CN105134143A - Oil jacket dividing and balancing blowout prevention tubular column for injection well work - Google Patents
Oil jacket dividing and balancing blowout prevention tubular column for injection well work Download PDFInfo
- Publication number
- CN105134143A CN105134143A CN201510549980.5A CN201510549980A CN105134143A CN 105134143 A CN105134143 A CN 105134143A CN 201510549980 A CN201510549980 A CN 201510549980A CN 105134143 A CN105134143 A CN 105134143A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- telescopic
- oil jacket
- top connection
- oil
- 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
Landscapes
- Earth Drilling (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to the field of oil fields, in particular to an oil jacket dividing and balancing blowout prevention tubular column for injection well work. The tubular column comprises a casting tube, an oil tube is arranged in the casing tube, and an annular cavity between the casing tube and the oil tube is divided by a plurality of packers into different layer positions. Each layer position is correspondingly provided with an injection allocation device, the upper portion of the first packer is connected with an oil jacket divider, the lower portion of the injection allocation device on the lowest layer is connected with a telescopic multifunctional tail tube, and the lower end of the telescopic multifunctional tail tube is connected with a screen tube and a guide cone in sequence. According to the oil jacket dividing and balancing blowout prevention tubular column for injection well work, the oil jacket divider slides through pressure before the work, a dividing sleeve moves downwards, a liquid flow channel in the oil tube and a liquid flow channel in the annular cavity of the oil jacket are communicated, balanced dividing is achieved, the influence of injection well normal-pressure work construction on surroundings is reduced to the maximum degree, and the requirements of the new environmental protection act are met.
Description
Technical field
The present invention relates to oilfield, is that a kind of Injection Well operation oil jacket divides mobile equilibrium lubricator post specifically.
Background technology
The Injection Well operation of current oil field mainly contains Operating Pressure and normal pressure operation two kinds, although application Operating Pressure achieves arrange operation, there is the problems such as construction cost is high, efficiency of construction is low, about 9 days average individual well used time, is difficult to meet need of production.And normal pressure operation wellhead spillway discharge is comparatively large, the greasy dirt especially sprayed in oil pipe in lower oil tube process is difficult to reclaim, and to well site ambient influnence is comparatively large, cannot meet new Law on Environmental Protection requirement around.
Summary of the invention
(1) technical problem to be solved
The invention provides a kind of Injection Well operation oil jacket and divide mobile equilibrium lubricator post, in order to overcome, the construction cost existed in prior art is high, efficiency of construction is low and to well site ambient influnence is comparatively large, cannot meet the defect that new Law on Environmental Protection requires around.
Summary of the invention
(2) technical scheme
The invention provides a kind of Injection Well operation oil jacket and divide mobile equilibrium lubricator post, comprise sleeve pipe, inside pipe casing is provided with oil pipe, described sleeve pipe becomes different layer positions from the annular space chamber between oil pipe by several packer isolates, the each layer of equal correspondence in position arranges distributor, above first packer, connect oil jacket current divider, connect telescopic multi-function tail pipe below orlop distributor, telescopic multi-function tail pipe lower end connects screen casing and starting taper successively;
Wherein, telescopic multifunctional tail pipe comprises the first top connection, and described first top connection is internally connected with shutoff ball seat, and shutoff ball seat inside is provided with the conical surface, and the conical surface and the first ball sealer match, and are connected with shutoff turnover panel bottom shutoff ball seat; Overcoat is connected with bottom described first top connection, first top connection, between overcoat and shutoff ball seat, be provided with piston, boss is provided with outside piston base, jacket internal is provided with telescopic, telescopic internal whorl is connected with support bar, the telescopic inwall on support bar top is fixed with supporting seat, and supporting seat is positioned at bottom shutoff turnover panel; Have liquid pass hole in the middle part of described telescopic, and the outside at liquid pass hole place is connected with sliding sleeve by pin, telescopic bottom connects two-way valve top connection, is provided with spring between sliding sleeve and two-way valve top connection; Described two-way valve top connection bottom inside is matched with the second ball sealer by the conical surface, and two-way valve top connection bottom is connected with the first lower contact, is connected with turnover panel inside the first lower contact;
Oil jacket current divider comprises the second top connection, outer adapter sleeve, the first Clip Reed, slip diversion sleeve, fixing pin and the second lower contact;
Described second top connection is threaded with outer adapter sleeve; Described second lower contact and outer adapter sleeve are threaded; Gingival cyst of mucous gland in the newborn button is provided with in outer adapter sleeve; Gingival cyst of mucous gland in the newborn button is provided with in slip diversion sleeve; Slip diversion sleeve is provided with the first Clip Reed, described slip diversion sleeve along outer adapter sleeve internal slide, the unidirectional step lock of gingival cyst of mucous gland in the newborn button on the first Clip Reed and outer adapter sleeve; Fixing pin is fixed on slip diversion sleeve and outer adapter sleeve.
Preferably, O RunddichtringO is provided with between described outer adapter sleeve and slip diversion sleeve.
Preferably, described telescopic outer surface of cupular part periphery has projection, and the bottom surface of projection is for facing directly, is inclined-plane above, described outer casing inner wall has the groove matched with above-mentioned projection.
(3) beneficial effect
The invention provides a kind of Injection Well operation oil jacket and divide mobile equilibrium lubricator post, owing to taking such scheme, before operation, making oil jacket current divider slip diversion sleeve descending by suppressing, with the fluid course of oil jacket annular space in conducting oil pipe, realize balance shunting.By improving pressure, make diverting means bruising block up lower ball base descending, lose two-way function, in tubing string more than spheroid, liquid can enter oil jacket annular space by instrument, and the liquid below spheroid cannot enter in the oil pipe of more than spheroid.Upper lifting pipe post deblocking packer during operation, solution lower intensification of being honored as a queen tags, and is clashed into by starting taper and artificial bottom of a well, make telescopic multi-function tail pipe compression, spheroid is sent in ball sealer base device, form one way valve, when tubing string is carried, spring backs down sliding sleeve, and oil jacket is communicated with.During lift pipe string; in tubing string more than spheroid, liquid enters oil jacket annular space by this valve; and the liquid below spheroid cannot enter in the oil pipe of more than spheroid, the impact at utmost on surrounding environment during reduction Injection Well normal pressure job execution, meets the requirement of new Law on Environmental Protection.
Accompanying drawing explanation
Fig. 1 is that Injection Well operation oil jacket of the present invention divides mobile equilibrium lubricator rod structure schematic diagram;
Fig. 2 is oil jacket diversion structure schematic diagram of the present invention;
Fig. 3 is that structural representation is blocked up in diverting means bruising of the present invention;
Fig. 4 is that fitted seal schematic diagram is blocked up in oil jacket current divider of the present invention and diverting means bruising;
Fig. 5 is descending for suppressing sliding sleeve, and following oil jacket connectivity structure schematic diagram is blocked up in diverting means bruising;
To block up lower valve base descending in order to continue to suppress diverting means bruising for Fig. 6, the flow channels conducting structure schematic diagram of oil pipe more than spheroid and sleeve pipe;
Fig. 7 is telescopic multi-function stern construction schematic diagram.
In figure: 1-sleeve pipe, 2-oil pipe, 3-oil jacket diverting means, 4-packer, 5-distributor, the telescopic multi-function tail pipe of 6-, 7-screen casing, 8-starting taper, 9-second top connection, the outer adapter sleeve of 10-, 11-first Clip Reed, 12-slip diversion sleeve, 13-O RunddichtringO, 14-fixing pin, 15-second lower contact, 16-sealing shroud, 17-second Clip Reed, 18-O RunddichtringO, 19-upper ball base, 20-steel ball, 21-lower ball base, 22-diversion sleeve, 23-adapter sleeve, 24-nose cone, 25-first top connection, 26-jump ring, 27-shutoff ball seat, 28-piston, 29-overcoat, 30-shutoff turnover panel, 31-first ball sealer, 32-supporting seat, 33-support bar, 34-telescopic, 35-pin, 36-sliding sleeve, 37-spring, the top connection of 38-two-way valve, 39-second ball sealer, 40-turnover panel, 41-first lower contact.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
Shown in Fig. 1 to Fig. 7, the invention provides a kind of Injection Well operation oil jacket and divide mobile equilibrium lubricator post, comprise sleeve pipe 1, there is oil pipe 1 sleeve pipe 1 inside, described sleeve pipe 1 is separated into different layer positions from the annular space between oil pipe 2 by several packers 4, and each layer of equal correspondence in position arranges distributor 5, above first (first order) packer, connect oil jacket current divider 3, connect telescopic multi-function tail pipe 6 below orlop distributor, telescopic multi-function tail pipe 6 lower end connects screen casing 7 and starting taper 8 successively.
Wherein, telescopic multifunctional tail pipe 6, comprises the first top connection 25, and described top connection 25 is internally connected with shutoff ball seat 27, the inner side of shutoff ball seat 27 bottom is provided with taper seat, taper seat lower openings place is provided with the first ball sealer 31, and taper seat and the first ball sealer 31 match, and are connected with shutoff turnover panel 30 bottom shutoff ball seat 27, first ball sealer 31 can move up and down under the effect of external force, promote shutoff turnover panel 30 to overturn, make the first ball sealer 31 fall in shutoff ball seat 27, form one way valve.This one way valve has shutoff and earial drainage effect in pipe.In lift pipe string process, if below tubing string during hydraulic pressure height, the first ball sealer 31 is adjacent to the upper conical surface of shutoff ball seat 27, plays shutoff blowout prevention effect; When hydraulic pressure is low, the first ball sealer 31 is fallen on shutoff turnover panel 30, plays earial drainage effect.Overcoat 29 is connected with bottom described first top connection 25, first top connection 25, between overcoat 29 and shutoff ball seat 27, be provided with piston 28, piston 28 inner surface and shutoff ball seat 27 exterior surface, be connected by jump ring 26 between piston 28 top with the first top connection 25, be provided with boss in the middle part of piston 28 external surface, fixed by pin between boss external surface and overcoat.
Overcoat 29 inside is provided with telescopic 34, telescopic 34 top is holding card mechanism, namely telescopic 34 outer surface of cupular part periphery has projection, and the bottom surface of projection is for facing directly, be inclined-plane above, overcoat 29 inwall has the groove matched with above-mentioned projection, make telescopic 34 slide so far position time, projection may be stuck in groove.Telescopic 34 internal whorl is connected with support bar 33, telescopic 34 inwall on support bar 33 top is fixed with supporting seat 32, and supporting seat 32 is positioned at bottom shutoff turnover panel 30; Above-mentioned support bar 33 supporting seat 32 all has through hole in the axial direction.In the middle part of described telescopic 34, sidewall has liquid pass hole, and the outside at liquid pass hole place is connected with sliding sleeve 36 by pin 35, telescopic 34 bottom connects two-way valve top connection 38, is provided with spring 37 between sliding sleeve 36 and two-way valve top connection 38.Described two-way valve top connection 38 bottom inside is provided with the conical surface, and the conical surface matches with the second ball sealer 39, and two-way valve top connection 38 bottom is connected with inside the first lower contact 41, first lower contact 41 and is connected with turnover panel 30.
Oil jacket current divider 3 comprises the second top connection 9, outer adapter sleeve 10, first Clip Reed 11, slip diversion sleeve 12, fixing pin 14 and the second lower contact 15.
Described second top connection 15 is threaded with outer adapter sleeve 10; Described second lower contact 15 and outer adapter sleeve 10 are threaded; Gingival cyst of mucous gland in the newborn button is provided with in outer adapter sleeve 10; Gingival cyst of mucous gland in the newborn button is provided with in slip diversion sleeve 12; Slip diversion sleeve 12 is provided with the first Clip Reed 11, described slip diversion sleeve 12 along outer adapter sleeve 10 internal slide, the unidirectional step lock of gingival cyst of mucous gland in the newborn button on the first Clip Reed 11 and outer adapter sleeve 10; Fixing pin 14 is fixed on slip diversion sleeve 12 and outer adapter sleeve 10, is provided with O RunddichtringO 13 between described outer adapter sleeve 10 and slip diversion sleeve 12.
When lower tubular column, shown in Fig. 1, connected pipes and instrument successively from bottom to top, is first connected to screen casing 8 and plug 9 on nethermost 1 oil pipe when ground, by Construction Scheme successively connected pipes.Transfer in tubing string process, the second ball sealer 39 holds out against the ball seat of two-way valve top connection 38 by the effect of turnover panel 40, prevents the inner feed liquor of tubing string in tubing string decentralization process, to realize in tubing string decentralization process in oil pipe without overflow.The upper end of telescopic 34 is holding card mechanism, is limited position by piston 28, guarantees, in the process of going into the well, relative motion occurs.
When suppressing releasing packer 4 after lower tubular column completes, under fluid power effect, the second ball sealer 39 is promoted turnover panel 40 and drop in the valve seat of the first lower contact 41, close under realizing injection state.While continuing to suppress and realizing packer setting, piston 28 moves, and by jump ring 26 monodirectional locking in the first top connection 25, to the follow-up slip headspace of telescopic 34.During anti-flushing well, the second ball sealer 39 by anti-flushing well liquid upwardly, but realized anti-flushing well function by turnover panel 40 stop.Shutoff turnover panel 30, supporting seat 32, support bar 33 were equipped with liquid passage, do not affect water injection well and normally produce and anti-flushing well.
Again before subjob, oil pipe is put into by test channel by stifled for the diverting means bruising of oil jacket diverting means 3, wherein, this bruising blocking package is drawn together: sealing shroud 16, second Clip Reed 17, upper ball base 19, steel ball 20, lower ball base 21, diversion sleeve 22, adapter sleeve 23 and nose cone 24 form; Sealing shroud 16 and diversion sleeve 22 are threaded; Adapter sleeve 23 and nose cone 24 are threaded; Described sealing shroud 16 and diversion sleeve 22 inside are provided with upper ball base 19, and described diversion sleeve 22 and adapter sleeve 23 inside are provided with lower ball base 21, are provided with steel ball 20 in the chamber that described upper ball base 19 and lower ball base 21 surround; Described steel ball 20 can move under external force; Described adapter sleeve 23 is made up of elastomeric material; Described sealing shroud 16 one end is provided with projection, and described projection is provided with the second Clip Reed 17.Sealing shroud 16 is provided with O RunddichtringO 18.
The Butt sealing of the effect of being stressed and oil jacket current divider 3 is blocked up in diverting means bruising, the second Clip Reed 17 that diverting means bruising is blocked up and the unidirectional step lock of gingival cyst of mucous gland in the newborn button of oil jacket current divider slip diversion sleeve 12, sharply raise with injection pressure, when injection pressure is increased to 15MPa, go up after there will be abrupt pressure reduction, the slip diversion sleeve 12 now balancing current divider is descending, the first Clip Reed 11 above slip diversion sleeve 12 and the unidirectional step lock of gingival cyst of mucous gland in the newborn button of outer adapter sleeve 10, the adapter sleeve 23 reducing place that after going downwards to bottom, diverting means bruising is blocked up contacts with the second lower contact 15 inner bore chamfering place of oil jacket current divider, continue to raise with pressure, adapter sleeve 23 reducing place spring detent is up compressed, as pressure rise 17MPa, abrupt pressure reduction to 0 does not go up, illustrate that the stifled steel ball 20 of diverting means bruising promotes lower ball base 21 descending, lose two-way valve effect, now can stop injecting, operation is waited in closing well step-down.
During operation, after upper lifting pipe post pulls out sealed packer 4, lower intensification tags, behind tubing string shock artificial bottom of a well, overcoat 29 promotes that sliding sleeve 36 is descending cuts off pin 35, Compress Spring 37, simultaneous retractable cover 34 drive support bars 33, supporting seat 32, first ball sealer 31 relatively tubing string move upward, back down shutoff turnover panel 30, the first ball sealer 31 is headed in shutoff ball seat 27.After this upper lifting pipe post, spring 37 recovers normal condition, and promotion telescopic 34, support bar 33, supporting seat 32 move downward, and spring 37 upwards backs down sliding sleeve 36 simultaneously, is exposed by the fluid course on telescopic 34, are communicated with fluid course between oil jacket.
In lift pipe string process, the liquid in tubing string above oil jacket diverting means 3 enters in oil jacket annular space by steel ball 20, and when fluid pressure is higher than top below it, promotion steel ball 20 is held out against upper ball base 19, cannot enter in the oil pipe above oil jacket diverting means 3.Simultaneously, liquid in tubing string between oil jacket diverting means 3 and telescopic multi-function tail pipe 6 enters in oil jacket annular space by the first ball sealer 31, and the liquid of oil jacket annular space cannot be entered in the oil pipe between oil jacket diverting means 3 and telescopic multi-function tail pipe 6 by the first ball sealer 31.
By application the present invention, while the normal production of guarantee and well-flushing function, realize in the oil pipe when playing lower tubular column above well head without overflow.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and replacement, these improve and replace and also should be considered as protection scope of the present invention.
Claims (3)
1. an Injection Well operation oil jacket divides mobile equilibrium lubricator post, it is characterized in that, comprise sleeve pipe, inside pipe casing is provided with oil pipe, described sleeve pipe becomes different layer positions from the annular space chamber between oil pipe by several packer isolates, and each layer of equal correspondence in position arranges distributor, connects oil jacket current divider above first packer, connect telescopic multi-function tail pipe below orlop distributor, telescopic multi-function tail pipe lower end connects screen casing and starting taper successively;
Wherein, telescopic multifunctional tail pipe comprises the first top connection, and described first top connection is internally connected with shutoff ball seat, and shutoff ball seat inside is provided with the conical surface, and the conical surface and the first ball sealer match, and are connected with shutoff turnover panel bottom shutoff ball seat; Overcoat is connected with bottom described first top connection, first top connection, between overcoat and shutoff ball seat, be provided with piston, boss is provided with outside piston base, jacket internal is provided with telescopic, telescopic internal whorl is connected with support bar, the telescopic inwall on support bar top is fixed with supporting seat, and supporting seat is positioned at bottom shutoff turnover panel; Have liquid pass hole in the middle part of described telescopic, and the outside at liquid pass hole place is connected with sliding sleeve by pin, telescopic bottom connects two-way valve top connection, is provided with spring between sliding sleeve and two-way valve top connection; Described two-way valve top connection bottom inside is matched with the second ball sealer by the conical surface, and two-way valve top connection bottom is connected with the first lower contact, is connected with turnover panel inside the first lower contact;
Oil jacket current divider comprises the second top connection, outer adapter sleeve, the first Clip Reed, slip diversion sleeve, fixing pin and the second lower contact;
Described second top connection is threaded with outer adapter sleeve; Described second lower contact and outer adapter sleeve are threaded; Gingival cyst of mucous gland in the newborn button is provided with in outer adapter sleeve; Gingival cyst of mucous gland in the newborn button is provided with in slip diversion sleeve; Slip diversion sleeve is provided with the first Clip Reed, described slip diversion sleeve along outer adapter sleeve internal slide, the unidirectional step lock of gingival cyst of mucous gland in the newborn button on the first Clip Reed and outer adapter sleeve; Fixing pin is fixed on slip diversion sleeve and outer adapter sleeve.
2. Injection Well operation oil jacket according to claim 1 divides mobile equilibrium lubricator post, it is characterized in that, is provided with O RunddichtringO between described outer adapter sleeve and slip diversion sleeve.
3. Injection Well operation oil jacket according to claim 1 divides mobile equilibrium lubricator post, it is characterized in that, described telescopic outer surface of cupular part periphery has projection, and the bottom surface of projection is for facing directly, be inclined-plane above, described outer casing inner wall have the groove matched with above-mentioned projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510549980.5A CN105134143B (en) | 2015-09-01 | 2015-09-01 | Inject well operations oil jacket shunting balance blowout prevention tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510549980.5A CN105134143B (en) | 2015-09-01 | 2015-09-01 | Inject well operations oil jacket shunting balance blowout prevention tubing string |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105134143A true CN105134143A (en) | 2015-12-09 |
| CN105134143B CN105134143B (en) | 2017-07-25 |
Family
ID=54719680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510549980.5A Active CN105134143B (en) | 2015-09-01 | 2015-09-01 | Inject well operations oil jacket shunting balance blowout prevention tubing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105134143B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107252A (en) * | 2019-06-03 | 2019-08-09 | 武汉亿达联创石油科技有限公司 | Down-hole switch and can real-time monitoring down-hole string system |
| CN112832711A (en) * | 2020-12-10 | 2021-05-25 | 中国石油天然气股份有限公司 | Flow control gauge |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201057020Y (en) * | 2006-09-29 | 2008-05-07 | 陈菲 | Pressure-controlled shunting system |
| CN102102506A (en) * | 2010-12-22 | 2011-06-22 | 中国石油天然气集团公司 | Fire flooding oil extraction layered steam injection method and separate injection tubular column adopted by same |
| CN203685147U (en) * | 2014-01-11 | 2014-07-02 | 中国石油化工股份有限公司 | Offshore separate-layer sand control, separate-layer oil production and separate-layer testing integrated pipe column |
| CN203742549U (en) * | 2014-02-07 | 2014-07-30 | 中国石化股份胜利油田分公司桩西采油厂 | Washable overflow control device for water injection well tail tube |
| US20150075780A1 (en) * | 2013-08-12 | 2015-03-19 | Halliburton Energy Services, Inc. | Multi-zone completion systems and methods |
-
2015
- 2015-09-01 CN CN201510549980.5A patent/CN105134143B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201057020Y (en) * | 2006-09-29 | 2008-05-07 | 陈菲 | Pressure-controlled shunting system |
| CN102102506A (en) * | 2010-12-22 | 2011-06-22 | 中国石油天然气集团公司 | Fire flooding oil extraction layered steam injection method and separate injection tubular column adopted by same |
| US20150075780A1 (en) * | 2013-08-12 | 2015-03-19 | Halliburton Energy Services, Inc. | Multi-zone completion systems and methods |
| CN203685147U (en) * | 2014-01-11 | 2014-07-02 | 中国石油化工股份有限公司 | Offshore separate-layer sand control, separate-layer oil production and separate-layer testing integrated pipe column |
| CN203742549U (en) * | 2014-02-07 | 2014-07-30 | 中国石化股份胜利油田分公司桩西采油厂 | Washable overflow control device for water injection well tail tube |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107252A (en) * | 2019-06-03 | 2019-08-09 | 武汉亿达联创石油科技有限公司 | Down-hole switch and can real-time monitoring down-hole string system |
| CN112832711A (en) * | 2020-12-10 | 2021-05-25 | 中国石油天然气股份有限公司 | Flow control gauge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105134143B (en) | 2017-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104806194A (en) | Environment-friendly well-washable step-by-step deblocking water injection packer | |
| CN105201454A (en) | Blowout-preventive multifunctional tail pipe for water injection well | |
| CN104343400A (en) | Snubbing controllable workover operation equipment and operation method thereof | |
| CN102777148A (en) | Double-function releasing bridge plug for horizontal well | |
| CN104373075A (en) | Fracturing packer | |
| CN105134143A (en) | Oil jacket dividing and balancing blowout prevention tubular column for injection well work | |
| CN103485744A (en) | Separated zone water injection centralizing type packer of directional well | |
| CN104295250B (en) | Screen annulus sand-washing tubular column | |
| CN203420663U (en) | Water injection well packer capable of being unsealed level by level | |
| CN202914018U (en) | Pressure test anti-spraying multifunctional plug | |
| CN201090177Y (en) | Multifunctional check valve | |
| CN109441399A (en) | One kind can sand washing bridge plug | |
| CN211549641U (en) | Bidirectional seat seal backflow-preventing packer | |
| CN205400675U (en) | Hydraulic pressure switching tool in pit | |
| CN204252930U (en) | Fracturing packer | |
| CN110965958A (en) | Bidirectional seat seal backflow-preventing packer | |
| CN205013256U (en) | Can salvage short pump barrel oil -well pump of long column stopper | |
| CN207892584U (en) | A kind of solvable drawing packer | |
| CN202810773U (en) | Balanced stage-by-stage unpacking washable well packer | |
| CN105089544A (en) | Pressure-bearing sleeve protection packer | |
| CN202745798U (en) | Layered water injection centering packer of directional well | |
| CN201513330U (en) | Blowout prevention and sand prevention oil-well pump with oil drainage function | |
| CN101392636A (en) | Sand prevention water injection packer | |
| CN204060611U (en) | A kind of open hole well squeezes stifled compression long packing element type hydraulic packer | |
| CN104653144A (en) | Compression packer for washable wells with large pressure difference for oil wells |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |