CN107100582A - A kind of hydrostatic pressure sets type fracturing packer - Google Patents
A kind of hydrostatic pressure sets type fracturing packer Download PDFInfo
- Publication number
- CN107100582A CN107100582A CN201610122560.3A CN201610122560A CN107100582A CN 107100582 A CN107100582 A CN 107100582A CN 201610122560 A CN201610122560 A CN 201610122560A CN 107100582 A CN107100582 A CN 107100582A
- Authority
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- China
- Prior art keywords
- sliding sleeve
- packer
- center pipe
- pin
- air chamber
- 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.)
- Pending
Links
- 230000002706 hydrostatic effect Effects 0.000 title claims abstract description 15
- 238000012856 packing Methods 0.000 claims abstract description 19
- 125000006850 spacer group Chemical group 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 10
- 238000005488 sandblasting Methods 0.000 abstract description 9
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000006837 decompression Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 210000000664 rectum Anatomy 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009423 ventilation Methods 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of hydrostatic pressure sets type fracturing packer, contains top connection, packing element, spacer ring, pin, ball seat sliding sleeve, air chamber, its center pipe, power sliding sleeve, hydraulic cavities, sealing ring, lower contact.The packer is interrupted after pin realizes and set, packer does not need ground installation supercharging to maintain to set state, is realized and set by the pressure difference between air chamber and hydraulic cavities, even if hydrostatic pressure is set in pressure using easier.The packer pressure difference sets structure, and the area of passage of the sanding machine to matching does not limit requirement, it is possible to achieve the maximization flow for being equal to latus rectum in tubing string of sandblasting amount, is not required to sanding machine throttling to provide pressure difference.Thus, the packer can provide possibility for sanding machine huge discharge sandblasting, improve sandblasting efficiency.Packer decompression is convenient, similar to the corresponding solution blocking of pitching sanding machine input, cuts pin, air chamber is no longer sealed, packing element loses squeezing action power, resilience is restored.
Description
Technical field
The present invention relates to oil drilling and r eoovery machine equipment, particularly a kind of hydrostatic pressure sets type fracturing packer.
Background technology
Since reform and opening-up, national economy obtains rapid growth, and " scientific and technical innovation, autonomous innovation " has turned into current domestic industry and sent out
The main flow of exhibition, China's industry just progressively develops to the direction of intensive style, energy-saving and emission-reduction, low-carbon.Oil is China's modern industry hair
" blood " and the economic lifeline of exhibition, are a kind of important strategic resources, influence the stability and security of national energy.Oil exploitation
In, oil well passes through long-term production, and the organic matter of reservoir fluid is precipitated and shaked out, and necessarily causes blocking up for the reservoir pore space near shaft bottom
Plug, causes porosity and permeability to decline, influences oil well yield.Therefore the later stage is exploited in oil well, frequently with pressure break acid
Change is handled, to change low yield state.Insulated above and below needing to carry out related stratum with packer in fracture acidizing operating tool string,
Carry out the corresponding oil reservoir of fracture acidizing.At present, using fracturing packer according to the mode of setting can be roughly divided into expanded type and it is mechanical this two
Kind.Inflatable packer mainly realizes setting for packer by tubing string inside and outside differential pressure, and shortcoming is to maintain packer in tubing string
The state of setting needs ground installation pressurization maintenance, when tubing string is transferred, the easily premature setting caused by borehole pressure is fluctuated, and to propose
High inner tube column pressure supports the use the operating efficiency for reducing tubing string using throttling sanding machine.Mechanical packer, possesses and sets
Stable, slips structure, which is fixed on the borehole wall, to be slided, but decompression is cumbersome, and the deposition for setting sand grains in rear well easily unseals mistake
Lose, higher is required to operation, capacity rate mistake is low.Apply for two before this department specially, Patent No.：201420129567.4, name
Claim：A kind of new fracturing packer, the not anti-seating and sealing unit of the packer, easy premature setting；Application No.：
20151029178.2, un-throttled sets Y344 type fracturing packers, and setting for it is provided by ground installation into operating tool string
Pressure is simultaneously maintained, it is necessary to which operating personnel are higher to operating personnel's requirement according to being finely adjusted using bottom depth to spring.To understand
Certainly above mentioned problem, the scientific and technical personnel of R＆D institution constantly research and discovery, researches and develops new-type fracturing packer, although technically
Make some progress, but the technical barrier not yet overcome is remained in practice.
The content of the invention
It is an object of the invention to overcome above deficiency there is provided a kind of hydrostatic pressure to set type fracturing packer.In the packer
There is seal gas chamber in portion and connects the hydraulic cavities of central tube, is pressurized by ground installation, and the pressure difference increased between them cuts power
Pin on sliding sleeve, realization sets and voluntarily maintains this state, it is no longer necessary to which ground installation provides pressure support ventilation；On power sliding sleeve
Pin avoid below packer during unseal in advance.Pin on ball seat sliding sleeve is interrupted by stuff, eliminate two chambers it
Between pressure difference, it is easy to operate.
The technical solution adopted for the present invention to solve the technical problems is：Slided containing top connection, packing element, spacer ring, pin, ball seat
Set, air chamber, its center pipe, power sliding sleeve, hydraulic cavities, sealing ring, lower contact, top connection outer wall is provided with three groups of packing elements
And spacer ring, under connect its center pipe, its center pipe outer wall is raised provided with a circle, and ball seat sliding sleeve, ball are provided with its center pipe
Seat sliding sleeve is fixedly connected with its center pipe by pin, and two groups of sealings are respectively equipped with the ball seat sliding sleeve groove of both sides up and down of pin
Circle, the dynamic sliding sleeve of its center pipe peripheral hardware, power sliding sleeve upper end is touched with spacer ring, and lower end is placed on the boss of lower contact, is moved
Power sliding sleeve is fixedly connected with its center pipe by pin, and its center pipe has lower contact, and lower contact is provided with infiltration slot,
Hydraulic cavities are surrounded by lower contact, its center pipe and power sliding sleeve, and to seep water, slot is connected with central tube, and air chamber is by sliding block
Central tube, power sliding sleeve and pin surround closed cavity, and equal, the air chamber of external diameter holding of external diameter and the hydraulic cavities of air chamber
Internal diameter also keep equal with the internal diameter of hydraulic cavities, constitute a kind of hydrostatic pressure and set type fracturing packer.
Above-mentioned its center inside pipe wall has provided with the raised boss of a circle, and boss protrusion length is more than or equal to ball seat sliding sleeve wall thickness.
The technical principle that the present invention is used is：Formed using machinery and Pneumatic hydraulic principle design, with air and water both media
Physical property difference, i.e. water universal pilot performance and low compression ratio, the high compression ratio physical characteristic of air.Liquid passes through
Slot injection hydraulic cavities in lower contact, when liquid is pressurized in central tube, generation pressure difference exceedes between hydraulic cavities and air chamber
The maximum of pin bears break pin nail during the upper limit on power sliding sleeve, and air chamber forced compression, power sliding sleeve is moved to air chamber side,
Packing element is promoted, packing element is expanded by axial force extruding radial, the annular space between closing oil pipe and sleeve pipe, play packing effect；
Ground installation termination of pumping, not repressurization, power sliding sleeve loses the power of ground application, but still by the hydrostatic corresponding with well depth
The influence of pressure, keeps the state set, and plays the effect of setting.After construction is completed, instrument still in setting state, but
In in centre passage maintain connection up and down between sleeve pipe.Instrument can be placed on underground for a long time, voluntarily set, long-term to separate oil pipe and set
Space between pipe.When needing to take out, the steel ball of correspondingly-sized is put into, is built the pressure, cut ball seat sliding sleeve and its center
Pin between pipe, communicates the space in air chamber and its center pipe, eliminates the pressure difference between air chamber and hydraulic cavities, moves
Power sliding block loses the active force of driving packing element, and packing element automatic rebounding realizes the deblocking of packer.Provided with a circle in its center pipe
Raised boss, to stop that pipe includes impact of the sand liquid to ball seat sliding sleeve during work, it is to avoid when flow velocity is higher, impulsive force is interrupted
Pin on ball seat sliding sleeve, is voluntarily unsealed.
The beneficial effects of the invention are as follows：The packer is interrupted after pin realizes and set, packer is not in pressure using easier
Need ground installation supercharging to maintain to set state, realized and set by the pressure difference between air chamber and hydraulic cavities, even if hydrostatic pressing
Power is set.The packer pressure difference sets structure, and the area of passage of the sanding machine to matching does not limit requirement, it is possible to achieve spray
The maximization flow for being equal to latus rectum in tubing string of sand amount, is not required to sanding machine throttling to provide pressure difference.Thus, the packer can be
The sandblasting of sanding machine huge discharge provides possible, raising sandblasting efficiency.Packer decompression is convenient, is put into similar to pitching sanding machine
Corresponding solution blocking, cuts pin, air chamber is no longer sealed, and packing element loses squeezing action power, and resilience is restored.
Figure of description
Here is that the present invention is further described in conjunction with the accompanying drawings and embodiments：
Fig. 1 is the half-sectional structural representation that a kind of hydrostatic pressure sets type fracturing packer；
In Fig. 1：1. top connection, 2. packing elements, 3. spacer rings, 4. pins, 5. ball seat sliding sleeves, 6. air chambers, 7. its center pipes,
8. power sliding sleeve, 9. hydraulic cavities, 10. sealing rings, 11. lower contacts,
Embodiment
In Fig. 1, the outer wall of top connection 1 be provided with three groups of packing elements 2 and spacer ring 3, under connect its center pipe 7, the outer wall of its center pipe 7
It is raised provided with a circle, ball seat sliding sleeve 5 is provided with its center pipe 7, ball seat sliding sleeve 5 is solid by pin 4 with its center pipe 7
Two groups of sealing rings 10 are respectively equipped with fixed connection, the ball seat sliding sleeve groove of both sides up and down of pin 4, its center pipe 7 is externally provided with dynamic
Power sliding sleeve 8, the upper end of power sliding sleeve 8 is touched with spacer ring 3, and lower end is placed on the boss of lower contact 11, power sliding sleeve 8 and sliding block
Central tube 7 is fixedly connected by pin 4, and its center pipe 7 has lower contact 11, and lower contact 11 is provided with infiltration slot,
Hydraulic cavities 9 are surrounded by lower contact 11, its center pipe 7 and power sliding sleeve 8, with the slot that seeps water with being connected in its center pipe 7
Logical, air chamber 6 surrounds closed cavity, the external diameter and hydraulic cavities of air chamber by its center pipe 7, power sliding sleeve 8 and pin 4
External diameter keep equal, the internal diameter of air chamber also keeps equal with the internal diameter of hydraulic cavities, constitutes a kind of hydrostatic pressure and sets type pressure break
Packer.
The above-mentioned inwall of its center pipe 7 has provided with the raised boss of a circle, and boss protrusion length is more than or equal to ball seat sliding sleeve wall thickness.
The packer is formed using machinery and Pneumatic hydraulic principle design, with the difference of the physical property of air and water both media,
That is the universal pilot performance and low compression ratio of water, the high compression ratio physical characteristic of air.Liquid is injected by the slot in lower contact
Hydraulic cavities, produce pressure difference more than pin on power sliding sleeve when liquid is pressurized in central tube, between hydraulic cavities 9 and air chamber 6
4 maximum is born break pin during the upper limit and followed closely, and air chamber forced compression, power sliding sleeve is moved to air chamber side, promotes packing element,
Packing element is expanded by axial force extruding radial, the annular space between closing oil pipe and sleeve pipe, plays packing effect；Ground installation
Termination of pumping, not repressurization, power sliding sleeve 8 loses the power of ground application, but still by the hydrostatic pressure corresponding with well depth
Influence, keeps the state set, and plays the effect of setting.When complete construction after, instrument still in the state that sets, but in entreat
Passage maintains the connection up and down between sleeve pipe.Instrument can be placed on underground for a long time, voluntarily set, long-term to separate between oil pipe and sleeve pipe
Space.When needing to take out, the steel ball of correspondingly-sized is put into, is built the pressure, cut between ball seat sliding sleeve and its center pipe
Pin, communicate the space in air chamber 6 and its center pipe 7, eliminate the pressure difference between air chamber 6 and hydraulic cavities 9,
Power sliding block loses the active force of driving packing element, and packing element automatic rebounding realizes the deblocking of packer.It is provided with its center pipe 7
The raised boss of one circle, to stop that pipe includes impact of the sand liquid to ball seat sliding sleeve during work, it is to avoid when flow velocity is higher, impulsive force
The pin on ball seat sliding sleeve is interrupted, is voluntarily unsealed.
The packer is interrupted after pin realizes and set, packer does not need ground installation supercharging to tie up in pressure using easier
The state of setting is held, is realized and set by the pressure difference between air chamber and hydraulic cavities, even if hydrostatic pressure is set.Using such a pressure
Difference sets mode, the area of passage of the sanding machine to matching does not limit requirement, it is possible to achieve sandblasting amount is equal in tubing string
The maximization flow of latus rectum, is not required to sanding machine throttling to provide pressure difference, thus, the packer can carry for sanding machine huge discharge sandblasting
Supply possible, improved sandblasting efficiency.Packer decompression is more convenient, similar to the corresponding solution blocking of pitching sanding machine input, cuts
Disconnected pin, air chamber is not in sealing, and packing element loses squeezing action power, and resilience is restored.Packer itself realizes the logical of maximum diameter
Sand amount, because leading to the increase of sand amount, reduces the frictional resistance of tool interior, reduces the abrasion of each component in tubing string, prolong
The service life of long instrument, improves safety in utilization, improves operating efficiency and construction quality.Above all using nothing
Under throttle base seal mode, break through existing 6 cubic metres of discharge capacities per minute limitation, can be achieved multilayer sandblasting up to 10 cubic metres per minute with
On high flow rate operation, implement pressing crack construction maximizing the benefits, and without ground installation support in the case of, realization is set.
Claims (2)
1. a kind of hydrostatic pressure sets type fracturing packer, contain top connection, packing element, spacer ring, pin, ball seat sliding sleeve, air
Chamber, its center pipe, power sliding sleeve, hydraulic cavities, sealing ring, lower contact, it is characterized in that：Top connection outer wall is provided with three groups of glue
Cylinder and spacer ring, under connect its center pipe, its center pipe outer wall is raised provided with a circle, and ball seat sliding sleeve is provided with its center pipe,
Ball seat sliding sleeve is fixedly connected with its center pipe by pin, be respectively equipped with the ball seat sliding sleeve groove of both sides up and down of pin two groups it is close
Seal, the dynamic sliding sleeve of its center pipe peripheral hardware, power sliding sleeve upper end is touched with spacer ring, and lower end is placed on the boss of lower contact,
Power sliding sleeve is fixedly connected with its center pipe by pin, and its center pipe has lower contact, and lower contact is cut provided with infiltration
Seam, hydraulic cavities surround by lower contact, its center pipe and power sliding sleeve, and to seep water, slot is connected with central tube, air chamber by
Its center pipe, power sliding sleeve and pin surround closed cavity, and the external diameter of air chamber and the external diameter holding of hydraulic cavities are equal, empty
The internal diameter of air cavity also keeps equal with the internal diameter of hydraulic cavities.
2. type fracturing packer is set according to a kind of hydrostatic pressure of claim 1, it is characterized in that：Above-mentioned its center inside pipe wall has
Provided with the boss that a circle is raised, boss protrusion length is more than or equal to ball seat sliding sleeve wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610122560.3A CN107100582A (en) | 2016-02-22 | 2016-02-22 | A kind of hydrostatic pressure sets type fracturing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610122560.3A CN107100582A (en) | 2016-02-22 | 2016-02-22 | A kind of hydrostatic pressure sets type fracturing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107100582A true CN107100582A (en) | 2017-08-29 |
Family
ID=59658531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610122560.3A Pending CN107100582A (en) | 2016-02-22 | 2016-02-22 | A kind of hydrostatic pressure sets type fracturing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107100582A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184614A (en) * | 2018-09-10 | 2019-01-11 | 中国石油天然气股份有限公司 | Packer, fracturing technology tubing string |
| CN113631794A (en) * | 2019-04-18 | 2021-11-09 | 哈利伯顿能源服务公司 | Anti-lift set for packer |
-
2016
- 2016-02-22 CN CN201610122560.3A patent/CN107100582A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109184614A (en) * | 2018-09-10 | 2019-01-11 | 中国石油天然气股份有限公司 | Packer, fracturing technology tubing string |
| CN113631794A (en) * | 2019-04-18 | 2021-11-09 | 哈利伯顿能源服务公司 | Anti-lift set for packer |
| CN113631794B (en) * | 2019-04-18 | 2023-10-20 | 哈利伯顿能源服务公司 | Anti-front setting for packer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170829 |
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| WD01 | Invention patent application deemed withdrawn after publication |