CN109707327A - A concentric double-pipe distribution pipe string for pressurized operation - Google Patents

A concentric double-pipe distribution pipe string for pressurized operation Download PDF

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Publication number
CN109707327A
CN109707327A CN201910054165.XA CN201910054165A CN109707327A CN 109707327 A CN109707327 A CN 109707327A CN 201910054165 A CN201910054165 A CN 201910054165A CN 109707327 A CN109707327 A CN 109707327A
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section
oil pipe
pipe
water injection
tubing
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CN201910054165.XA
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Chinese (zh)
Inventor
申晓莉
薛建强
王守虎
王俊涛
何汝贤
陈立海
王薇
王晓娥
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Petrochina Co Ltd
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Petrochina Co Ltd
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Abstract

The invention discloses a concentric double-tube separate injection under-pressure operation tubular column, a first section 31/2"tubing, first Water injection packer, second section 31/2"tubing, constant pressure injection distributor, third section 31/2"tubing, second Water injection packer and fourth section 31/2"the oil pipes are connected in sequence from top to bottom, and the first section 31/2The upper end of the oil pipe is connected with the wellhead, the lower end of the 1.9 ' glass fiber reinforced plastic oil pipe is connected with the 1.9 ' insertion pipe, the 1.9 ' preset working barrel and the short section of the glass fiber reinforced plastic oil pipe are positioned at the first section 31/2In the oil pipe, the upper end of the 1.9 glass fiber reinforced plastic oil pipe passes through the fourth section 3 in sequence1/2"tubing, second Water injection packer, third section 31/2"tubing, constant pressure injection distributor, second section 31/2"tubing, first Water injection packer inserted in first section 31/2The middle and the back of the oil pipe are connected with the lower end of a 1.9 preset working barrel, and the pipe column can meet the requirements of a concentric double-pipe separate injection pressurized operation process with pressurized outer pipe and pressurized inner pipe.

Description

A kind of concentric double pipe dispensing Operating Pressure tubing string
Technical field
The invention belongs to oil-field flooding fields, are related to a kind of concentric double pipe dispensing Operating Pressure tubing string.
Background technique
With deepening continuously for oil field development, stratum energy all declines quickly between different oil reservoirs and there are great differences, It seriously affects oil field and continues Efficient Development.Carrying out water filling supplement stratum energy to different oil reservoirs is the effective hand for improving recovery ratio Section, existing frequently-used zonal injection technology mainly has the techniques such as water injection through tubing and casing, bridge-type eccentric dispensing, bridge-type concentric separated-injection, with oil field The iterative method of fine-grained management, the more or less presence survey of existing zonal injection technology adjust the rate height that is hampered, survey and adjust period length, allotment The problems such as precision is low.In order to solve high angle hole, deep-well, produced-water reinjection well seperated layer water injection test allotment problem, carry out concentric Two-tube dispensing technical research respectively fills the water dually completed injector by two casing column combination of size, and downhole instrument is surveyed and is adjusted It is changed to ground flow automatic gauge and control, reducing the later period is measured and tuned into this, improves single layer dispensing qualification rate.Due to hyposmosis Oil-field flooding is more difficult, replace water injection string generally not pressure release, it is desirable that Operating Pressure, at present oil field concentric double pipe dispense work Skill is unsatisfactory for Operating Pressure requirement, therefore, dispenses and requires in conjunction with low permeability oil field concentric double pipe, propose it is a kind of " outer tube is with pressure, The concentric double pipe dispensing Operating Pressure technique and tubing string of inner tube normal pressure ".
Summary of the invention
It is an object of the invention to overcome the above-mentioned prior art, a kind of concentric double pipe dispensing Operating Pressure is provided Tubing string, the tubing string can satisfy the requirement of outer tube concentric double pipe dispensing Operating Pressure technique with pressure, inner tube normal pressure.
In order to achieve the above objectives, concentric double pipe of the present invention dispensing Operating Pressure tubing string includes 1.9 " glass reinforced plastic oil " preset seating nipple, glass fiber reinforced plastic oil pipe pipe nipple, the second water injection packer, level pressure distributor, is inserted the first water injection packer for pipe, 1.9 Seal of tube distributor, 1.9 " intubation and four section 31/2 " oil pipes；
First segment 31/2 " oil pipe, the first water injection packer, second segment 31/2 " oil pipe, level pressure distributor, third section 31/2 " " oil pipe is sequentially connected from top to bottom, and " the upper end of oil pipe of first segment 31/2 for oil pipe, the second water injection packer and the 4th section 31/2 It is connected with well head, 1.9 " lower ends of glass fiber reinforced plastic oil pipe and 1.9 " intubation is connected, 1.9 " preset seating nipple and glass fiber reinforced plastic oil pipes Short section is located at first segment 31/2 " in oil pipe, 1.9 " upper end of glass fiber reinforced plastic oil pipe sequentially passes through the 4th section 31/2 " oil pipes, the second note Water packer, third section 31/2 " oil pipe, level pressure distributor, second segment 31/2 " oil pipe, the first water injection packer are inserted in first The lower end of the preset seating nipple of section 31/2 " in oil pipe after with 1.9 " is connected, and 1.9 " it is oily that the upper end of preset seating nipple passes through glass reinforced plastic Pipe pipe nipple is connected with well head.
First water injection packer and the second water injection packer are Y341-114 type water injection packer.
The lower thread connected pipes pipe nipple and silk plug of intubation sealing distributor.
First segment 31/2 " oil pipe, the first water injection packer, second segment 31/2 " oil pipe, level pressure distributor, third section 31/2 " Oil pipe, the second water injection packer and the 4th section 31/2 " are connected through a screw thread between oil pipe.
It is connected through a screw thread between the intubation of 1.9 " lower end of glass fiber reinforced plastic oil pipe and 1.9 "；
It is connected through a screw thread between 1.9 " glass fiber reinforced plastic oil pipe and 1.9 " preset seating nipples；
1.9 " it is connected through a screw thread between preset seating nipple and glass fiber reinforced plastic oil pipe pipe nipple.
The internal diameter of first water injection packer and the second water injection packer is 62mm.
The invention has the following advantages:
Concentric double pipe of the present invention dispensing Operating Pressure tubing string is when specific operation, using the structure shape of concentric double pipe Formula, outer tube is with pressure, the dispensing Operating Pressure technique requirement of concentric double pipe of inner tube normal pressure to meet, and realizes the ground of two layers of dispensing flow Face, which is surveyed, to be adjusted and controls, and water injection rate is round-the-clock up to standard；Using 1.9 simultaneously, " glass fiber reinforced plastic oil pipe is to improve the corrosion resistance of tubing string, effectively Extend the service life of tubing string.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1 be 31/2 " oil pipe, 2 are 1.9 " glass fiber reinforced plastic oil pipe, 3 being 1.9, " preset seating nipple, 4 are the first water filling packing Device, 5 be level pressure distributor, 6 be the second water injection packer, 7 be intubation sealing distributor, " the intubation that 8 is 1.9.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, concentric double pipe dispensing Operating Pressure tubing string of the present invention includes 1.9 " glass fiber reinforced plastic oil pipes 2,1.9 " Preset seating nipple 3, the first water injection packer 4, glass fiber reinforced plastic oil pipe pipe nipple, the second water injection packer 6, level pressure distributor 5, intubation are close Seal distributor 7,1.9 " intubation 8 and four section 31/2 " oil pipe 1；First segment 31/2 " oil pipe 1, the first water injection packer 4, second segment " oil pipe 1 is from upper for 31/2 " oil pipe 1, level pressure distributor 5, third section 31/2 " oil pipe 1, the second water injection packer 6 and the 4th section 31/2 It is sequentially connected, and first segment 31/2 that " upper end of oil pipe 1 is connected with well head, 1.9 " lower ends of glass fiber reinforced plastic oil pipe 2 and 1.9 " under Intubation 8 is connected, in 1.9 " preset seating nipple 3 and glass fiber reinforced plastic oil pipe short section are located at first segment 31/2 " oil pipes 1,1.9 " glass reinforced plastics The upper end of oil pipe 2 sequentially passes through the 4th section of 31/2 " oil pipe 1, the second water injection packer 6, third section 31/2 " oil pipe 1, level pressure injection allocation Rear and 1.9 " preset work in device 5, second segment 31/2 " oil pipe 1, the first water injection packer 4 are inserted in first segment 31/2 " oil pipe 1 The lower end of cylinder 3 is connected, and 1.9 " upper end of preset seating nipple 3 is connected by glass fiber reinforced plastic oil pipe pipe nipple with well head.
First water injection packer 4 and the second water injection packer 6 are Y341-114 type water injection packer, the first water filling packing The internal diameter of device 4 and the second water injection packer 6 is 62mm；The lower thread connected pipes pipe nipple and silk plug of intubation sealing distributor 7.
First segment 31/2 " oil pipe 1, the first water injection packer 4, second segment 31/2 " oil pipe 1, level pressure distributor 5, third section It is connected through a screw thread between 31/2 " oil pipe 1, the second water injection packer 6 and the 4th section 31/2 " oil pipe 1；1.9 " glass fiber reinforced plastic oil pipes 2 lower end and 1.9 " is connected through a screw thread between intubation 8；Pass through spiral shell between 1.9 " glass fiber reinforced plastic oil pipe 2 and 1.9 " preset seating nipples 3 Line connection；1.9 " it is connected through a screw thread between preset seating nipple 3 and glass fiber reinforced plastic oil pipe pipe nipple.
Tripping in 31/2 with pressure " oil pipe 1: intubation sealing 7 lower thread connected pipes pipe nipple of distributor and silk plug is intubated close The threaded upper ends connection of envelope 7 threaded upper ends of distributor " lower end of oil pipe 1, the 4th section 31/2 " oil pipe 1 that connects the 4th section 3,1/2 the The threaded upper ends of the lower end of two water injection packers 6, the second water injection packer 6 connect third section 31/2 " lower end of oil pipe 1, third Section 31/2 " threaded upper ends of oil pipe 1 connect 5 lower end of level pressure distributor, and 5 threaded upper ends of level pressure distributor connect second segment 31/2 " " threaded upper ends of oil pipe 1 connect the lower end of the first water injection packer 4, the first water filling packing for the lower end of oil pipe 1, second segment 31/2 The threaded upper ends of device 4 connect the 4th section 31/2, and " oil pipe 1, " oil pipe 1 is connected to well head to first segment 31/2.It is fixed during tripping in It presses distributor 5 and intubation sealing 7 flow channels of distributor to close, is not connected to inside and outside oil pipe, using Operating Pressure equipment lower going-into-well Cylinder predetermined position.
Normal pressure tripping in 1.9 " glass reinforced plastic tubing string: by 1.9 " is intubated 8 threaded upper ends connection, 1.9 " 2,1.9 " glass of glass fiber reinforced plastic oil pipe Glass steel oil pipe 2 is connected to 1.9, and " " upper end of preset seating nipple 3 connects through glass fiber reinforced plastic oil pipe pipe nipple for the lower end of preset seating nipple 3,1.9 Interior " not being connected to inside and outside oil pipe 1, each 31/2 " oil pipe 1 that well head is connected to, due to each 31/2 is hydrostatic column, so meeting normal pressure tripping in.
Packer setting and open note: will be suppressed in the annular space between 31/2 " oil pipe 1 and 1.9 " glass fiber reinforced plastic oil pipe 2 to When 1 external differential of 20MPa, when with 31/2 " oil pipe reaches 5MPa, the first water injection packer 4 and the second water injection packer 6 complete seat Envelope；22~23MPa is boosted to again, " when the external differential of oil pipe 1 reaches 8MPa, is opened level pressure distributor 5 when with 31/2, is opened Upper layer waterflood path, 1.9 " glass fiber reinforced plastic oil pipe 2 is suppressed to 20-22MPa, with 1.9 " glass fiber reinforced plastic oil pipe, 2 outer annular space (general 15MPa) Pressure difference when reaching 8MPa, destroy the temporary stifled valve piston in intubation sealing distributor 7, opening lower layer's waterflood path, using ground Each layer daily water-injection rate of automatic control valve regulation realizes two layers of dispensing.
" 1 outer oil jacket annulus injection of oil pipe, by the first water injection packer 4 and the second water filling that anti-flushing well: flushing fluid is from 31/2 6 backwash channel of packer, using intubation sealing 7 flow channels of distributor into 1.9 " in glass fiber reinforced plastic oil pipe 2, most afterwards through 1.9 " glass Glass steel oil pipe 2 returns out to ground.
Normal pressure plays 1.9, and " glass fiber reinforced plastic oil pipe 2: level pressure distributor 5 is automatically closed when stopping note, from 1.9, and " glass fiber reinforced plastic oil pipe 2 is put into Blanking plug seat enters 1.9, and " preset seating nipple 3, which blocks stratum back-pressure 1.9, " under preset seating nipple 3, to be unloaded well head, installs Operating Pressure equipment, by 1.9 " glass fiber reinforced plastic oil pipe 2 above mentions 1m, makes 1.9 " is intubated 8 front ends and seal assembly is driven to move up, and closes intubation The flow channels for sealing distributor 7, it is liquid column hydrostatic pressure in oil pipe 1 " outside oil pipe 1,31/2 " 31/2 that strata pressure, which is obstructed, Intubation 8 that normal pressure successively plays out 1.9 " tubing nipple, 1.9 " preset seating nipple 3,1.9 " glass fiber reinforced plastic oil pipes 2 and 1.9 ".
With pressure 31/2 " Guan Guanzhu: above mentioning 31/2 " oil pipe 1 unseals the first water injection packer 4 and the second water injection packer 6, " oil pipe 1, the first water injection packer 4, level pressure distributor 5, the second water injection packer 6 and intubation sealing with pressure successively to play out 31/2 Distributor 7 completes lift pipe string operation with pressure.

Claims (6)

1.一种同心双管分注带压作业管柱，其特征在于，包括1.9″玻璃钢油管(2)、1.9″预置工作筒(3)、第一注水封隔器(4)、玻璃钢油管短节、第二注水封隔器(6)、定压配注器(5)、插管密封配注器(7)、1.9″插管(8)及四段31/2″油管(1)；1. A concentric double-pipe distribution injection pipe string under pressure, characterized in that it comprises a 1.9″ glass fiber reinforced plastic oil pipe (2), a 1.9″ preset working cylinder (3), a first water injection packer (4), a glass fiber reinforced plastic oil pipe Pup joint, second water injection packer (6), constant pressure dispenser (5), cannula seal dispenser (7), 1.9″ cannula (8) and four sections of 3 1/2 ″ tubing (1 ); 第一段31/2″油管(1)、第一注水封隔器(4)、第二段31/2″油管(1)、定压配注器(5)、第三段31/2″油管(1)、第二注水封隔器(6)及第四段31/2″油管(1)自上到下依次连接，且第一段31/2″油管(1)的上端与井口相连接，1.9″玻璃钢油管(2)的下端与1.9″插管(8)相连接，1.9″预置工作筒(3)及玻璃钢油管短段位于第一段31/2″油管(1)内，1.9″玻璃钢油管(2)的上端依次穿过第四段31/2″油管(1)、第二注水封隔器(6)、第三段31/2″油管(1)、定压配注器(5)、第二段31/2″油管(1)、第一注水封隔器(4)插入于第一段31/2″油管(1)中后与1.9″预置工作筒(3)的下端相连接，1.9″预置工作筒(3)的上端通过玻璃钢油管短节与井口相连接。The first section of 3 1/2 ″ tubing (1), the first water injection packer (4), the second section of 3 1/2 ″ tubing (1), the constant pressure dispenser (5), the third section 3 1 / 2 ″ oil pipe (1), the second water injection packer (6) and the fourth section of 3 1 / 2 ″ oil pipe (1) are connected in sequence from top to bottom, and the first section of 3 1 / 2 ″ oil pipe (1) The upper end of the 1.9″ fiberglass tubing (2) is connected to the 1.9″ cannula (8), the 1.9″ preset mandrel (3) and the short section of the fiberglass tubing are located in the first section 3 1/2 ″ In the oil pipe (1), the upper end of the 1.9″ fiberglass oil pipe (2) passes through the fourth section of 3 1/2 ″ oil pipe (1), the second water injection packer (6), and the third section of 3 1/2 ″ oil pipe in sequence (1), constant pressure dispenser (5), second section of 3 1/2 ″ oil pipe (1), first water injection packer (4) inserted into the first section of 3 1 / 2 ″ oil pipe (1) Afterwards, it is connected with the lower end of the 1.9" preset working cylinder (3), and the upper end of the 1.9" preset working cylinder (3) is connected with the wellhead through a short joint of FRP tubing. 2.根据权利要求1所述的同心双管分注带压作业管柱，其特征在于，第一注水封隔器(4)及第二注水封隔器(6)均为Y341-114型注水封隔器。2. The concentric double-pipe split injection pipe string according to claim 1, wherein the first water injection packer (4) and the second water injection packer (6) are both Y341-114 type water injection Packer. 3.根据权利要求1所述的同心双管分注带压作业管柱，其特征在于，插管密封配注器(7)的下端螺纹连接油管短节及丝堵。3 . The concentric double-pipe dispensing and pressurized working pipe string according to claim 1 , wherein the lower end of the cannula sealing dispenser ( 7 ) is threadedly connected to an oil pipe short joint and a plug. 4 . 4.根据权利要求1所述的同心双管分注带压作业管柱，其特征在于，第一段31/2″油管(1)、第一注水封隔器(4)、第二段31/2″油管(1)、定压配注器(5)、第三段31/2″油管(1)、第二注水封隔器(6)及第四段31/2″油管(1)之间均通过螺纹连接。4. The concentric double-pipe split injection pipe string according to claim 1, characterized in that the first section of 3 1/2 ″ oil pipe (1), the first water injection packer (4), the second section 3 1/2 ″ tubing (1), constant pressure dispenser (5), third section 3 1/2 ″ tubing (1), second water injection packer (6) and fourth section 3 1/2 ″ The oil pipes (1) are all connected by threads. 5.根据权利要求1所述的同心双管分注带压作业管柱，其特征在于，1.9″玻璃钢油管(2)的下端与1.9″插管(8)之间通过螺纹连接；5. The concentric double-pipe dispensing pipe string under pressure according to claim 1, wherein the lower end of the 1.9" fiberglass oil pipe (2) and the 1.9" cannula (8) are connected by threads; 1.9″玻璃钢油管(2)与1.9″预置工作筒(3)之间通过螺纹连接；The 1.9″ fiberglass oil pipe (2) and the 1.9″ preset working cylinder (3) are connected by thread; 1.9″预置工作筒(3)与玻璃钢油管短节之间通过螺纹连接。The 1.9″ preset working cylinder (3) is connected with the short joint of the FRP oil pipe by means of threads. 6.根据权利要求1所述的同心双管分注带压作业管柱，其特征在于，第一注水封隔器(4)及第二注水封隔器(6)的内径为62mm。6 . The concentric double-pipe split injection pipe string according to claim 1 , wherein the inner diameter of the first water injection packer ( 4 ) and the second water injection packer ( 6 ) is 62 mm. 7 .
CN201910054165.XA 2019-01-21 2019-01-21 A concentric double-pipe distribution pipe string for pressurized operation Pending CN109707327A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110617041A (en) * 2019-10-09 2019-12-27 中国石油天然气股份有限公司 Water injection well water absorption profile adjusting sleeve and adjusting method
CN112434394A (en) * 2019-08-07 2021-03-02 中国石油天然气股份有限公司 Method and device for selecting size of polymer flooding concentric double-pipe injection oil pipe
CN112647912A (en) * 2020-12-29 2021-04-13 中国海洋石油集团有限公司 Chemical flooding multi-medium layered injection pipe column and installation method thereof

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CN209892121U (en) * 2019-01-21 2020-01-03 中国石油天然气股份有限公司 Concentric double-tube separate injection pressurized operation string

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112434394A (en) * 2019-08-07 2021-03-02 中国石油天然气股份有限公司 Method and device for selecting size of polymer flooding concentric double-pipe injection oil pipe
CN110617041A (en) * 2019-10-09 2019-12-27 中国石油天然气股份有限公司 Water injection well water absorption profile adjusting sleeve and adjusting method
CN112647912A (en) * 2020-12-29 2021-04-13 中国海洋石油集团有限公司 Chemical flooding multi-medium layered injection pipe column and installation method thereof
CN112647912B (en) * 2020-12-29 2022-09-13 中国海洋石油集团有限公司 Chemical flooding multi-medium layered injection pipe column and installation method thereof

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