CN203847076U - One-step multilayer circulation filling sand prevention device with strings - Google Patents
One-step multilayer circulation filling sand prevention device with strings Download PDFInfo
- Publication number
- CN203847076U CN203847076U CN201420085442.6U CN201420085442U CN203847076U CN 203847076 U CN203847076 U CN 203847076U CN 201420085442 U CN201420085442 U CN 201420085442U CN 203847076 U CN203847076 U CN 203847076U
- Authority
- CN
- China
- Prior art keywords
- filling
- string
- pipe
- multilayer circulation
- butt
- 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 - Fee Related
Links
Landscapes
- Basic Packing Technique (AREA)
Abstract
The utility model provides a one-step multilayer circulation filling sand prevention device with strings. The one-step multilayer circulation filling sand prevention device comprises an outer string and a service string. The service string is inserted into the outer string and comprises a butt-joint string and a filling service string, the butt-joint string comprises a flushing pipe I, a butt-joint appliance and a fluid isolation pipe I, the butt-joint appliance is fixedly connected with the lower end of the flushing pipe I, the fluid isolation pipe I encircles the outer side of the flushing pipe I and the outer side of the butt-joint appliance and is separated from the flushing pipe I and the butt-joint appliance by an annular space, inverse well flushing can be carried out via an annular space channel, sand-carrying fluid can be upwardly returned via the annular space channel, the fluid isolation pipe I can be assuredly isolated from other oil layers, and pollution of the oil layers due to the fact that well fluid flows into strata during inverse well flushing can be prevented; the filling service string comprises a two-way body, an elastic mechanism, a lower sealing rod, a flushing pipe II and a lower-layer plugging sealing mechanism which are sequentially connected with one another from top to bottom, the two-way body is connected with the butt-joint appliance, and water holes are formed in the flushing pipe II. The one-step multilayer circulation filling sand prevention device has the advantages that a multi-section filling effect can be realized by the aid of the strings at one step, accordingly, construction programs can be simplified, time and the cost can be saved, and inverse well flushing can be carried out without shifting the strings.
Description
Technical field
The utility model relates to a kind of oil exploitation well sand preventing tool, especially a kind of one-trip string multilayer circulation filling anti-sand device.
Background technology
In oil field, oil well is generally divided into straight well, inclined shaft and horizontal well.Straight well is that designed path is a well that vertical is straight, through hole angle, approaches 0; Inclined shaft is for connecting the pit shaft that has certain angle of inclination of ground and underground passage; Horizontal well is that hole angle reaches or approaches 90 °, the well that well depth creeps into along horizontal direction.
At present, oil well mostly is long well section, multiple zone and horizontal well, in stowing operation, need repeatedly running string, the sand control cycle is long, expense is high, during full well section filling anti-sand, due to stratum each several part different in kind, filling effect is poor, the technique that the present invention adopts is divided into some layers by oil reservoir according to different qualities, carry out slicing and filling sand control, improve sand controlling result, one-trip string is lowered to, can realize multilayer packing job, save the activity duration, can first add sand extruding, after pressure diffusion, carry out flow pack, fixed tubular column can carry out anti-flushing well, simply, easy to operate, include every liquid pipe, during any one deck of filling, guarantee the isolation with other layer, while preventing anti-flushing well, well liquid enters stratum, cause the pollution of oil reservoir, the existing weak point of prior art that Here it is.
Summary of the invention
The technical problems to be solved in the utility model, be exactly for the existing deficiency of prior art, and a kind of one-trip string multilayer circulation filling anti-sand device is provided, this device adopts one-trip string can realize multilayer filling, simplified construction sequence, and oil reservoir has been polluted can avoid anti-flushing well time.
This programme is achieved by the following technical measures: this one-trip string multilayer circulation filling anti-sand device comprises outer tubing string and inserts its inner service tube-column, described service tube-column comprises docking tubing string and filling service tube-column, described docking tubing string comprises washing pipe I, docking adapter and every liquid pipe I, described docking adapter is fixedly connected with washing pipe I lower end, described every liquid pipe I be looped around washing pipe I and docking adapter outside and with both annular space settings; Described filling service tube-column comprises bilateral body, elastic mechanism, lower seal bar, the washing pipe ⅡHe shutoff lower floor sealing mechanism from up to down connecting in turn, and bilateral body is connected with docking adapter, in washing pipe II, is provided with hydrophthalmia.
Above-mentioned elastic mechanism comprises the connecting rod of resilient sleeve and support elastic cover, and the two ends of connecting rod are threaded with bilateral body and lower seal bar respectively, by connecting rod, bilateral body are connected with lower seal bar.
On above-mentioned bilateral body, be provided with double wall chamber and interior pack hole, double wall chamber and interior pack hole are separate and do not communicate, to form filling anti-sand and instead to clean two independently passages, the lower end of described bilateral body is provided with ball-and-seat I, and the lower end of lower seal bar is provided with ball-and-seat II, ball-and-seat I can only upwards flow liquid, can not flow downward, ball-and-seat II can only upwards be returned out liquid, can not flow downward, sand grains in pipe is washed out to well head, until well head loses sand grains.
On the lateral surface of above-mentioned resilient sleeve, be provided with step, when bilateral body moves back and forth in tubing string outside, by the groove fit on this step and switching sliding sleeve, overcome the active force of spring, drive switching sliding sleeve to move, interior pack hole and outer pack hole are aligned, carry out filling anti-sand operation, after step and groove disengaging, under acting force of the spring, switching sliding sleeve resets, interior pack hole and outer pack hole are staggered, stop filling anti-sand.
In above-mentioned outer tubing string, be provided with packer, described packer is divided into a plurality of filling sections by outer tube, the lower end of the filling section of below is fixedly connected with plug, in each filling section, be provided with packer, filling sliding sleeve, screen casing and sealing drum, described packer and filling sliding sleeve are arranged between upper seal bore and lower seal cylinder.
Switching sliding sleeve and spring that above-mentioned filling sliding sleeve comprises filling cylinder and is arranged on filling cylinder inside, on described filling cylinder, be provided with outer pack hole, the medial surface of switching sliding sleeve is provided with the groove mating with described step, to facilitate step to drive switching sliding sleeve to move by groove.Switching sliding sleeve can be closed under the effect of spring, and meanwhile, step drives switching sliding sleeve to move by groove, and closing of switching sliding sleeve played to double insurance effect.If once close unsuccessfully, put on can be repeatedly and put step, step drives switching sliding sleeve to close by groove.
In above-mentioned shutoff lower floor sealing mechanism, be provided with every liquid pipe II, every liquid pipe II, can guarantee and the isolation of other oil reservoir, while preventing anti-flushing well, well liquid enters stratum, causes the pollution of oil reservoir.
Above-mentioned outer tubing string with every liquid pipe I annular space, arrange, can complete anti-flushing well operation, and during any one deck oil reservoir of filling, every liquid pipe I, can guarantee and the isolation of other oil reservoir, while preventing anti-flushing well, well liquid enters stratum, causes the pollution of oil reservoir.
The beneficial effect of this programme can be learnt according to the narration to such scheme, in this one-trip string multilayer circulation filling anti-sand device, service tube-column comprises docking tubing string and filling service tube-column, described docking tubing string comprises washing pipe I, docking adapter and every liquid pipe I, described docking adapter is fixedly connected with washing pipe I lower end, described every liquid pipe I be looped around washing pipe I and docking adapter outside and with both annular space settings, by this annulus access, carry out anti-flushing well and the liquid of the foldback load fluid that makes progress, when any one deck oil reservoir of filling, every liquid pipe I, can guarantee the isolation with other oil reservoir, while preventing anti-flushing well, well liquid enters stratum, cause the pollution of oil reservoir, described filling service tube-column comprises bilateral body, elastic mechanism, lower seal bar, the washing pipe ⅡHe shutoff lower floor sealing mechanism from up to down connecting in turn, bilateral body is connected with docking adapter, in washing pipe II, be provided with hydrophthalmia, adopt after this structure, only adopt one-trip string can realize multistage filling, simplify construction sequence, save time and cost, and fixed tubular column can carry out anti-flushing well, simple in structure, easy construction.As can be seen here, the utility model compared with prior art, has substantive distinguishing features and progress, and the beneficial effect of its enforcement is also apparent.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model specific embodiment.
Fig. 2 is the structural representation of filling service tube-column.
Fig. 3 is the structural representation of filling sliding sleeve.
Fig. 4 is the structural representation of bilateral body.
In figure, 1-is every liquid pipe II, 2-washing pipe II, 3-ball-and-seat II, 4-lower seal bar, 5-resilient sleeve, 6-bilateral body, 7-docking adapter, 8-washing pipe I, 9-is every liquid pipe I, 10-plug, 11-screen casing, 12-sealing drum, 13-filling sliding sleeve, 14-zone isolation packer, 15-sealing drum, 16-screen casing, 17-filling sliding sleeve, 18-top packer, pack hole in 19-, the outer pack hole of 20-, 21-step, 22-bilateral body, 23-ball-and-seat I, 24-double wall chamber, 25-upper seal bore, 26-switching sliding sleeve, 27-groove, 28-filling cylinder, 29-spring, 30-lower seal cylinder, 31-wiper block, 32-connecting rod.
The specific embodiment
For clearly demonstrating the technical characterstic of this programme, below by the specific embodiment, and in conjunction with its accompanying drawing, this programme is set forth.
A kind of one-trip string multilayer circulation filling anti-sand device, as shown in the figure, it comprises outer tubing string and inserts its inner service tube-column, described service tube-column comprises docking tubing string and filling service tube-column, described docking tubing string comprises washing pipe I 8, docking adapter 7 and every liquid pipe I 9, described docking adapter 7 is fixedly connected with washing pipe I 8 lower ends, described every liquid pipe I 9 be looped around washing pipe I 8 and docking adapter 7 outside and with both annular space settings, outer tubing string with every the 9 annular space settings of liquid pipe I.
Wherein, filling service tube-column comprises bilateral body 6, elastic mechanism, lower seal bar 4, washing pipe II 2 and the shutoff lower floor sealing mechanism from up to down connecting in turn, bilateral body 6 is connected with docking adapter 7, in washing pipe II 2, is provided with hydrophthalmia, in shutoff lower floor sealing mechanism, is provided with every liquid pipe II 1.This elastic mechanism comprises the connecting rod 32 of resilient sleeve 5 and support elastic cover 5, and the two ends of connecting rod 32 are threaded with bilateral body 6 and lower seal bar 4 respectively, by connecting rod 32, bilateral body 6 and lower seal bar 4 are linked into an integrated entity.
On the lateral surface of resilient sleeve 5, be provided with step 21, on described bilateral body 6, be provided with double wall chamber 24 and interior pack hole 19, double wall chamber 24 and interior pack hole 19 are separate and do not communicate, and the lower end of described bilateral body 6 is provided with ball-and-seat I 23, and the lower end of lower seal bar 4 is provided with ball-and-seat II 3.
In outer tubing string, be provided with zone isolation packer 14, described packer 14 is divided into a plurality of filling sections by outer tube, the lower end of the filling section of below is fixedly connected with plug 10, in each filling section, be provided with packer, filling sliding sleeve 13, screen casing and sealing drum, described packer and filling sliding sleeve 13 are arranged between upper seal bore 25 and lower seal cylinder 30, specifically, the packer on the superiors' oil reservoir top is top packer 18, packer between adjacent two oil reservoirs is zone isolation packer 14, and the two ends up and down of zone isolation packer 14 are provided with sealing drum.
Switching sliding sleeve 26 and spring 29 that filling sliding sleeve 13 comprises filling cylinder 28 and is arranged on filling cylinder 28 inside, be provided with outer pack hole 20 on described filling cylinder 28, the medial surface of switching sliding sleeve 26 is provided with the groove 27 mating with described step 21.
Under filling during oil reservoir, zone isolation packer 14 setting good after, transfer bilateral body 6 in service tube-column to filling position, now, by resilient sleeve 5, the switching sliding sleeve on filling sliding sleeve 13 26 is opened, interior pack hole 19 and outer pack hole 20 are corresponding, in oil pipe, suppress, load fluid is through washing pipe I 8, docking adapter 7, the interior pack hole 19 of bilateral body 6 and the outer pack hole 20 on filling sliding sleeve 13 are to filling in oil reservoir, load fluid is flowed through to screen casing 11, the grains of sand by screen casing 11 gears outside, the hydrophthalmia that the liquid of load fluid is flowed through in washing pipe II 2 by screen casing 11, through the double wall chamber 24 of bilateral body 6, flow through to the annulus access between liquid pipe I 9 and washing pipe I 8 and flow to well head.When load fluid is constantly when oil reservoir fills sand downwards in oil pipe, pressure meter reaches 14-16MPa, show lower oil reservoir filling complete.
Anti-flushing well: after lower oil reservoir filling completes, carry out anti-flushing well, from the annulus access between liquid pipe I 9 and washing pipe I 8, suppress water filling, liquid is entered in the double wall chamber 24 of bilateral body 6 by annulus access, because there are ball-and-seat II 3(liquid ball-and-seat II 3 places that flow through bilateral body 6 lower ends, can only on return, can not flow into oil reservoir downwards through ball-and-seat II 3), so liquid can only upwards return out by bilateral body 6, process docking adapter 7 and washing pipe I 8 internal channels, sand grains in pipe is washed out to well head, until well head loses sand.
After lower oil reservoir filling is complete, above carry the bilateral body 6 of service tube-column, filling anti-sand operation and the anti-flushing well operation of oil reservoir in the middle of carrying out, filling anti-sand operation and anti-flushing well operation process are the same.
During filling the superiors oil reservoirs: after middle oil reservoir filling is complete, on carry the bilateral body 6 of service tube-column, by resilient sleeve 5, the switching sliding sleeve on filling sliding sleeve 13 26 is opened, make the outer pack hole 20 on filling sliding sleeve 13 corresponding with the interior pack hole 19 of bilateral body 6, in oil pipe, suppress, load fluid is through washing pipe I 8, docking adapter 7, the upwards interior filling of oil reservoir of the interior pack hole 19 of bilateral body 6 and the outer pack hole on filling sliding sleeve 13 20, load fluid is flowed through to screen casing 16, the grains of sand by screen casing 16 gears outside, the liquid of load fluid is by the flow through hydrophthalmia of washing pipe II 2 of screen casing 16, through bilateral body 6, by the double wall chamber 24 of bilateral body 6 through annulus access and outer tube between liquid pipe I 9 and washing pipe I 8 and flow to well head every liquid pipe I 9 annulus access.When load fluid constantly in oil pipe to oil reservoir while filling sand, pressure meter reaches 14-16MPa, show lower oil reservoir filling complete.
Anti-flushing well: from the annulus access every liquid pipe I 9 and washing pipe I 8 and outer tube and in the annulus access of liquid pipe I 9 anti-circulation water filling suppress, liquid is entered in the double wall chamber 24 of bilateral body 6 by two annulus access, because there is ball-and-seat II 3 bilateral body 6 lower ends, liquid ball-and-seat II 3 places that flow through, can only on return, can not flow into oil reservoir downwards through ball-and-seat II 3, so liquid can only upwards return out by service tube-column passage, sand grains in pipe is washed out to well head, until well head loses sand.
Advantage of the present utility model:
1. one-trip string is realized multistage filling, only need extend the length of outer tubing string during multiple zone filling, simplifies construction sequence, saves time and cost;
2. fixed tubular column can carry out anti-flushing well, simple in structure, easy construction;
3. improve sand controlling result, extend the sand control cycle, save the activity duration;
4. include every liquid pipe, during any one deck of filling, guarantee and the isolation of other layer, while preventing anti-flushing well, well liquid enters stratum, causes the pollution of oil reservoir.
In the utility model, without the technical characterictic of describing, can pass through existing techniques in realizing, not repeat them here.The foregoing is only preferred embodiment of the present utility model; the utility model is not limited in the above-mentioned specific embodiment; the variation that those of ordinary skills make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (8)
1. an one-trip string multilayer circulation filling anti-sand device, it comprises outer tubing string and inserts its inner service tube-column, it is characterized in that: described service tube-column comprises docking tubing string and filling service tube-column, described docking tubing string comprises washing pipe I, docking adapter and every liquid pipe I, described docking adapter is fixedly connected with washing pipe I lower end, described every liquid pipe I be looped around washing pipe I and docking adapter outside and with both annular space settings; Described filling service tube-column comprises bilateral body, elastic mechanism, lower seal bar, the washing pipe ⅡHe shutoff lower floor sealing mechanism from up to down connecting in turn, and bilateral body is connected with docking adapter, in washing pipe II, is provided with hydrophthalmia.
2. one-trip string multilayer circulation filling anti-sand device according to claim 1, is characterized in that: described elastic mechanism comprises the connecting rod of resilient sleeve and support elastic cover, and the two ends of connecting rod are threaded with bilateral body and lower seal bar respectively.
3. one-trip string multilayer circulation filling anti-sand device according to claim 1, it is characterized in that: on described bilateral body, be provided with double wall chamber and interior pack hole, double wall chamber and interior pack hole are separate and do not communicate, the lower end of described bilateral body is provided with ball-and-seat I, and the lower end of lower seal bar is provided with ball-and-seat II.
4. one-trip string multilayer circulation filling anti-sand device according to claim 2, is characterized in that: on the lateral surface of described resilient sleeve, be provided with step.
5. according to the one-trip string multilayer circulation filling anti-sand device described in claim 1,2 or 3, it is characterized in that: in described outer tubing string, be provided with packer, described packer is divided into a plurality of filling sections by outer tube, the lower end of the filling section of below is fixedly connected with plug, in each filling section, be provided with packer, filling sliding sleeve, screen casing and sealing drum, described packer and filling sliding sleeve are arranged between upper seal bore and lower seal cylinder.
6. one-trip string multilayer circulation filling anti-sand device according to claim 5, it is characterized in that: switching sliding sleeve and spring that described filling sliding sleeve comprises filling cylinder and is arranged on filling cylinder inside, on described filling cylinder, be provided with outer pack hole, the medial surface of switching sliding sleeve is provided with the groove mating with described step.
7. according to the one-trip string multilayer circulation filling anti-sand device described in claim 1,2 or 3, it is characterized in that: in described shutoff lower floor sealing mechanism, be provided with every liquid pipe II.
8. one-trip string multilayer circulation filling anti-sand device according to claim 5, is characterized in that: described outer tubing string with every liquid pipe I annular space, arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420085442.6U CN203847076U (en) | 2014-02-27 | 2014-02-27 | One-step multilayer circulation filling sand prevention device with strings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420085442.6U CN203847076U (en) | 2014-02-27 | 2014-02-27 | One-step multilayer circulation filling sand prevention device with strings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203847076U true CN203847076U (en) | 2014-09-24 |
Family
ID=51560110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420085442.6U Expired - Fee Related CN203847076U (en) | 2014-02-27 | 2014-02-27 | One-step multilayer circulation filling sand prevention device with strings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203847076U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879099A (en) * | 2015-04-28 | 2015-09-02 | 中国海洋石油总公司 | Gravel packing pipe column and gravel packing method |
| CN104879100A (en) * | 2015-05-25 | 2015-09-02 | 山东博赛特石油技术有限公司 | Multilayer-section filling service tool |
| CN106978992A (en) * | 2016-01-19 | 2017-07-25 | 中国石油化工股份有限公司 | A kind of tubing string and method that can be used for being layered chemical sand control |
| CN107524427A (en) * | 2015-05-14 | 2017-12-29 | 胜利油田康贝石油工程装备有限公司 | A kind of oilfield horizontal well pipe construction method |
| CN111042776A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工股份有限公司 | Anti-channeling layered filling sand prevention pipe column and method |
| CN111927379A (en) * | 2020-10-14 | 2020-11-13 | 东营市瑞丰石油技术发展有限责任公司 | Bypass packer |
| CN112814629A (en) * | 2019-11-18 | 2021-05-18 | 东营市蕴东石油科技有限公司 | One-time washing and two-way filling sand prevention pipe column |
| WO2022040658A1 (en) * | 2020-08-17 | 2022-02-24 | Baker Hughes Oilfield Operations Llc | One-trip screen installation and cleaning system |
-
2014
- 2014-02-27 CN CN201420085442.6U patent/CN203847076U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879099A (en) * | 2015-04-28 | 2015-09-02 | 中国海洋石油总公司 | Gravel packing pipe column and gravel packing method |
| CN104879099B (en) * | 2015-04-28 | 2017-11-10 | 中国海洋石油总公司 | Gravel fills tubing string and gravel pack methods |
| CN107524427B (en) * | 2015-05-14 | 2019-05-10 | 胜利油田康贝石油工程装备有限公司 | A kind of oilfield horizontal well pipe construction method |
| CN107524427A (en) * | 2015-05-14 | 2017-12-29 | 胜利油田康贝石油工程装备有限公司 | A kind of oilfield horizontal well pipe construction method |
| CN104879100A (en) * | 2015-05-25 | 2015-09-02 | 山东博赛特石油技术有限公司 | Multilayer-section filling service tool |
| CN104879100B (en) * | 2015-05-25 | 2017-06-16 | 山东博赛特石油技术有限公司 | A kind of multi-section multi-layer fills service aid |
| CN106978992A (en) * | 2016-01-19 | 2017-07-25 | 中国石油化工股份有限公司 | A kind of tubing string and method that can be used for being layered chemical sand control |
| CN111042776A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工股份有限公司 | Anti-channeling layered filling sand prevention pipe column and method |
| CN111042776B (en) * | 2018-10-11 | 2023-08-04 | 中国石油化工股份有限公司 | Anti-crossflow layered filling sand prevention pipe column and method |
| CN112814629A (en) * | 2019-11-18 | 2021-05-18 | 东营市蕴东石油科技有限公司 | One-time washing and two-way filling sand prevention pipe column |
| WO2022040658A1 (en) * | 2020-08-17 | 2022-02-24 | Baker Hughes Oilfield Operations Llc | One-trip screen installation and cleaning system |
| GB2613318A (en) * | 2020-08-17 | 2023-05-31 | Baker Hughes Oilfield Operations Llc | One-trip screen installation and cleaning system |
| CN111927379A (en) * | 2020-10-14 | 2020-11-13 | 东营市瑞丰石油技术发展有限责任公司 | Bypass packer |
| CN111927379B (en) * | 2020-10-14 | 2020-12-15 | 东营市瑞丰石油技术发展有限责任公司 | Bypass packer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203847076U (en) | One-step multilayer circulation filling sand prevention device with strings | |
| US6732804B2 (en) | Dynamic mudcap drilling and well control system | |
| CN202544824U (en) | Concentric double-pipe hierarchical injection pipe column | |
| CN104533356B (en) | The method and oil production by layer method of a kind of two-layer automatic control oil production by layer | |
| CN104695892A (en) | Independent hydraulic control compression packer | |
| CN104481484B (en) | Horizontal well in segments Intermittent cyclic steam stimulation note adopts integrated pipe column | |
| RU2334867C1 (en) | Method of simultaneous-separate operation of several payout beds and installation of well for implementation of this method | |
| CN201372779Y (en) | Oil casing communicating vessel | |
| NO332086B1 (en) | Wellhead installation and method of injecting fluid and cuttings into the annulus of a well | |
| CN103061707B (en) | Cycling switch valve under well | |
| CN103541700B (en) | Reverse sealed eccentric injection mandrel | |
| CN103161432A (en) | Lifting type layered oil production tubular column | |
| CN202731847U (en) | Circulatory produced sliding sleeve | |
| CN204386576U (en) | Horizontal well in segments Intermittent cyclic steam stimulation note adopts integrated pipe column | |
| CN204212753U (en) | Upper strata layered polymer injection lower floor commingled water injection process pipe string | |
| RU76964U1 (en) | EQUIPMENT FOR SIMULTANEOUS-SEPARATE OPERATION ON A SINGLE-LIFT COLUMN OF PIPES OF TWO LAYERS IN ONE WELL | |
| CN206158709U (en) | Support formula water injection string | |
| CN205400675U (en) | Hydraulic pressure switching tool in pit | |
| CN202645512U (en) | Lift-type separate layer production string | |
| RU2380526C1 (en) | Multi-reservoir well sumultanious-separate production method | |
| CN201460799U (en) | Concentric integrated water-plugging finding pipe column | |
| CN105545264A (en) | Carbon dioxide wheel injection oil displacement single-tube double-layer injection process tubular column | |
| CN104060959A (en) | Conventional well-flushing valve, pumping well and well flushing method for pumping well | |
| RU126362U1 (en) | PACKER FOR SELECTIVE OVERLAPPING OF THE INNER CAVITY OF A PIPE OR CASE COLUMN | |
| CN201202457Y (en) | Double-tube water injecting system of water injection well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DONGYING RUIFENG PETROLEUM TECHNOLOGY DEVELOPMENT Free format text: FORMER OWNER: KONG LISHENG Effective date: 20150608 Owner name: SHANDONG RUIFENG PETROLEUM TECHNOLOGY CO., LTD. QI Effective date: 20150608 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 257000 DONGYING, SHANDONG PROVINCE TO: 257067 DONGYING, SHANDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150608 Address after: 257067 Shandong Province, Dongying city Dongying District five bridge Taishan Road East Patentee after: Dongying Ruifeng Petroleum Development Co., Ltd. Patentee after: Shandong Ruifeng Petroleum Technology Co., Ltd. Patentee after: Qingdao Ruixin Petroleum Equipment Manufacturing Co., Ltd. Address before: 257000 Shandong province Dongying City West Road No. 518 Patentee before: Kong Lisheng |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20170227 |