CN104775786A - Double-tube flow dividing constant-pressure setting device - Google Patents
Double-tube flow dividing constant-pressure setting device Download PDFInfo
- Publication number
- CN104775786A CN104775786A CN201410012191.3A CN201410012191A CN104775786A CN 104775786 A CN104775786 A CN 104775786A CN 201410012191 A CN201410012191 A CN 201410012191A CN 104775786 A CN104775786 A CN 104775786A
- Authority
- CN
- China
- Prior art keywords
- tube
- central tube
- level pressure
- setting device
- interior
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 20
- 238000012856 packing Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 238000002347 injection Methods 0.000 abstract description 14
- 239000007924 injection Substances 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011064 split stream procedure Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a double-tube flow dividing constant-pressure setting device. The device comprises an upper joint, a lower joint and a central tube. The upper end and the lower end of the central tube are connected with the upper joint and the lower joint respectively. The setting device further comprises an inner tube sealing plug and a connecting sleeve, wherein the inner tube sealing plug is inserted into the central tube downwards from an opening of the upper joint, and the lower end of the inner tube sealing plug abuts against a locator formed on the inner wall of the lower joint. A lower injection channel is formed in an inner cavity of the inner tube sealing plug, and the outer side of the central tube is sleeved by the connecting sleeve; the upper end and the lower end of the connecting sleeve are connected to the upper joint and the lower joint respectively; an annulus upper injection channel is formed between the connecting sleeve and the central tube; and a temporary plugging switch is arranged in the upper injection channel. An inner sealing ladder-type packing is arranged on the outer wall of the upper end of the central tube, and the inner sealing ladder-type packing is arranged between the outer wall of the inner tube sealing plug and the central tube for sealing. It is ensured that full setting can be carried out on a double-tube water injection packer, and effective flow dividing at the shaft bottom is also ensured; and meanwhile, effective sealing between two tubes under the normal condition can be met.
Description
Technical field
The present invention relates to downhole hardware, the setting device of especially a kind of two-tube shunting level pressure.
Background technology
Concentric double pipe water filling can realize effective seperated layer water injection of large pressure reduction oil reservoir, and ground is allocated, and has to survey to adjust simple, the accurate feature of injection allocation, does not need to carry out separately test allotment simultaneously, saves a large amount of workloads.Therefore, two-tube water filling is compared and is suitable for field use at sea.Current concentric double pipe water injection technology has met the requirement of offshore oilfield security control in security control, concentric double pipe water injection technology at sea oil field obtain effective enforcement.But can't make at present concentric double pipe water injection packer obtain fully setting while play again the effect of split stream of injected water.
Summary of the invention
The object of the present invention is to provide the setting device of two-tube shunting level pressure, ensure that two-tube water injection packer obtains fully setting, ensured again effective shunting in shaft bottom, meet simultaneously two-tube under normal circumstances between effective sealing.
In order to reach above-mentioned purpose, present invention employs following technical scheme, the setting device of two-tube shunting level pressure, comprise top connection, lower contact, central tube, the upper and lower two ends of described central tube connect top connection and lower contact respectively, also comprise interior seal of tube plug, adapter sleeve, and described interior seal of tube plug down inserts in central tube from top connection upper shed, and the lower end of interior seal of tube plug is connected on the positioning table that lower contact inwall offers, described interior seal of tube plug inner chamber forms bet passage; Described adapter sleeve is enclosed within outside central tube, and adapter sleeve upper and lower side is connected in lower contact, is formed on annular space and note passage between described adapter sleeve and central tube, arranges stifled switch temporarily in described upper note passage.
Described central tube upper end outer wall arranges interior sealing ladder type packing, and described interior sealing ladder type packing_seal is between interior seal of tube plug outer wall and central tube.
Also form annulus access between described top connection and interior seal of tube plug, this passage is communicated with described upper note passage by the through hole that top connection is offered; Described adapter sleeve outer wall and be positioned at temporarily stifled switch lower position and offer the upper orifice being communicated with upper note passage.
Described stifled switch temporarily comprises the level pressure piston be blocked in note passage, and described level pressure piston is temporarily fixed on central tube by level pressure shear pin, and the below of described level pressure piston sets gradually outer packing, interior packing.
The annular space radial distance of the described stifled position of switch residing for upper note passage is temporarily less than the annular space radial distance noting other positions of passage.
The screw thread for connecting interior pipe is offered in the upper end of described interior seal of tube plug, is provided with backing-up screw, is also provided with backing-up screw between described lower contact and central tube between described top connection and central tube.
Compared to prior art, the present invention has following beneficial effect:
The setting device of the present invention's two-tube shunting level pressure, it is fully setting that namely this design ensure that two-tube water injection packer obtains, and ensured again effective shunting in shaft bottom, meet simultaneously two-tube under normal circumstances between effective sealing.Interior seal of tube plug adopts hollow light tube form, avoids the wearing and tearing that outer packing-type sealing plug is gone into the well in process.
Accompanying drawing explanation
Fig. 1 is the structure chart of the setting device of two-tube shunting level pressure of the present invention.
In figure: interior seal of tube plug 1, top connection 2, adapter sleeve 3, central tube 4, interior sealing ladder type packing 5, level pressure shear pin 6, level pressure piston 7, outer packing 8, interior packing 9, lower contact 10.
Detailed description of the invention
Detailed description for the present invention and technology contents, coordinate accompanying drawing to be described as follows, but accompanying drawing only provides with reference to the use with explanation, is not used for being limited the present invention.
As shown in Figure 1, the setting device of two-tube shunting level pressure, comprise top connection 2, lower contact 10, central tube 4, the upper and lower two ends of described central tube connect top connection and lower contact respectively, also comprise interior seal of tube plug 1, adapter sleeve 3, described interior seal of tube plug down inserts in central tube from top connection upper shed, and the lower end of interior seal of tube plug is connected on the positioning table that lower contact inwall offers, and described interior seal of tube plug inner chamber forms bet passage; Described adapter sleeve is enclosed within outside central tube, and adapter sleeve upper and lower side is connected in lower contact, is formed on annular space and note passage between described adapter sleeve and central tube, arranges stifled switch temporarily in described upper note passage.Described central tube upper end outer wall arranges interior sealing ladder type packing 5, and described interior sealing ladder type packing_seal is between interior seal of tube plug outer wall and central tube.Also form annulus access between described top connection and interior seal of tube plug, this passage is communicated with described upper note passage by the through hole that top connection is offered; Described adapter sleeve outer wall and be positioned at temporarily stifled switch lower position and offer the upper orifice being communicated with upper note passage.The screw thread for connecting interior pipe is offered in the upper end of described interior seal of tube plug, is provided with backing-up screw, is also provided with backing-up screw between described lower contact and central tube between described top connection and central tube.
Described stifled switch temporarily comprises the level pressure piston 7 be blocked in note passage, and described level pressure piston is temporarily fixed on central tube by level pressure shear pin 6, and the below of described level pressure piston sets gradually outer packing 8, interior packing 9.The annular space radial distance of the described stifled position of switch residing for upper note passage is temporarily less than the annular space radial distance noting other positions of passage.
In concentric double pipe water injection string, the setting device of two-tube shunting level pressure is connected with outer tube, when putting in place under outer tube, under enter interior pipe, interior seal of tube plug 1 is connected to interior pipe bottom, when interior seal of tube plug 1 time device setting to two-tube shunting level pressure, just in time with in the setting device of two-tube shunting level pressure seal ladder type packing 5 fitted seal completely.Interior pipe water filling directly injects lower floor through interior seal of tube plug 1; Interior pipe and the side opening of outer tube annulus water injection on the setting device of two-tube shunting level pressure enter into the annular section of adapter sleeve 3 and central tube 4, water injection pressure is applied directly on level pressure piston 7, the completely setting of annular packer can be realized, after packer set completes, continue pressurization and cut off level pressure shear pin 6, level pressure piston moves away sealing surface 7 times, opens waterflood path, inject water and enter upper strata, complete the effect of packer set and shunting.
The foregoing is only preferred embodiment of the present invention, be not used to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (6)
1. the setting device of two-tube shunting level pressure, comprise top connection, lower contact, central tube, the upper and lower two ends of described central tube connect top connection and lower contact respectively, it is characterized in that, also comprise interior seal of tube plug, adapter sleeve, described interior seal of tube plug down inserts in central tube from top connection upper shed, and the lower end of interior seal of tube plug is connected on the positioning table that lower contact inwall offers, and described interior seal of tube plug inner chamber forms bet passage; Described adapter sleeve is enclosed within outside central tube, and adapter sleeve upper and lower side is connected in lower contact, is formed on annular space and note passage between described adapter sleeve and central tube, arranges stifled switch temporarily in described upper note passage.
2. the setting device of two-tube shunting level pressure according to claim 1, is characterized in that, described central tube upper end outer wall arranges interior sealing ladder type packing, and described interior sealing ladder type packing_seal is between interior seal of tube plug outer wall and central tube.
3. the setting device of two-tube shunting level pressure according to claim 1, is characterized in that, also forms annulus access between described top connection and interior seal of tube plug, and this passage is communicated with described upper note passage by the through hole that top connection is offered; Described adapter sleeve outer wall and be positioned at temporarily stifled switch lower position and offer the upper orifice being communicated with upper note passage.
4. the setting device of two-tube shunting level pressure according to claim 1, it is characterized in that, described stifled switch temporarily comprises the level pressure piston be blocked in note passage, and described level pressure piston is temporarily fixed on central tube by level pressure shear pin, and the below of described level pressure piston sets gradually outer packing, interior packing.
5. the setting device of two-tube shunting level pressure according to claim 1, is characterized in that, the annular space radial distance of the described stifled position of switch residing for upper note passage is temporarily less than the annular space radial distance noting other positions of passage.
6. the setting device of two-tube shunting level pressure according to claim 1, it is characterized in that, the screw thread for connecting interior pipe is offered in the upper end of described interior seal of tube plug, is provided with backing-up screw, is also provided with backing-up screw between described lower contact and central tube between described top connection and central tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410012191.3A CN104775786B (en) | 2014-01-11 | 2014-01-11 | The two-tube shunting setting device of level pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410012191.3A CN104775786B (en) | 2014-01-11 | 2014-01-11 | The two-tube shunting setting device of level pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104775786A true CN104775786A (en) | 2015-07-15 |
| CN104775786B CN104775786B (en) | 2018-03-23 |
Family
ID=53617510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410012191.3A Expired - Fee Related CN104775786B (en) | 2014-01-11 | 2014-01-11 | The two-tube shunting setting device of level pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104775786B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842346A (en) * | 2016-09-20 | 2018-03-27 | 中国石油化工股份有限公司 | A kind of oil-water well combined type is intubated internal sealed seating nipple |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787865A (en) * | 2010-01-11 | 2010-07-28 | 中国石油化工股份有限公司 | Midway setting-proof permanent packer |
| CN202690023U (en) * | 2012-07-05 | 2013-01-23 | 中国石油化工股份有限公司 | Inside seal type flow divider |
| CN102979481A (en) * | 2012-12-18 | 2013-03-20 | 中国石油天然气股份有限公司 | Anti-blocking constant pressure switch of water injection pipe column |
| CN203248137U (en) * | 2013-05-17 | 2013-10-23 | 中国石油化工股份有限公司 | Double-pipe constant-flow water distribution control device |
-
2014
- 2014-01-11 CN CN201410012191.3A patent/CN104775786B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787865A (en) * | 2010-01-11 | 2010-07-28 | 中国石油化工股份有限公司 | Midway setting-proof permanent packer |
| CN202690023U (en) * | 2012-07-05 | 2013-01-23 | 中国石油化工股份有限公司 | Inside seal type flow divider |
| CN102979481A (en) * | 2012-12-18 | 2013-03-20 | 中国石油天然气股份有限公司 | Anti-blocking constant pressure switch of water injection pipe column |
| CN203248137U (en) * | 2013-05-17 | 2013-10-23 | 中国石油化工股份有限公司 | Double-pipe constant-flow water distribution control device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107842346A (en) * | 2016-09-20 | 2018-03-27 | 中国石油化工股份有限公司 | A kind of oil-water well combined type is intubated internal sealed seating nipple |
| CN107842346B (en) * | 2016-09-20 | 2020-07-03 | 中国石油化工股份有限公司 | Sealed working barrel in composite type insertion pipe of oil-water well |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104775786B (en) | 2018-03-23 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
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Granted publication date: 20180323 Termination date: 20210111 |