CN106639965B - A kind of enclosed expanding self solves sealed packer - Google Patents
A kind of enclosed expanding self solves sealed packer Download PDFInfo
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- CN106639965B CN106639965B CN201611101353.6A CN201611101353A CN106639965B CN 106639965 B CN106639965 B CN 106639965B CN 201611101353 A CN201611101353 A CN 201611101353A CN 106639965 B CN106639965 B CN 106639965B
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- annular groove
- liquid flow
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- mounting hole
- flow hole
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- 239000007788 liquid Substances 0.000 claims abstract description 67
- 239000012530 fluid Substances 0.000 claims abstract description 46
- 238000012856 packing Methods 0.000 claims abstract description 20
- 238000004090 dissolution Methods 0.000 claims description 42
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000002195 soluble material Substances 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 3
- PGTXKIZLOWULDJ-UHFFFAOYSA-N [Mg].[Zn] Chemical compound [Mg].[Zn] PGTXKIZLOWULDJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims 1
- 238000010008 shearing Methods 0.000 claims 1
- 239000004576 sand Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- GANNOFFDYMSBSZ-UHFFFAOYSA-N [AlH3].[Mg] Chemical compound [AlH3].[Mg] GANNOFFDYMSBSZ-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000011218 segmentation 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
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
-
- 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
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
The present invention provides a kind of enclosed expandings to self solve sealed packer, comprising: cylinder, with inner cavity, the lateral wall of cylinder is concavely provided with annular groove, at least one mounting hole for being connected to and being located at below annular groove with annular groove is offered in the side wall of cylinder, the inner sidewall of cylinder is concavely provided with the liquid flow hole being connected to mounting hole；Packing element, is embedded in annular groove and the notch of closed ring groove, packing element can after fluid flows into annular groove via mounting hole from liquid flow hole radial dilatation, and can be withdrawn after liquid flow hole outflow in the fluid in annular groove via mounting hole；Cock is mounted in mounting hole, controls the connection and disconnection between liquid flow hole and annular groove by cock；Inner sliding sleeve can slidably wear in the cavity of the barrel and can block or open liquid flow hole by sliding axially.The present invention does not unseal immediately after the completion of pressure break, to avoid the layer of altering between interval after pressure, and can unseal automatically when needing to unseal, in order to take out fracturing string.
Description
Technical field
The present invention relates to a kind of packer, especially a kind of enclosed expanding self solves sealed packer.
Background technique
The transformation of packer staged fracturing is to realize one of important technology that hyposmosis, fine and close oil-gas reservoir are effectively employed in managing,
It is with strong points with fractured interval, the continuous feature of fracturing process.The refracturing of especially old well, packer segmentation in casing
Transformation is unique technological means.
Packer staged fracturing in casing, packer are the cores of the technology, to meet seal live, rise obtain want substantially
It asks.Existing inflatable packer, the mode of setting are, when the internal pressure of oil pipe is higher than oil pipe external pressure, packer setting, when
Removing seal for packer when oily overpressure is equal with external pressure has two with the fracturing string that this packer forms:
First is that packer must sanding machine be mating could use with throttling, make packer holding seat by the chock pressure difference for the sanding machine that throttles
Envelope, fracturing fluid damage casing since throttling action generates very high flow velocity；Second is that packer is immediately after having pressed one section
Deblocking, does not have buffer action to the interval pressed, if the pressure value difference of two intervals pressed is big, can exist and alter
Layer, o exterior can be deposited in by returning the fracturing sand spat, and cause to take out fracturing string difficulty, the especially staged fracturing of horizontal well,
Problem can be protruded more.
Summary of the invention
The object of the present invention is to provide a kind of enclosed expandings to self solve sealed packer, does not solve immediately after the completion of pressure break
Envelope, alters layer to avoid between interval after pressure, can unseal automatically when needing to unseal, in order to take out fracturing string.
In order to achieve the above objectives, the present invention proposes that a kind of enclosed expanding self solves sealed packer comprising: cylinder has
Axially disposed inner cavity, the lateral wall of the cylinder are concavely provided with annular groove, offer at least in the side wall of the cylinder
One mounting hole for being connected to and being located at below the annular groove with the annular groove, the inner sidewall of the cylinder are concavely provided with
The liquid flow hole being connected to the mounting hole；Packing element is embedded in the annular groove, and closes the notch of the annular groove,
The packing element can after fluid flows into the annular groove via the mounting hole from the liquid flow hole radial dilatation, and can be in institute
The fluid stated in annular groove is withdrawn after liquid flow hole outflow via the mounting hole；Cock is mounted on the peace
It fills in hole, the connection and disconnection between the liquid flow hole and the annular groove is controlled by the cock；Inner sliding sleeve, energy
It is axially slidably threaded through in the inner cavity of the cylinder, and the liquid flow hole can be blocked or opened by sliding axially.
Enclosed expanding as described above self solves sealed packer, wherein the cylinder includes: top connection, the top connection
Lateral wall on have ring-shaped step；First sleeve, the upper end are socketed in the lower end outside of the top connection, and the mounting hole is opened
It is located in the side wall on the first sleeve top, the liquid flow hole is recessed on the inner sidewall of the first sleeve, the interior cunning
It is set in the inside of the first sleeve；Second sleeve is socketed in outside the first sleeve, the top of the second sleeve with
The annular groove, the inner sidewall on the second sleeve top and the top connection are surrounded between the ring-shaped step of the top connection
Lateral wall between form fluid course, the mounting hole is connected to by the fluid course with the annular groove.
Enclosed expanding as described above self solves sealed packer, wherein the cock includes control fluid from described
Liquid flow hole dissolves valve, the mounting hole to the check valve of the annular groove one-way flow and made of soluble material
For two or more, and the dissolution valve and the check valve are respectively arranged in the different mounting holes, and the dissolution valve can be
The fluid outflow in the annular groove is prevented before dissolution, and can allow the fluid in the annular groove via institute upon dissolution
The mounting hole where stating dissolution valve is flowed out from the liquid flow hole.
Enclosed expanding as described above self solves sealed packer, wherein the dissolution valve is made of soluble material
Check valve.
Enclosed expanding as described above self solves sealed packer, wherein the dissolution valve to be made of soluble material and
The closeouts of the mounting hole can be blocked.
Enclosed expanding as described above self solves sealed packer, wherein the dissolution valve is by magnesium-aluminium alloy material or magnesium zinc
Alloy material is made.
Enclosed expanding as described above self solves sealed packer, wherein the cock of soluble material by being made
One-way valve structures, the cock can control fluid from the liquid flow hole to the annular groove one-way flow before dissolution
It is dynamic, and the fluid in the annular groove can be allowed to flow out via the mounting hole from the liquid flow hole upon dissolution.
Enclosed expanding as described above self solves sealed packer, wherein the inner sliding sleeve passes through shear pin and the cylinder
The side wall of body connects, and the inner sliding sleeve blocks the liquid flow hole, and the inner sliding sleeve has the ball socket structure set for steel ball, leads to
Cross into the inner cavity of the cylinder pitching and suppress the driving inner sliding sleeve and cut the shear pin and towards lower slider, it is described in
It slides through towards lower slider and opens the liquid flow hole.
Enclosed expanding as described above self solves sealed packer, wherein the ball socket structure is spring detent, the spring detent
Positioned at the bottom end of the inner sliding sleeve, the spring detent opens after capable of skidding off the cylinder downwards and discharges the steel ball.
Enclosed expanding as described above self solves sealed packer, wherein it is also connected with lower contact below the cylinder, it is described
Lower contact is connected to the inner cavity of the cylinder, and the internal diameter of the lower contact is greater than the internal diameter of the cylinder.
The characteristics of enclosed expanding of the invention self solves sealed packer and advantage are:
1, enclosed expanding of the invention self solves sealed packer, controls setting and unsealing for packer by cock,
Safety is set, compared with existing packer, the chock pressure difference holding independent of sanding machine sets state, is pressing corresponding interval
Afterwards, it will not be unsealed immediately because losing chock pressure difference, and be to continue with and the interval pressed is isolated, avoided after pressure break between interval
Layer and card sand are altered, the taking-up of fracturing string is conducive to, packer is automatic to unseal after cock opening, that is, can be taken off pressure break
Tubing string；
2, enclosed expanding of the invention self solves sealed packer, using check valve and dissolution valve as cock, structure
Simply, at low cost, it is not necessarily to manual control, securely and reliably；
3, enclosed expanding of the invention self solves sealed packer, and structure is simple, easy to operate, can replace conventional expansion formula
Packer reduces the risk of sand card during underground work.
Detailed description of the invention
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein:
Fig. 1 is the schematic diagram of one embodiment that enclosed expanding of the invention self solves sealed packer；
Fig. 2 is that the enclosed expanding of Fig. 1 self solves schematic diagram of the sealed packer after pitching；
Fig. 3 is that the enclosed expanding of Fig. 1 self solves the schematic diagram that sealed packer is in the state that sets；
Fig. 4 is the schematic diagram for another embodiment that enclosed expanding of the invention self solves sealed packer.
Main element label declaration:
1 top connection
11 annular groove, 12 ring-shaped step
2 packing elements
3 cocks
31 check valves 32 dissolve valve
4 inner sliding sleeves
41 ball socket structures
5 first sleeves
51 liquid flow hole, 52 mounting hole
53 shear pins
6 second sleeves
61 fluid course, 62 fixing pin
7 lower contacts
8 steel balls
9 casings
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed
Bright specific embodiment.
As shown in Figure 1, Figure 3, the present invention provides a kind of enclosed expanding and self solves sealed packer comprising cylinder, packing element 2,
Cock 3 and inner sliding sleeve 4, cylinder have axially disposed inner cavity, and the lateral wall of cylinder is concavely provided with annular groove 11, cylinder
At least one mounting hole 52 for being connected to annular groove 11 and being located at 11 lower section of annular groove, mounting hole are offered in the side wall of body
52 are for example arranged in parallel with the inner cavity of cylinder, that is, mounting hole 52 is provided in the side wall of the first cylinder along axial (longitudinal direction),
The inner sidewall of cylinder is concavely provided with the liquid flow hole 51 being connected to mounting hole 52, that is, liquid flow hole 51 radially (transverse direction) is provided with
On the inner sidewall of first cylinder, liquid flow hole 51 is located at 52 lower section of mounting hole；
Packing element 2 is embedded in annular groove 11, and the notch of closed ring groove 11, and packing element 2 can be in fluid from liquid flow hole
51 via radial dilatation (being radially expanded) after the inflow annular groove 11 of mounting hole 52, and is close to casing 9, to seal oil jacket annulus,
Make packer setting, and annular groove can be withdrawn after the outflow of liquid flow hole 51 via mounting hole 52 in the fluid in annular groove 11
In 11, make removing seal for packer, and can make on packing element 2 to be not in desilting；
Cock 3 is mounted in mounting hole 52, and the connection of liquid flow hole 51 and annular groove 11 is controlled by cock 3
And disconnection, i.e., after cock 3 is opened, fluid can flow into annular groove 11, make packer setting, when cock 3 is closed
Afterwards, can by fluid block in annular groove 11, make packer holding set state, will not unseal immediately, when cock 3 again
After secondary opening, the fluid in annular groove 11 can flow out, and unseal packer automatically；
Inner sliding sleeve 4 can axially slidably be worn in the cavity of the barrel, and can block or open liquid stream by sliding axially
Hole 51, when packer does not need to set, liquid flow hole 51 is blocked and is closed by inner sliding sleeve 4, when packer needs to set, passes through cunning
Dynamic inner sliding sleeve 4 opens liquid flow hole 51, enables fluid to enter in annular groove 11 via liquid flow hole 51.
Enclosed expanding of the invention self solves sealed packer, controls setting and unsealing for packer by cock, with
Existing packer is compared, and the chock pressure difference holding independent of sanding machine sets state, will not be because of section after having pressed corresponding interval
Drift angle disappearance unseals immediately, and is to continue with and the interval pressed is isolated, and avoids altering layer and pressure break between interval after pressure break
Sand, which returns, to be spat, and card sand is prevented, and packing element desilting will not occurs, is conducive to the taking-up of fracturing string, after cock opening,
Packer unseals automatically, that is, can be taken off fracturing string.
Again as shown in Figure 1, in a specific embodiment, cylinder includes top connection 1, first sleeve 5 and second sleeve 6,
There is ring-shaped step 12 on the lateral wall of top connection 1；The upper end of first sleeve 5 is socketed in the lower end outside of top connection 1, mounting hole
52 are provided in the side wall on 5 top of first sleeve, and liquid flow hole 51 is recessed on the inner sidewall of first sleeve 5,4 sealing shroud of inner sliding sleeve
It is located at the inside of first sleeve 5；
The sealing of second sleeve 6 is socketed in outside first sleeve 5, the ring-shaped step 12 of the top of second sleeve 6 and top connection 1 it
Between surround annular groove 11, i.e., the top of packing element 2 and ring-shaped step 12 are tightly connected, the bottom end of packing element 2 and the top of second sleeve 6
End face seal connection, forms fluid course 61, mounting hole between the inner sidewall on 6 top of second sleeve and the lateral wall of top connection 1
52 are connected to by fluid course 61 with annular groove 11.Wherein, second sleeve 6 and first sleeve 5 for example pass through fixing pin 62
Connection.
As shown in Figure 1, in a preferred embodiment, cock 3 includes control fluid from liquid flow hole 51 to annular
The check valve 31 of 11 one-way flow of groove and the dissolution valve 32 made of soluble material, mounting hole 52 are two or more, and
Circumferentially spaced arrangement, check valve 31 and dissolution valve 32 are respectively arranged in different mounting holes 52, and check valve 31 is commonly can not
The check valve of dissolution, dissolution valve 32 can prevent the fluid in annular groove 11 from flowing out before dissolution, and can allow ring upon dissolution
Fluid in connected in star 11 is flowed out via the mounting hole 52 where dissolution valve from liquid flow hole 51.Therefore, fluid can be from liquid flow hole 51
Enter in annular groove 11 via check valve 31, fluid course 61, check valve 31 and dissolution valve 32 prevent in annular groove 11
Fluid outflow, after dissolution valve 32 dissolves, fluid in annular groove 11 is via the installation where fluid course 61, dissolution valve 32
Hole 52 is flowed out from liquid flow hole 51, is unsealed packer automatically, is unsealed without the special unsealing tool of tripping in, and deblocking simply has
Effect.
Wherein, the quantity of check valve be more than one, dissolve valve quantity be more than one, check valve 31 and dissolution valve 32
Total quantity be equal to mounting hole 52 quantity.
In a feasible technical solution, dissolution valve 32 is the one-way valve structures made of soluble material, this is unidirectional
Valve arrangement controls fluid from liquid flow hole 51 to 11 one-way flow of annular groove.
In another feasible technical solution, dissolution valve 32 is that (closure) installation is made and can blocked of soluble material
The closeouts in hole 52, closeouts are in the form of a column, and are matched with the shape with mounting hole 52.
As shown in figure 4, in another preferred embodiment, cock 3 is the check valve made of soluble material
Structure, cock 3 can control fluid from liquid flow hole 51 to 11 one-way flow of annular groove before dissolution, and can permit upon dissolution
Perhaps the fluid in annular groove 11 is flowed out via mounting hole 52 from liquid flow hole 51.Before cock 3 dissolves, fluid can be from liquid flow hole
51 enter in annular groove 11 via cock 3, fluid course 61, and cock 3 prevents the fluid in annular groove 11
Outflow, after cock 3 dissolves, the fluid in annular groove 11 is flowed out via fluid course 61, mounting hole 52 from liquid flow hole 51.
Above-mentioned soluble material is, for example, magnesium-aluminium alloy material or magnesium-zinc alloy material, but the present invention not as
Limit, the material that can also be dissolved using other existing can react with well liquid.
After packer setting, cock 3 is impregnated by well liquid, by soluble material and well liquid react and in a timing
Between after dissolution, by calculate be completely dissolved the time, can determine the time of removing seal for packer.
In an embodiment as illustrated in figure 2, inner sliding sleeve 4 by the side wall of shear pin 53 (setting pin) and cylinder (i.e.
The side wall of first sleeve 5) can discretely it be connected, and inner sliding sleeve 4 blocks liquid flow hole 51, inner sliding sleeve 4, which has, to be set for steel ball 8
Ball socket structure 41 passes through pitching in the inner cavity to cylinder and suppresses driving inner sliding sleeve 4 and cuts shear pin 8 and towards lower slider, interior
Sliding sleeve 4 is connected to liquid flow hole 51 with the inner cavity of cylinder by opening liquid flow hole 51 towards lower slider.
Further, ball socket structure 41 is spring detent, and spring detent is located at the bottom end of inner sliding sleeve 4, and spring detent can be skidded off downwards
(being strutted by steel ball) is opened after cylinder under the action of axial compressive force and discharges steel ball.
In the present embodiment, it is also connected with lower contact 7 below cylinder, lower contact 7 is connected to the inner cavity of cylinder, lower contact 7
Upper-end inner diameter is greater than the internal diameter of cylinder, so that spring detent can open after sliding into lower contact 7, the bottom diameter of lower contact 7 is less than
The internal diameter of inner sliding sleeve 4, can be limited to the inner sliding sleeve 4 towards lower slider.Wherein, top connection 1 and lower contact 7 are provided with pipe spiral shell
Line can be connected with the other tools in oil field and tubing and casing.
For example, the outer diameter of packer is 110mm, casing 9 is 5 1/2 " casing, and the internal diameter of casing 9 is 121mm, packing
The internal diameter of the inner sliding sleeve 4 of device is 70mm.
It is as follows that enclosed expanding of the invention self solves the setting of sealed packer, deblocking process:
Packer setting: firstly, to a sealed steel ball is put into inside packer, steel ball falls into the inner sliding sleeve inside packer
On 4 ball socket structure 41, ball socket structure 41 is a spring detent structure, and under axial compressive force effect, spring detent can produce diameter
To expansion action；Continue to suppress to the inside of packer, shear pin 53 is cut, and inner sliding sleeve 4 exposes first sleeve towards lower slider
5 liquid flow hole 51, mounting hole 52 of the highly pressurised liquid through first sleeve 5, pushes check valve 31 open, enters annular via fluid course 61
Groove 11, since 2 internal pressure of packing element is greater than outer sleeve annular pressure, highly pressurised liquid pushes 2 radial dilatation of packing element, and is close to
9 inner wall of casing, completes setting for packer；
It when passing through check valve 31 due to liquid, can only enter, dissolution valve 32 can also play the role of shutting off, and work as packer
When internal pressure is less than external pressure, it also can guarantee that packer is set well, without unsealing immediately；When the bullet of inner sliding sleeve 4
When spring pawl is slided into lower contact 7 downward (at the radial annular space of lower contact 7), spring detent can be radially unfolded, and steel ball 8 moves downward
Leave inner sliding sleeve 4.
Removing seal for packer: after packer setting, since the material of dissolution valve 32 is impregnated by well liquid, valve 32 and well liquid are dissolved
It reacts and dissolves；Valve 32 is dissolved after limiting time dissolution, and mounting hole 52 is opened, referred to as pressure release passage, annular groove
Liquid in 11 is flowed out from liquid flow hole 51, and packing element 2 is withdrawn, removing seal for packer.
Verify enclosed expanding self-unsealing packer setting of the invention, deblocking laboratory operating procedures successively are as follows:
Pipeline is suppressed in connection: firstly, self solving to enclosed expanding, a diameter is put into inside sealed packer is, for example, 68mm's
Steel ball 8, and top connection 1 is linked together with pipeline is suppressed, it is suppressed；
Set: when pump pressure reaches 20MPa, shear pin 53 is cut, and 4 slide downward of inner sliding sleeve, steel ball 8 falls into packing
The lower part of device.Packer is firmly drawn from inside to outside from casing 9, packer is motionless, it was demonstrated that the packing element 2 of packer is swollen to be enclosed in casing 9
On inner wall, packer, which has been set, to be finished；
Deblocking: due to being impregnated inside packer by liquid (liquid taken out by oil field well), every 2 hours, envelope is checked
Whether unsealed every device；It after 48 hours, wriggles when pulling out packer, takes out packer, check the dissolution valve of packer
All dissolutions, illustrate that packer can be unsealed smoothly.
The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the invention.It is any
Those skilled in the art, under the premise of not departing from design and the principle of the present invention made by equivalent changes and modifications, should all
Belong to the scope of protection of the invention.And it should be noted that each component part of the invention is not limited in above-mentioned entirety answers
With, each technical characteristic described in specification of the invention can select according to actual needs one individually use or select it is multinomial
Combine use, and therefore, the present invention covers other combinations related with this case inventive point and concrete application in the nature of things.
Claims (10)
1. a kind of enclosed expanding self solves sealed packer, which is characterized in that the enclosed expanding self solves sealed packer and includes:
Cylinder, has axially disposed inner cavity, and the lateral wall of the cylinder is concavely provided with annular groove, the side wall of the cylinder
Inside offer it is more than two be connected to the annular groove and the mounting holes below the annular groove, the cylinder it is interior
Side wall is concavely provided with the liquid flow hole being connected to the mounting hole；
Packing element is embedded in the annular groove, and closes the notch of the annular groove, and the packing element can be in fluid from described
Liquid flow hole flows into radial dilatation after the annular groove via the mounting hole, and can the fluid in the annular groove via
The mounting hole is withdrawn after liquid flow hole outflow；
Cock, installation control the liquid flow hole and the annular groove in the mounting hole, by the cock
Between connection and disconnection；
Inner sliding sleeve can be axially slidably threaded through in the inner cavity of the cylinder, and can by slide axially block or open it is described
Liquid flow hole.
2. enclosed expanding as described in claim 1 self solves sealed packer, which is characterized in that the cylinder includes:
Top connection has ring-shaped step on the lateral wall of the top connection；
First sleeve, the upper end are socketed in the lower end outside of the top connection, and the mounting hole is provided with the first sleeve top
In the side wall at end, the liquid flow hole is recessed on the inner sidewall of the first sleeve, and the inner sliding sleeve is set in the first set
The inside of cylinder；
Second sleeve is socketed in outside the first sleeve, the ring-shaped step of the top of the second sleeve and the top connection it
Between surround the annular groove, it is logical that liquid stream is formed between the inner sidewall on the second sleeve top and the lateral wall of the top connection
Road, the mounting hole are connected to by the fluid course with the annular groove.
3. enclosed expanding as described in claim 1 self solves sealed packer, which is characterized in that the cock includes control
Fluid dissolves valve from the liquid flow hole to the check valve of the annular groove one-way flow and made of soluble material,
The mounting hole is two or more, and the check valve and the dissolution valve are respectively arranged in the different mounting holes, described
Dissolution valve can prevent the fluid in the annular groove from flowing out before dissolution, and can allow upon dissolution in the annular groove
Fluid is flowed out via the mounting hole where the dissolution valve from the liquid flow hole.
4. enclosed expanding as claimed in claim 3 self solves sealed packer, which is characterized in that the dissolution valve is by can dissolve
Check valve made of material.
5. enclosed expanding as claimed in claim 3 self solves sealed packer, which is characterized in that the dissolution valve is by can dissolve
Material is made and can block the column closeouts of the mounting hole.
6. enclosed expanding as claimed in claim 3 self solves sealed packer, which is characterized in that the dissolution valve is by magnesium alloy
Material or magnesium-zinc alloy material are made.
7. enclosed expanding as described in claim 1 self solves sealed packer, which is characterized in that the cock is by solvable
One-way valve structures made of material are solved, it is recessed from the liquid flow hole to the annular that the cock can control fluid before dissolution
Slot one-way flow, and fluid in the annular groove can be allowed via the mounting hole from the liquid flow hole stream upon dissolution
Out.
8. enclosed expanding as described in any one of claim 1 to 7 self solves sealed packer, which is characterized in that the inner sliding sleeve
It is connect by shear pin with the side wall of the cylinder, and the inner sliding sleeve blocks the liquid flow hole, the inner sliding sleeve, which has, to be supplied
The ball socket structure that steel ball is set passes through the pitching into the inner cavity of the cylinder and suppresses the driving inner sliding sleeve and cuts the shearing
Pin and towards lower slider, the inner sliding sleeve is by opening the liquid flow hole towards lower slider.
9. enclosed expanding as claimed in claim 8 self solves sealed packer, which is characterized in that the ball socket structure is spring
Pawl, the spring detent are located at the bottom end of the inner sliding sleeve, and the spring detent is opened and discharged after capable of skidding off the cylinder downwards
The steel ball.
10. enclosed expanding as claimed in claim 8 self solves sealed packer, which is characterized in that be also connected with below the cylinder
There is lower contact, the lower contact is connected to the inner cavity of the cylinder, and the internal diameter of the lower contact is greater than the internal diameter of the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611101353.6A CN106639965B (en) | 2016-12-02 | 2016-12-02 | A kind of enclosed expanding self solves sealed packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611101353.6A CN106639965B (en) | 2016-12-02 | 2016-12-02 | A kind of enclosed expanding self solves sealed packer |
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| Publication Number | Publication Date |
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| CN106639965A CN106639965A (en) | 2017-05-10 |
| CN106639965B true CN106639965B (en) | 2019-04-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109538182A (en) * | 2018-11-19 | 2019-03-29 | 中国石油集团渤海钻探工程有限公司 | It is a kind of without the self-service deblocking packer of throttling |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000075482A1 (en) * | 1999-06-07 | 2000-12-14 | Grant Prideco, Inc. | Sliding sleeve assembly for subsurface flow control |
| CN102094591A (en) * | 2011-03-15 | 2011-06-15 | 东营市兆鑫工贸有限责任公司 | Fracturing packer for barefoot well |
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| WO2000075482A1 (en) * | 1999-06-07 | 2000-12-14 | Grant Prideco, Inc. | Sliding sleeve assembly for subsurface flow control |
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| CN106639965A (en) | 2017-05-10 |
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