CN104453784A - Controllable soluble ball seat multistage fracturing sliding sleeve - Google Patents
Controllable soluble ball seat multistage fracturing sliding sleeve Download PDFInfo
- Publication number
- CN104453784A CN104453784A CN201410760692.XA CN201410760692A CN104453784A CN 104453784 A CN104453784 A CN 104453784A CN 201410760692 A CN201410760692 A CN 201410760692A CN 104453784 A CN104453784 A CN 104453784A
- Authority
- CN
- China
- Prior art keywords
- ball seat
- sliding sleeve
- solvable ball
- fracturing sliding
- solvable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000002195 soluble material Substances 0.000 claims description 13
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 229910001182 Mo alloy Inorganic materials 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910001080 W alloy Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 210000000664 rectum Anatomy 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 206010055018 Gingival cyst Diseases 0.000 description 3
- 210000004907 gland Anatomy 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
- E21B2200/06—Sleeve valves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of downhole control tools in the petroleum industry, and particularly relates to a controllable soluble ball seat multistage fracturing sliding sleeve which comprises an outer barrel and a lower sliding sleeve arranged in the outer barrel, wherein a soluble ball seat is arranged at the upper end of the lower sliding sleeve, two sealing ring grooves are longitudinally arranged on the outer surface of the soluble ball seat, and sealing rings are arranged in the two sealing ring grooves. The invention solves the problems of the diameter change of the pressed shaft caused by the production, well logging and the running of later-period operation tools. Compared with the prior art, the ball seat can gradually dissolve along with time, can form great full latus rectum in the pit shaft after dissolving, can exert oil gas well productivity to the utmost extent, great full latus rectum has simultaneously reduced the influence to borehole operation such as normal logging in later stage, well workover and later stage increase production transformation measures, has avoided the risk and the cost of drilling and grinding the ball seat moreover.
Description
Technical field
The invention belongs to petroleum industry down-hole control tool technical field, be specifically related to a kind of controllable type solvable ball seat multistage fracturing sliding sleeve.
Background technology
At present, domestic multilayer multistage fracturing reform mode many employings sliding sleeve class instrument, stage differential style is adopted to design between sliding sleeve at different levels, the ball sealer that need drop into some the ascending sizes corresponding with place level sliding sleeve is successively to complete the unlatching of each section of sliding sleeve and the isolation with the section of transformation, the ball sealer of the rear shutoff ball seat of pressure returns row's mode by open flow and discharges, sliding sleeve, down-hole stayed by ball seat, in final pit shaft, latus rectum is less, and enter to exist to have a big risk under the production logging of routine and later stage underground operation tool and even cannot enter down the problem of predetermined design position, if select brill to fall ball seat, then bore honed journey to have a big risk, cycle is long.
Summary of the invention
The object of the invention is to overcome the shortcoming existed in existing Oil/gas Well multilayer multistage fracturing reform sliding sleeve instrument.
For this reason, the invention provides a kind of controllable type solvable ball seat multistage fracturing sliding sleeve, comprise urceolus, be located at the low sleeve in urceolus, the upper end of described low sleeve is provided with solvable ball seat, and described solvable ball seat external surface is longitudinally provided with two seals ring recess, is all provided with sealing ring in described two seals ring recess.
Be the exposed band of annular soluble material between described two seals ring recess, the external surface of the exposed band of this annular soluble material is coated with molybdenum and tungsten alloy.
Described two seals ring recess is arranged about solvable ball seat Central Symmetry.
Described solvable ball seat entrance face is the conical surface.
Described solvable ball seat can pressure-bearing 70MPa.
Described solvable ball seat and the exposed band of annular soluble material are aluminum alloy materials, are made up of the aluminium of percetage by weight 85%, gallium-aluminium alloys, the Bi of the 5% and Cr of 5% of 5%.
Fracturing sliding bush instrument of the present invention except possess current oil gas field similar tools performance except, also possess following advantage:
1, the rear ball seat of pressure can be passed in time and progressively dissolve, and can form larger full-bore, farthest can play Oil & Gas Productivity after dissolving in pit shaft.
2, larger full-bore, decrease on the later stage normally log well, the impact of the underground work such as well workover and later stage storey increase design measure.
3, the risk and cost boring abrading-ball seat is avoided.
Be described in further details below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the structural representation of multistage sliding sleeve;
Fig. 2 is the solvable ball seat sectional drawing of controllable type;
Fig. 3 is open mode schematic diagram after controllable type solvable ball seat multistage fracturing sliding sleeve throwing ball sealer;
Fig. 4 is view after controllable type solvable ball seat multistage fracturing sliding sleeve tee dissolves;
Fig. 5 is the fracturing string schematic diagram that controllable type solvable ball seat multistage fracturing sliding sleeve and open hole packer form.
In figure: 1, top connection; 2, urceolus; 3, lower contact; 4, solvable ball seat; 5, low sleeve; 6, anticreep pin; 7, seal groove; 8, pressure break port; 9, the exposed band of annular soluble material; 10, locking ring; 11, screen casing; 12, float collar; 13, pressure reduction sliding sleeve; 14, second segment open hole packer; 15, section of two solvable ball seat fracturing sliding bush; 16, the 3rd section of open hole packer; 17, the 3rd section of solvable ball seat fracturing sliding bush; 18, the 4th section of open hole packer; 19, the 4th section of solvable ball seat fracturing sliding bush; 20, interfacing part is inserted in sealing; 21, ball sealer; 22, shear pin.
Detailed description of the invention
Embodiment 1:
In order to overcome the shortcoming existed in existing Oil/gas Well multilayer multistage fracturing reform sliding sleeve instrument: after pressure, in pit shaft, latus rectum is less, if bore ball seat, then boring honed journey and having a big risk.Present embodiments provide a kind of controllable type as shown in Figure 1, 2 solvable ball seat 4 multistage fracturing sliding sleeve, comprise urceolus 2, be located at the low sleeve 5 in urceolus 2, the upper end of low sleeve 5 is provided with solvable ball seat 4; Urceolus 2 two ends of the multistage sliding sleeve of solvable ball seat 4 are threaded connection with top connection 1 and lower contact 3 respectively, the bottom of thread adopts anticreep pin 6 to fix, and two seals circle seals, and urceolus 2 top barrel is provided with pressure break port 8, be provided with shear pin hole below pressure break port 8, shear pin 22 is housed; Low sleeve 5 is fixed by shear pin 22 and urceolus 2, and for shutoff pressure break port 8, low sleeve 5 bottom is designed with locking ring 10 groove, and locking ring 10 is housed, and again resets after opening for anti-anti-skid sheath.
Solvable ball seat 4 is close to low sleeve 5 upper end and is installed, and solvable ball seat 4 external surface is longitudinally provided with two seal grooves 7, and install two seals circle, solvable ball seat 4 is for the ball sealer 21 of seat place level correspondence.When well head pressurizes, ball sealer 21 promotes low sleeve 5 and moves down, and opens pressure break port 8.
Principle and the course of work of the present embodiment are as follows:
In urceolus 2, drop into ball sealer 21, ball sealer 21 drops on solvable ball seat 4, blocks solvable ball seat 4 central passage.Under hydraulic action, shear pin 22 is cut off, and solvable ball seat 4, under thrust, moves downward together with sliding sleeve 5, locking ring 10.After low sleeve 5 is blocked by lower contact 3, locking ring 10 is met large footpath and is ejected, and is locked on urceolus 2 by low sleeve 5.Solvable ball seat 4 moves down, and moves to large footpath, gradually contact liq, meets water soluble, in the water of 70 DEG C, ensure pressure-bearing and pressure break demand in 5 hours, dissolve completely in 15 days, along with soluble end expands gradually, solvable ball seat 4 is scattered, until dissolve completely, in well, tubing string forms larger full-bore.
Embodiment 2:
On the basis of embodiment 1, urceolus 2 two ends of multistage sliding sleeve are threaded connection with top connection 1 and lower contact 3 respectively, the bottom of thread adopts anticreep pin 6 to fix, two seals circle seals, urceolus 2 top barrel is provided with pressure break port 8, be provided with shear pin hole below pressure break port 8, shear pin 22 is housed; Low sleeve 5 is fixed by shear pin 22 and urceolus 2, and for shutoff pressure break port 8, low sleeve 5 bottom is designed with locking ring 10 groove, and locking ring 10 is housed, and again resets after opening for anti-anti-skid sheath.
Solvable ball seat 4 is close to low sleeve 5 upper end and is installed, solvable ball seat 4 external surface is longitudinally provided with two seal grooves 7, two seals circle is installed, the exposed band 9 of annular soluble material is formed between two seals ring recess 7, the external surface of the exposed band 9 of this annular soluble material is coated with molybdenum and tungsten alloy, solvable ball seat 4 entrance face conical surface design, for the ball sealer 21 of seat place level correspondence.When well head pressurizes, ball sealer 21 promotes low sleeve 5 and moves down, and opens pressure break port 8.The external surface of the exposed band of soluble material is coated with intensity and bearing capacity that molybdenum and tungsten alloy can increase solvable ball seat 4 further, makes overall more than the pressure-bearing 70MPa of sliding sleeve.
Before pressure break, the exposed band 9 of annular soluble material is between two seals circle, and low sleeve 5 moves down, the exposed band of annular soluble material 9 moves to large footpath, contacts well liquid gradually, starts to dissolve, soluble end expands ball seat gradually and is scattered, until dissolve completely, in well, tubing string forms larger full-bore.
Embodiment 3:
On the basis of embodiment 2, two seals ring recess 7 is arranged about solvable ball seat 4 Central Symmetry, makes pressure-bearing stress balance, and ball seat dissolves synchronous simultaneously, ensures to realize larger full-bore sooner.
As shown in Figure 3, drop into ball sealer 21 in urceolus 2, ball sealer 21 drops on solvable ball seat 4, blocks solvable ball seat 4 central passage.Under hydraulic action, shear pin 22 is cut off, and solvable ball seat 4, under thrust, moves downward together with sliding sleeve 5, locking ring 10.After low sleeve 5 is blocked by lower contact 3, locking ring 10 is met large footpath and is ejected, and is locked on urceolus 2 by low sleeve 5.Solvable ball seat 4 moves down, move to large footpath, because solvable ball seat 4 and the exposed band 9 of annular soluble material are aluminum alloy materials, be made up of the aluminium of percetage by weight 85%, gallium-aluminium alloys, the Bi of the 5% and Cr of 5% of 5%, when contact liq gradually, meet water soluble, in the water of 70 DEG C, ensure pressure-bearing and pressure break demand in 5 hours, dissolve completely in 15 days.As shown in Figure 4, along with soluble end expands gradually, solvable ball seat 4 is scattered, and solvable ball seat 4 dissolves completely, and in well, tubing string forms larger full-bore.
Fig. 5 is a kind of horizontal well open hole packer four sections of fracturing strings that controllable type solvable ball seat 4 multistage fracturing sliding sleeve uses, and needs to be increased to more multistage or minimizing hop count according to FRACTURING DESIGN.By shaft bottom to well head order successively by screen casing 11, float collar 12, pressure reduction sliding sleeve 13, second segment open hole packer 14, the solvable ball seat fracturing sliding bush 15 of second segment, 3rd section of open hole packer 16, 3rd section of solvable ball seat fracturing sliding bush 17, 4th section of open hole packer 18, 4th section of solvable ball seat fracturing sliding bush 19 and hanger and sealing are inserted interfacing part 20 and are formed, sealing inserts interfacing part 20 from bottom to up successively by hanging packer, tie-back sleeve, sealing intubate composition, hanging packer and tie-back sleeve adopt to detain and connect, there is gingival cyst of mucous gland in the newborn button tie-back sleeve inside, there is gingival cyst of mucous gland in the newborn button sealing outside, intubate lower end, sealing ring, sealing intubate lower end is inserted in tie-back sleeve, is mutually locked by gingival cyst of mucous gland in the newborn button, and sealing ring seals.Hanging packer, tie-back sleeve, sealing intubate are existing parts.
When open-hole horizontal well bores, after complete, drifting, solvable ball seat 4 fracturing sliding bush staged fracturing technology tube pillar is entered with under feeding tubing string (drilling rod), set open hole packer, after hanging packer, tubing string give up, the feeding tubing string (drilling rod) of straight well section be replaced by fracturing string.After pressure testing is qualified, the ball sealer 21 that well head drops into different size completes the pressing crack construction of each interval.
During pressure break, open pressure reduction sliding sleeve 13 by raising well head pressure and complete first paragraph pressure break, drop into less ball sealer 21 to open the solvable ball seat fracturing sliding bush 15 of second segment shutoff first paragraph and complete second segment pressure break, drop into and open the 3rd section of solvable ball seat fracturing sliding bush 17 and first, second section of shutoff with the 3rd section of supporting ball sealer 21, complete the 3rd section of pressure break, the like complete multistage pressing crack construction.After pressure break completes, open flow returns row and directly produces, and within about 10 days, Quan Jing solvable ball seat 4 at different levels is scattered, and within 15 days, dissolves completely, and down-hole string forms larger full-bore.
The supporting Novel sliding sleeve of the open hole packer of big orifice can be kept after pressure not to be only applicable to open hole packer fractured horizontal well, also to can be used for other sliding sleeve class fracturing without pulling string.
After the invention solves pressure, pit shaft reducing is to the problem of producing, logging well and entering to bring under later stage power tool.Compared with prior art, after pressure, ball seat can be passed in time and progressively dissolve, larger full-bore can be formed in pit shaft after dissolving, farthest can play Oil & Gas Productivity, larger full-bore simultaneously, decrease on the later stage normally log well, the impact of the underground work such as well workover and later stage storey increase design measure, and avoid the risk and cost boring abrading-ball seat.
The parts that the present embodiment does not describe in detail and structure belong to the well-known components of the industry and common structure or conventional means, do not describe one by one here.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (6)
1. a controllable type solvable ball seat multistage fracturing sliding sleeve, comprise urceolus (2), be located at the low sleeve (5) in urceolus (2), it is characterized in that: the upper end of described low sleeve (5) is provided with solvable ball seat (4), described solvable ball seat (4) external surface is longitudinally provided with two seals ring recess (7), is all provided with sealing ring in described two seals ring recess (7).
2. a kind of controllable type according to claim 1 solvable ball seat multistage fracturing sliding sleeve, it is characterized in that: be the exposed band of annular soluble material (9) between described two seals ring recess (7), the external surface of the exposed band of this annular soluble material (9) is coated with molybdenum and tungsten alloy.
3. a kind of controllable type according to claim 2 solvable ball seat multistage fracturing sliding sleeve, is characterized in that: described two seals ring recess (7) is arranged about solvable ball seat (4) Central Symmetry.
4. a kind of controllable type according to claim 1 solvable ball seat multistage fracturing sliding sleeve, is characterized in that: described solvable ball seat (4) entrance face is the conical surface.
5. a kind of controllable type according to claim 1 solvable ball seat multistage fracturing sliding sleeve, is characterized in that: described solvable ball seat (4) can pressure-bearing 70MPa.
6. a kind of controllable type according to claim 2 solvable ball seat multistage fracturing sliding sleeve, it is characterized in that: described solvable ball seat (4) and the exposed band of annular soluble material (9) are aluminum alloy materials, be made up of the aluminium of percetage by weight 85%, gallium-aluminium alloys, the Bi of the 5% and Cr of 5% of 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410760692.XA CN104453784B (en) | 2014-12-12 | 2014-12-12 | Controllable soluble ball seat multistage fracturing sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410760692.XA CN104453784B (en) | 2014-12-12 | 2014-12-12 | Controllable soluble ball seat multistage fracturing sliding sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104453784A true CN104453784A (en) | 2015-03-25 |
| CN104453784B CN104453784B (en) | 2018-09-04 |
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| CN201410760692.XA Active CN104453784B (en) | 2014-12-12 | 2014-12-12 | Controllable soluble ball seat multistage fracturing sliding sleeve |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105298461A (en) * | 2015-11-03 | 2016-02-03 | 东北石油大学 | Full-bore infinite-time soluble-ball-type fracturing sliding sleeve |
| CN105672943A (en) * | 2016-01-20 | 2016-06-15 | 中国石油化工股份有限公司 | Full-bore sliding sleeve with soluble structures |
| CN105937383A (en) * | 2016-06-20 | 2016-09-14 | 中国石油天然气股份有限公司 | Soluble full-bore ball seat working barrel |
| CN106481311A (en) * | 2015-08-27 | 2017-03-08 | 中国石油化工股份有限公司 | Ball-throwing type sliding sleeve and fracturing string |
| CN106639963A (en) * | 2016-12-28 | 2017-05-10 | 中国石油集团渤海钻探工程有限公司 | Degradable packer, multi-stage layering fracturing pipe column and fracturing construction method thereof |
| CN107013186A (en) * | 2017-05-02 | 2017-08-04 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of multistage slide bushing assembly of cluster formula and segmentation measure tubing string |
| CN107387050A (en) * | 2017-07-11 | 2017-11-24 | 中石化石油工程技术服务有限公司 | A kind of ball-throwing type full-bore fracturing sliding bush |
| CN107429556A (en) * | 2014-10-02 | 2017-12-01 | Sc资产有限公司 | For will expose in succession to allow the system along the pit shaft injecting fluid along the port of pit shaft |
| CN108625840A (en) * | 2017-03-23 | 2018-10-09 | 中石化石油工程技术服务有限公司 | The more cluster full-bore fracturing sliding bushs of ball-throwing type |
| CN108999591A (en) * | 2017-06-06 | 2018-12-14 | 中国石油天然气股份有限公司 | Fracturing sliding sleeve |
| CN109209318A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of fracturing sliding bush and the fracturing string comprising it |
| CN109209319A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of fracturing sliding bush and the fracturing string comprising it |
| CN109209317A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of pressure break pipe nipple and the fracturing string comprising it |
| CN109252845A (en) * | 2018-10-15 | 2019-01-22 | 中国石油集团渤海钻探工程有限公司 | A kind of solvable slide bushing assembly of separate stratum fracfturing full-bore |
| CN110306959A (en) * | 2018-03-20 | 2019-10-08 | 中国石油天然气股份有限公司 | Fracturing sliding sleeve |
| CN110847875A (en) * | 2019-11-19 | 2020-02-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Short-time throttling pipe column and short-time throttling method |
| CN110984911A (en) * | 2019-12-18 | 2020-04-10 | 中国石油天然气股份有限公司 | Fracturing sliding sleeve and fracturing sliding sleeve set of oil and gas well and using method |
| CN112709546A (en) * | 2019-10-24 | 2021-04-27 | 中国石油化工股份有限公司 | Pipeline crossing type efficient suspension releasing packer and method |
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Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107429556A (en) * | 2014-10-02 | 2017-12-01 | Sc资产有限公司 | For will expose in succession to allow the system along the pit shaft injecting fluid along the port of pit shaft |
| CN106481311A (en) * | 2015-08-27 | 2017-03-08 | 中国石油化工股份有限公司 | Ball-throwing type sliding sleeve and fracturing string |
| CN105298461B (en) * | 2015-11-03 | 2017-09-26 | 东北石油大学 | The unlimited solvable ball fracturing sliding bush of full-bore |
| CN105298461A (en) * | 2015-11-03 | 2016-02-03 | 东北石油大学 | Full-bore infinite-time soluble-ball-type fracturing sliding sleeve |
| CN105672943A (en) * | 2016-01-20 | 2016-06-15 | 中国石油化工股份有限公司 | Full-bore sliding sleeve with soluble structures |
| CN105672943B (en) * | 2016-01-20 | 2018-07-10 | 中国石油化工股份有限公司 | A kind of full-bore sliding sleeve with solvable solution structure |
| CN105937383A (en) * | 2016-06-20 | 2016-09-14 | 中国石油天然气股份有限公司 | Soluble full-bore ball seat working barrel |
| CN105937383B (en) * | 2016-06-20 | 2018-09-04 | 中国石油天然气股份有限公司 | Soluble full-bore ball seat working barrel |
| CN106639963A (en) * | 2016-12-28 | 2017-05-10 | 中国石油集团渤海钻探工程有限公司 | Degradable packer, multi-stage layering fracturing pipe column and fracturing construction method thereof |
| CN108625840A (en) * | 2017-03-23 | 2018-10-09 | 中石化石油工程技术服务有限公司 | The more cluster full-bore fracturing sliding bushs of ball-throwing type |
| CN107013186A (en) * | 2017-05-02 | 2017-08-04 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of multistage slide bushing assembly of cluster formula and segmentation measure tubing string |
| CN108999591A (en) * | 2017-06-06 | 2018-12-14 | 中国石油天然气股份有限公司 | Fracturing sliding sleeve |
| CN109209318A (en) * | 2017-07-04 | 2019-01-15 | 中国石油化工股份有限公司 | A kind of fracturing sliding bush and the fracturing string comprising it |
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| CN109209317B (en) * | 2017-07-04 | 2021-02-26 | 中国石油化工股份有限公司 | Fracturing nipple and fracturing pipe string comprising same |
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| CN110306959A (en) * | 2018-03-20 | 2019-10-08 | 中国石油天然气股份有限公司 | Fracturing sliding sleeve |
| CN109252845A (en) * | 2018-10-15 | 2019-01-22 | 中国石油集团渤海钻探工程有限公司 | A kind of solvable slide bushing assembly of separate stratum fracfturing full-bore |
| CN112709546A (en) * | 2019-10-24 | 2021-04-27 | 中国石油化工股份有限公司 | Pipeline crossing type efficient suspension releasing packer and method |
| CN112709546B (en) * | 2019-10-24 | 2022-12-06 | 中国石油化工股份有限公司 | Pipeline crossing type efficient suspension releasing packer and method |
| CN110847875A (en) * | 2019-11-19 | 2020-02-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Short-time throttling pipe column and short-time throttling method |
| CN110847875B (en) * | 2019-11-19 | 2023-12-05 | 中国石油天然气集团有限公司 | Short-time throttling pipe column and short-time throttling method |
| CN110984911A (en) * | 2019-12-18 | 2020-04-10 | 中国石油天然气股份有限公司 | Fracturing sliding sleeve and fracturing sliding sleeve set of oil and gas well and using method |
| CN110984911B (en) * | 2019-12-18 | 2023-12-22 | 中国石油天然气股份有限公司 | Fracturing sliding sleeve and fracturing sliding sleeve group of oil and gas well and use method |
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