss of internal diameter greater than the urceolus internal diameter; The outside, upper end at first boss is fixed with second boss of internal diameter greater than the first boss internal diameter; The lower end of inner core is fixedly mounted in first boss, and the bottom of outer sliding sleeve is sleeved in the ring cavity between the inner core and second boss, and the compression spring is installed in the ring cavity below outer sliding sleeve; The radial bore that at least one is arranged on the inner core above second boss; Outwards hole, footpath is arranged on the outer sliding sleeve above the radial bore, and the upper end inwall of convex platform has screw thread, and the lower end outer wall of urceolus has screw thread.
2. outer sliding sleeve reverse circulating sub according to claim 1; It is characterized in that outer sliding sleeve comprises tops bar and sleeve; Inboard upper end with sleeve, the lower end of topping bar is fixed together; The external diameter of topping bar has outwards hole, footpath, in the ring cavity of sleeve set between the inner core and second boss greater than the external diameter of sleeve on topping bar.
3. outer sliding sleeve reverse circulating sub according to claim 1 and 2 is characterized in that the inner core lower end is fixedly mounted in first boss through screw thread or welding.
4. outer sliding sleeve reverse circulating sub according to claim 2 is characterized in that compressing between sleeve and second boss of spring top sealing ring is installed.
5. outer sliding sleeve reverse circulating sub according to claim 3 is characterized in that compressing between sleeve and second boss of spring top sealing ring is installed.
6. outer sliding sleeve reverse circulating sub according to claim 1 and 2 is characterized in that between the inner core and first boss sealing ring being installed.
7. outer sliding sleeve reverse circulating sub according to claim 3 is characterized in that between the inner core and first boss sealing ring being installed.
8. outer sliding sleeve reverse circulating sub according to claim 4 is characterized in that between the inner core and first boss sealing ring being installed.
9. outer sliding sleeve reverse circulating sub according to claim 5 is characterized in that between the inner core and first boss sealing ring being installed.
CN 201120419658 2011-10-29 2011-10-29 Outer sliding sleeve reverse circulation short section Expired - Lifetime CN202325408U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120419658 CN202325408U (en) 2011-10-29 2011-10-29 Outer sliding sleeve reverse circulation short section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201120419658 CN202325408U (en) 2011-10-29 2011-10-29 Outer sliding sleeve reverse circulation short section

Publications (1)

Publication Number Publication Date
CN202325408U true CN202325408U (en) 2012-07-11

Family

ID=46437390

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201120419658 Expired - Lifetime CN202325408U (en) 2011-10-29 2011-10-29 Outer sliding sleeve reverse circulation short section

Country Status (1)

Country Link
CN (1) CN202325408U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103615214A (en) * 2013-11-21 2014-03-05 中国石油集团西部钻探工程有限公司 Cavity-shell type reverse circulation valve
CN104747117A (en) * 2013-12-25 2015-07-01 中国石油化工股份有限公司 Underground blowout prevention device
CN112360374A (en) * 2020-12-01 2021-02-12 中国石油天然气股份有限公司 Reverse circulation valve capable of being opened repeatedly and using method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103615214A (en) * 2013-11-21 2014-03-05 中国石油集团西部钻探工程有限公司 Cavity-shell type reverse circulation valve
CN103615214B (en) * 2013-11-21 2016-06-01 中国石油集团西部钻探工程有限公司 Chamber shell type reverse circulation valve
CN104747117A (en) * 2013-12-25 2015-07-01 中国石油化工股份有限公司 Underground blowout prevention device
CN104747117B (en) * 2013-12-25 2018-07-17 中国石油化工股份有限公司 A kind of underground blow-out preventing device
CN112360374A (en) * 2020-12-01 2021-02-12 中国石油天然气股份有限公司 Reverse circulation valve capable of being opened repeatedly and using method thereof

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C14 Grant of patent or utility model
CX01 Expiry of patent term

Granted publication date: 20120711

CX01 Expiry of patent term