CN204252980U - Layered water injection string - Google Patents
Layered water injection string Download PDFInfo
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- CN204252980U CN204252980U CN201420655707.1U CN201420655707U CN204252980U CN 204252980 U CN204252980 U CN 204252980U CN 201420655707 U CN201420655707 U CN 201420655707U CN 204252980 U CN204252980 U CN 204252980U
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a layered water injection pipe column, which comprises a pipe column which can extend into a sleeve of an oil and gas well, wherein the pipe column is provided with a first end which is close to the mouth of the oil and gas well and a second end which is far away from the mouth of the oil and gas well; the one-way valve is arranged close to the second end of the pipe column and can limit liquid in the pipe column to flow into the annular space of the casing pipe; the first packer is arranged between the first end of the pipe column and the one-way valve, and is provided with an anchoring assembly of one-way slips, and the one-way slips of the anchoring assembly can enable the first packer to be anchored on the casing pipe and can be set by means of gravity; and the second packer is arranged between the first packer and the one-way valve, and is provided with a setting mechanism which can be set through hydraulic pressure. The utility model discloses a layering water injection tubular column is through concatenating the packer that two pressure-bearing characteristics are different together, effectively solves the less not good problem of seat seal effect that leads to of packer because of the size in the small casing to realize the layering water injection of small casing.
Description
Technical field
The utility model belongs to separate zone waterflooding technology field, particularly relates to a kind of separate layer water injection string.
Background technology
Along with the exploitation in oil field, oil well edge-bottom water is no longer active, natural energy reduces, especially some oil field developments enter the underproduction phase of High water cut, if continue to rely on natural energy exploitation, the speed of then recovering the oil and recovery ratio are all very low, in order to improve the supply capability of oil reservoir, are the major measure keeping stratum energy to adopt at present by water filling boosting method.The pressure come in good ground by oil-field flooding huff and puff oil recovery method improves recovery ratio, Yanchang Oilfield productive life, guarantees the important means of oilfield stable production high yield, its essence takes the mining type of water drive oil in the mid-late oilfield development stage, the free water separated in underground water or crude oil is injected in oil reservoir, its effect mainly maintains oilbearing stratum pressure, ensureing balanced flood, namely filling the space of extraction oil by injecting water.
Oil-field flooding is roughly divided into closes note and dispensing technique.Wherein close note and be also called commingled water injection, it refers to and adopts same pressure at well head and each water filling layer do not split to the water injection technology of process; The advantage of the method is simple to operate, cost is lower, shortcoming lacks each stressor layer in underground to control, and due to each layer permeance property difference, while displacement of reservoir oil effect is produced to some oil reservoirs, then likely abnormal pressure is produced to other oil reservoir, cause injecting Shuitu to enter, along with the prolongation of water injection time, inject water and mainly enter the larger oil reservoir of permeability, time serious, even cause waterflooded reservoir.Therefore, close note and be applicable to the less and reservoir of each layer permeability basic simlarity of series of strata.And along with oilfield exploitation is to the middle and later periods, because the recovery time of each oil reservoir is different from exploitation dynamics, interlayer contradiction is caused to be aggravated, described interlayer contradiction aggravation refers to that interlayer permeability contrast is large, the ability that each layer allows fluid to pass through is different, use to close to note and can not meet the demands, now solving the conventional method of interlayer contradiction is adopt dispensing, so-called dispensing is the difference according to each oil-bearing stratum flooding displacement of reservoir oil handling capacity, the feed pressure of the water nozzle regulation and control implanted layer differed in size is installed at the corresponding site of different oil reservoir, reach reasonable distribution water injection rate pressure, to meet the object that each oil reservoir has enough pressure displacement of reservoir oils.
At present, in conventional cannula as 5in,
and the zonal injection technology in 7in sleeve pipe applies maturation, and the sleeve pipe of such as 4in still adopts commingled water injection mode.Trace it to its cause, be because sleeve pipe caliber reduces, cause casing annulus to reduce, carry out the important downhole tool-packer needed for seperated layer water injection, radial dimension arrangement is particularly thorny, causes the comparatively difficulty that the kit development of 4in small casing stratified injection water technology becomes.Particularly, due to packer to carry out operation in down-hole time, setting mechanism, locking mechanism, sealing mechanism need be had to conciliate sealing mechanism, also to there be anchor mechanism and Fan Xi mechanism if desired, these mechanisms are interrelated, cooperating, cause the structure of packer comparatively complicated meticulous, mechanism's action transmission each other needs certain space, and this just requires that packer must have predetermined size diametrically.And the annular space formed in 4in sleeve pipe is little compared with conventional cannula, under the prerequisite ensureing water injection rate, namely packer internal diameter can not be too little, otherwise water filling demand cannot be met, the radial space keeping for said mechanism like this will be very limited, ensureing basic to set, lock, seal and deblocking function prerequisite under, the size realizing the structure of these functions will diminish accordingly, and size diminish after mechanism must ensure certain precision again, therefore matching used packer development comparatively difficulty in 4in small casing.In addition, another factor hindering packer size to diminish is, the packer that size is less to set effect poor.With regard to conventional Y341 compression-type packer, it sets principle is substantially pressurize from the tubing string of well head, and hydraulic pressure passes to packer through tubing string, promotes to set piston press packing element, makes it cripling occur and set.Make packing element cripling be out of shape and finally set on sleeve pipe, larger extruding force need be applied, from formula to it:
F＝P·S
Wherein: F-extruding force;
P-pressure;
S-bearing area.
Surface pump group can the defeated pressure P of pump be certain, therefore extruding force F and bearing area S proportional.Obviously, the bearing area S of the packer that size is less is less, directly causes extruding force F to diminish, sets deleterious.
In sum, owing to there is no the packer with 4in small casing phase configuration in prior art, 4in small casing stratified injection water technology is caused to be difficult to realize.
Utility model content
Be difficult to for 4in small casing the problem realizing seperated layer water injection for prior art, the utility model provides a kind of separate layer water injection string.The thinking that this separate layer water injection string solves the seperated layer water injection of 4in small casing is serially connected by different for pressure-bearing feature two packers, form a packing units, to make in packing units two different packers hold respectively to press down, reach the object of 4in small casing seperated layer water injection.
The technical scheme that the utility model provides is as follows:
A kind of separate layer water injection string, comprising:
Can stretch into the tubing string in Oil/gas Well sleeve pipe, described tubing string has when stretching in described sleeve pipe, near the first end of described Oil/gas Well well head, and away from the second end of described well head, forms casing annulus between described tubing string and described sleeve pipe;
Be arranged at the one way valve near described second end, the liquid that described one way valve can be limited in described tubing string flows in described casing annulus;
Be arranged on the first packer between described first end and described one way valve, described first packer has the anchor of one-way slip, the one-way slip of described anchor mechanism can make described first packer be anchored on described sleeve pipe, and described first packer can rely on gravity to set;
Be arranged at the second packer between described first packer and described one way valve, described second packer has setting mechanism, and described second packer is by hydraulic setting.
A kind of separate layer water injection string described above, described first packer and described second packer are serially connected by described tubing string, and described first packer holds pressure, and described second packer holds and presses down.
A kind of separate layer water injection string described above, described first packer comprises top connection, lower contact and central tube, described top connection and described lower contact are connected to the two ends up and down of described central tube, from top to bottom be disposed with seal assembly, anchor and righting assembly outside described central tube, described seal assembly comprises spacer ring, adjustable ring, the cone gland of multiple packing element and respective numbers; Described multiple packing element is set in the outside of described central tube, and described spacer ring is sheathed between described packing element; The fixedly sleeved outside at described central tube of described adjustable ring, and with the upper surface phase contact of described multiple packing element; Described cone gland is socketed in the outside of described central tube, and with the lower surface phase contact of described multiple packing element.
A kind of separate layer water injection string described above, described anchor comprises cone, slips, and described cone and described slips fixed cover are located at outside described exterior central tube.
A kind of separate layer water injection string described above, described righting assembly comprises wiper block, centralizer body, centering ring; Described wiper block is set in outside described central tube, its upper surface and described slips lower surface phase contact, described wiper block is provided with anti-rotation pin, described centering ring place is provided with track pin, described central tube offers the track reversing groove that can slide for described track pin.
A kind of separate layer water injection string described above, described second packer comprises top connection, lower contact and central tube, described top connection and described lower contact are connected to the two ends up and down of described central tube, from top to bottom retaining mechanism is disposed with outside described central tube, sealing mechanism and setting mechanism, described setting mechanism comprises and sets cylinder sleeve and set piston, describedly set the outside that cylinder sleeve lower end is bolted in described lower contact, described setting forms first between cylinder sleeve and described central tube and sets cylinder, the described piston that sets can set in cylinder described first and moves vertically, describedly set piston bush piston comprising and is wholely set with it, the fixed piston between piston and described setting sleeve is set described in being fixedly installed on, described fixed piston and described setting sleeve form second and set cylinder, described central tube sidewall corresponds to described first and sets cylinder and described second and set cylinder and offer the first eyelet and the second eyelet respectively.
A kind of separate layer water injection string described above, described retaining mechanism comprises slide and adapter sleeve, described slide is provided with jump ring, described adapter sleeve inwall is provided with the zigzag snap close that can lock together with described jump ring, described adapter sleeve upper end is bolted in the outside of described top connection, described adapter sleeve and described central tube form locking cylinder, and described slide can move vertically in institute's locking cylinder; Be sheathed on the exterior central tube outside described central tube, be screwed onto described exterior central tube upper end by cap, described sliding sleeve is fixedly connected with by cap with described by deblocking pin.
A kind of separate layer water injection string described above, described sealing mechanism comprises spacer ring, upper baffle ring, the lower gear ring of multiple packing element and respective numbers; Described multiple packing element is set in the outside of described exterior central tube, and described spacer ring is sheathed between described packing element; The fixedly sleeved outside at described exterior central tube of described upper baffle ring, and with the upper surface phase contact of described multiple packing element; Described lower baffle ring is socketed in the outside of described exterior central tube, and with the lower surface phase contact of described multiple packing element.
A kind of separate layer water injection string described above, the end of described tubing string second end is provided with plug, between described plug and described one way valve, be provided with screen casing.
A kind of separate layer water injection string described above, comprise the first waterflood-transmission line and the second waterflood-transmission line, described first waterflood-transmission line and the second waterflood-transmission line are respectively arranged with first flow valve and the second flow valve, described first waterflood-transmission line can to water filling in described tubing string, described second waterflood-transmission line can to water filling in casing annulus, and described first flow valve and described second flow valve can control the injection flow of described first waterflood-transmission line and described second waterflood-transmission line respectively.
By above technical scheme, the beneficial effect of a kind of separate layer water injection string of the present utility model is: the seperated layer water injection that cannot realize 4in small casing for prior art, and the utility model provides a kind of separate layer water injection string.This separate layer water injection string by arranging the first packer and the second packer that are serially connected on tubing string, and utilize the feature of these two different packer pressure-bearings, make the first packer hold pressure, the second packer holds and presses down, and realizes the seperated layer water injection of 4in small casing.
In addition, a kind of separate layer water injection string of the present utility model by arranging first flow valve and the second flow valve respectively in the first water filling and the second waterflood-transmission line, the adjustment of the seperated layer water injection water yield can be realized on the ground, cancel conventional batch water filling and control water injection rate by pulling injection well downhole flow regulator, thus save operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of separate layer water injection string of the present utility model;
Fig. 2 is the structural representation of the first packer in Fig. 1;
Fig. 3 is the structural representation of the second packer in Fig. 1.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1.A kind of separate layer water injection string, comprise: can stretch into the tubing string 21 in Oil/gas Well sleeve pipe 19, described tubing string 21 has when stretching in described sleeve pipe 19, near the first end of described Oil/gas Well well head, with the second end away from described well head, between described tubing string 21 and described sleeve pipe 19, form casing annulus 17; Be arranged at the one way valve 23 near described second end, the liquid that described one way valve 23 can be limited in described tubing string 19 flows in described casing annulus 17; Be arranged on the first packer 1 between described first end and described one way valve 23, described first packer 1 has the anchor of one-way slip, the one-way slip of described anchor mechanism can make described first packer 1 be anchored on described sleeve pipe 19, and described first packer 1 can rely on gravity to set; Be arranged at the second packer 2 between described first packer 1 and described one way valve 23, described second packer 2 has setting mechanism, and described second packer 2 is by hydraulic setting.
Wherein the effect of one way valve 23 is: casing annulus 17 is divided into upper annular space 171 and lower annular space 172 by the packing units be made up of the first packer 1 and the second packer 2, steel ball is thrown in one way valve 23, steel ball is seated on the ball seat of one way valve 23, then in tubing string 19, suppress liquid to build the pressure, the power of building the pressure makes the second packer 2 set, and continues to suppress, after pressure exceedes certain value, ball seat in the related one way valve 23 of steel ball drops, and tubing string 19 and sleeve pipe 21 are connected.
A kind of separate layer water injection string of present embodiment by arranging the first packer 1 and the second packer 2 be serially connected on tubing string 19, utilize the feature of these two different packer pressure-bearings, make the first packer 1 hold pressure, the second packer 2 holds and presses down, and realizes the seperated layer water injection of 4in small casing.
For causing because packer size is less of existing of 4in small casing seperated layer water injection to set effect bad, the problem of seperated layer water injection cannot be realized, the thinking that a kind of separate layer water injection string of the present utility model provides is, packers different for two pressure-bearing features is serially connected, first packer 1 with one-way slip is utilized to hold the feature of pressure better performances, be arranged on the upper end of the second packer 2, make it bear pressure; Utilize the second packer 2 to adopt hydraulic setting to hold and press down the feature comparatively balanced, be arranged on the lower end of the first packer 1, make it hold and press down, both reach the object of the seperated layer water injection of 4in small casing with the use of setting.
What the first packer 1 in present embodiment adopted is that a kind of one-way slip supports the packer rotating tubing string and set, and its concrete structure schematic diagram refers to Fig. 2.Described first packer 1 comprises top connection 10, lower contact 20 and central tube 4, described top connection 10 and described lower contact 20 are connected to the two ends up and down of described central tube 4, from top to bottom be disposed with seal assembly, anchor and righting assembly outside described central tube 4, described seal assembly comprises spacer ring 6, adjustable ring 3, the cone gland 7 of multiple packing element 5 and respective numbers; Described multiple packing element 5 is set in the outside of described central tube 4, and described spacer ring 6 is sheathed between described packing element 5; The fixedly sleeved outside at described central tube 4 of described adjustable ring 3, and with the upper surface phase contact of described multiple packing element 5; Described cone gland 7 is socketed in the outside of described central tube 4, and with the lower surface phase contact of described multiple packing element 5.Described anchor comprises cone 8, slips 9, and described cone 8 and described slips 9 fixed cover are located at the outside of described central tube 4.Described righting assembly comprises wiper block 14, centralizer body 12, centering ring 16; Described wiper block 14 is set in the outside of described central tube 4, its upper surface and described slips 9 lower surface phase contact, described wiper block 14 is provided with anti-rotation pin 18, described centering ring 16 place is provided with track pin, described central tube 4 offers the track reversing groove that can slide for described track pin.
When first packer 1 is gone into the well, track pin is in the bottom dead centre of track reversing groove.In the process that the first packer enters for 1 time, rub owing to existing between centralizer body 12 and sleeve pipe 19, slips 9 has the trend moved up, and track pin shores the bottom dead centre of track reversing groove, is namely to prevent midway grappling; When down to design attitude, on carry the first packer 1 and make track pin be in the top dead-centre of track reversing groove, then rotate tubing string, track pin, by the frictional force between centralizer body 12 and sleeve pipe 19, throws off track reversing groove, transfer the first packer 1, cone 8 inserts slips 9, makes it softened and bites the inwall of sleeve pipe 19, at this moment transferring tubing string 21 again, under the Action of Gravity Field of tubing string 21, the packing element 5 of the first packer 1 is set by compression.
Owing to having the anchor of one-way slip, and the feature relying on gravity to set, therefore the first packer 1 holds pressure better performances, and common Y211 type packer can be adopted as the first packer 1.
The structural representation of the second packer 2 in present embodiment refers to Fig. 3.Described second packer 2 comprises top connection 30, lower contact 40 and central tube 49, described top connection 30 and described lower contact 40 are connected to the two ends up and down of described central tube 49, from top to bottom retaining mechanism is disposed with outside described central tube 49, sealing mechanism and setting mechanism, described setting mechanism comprises and sets cylinder sleeve 33 and set piston 35, describedly set the outside that cylinder sleeve 33 lower end is bolted in described lower contact 40, described setting forms first between cylinder sleeve 33 and described central tube 49 and sets cylinder 34, the described piston 35 that sets can set in cylinder 34 described first and moves vertically, describedly set the piston bush 38 piston 35 comprising and is wholely set with it, the fixed piston 36 between piston 35 and described setting sleeve 38 is set described in being fixedly installed on, described fixed piston 36 forms second with described setting sleeve 39 and sets cylinder 37, described central tube 49 sidewall corresponds to described first and sets cylinder 34 and described second and set cylinder 37 and offer the first eyelet 31 and the second eyelet 32 respectively.When suppressing liquid by tubing string 19 in the second packer 2, the liquid entered through the first eyelet 31 sets in cylinder 34 first and builds the pressure, highly pressurised liquid promotes to be arranged on the first piston 35 that sets set in cylinder 34 and moves up vertically, and then drives the setting sleeve 38 be wholely set with it to move; The liquid entered through the second eyelet 32 sets in cylinder 37 second and builds the pressure, and highly pressurised liquid acts directly on setting sleeve 38 and moves it, and by making a concerted effort, extruding force is increased.
Described retaining mechanism comprises slide 52 and adapter sleeve 44, described slide 52 is provided with jump ring 46, described adapter sleeve 44 inwall is provided with the zigzag snap close 45 that can lock together with described jump ring 46, described adapter sleeve 44 upper end is bolted in the outside of described top connection 30, described adapter sleeve 44 forms locking cylinder 53 with described central tube 49, and described slide 52 can move vertically in institute's locking cylinder 53; Be sheathed on the exterior central tube 50 outside described central tube 49, be screwed onto described exterior central tube 50 upper end by cap 48, described sliding sleeve 52 is fixedly connected with by cap 48 with described by deblocking pin 47.
Described sealing mechanism comprises packing element 41 and packing element 42, and the spacer ring 15 of respective numbers, upper baffle ring 43, lower gear ring 39; Described packing element 41, packing element 42 and packing element 53 are set in the outside of described exterior central tube 50, and described spacer ring 51 is sheathed between described packing element 41 and packing element 42; The fixedly sleeved outside at described exterior central tube 50 of described upper baffle ring 43, and with the upper surface phase contact of described packing element 41; Described lower baffle ring 39 is socketed in the outside of described exterior central tube 50, and with the lower surface phase contact of described packing element 53.
The operating principle of the second packer 2 is: highly pressurised liquid sets piston 35 and setting sleeve 38 by acting on, and promotes the up extruding packing element 53 of lower baffle ring 39.In order to balance extruding force, a kind of separate layer water injection string of the present utility model have employed the packing element of different hardness, specifically packing element 41 and packing element 53 are ebonite cylinders, packing element 42 soft gum tube, therefore when exterior central tube 50 move packing element is out of shape time, be first packing element 41 and packing element 53 occur cripling distortion, along with hydraulic pressure continue increase, the ebonite cylinder 42 be between packing element 53 and packing element 41 is out of shape, until set completely.In the process that exterior central tube 50 is up, what be arranged at exterior central tube 50 upper end is driven slide 52 to move up by cap 48 by deblocking pin 47, lock together to the jump ring 46 on slide 52 and the zigzag snap close 45 on adapter sleeve 44, when after pressure release, make exterior central tube 50 can not descending automatic deblocking.During deblocking, upper lifting pipe post 19, exterior central tube 50 drives is had up trend by cap 48, adapter sleeve 44 is fixed by the frictional force between packing element and sleeve pipe 21, makes to connect the effect being subject to shearing force by cap 48 and the deblocking pin 47 of adapter sleeve 44, and is greater than the shearing resistance of deblocking pin 47 due to the frictional force between packing element and sleeve pipe 21, thus deblocking pin 47 is cut off, the constraint release that exterior central tube 50 is subject to and descending, makes packing element reinstatement, complete deblocking.
Second packer 2 sets piston press packing element by hydraulic drive and sets, and therefore can adopt conventional Y341 type compression packer.
In present embodiment, the end of described tubing string 19 second end is provided with plug 27, between described plug 27 and described one way valve 23, be provided with screen casing 25.
During water filling, a kind of separate layer water injection string of present embodiment comprises the first waterflood-transmission line 151 and the second waterflood-transmission line 131, described first waterflood-transmission line 151 and the second waterflood-transmission line 131 are respectively arranged with first flow valve 15 and the second flow valve 13, described first waterflood-transmission line 151 can to water filling in described tubing string 19, described second waterflood-transmission line 131 can upwards water filling in annular space 171, and described first flow valve 15 and described second flow valve 13 can control the injection flow of described first waterflood-transmission line 151 and described second waterflood-transmission line 131 respectively.By arranging first flow valve 15 and the second flow valve 13 respectively on the first waterflood-transmission line 151 and the second waterflood-transmission line 131, the adjustment of the seperated layer water injection water yield can be realized on the ground, cancel conventional batch water filling and control water injection rate by pulling injection well downhole flow regulator, thus save operation.
A kind of separate layer water injection string of the present utility model by arranging the first packer and the second packer that are serially connected on tubing string, utilize the feature of these two different packer pressure-bearings, make the first packer hold pressure, the second packer holds and presses down, and realizes the seperated layer water injection of 4in small casing.The thinking that certain the utility model provides, by the packer composition packing units that pressure-bearing feature is different, non-not the holding of each packer is pressed down, and not only can be applied to the seperated layer water injection of 4in small casing, the seperated layer water injection of conventional cannula is suitable for too.
In addition, a kind of separate layer water injection string of the present utility model by arranging first flow valve and the second flow valve respectively in the first water filling and the second waterflood-transmission line, the adjustment of the seperated layer water injection water yield can be realized on the ground, cancel conventional batch water filling and control water injection rate by pulling injection well downhole flow regulator, thus save operation.
The foregoing is only several embodiment of the present utility model, those skilled in the art can carry out various change or modification to the utility model embodiment according to content disclosed in application documents and not depart from spirit and scope of the present utility model.
Claims (10)
1. a separate layer water injection string, is characterized in that, comprising:
Can stretch into the tubing string in Oil/gas Well sleeve pipe, described tubing string has when stretching in described sleeve pipe, near the first end of described Oil/gas Well well head, and away from the second end of described well head, forms casing annulus between described tubing string and described sleeve pipe;
Be arranged at the one way valve near described second end, the liquid that described one way valve can be limited in described tubing string flows in described casing annulus;
Be arranged on the first packer between described first end and described one way valve, described first packer has the anchor of one-way slip, the one-way slip of described anchor can make described first packer be anchored on described sleeve pipe, and described first packer can rely on gravity to set;
Be arranged at the second packer between described first packer and described one way valve, described second packer has setting mechanism, and described second packer is by hydraulic setting.
2. separate layer water injection string as claimed in claim 1, is characterized in that: described first packer and described second packer are serially connected by described tubing string, and described first packer holds pressure, and described second packer holds and presses down.
3. separate layer water injection string as claimed in claim 1, it is characterized in that: described first packer comprises top connection, lower contact and central tube, described top connection and described lower contact are connected to the two ends up and down of described central tube, from top to bottom be disposed with seal assembly, anchor and righting assembly outside described central tube, described seal assembly comprises spacer ring, adjustable ring, the cone gland of multiple packing element and respective numbers; Described multiple packing element is set in the outside of described central tube, and described spacer ring is sheathed between described packing element; The fixedly sleeved outside at described central tube of described adjustable ring, and with the upper surface phase contact of described multiple packing element; Described cone gland is socketed in the outside of described central tube, and with the lower surface phase contact of described multiple packing element.
4. separate layer water injection string as claimed in claim 3, it is characterized in that: described anchor comprises cone, slips, described cone and described slips fixed cover are located at outside described central tube.
5. separate layer water injection string as claimed in claim 4, is characterized in that: described righting assembly comprises wiper block, centralizer body, centering ring; Described wiper block is set in outside described central tube, its upper surface and described slips lower surface phase contact, described wiper block is provided with anti-rotation pin, described centering ring place is provided with track pin, described central tube offers the track reversing groove that can slide for described track pin.
6. separate layer water injection string as claimed in claim 1, it is characterized in that: described second packer comprises top connection, lower contact and central tube, described top connection and described lower contact are connected to the two ends up and down of described central tube, from top to bottom retaining mechanism is disposed with outside described central tube, sealing mechanism and setting mechanism, described setting mechanism comprises and sets cylinder sleeve and set piston, describedly set the outside that cylinder sleeve lower end is bolted in described lower contact, described setting forms first between cylinder sleeve and described central tube and sets cylinder, the described piston that sets can set in cylinder described first and moves vertically, describedly set piston bush piston comprising and is wholely set with it, the fixed piston between piston and described setting sleeve is set described in being fixedly installed on, described fixed piston and described setting sleeve form second and set cylinder, described central tube sidewall corresponds to described first and sets cylinder and described second and set cylinder and offer the first eyelet and the second eyelet respectively.
7. separate layer water injection string as claimed in claim 6, it is characterized in that: described retaining mechanism comprises slide and adapter sleeve, described slide is provided with jump ring, described adapter sleeve inwall is provided with the zigzag snap close that can lock together with described jump ring, described adapter sleeve upper end is bolted in the outside of described top connection, described adapter sleeve and described central tube form locking cylinder, and described slide can move vertically in institute's locking cylinder; Be sheathed on the exterior central tube outside described central tube, be screwed onto described exterior central tube upper end by cap, described sliding sleeve is fixedly connected with by cap with described by deblocking pin.
8. separate layer water injection string as claimed in claim 7, is characterized in that: described sealing mechanism comprises spacer ring, upper baffle ring, the lower gear ring of multiple packing element and respective numbers; Described multiple packing element is set in the outside of described exterior central tube, and described spacer ring is sheathed between described packing element; The fixedly sleeved outside at described exterior central tube of described upper baffle ring, and with the upper surface phase contact of described multiple packing element; Described lower baffle ring is socketed in the outside of described exterior central tube, and with the lower surface phase contact of described multiple packing element.
9. separate layer water injection string as claimed in claim 1, is characterized in that: the end of described tubing string second end is provided with plug, between described plug and described one way valve, be provided with screen casing.
10. the separate layer water injection string as described in any one of claim 1 to 9, it is characterized in that: comprise the first waterflood-transmission line and the second waterflood-transmission line, described first waterflood-transmission line and the second waterflood-transmission line are respectively arranged with first flow valve and the second flow valve, described first waterflood-transmission line can to water filling in described tubing string, described second waterflood-transmission line can to water filling in casing annulus, and described first flow valve and described second flow valve can control the injection flow of described first waterflood-transmission line and described second waterflood-transmission line respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420655707.1U CN204252980U (en) | 2014-11-05 | 2014-11-05 | Layered water injection string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420655707.1U CN204252980U (en) | 2014-11-05 | 2014-11-05 | Layered water injection string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204252980U true CN204252980U (en) | 2015-04-08 |
Family
ID=52957300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420655707.1U Expired - Fee Related CN204252980U (en) | 2014-11-05 | 2014-11-05 | Layered water injection string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204252980U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929590A (en) * | 2015-05-29 | 2015-09-23 | 中国石油天然气股份有限公司 | Underground sealing device |
| CN110195578A (en) * | 2019-03-18 | 2019-09-03 | 中国石油化工股份有限公司 | The seperated layer water injection system of small casing pipe well |
| CN111271021A (en) * | 2020-03-23 | 2020-06-12 | 牡丹江市井田石油钻采配件有限公司 | Anchoring type packer for leakage finding and string checking |
| CN117433916A (en) * | 2023-12-20 | 2024-01-23 | 中国石油集团渤海钻探工程有限公司 | Air energy storage well is with annotating and producing packer testing arrangement |
-
2014
- 2014-11-05 CN CN201420655707.1U patent/CN204252980U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929590A (en) * | 2015-05-29 | 2015-09-23 | 中国石油天然气股份有限公司 | Underground sealing device |
| CN104929590B (en) * | 2015-05-29 | 2017-09-15 | 中国石油天然气股份有限公司 | Underground sealing device |
| CN110195578A (en) * | 2019-03-18 | 2019-09-03 | 中国石油化工股份有限公司 | The seperated layer water injection system of small casing pipe well |
| CN110195578B (en) * | 2019-03-18 | 2023-05-12 | 中国石油化工股份有限公司 | Separate layer water injection system of small cased well |
| CN111271021A (en) * | 2020-03-23 | 2020-06-12 | 牡丹江市井田石油钻采配件有限公司 | Anchoring type packer for leakage finding and string checking |
| CN117433916A (en) * | 2023-12-20 | 2024-01-23 | 中国石油集团渤海钻探工程有限公司 | Air energy storage well is with annotating and producing packer testing arrangement |
| CN117433916B (en) * | 2023-12-20 | 2024-02-23 | 中国石油集团渤海钻探工程有限公司 | Air energy storage well is with annotating and producing packer testing arrangement |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20150408 |