CN1538034A - Well washing method of hierarchical water injection well and its underwell tubular column - Google Patents
Well washing method of hierarchical water injection well and its underwell tubular column Download PDFInfo
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- CN1538034A CN1538034A CNA200310105353XA CN200310105353A CN1538034A CN 1538034 A CN1538034 A CN 1538034A CN A200310105353X A CNA200310105353X A CN A200310105353XA CN 200310105353 A CN200310105353 A CN 200310105353A CN 1538034 A CN1538034 A CN 1538034A
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Abstract
A method for washing the hierarchical water-injection well features that the water-filling pipe column is lowered down in the hierachical pipe column to open the sealed channel, the water is then filled to make it flow through ring space of oil sleeve tube, sealing channel and the lower end pipe for returning upward, and the water-filling pipe column is lifted up to close said sealed channel. Its underground pipe column system is composed of the hierarchical pipe column consisting of packers and sand-preventing pipe and the water-filling pipe column consisting of water distributors and connecting pipes.
Description
Technical field
The present invention relates to the pumping and washing process and the down-hole string thereof of the oil production technology and the equipment, particularly separate water injection well of petroleum industry, be applicable to separate water injection well.
Technical background
For a long time, in the laminated distributor under well the injecting process of oil field,, remove obstruction by regular clean-out service owing to reasons such as water quality, fouling cause the obstruction of underground water-injection layer and tubing string.The washing well packer is installed on the used separate layer water injection string, see " petroleum production engineering handbook in August, 2000 front page, Beijing petroleum industry publishing house, the 55th page-68 pages " seperated layer water injection instrument and tubing string ", the formula that the dilates packer that initial stage adopts is shorter owing to its packing element life-span, now less use, a large amount of uses is the so-called washing well packer that has flushing valve and well-flushing passage now.When water filling, rely on the interior pressure of oil pipe greater than the outer pressure of oil pipe, flushing valve is pushed down and is in closed condition, and when well-flushing, the oil pipe external pressure is greater than the oil pipe internal pressure, and flushing valve is opened, and the well-flushing passage is open-minded.The well-flushing step is: the well-flushing current are descending from the tubing and casing annular space, and the bottom of continuing to go downwards to water injection string through the flushing valve of washing well packer and well-flushing passage is turned back up, inner up the returning out of Automatic water-filling tubing string.In use there is following problem in this washing well packer:
1, during water filling, to inject pressure reduction bigger when interlayer, when the pipe internal pressure is not enough to push down flushing valve, will inject the situation of ganging up between water layer, do not reach the seperated layer water injection purpose.
When 2, stopping annotating, because the pipe internal and external pressure balance, and there is pressure reduction in interlayer, flushing valve is opened, and causes the interlayer crossfire.If sand output well will cause sand production in oil, sand buries water injection string and causes notes not intake.
3, keep the safety in production for guaranteeing, the operation rules and regulations of offshore oilfield, oil-water well must be installed the annular space packer.The upper level packer of installing on water injection string is a washing well, when in case have an accident when stopping annotating, and internal and external pressure balance, flushing valve is open-minded, and packer has just lost safety effect.
Summary of the invention
The pumping and washing process and the down-hole string thereof that the purpose of this invention is to provide separate water injection well, overcome the deficiency of above-mentioned technology, solve the existing above problem of washing well packer well-washing valve, can anti-flushing well, reached seperated layer water injection again and the interlayer purpose of crossfire not when stopping annotating, when being used for the offshore oilfield water filling, also can satisfy safety requirements.
The present technique solution can reach above-mentioned purpose:
The pumping and washing process of separate water injection well is lowered to water injection string in the layering tubing string, and the well-flushing current are descending from the oil jacket annular space, and the seal channel of flowing through and opening is from interior up the returning out of water injection string bottom pipe.Pumping and washing process of the present invention is before and after well-flushing, by the handling water injection string, the seal channel between water injection string and the layering tubing string is opened or closed.
The down-hole string of separate water injection well is made up of the water injection string of outer field layering tubing string and internal layer, and the layering tubing string is made up of the anti-sandpipe or the ported sub that are installed in the packer more than the oil reservoir or between the oil reservoir, corresponding oil reservoir; Water injection string is formed by connecting with pipe by the injection well downhole flow regulator of corresponding each oil reservoir; Seal channel is made up of sealing device and sealed tube, sealing device and sealed tube mounted in pairs and be installed in respectively on the water injection string and the layering tubing string on.Be positioned at position connection lifter on the water injection string or more than tubing hanger at layered cylinders capital end with top.
The present invention compared with prior art has following significant advantage and effect: 1, the present invention has overcome the crossfire problem of the used washing well packer well-washing of original separate layer water injection string valve, has improved flood effectiveness, has reduced the chance of sand pipe laying post.2, for the water injection well of offshore oilfield, in a single day when stopping annotating when having an accident, the present invention can guarantee Seal Oil cover annular space, reaches the operation on the sea safety requirements.3, owing to These characteristics, improved the reliability of downhole production equipment, reduced the number of times of underground work, reduced cost of production, when being used for offshore oilfield, also can improve safety greatly, help environmental protection.
Description of drawings
Fig. 1 is structure of the present invention, scheme of installation.
The structural behavior and the water (flow) direction schematic diagram of down-hole string when Fig. 2 is an anti-flushing well of the present invention.
Among the figure: pipe 1; Sleeve pipe 2; Lifter 3; Sealing device 4; Sealed tube 5; Packer 6; Injection well downhole flow regulator 7; Anti-sandpipe or ported sub 8; Hydraulic line 9.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed description: referring to Fig. 2, the pumping and washing process of separate water injection well, water injection string is lowered in the layering tubing string, the well-flushing current are descending from the oil jacket annular space, the seal channel of flowing through and opening, from interior up the returning out of water injection string bottom pipe, pumping and washing process of the present invention is before and after well-flushing, by the handling water injection string, the seal channel between water injection string and the layering tubing string is opened or closed.
Use the down-hole string of the separate water injection well of above-mentioned pumping and washing process, referring to Fig. 1, water injection string by outer field layering tubing string and internal layer is formed, and the layering tubing string is made up of anti-sandpipe that is installed in the packer 6 more than the oil reservoir or between the oil reservoir, corresponding oil reservoir or ported sub 8; Water injection string is formed by connecting by the injection well downhole flow regulator 7 usefulness pipes 1 of corresponding each oil reservoir; Seal channel is made up of sealing device 4 and sealed tube 5, sealing device 4 and sealed tube 5 mounted in pairs and be installed in respectively on the water injection string and the layering tubing string on.Layered cylinders capital end with the upper part, connection lifter 3 on water injection string.Lifter 3 can also be installed in the above position of tubing hanger, comes the handling water injection string by lifter 3.Lifter 3 is hydraulic lifting mechanisms that hydraulic cylinder and piston are formed, with the hydraulic pump of a hydraulic line 9 connection lifters 3 and outer wellhead, as shown in Figure 1.Lifter 3 can also be the mechanical rotary lifting mechanism that spiral is paid composition, by control of ground power-equipment or artificial the rotation, reaches the purpose of handling water injection string.
Well-flushing comprises the following steps: one, acts on lifter 3 with external force, mentions or transfers the separate layer water injection string of lifter below 3, and sealing device 4 and sealed tube 5 are separated; Two, water injects descendingly from the oil jacket annular space, turns back up from the layered water injection pipe column bottom and goes out from the water injection string internal return; Three, well-flushing finishes, and external force acts on lifter 3 once more, transfers or mentions the separate layer water injection string of lifter below 3, makes sealing device 4 sealing sealed tubes 5.
The present invention is described further by the following examples:
Referring to Fig. 1, this figure is illustrated to be the situation of dividing two-layer water injection well flatly.Device of the present invention is installed in the sleeve pipe 2, and outside one deck is the layering tubing string, the center be water injection string, the two mutually combines and has formed down-hole string of the present invention.First packer 6 be installed in oil reservoir 1 with the upper part, its central tube inside is equipped with sealed tube 5, lower end be linked in sequence from top to bottom anti-sandpipe or ported sub 8, sealed tube 5, packer 6, anti-sandpipe or ported sub 8, sealed tube 5.Water injection string is equipped with lifter 3, sealing device 4, injection well downhole flow regulator 7, sealing device 4, injection well downhole flow regulator 7, sealing device 4 from top to bottom, and they interconnect with pipe 1, and wherein, each sealing device 4 matches with sealed tube 5, thereby reaches sealing function.Lifter 3 is hydraulic mechanisms that piston and fluid cylinder are formed.One end of hydraulic line 9 is connected with lifter 3, and the other end is connected with the hydraulic pump of outer wellhead.When water injection well is three layers of dispensing, install according to the structure that Fig. 1 indicates, increase sealing device 4, sealed tube 5, packer 6, injection well downhole flow regulator 7, anti-sandpipe or ported sub 8 each again, in like manner, every increase or reduce by a water filling layer, corresponding increase of above-mentioned instrument or minimizing.Sealing device 4 and sealed tube 5 mounted in pairs, and be installed in respectively on layering tubing string and the water injection string, their position can exchange.Sealing device 4 or sealed tube 5 can be installed in the above or following position of packer 6, and it is inner or be made of one with central tube also can be installed in the central tube of packer 6.Lifter 3 can also be installed in the above position of tubing hanger, and in this case, lifter 3 can also be the rotary lifting mechanism that spiral is paid composition.
Apparatus structure state and water (flow) direction schematic diagram when Fig. 2 is an anti-flushing well of the present invention.During well-flushing, act on lifter 3 with external force, just in hydraulic line 9, beat hydraulic pressure, if lifter 3 is that rotary lifting mechanism is with regard to swivel nut or screw rod if lifter 3 is hydraulic mechanisms, mention or transfer the separate layer water injection string of lifter below 3, sealing device 4 and sealed tube 5 are separated; Open the sleeve valve anti-flushing well, shown in arrow among Fig. 2, water injects descending from the oil jacket annular space, and the opened seal channel of flowing through is turned back up from the layered water injection pipe column bottom and gone out from the water injection string internal return; Well-flushing finishes, and external force acts on lifter 3 once more, transfers or mentions the separate layer water injection string of lifter below 3, closes seal channel, makes sealing device 4 sealing sealed tubes 5.
Claims (4)
1, the pumping and washing process of separate water injection well, water injection string is lowered in the layering tubing string, the well-flushing current are descending from the oil jacket annular space, the seal channel of flowing through and opening, from interior up the returning out of water injection string bottom pipe, it is characterized in that pumping and washing process of the present invention is before and after well-flushing, by the handling water injection string, opens or closes the seal channel between water injection string and the layering tubing string.
2, use the down-hole string of the separate water injection well of above-mentioned pumping and washing process, water injection string by outer field layering tubing string and internal layer is formed, and the layering tubing string is made up of anti-sandpipe that is installed in the packer (6) more than the oil reservoir or between the oil reservoir, corresponding oil reservoir or ported sub (8); Water injection string is formed by connecting with pipe (1) by the injection well downhole flow regulator (7) of corresponding each oil reservoir; Seal channel is made up of sealing device (4) and sealed tube (5), sealing device (4) and sealed tube (5) mounted in pairs and be installed in respectively on the water injection string and the layering tubing string on, it is characterized in that layered cylinders capital end with the upper part, be installed in position more than the tubing hanger in connection lifter (3) on the water injection string or with lifter (3).
3, the down-hole string of separate water injection well according to claim 2, the lifter (3) that it is characterized in that being installed on the water injection string is the hydraulic lifting mechanism that hydraulic cylinder and piston are formed, and connects the hydraulic pump of lifter (3) and outer wellhead with a hydraulic line (9).
4, the down-hole string of separate water injection well according to claim 2 when it is characterized in that described lifter (3) is installed in the above position of tubing hanger, can also be the mechanical rotary lifting mechanism that spiral is paid composition, by control of ground power-equipment or artificial the rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310105353XA CN1300441C (en) | 2003-10-23 | 2003-10-23 | Well washing method of hierarchical water injection well and its underwell tubular column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200310105353XA CN1300441C (en) | 2003-10-23 | 2003-10-23 | Well washing method of hierarchical water injection well and its underwell tubular column |
Publications (2)
| Publication Number | Publication Date |
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| CN1538034A true CN1538034A (en) | 2004-10-20 |
| CN1300441C CN1300441C (en) | 2007-02-14 |
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| CNB200310105353XA Expired - Fee Related CN1300441C (en) | 2003-10-23 | 2003-10-23 | Well washing method of hierarchical water injection well and its underwell tubular column |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463711A (en) * | 2007-12-18 | 2009-06-24 | 韦尔斯特里姆国际有限公司 | Heat dissipation |
| CN103244067A (en) * | 2013-05-15 | 2013-08-14 | 西南石油大学 | Downhole compound lifting tool for separated layer water injection pipe columns for highly deviated well and using method thereof |
| CN106437645A (en) * | 2016-10-28 | 2017-02-22 | 中国石油化工股份有限公司 | Automatic reversing water distributor of separate injection well and usage method |
| CN106939784A (en) * | 2017-01-13 | 2017-07-11 | 上海全泽能源科技有限公司 | The positioning acidizing device of stratified injection well |
| CN108131123A (en) * | 2016-11-30 | 2018-06-08 | 中国石油天然气股份有限公司 | Acid liquor injection device and method thereof |
| CN109184629A (en) * | 2018-08-30 | 2019-01-11 | 中国海洋石油集团有限公司 | A kind of selective sand control seperated layer water injection integral tubular column and its tripping in method |
| CN109681159A (en) * | 2017-10-17 | 2019-04-26 | 中国石油化工股份有限公司 | A kind of oil field multitube separate layer water injection string |
| CN111502609A (en) * | 2020-04-21 | 2020-08-07 | 中国海洋石油集团有限公司 | Water injection sand prevention pipe column capable of cleaning annular space of screen sleeve and well cleaning method |
| US10890059B2 (en) | 2018-02-07 | 2021-01-12 | Petrochina Company Limited | Layered water injection system and layered water injection method |
| CN112824641A (en) * | 2019-11-21 | 2021-05-21 | 中国石油天然气股份有限公司 | Integrated oil production process pipe column |
| CN113062699A (en) * | 2021-03-31 | 2021-07-02 | 代建伟 | Process method for carrying out layered injection well flushing by utilizing nitrogen injection |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112502C (en) * | 2000-08-25 | 2003-06-25 | 王松 | One-step filling technology for isolating high pressure and its tool |
| CN2532238Y (en) * | 2001-10-18 | 2003-01-22 | 吉林大学 | Hydraulic ground hole pipe lift |
| CN1389639A (en) * | 2002-07-12 | 2003-01-08 | 中国石化胜利油田有限公司采油工艺研究院 | Immobile well cylinder pile for stratum-shifting oil exploitation and its implementation |
-
2003
- 2003-10-23 CN CNB200310105353XA patent/CN1300441C/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101463711A (en) * | 2007-12-18 | 2009-06-24 | 韦尔斯特里姆国际有限公司 | Heat dissipation |
| CN101463711B (en) * | 2007-12-18 | 2014-03-05 | 韦尔斯特里姆国际有限公司 | Heat dissipation |
| CN103244067A (en) * | 2013-05-15 | 2013-08-14 | 西南石油大学 | Downhole compound lifting tool for separated layer water injection pipe columns for highly deviated well and using method thereof |
| CN103244067B (en) * | 2013-05-15 | 2015-10-21 | 西南石油大学 | High angle hole separate layer water injection string down-hole composite lifting instrument and using method thereof |
| CN106437645A (en) * | 2016-10-28 | 2017-02-22 | 中国石油化工股份有限公司 | Automatic reversing water distributor of separate injection well and usage method |
| CN106437645B (en) * | 2016-10-28 | 2018-12-18 | 中国石油化工股份有限公司 | Separate water injection well automatic reverse injection well downhole flow regulator and its application method |
| CN108131123A (en) * | 2016-11-30 | 2018-06-08 | 中国石油天然气股份有限公司 | Acid liquor injection device and method thereof |
| CN108131123B (en) * | 2016-11-30 | 2020-06-09 | 中国石油天然气股份有限公司 | Acid liquor injection device and method thereof |
| CN106939784A (en) * | 2017-01-13 | 2017-07-11 | 上海全泽能源科技有限公司 | The positioning acidizing device of stratified injection well |
| CN109681159B (en) * | 2017-10-17 | 2021-02-02 | 中国石油化工股份有限公司 | Oil field multitube layering water injection string |
| CN109681159A (en) * | 2017-10-17 | 2019-04-26 | 中国石油化工股份有限公司 | A kind of oil field multitube separate layer water injection string |
| US10890059B2 (en) | 2018-02-07 | 2021-01-12 | Petrochina Company Limited | Layered water injection system and layered water injection method |
| CN109184629A (en) * | 2018-08-30 | 2019-01-11 | 中国海洋石油集团有限公司 | A kind of selective sand control seperated layer water injection integral tubular column and its tripping in method |
| CN112824641A (en) * | 2019-11-21 | 2021-05-21 | 中国石油天然气股份有限公司 | Integrated oil production process pipe column |
| CN112824641B (en) * | 2019-11-21 | 2023-02-07 | 中国石油天然气股份有限公司 | Integrated oil production process pipe column |
| CN111502609A (en) * | 2020-04-21 | 2020-08-07 | 中国海洋石油集团有限公司 | Water injection sand prevention pipe column capable of cleaning annular space of screen sleeve and well cleaning method |
| CN113062699A (en) * | 2021-03-31 | 2021-07-02 | 代建伟 | Process method for carrying out layered injection well flushing by utilizing nitrogen injection |
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| CN1300441C (en) | 2007-02-14 |
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