CN202611644U - Water injection well completion string - Google Patents
Water injection well completion string Download PDFInfo
- Publication number
- CN202611644U CN202611644U CN 201220154748 CN201220154748U CN202611644U CN 202611644 U CN202611644 U CN 202611644U CN 201220154748 CN201220154748 CN 201220154748 CN 201220154748 U CN201220154748 U CN 201220154748U CN 202611644 U CN202611644 U CN 202611644U
- Authority
- CN
- China
- Prior art keywords
- water injection
- string
- water
- safety valve
- jet
- 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
Images
Abstract
The utility model relates to a water injection well completion string. The water injection well completion string is characterized by comprising a downhole bush, wherein a water injection string is arranged in the downhole bush through a plurality of packers which are arranged at intervals, the upper portion of the water injection string is provided with a water injection safety valve, a sand control screen is arranged between the lower portion of the water injection string and a perforated interval of the downhole bush, one side of the water injection string is provided with a jet flow string, the upper portion of the jet flow string is provided with a water jet safety valve, a plurality of jet flow nozzles are arranged on the jet flow string located in the perforated interval of the downhole bush in a spaced mode, the direction of the jet flow nozzles faces the stratum, the water injection safety valve and the water jet safety valve are respectively connected with a hydraulic control system of a well head through hydraulic control lines of the water injection safety valve and the water jet safety valve. The water injection well completion string can be widely used in downhole sewage disposal operation of water injection wells at the sea.
Description
Technical field
The utility model relates to water injection well tubing string in a kind of petroleum production engineering, particularly can remove the water injection well completion tubular column that pollute the near wellbore zone about a kind of.
Background technology
At present water injection well usually occurs because of the water quality of injecting water not up to standardly in injection process, and causes sand control screen and near wellbore zone phenomenon of blocking, therefore causes the water injection well injection pressure to increase, and injection rate descends.For the obstruction in the sand control screen; Can adopt means such as flushing, pickling to separate depollution at present; But for the pollution in the outer stratum, sand control screen outside especially perforated interval; Can only remove through acidizing treatment at present, but the acidizing treatment expense is higher, and can causes the permanent injury on stratum.Therefore, need a kind of stratum of neither injuring of design, can also guarantee the completion tubular column of water injection well safety injection simultaneously.
Summary of the invention
To the problems referred to above, the purpose of the utility model provides a kind of simple in structure, safe and reliable, can effectively remove the injection well completion tubular column that pollute the near wellbore zone.
For realizing above-mentioned purpose; The utility model is taked following technical scheme: a kind of water injection well completion tubular column; It is characterized in that: it comprises a down-hole casing; Be provided with a water injection string through the some packers that are provided with at interval in the said down-hole casing, the top of said water injection string is provided with a water filling safety valve, is provided with a sand control screen between the perforated interval of said water injection string bottom and said down-hole casing; One side of said water injection string is provided with a jet tubing string; Said jet tubing string top is provided with a water spray safety valve; Be positioned on the said jet tubing string of said down-hole casing perforated interval and be arranged at intervals with some jet nozzles, the direction of said jet nozzle is towards the stratum; Said water filling safety valve is connected the hydraulic control system of well head respectively with the water spray safety valve through hydraulic control line separately.
Be filled with gravel between said water injection string bottom and the sand control screen.
The utility model is owing to take above technical scheme; It has the following advantages: 1, the utility model is owing to together go into well with a jet tubing string and conventional water injection string; And be provided with some jet nozzles at interval being positioned on the jet tubing string of down-hole casing perforated interval towards the stratum; In case therefore the perforated interval of down-hole casing stops up, can offer the passage that makes new advances at the perforated interval of down-hole casing through the high-pressure water jet of jet tubing string jet nozzle injection; Remove the problem of near wellbore zone contamination and plugging apace, guarantee the injection of water injection well safety.2, the utility model is simple in structure; Safe and reliable; Need not trip out water injection string in the operation process; Not only can effectively solve the problem that the injectability that causes because of contamination and plugging in water injection well and near wellbore zone reduces, and can not cause possible permanent damage, can also reduce the input cost of removing contamination greatly the stratum.The utility model can be widely used in the clean-up operation of marine water injection well down-hole.
Description of drawings
Fig. 1 is the utility model structural representation
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is carried out detailed description.
As shown in Figure 1; The utility model comprises a down-hole casing 1; In down-hole casing 1, a water injection string 3 is set through the some packers 2 that are provided with at interval; The top of water injection string 3 is provided with a water filling safety valve 4, is provided with a sand control screen 6 between the perforated interval 5 of water injection string 3 bottoms and down-hole casing 1.Side at water injection string 3 is provided with a jet tubing string 7, and jet tubing string 7 tops are provided with a water spray safety valve 8, is positioned on the jet tubing string 7 of down-hole casing 1 perforated interval 5 to be arranged at intervals with some jet nozzles 9, and the direction of jet nozzle 9 is towards the stratum.Water filling safety valve 4 is connected the hydraulic control system of well head respectively with water spray safety valve 8 through hydraulic control line 10,11.
In the foregoing description, can between water injection string 3 bottoms and sand control screen 6, fill the gravel that is used for sand control.
When the utility model carries out normal water filling operation; Close through hydraulic control system control water spray safety valve 8, water filling safety valve 4 is opened, and water injection string 3 water fillings are normally carried out; Stop up the weep hole of perforated interval 5 gradually along with the impurity in the water quality; And make the stratum, near wellbore zone become narrow gradually even stop up, cause water injection pressure to increase and can't realize the normal water filling of water injection string 3 time, need carry out the Downhole jetting clean-up operation.At this moment, close through hydraulic control system control water filling safety valve 4, water spray safety valve 8 is opened, and carries out the high-pressure injection operation, with the new waterflood path in perforated interval 5 injection formation one places of down-hole casing 1.In case when getting into the water filling operation again, the water from water injection string 3 sprays just can flow out from new waterflood path, and permeates to water injection well and near wellbore zone, thereby solved the problem of contamination and plugging effectively.
Above-mentioned each embodiment only is used to explain the utility model; Wherein the structure of each parts and connected mode etc. all can change to some extent; Every equivalents of on the basis of the utility model technical scheme, carrying out and improvement all should not got rid of outside the protection domain of the utility model.
Claims (2)
1. water injection well completion tubular column; It is characterized in that: it comprises a down-hole casing; Be provided with a water injection string through the some packers that are provided with at interval in the said down-hole casing; The top of said water injection string is provided with a water filling safety valve, is provided with a sand control screen between the perforated interval of said water injection string bottom and said down-hole casing; One side of said water injection string is provided with a jet tubing string; Said jet tubing string top is provided with a water spray safety valve; Be positioned on the said jet tubing string of said down-hole casing perforated interval and be arranged at intervals with some jet nozzles, the direction of said jet nozzle is towards the stratum; Said water filling safety valve is connected the hydraulic control system of well head respectively with the water spray safety valve through hydraulic control line separately.
2. a kind of water injection well completion tubular column as claimed in claim 1 is characterized in that: be filled with gravel between said water injection string bottom and the sand control screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220154748 CN202611644U (en) | 2012-04-12 | 2012-04-12 | Water injection well completion string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220154748 CN202611644U (en) | 2012-04-12 | 2012-04-12 | Water injection well completion string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202611644U true CN202611644U (en) | 2012-12-19 |
Family
ID=47345353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220154748 Expired - Fee Related CN202611644U (en) | 2012-04-12 | 2012-04-12 | Water injection well completion string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202611644U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779466A (en) * | 2020-06-29 | 2020-10-16 | 孙宇斐 | Method for solving problem of shaft blockage of failed prefabricated restrictor through hydraulic sand blasting perforation process |
| CN114198066A (en) * | 2021-12-16 | 2022-03-18 | 中国地质科学院勘探技术研究所 | Sea natural gas hydrate desanding exploitation device and desanding exploitation method thereof |
-
2012
- 2012-04-12 CN CN 201220154748 patent/CN202611644U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779466A (en) * | 2020-06-29 | 2020-10-16 | 孙宇斐 | Method for solving problem of shaft blockage of failed prefabricated restrictor through hydraulic sand blasting perforation process |
| CN111779466B (en) * | 2020-06-29 | 2022-04-19 | 孙宇斐 | Method for solving problem of shaft blockage of failed prefabricated restrictor through hydraulic sand blasting perforation process |
| CN114198066A (en) * | 2021-12-16 | 2022-03-18 | 中国地质科学院勘探技术研究所 | Sea natural gas hydrate desanding exploitation device and desanding exploitation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201090188Y (en) | Fixedly tubular pile delamination hydraulic jet perforating and compression fracture integration tubular pile | |
| CN112253070B (en) | Method for sectional seam making, coal washing and outburst elimination of thick coal seam top-bottom linkage horizontal well | |
| CN104632172A (en) | Immovable string hydraulic sandblasting fracture annulus pressure control method for gas field horizontal well | |
| CN104213895A (en) | Hydraulic sand jet perforation, fracture and sand filling integrated technological method | |
| CN103452531B (en) | Oil pipe under underbalance, no killing well gaslift, turn the method for taking out, examining pump and maintenance oil pipe | |
| CN208137872U (en) | A kind of jet stream de-plugging tubing string | |
| RU2652412C1 (en) | Method of acidizing bottomhole formation zone with carbonate reservoir | |
| CN202611644U (en) | Water injection well completion string | |
| CN103306645B (en) | Horizontal well the pressure of the drill splits completion tubular column and technique thereof | |
| CN104453806A (en) | Method for removing sandstone condensate gas reservoir water lock through nitrogen injection | |
| CN101122218A (en) | Drift sand well harnessing process | |
| CN202645526U (en) | Jet flow sand blasting cracking device | |
| CN209892171U (en) | Horizontal well section staggered displacement and imbibition displacement injection-production string | |
| CN103470221A (en) | Underbalance tubing, no-killing gas lifting, shaft pumping and pump detecting combined method | |
| CN204041042U (en) | A kind of coiled tubing drag fracturing tubing string | |
| CN103790529A (en) | Coalbed methane drainage extraction and backwashing device and method | |
| CN103821490A (en) | Special ejector with multilevel hydraulic ejecting and staged fracturing | |
| RU2296217C1 (en) | Well bottom zone treatment method | |
| RU2537430C1 (en) | Method of cleaning of near wellbore region of injection wells | |
| CN204827391U (en) | Heat -extraction system is returned to negative pressure for oil -water well | |
| RU2740505C1 (en) | Acid treatment method of open horizontal shaft of wells | |
| CN201090197Y (en) | Three-level four-segment injection-divided tubular pile capable of preventing water injection segment from inverse-spraying and channelling | |
| RU2007118892A (en) | METHOD FOR SIMULTANEOUSLY SEPARATED AND ALTERNATIVE OPERATION AND DEVELOPMENT OF MULTIPLE LAYERS ONE WELL | |
| CN202832462U (en) | Unblocking device capable of carrying out separate layer acid treatment and negative pressure acid discharge | |
| CN102278092A (en) | Biological enzyme blocking removal process for blocking of inorganic scaling contained in strata |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20210412 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |