CN102278101B - Subdivided layer watered oil extraction pipe column - Google Patents
Subdivided layer watered oil extraction pipe column Download PDFInfo
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- CN102278101B CN102278101B CN201110255446.5A CN201110255446A CN102278101B CN 102278101 B CN102278101 B CN 102278101B CN 201110255446 A CN201110255446 A CN 201110255446A CN 102278101 B CN102278101 B CN 102278101B
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Abstract
The invention relates to a subdivided layer watered oil extraction pipe column for high-salinity oil deposit. The subdivided layer watered oil extraction pipe column comprises an oil pipe, wherein a watered packer is arranged at the lower end of the oil pipe; the watered packer is connected with a watered oil pumping pump and a sealing insertion pipe sequentially from top down; the sealing insertion pipe is connected to a lower joint at the lower end of the watered oil pumping pump and is inserted into a sealing cylinder; a small oil pipe is arranged in the sealing insertion pipe; the small oil pipe is connected to an oil extraction short section at the lower end of the watered oil pumping pump; a hanging packer is connected to the lower part of the sealing cylinder; and a constant pressure switch, a water plugging packer and a setting ball base are connected to the lower end of the hanging packer sequentially from top down. By the subdivided layer watered oil extraction pipe column, the overflowing area of a watered channel is increased, the anti-plugging performance of the pipe column is enhanced, the concentration of output liquid in high-salinity oil deposit strata is reduced effectively, and the plugging is prevented; and the communication between productive layers and upper and lower plugging layers can be isolated effectively, and the subdivided layer watered oil extraction of high-salinity oil deposit thin oil layers is realized, so the problem of selective extraction cannot be realized is solved.
Description
Technical field
The present invention relates to a kind of petroleum gas field oil well production downhole tool and combine, relate in particular to a kind of fine-separate layer water-mixed oil production tubing string for high salinity reservoirs was.
Background technology
In the manufacturing process of the higher high salinity reservoirs was of stratum production fluid salinity, oil well knot cream, the appearance of analysing the problem such as salt, fouling will have a strong impact on the normal exploitation in oil field.For avoiding causing holddown, salt to block up and casing corrosion, the exploitation of such oil reservoir is generally all needed to mix clear water to reduce production fluid concentration.In addition, also there is the feature that layer is many, layer is thin, heterogeneity is serious in part high salinity reservoirs was, under the exploitation pattern of long-term " close to adopt and close note ", serious, the non-main layer development degree of main layer water logging is poor, oil reservoir is exerted oneself, and uneven phenomenon is also very serious, thereby need to adopt subdivision of reservoir mode to exploit.
For reducing described high salinity reservoirs was stratum production fluid concentration, China Patent No. is that 200620099437.6 disclosed a kind of bridge leak stoppage limbs utilize oil pipe to connect the oil jacket annular space at upper and lower two packer shutoff casing failure places with oil recovery passage and water mixing passage, prevents that formation water from flowing out from casing failure; And connect the above water mixing passage of lower packet by capillary stainless steel tube, and make the clear water adding from top oil jacket annular space arrive bottom oil layer through water mixing passage and the capillary stainless steel tube of packer, realize the object that reduces stratum production fluid concentration.Because this tubing string utilizes the less capillary stainless steel tube in aperture as water mixing passage, to install complicated and easily stop up in water mixing process, maintenance cost is high, and this tubing string can only be exploited lower floor in addition, cannot really realize the subdivision of reservoir exploitation to high salinity reservoirs was.
Summary of the invention
Technical problem to be solved by this invention is the deficiency existing for above-mentioned prior art and a kind of fine-separate layer water-mixed oil production tubing string that high salinity reservoirs was uses that is suitable for is provided, it can not only effectively reduce high salinity reservoirs was stratum production fluid concentration, avoid stopping up, and can realize high salinity reservoirs was oil sheet is carried out to subdivision of reservoir water mixing exploitation.
The present invention for the technical scheme that the problem of the above-mentioned existence of solution adopts is:
Include oil pipe, oil pipe lower end arranges water adding packer, described water adding packer and watering oil-well pump, sealing intubate are linked in sequence from top to bottom, sealing intubate is connected in the lower contact of watering oil-well pump lower end and is plugged in sealing drum inside, in described sealing intubate, be provided with little oil pipe, little oil pipe is connected on the oil recovery pipe nipple of watering oil-well pump lower end, and sealing drum bottom connects hanging packer, hanging packer lower end be linked in sequence from top to bottom constant pressure switch device, Packer for blocking water and setting ball seat.
Press such scheme, described hanging packer is arranged on the oil well casing between plugged zone and producing zone, described Packer for blocking water is arranged on the oil well casing between producing zone and lower plugged zone, described water adding packer is arranged on the oil well casing on plugged zone, and the water mixing hole of described water adding packer is connected with the circular passage (top oil jacket annular space) between top oil pipe and oil well casing.
Press such scheme, described water adding packer is by top connection, upper overcoat, packing element assembly, middle overcoat, cone, lower overcoat, slips assembly, the bridge-type lower contact composition that is linked in sequence from top to bottom, in it, be installed on inner sleeve, lower contact is connected the upper and lower side of inner sleeve with bridge-type with top connection respectively, described inner sleeve periphery and the upper overcoat being linked in sequence from top to bottom, packing element assembly, middle overcoat, cone, between lower overcoat and slips assembly, be formed with the annular water mixing passage of up/down perforation, described upper overcoat is circumferentially provided with water mixing hole, water mixing hole is connected with annular water mixing passage.
Press such scheme, described watering oil-well pump includes the oil pumping pump housing and is sleeved on the external upper pump block of oil well pump and lower pump block, upper pump block upper end and box cupling join, and lower pump block lower end connects bridge-type joint, inside and outside the lower end of bridge-type joint, is connected respectively with oil recovery pipe nipple with lower contact; Between external week of described oil well pump and the box cupling being linked in sequence, upper pump block and lower pump block, be formed with the annular water mixing passage of up/down perforation from top to bottom, the lower annular water mixing passage that annular water mixing passage forms between bridge-type water mixing hole and oil recovery short circuit and lower contact under the pump of bridge-type joint is connected.
Press such scheme, in described bridge-type lower contact tube wall, be provided with bridge-type water mixing hole; In described bridge-type joint tube wall, be provided with bridge-type water mixing hole under pump.
Press such scheme, described water adding packer is connected with the box cupling of watering oil-well pump upper end by the bridge-type lower contact of lower end, make water adding packer and watering oil-well pump be linked into one, and the annular water mixing passage of water adding packer and the annular water mixing passage of watering oil-well pump are connected.
Press such scheme, described hanging packer is hydraulic setting slips support type packer; The mechanical switch that described constant pressure switch device is hydraulic pressure opening, described Packer for blocking water is that hydraulic setting is without combination wall and anchor packer.
Press such scheme, described setting ball seat is sleeve type backflow-preventing setting ball seat, comprise steel bushing and lower steel bushing, in upper steel bushing, top configures sliding sleeve fuse and locks by controlling pin, upper steel bushing below is along circumferentially offering liquid-through hole, the upper and lower two ends of described sliding sleeve fuse periphery are piston and upper steel bushing endoporus phase configuration, sliding sleeve fuse endoporus upper end arranges the conical surface, the lower end of upper steel bushing and lower steel bushing are connected and install valve seat, valve seat with install leather cup assembly phase configuration thereunder, the lower end of leather cup assembly arranges return spring.
Press such scheme, hanging packer, constant pressure switch device, Packer for blocking water and the setting ball seat of described sealing drum and lower company thereof thrown off with watering oil-well pump and water adding packer in the time going into the well, and now, sealing drum upper end is connected by back-off sub and oil pipe.
Beneficial effect of the present invention is: 1, annular water mixing passage is set in water adding packer and watering oil-well pump, has increased the area of passage of water mixing passage, strengthened the choke preventing function of tubing string, effectively reduce high salinity reservoirs was stratum production fluid concentration, avoided obstruction; 2, hanging packer, Packer for blocking water can effectively be isolated being communicated with between producing zone and upper and lower plugged zone, realize high salinity reservoirs was oil sheet is carried out to subdivision of reservoir water mixing exploitation, thereby solve known technology and can only exploit lower floor in the time producing, cannot realize producing zone and plugged zone are selected to the problem of exploiting.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of one embodiment of the invention.
Fig. 2 is the present invention and the back-off sub structural representation while being connected.
Fig. 3 is the structure chart of water adding packer in one embodiment of the invention.
Fig. 4 is the A-A sectional drawing in Fig. 3.
Fig. 5 is the structure chart of watering oil-well pump in one embodiment of the invention.
Fig. 6 is the B-B sectional drawing in Fig. 5.
Fig. 7 is the structure chart of setting ball seat in one embodiment of the invention.
Fig. 8 is the structure enlarged drawing of leather cup assembly part in Fig. 7.
Detailed description of the invention
Further illustrate the specific embodiment of the present invention below in conjunction with accompanying drawing.
Include oil pipe 5, oil pipe lower end arranges water adding packer 8, described water adding packer and watering oil-well pump 10, sealing intubate 11 are linked in sequence from top to bottom, sealing intubate is connected in the lower contact 37 of watering oil-well pump, in sealing intubate, be provided with little oil pipe 12, little oil pipe is connected in the oil recovery short circuit 38 of watering oil-well pump.
Described water adding packer 8 is as Fig. 3, shown in 4, by top connection 19, upper overcoat 20, packing element assembly 22, middle overcoat 23, cone 24, lower overcoat 26, slips assembly 27, bridge-type lower contact 28 composition that is linked in sequence from top to bottom, in it, be installed on inner sleeve 25, lower contact is connected the upper and lower side of inner sleeve with bridge-type with top connection respectively, described inner sleeve periphery and the upper overcoat being linked in sequence from top to bottom, packing element assembly, middle overcoat, cone, between lower overcoat and slips assembly, be formed with the annular water mixing passage 9 of up/down perforation, in described bridge-type lower contact 28 tube walls, be provided with bridge-type water mixing hole 29, bridge-type water mixing hole and annular water mixing passage connect, described upper overcoat is circumferentially provided with the water mixing hole 7 of the upper outside casing wall of radial penetration, water mixing hole is connected with annular water mixing passage, the inner, water mixing hole is installed on filter screen 21, and annular water mixing passage is connected with the top oil jacket annular space 6 between oil pipe 5 and oil well casing 1 by water mixing hole through filter screen.Described water adding packer is arranged on the oil well casing on plugged zone, and water adding packer 8 relies on oil pipe 5 weight compression packing element assemblies 22 and makes its distortion expansion realize packing oil jacket annular space.
Described watering oil-well pump 10 as shown in Figure 5,6, include the oil pumping pump housing 30 and be sleeved on the external upper pump block 32 of oil well pump and lower pump block 33, upper pump block upper end and box cupling 31 join, lower pump block 33 lower ends connect bridge-type joint 36, in bridge-type joint tube wall, be provided with bridge-type water mixing hole 35 under pump, inside and outside the lower end of bridge-type joint, be connected with lower contact 37 with oil recovery short circuit 38 respectively; Between external week of described oil well pump and the box cupling being linked in sequence, upper pump block and lower pump block, be formed with the annular water mixing passage 34 of up/down perforation from top to bottom, annular water mixing passage under the pump of bridge-type joint between bridge-type water mixing hole 35 and oil recovery short circuit 38 and lower contact 37 the lower annular water mixing passage of formation be connected.Water adding packer is connected by the bridge-type lower contact 28 of lower end and the box cupling 31 of watering oil-well pump upper end, make water adding packer and watering oil-well pump be linked into one, and the annular water mixing passage 9 of water adding packer is connected with bridge-type water mixing hole 35 under the pump of watering oil-well pump, inner sleeve 25 inner chambers of water adding packer and the oil pumping pump housing 30 intracavity inter-connections of watering oil-well pump.The sealing intubate 11 that watering oil-well pump connects by its lower end and little oil pipe 12 plug with sealing drum 13 tops.
Sealing drum bottom connects hanging packer 14, and described hanging packer is hydraulic setting slips support type packer; Hanging packer lower end be linked in sequence from top to bottom constant pressure switch device 15, Packer for blocking water 16 and setting ball seat 17; The mechanical switch that described constant pressure switch device is hydraulic pressure opening, described Packer for blocking water is that hydraulic setting is without combination wall and anchor packer, described hanging packer is arranged on the oil well casing 1 between plugged zone 2 and producing zone 3, and described Packer for blocking water is arranged on the oil well casing between producing zone and lower plugged zone 4.
Described setting ball seat 17 is sleeve type backflow-preventing setting ball seat, as Fig. 7, shown in 8, comprise steel bushing 39 and lower steel bushing 45, the interior top configuration of upper steel bushing 39 sliding sleeve fuse 40 also locks by controlling pin 42, upper steel bushing below is along circumferentially offering liquid-through hole 43, the upper and lower two ends of described sliding sleeve fuse periphery are piston 41 and upper steel bushing endoporus phase configuration, sliding sleeve fuse endoporus upper end arranges the conical surface and steel ball 49 phase configuration, the lower end of upper steel bushing and lower steel bushing are connected and install valve seat 44, valve seat with install leather cup assembly 46 phase configuration thereunder, the lower end of leather cup assembly arranges return spring 48.Described liquid-through hole is oval hole, circumferentially offers 2～8 along upper steel bushing, and the axial length in oval hole is less than or equal to the axial spacing of the upper and lower two ends of sliding sleeve fuse piston.Described leather cup assembly bottom is provided with supporting positive cover 47, and at supporting positive cover overcoat dress return spring, described return spring is installed in lower steel bushing inner chamber.Described leather cup assembly is made up of spool 50, leather cup 51, leather cup seat 52, back-up ring 53, nut 54, and described leather cup 51, leather cup seat 52, back-up ring 53 orders are set on spool, and regulate fixing by nut 54.Setting ball seat is the mechanical switch that hydraulic pressure is closed, and sets to do in the time that tubing string is gone into the well, to keep normally open, in the time of packer setting, can automatically close, and its upper and lower liquid cannot be passed through.
Described water adding packer 8 relies on the annular water mixing passage 9 of water adding packer and the bridge-type water mixing hole 29 of bridge-type lower contact to realize the annular water mixing passage that clear water is incorporated into watering oil-well pump 10 while work; Watering oil-well pump relies on the annular water mixing passage 35 between the oil pumping pump housing 31 and box cupling 32, upper pump block 33 and lower pump block 34 to carry out water mixing, the clear water that mixes bridge-type water mixing hole 35 under the pump of bridge-type joint arrive under pump and mix with stratum Produced Liquid.
The course of work of the present invention is: first according to the actual (real) thickness of producing zone 3, set hanging packer 14, spacing between constant pressure switch device 15 and Packer for blocking water 16, and be connected by back-off sub 18 and oil pipe 5 by sealing drum that Fig. 3 is shown in 13 upper ends, described instrument is lowered to desired location in oil well casing, drop into steel ball to setting ball seat 17, and improve in oil pipe hydraulic coupling and hanging packer 14 and Packer for blocking water 16 are completed set, complete simultaneously and close setting ball seat 17, in continuation raising oil pipe, hydraulic coupling completes and opens constant pressure switch device 15, drop into again steel ball to back-off sub 18, and improve hydraulic coupling in oil pipe, make oil pipe 5 realize and departing from sealing drum 13, and take out oil pipe 5.Complete after above-mentioned action, oil pipe and water adding packer 8, watering oil-well pump 10, sealing intubate 11 and little oil pipe 12 are linked in sequence successively, and be lowered to desired location in oil well casing, until sealing intubate 11 is inserted in the sealing drum 13 connecing on hanging packer 14, on carry after water adding packer 8 certain distances, the suitable ballast of rotating down pressing water adding packer sets it.When production, the clear water adding from top oil jacket annular space 6 by the water mixing hole 7 on water adding packer, through water adding packer and watering oil-well pump 10 annular water mixing passage, sealing intubate 11 and little oil pipe 12 between lower annular water mixing passage arrive constant pressure switch device 15, mix with producing zone 3 fluids, reach the object that reduces producing zone fluid concentration.
Claims (7)
1. a fine-separate layer water-mixed oil production tubing string, it is characterized in that including oil pipe, oil pipe lower end arranges water adding packer, described water adding packer and watering oil-well pump, sealing intubate are linked in sequence from top to bottom, sealing intubate is connected in the lower contact of watering oil-well pump lower end and is plugged in sealing drum inside, in described sealing intubate, be provided with little oil pipe, little oil pipe is connected on the oil recovery pipe nipple of watering oil-well pump lower end, sealing drum bottom connects hanging packer, hanging packer lower end be linked in sequence from top to bottom constant pressure switch device, Packer for blocking water and setting ball seat; Described hanging packer is arranged on the oil well casing between plugged zone and producing zone, described Packer for blocking water is arranged on the oil well casing between producing zone and lower plugged zone, described water adding packer is arranged on the oil well casing on plugged zone, and the water mixing hole of described water adding packer is connected with the circular passage between top oil pipe and oil well casing; Described watering oil-well pump includes the oil pumping pump housing and is sleeved on the external upper pump block of oil well pump and lower pump block, and upper pump block upper end and box cupling join, and lower pump block lower end connects bridge-type joint, inside and outside the lower end of bridge-type joint, is connected respectively with oil recovery pipe nipple with lower contact; Between external week of described oil well pump and the box cupling being linked in sequence, upper pump block and lower pump block, be formed with the annular water mixing passage of up/down perforation from top to bottom, the lower annular water mixing passage that annular water mixing passage forms between bridge-type water mixing hole and oil recovery short circuit and lower contact under the pump of bridge-type joint is connected.
2. by fine-separate layer water-mixed oil production tubing string claimed in claim 1, it is characterized in that described water adding packer is by top connection, upper overcoat, packing element assembly, middle overcoat, cone, lower overcoat, slips assembly, the bridge-type lower contact composition that is linked in sequence from top to bottom, in it, be installed on inner sleeve, lower contact is connected the upper and lower side of inner sleeve with bridge-type with top connection respectively, described inner sleeve periphery and the upper overcoat being linked in sequence from top to bottom, packing element assembly, middle overcoat, cone, between lower overcoat and slips assembly, be formed with the annular water mixing passage of up/down perforation, described upper overcoat is circumferentially provided with water mixing hole, water mixing hole is connected with annular water mixing passage, in described bridge-type lower contact tube wall, be provided with bridge-type water mixing hole.
3. by fine-separate layer water-mixed oil production tubing string claimed in claim 1, it is characterized in that being provided with bridge-type water mixing hole under pump in described bridge-type joint tube wall.
4. by fine-separate layer water-mixed oil production tubing string claimed in claim 1, it is characterized in that described water adding packer is connected with the box cupling of watering oil-well pump upper end by the bridge-type lower contact of lower end, make water adding packer and watering oil-well pump be linked into one, and the annular water mixing passage of water adding packer and the annular water mixing passage of watering oil-well pump are connected.
5. by fine-separate layer water-mixed oil production tubing string claimed in claim 1, it is characterized in that described hanging packer is hydraulic setting slips support type packer; The mechanical switch that described constant pressure switch device is hydraulic pressure opening, described Packer for blocking water is that hydraulic setting is without combination wall and anchor packer.
6. by fine-separate layer water-mixed oil production tubing string claimed in claim 5, it is characterized in that described setting ball seat comprises steel bushing and lower steel bushing, in upper steel bushing, top configures sliding sleeve fuse and locks by controlling pin, upper steel bushing below is along circumferentially offering liquid-through hole, the upper and lower two ends of described sliding sleeve fuse periphery are piston and upper steel bushing endoporus phase configuration, sliding sleeve fuse endoporus upper end arranges the conical surface, the lower end of upper steel bushing and lower steel bushing are connected and install valve seat, valve seat with install leather cup assembly phase configuration thereunder, the lower end of leather cup assembly arranges return spring.
7. by fine-separate layer water-mixed oil production tubing string claimed in claim 1, the hanging packer, constant pressure switch device, Packer for blocking water and the setting ball seat that it is characterized in that described sealing drum and the second line of a couplet thereof are thrown off with watering oil-well pump and water adding packer in the time that lower oil well casing is installed, now, sealing drum upper end is connected by back-off sub and oil pipe.
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| CN201110255446.5A CN102278101B (en) | 2011-08-31 | 2011-08-31 | Subdivided layer watered oil extraction pipe column |
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| CN201110255446.5A CN102278101B (en) | 2011-08-31 | 2011-08-31 | Subdivided layer watered oil extraction pipe column |
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| CN102278101B true CN102278101B (en) | 2014-07-23 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278101B (en) * | 2011-08-31 | 2014-07-23 | 中国石油化工股份有限公司 | Subdivided layer watered oil extraction pipe column |
| CN103696744B (en) * | 2012-09-27 | 2016-09-28 | 大港油田集团有限责任公司 | Three stage layered commingled columns |
| CN104514530A (en) * | 2013-09-27 | 2015-04-15 | 中国石油天然气股份有限公司 | Bridge separate recovery machine applicable to multi-layer mining |
| CN109267978B (en) * | 2018-09-07 | 2022-03-22 | 中国石油化工股份有限公司 | Separate injection pipe column |
| CN110700785B (en) * | 2019-10-29 | 2022-01-14 | 中国石油化工股份有限公司 | Sedimentation and floating composite leaking stoppage repairing method for damaged casing |
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