CN109296349A - Piston type delayed start-up toe-end sliding sleeve - Google Patents
Piston type delayed start-up toe-end sliding sleeve Download PDFInfo
- Publication number
- CN109296349A CN109296349A CN201811309139.9A CN201811309139A CN109296349A CN 109296349 A CN109296349 A CN 109296349A CN 201811309139 A CN201811309139 A CN 201811309139A CN 109296349 A CN109296349 A CN 109296349A
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- central tube
- toe
- delay
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- 230000003111 delayed effect Effects 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000010720 hydraulic oil Substances 0.000 claims description 24
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000013016 damping Methods 0.000 claims description 19
- 239000007788 liquid Substances 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 8
- 241001484259 Lacuna Species 0.000 claims description 2
- 238000005336 cracking Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 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
- 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
- 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
-
- 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
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
- E21B34/085—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained with time-delay systems, e.g. hydraulic impedance mechanisms
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- 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)
- Fluid-Damping Devices (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of piston type delayed start-up toe-end sliding sleeves, including top connection, shell, time-delay mechanism, central tube, opener and lower contact, top connection and lower contact connect with shell top and bottom respectively and seal cooperation, central tube upper end connect with top connection and seals cooperation, lower end and lower contact sealing cooperate, time-delay mechanism is set between shell and central tube, and opener is set in lower contact；Shell has been arranged radially pressure break collar extension, and central tube corresponds to pressure break collar extension and has been disposed radially pressure break internal orifice, is closed between pressure break collar extension and pressure break internal orifice by the unlatching piston of time-delay mechanism；When wellbore fluid reaches setup pressure value, opener starting drives time-delay mechanism's starting, pushes unlatching piston is mobile until pressure break collar extension is communicated with pressure break internal orifice after setting duration.It is harsh and open the technical problems such as success rate is low that toe-end sliding sleeve cracking pressure error range in the presence of the prior art can effectively solve using the present invention.
Description
Technical field
The present invention relates to a kind of piston type delayed start-up toe-end sliding sleeves to belong to for realizing shale gas well first section fracturing reform
In the manufacturing technology field of industrial gas oil underground operation tool.
Background technique
At present there are two types of shale gas well first section fracturing reform modes: one is coiled tubing transmission perforations；Another kind is toe
Hold sliding sleeve.Coiled tubing transmission perforation mode technology maturation is reliable, but timeliness of constructing is low, and tripping in is limited in ultra-long horizontal well；
Toe-end sliding sleeve mode directly builds the pressure unlatching, and construction timeliness is high, is not limited by horizontal section length.Toe-end sliding sleeve is relative to continuous oil
Pipe transmission perforation mode has the advantages such as operation timeliness is high, at low cost, risk is small, depth of implements is unrestricted, but since toe-end is sliding
Set technology is immature, and unlatching success rate is low, and shale gas first section pressure break channel is still based on coiled tubing transmission perforation at present.Due to
Shale gas reservoir permeability is extremely low, and shale gas yield and drilling hole number and pressure break scale are closely related, continuous with drilling technology
Progress, ultra-long horizontal section (2500 meters or more) horizontal well by be Efficient Development shale gas development trend, coiled tubing transmission penetrates
Hole mode has been unable to meet deep layer, ultra-long horizontal well first section pressure break perforation demand.Existing toe-end sliding sleeve technology unlatching success rate is low,
It is primarily present following technological deficiency:
1, need full well pressure testing 90MPa to examine pit shaft leakproofness before domestic shale gas well pressing crack construction, it is domestic at present to use ground
Face high pressure pipe joint pressure-bearing grade is 15000psi, and highest pressure limiting does not allow more than 100MPa when construction, therefore, existing toe-end sliding sleeve
Opening pump pressure can only allow cracking pressure error range harsh within the scope of 90-100MPa；
2, existing toe-end sliding sleeve is largely opened by the way of rupture, after cement slurry sets to its cracking pressure have compared with
It is big to influence, cause toe-end sliding sleeve to open success rate lower.
Summary of the invention
It is an object of the invention to overcome the above problem of the existing technology, a kind of piston type delayed start-up toe-end is provided
Sliding sleeve.It is harsh and open that toe-end sliding sleeve cracking pressure error range in the presence of the prior art can effectively solve using the present invention
Open the technical problems such as success rate is low.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of piston type delayed start-up toe-end sliding sleeve, it is characterised in that: including top connection, shell, time-delay mechanism, central tube, open
Open mechanism and lower contact, top connection and lower contact connect with shell top and bottom respectively and seal cooperation, central tube upper end with
Top connection connection and sealing cooperation, lower end and lower contact sealing cooperate, and time-delay mechanism is set between shell and central tube, opens
Mechanism is set in lower contact；Shell has been arranged radially pressure break collar extension, and central tube corresponds to pressure break collar extension and has been disposed radially pressure break
Internal orifice is closed between pressure break collar extension and pressure break internal orifice by the unlatching piston of time-delay mechanism；When wellbore fluid reaches setting pressure
When value, opener starting drives time-delay mechanism's starting, pushes unlatching piston mobile until pressure break collar extension after setting duration
It is communicated with pressure break internal orifice.
Be provided with step on outer wall in the middle part of the central tube, be axially provided with clearance hole at step, and stepped outer surface with
Inner walls sealing cooperation.
The time-delay mechanism includes opening air chamber, opening piston, is delay chamber, batching pig, damping mouth, filter plate, hydraulic
Oil pocket and delay piston open air chamber, manage the gap between shell centered on be delayed chamber and hydraulic oil Qiang Zhuo, open air
Chamber is located at top connection and opens between piston, and delay chamber is in open between piston and central tube step, hydraulic fluid chamber is located at
Between heart pipe step and lower contact, open piston by unlatching shear pin and be fixed on center tube outer surface, and with shell and central tube
Sealing cooperation, batching pig is fixed on clearance hole close to delay chamber one end by cutting off, and seals and cooperate with clearance hole, and damping mouth connects
It is connected to the clearance hole other end, and seals and cooperates with clearance hole, filter plate setting is adjacent with damping mouth in hydraulic fluid chamber one end, delay
Piston is arranged in the hydraulic fluid chamber other end, and seals and cooperate with hydraulic fluid chamber, and hydraulic oil is injected in hydraulic fluid chamber.
The lower contact has been arranged radially control hole, is axially provided with pressure transmission hole, and control hole is connected to pressure transmission hole.
The opener includes sealing-plug and control piston, and sealing-plug is radially connected by screw thread with lower contact, and with
Control hole sealing cooperation, control piston is fixed on inside sealing-plug by controlling shear pin, and is sealed and cooperated with sealing-plug inner wall；When
It controls shear pin to cut, when opener starts, controls piston motion to sealing-plug bottom, liquid enters hydraulic oil by pressure transmission hole
Chamber pushes delay piston to move up.
Be provided with overcurrent annular groove in the control hole, when controlling piston motion to sealing-plug bottom, control piston with it is close
Moved down at the sealing cooperation of blocking, liquid pass sequentially through control piston and sealing-plug between gap and shear pin interporal lacuna entered
Annular groove is flowed, then flows into pressure transmission hole.
Radial flowing hole is provided on the sealing-plug, flowing hole is connected to overcurrent annular groove, and control piston motion is to close
When blocking bottom, liquid passes sequentially through gap, flowing hole and overcurrent annular groove between control piston and sealing-plug and flows into pressure transmission
Hole.
The delay piston moves up, and pushes hydraulic oil to enter damping mouth by filter plate and flows into clearance hole, works as clearance hole
When hydraulic oil reaches setup pressure value, cutting is cut off, hydraulic oil enters delay chamber start-up study mechanism, by setting duration, when
It when delay chamber hydraulic oil reaches setup pressure value, opens shear pin and cuts, push to open moving up into unlatching air chamber on piston, until
Pressure break collar extension is communicated with pressure break internal orifice.
The top connection and lower contact are connect with shell upper and lower side by threaded coaxial respectively, central tube upper end and top connection
It is connected by threaded coaxial, lower end and lower contact co-axial seal cooperate.
The damping mouth is connected to the clearance hole other end by threaded coaxial.
The sealing-plug is closed at one end, and other end perforation, perforation end is connected to pit shaft inner cavity.
Using the present invention has the advantages that
1, opener replaces rupture disc structures using piston cylinder operator, makes it have isolation cement slurry function, reduces unlatching
Pressure error reduces the influence after cement slurry sets to toe-end sliding sleeve cracking pressure.
2, time-delay mechanism can open sliding sleeve by one section of delay process, expand toe-end lower than starting under pressure test pressure
Sliding sleeve cracking pressure allowable error range, improves unlatching success rate.
3, the present invention can effectively solve the toe-end in the presence of the prior art for realizing shale gas well first section fracturing reform
The technical problems such as sliding sleeve cracking pressure error range is harsh and unlatching success rate is low, can effectively reduce shale gas development cost,
It has a extensive future.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is that the liquid after opener of the present invention starting flows to enlarged diagram；
In the figure, it is marked as 1, top connection, 2, shell, 3, time-delay mechanism, 4, central tube, 5, opener, 6, lower contact, 7, unlatching
Air chamber, 8, open piston, 9, pressure break internal orifice, 10, pressure break collar extension, 11, open shear pin, 12, delay chamber, 13, cut off, 14, every
From plug, 15, clearance hole, 16, damping mouth, 17, filter plate, 18, hydraulic fluid chamber, 19, delay piston, 20, pressure transmission hole, 21, control
Hole, 22, sealing-plug, 23, control piston, 24, control shear pin.
Specific embodiment
Embodiment 1
A kind of piston type delayed start-up toe-end sliding sleeve, including top connection 1, shell 2, time-delay mechanism 3, central tube 4, opener 5
With lower contact 6, top connection 1 and lower contact 6 connect with 2 top and bottom of shell respectively and seal cooperation, 4 upper end of central tube with it is upper
The connection of connector 1 and sealing cooperation, lower end and the sealing of lower contact 6 cooperate, and time-delay mechanism 3 is set between shell 2 and central tube 4,
Opener 5 is set in lower contact 6；Shell 2 has been arranged radially pressure break collar extension 10, and the corresponding pressure break collar extension 10 of central tube 4 is along diameter
To pressure break internal orifice 9 is provided with, closed between pressure break collar extension 10 and pressure break internal orifice 9 by the unlatching piston 8 of time-delay mechanism 3；Work as well
When cylinder liquid reaches setup pressure value, the starting of opener 5 drives time-delay mechanism 3 to start, and pushes and opens after setting duration
Piston 8 is mobile until pressure break collar extension 10 is communicated with pressure break internal orifice 9.
It is provided with step on the 4 middle part outer wall of central tube, clearance hole 15, and stepped outer surface are axially provided at step
It seals and cooperates with 2 inner wall of shell.
The time-delay mechanism 3 includes opening air chamber 7, opening piston 8, delay chamber 12, batching pig 14, damping mouth 16, mistake
Filter plate 17, hydraulic fluid chamber 18 and delay piston 19 open air chamber 7, pipe 4 and shell centered on be delayed chamber 12 and 18 Zhuo of hydraulic fluid chamber
Gap between body 2, unlatching air chamber 7 are located at top connection 1 and open between piston 8, and delay chamber 12, which is located at, opens piston 8 in
Between 4 step of heart pipe, hydraulic fluid chamber 18 is located between 4 step of central tube and lower contact 6, opens piston 8 by opening shear pin 11
It is fixed on 4 outer surface of central tube, and is cooperated with shell 2 and the sealing of central tube 4, batching pig 14 is fixed on clearance hole by cutting off 13
15 close to delay 12 one end of chamber, and seal and cooperate with clearance hole 15, and damping mouth 16 is connected to 15 other end of clearance hole, and be isolated
The sealing cooperation of hole 15, the setting of filter plate 17 is adjacent with damping mouth 16 in 18 one end of hydraulic fluid chamber, and delay piston 19 is arranged hydraulic
18 other end of oil pocket, and seal and cooperate with hydraulic fluid chamber 18, hydraulic oil is injected in hydraulic fluid chamber 18.
The lower contact 6 has been arranged radially control hole 21, is axially provided with pressure transmission hole 20, and control hole 21 and pressure transmission hole 20 connect
It is logical.
The opener 5 includes sealing-plug 22 and control piston 23, and sealing-plug 22 is radially connected with lower contact 6 by screw thread
It connects, and seals and cooperate with control hole 21, control piston 23 is fixed on inside sealing-plug 22 by controlling shear pin 24, and and sealing-plug
The sealing cooperation of 22 inner walls；When control shear pin 24 is cut, when opener 5 starts, control piston 23 moves to 22 bottom of sealing-plug,
Liquid enters hydraulic fluid chamber 18 by pressure transmission hole 20 and delay piston 19 is pushed to move up.
Overcurrent annular groove is provided in the control hole 21, when control piston 23 moves to 22 bottom of sealing-plug, control is lived
Plug 23 with moved down at the sealing cooperation of sealing-plug 22, liquid passes sequentially through the gap controlled between piston 23 and sealing-plug 22 and cuts
Nail hole gap enters overcurrent annular groove, then flows into pressure transmission hole 20.
It is provided with radial flowing hole on the sealing-plug 22, flowing hole is connected to overcurrent annular groove, and control piston 23 moves
When to 22 bottom of sealing-plug, liquid passes sequentially through gap, flowing hole and overcurrent annular between control piston 23 and sealing-plug 22
Slot flows into pressure transmission hole 20.
The delay piston 19 moves up, and pushes hydraulic oil to enter damping mouth 16 by filter plate 17 and flows into clearance hole 15,
When 15 hydraulic oil of clearance hole reaches setup pressure value, 13 cuttings are cut off, hydraulic oil enters delay 12 start-up study mechanism 3 of chamber,
By setting duration, when 12 hydraulic oil of chamber that is delayed reaches setup pressure value, opens shear pin 11 and cut, push and open on piston 8
It moves up into and opens air chamber 7, until pressure break collar extension 10 is communicated with pressure break internal orifice 9.
The top connection 1 and lower contact 6 are connect with 2 upper and lower side of shell by threaded coaxial respectively, 4 upper end of central tube with it is upper
Connector 1 is connected by threaded coaxial, and lower end and 6 co-axial seal of lower contact cooperate.
The damping mouth 16 is connected to 15 other end of clearance hole by threaded coaxial.
The sealing-plug 22 is closed at one end, and other end perforation, perforation end is connected to pit shaft inner cavity.
Embodiment 2
As preferred forms of the invention, as shown, it mainly includes top connection 1, shell 2, time-delay mechanism 3, center
Pipe 4, opener 5 and lower contact 6, the top connection 1 are connect with 2 upper and lower side of shell by threaded coaxial respectively with lower contact 6
And sealing cooperation, 4 upper end of central tube connect by threaded coaxial with top connection 1 and seal cooperation, lower end and lower contact 6 are same
Sealing cooperation, the time-delay mechanism 3 are set between shell 2 and central tube 4, and the opener 5 is set in lower contact 6
Portion.
In the present embodiment, shell 2 has been arranged radially pressure break collar extension 10.
In the present embodiment, central tube 4 has been arranged radially pressure break internal orifice 9, is axially provided at 4 middle bench of central tube
Clearance hole 15, and stepped outer surface and the sealing of 2 inner wall of shell cooperate.
In the present embodiment, time-delay mechanism 3 is mainly by unlatching air chamber 7, unlatching piston 8, delay chamber 12, batching pig 14, resistance
Buddhist nun's mouth 16, filter plate 17, hydraulic fluid chamber 18 and delay piston 19 form, and the unlatching piston 8 is fixed on by opening shear pin 11
4 outer surface of central tube, and cooperate simultaneously with shell 2 and the sealing of central tube 4, the batching pig 14 is fixed on isolation by cutting off 13
Hole 15 seals with clearance hole 15 and cooperates close to delay 12 one end of chamber, and the damping mouth 16 is connected to isolation by threaded coaxial
15 other end of hole, and seal and cooperate with clearance hole 15, the filter plate 17 is installed on 18 one end of hydraulic fluid chamber and damping 16 phase of mouth
Neighbour, the delay piston 19 is installed on 18 other end of hydraulic fluid chamber, and seals and cooperate with hydraulic fluid chamber 18, the hydraulic fluid chamber 18
Interior injection hydraulic oil.
In the present embodiment, lower contact 6 has been arranged radially control hole 21, is axially provided with pressure transmission hole 20, the control hole 21
Inside it is provided with overcurrent annular groove.
In the present embodiment, opener 5 is mainly made of sealing-plug 22 and control piston 23, and the sealing-plug 22 connects under
First 6 is radially connected by screw thread, and seals and cooperate with control hole 21, and the control piston 23 is fixed on close by control shear pin 24
Inside blocking 22, and seals and cooperate with 22 inner wall of sealing-plug.
Its workflow and principle are as follows:
Contraction in Site carries out full wellbore pressure test, and when wellbore fluid reaches setup pressure value, control shear pin 24 is cut, control
Piston 23 falls into 22 bottom of sealing-plug, i.e. opener starts, and liquid enters pressure transmission hole 20 by overcurrent annular groove and pushes delay
Piston 19 moves up, and delay piston 19 can push hydraulic oil to enter damping mouth 16 by filter plate 17 and flow into clearance hole 15, when
When 15 hydraulic oil of clearance hole reaches setup pressure value, 13 cuttings are cut off, hydraulic oil can enter delay chamber 12, i.e. time-delay mechanism 3
Starting, when 12 hydraulic oil of chamber that is delayed reaches setup pressure value, is opened shear pin 11 and is cut, can push open by setting duration
It opens to move up on piston 8 and opens air chamber 7, until pressure break collar extension 10 is communicated with pressure break internal orifice 9, i.e., toe-end sliding sleeve is opened.
Claims (10)
1. a kind of piston type delayed start-up toe-end sliding sleeve, it is characterised in that: including top connection (1), shell (2), time-delay mechanism
(3), central tube (4), opener (5) and lower contact (6), top connection (1) and lower contact (6) respectively with shell (2) upper end and
Lower end connection and sealing cooperation, central tube (4) upper end connect with top connection (1) and seal cooperation, and lower end and lower contact (6) seal
Cooperation, time-delay mechanism (3) are set between shell (2) and central tube (4), and opener (5) is set in lower contact (6)；Shell
Body (2) has been arranged radially pressure break collar extension (10), and central tube (4) corresponding pressure break collar extension (10) has been disposed radially pressure break internal orifice (9),
It is closed between pressure break collar extension (10) and pressure break internal orifice (9) by the unlatching piston (8) of time-delay mechanism (3)；When wellbore fluid reaches
When setup pressure value, opener (5) starting drives time-delay mechanism (3) starting, pushes after setting duration and opens piston (8)
Movement is until pressure break collar extension (10) are communicated with pressure break internal orifice (9).
2. piston type delayed start-up toe-end sliding sleeve according to claim 1, it is characterised in that: in the middle part of the central tube (4)
It is provided with step on outer wall, is axially provided at step clearance hole (15), and stepped outer surface is matched with the sealing of shell (2) inner wall
It closes.
3. piston type delayed start-up toe-end sliding sleeve according to claim 2, it is characterised in that: time-delay mechanism (3) packet
It includes and opens air chamber (7), open piston (8), is delay chamber (12), batching pig (14), damping mouth (16), filter plate (17), hydraulic
Oil pocket (18) and delay piston (19), open air chamber (7), delay chamber (12) and hydraulic fluid chamber (centered on 18) Zhuo manage (4) and
Gap between shell (2) opens air chamber (7) and is located at top connection (1) and opens between piston (8), and delay chamber (12) is located at
It opens between piston (8) and central tube (4) step, hydraulic fluid chamber (18) is located between central tube (4) step and lower contact (6),
It opens piston (8) and is fixed on central tube (4) outer surface by opening shear pin (11), and match with shell (2) and central tube (4) sealing
It closes, batching pig (14) is fixed on clearance hole (15) close delay chamber (12) one end by cutting off (13), and close with clearance hole (15)
Envelope cooperation, damping mouth (16) is connected to clearance hole (15) other end, and seals and cooperate with clearance hole (15), filter plate (17) setting
Adjacent with damping mouth (16) in hydraulic fluid chamber (18) one end, delay piston (19) is arranged in hydraulic fluid chamber (18) other end, and with
Hydraulic fluid chamber (18) sealing cooperation, hydraulic fluid chamber (18) is interior to inject hydraulic oil.
4. piston type delayed start-up toe-end sliding sleeve according to claim 3, it is characterised in that: the lower contact (6) is radial
Control hole (21) are provided with, are axially provided with pressure transmission hole (20), and control hole (21) is connected to pressure transmission hole (20).
5. piston type delayed start-up toe-end sliding sleeve according to claim 4, it is characterised in that: opener (5) packet
Sealing-plug (22) and control piston (23) are included, sealing-plug (22) is radially connected by screw thread with lower contact (6), and and control hole
(21) sealing cooperation, by controlling shear pin (24), to be fixed on sealing-plug (22) internal for control piston (23), and with sealing-plug (22)
Inner wall sealing cooperation；When control shear pin (24) is cut, and opener (5) starts, control piston (23) moves to sealing-plug
(22) bottom, liquid enter hydraulic fluid chamber (18) by pressure transmission hole (20) and delay piston (19) are pushed to move up.
6. piston type delayed start-up toe-end sliding sleeve according to claim 5, it is characterised in that: set in the control hole (21)
It is equipped with overcurrent annular groove, when control piston (23) moves to sealing-plug (22) bottom, control piston (23) and sealing-plug (22)
It is moved down at sealing cooperation, liquid passes sequentially through gap and the entrance of shear pin interporal lacuna between control piston (23) and sealing-plug (22)
Overcurrent annular groove, then flow into pressure transmission hole (20).
7. piston type delayed start-up toe-end sliding sleeve according to claim 6, it is characterised in that: set on the sealing-plug (22)
It is equipped with radial flowing hole, flowing hole is connected to overcurrent annular groove, when control piston (23) moves to sealing-plug (22) bottom, liquid
Gap, flowing hole and the overcurrent annular groove passed sequentially through between control piston (23) and sealing-plug (22) flows into pressure transmission hole (20).
8. piston type delayed start-up toe-end sliding sleeve according to claim 7, it is characterised in that: on the delay piston (19)
It moves, pushes hydraulic oil to enter damping mouth (16) by filter plate (17) and flow into clearance hole (15), when clearance hole (15) hydraulic oil
When reaching setup pressure value, (13) cutting is cut off, and hydraulic oil enters delay chamber (12) start-up study mechanism (3), when by setting
It is long, it when chamber (12) hydraulic oil that is delayed reaches setup pressure value, opens shear pin (11) and cuts, push to open being moved on piston (8)
Enter to open air chamber (7), until pressure break collar extension (10) are communicated with pressure break internal orifice (9).
9. piston type delayed start-up toe-end sliding sleeve according to claim 8, it is characterised in that: the top connection (1) and under
Connector (6) is connect with shell (2) upper and lower side by threaded coaxial respectively, and central tube (4) upper end is same by screw thread with top connection (1)
Axis connection, lower end and lower contact (6) co-axial seal cooperate.
10. piston type delayed start-up toe-end sliding sleeve according to claim 9, it is characterised in that: the damping mouth (16) is logical
It crosses threaded coaxial and is connected to clearance hole (15) other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309139.9A CN109296349B (en) | 2018-11-05 | 2018-11-05 | Piston type delay opening toe end sliding sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811309139.9A CN109296349B (en) | 2018-11-05 | 2018-11-05 | Piston type delay opening toe end sliding sleeve |
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| Publication Number | Publication Date |
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| CN109296349A true CN109296349A (en) | 2019-02-01 |
| CN109296349B CN109296349B (en) | 2023-09-15 |
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| CN201811309139.9A Active CN109296349B (en) | 2018-11-05 | 2018-11-05 | Piston type delay opening toe end sliding sleeve |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541687A (en) * | 2019-09-23 | 2019-12-06 | 中国石油集团川庆钻探工程有限公司 | Toe end sliding sleeve capable of controlled delay opening |
| CN111622710A (en) * | 2020-06-09 | 2020-09-04 | 中国石油天然气集团有限公司 | High-pressure activation pressure guide mechanism of sliding sleeve tool and use method |
| CN111691853A (en) * | 2020-07-08 | 2020-09-22 | 中国石油天然气集团有限公司 | High-pressure energy-storage time-delay opening type toe end sliding sleeve and using method thereof |
| CN112049606A (en) * | 2020-09-30 | 2020-12-08 | 中国石油天然气集团有限公司 | Time-delay opening toe end sliding sleeve and opening method thereof |
| CN112983353A (en) * | 2021-04-07 | 2021-06-18 | 中国石油天然气股份有限公司 | Well cementation sliding sleeve with pressure compensation structure |
| CN113530508A (en) * | 2020-04-15 | 2021-10-22 | 中国石油天然气股份有限公司 | Time-delay sliding sleeve |
| CN113914819A (en) * | 2021-09-30 | 2022-01-11 | 荆州市赛瑞能源技术有限公司 | Hydraulic sliding sleeve for fracturing |
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| CN110541687A (en) * | 2019-09-23 | 2019-12-06 | 中国石油集团川庆钻探工程有限公司 | Toe end sliding sleeve capable of controlled delay opening |
| CN110541687B (en) * | 2019-09-23 | 2024-03-22 | 中国石油集团川庆钻探工程有限公司 | Toe end sliding sleeve capable of being opened in controlled time delay manner |
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| CN112049606B (en) * | 2020-09-30 | 2024-02-06 | 中国石油天然气集团有限公司 | Time-delay opening toe end sliding sleeve and opening method thereof |
| CN112983353A (en) * | 2021-04-07 | 2021-06-18 | 中国石油天然气股份有限公司 | Well cementation sliding sleeve with pressure compensation structure |
| CN112983353B (en) * | 2021-04-07 | 2023-03-10 | 中国石油天然气股份有限公司 | Well cementation sliding sleeve with pressure compensation structure |
| CN113914819A (en) * | 2021-09-30 | 2022-01-11 | 荆州市赛瑞能源技术有限公司 | Hydraulic sliding sleeve for fracturing |
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