CN108843287A - Two to seven layers are exempted from accurate testing dispenser and technique - Google Patents
Two to seven layers are exempted from accurate testing dispenser and technique Download PDFInfo
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- CN108843287A CN108843287A CN201810536333.4A CN201810536333A CN108843287A CN 108843287 A CN108843287 A CN 108843287A CN 201810536333 A CN201810536333 A CN 201810536333A CN 108843287 A CN108843287 A CN 108843287A
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- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 85
- 238000002347 injection Methods 0.000 claims abstract description 66
- 239000007924 injection Substances 0.000 claims abstract description 66
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000005516 engineering process Methods 0.000 claims abstract description 9
- 238000005192 partition Methods 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 29
- 239000000243 solution Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- -1 fixed disk Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000010181 polygamy Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/18—Pipes provided with plural fluid passages
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention belongs to oil-field flooding technology fields, more particularly to two to seven layers of one kind exempts from accurate testing dispenser and technique, including ground control unit and water injection string, the electromagnetic flowmeter and control valve for controlling injection flow are provided in ground control unit, the water outlet of the upper end connection ground control unit of water injection string, the lower end of water injection string leads to underground and fills the water layer respectively to achieve the purpose that water filling layer water filling, it is provided at least three in water injection string and crosses liquid channel, it is control channel that wherein one, which is crossed liquid channel, and it is waterflood path that remaining, which crosses liquid channel,.The present invention use ground zonal injection technology, on the ground can the water injection parameter to each implanted layer accurately adjusted, adjustment during do not have to progress test jobs, water filling cost is greatly saved compared with prior art.Meanwhile the mode of ground dispensing keeps waterflooding adjustment process of the invention more convenient flexibly, Adjustment precision is also more easier to guarantee.
Description
Technical field
The invention belongs to oil-field flooding technology fields, more particularly to two to seven layers of one kind to exempt from accurate testing dispenser
And technique.
Background technique
In oilfield production, into oil reservoir, water filling is to maintain formation pressure, realizes oil field stable high yield and improves oil field and opens
Send out the effective ways of effect.Since most of oil field is all heterogeneous multiple zone sandstone, each oil reservoir is in interlayer, plane and layer
There is very big otherness, these differences have a significant impact to water flooding recovery effect, and therefore, oil-field flooding mostly uses seperated layer water injection
Mode, adjusted by interlayer structure and realize further taping the latent power to poor thin layer and thick oil pay with structural adjustment in layer, improved and infuse
Water sweep efficiency.But existing stratified injection water technology distributes the water injection rate of each oil reservoir, the injecting process point using injection well downhole flow regulator
Adjust (i.e. underground adjusting water faucet) and two steps of water filling, water injection work complicated and time consumption, and operation and testing cost expensive to survey.Separately
Outside, existing water flooding regime needs tripping in test equipment, and the error of zonal testing is larger, can not accurately react strata pressure, and
And entirely test process is cumbersome, testing efficiency is low, and it is higher to fall card instrument accident rate.
Summary of the invention
The present invention provides a kind of two to seven layers and exempts from accurate testing dispenser and technique, to solve to mention in above-mentioned background technique
Out the problem of.
Technical problem solved by the invention is realized using following technical scheme：
A kind of two to seven layers are exempted from accurate testing dispenser, including ground control unit and water injection string, ground control dress
The electromagnetic flowmeter and control valve for controlling injection flow are provided in setting, the upper end of water injection string connects ground control unit
Water outlet, the lower end of water injection string leads to underground and fills the water layer respectively to achieve the purpose that set in water injection string to water filling layer water filling
It is equipped at least three and crosses liquid channel, wherein it is control channel that one, which is crossed liquid channel, it is waterflood path that remaining, which crosses liquid channel,.
As the first technical solution, the water injection string by multiple lengths be 9-10 meter integral tube head and the tail connect and
At the radical of integral tube determines on demand according to the depth of water filling layer position, and external screw thread, integral tube are provided on the outside of integral tube upper end
It is provided with annular groove on the outside of lower end, is provided with partition in integral tube, the tube wall of partition and integral tube is linked together, and described crosses liquid
Channel is separated by partition, and the connection structure of two adjacent integral tubes includes snap ring, box cupling and seal receptacle, the card
Ring is hingedly formed by two semi-rings, and the torsion for gathering the center of two and half circumferential snap rings is provided on the articulated shaft of two semi-rings
Spring, snap ring are clipped at the annular groove under the action of torsional spring and are stuck in annular groove, and the upper end of the box cupling is sleeved on one
The lower end of pipe, snap ring carry out limit to the upper end of box cupling to prevent box cupling from being fallen off by the lower end of integral tube, and the lower end of box cupling is logical
The upper end for being threaded in another integral tube is crossed, so that two integral tubes be linked together, the seal receptacle is clipped in two
Between root integral tube, the two sides up and down of seal receptacle are provided with the seal groove that can be accommodated in the inner the end of integral tube, seal groove
Slot bottom be provided with gasket, the edge on the upside of the seal receptacle is provided with spring detent, the outside of the integral tube lower end
It is provided with and is fixedly connected on the lower end of integral tube by the cooperation of spring detent and card slot with the matched card slot of spring detent, seal receptacle.
As second of technical solution, the water injection string includes at least three independent tubing strings, in every independent tubing string
To cross liquid channel described in one, the dispensing pipe head and the tail that every independent tubing string is 9-10 meters by multiple lengths are formed by connecting, point
The radical of note pipe determines on demand according to the depth of water filling layer position, and the pipe for connecting dispensing pipe is provided on the water injection string
Column joint, the structure of casing adapter include thread bush, top connection, upper fixed seat, lower contact and lower fixed seat, the upper end of top connection
By being inserted on upper fixed seat and can be freely rotated on the downside of upper fixed seat in plug-in opening, the lower end of lower contact is by lower fixed seat
Upside be inserted on lower fixed seat and can be freely rotated in plug-in opening, the lower end of top connection is inserted in the upper end of lower contact,
And the insertion mating surface of top connection and lower contact is sealing surface, the upper end cap of the thread bush the outside of upper fixed seat simultaneously
It cannot be moved down under the position-limiting action of upper fixed seat, the lower end of thread bush is connect by screw thread with lower fixed seat, thus will
Top connection and lower contact are fixed together, the two dispensings pipe point connected in same independent tubing string by the casing adapter
Be not welded in top connection and lower contact, to realize the connection of neighbouring two dispensings pipe, in casing adapter on connect
Head and lower contact are arranged in pairs, and the number of top connection or lower contact is identical as the quantity of independent tubing string.
It include an oil pipe column and at least two outer tubing strings in the water injection string as the third technical solution,
Each outer tube band of column is the control channel in the outside for being distributed in oil pipe column, oil pipe column, is described in outer tubing string
Waterflood path, every outer tubing string are formed by connecting by more outer tubes head and the tail, the length of every outer tube with form the every of oil pipe column
The length of root oil pipe is identical, and each outer tube in the outer tubing string is connected by union.
As the further technical solution of the third technical solution, fixed disk, oil pipe are set on the oil pipe column
Locating piece is fixedly installed on tubing string and outer tubing string, wherein the locating piece on oil pipe column is against the upside of fixed disk, outer tube
Locating piece on column is against the downside of fixed disk.
A kind of two to seven layers are exempted from accurate testing zonal injection technology, are included the following steps：
Step 1, packer, the corresponding packer of each waterflood path, packer are taken according to the quantity of waterflood path
Using Y341 type packer；
Step 2, the central tube of packer is removed, and the integral tube using center with partition is replaced, and before replacement, is needed
Processed on the outside of integral tube with the former identical structure of central tube external structure, so that the integral tube of replacement can be smooth
It is mounted on former packer, the liquid pass hole for packer setting is provided only on the tube wall of the integral tube of replacement, cross liquid
Hole is located on the corresponding tube wall of control channel；
Step 3, tampered packer is connected on water injection string, and in lower going-into-well, the position of each packer is equal
More than corresponding layer position；
Step 4, connect a set of ground control unit in the upper end of each waterflood path respectively, for pair
The injection flow and injection length of each layer of position are controlled；
Step 5, high pressure pump truck is connected in the side of the control channel, for providing liquid required for packer setting
Pressure；
Step 6, high pressure pump truck is opened, high pressure water reaches packers at different levels via control channel, makes packer setting, set
Packer afterwards blocks corresponding water filling layer position from upside；
Step 7, each ground control unit is adjusted according to injection project, makes to inject flow and injection length meets the requirements, it is complete
At accurate seperated layer water injection.
Beneficial effects of the present invention are：
1, the present invention use ground zonal injection technology, on the ground can the water injection parameter to each implanted layer accurately adjusted
It is whole, do not have to carry out test jobs during adjustment, water filling cost is greatly saved compared with prior art.Meanwhile ground dispenses
Mode make waterflooding adjustment process of the invention it is more convenient flexibly, Adjustment precision is also more easier to guarantee.
2, integral tube of the present invention using center with partition has construction technology simple, difficulty of construction as water injection pipe
Small advantage.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of the embodiment of the present invention one；
Fig. 2 is the sectional view in Fig. 1 at A；
Fig. 3 is the structural schematic diagram of snap ring；
Fig. 4 is the schematic diagram of the section structure of seal receptacle；
Fig. 5 is the structural schematic diagram of the embodiment of the present invention two；
Fig. 6 is the structural schematic diagram of the embodiment of the present invention three；
Fig. 7 is the structural schematic diagram of the ground control unit；
Fig. 8-Figure 11 is other four kinds of possible structures of the casing adapter.
In figure：1- integral tube, 2- box cupling, 3- seal receptacle, 4- snap ring, 5- partition, 6- cross liquid channel, 7- semi-ring, 8- torsional spring,
9- gasket, 10- seal groove, 11- spring detent, 12- dispensing are managed, 13- lower contact, 14- lower fixed seat, 15- thread bush, on 16-
Fixing seat, 17- top connection, 18- outer tube, 19- fixed disk, 20- locating piece, 21- union, 22- control valve, 23- Electromagnetic Flow
Meter, 24- card slot, 25- oil pipe column.
Specific embodiment
The present invention is described further below in conjunction with attached drawing：
Embodiment one：
Exempt from accurate testing dispenser, including ground control unit and water injection pipe for two to seven layers of one kind described in the present embodiment
Column, is provided with electromagnetic flowmeter 23 and control valve 22 for controlling injection flow in ground control unit, water injection string it is upper
The water outlet of end connection ground control unit, the lower end of water injection string lead to underground and fill the water layer respectively to reach to water filling layer water filling
Purpose is provided at least three in water injection string and crosses liquid channels 6, wherein it is control channel that one, which is crossed liquid channel, it is logical that remaining crosses liquid
Road is waterflood path.
The present invention use ground zonal injection technology, on the ground can the water injection parameter to each implanted layer accurately adjusted
It is whole, do not have to carry out test jobs during adjustment, water filling cost is greatly saved compared with prior art.Meanwhile ground dispenses
Mode make waterflooding adjustment process of the invention it is more convenient flexibly, Adjustment precision is also more easier to guarantee.
It should be noted that the basic structure of the ground control unit is electromagnetic flowmeter 23 and control valve 22, incite somebody to action
Electromagnetic flowmeter 23 and control valve 22, which are connected on pipeline, can constitute ground control unit, this belongs to the field technical staff
The conventional technical means used, is not belonging to the protection scope of the application, thus the application only to the structure of ground control unit into
The description of principle is gone, attached drawing 7 is also only schematic diagram.
The structure of water injection string is as follows：
The water injection string is formed by connecting by 1 head and the tail of integral tube that multiple lengths are 9-10 meters, the radical root of integral tube 1
It is determined on demand according to the depth of water filling layer position.9-10 meters be oil pipe in wellsite operation general length, integral tube 1 is designed to and is made
Industry oil pipe is isometric, and integral tube 1 can be made to match with existing operating equipment, to reduce new equipment investment, reduces construction cost.
Partition 5 is provided in integral tube 1, partition 5 and the tube wall of integral tube 1 are linked together, it is described cross liquid channel 6 by
Partition 5 is separated.It is a big innovation of the invention using the water injection string that the integral tube 1 with partition 5 forms.Integral tube
Advantage essentially consists in the following aspects：
1, this integral tube 1 can be manufactured directly by way of pultrusion, and manufacturing process is simple, manufacturing cost
It is low.
2, the outer wall of integral tube 1 and partition 5 are an integral molding structure, therefore structural strength is very high, are guaranteed in liquid channel 6
It can bear very high pressure.
3, integral tube 1 integrates multiple liquid channels 6 of crossing, and greatly reduces the quantity of pipe fitting to be connected, not only
Material production, transport and management difficulty are reduced, and largely reduces the operating procedure of pipeline connection, so as to shorten operation
Time improves operating efficiency, has saved operating cost.
When two adjacent integral tubes 1 connect, main there are two technical requirements, first is that connection speed is enough when wellsite applications
Fastly, to guarantee construction efficiency, second is that guaranteeing that each liquid channel 6 of crossing is mutually indepedent in junction, each cross between liquid channel will not be gone here and there
Water.In the present embodiment, external screw thread is provided on the outside of 1 upper end of integral tube, integral tube is provided with annular groove, phase on the outside of 1 lower end
The connection structure of two adjacent integral tubes 1 includes snap ring 4, box cupling 2 and seal receptacle 3, and the snap ring 4 is hinged by two semi-rings 7
It forms, the upper end of the box cupling 2 is sleeved on the lower end of integral tube 1, and snap ring 4 limit preventing to the upper end of box cupling 2
Box cupling 2 is fallen off by the lower end of integral tube 1, and the lower end of box cupling 2 is threadedly attached in the upper end of another integral tube 1, thus will
Two integral tubes 1 link together, and the seal receptacle 3 is clipped between two integral tubes 1, and the two sides up and down of seal receptacle 3 are all provided with
It is equipped with the seal groove 10 that the end of integral tube 1 can be accommodated in the inner, the slot bottom of seal groove 10 is provided with gasket 9, and described is close
The edge of 3 upside of envelope seat is provided with spring detent 11, is provided on the outside of 1 lower end of integral tube and the matched card of spring detent 11
Slot 24, seal receptacle 3 are fixedly connected on the lower end of integral tube 1 by the cooperation of spring detent 11 and card slot 24.
When wellsite applications, before the lifting of integral tube 1, need that snap ring 4, box cupling 2 and seal receptacle 3 are first connected to integral tube 1
Lower end, advantageously ensure that the quick progress of 1 attended operation of integral tube.Snap ring 4, box cupling 2 and seal receptacle 3 are connect with integral tube 1
Process is：1) first by 2 sets of the box cupling lower ends in integral tube 1, then it is stuck in snap ring 4 on the annular groove, it is simple by this
The upper end of box cupling can be connected to the lower end of integral tube 1 by step, and the actual operating time for installing box cupling 2 and snap ring 4 is no more than 2
Second；2) spring detent 11 is made to be directed at the card slot 24 of 1 lower end outside of integral tube (at this point, the seal groove 10 is just with one
The lower end aligned of body pipe 1, to guarantee that the lower end of integral tube 1 is smoothly inserted into seal groove 10), then seal receptacle 3 is shifted to one
The end of body pipe 1, until the spring detent 11 is stuck in the card slot 24, so that seal receptacle 3 is fixedly mounted on one
The lower end of pipe 1, the actual operating time for installing seal receptacle are no more than 2 seconds.When integral tube 1 is attached after lifting by crane, by hydraulic
Box cupling is tightened in the upper end of another integral tube 1 by pincers, this mode of operation and behaviour when plain tubing is connect in the prior art
It is identical to make mode, operates used time 10-15 seconds.
During aforesaid operations, as long as polygamy installs snap ring 4, box cupling 2 and seal receptacle 3 for a worker, so that it may so that
The actual job time operating efficiency essentially identical therefore of the invention with the operating efficiency of well operations under oil pipe in the prior art be
It can guarantee that there is fabulous promotional value.
In the above-mentioned technical solutions, being provided on the articulated shaft of two semi-rings 7 keeps two semi-rings 7 poly- to the center of snap ring 4
The torsional spring 8 held together, snap ring 4 are clipped at the annular groove under the action of torsional spring 8 and are stuck in annular groove, it is ensured that after snap ring 4 is installed
It will not fall off easily from the annular groove, consequently facilitating the progress of construction.
When using technical solution described in the present embodiment, implementing process includes the following steps：
Step 1, packer is taken according to the quantity of waterflood path 6, each waterflood path 6 is correspondingly arranged a packer,
Packer uses Y341 type packer.
Y341 type packer is a kind of hydraulic setting packer, and central tube is provided on this packer, is set on central tube
It is equipped with the liquid pass hole for packer setting, in the technical scheme, packing can successfully be controlled by the control channel
Device is set, and easy to operate, easy to connect.
Step 2, the central tube of packer is removed, and the integral tube 1 using center with partition 5 is replaced, before replacement, is needed
Will the outside of integral tube 1 process with the former identical structure of central tube external structure, so that the integral tube 1 of replacement can be with
It is smoothly mounted on former packer, the liquid pass hole for packer setting is provided only on the tube wall of the integral tube 1 of replacement,
Liquid pass hole is located on the corresponding tube wall of control channel, to keep waterflood path in the case where guaranteeing that packer is smoothly set
It can be successfully by section where packer.
Step 3, tampered packer is connected on water injection string, and in lower going-into-well, the position of each packer is equal
More than corresponding layer position, to realize the closure to equivalent layer position.
Step 4, connect a set of ground control unit in the upper end of each waterflood path respectively, for pair
The injection flow and injection length of each layer of position are controlled.
Step 5, high pressure pump truck is connected in the side of the control channel, for providing liquid required for packer setting
Pressure.
Step 6, high pressure pump truck is opened, high pressure water reaches packers at different levels via control channel, makes packer setting, set
Packer afterwards blocks corresponding water filling layer position from upside.
Step 7, each ground control unit is adjusted according to injection project, makes to inject flow and injection length meets the requirements, it is complete
At accurate seperated layer water injection.
Embodiment two：
The difference of the present embodiment embodiment one is that the structure of water injection string is different.
In the present embodiment, the water injection string includes at least three independent tubing strings, is one in every independent tubing string
Described crosses liquid channel 6, and every independent tubing string is formed by connecting by 12 head and the tail of dispensing pipe that multiple lengths are 9-10 meters, dispensing pipe
12 radical determines on demand according to the depth of water filling layer position.9-10 meters be oil pipe in wellsite operation general length, will dispensing pipe
12 be designed to it is isometric with operation tubing, can make dispense pipe 12 match with existing operating equipment, thus reduce new equipment put into,
Reduce construction cost.
The casing adapter for connecting dispensing pipe 12 is provided on the water injection string, the structure of casing adapter includes spiral shell
Line set 15, top connection 17, upper fixed seat 16, lower contact 13 and lower fixed seat 14.
The upper end of top connection 17 is inserted on upper fixed seat 16 by the downside of upper fixed seat 16 and can be in plug-in opening freely
Rotation, the lower end of lower contact 13 is inserted on lower fixed seat 14 by the upside of lower fixed seat 14 and can freely be turned in plug-in opening
It is dynamic.Due to constantly rotating the portion of being soldered when the presence of structure, top connection 17 and lower contact 13 and the dispensing welding of pipe 12 is freely rotated
Position can make to facilitate welder's welding, so that welding quality be effectively ensured always towards outside at weldering position.On the contrary, if not having
Described is freely rotated structure, and welding rod is difficult in the crack for protruding into each top connection 17 or lower contact 13, and welding quality is difficult to ensure,
Even welding is unable to complete.
The lower end of top connection 17 is inserted in the upper end of lower contact 13, and the insertion mating surface of top connection 17 and lower contact 13
For sealing surface.By way of grafting seals, reliable sealing is realized between top connection 17 and lower contact 13.
The upper end cap of the thread bush 15 upper fixed seat 16 outside and under the position-limiting action of upper fixed seat 16 not
It can move down, the lower end of thread bush 15 is connect by screw thread with lower fixed seat 14, so that top connection 17 and lower contact 13 be consolidated
Surely it links together, is respectively welded at top connection by two dispensing pipes 12 that the casing adapter connects in same independent tubing string
17 and lower contact 13 on, to realize the connection of neighbouring two dispensings pipe 12, top connection 17 in casing adapter and under
Connector 13 is arranged in pairs, and the number of top connection 17 or lower contact 13 is identical as the quantity of independent tubing string.
In above-mentioned water injection string structure, each multiple casing adapters dispensed on pipe 12 need to only pass through an attended operation
Connection can be completed, individually connected without dispensing the casing adapter on pipe 12 to every, compared with prior art, together
Sample has the characteristics that connection is quick, largely improves joint efficiency.
Embodiment three：
The difference of the present embodiment embodiment one and embodiment two is that the structure of water injection string is different.
As shown in fig. 6, including an oil pipe column 25 and at least two outer tubing strings in water injection string described in the present embodiment
18, each outer tubing string 18 is the control channel, outer tubing string 18 in the outside for being distributed in oil pipe column 25, oil pipe column 25
Interior is the waterflood path, and every outer tubing string 18 is formed by connecting by more outer tube head and the tail, the length and composition of every outer tube
The length of every oil pipe of oil pipe column 25 is identical, and each outer tube in the outer tubing string 18 is connected by union 21.
It is had the following advantages that using above-mentioned structure type：
1) common packer can be directly connected on the oil pipe column 25 without being reequiped, and need not also be added
Other exchanging structures.
2) transfer testing tool into oil pipe column 25, can the operating conditions such as pressure, temperature to underground accurately measured,
It can carry out other a variety of required downhole operations.
As further technical solution, it is set with fixed disk 19 on the oil pipe column 25, oil pipe column 25 and outer
Locating piece 20 is fixedly installed on tubing string 18, wherein the locating piece 20 on oil pipe column 25 is against the upside of fixed disk 19, outside
Locating piece 20 on tubing string 18 is against the downside of fixed disk.(in Fig. 6, left end is downside, and right end is upside.) fixed by setting
Disk 19, each outer tubing string 18 can be suspended on the outside of oil pipe column 25, convenient for the progress of operation.
Claims (6)
1. two to seven layers of one kind are exempted from accurate testing dispenser, it is characterised in that：Including ground control unit and water injection string, ground
The electromagnetic flowmeter (23) and control valve (22) for controlling injection flow, the upper end of water injection string are provided in the control device of face
The water outlet of ground control unit is connected, the lower end of water injection string leads to underground and fills the water layer respectively to reach the mesh filled the water to water filling layer
, it is provided at least three in water injection string and crosses liquid channel (6), wherein it is control channel that one, which is crossed liquid channel, it is logical that remaining crosses liquid
Road is waterflood path.
2. a kind of two to seven layers according to claim 1 are exempted from accurate testing dispenser, it is characterised in that：The water filling
Tubing string is that 9-10 meters of integral tube (1) is formed by connecting from beginning to end by multiple lengths, and the radical of integral tube (1) is according to the depth of water filling layer position
Degree determines on demand, is provided with external screw thread on the outside of integral tube (1) upper end, is provided with annular groove on the outside of integral tube (1) lower end, one
Is provided with partition (5) in pipe (1), partition (5) and the tube wall of integral tube (1) are linked together, described mistake liquid channel (6) by every
Plate (5) is separated, and the connection structure of two adjacent integral tubes (1) includes snap ring (4), box cupling (2) and seal receptacle (3), institute
The snap ring (4) stated hingedly is formed by two semi-rings (7), and being provided on the articulated shaft of two semi-rings (7) makes two semi-rings (7) to card
The torsional spring (8) that the center of ring (4) is gathered, snap ring (4) are clipped at the annular groove under the action of torsional spring (8) and are stuck in annular groove
Interior, the upper end of the box cupling (2) is sleeved on the lower end of integral tube (1), snap ring (4) to the upper end of box cupling (2) limited from
And preventing box cupling (2) from being fallen off by the lower end of integral tube (1), the lower end of box cupling (2) is threadedly attached in another integral tube (1)
Upper end, so that two integral tubes (1) be linked together, the seal receptacle (3) is clipped between two integral tubes (1), close
The two sides up and down of envelope seat (3) are provided with the seal groove (10) that can be accommodated in the inner the end of integral tube (1), seal groove (10)
Slot bottom is provided with gasket (9), and the edge on the upside of the seal receptacle (3) is provided with spring detent (11), the integral tube (1)
It is provided on the outside of lower end and passes through spring detent (11) and card slot (24) with spring detent (11) matched card slot (24), seal receptacle (3)
Cooperation be fixedly connected on the lower end of integral tube (1).
3. a kind of two to seven layers according to claim 1 are exempted from accurate testing dispenser, it is characterised in that：The water filling
Tubing string includes at least three independent tubing strings, is to cross liquid channel (6) described in one in every independent tubing string, every independent tubing string is equal
It is formed by connecting from beginning to end by the dispensing pipe (12) that multiple lengths are 9-10 meters, dispensing manages the radical of (12) according to the depth of water filling layer position
It determines on demand, the casing adapter for connecting dispensing pipe (12), the structure packet of casing adapter is provided on the water injection string
Include thread bush (15), top connection (17), upper fixed seat (16), lower contact (13) and lower fixed seat (14), top connection (17) it is upper
It holds by being inserted on upper fixed seat (16) and can be freely rotated in plug-in opening on the downside of upper fixed seat (16), lower contact (13)
Lower end on the upside of lower fixed seat (14) by being inserted on lower fixed seat (14) and can be freely rotated in plug-in opening, top connection (17)
Lower end be inserted in the upper end of lower contact (13), and the insertion mating surface of top connection (17) and lower contact (13) be sealing surface,
The upper end cap of the thread bush (15) upper fixed seat (16) outside and cannot under the position-limiting action of upper fixed seat (16)
It moves down, the lower end of thread bush (15) is connect by screw thread with lower fixed seat (14), thus by top connection (17) and lower contact
(13) it is fixed together, is respectively welded in same independent tubing string by two dispensings pipe (12) that the casing adapter connects
In top connection (17) and lower contact (13), so that the connection of two neighbouring dispensing pipes (12) is realized, in casing adapter
Top connection (17) and lower contact (13) be arranged in pairs, the number of top connection (17) or lower contact (13) and the independent tubing string
Quantity it is identical.
4. a kind of two to seven layers according to claim 1 are exempted from accurate testing dispenser, it is characterised in that：The water filling
It include an oil pipe column (25) and at least two outer tubing strings (18) in tubing string, each outer tubing string (18) surround and is distributed in oil pipe column
(25) outside, it is the waterflood path in outer tubing string (18), every outer that interior oil pipe column (25), which is the control channel,
Tubing string (18) is formed by connecting by more outer tube head and the tail, every oil pipe of the length and composition oil pipe column (25) of every outer tube
Length is identical, and each outer tube in the outer tubing string (18) is connected by union (21).
5. a kind of two to seven layers according to claim 4 are exempted from accurate testing dispenser, it is characterised in that：The oil pipe
It is set on tubing string (25) fixed disk (19), is fixedly installed locating piece (20) on oil pipe column (25) and outer tubing string (18),
Wherein, the locating piece (20) on oil pipe column (25) is against the upside of fixed disk (19), the locating piece (20) on outer tubing string (18)
It is against the downside of fixed disk.
6. a kind of exempt from accurate testing using two to seven layers as claimed in claim 2 two to seven layer for exempting from accurate testing dispenser
Zonal injection technology, it is characterised in that include the following steps：
Step 1, packer is taken according to the quantity of waterflood path (6), each waterflood path (6) is correspondingly arranged a packer,
Packer uses Y341 type packer；
Step 2, the central tube of packer is removed, and the integral tube (1) using center with partition (5) is replaced, before replacement, is needed
To be processed on the outside of integral tube (1) with the former identical structure of central tube external structure, so as to the integral tube (1) of replacement
It can smoothly be mounted on former packer, one is provided only on the tube wall of the integral tube (1) of replacement for packer setting
Liquid pass hole, liquid pass hole are located on the corresponding tube wall of control channel；
Step 3, tampered packer is connected on water injection string, and in lower going-into-well, the position of each packer is respectively positioned on
It is more than corresponding layer position；
Step 4, a set of ground control unit is connected in the upper end of each waterflood path respectively, for each
The injection flow and injection length of layer position are controlled；
Step 5, high pressure pump truck is connected in the side of the control channel, it is hydraulic required for packer setting for providing；
Step 6, high pressure pump truck is opened, high pressure water reaches packers at different levels via control channel, makes packer setting, after setting
Packer blocks corresponding water filling layer position from upside；
Step 7, each ground control unit is adjusted according to injection project, makes to inject flow and injection length meets the requirements, completes essence
True seperated layer water injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810536333.4A CN108843287B (en) | 2018-05-30 | 2018-05-30 | Two to seven layers are exempted from accurate testing dispenser and technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810536333.4A CN108843287B (en) | 2018-05-30 | 2018-05-30 | Two to seven layers are exempted from accurate testing dispenser and technique |
Publications (2)
| Publication Number | Publication Date |
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| CN108843287A true CN108843287A (en) | 2018-11-20 |
| CN108843287B CN108843287B (en) | 2019-04-09 |
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|---|---|---|---|---|
| CN113107443A (en) * | 2021-04-29 | 2021-07-13 | 大庆市晟威机械制造有限公司 | Eccentric oilfield water distributor |
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|---|---|
| CN108843287B (en) | 2019-04-09 |
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