CN103775021A - Water plugging pipe column suitable for small partitioning layer plug bottom water well and water plugging method - Google Patents
Water plugging pipe column suitable for small partitioning layer plug bottom water well and water plugging method Download PDFInfo
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- CN103775021A CN103775021A CN201410009590.4A CN201410009590A CN103775021A CN 103775021 A CN103775021 A CN 103775021A CN 201410009590 A CN201410009590 A CN 201410009590A CN 103775021 A CN103775021 A CN 103775021A
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Abstract
The invention provides a water plugging pipe column suitable for a small partitioning layer plug bottom water well and a water plugging method. The water plugging pipe column comprises a first oil pipe, a hydraulic releasing tool, a second oil pipe, a locating short section, a third oil pipe, a hydraulic packer, a fourth oil pipe, a long rubber cylinder packer and a screwed plug which are connected in sequence. The water plugging method comprises the steps that the water plugging column goes down to an appointed position in the well, so that the position of the hydraulic packer and an upper partitioning layer correspond, the position of the long rubber cylinder packer and a lower partitioning layer correspond, the upper partitioning layer is placed between an upper oil layer and a middle oil layer, the lower partitioning layer is placed between the middle oil layer and a lower oil layer, liquid is injected into the water plugging pipe column from a well opening and is pressurized to reach a first pressure value, the hydraulic packer and the side wall of the upper partitioning layer are subjected to corresponding setting, the long rubber cylinder packer is set on the side wall of the lower partitioning layer, liquid is continuously injected into the water plugging pipe column from the well opening and is pressurized to reach a second pressure value, so that the upper portion and the lower portion of the hydraulic releasing tool are separated, the upper portion of the tool is taken from the well along with the first oil pipe, and the first pressure value is smaller than the second pressure value.
Description
Technical field
The invention belongs to field of petroleum exploitation, in particular to a kind of water plugging string and shutoff method that is suitable for well of the stifled end of little interlayer.
Background technology
In oil exploitation, bottom water reservoir is once water coning enters pit shaft, must cause well water to rise, economic benefit variation, have even because of the moisture closing well of height.To control end water object in order reaching, in Development Practice, to have carried out various trials,, under rate of oil production, exploit etc. to control away from oil-water interfaces perforation, inject gel, squeeze the measures such as ash or lower bridging plug by chemical method as far as possible.But it is high that chemical method is injected gel measure cost, period of validity is short; Squeeze grey measure and easily cause oil layer pollution, therefore, bridging plug mode under adopt at present more.
But for septulum layer high water-cut reservoir, because of interlayer less, common process cannot meet layering demand as bridging plug packer etc., in recent years after long packing element packer is succeeded in developing, such oil reservoir uses the releasing type anchor packer connecting by oil pipe mostly, side direction list stays valve, the process pipe string that long packing element packer and plug form is exploited, but when implementing at the scene, this technology often finds following problem: existing side direction list stays valve in the time that tubing string sets, often occur not playing pressure because side direction list stays valve leakage, packer does not set affects this process implementing success rate, and, in the time that sand production buries feed pathway, can reduce oil well pump detection period, in addition, back-off packer must descend oil reservoir top, affect time pump degree of depth.
In view of this, the design people, according to the Production design experience of being engaged in for many years this area and association area, develops a kind of water plugging string and shutoff method that is suitable for well of the stifled end of little interlayer, the problem existing to solving prior art.
Summary of the invention
The object of this invention is to provide a kind of water plugging string and shutoff method that is suitable for well of the stifled end of little interlayer, by hydraulic packer, long packing element packer are set, utilize strata pressure, realize and being firmly anchored in oil well in without slips situation, overcome the defect of prior art.
For this reason, the present invention proposes a kind of water plugging string that is suitable for well of the stifled end of little interlayer, and this water plugging string comprises the first oil pipe, hydraulic releasing tool, the second oil pipe, orientation spool, the 3rd oil pipe, hydraulic packer, the 4th oil pipe, long packing element packer and the plug that connect successively from top to bottom.
Water plugging string and the shutoff method that is suitable for well of the stifled end of little interlayer as above, wherein, described long packing element packer is K341 type long packing element packer.
The present invention also proposes a kind of shutoff method that uses above-mentioned water plugging string, and described shutoff method comprises:
By the assigned address under this water plugging string lower going-into-well, make the position of this hydraulic packer and the upper interlayer of down-hole corresponding, and the position of this long packing element packer is corresponding with the lower interlayer of down-hole, wherein, on this, interlayer is between the upper oil reservoir and middle oil reservoir of down-hole, and this lower interlayer is in this between oil reservoir and lower oil reservoir;
In from well head to this water plugging string, fluid injection is suppressed to the first force value, make corresponding the setting of sidewall of this hydraulic packer and interlayer on this, and this long packing element packer sets the side-walls in this lower interlayer;
In continuing from well head to this water plugging string, fluid injection is suppressed to the second force value, the top of this hydraulic releasing tool and bottom is thrown off, and its top is taken out from down-hole with this first oil pipe, and wherein, this first force value is less than this second force value.
Shutoff method as above, wherein, this first force value is 16MPa, this second force value is 20MPa.
The water plugging string and the shutoff method that are suitable for well of the stifled end of little interlayer of the present invention's proposition, its reliable operation, by hydraulic packer, long packing element packer etc. are set, and correspondence sets in upper interlayer and lower interlayer, act on this hydraulic packer and long packing element packer in order to the strata pressure of using oil reservoir, middle oil reservoir and lower oil reservoir, this water plugging string of balance is stressed down-hole, makes it stressed evenly, realizes and being firmly anchored in oil well in without slips situation.In addition, compared with prior art, pump of the present invention is deeply unrestricted, can be according to actual needs, select the oil pipe of respective length to connect, can be effectively lower to oil well bottom, improve and be constructed into power, extend pump detection period, reduced card well risk, had broad application prospects.
Accompanying drawing explanation
The following drawings is only intended to the present invention to schematically illustrate and explain, not delimit the scope of the invention.Wherein:
Fig. 1 is the composition structural representation of the water plugging string that is suitable for well of the stifled end of little interlayer of the present invention.
Critical element label declaration:
11 first oil pipe 12 hydraulic releasing tools
13 second oil pipe 14 orientation spools
15 the 3rd oil pipe 16 hydraulic packers
17 the 4th oil pipe 18 long packing element packers
19 plugs
The specific embodiment
The invention provides a kind of water plugging string that is suitable for well of the stifled end of little interlayer, it comprises the first oil pipe, hydraulic releasing tool, the second oil pipe, orientation spool, the 3rd oil pipe, hydraulic packer, the 4th oil pipe, long packing element packer and the plug that connect successively from top to bottom.
The present invention also proposes a kind of shutoff method that uses above-mentioned water plugging string, described shutoff method comprises: by the assigned address under this water plugging string lower going-into-well, make the position of this hydraulic packer and the upper interlayer of down-hole corresponding, and the position of this long packing element packer is corresponding with the lower interlayer of down-hole, wherein, on this, interlayer is between the upper oil reservoir and middle oil reservoir of down-hole, and this lower interlayer is in this between oil reservoir and lower oil reservoir; In from well head to this water plugging string, fluid injection is suppressed to the first force value, make corresponding the setting of sidewall of this hydraulic packer and interlayer on this, and this long packing element packer sets the side-walls in this lower interlayer; In continuing from well head to this water plugging string, fluid injection is suppressed to the second force value, the top of this hydraulic releasing tool and bottom is thrown off, and its top is taken out from down-hole with this first oil pipe, and wherein, this first force value is less than this second force value.
The water plugging string and the shutoff method that are suitable for well of the stifled end of little interlayer of the present invention's proposition, its reliable operation, by long packing element packer, hydraulic packer etc. are set, compared with prior art, realize and being firmly anchored in oil well in without slips situation, and pump of the present invention is deeply unrestricted, has improved and has been constructed into power and pump detection period, reduce card well risk, had broad application prospects.
Understand for technical characterictic of the present invention, object and effect being had more clearly, below in conjunction with accompanying drawing and preferred embodiment, the water plugging string that is suitable for well of the stifled end of little interlayer that the present invention is proposed and the specific embodiment, structure, feature and effect of shutoff method, be described in detail as follows.In addition, by the explanation of the specific embodiment, when can more being goed deep into concrete understanding for technological means and effect of reaching predetermined object and taking to the present invention, however institute's accompanying drawing be only to provide with reference to and explanation use, be not used for the present invention to be limited.
Fig. 1 is the composition structural representation of the water plugging string that is suitable for well of the stifled end of little interlayer of the present invention.
As shown in Figure 1, the water plugging string that is suitable for well of the stifled end of little interlayer of the present invention's proposition, comprise the first oil pipe 11 connecting successively from top to bottom, hydraulic releasing tool 12, the second oil pipe 13, orientation spool 14, the 3rd oil pipe 15, hydraulic packer 16, the 4th oil pipe 17, long packing element packer 18 and plug 19, wherein, this hydraulic releasing tool 12 is called again releasing tool, to suppress by fluid injection in use, after being thrown off, its top (upper body of giving up) and bottom (lower body of giving up) take out from down-hole, so that follow-up use, and by orientation spool is set, under lower going-into-well of the present invention time, can accurately locate, be pointed out that, above-mentioned hydraulic releasing tool, orientation spool, hydraulic packer, composition structure and the operating principle of long packing element packer are prior art, do not repeat them here.In addition, for the concrete length of the first oil pipe to the four oil pipes, shown in scheming, be not limited, can select according to actual needs, to meet the dark needs of different pumps.Wherein, described long packing element packer 18 is preferably K341 type long packing element packer.
Referring to Fig. 1, for the oil well of septulum layer high water-cut reservoir, in the time that the present invention is lowered into down-hole, by 16 times upper interlayer 22a places to down-hole of hydraulic packer, and 18 times lower interlayer 22b places to down-hole of long packing element packer, illustrate knownly, on this, interlayer 22a is between the upper oil reservoir 21a and middle oil reservoir 21b of down-hole, and this lower interlayer 22b is in this between oil reservoir 21b and lower oil reservoir 21c, in from well head to this water plugging string, fluid injection is suppressed, make hydraulic packer 16 and long packing element packer 18 correspondences set interlayer 22a and lower interlayer 22b place on this, with by the upper oil reservoir 21a of down-hole, middle oil reservoir 21b and lower oil reservoir 21c separate, wherein, liquid on this in oil reservoir 21a and middle oil reservoir 21b is exerted pressure to the both sides up and down of this hydraulic packer 14, and the liquid in this in oil reservoir 21b and lower oil reservoir 21c is exerted pressure to the both sides up and down of this long packing element packer 18, make this hydraulic packer 14 and long packing element packer 18 respectively under less individual event pressure reduction, because above-mentioned each individual event pressure reduction is less, and both itself all have the performance that can bear individual event pressure reduction, thereby realize this hydraulic packer 16 and long packing element packer 18 grapplings and sealing, , oil reservoir in utilization, the strata pressure of middle oil reservoir and lower oil reservoir acts on this hydraulic packer and long packing element packer, this water plugging string of balance is stressed down-hole, make it stressed evenly, guarantee the effective sealing of the present invention in down-hole, not play, continue fluid injection and suppress, after the top that makes hydraulic releasing tool and bottom disengagement, take out from down-hole.Subsequently, can normally descend pump to carry out mining operations.
In addition, the present invention also proposes a kind of shutoff method that uses above-mentioned water plugging string, and described shutoff method comprises:
By the assigned address under this water plugging string lower going-into-well, make the position of this hydraulic packer and the upper interlayer of down-hole corresponding, and the position of this long packing element packer is corresponding with the lower interlayer of down-hole, wherein, on this, interlayer is between the upper oil reservoir and middle oil reservoir of down-hole, and this lower interlayer is in this between oil reservoir and lower oil reservoir;
In from well head to this water plugging string, fluid injection is suppressed to the first force value, make corresponding the setting of sidewall of this hydraulic packer and interlayer on this, and this long packing element packer sets the side-walls in this lower interlayer;
In continuing from well head to this water plugging string, fluid injection is suppressed to the second force value, the top of this hydraulic releasing tool and bottom are thrown off, and its top is taken out from down-hole with this first oil pipe, be i.e. this hydraulic releasing tool action of giving up, wherein, this first force value is less than this second force value.Subsequently, can normally descend pump to carry out mining operations.Wherein, preferably this first force value is 16MPa, and this second force value is 20MPa.
The water plugging string and the shutoff method that are suitable for well of the stifled end of little interlayer of the present invention's proposition, its reliable operation, by hydraulic packer, long packing element packer etc. are set, and correspondence sets in upper interlayer and lower interlayer, act on this hydraulic packer and long packing element packer in order to the strata pressure of using oil reservoir, middle oil reservoir and lower oil reservoir, this water plugging string of balance is stressed down-hole, makes it stressed evenly, realizes and being firmly anchored in oil well in without slips situation.In addition, compared with prior art, pump of the present invention is deeply unrestricted, can be according to actual needs, select the oil pipe of respective length to connect, can be effectively lower to oil well bottom, improve and be constructed into power, extend pump detection period, reduced card well risk, had broad application prospects.
The foregoing is only the schematic specific embodiment of the present invention, not in order to limit scope of the present invention.Any those skilled in the art, not departing from equivalent variations and the modification done under the prerequisite of design of the present invention and principle, all should belong to the scope of protection of the invention.
Claims (4)
1. one kind is suitable for the water plugging string of well of the stifled end of little interlayer, it is characterized in that, this water plugging string comprises the first oil pipe, hydraulic releasing tool, the second oil pipe, orientation spool, the 3rd oil pipe, hydraulic packer, the 4th oil pipe, long packing element packer and the plug that connect successively from top to bottom.
2. the water plugging string that is suitable for well of the stifled end of little interlayer as claimed in claim 1, is characterized in that, described long packing element packer is K341 type long packing element packer.
3. a shutoff method that uses water plugging string as claimed in claim 1 or 2, described shutoff method comprises:
By the assigned address under this water plugging string lower going-into-well, make the position of this hydraulic packer and the upper interlayer of down-hole corresponding, and the position of this long packing element packer is corresponding with the lower interlayer of down-hole, wherein, on this, interlayer is between the upper oil reservoir and middle oil reservoir of down-hole, and this lower interlayer is in this between oil reservoir and lower oil reservoir;
In from well head to this water plugging string, fluid injection is suppressed to the first force value, make corresponding the setting of sidewall of this hydraulic packer and interlayer on this, and this long packing element packer sets the side-walls in this lower interlayer;
In continuing from well head to this water plugging string, fluid injection is suppressed to the second force value, the top of this hydraulic releasing tool and bottom is thrown off, and its top is taken out from down-hole with this first oil pipe, and wherein, this first force value is less than this second force value.
4. shutoff method as claimed in claim 3, is characterized in that, this first force value is 16MPa, and this second force value is 20MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009590.4A CN103775021A (en) | 2014-01-09 | 2014-01-09 | Water plugging pipe column suitable for small partitioning layer plug bottom water well and water plugging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410009590.4A CN103775021A (en) | 2014-01-09 | 2014-01-09 | Water plugging pipe column suitable for small partitioning layer plug bottom water well and water plugging method |
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| CN103775021A true CN103775021A (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410009590.4A Pending CN103775021A (en) | 2014-01-09 | 2014-01-09 | Water plugging pipe column suitable for small partitioning layer plug bottom water well and water plugging method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145120A (en) * | 2020-10-23 | 2020-12-29 | 华北科技学院 | Double-end water plugging device and method for preventing drill hole from being plugged |
Citations (8)
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|---|---|---|---|---|
| US4018272A (en) * | 1975-04-07 | 1977-04-19 | Brown Oil Tools, Inc. | Well packer apparatus |
| US4190107A (en) * | 1978-08-25 | 1980-02-26 | Baker International Corporation | Well bore apparatus with hydraulically releasable tubing seal unit |
| CN101042045A (en) * | 2007-04-18 | 2007-09-26 | 刘玉文 | Method of intelligent mechanical looking for water-shutoff and used pipe column |
| CN101250987A (en) * | 2008-03-27 | 2008-08-27 | 中国石油化工股份有限公司 | Method for testing and dislodging oil well intelligent delamination |
| CN201448088U (en) * | 2009-05-19 | 2010-05-05 | 西安方元能源工程有限责任公司 | Deep-well removable bridge plug |
| CN101864921A (en) * | 2010-06-11 | 2010-10-20 | 大港油田集团有限责任公司 | Well completion and oil production string of horizontal well and well completion and oil production processes thereof |
| CN102134982A (en) * | 2011-02-11 | 2011-07-27 | 孔利生 | Multilayer gravel packing method and tool |
| CN102852467A (en) * | 2011-06-30 | 2013-01-02 | 中国石油天然气股份有限公司 | Separate zone production technical string capable of protecting oil reservoirs |
-
2014
- 2014-01-09 CN CN201410009590.4A patent/CN103775021A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4018272A (en) * | 1975-04-07 | 1977-04-19 | Brown Oil Tools, Inc. | Well packer apparatus |
| US4190107A (en) * | 1978-08-25 | 1980-02-26 | Baker International Corporation | Well bore apparatus with hydraulically releasable tubing seal unit |
| CN101042045A (en) * | 2007-04-18 | 2007-09-26 | 刘玉文 | Method of intelligent mechanical looking for water-shutoff and used pipe column |
| CN101250987A (en) * | 2008-03-27 | 2008-08-27 | 中国石油化工股份有限公司 | Method for testing and dislodging oil well intelligent delamination |
| CN201448088U (en) * | 2009-05-19 | 2010-05-05 | 西安方元能源工程有限责任公司 | Deep-well removable bridge plug |
| CN101864921A (en) * | 2010-06-11 | 2010-10-20 | 大港油田集团有限责任公司 | Well completion and oil production string of horizontal well and well completion and oil production processes thereof |
| CN102134982A (en) * | 2011-02-11 | 2011-07-27 | 孔利生 | Multilayer gravel packing method and tool |
| CN102852467A (en) * | 2011-06-30 | 2013-01-02 | 中国石油天然气股份有限公司 | Separate zone production technical string capable of protecting oil reservoirs |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145120A (en) * | 2020-10-23 | 2020-12-29 | 华北科技学院 | Double-end water plugging device and method for preventing drill hole from being plugged |
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Application publication date: 20140507 |