CN108868734A - Gas well solvable packer multiple fracturing completion integral partial pressure tubular column and method - Google Patents
Gas well solvable packer multiple fracturing completion integral partial pressure tubular column and method Download PDFInfo
- Publication number
- CN108868734A CN108868734A CN201810369890.1A CN201810369890A CN108868734A CN 108868734 A CN108868734 A CN 108868734A CN 201810369890 A CN201810369890 A CN 201810369890A CN 108868734 A CN108868734 A CN 108868734A
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- Prior art keywords
- packer
- sliding sleeve
- soluble
- solvable
- ball seat
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/063—Valve or closure with destructible element, e.g. frangible disc
Abstract
The present invention provides gas well solvable packer multiple fracturing completion integral partial pressure tubular columns and method, partial pressure tubular column includes the flow nipple for being installed on oil pipe bottom end, is successively arranged the hydraulic anchor three being mounted on oil pipe, soluble packer three, sand blast sliding sleeve two, soluble packer two, sliding sleeve setting ball seat two, sand blast sliding sleeve one, hydraulic anchor one, soluble packer one, sliding sleeve setting ball seat one and gauguste cutter from top to bottom above flow nipple；Sand blast sliding sleeve one, hydraulic anchor one, soluble packer one and sliding sleeve setting ball seat correspond to first segment fractured layer；Hydraulic anchor three and the corresponding final stage fractured layer of soluble packer three；Sand blast sliding sleeve two, soluble packer two and sliding sleeve setting ball seat two are equipped with multiple groups, respectively correspond intermediate fractured layer.Fracturing process and tubing string of the invention solve the problems, such as after pressure pit shaft variable diameter the problem of bringing to production, well logging and later period power tool tripping in and due to unsealing failure caused by extraction tubing string it is difficult.
Description
Technical field
The invention belongs to gas field gas well fracturing technique fields, and in particular to a kind of gas well is complete with solvable packer multiple fracturing
Well integration partial pressure tubular column and method.
Background technique
The transformation of packer staged fracturing is that realize that hyposmosis, tight gas reservoir directional well multilayer are effectively employed important in casing
One of technology, with fractured interval, with strong points, multilayer is employed, the continuous feature of fracturing process.It is mostly used in its fracturing process
Sliding sleeve class opens tool, is designed between sliding sleeves at different levels using stage differential style, need to successively put into more corresponding by small with place grade sliding sleeve
The unlatching that the pressure difference sliding sleeve of each fractured interval is completed to large-sized ball sealer is isolated with section has been transformed, ball sealer after pressure
The ball sealer of seat is discharged by way of open flow, and sliding sleeve, ball seat stay in underground.But pressure break is returned with haydite and is spat when due to open flow,
Haydite can deposit on packing element, and existing packer is caused to there is a problem of deblocking difficulty, and tubing string rises and do not come out, and influences gas well
Production and the overhaul in later period and replacement flow string.Simultaneously as ball seat stays in underground, latus rectum is smaller in final pit shaft, causes
Producing well is carried out it is fashionable under conventional production logging and later period underground operation tool, there are risk even result in greatly can not under
Enter predetermined design position, if abrading-ball seat is bored in selection, drilling and grinding process risk is big, the period is long.
Summary of the invention
The object of the present invention is to provide a kind of gas well solvable packer multiple fracturing completion integral partial pressure tubular columns and side
Method, overcome existing gas well packer multiple fracturing be transformed present in pipe caused by removing seal for packer is difficult, latus rectum is small in pit shaft
Column cannot rise out, in addition can not tripping in predetermined design position the problem of.
For this purpose, the present invention provides the solvable packer multiple fracturing completion integral partial pressure tubular column of gas well, including installation
Flow nipple in oil pipe bottom end, flow nipple top are successively arranged the hydraulic anchor three being mounted on oil pipe, soluble envelope from top to bottom
Every device three, sand blast sliding sleeve one, hydraulic anchor one, soluble packer one, sliding sleeve setting ball seat one and gauguste cutter；
The sand blast sliding sleeve one, hydraulic anchor one, soluble packer one and sliding sleeve setting ball seat one are one group, corresponding first segment pressure
Parting；Hydraulic anchor three and soluble packer three are one group, corresponding final stage fractured layer.
Further include be located at sand blast sliding sleeve two between soluble packer three and sand blast sliding sleeve one along oil pipe from top to bottom, can
Molten formula packer two, sliding sleeve setting ball seat two；Sand blast sliding sleeve two, soluble packer two and sliding sleeve setting ball seat two are one group,
Equipped with multiple groups, each fractured layer between first segment fractured layer and final stage fractured layer is respectively corresponded.
The outer packing element of the soluble packer three, soluble packer two and soluble packer one is all made of solvable rubber
Glue is made.
The sliding sleeve setting ball seat two and sliding sleeve setting ball seat one are made of solvable aluminum alloy materials.
The sliding sleeve setting ball seat two and one pressure-bearing 70Mpa of sliding sleeve setting ball seat or more.
The external slips of the hydraulic anchor three and hydraulic anchor one are made of solvable aluminum alloy materials.
Gas well divides method with solvable packer multiple fracturing completion integral, includes the following steps：
Step 1 carries out perforation to transformation layer position using cable transmission perforation；
Gas well is connected to oil pipe and tripping in pit shaft with solvable packer multiple fracturing completion integral partial pressure tubular column by step 2
It is interior, then oil pipe is suppressed, the lowermost soluble packer one is set, and carries out first layer pressure break；
Step 3, after first layer pressure break, well head pitching, ball fall into first segment fractured layer to sliding sleeve setting ball seat one
On, differential sand blast sliding sleeve one is opened, and set the soluble packer two of intermediate fractured interval, carries out intermediate interval pressure break；
Step 4 successively puts into the ball of different-diameter in each layer according to the sequence that the diameter of ball is ascending, according to each layer
Sequence successively opens the pitching sand blast sliding sleeve of each layer from bottom to top, carries out the pressure break of each layer, until final stage fractured layer pressure break
It completes；
Step 5, after pressure break, mouth of shunting in a well carries out well head open flow, to each soluble packer because of pressure differential collapses, outer packing element
It shrinks, soluble packer unseals automatically, and gas well uses solvable packer multiple fracturing completion integral partial pressure tubular column as production
Tubing string stays in pit shaft, carries out drain production.
If returning drain with coming into contact with since pit shaft irregularly causes deblocking to fail, the outer packing element of soluble packer
Can sol rubber start to dissolve under wellbore conditions, each soluble removing seal for packer is gradually expanded in soluble end, meanwhile, sliding sleeve is set
Ball seat and the slips of hydraulic anchor also with the contact for returning drain and start to dissolve, as the carry out sliding sleeve setting ball seat of dissolution dissipates
It falls, until being completely dissolved, gas well forms big full-bore with solvable packer multiple fracturing completion integral partial pressure tubular column in well,
And then it is retained in pit shaft as flow string.
The slips of the outer packing element of soluble packer, sliding sleeve setting ball seat and hydraulic anchor is 6 under wellbore conditions in step 4
It is completely dissolved in it, gas well is movable with solvable packer multiple fracturing completion integral partial pressure tubular column.
Beneficial effects of the present invention：This gas well provided by the invention solvable packer multiple fracturing completion integral point
Pressure pipe column and method have the characteristics that structure is simple, installation is convenient with constructing operation.Meanwhile this pressure break completion integral pipe
Pit shaft variable diameter brings production, well logging and later period power tool tripping in and causes because unsealing failure after column solves the problems, such as pressure
Extraction tubing string difficulty problem.Compared with prior art, the outer packing element of packer after pressure, be set to sliding sleeve tee and hydraulic anchor
Slips all can gradually dissolve over time, can form larger full-bore after dissolution in pit shaft, can farthest play oil
Gas well deliverability, reduce normally log well to the later period, the influence of the underground work such as well workover and later period storey increase design measure, and keep away
The risk and cost of brill abrading-ball seat is exempted from.Meanwhile guarantee packer all unseals, and reduces later period extraction, replaces flow string
Risk.
The present invention is described in further details below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is that the gas field directional well of partial pressure three-layer is illustrated with solvable packer multiple fracturing completion integral partial pressure tubular column
Figure.
Fig. 2 is that two layers of partial pressure of gas field directional well is illustrated with solvable packer multiple fracturing completion integral partial pressure tubular column
Figure.
Description of symbols：1, flow nipple；2, gauguste cutter；3, sliding sleeve setting ball seat one；4, soluble packer one；5, water
Power anchor one；6, sand blast sliding sleeve one；7, sliding sleeve setting ball seat two；8, soluble packer two；9, sand blast sliding sleeve two；10, soluble
Packer three；11, hydraulic anchor three；12, oil pipe.
Specific embodiment
Embodiment 1：
A kind of solvable packer multiple fracturing completion integral partial pressure tubular column of gas well is present embodiments provided, as shown in Figure 1, packet
The flow nipple 1 for being installed on 12 bottom end of oil pipe is included, 1 top of flow nipple is successively arranged the hydraulic anchor being mounted on oil pipe 12 from top to bottom
3 11, soluble packer 3 10, sand blast sliding sleeve 1, hydraulic anchor 1, soluble packer 1, one 3 and of sliding sleeve setting ball seat
Gauguste cutter 2；
The sand blast sliding sleeve 1, hydraulic anchor 1, soluble packer 1 and sliding sleeve setting ball seat 1 are one group, correspond to first
Section fractured layer；Hydraulic anchor 3 11 and soluble packer 3 10 are one group, corresponding final stage fractured layer.
As shown in Figure 1, the solvable packer multiple fracturing completion integral of gas well divides two layers of pressure break of pipe point, gas well is used can
The application method and working principle of molten packer multiple fracturing completion integral partial pressure tubular column are as follows：
Step 1 carries out perforation to transformation layer position using cable transmission perforation；
Gas well is connected to oil pipe and tripping in pit shaft with solvable packer multiple fracturing completion integral partial pressure tubular column by step 2
It is interior, then oil pipe 12 is suppressed, the lowermost soluble packer 1 is set, and carries out first layer pressure break；
Step 3, after first layer pressure break, well head pitching, ball fall into first segment fractured layer to sliding sleeve setting ball seat one
On 3, differential sand blast sliding sleeve 1 is opened, and sets the soluble packer 3 10 of final stage fractured layer, carries out final stage
The pressure break of fractured layer；
Step 4, after pressure break, mouth of shunting in a well carries out well head open flow, to each soluble packer because of pressure differential collapses, outer glue
Cylinder is shunk, and soluble packer unseals automatically.
If returning drain with coming into contact with since pit shaft irregularly causes deblocking to fail, the outer packing element of soluble packer
Can sol rubber start to dissolve under wellbore conditions, each soluble removing seal for packer is gradually expanded in soluble end, meanwhile, sliding sleeve is set
Ball seat and the slips of hydraulic anchor also with the contact for returning drain and start to dissolve, as the carry out sliding sleeve setting ball seat of dissolution dissipates
It falls, until being completely dissolved, gas well forms big full-bore with solvable packer multiple fracturing completion integral partial pressure tubular column in well,
And then it is retained in pit shaft as flow string.
Embodiment 2：
On the basis of embodiment 1, as shown in Fig. 2, gas well with solvable packer multiple fracturing completion integral partial pressure tubular column also
Including sand blast sliding sleeve 29, the soluble being located at from top to bottom along oil pipe 12 between soluble packer 3 10 and sand blast sliding sleeve 1
Packer 28, sliding sleeve setting ball seat 27；Sand blast sliding sleeve 29, soluble packer 28 and sliding sleeve setting ball seat 27 are one group,
Equipped with multiple groups, each fractured layer between first segment fractured layer and final stage fractured layer is respectively corresponded.
It is split as shown in Fig. 2, the solvable packer multiple fracturing completion integral of gas well divides the lamination of pipe part three, gas well is used can
The application method and working principle of molten packer multiple fracturing completion integral partial pressure tubular column are as follows：
Step 1 carries out perforation to transformation layer position using cable transmission perforation；
Gas well is connected to oil pipe and tripping in pit shaft with solvable packer multiple fracturing completion integral partial pressure tubular column by step 2
It is interior, then oil pipe 12 is suppressed, the lowermost soluble packer 1 is set, and carries out first layer pressure break；
Step 3, after first layer pressure break, well head pitching, ball fall into first segment fractured layer to sliding sleeve setting ball seat one
On 3, differential sand blast sliding sleeve 1 is opened, and sets the soluble packer 28 of intermediate fractured interval, carries out intermediate interval pressure
It splits；
Step 4 successively puts into the ball of different-diameter in each layer according to the sequence that the diameter of ball is ascending, according to each layer
Sequence successively opens the pitching sand blast sliding sleeve of each layer from bottom to top, carries out the pressure break of each layer, until final stage fractured layer pressure break
It completes；The slips of the outer packing element of soluble packer, sliding sleeve setting ball seat and hydraulic anchor is completely molten in 6 days under wellbore conditions
Solution, gas well are movable with solvable packer multiple fracturing completion integral partial pressure tubular column
Step 5, after pressure break, mouth of shunting in a well carries out well head open flow, to each soluble packer because of pressure differential collapses, outer packing element
It shrinks, soluble packer unseals automatically.
Embodiment 3：
On the basis of embodiment 1, the soluble packer 3 10, soluble packer 28 and soluble packer 1
Outer packing element is all made of solvable rubber and is made.Sliding sleeve setting ball seat 27 and sliding sleeve setting ball seat 1 use solvable aluminum alloy materials system
At.Sliding sleeve setting ball seat 27 and one 3 pressure-bearing 70Mpa of sliding sleeve setting ball seat or more.The hydraulic anchor 3 11 and hydraulic anchor 1
External slips are made of solvable aluminum alloy materials.
After the completion of pressure break, the outer packing element of soluble packer 3 10, soluble packer 28 and soluble packer 1
It is dissolved with the external slips of hydraulic anchor 3 11 and hydraulic anchor 1, reduces the sand setting on packing element top, greatly improve the peace of tubing string taking-up
Quan Xing；Sliding sleeve setting ball seat 27 and sliding sleeve setting ball seat 1 dissolve, and tubular reduces at larger full-bore to the later period in well
The influence of the underground work such as normal well logging, well workover and later period storey increase design measure, avoids the risk and cost for boring abrading-ball seat.
It should be strongly noted that can sol rubber and solvable aluminum alloy materials be current material, specific composition is not
As protection point of the invention, no longer it is described in detail herein.
Embodiment 4：
A kind of gas well solvable packer multiple fracturing completion integral partial pressure method, includes the following steps：
Step 1 carries out perforation to transformation layer position using cable transmission perforation；
Gas well is connected to oil pipe and tripping in pit shaft with solvable packer multiple fracturing completion integral partial pressure tubular column by step 2
It is interior, then oil pipe 12 is suppressed, the lowermost soluble packer 1 is set, and carries out first layer pressure break；
Step 3, after first layer pressure break, well head pitching, ball fall into first segment fractured layer to sliding sleeve setting ball seat one
On 3, differential sand blast sliding sleeve 1 is opened, and sets the soluble packer 28 of intermediate fractured interval, carries out intermediate interval pressure
It splits；
Step 4 successively puts into the ball of different-diameter in each layer according to the sequence that the diameter of ball is ascending, according to each layer
Sequence successively opens the pitching sand blast sliding sleeve of each layer from bottom to top, carries out the pressure break of each layer, until final stage fractured layer pressure break
It completes；
Step 5, after pressure break, mouth of shunting in a well carries out well head open flow, to each soluble packer because of pressure differential collapses, outer packing element
It shrinks, soluble packer unseals automatically, and gas well uses solvable packer multiple fracturing completion integral partial pressure tubular column as production
Tubing string stays in pit shaft, carries out drain production.
Embodiment 5：
On the basis of embodiment 4, the solvable packer multiple fracturing completion integral of gas well divides method in separate stratum fracfturing
Cheng Zhong, if returning drain with coming into contact with since pit shaft irregularly causes deblocking to fail, packing element is solvable outside soluble packer
Rubber starts to dissolve under wellbore conditions, and each soluble removing seal for packer is gradually expanded in soluble end, meanwhile, sliding sleeve setting ball seat
With the slips of hydraulic anchor also with the contact for returning drain and start to dissolve, as the carry out sliding sleeve setting ball seat of dissolution is scattered,
Until being completely dissolved, gas well forms big full-bore with solvable packer multiple fracturing completion integral partial pressure tubular column in well, into
And it is retained in pit shaft as flow string.
Embodiment 6：
On the basis of embodiment 4, it should be noted that the outer packing element of soluble packer, sliding sleeve setting ball seat in step 4
It is completely dissolved in 6 days under wellbore conditions with the slips of hydraulic anchor, gas well solvable packer multiple fracturing completion integral point
Pressure pipe column is movable.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.The portion that the present embodiment does not describe in detail
The well-known components and common structure or conventional means of part and the structure category industry, do not describe one by one here.
Claims (9)
1. the solvable packer multiple fracturing completion integral partial pressure tubular column of gas well, it is characterised in that：Including being installed on oil pipe
（12）The flow nipple of bottom end（1）, flow nipple（1）Top is successively arranged is mounted on oil pipe from top to bottom（12）On hydraulic anchor three
（11）, soluble packer three（10）, sand blast sliding sleeve one（6）, hydraulic anchor one（5）, soluble packer one（4）, sliding sleeve sets
Ball seat one（3）And gauguste cutter（2）；
The sand blast sliding sleeve one（6）, hydraulic anchor one（5）, soluble packer one（4）With sliding sleeve setting ball seat one（3）It is one group,
Corresponding first segment fractured layer；Hydraulic anchor three（11）With soluble packer three（10）It is one group, corresponding final stage fractured layer.
2. the solvable packer multiple fracturing completion integral partial pressure tubular column of gas well as described in claim 1, it is characterised in that：
It further include from top to bottom along oil pipe（12）It is located at soluble packer three（10）With sand blast sliding sleeve one（6）Between sand blast sliding sleeve two
（9）, soluble packer two（8）, sliding sleeve setting ball seat two（7）；Sand blast sliding sleeve two（9）, soluble packer two（8）And sliding sleeve
Setting ball seat two（7）It is one group, is equipped with multiple groups, respectively corresponds each pressure between first segment fractured layer and final stage fractured layer
Parting.
3. the solvable packer multiple fracturing completion integral partial pressure tubular column of gas well as described in claim 1, it is characterised in that：
The soluble packer three（10）, soluble packer two（8）With soluble packer one（4）Outer packing element be all made of it is solvable
Rubber is made.
4. the solvable packer multiple fracturing completion integral partial pressure tubular column of gas well as described in claim 1, it is characterised in that：
The sliding sleeve setting ball seat two（7）With sliding sleeve setting ball seat one（3）It is made of solvable aluminum alloy materials.
5. the solvable packer multiple fracturing completion integral partial pressure tubular column of gas well as claimed in claim 4, it is characterised in that：
The sliding sleeve setting ball seat two（7）With sliding sleeve setting ball seat one（3）Pressure-bearing 70Mpa or more.
6. the solvable packer multiple fracturing completion integral partial pressure tubular column of gas well as described in claim 1, it is characterised in that：
The hydraulic anchor three（11）With hydraulic anchor one（5）External slips be made of solvable aluminum alloy materials.
7. the gas well solvable packer multiple fracturing completion integral point as described in any claim in claim 1~6
The partial pressure method of pressure pipe column, which is characterized in that include the following steps：
Step 1 carries out perforation to transformation layer position using cable transmission perforation；
Gas well is connected to oil pipe and tripping in pit shaft with solvable packer multiple fracturing completion integral partial pressure tubular column by step 2
It is interior, then to oil pipe（12）It is suppressed, the lowermost soluble packer one（4）It sets, carries out first layer pressure break；
Step 3, after first layer pressure break, well head pitching, ball fall into first segment fractured layer to sliding sleeve setting ball seat one
（3）On, open differential sand blast sliding sleeve one（6）, and set the soluble packer two of intermediate fractured interval（8）, carry out intermediate
Interval pressure break；
Step 4 successively puts into the ball of different-diameter in each layer according to the sequence that the diameter of ball is ascending, according to each layer
Sequence successively opens the pitching sand blast sliding sleeve of each layer from bottom to top, carries out the pressure break of each layer, until final stage fractured layer pressure break
It completes；
Step 5, after pressure break, mouth of shunting in a well carries out well head open flow, to each soluble packer because of pressure differential collapses, outer packing element
It shrinks, soluble packer unseals automatically, and gas well uses solvable packer multiple fracturing completion integral partial pressure tubular column as production
Tubing string stays in pit shaft, carries out drain production.
8. gas well as claimed in claim 7 divides method with solvable packer multiple fracturing completion integral, it is characterised in that：
If returning drain with coming into contact with since pit shaft irregularly causes deblocking to fail, packing element can sol rubber outside soluble packer
Starting to dissolve under wellbore conditions, each soluble removing seal for packer is gradually expanded in soluble end, meanwhile, sliding sleeve setting ball seat and water
The slips of power anchor also with the contact for returning drain and start to dissolve, as the carry out sliding sleeve setting ball seat of dissolution is scattered, until
It is completely dissolved, gas well forms big full-bore, Jin Erzuo with solvable packer multiple fracturing completion integral partial pressure tubular column in well
It is retained in pit shaft for flow string.
9. gas well as claimed in claim 7 divides method with solvable packer multiple fracturing completion integral, it is characterised in that：
The slips of the outer packing element of soluble packer, sliding sleeve setting ball seat and hydraulic anchor is complete in 6 days under wellbore conditions in step 4
Dissolution, gas well are movable with solvable packer multiple fracturing completion integral partial pressure tubular column.
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| CN201810369890.1A CN108868734A (en) | 2018-04-24 | 2018-04-24 | Gas well solvable packer multiple fracturing completion integral partial pressure tubular column and method |
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| CN201810369890.1A CN108868734A (en) | 2018-04-24 | 2018-04-24 | Gas well solvable packer multiple fracturing completion integral partial pressure tubular column and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109812248A (en) * | 2019-02-28 | 2019-05-28 | 中国石油天然气股份有限公司 | A kind of soluble flow controller and method |
| CN110206540A (en) * | 2019-05-23 | 2019-09-06 | 广州海洋地质调查局 | A kind of horizontal well annular space production profile test method and device |
| CN110454129A (en) * | 2019-08-08 | 2019-11-15 | 中国石油天然气股份有限公司 | A kind of gas well separate stratum fracfturing, the water integrated process pipe string of control |
| CN111622719A (en) * | 2019-02-28 | 2020-09-04 | 中国石油天然气股份有限公司 | Sand blasting perforation fracturing method for perforated production well |
| CN111980656A (en) * | 2020-07-27 | 2020-11-24 | 克拉玛依市红都有限责任公司 | Three-layer three-stage acid fracturing flow-back test integration method |
| CN112412423A (en) * | 2020-11-13 | 2021-02-26 | 中国石油集团渤海钻探工程有限公司 | Full-bore soluble throttling bottom valve for separate layer fracturing |
| CN112412404A (en) * | 2020-11-13 | 2021-02-26 | 中国石油集团渤海钻探工程有限公司 | Full-bore soluble sliding sleeve assembly multistage fracturing string for separate-layer fracturing and fracturing method thereof |
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Application publication date: 20181123 |