CN105401909B - Expanding packer and setting method thereof - Google Patents
Expanding packer and setting method thereof Download PDFInfo
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- CN105401909B CN105401909B CN201410415431.4A CN201410415431A CN105401909B CN 105401909 B CN105401909 B CN 105401909B CN 201410415431 A CN201410415431 A CN 201410415431A CN 105401909 B CN105401909 B CN 105401909B
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Abstract
The invention discloses an expansion packer and a setting method thereof, belonging to the technical field of oil exploitation. An expandable packer, comprising: the upper joint, the upper balancing hydraulic cylinder, the expanding rubber cylinder, the lower balancing hydraulic cylinder and the lower joint are sequentially sleeved outside the central pipe from top to bottom, the upper joint, the expanding rubber cylinder and the lower joint are respectively and fixedly connected with the central pipe, the upper joint is fixedly connected with the upper balancing hydraulic cylinder, and the upper balancing hydraulic cylinder and the lower balancing hydraulic cylinder are respectively and movably connected with the central pipe; the upper balance hydraulic cylinder comprises an upper cylinder sleeve and an upper cylinder group, and the upper cylinder sleeve is fixedly connected with the upper joint; the lower balancing hydraulic cylinder comprises a lower rubber cylinder group and a lower cylinder sleeve; liquid inlet holes are respectively arranged on the sleeving surfaces of the central tube and the upper balance hydraulic cylinder, the expanding rubber cylinder and the lower balance hydraulic cylinder, and the liquid inlet holes penetrate through the tube wall of the central tube. The hydraulic fracturing packer can solve the problem that the packer is easy to lose seal in the hydraulic fracturing process to cause economic loss, and achieves the effect of avoiding economic loss. The packer is used for setting the packer.
Description
Technical field
The present invention relates to technical field of petroleum extraction, more particularly to a kind of inflatable packer and its method is set.
Background technology
During oil exploitation, referred to using hydraulic fracturing technology transformation oil and gas reservoir：In oil and gas reservoir to be rebuilt
Upper manufacture of intraocular crack, man-made fracture is continuously injected into by liquid, and by waterpower generation pressure, the man-made fracture becomes much larger,
The solid particle of high intensity is carried by liquid again, and the solid particle is filled to man-made fracture, after construction terminates, by liquid
Anti- row, solid particle are stayed in crack, and the man-made fracture of preset area is formed on improved oil and gas reservoir, produce high circulation energy
The gas channel of power, and expand the seepage area of oil and gas reservoir.
It is existing, it is necessary to be the pressure to man-made fracture by setting Water power transform for packer in hydraulic fracturing technology
Some packers mainly have two kinds of compression packer and inflatable packer, wherein, inflatable packer mainly includes：Successively
Top connection, expanding packing element and the lower contact being socketed in outside central tube, in the set junction of the central tube and expanding packing element
It is provided with inlet opening.When transforming oil and gas reservoir using hydraulic fracturing technology, by the top connection of inflatable packer and fracturing string
Lower end is connected, and lower contact is connected with throttling sanding machine, is placed on inside pipe casing, the casing cement prolongs fracturing string in well
Extend the oil and gas reservoir above 10-20m (rice) place that underground distance need to be transformed, with pressure break pump truck into fracturing string pumping liquid,
Liquid is entered by the top connection of inflatable packer, then flows into throttling sanding machine from the lower contact of inflatable packer, still
Because the internal diameter of fracturing string is far longer than the inlet diameter of throttling sanding machine, so as in the formation pressure up and down of inflatable packer
Difference so that liquid is exerted a force by inlet opening to expanding packing element, when pressure difference reaches 1.2 1 1.5MPa (MPa), expanding glue
Cylinder produces radial direction deformation, when the external diameter of expanding packing element is with being somebody's turn to doCasing inner diameterWhen equal, inflatable packer to set process complete
Into.
But because the depth of oil-gas Layer is more and more deeper, the pressure difference formed up and down of inflatable packer is also increasing,
Because existing packer bears the limited in one's ability of pressure difference, the possible excessive deformation of expanding packing element, or wriggling is produced, therefore,
Easily occur packer during hydraulic fracturing and lose envelope phenomenon, cause economic loss.
The content of the invention
Envelope phenomenon is lost in order to solve easily to occur during hydraulic fracturing packer, the problem of causing economic loss,
The embodiments of the invention provide a kind of inflatable packer and its set method.The technical scheme is as follows：
On the one hand, there is provided a kind of inflatable packer, including：
Top connection, upper balance fluid cylinder, expanding packing element, lower balance fluid cylinder, central tube and lower contact；
The top connection, upper balance fluid cylinder, the expanding packing element, the lower balance fluid cylinder and the lower contact,
From top to bottom it is socketed in successively outside the central tube, wherein, the top connection, the expanding packing element and the lower contact point
Be not fixedly connected with the central tube, the top connection with it is described it is upper balance fluid cylinder be fixedly connected, the lower contact with it is described under
Balance fluid cylinder is fixedly connected, and the upper balance fluid cylinder and the lower balance fluid cylinder are flexibly connected with the central tube respectively；
The upper balance fluid cylinder includes upper cylinder sleeve and upper packing element group, and the upper cylinder sleeve is fixedly connected with the top connection, institute
State cylinder sleeve and the upper packing element group is from top to bottom socketed in outside the central tube successively；
The lower balance fluid cylinder includes lower rubber cylinder group and lower cylinder sleeve, and the lower cylinder sleeve is fixedly connected with the lower contact, institute
State lower rubber cylinder group and the lower cylinder sleeve is from top to bottom socketed in outside the central tube successively；
The central tube with it is described on balance fluid cylinder, the expanding packing element and it is described it is lower balance fluid cylinder set junction on
Inlet opening is respectively arranged with, the inlet opening runs through the tube wall of the central tube.
Optionally, the top connection includes small outer diameter section and big outer diameter section, and the external diameter of the big outer diameter section is more than described small
The external diameter of external diameter section；
The lower contact includes small outer diameter section and big outer diameter section, and the external diameter of the big outer diameter section is more than the small outer diameter section
External diameter；
The upper cylinder sleeve includes small internal diameter section and large diameter section, and the internal diameter of the large diameter section is more than the small internal diameter section
Internal diameter；
The lower cylinder sleeve includes small internal diameter section and large diameter section, and the internal diameter of the large diameter section is more than the small internal diameter section
Internal diameter；
Wherein, the large diameter section of the small outer diameter section of the top connection and the upper cylinder sleeve is socketed, the imperial palace of the lower cylinder sleeve
Footpath section and the small outer diameter section of the lower contact are socketed.
Optionally, the top connection is fixedly connected with the upper cylinder sleeve by the first shear pin, the axis of first shear pin
The small outer diameter section and the set junction of the large diameter section of the upper cylinder sleeve of the vertical top connection；
The lower cylinder sleeve is fixedly connected with the lower contact by the second shear pin, and the axis of second shear pin is vertically described
The large diameter section of lower cylinder sleeve and the set junction of the small outer diameter section of the lower contact.
Optionally, the socket place on the outer surface of the small outer diameter section of the top connection with the upper cylinder sleeve, is provided with first
Seal groove, the first sealing ring is provided with first seal groove；
Socket place on the inner surface of the small internal diameter section of the upper cylinder sleeve with the central tube, is provided with the second seal groove,
The second sealing ring is provided with second seal groove；
With the socket place of the lower cylinder sleeve on the outer surface of the small outer diameter section of the lower contact, the 3rd seal groove is provided with,
The 3rd sealing ring is provided with 3rd seal groove；
Socket place on the inner surface of the small internal diameter section of the lower cylinder sleeve with the central tube, is provided with the 4th seal groove,
The 4th sealing ring is provided with 4th seal groove.
Optionally, it is provided with external screw thread on the outer surface of the central tube；
The lower end of the top connection is provided with internal thread, and the top connection is consolidated with the central tube using thread connecting mode
Fixed connection；
The expanding packing element is provided with internal thread, and lower end and the central tube of the expanding packing element are connected by screw thread
The mode of connecing is fixedly connected；
The upper end of the lower contact is provided with internal thread, and the lower contact is consolidated with the central tube using thread connecting mode
Fixed connection.
Optionally, the inflatable packer, in addition to：
Back-up ring, the back-up ring are located between step surface and the lower rubber cylinder group of the central tube, are socketed in the center
Outside pipe, for stopping lower rubber cylinder group contact with the step surface, the step surface is the central tube and the expansion
Open the face parallel to the central tube radial direction that the external screw thread of formula packing element threaded connection place is formed.
Optionally, the inner chamber of the top connection, the central tube and the lower contact is interconnected, and internal diameter is equal.
On the other hand, there is provided a kind of inflatable packer sets method, for inflatable packer, the expanding envelope
Include every device：Top connection, upper balance fluid cylinder, expanding packing element, lower balance fluid cylinder, central tube and lower contact, the upper equilibrium liquid
Cylinder includes upper cylinder sleeve and upper packing element group, and the upper cylinder sleeve is fixedly connected with the top connection by the first shear pin, the upper cylinder sleeve
From top to bottom it is socketed in successively outside the central tube with the upper packing element group；The lower balance fluid cylinder includes lower rubber cylinder group with
Cylinder sleeve, the lower cylinder sleeve are fixedly connected with the lower contact by the second shear pin, and the lower rubber cylinder group and the lower cylinder sleeve are by upper
It is socketed in successively outside the central tube under；
Methods described includes：
Liquid is imported from top connection, exported from lower contact to throttling sanding machine, makes the upper and lower of the inflatable packer
Form pressure difference；
By liquid from the inner chamber of central tube be directed respectively into it is upper balance fluid cylinder, expanding packing element and it is lower balance fluid cylinder with it is described in
The cavity that heart pipe is formed, make the upper balance fluid cylinder, the expanding packing element and the lower balance fluid cylinder in the differential pressure action
Lower generation deformation；
After pressure difference is more than the first predetermined threshold value, the expanding packing element is set；
After pressure difference is more than the second predetermined threshold value, first shear pin is cut, and makes the upper cylinder sleeve and the top connection
Disconnection is fixedly connected with, the upper cylinder sleeve moves down, and compresses the upper packing element group, sets the upper packing element group；
After pressure difference is more than second predetermined threshold value, second shear pin is cut, make the lower cylinder sleeve with it is described under connect
Head is fixedly connected with disconnection, and the lower cylinder sleeve moves up, and compresses the lower rubber cylinder group, sets the lower rubber cylinder group；
Wherein, second predetermined threshold value is more than first predetermined threshold value.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
Due to inflatable packer provided in an embodiment of the present invention and its method is set, is provided with inflatable packer
Upper balance fluid cylinder and lower balance fluid cylinder, for power caused by the pressure difference up and down of balanced expansion formula packer, upper and lower balance fluid cylinder
After packing element group set, there is the annular space of center seal pipe and sleeve pipe formation and protect the double action of expanding packing element,
Compared to prior art, the ability that packer bears pressure difference is improved, so as to reduce the excessive deformation of expanding packing element and generation
The possibility of wriggling, therefore, it is possible to reduce hydraulic fracturing during simple rely on packer caused by expanding packing element to lose envelope
Phenomenon, avoid economic loss.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of structural representation of fracturing system provided in an embodiment of the present invention；
Fig. 2 is a kind of inflatable packer structural representation that prior art provides；
Fig. 3 is a kind of inflatable packer structural representation provided in an embodiment of the present invention；
Fig. 4 is another inflatable packer structural representation provided in an embodiment of the present invention；
Fig. 5 is a kind of part-structure schematic diagram of inflatable packer provided in an embodiment of the present invention；
Fig. 6 is the part-structure schematic diagram of another inflatable packer provided in an embodiment of the present invention；
Fig. 7 is the part-structure schematic diagram of another inflatable packer provided in an embodiment of the present invention；
Fig. 8 is that a kind of inflatable packer provided in an embodiment of the present invention sets method flow schematic diagram.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is illustrated that a kind of structural representation of fracturing system, and the fracturing system includes：Expanding insulates
Device 00, throttling sanding machine 01, fracturing string 02 and sleeve pipe 03, wherein, top connection and the fracturing string 02 of inflatable packer 00
Lower end is connected, and lower contact is connected with throttling sanding machine 01, and inflatable packer 00, throttling sanding machine 01 and fracturing string 02 are placed
Inside sleeve pipe 03, the sleeve pipe 03 is fixedly arranged in well.When carrying out hydraulic fracturing, fracturing string 02 is extended into underground distance needs
At the oil and gas reservoir above 10-20m of transformation, with pressure break pump truck, into fracturing string 02, pumping liquid, liquid are sealed by expanding
Enter every the top connection of device 00, then throttling sanding machine 01 is flowed into from the lower contact of inflatable packer 00, in inflatable packer
About 00 pressure difference formed so that inflatable packer 00 is set, and then is caused inside sleeve pipe 03, on inflatable packer 00,
Under space isolation.The liquid flowed out by the sanding machine 01 that throttles, it can be continuously injected into and manually split in arrow x direction along Fig. 1
Seam, the man-made fracture is because pressure caused by waterpower becomes increasing, so as to realize the hydraulic fracturing of man-made fracture.
In the prior art, as shown in Fig. 2 inflatable packer 10 mainly includes：It is socketed in successively outside central tube 101
Top connection 102, expanding packing element 103 and lower contact 104, set in set junction of the central tube 101 with expanding packing element 103
There is inlet opening (Fig. 2 is not drawn into), power caused by the pressure difference formed up and down of inflatable packer 10 is by inlet opening to expanding
Packing element 103 applies, and expanding packing element 103 is produced deformation, when power caused by pressure difference is more than what expanding packing element 103 can bear
During scope, expanding packing element 103 produces excessive deformation, such as radial direction excessive deformation so that the external diameter of expanding packing element 103 can not be withCasing inner diameterIt is equal, or axial direction generation wriggling of the expanding packing element 103 along central tube 101, it is existing so as to packer mistake envelope occur
As.
The embodiment of the present invention provides a kind of inflatable packer 20, as shown in figure 3, including：
Top connection 201, upper balance fluid cylinder 202, expanding packing element 203, lower balance fluid cylinder 204, central tube 205 and lower contact
206。
Top connection 201, upper balance fluid cylinder 202, expanding packing element 203, lower balance fluid cylinder 204 and lower contact 206, by up to
Under be socketed in successively outside central tube 205, wherein, top connection 201, expanding packing element 203 and lower contact 206 respectively with central tube
205 are fixedly connected, and top connection 201 is fixedly connected with upper balance fluid cylinder 202, and lower contact 206 is fixed with lower balance fluid cylinder 204 to be connected
Connect, upper balance fluid cylinder 202 and lower balance fluid cylinder 204 are flexibly connected with central tube 205 respectively.
In set junction of the central tube 205 with upper balance fluid cylinder 202, expanding packing element 203 and lower balance fluid cylinder 204 respectively
Inlet opening 2051 is provided with, inlet opening 2051 runs through the tube wall of central tube 205.The inlet opening 2051 is used for liquid from central tube
205 inner chamber is directed respectively into what balance fluid cylinder 202, expanding packing element 203 and lower balance fluid cylinder 204 were formed with central tube 205
Cavity, upper balance fluid cylinder 202 and lower balance fluid cylinder 204 are used for power caused by the pressure difference up and down of balanced expansion formula packer 20.
It should be noted that inlet opening 2051 can be provided with three groups, upper balance fluid cylinder 202 and central tube are corresponded to respectively
205 cavitys formed, the cavity that expanding packing element 203 is formed with central tube 205, and lower balance fluid cylinder 204 and central tube 205
The cavity of formation, every group of inlet opening include at least one inlet opening, and common, every group of inlet opening can set 2 with central tube
The 205 symmetrical inlet opening of shaft section.
Further, as shown in figure 4, upper balance fluid cylinder 202 can include upper cylinder sleeve 2021 and upper packing element group 2022, upper cylinder half
Set 2021 is fixedly connected with top connection 201, and upper cylinder sleeve 2021 and upper packing element group 2022 are from top to bottom socketed in central tube 205 successively
Outside, upper packing element group 2022 are flexibly connected with central tube 205, wherein, upper cylinder sleeve 2021 is made of steel material, bearing capacity
Relatively strong, upper packing element group 2022 is made of colloidal materials, can produce deformation.
Lower balance fluid cylinder 204 includes lower rubber cylinder group 2041 and lower cylinder sleeve 2042, and lower cylinder sleeve 2042 is fixed with lower contact 206 to be connected
Connect, lower rubber cylinder group 2041 and lower cylinder sleeve 2042 are from top to bottom socketed in outside central tube 205 successively, lower rubber cylinder group 2041 and center
Pipe 205 is flexibly connected, wherein, lower cylinder sleeve 2042 is made of steel material, and bearing capacity is stronger, and lower rubber cylinder group 2041 uses glue
Material is made, and can produce deformation.
In summary, due to inflatable packer provided in an embodiment of the present invention, there is provided upper balance fluid cylinder and lower balance
Fluid cylinder, for power caused by the pressure difference up and down of balanced expansion formula packer, after the upper and lower packing element group for balancing fluid cylinder is set, have
The annular space and the double action of protection expanding packing element that center seal pipe and sleeve pipe are formed, compared to prior art, are carried
High packer bears the ability of pressure difference, so as to reduce the excessive deformation of expanding packing element and produce the possibility wriggled, therefore,
Simple lost by packer caused by expanding packing element seals phenomenon during hydraulic fracturing can be reduced, and avoids economic loss.
Fig. 5 is illustrated that the part-structure figure of inflatable packer 20, as shown in figure 5, top connection 201 can include outside small
Footpath section 2011 and big outer diameter section 2012, the external diameter of the big outer diameter section 2012 are more than the external diameter of small outer diameter section 2011；Upper cylinder sleeve 2021
Including small internal diameter section 2021a and large diameter section 2021b, large diameter section 2021b internal diameter is interior more than small internal diameter section 2021a
Footpath；Wherein, the large diameter section 2021b of the small outer diameter section 2011 of top connection and upper cylinder sleeve is socketed so that the small outer diameter section of top connection
The lower surface of the 2011 parallel radial directions of central tube 205, the large diameter section 2021b inner surface and the appearance of central tube 205 of upper cylinder sleeve
Face forms cavity P, cavity P can be considered balance fluid cylinder and central, tubular into cavity, inlet opening 2051 connects central tube 205
Inner chamber and cavity P, when liquid is directed respectively into cavity P from central tube 205, as shown in fig. 6, liquid is from inlet opening 2051
Into cavity P, apply upward power b to top connection (Fig. 6 is not indicated), upward cylinder sleeve (Fig. 6 is not indicated) apply downward power c and
The power d of parallel radial direction.The radial direction of central tube 205 be parallel Fig. 5 in axis L direction, the central tube 205 radial direction vertical axis L
Place plane, central tube 205 radially can be with the x directions in parallel Fig. 5.Top connection 201 passes through the first shear pin M with upper cylinder sleeve 2021
It is fixedly connected, the socket of the small outer diameter section 2011 of the first shear pin M vertical top connection of axis and the large diameter section 2021b of upper cylinder sleeve
Face W.
It is common, if top connection is not fixedly connected with upper cylinder sleeve, when upper cylinder half is enclosed on pressure difference and does not reach the second predetermined threshold value,
There may be wriggling, upward packing element group applies pressure so that and upper packing element group is deformed, and causes to balance fluid cylinder premature setting,
In embodiments of the present invention, top connection is fixedly connected by the first shear pin with upper cylinder sleeve, for preventing upper balance fluid cylinder premature setting
Phenomenon occur, above-mentioned second predetermined threshold value is threshold pressure differential when the upper balance fluid cylinder pre-set is set, usually 7-
8MPa。
Fig. 7 is illustrated that the part-structure figure of inflatable packer 20, as shown in fig. 7, lower contact 206 includes small outer diameter section
2061 and big outer diameter section 2062, the external diameter of the big outer diameter section 2062 is more than the external diameter of small outer diameter section 2061；Lower cylinder sleeve 2042 includes
Small internal diameter section 2042a and large diameter section 2042b, the large diameter section 2042b internal diameter are more than small internal diameter section 2042a internal diameter；Its
In, the large diameter section 2042b of lower cylinder sleeve and the small outer diameter section 2061 of lower contact are socketed so that the small outer diameter section 2061 of lower contact is flat
The upper surface of the radial direction of row central tube 205, the large diameter section 2042b inner surface of lower cylinder sleeve and the outer surface of central tube 205 are formed
Cavity Q.Cavity Q can be considered lower balance fluid cylinder and central, tubular into cavity, inlet opening 2051 connects the inner chamber of central tube 205
With cavity Q, when liquid is directed respectively into cavity Q from central tube 205, liquid enters cavity Q from inlet opening with Fig. 6 similarly,
Apply downward power to lower contact, downward cylinder sleeve apply upward power and parallel alley to power.The radial direction of central tube 205 is parallel figure
The direction of axis L in 7, plane where the central tube 205 radial direction vertical axis L, can be the x directions in Fig. 7.Lower cylinder sleeve with
Lower contact is fixedly connected by the second shear pin N, and the second shear pin N axis vertically descends large diameter section 2042b and the lower contact of cylinder sleeve
Small outer diameter section 2061 set junction Z.
It is common, if lower cylinder sleeve is not fixedly connected with lower contact, lower cylinder sleeve when pressure difference does not reach the second predetermined threshold value,
There may be wriggling, upward packing element group applies pressure so that and lower rubber cylinder group is deformed, and causes lower balance fluid cylinder premature setting,
In embodiments of the present invention, lower contact is fixedly connected by the second shear pin with lower cylinder sleeve, for preventing lower balance fluid cylinder premature setting
Phenomenon occur, above-mentioned second predetermined threshold value is threshold pressure differential when the lower balance fluid cylinder pre-set is set, usually 7-
8MPa。
Further, as shown in figure 5, socket on the outer surface of the small outer diameter section 2011 of top connection with upper cylinder sleeve 2021
Place, is provided with the first seal groove 207, the first sealing ring (not indicated in Fig. 5) is provided with the first seal groove 207；Upper cylinder sleeve
Socket place on small internal diameter section 2021a inner surface with central tube 205, it is provided with the second seal groove 208, the second seal groove 208
In be provided with the second sealing ring (not indicated in Fig. 5).As shown in fig. 7, on the outer surface of the small outer diameter section 2061 of lower contact with
The socket place of cylinder sleeve, is provided with the 3rd seal groove 209, and be provided with the 3rd sealing ring in the 3rd seal groove 209 (does not mark in Fig. 7
Show)；Socket place on the small internal diameter section 2042a of lower cylinder sleeve inner surface with central tube, is provided with the 4th seal groove 210, and the 4th
The 4th sealing ring (not indicated in Fig. 7) is provided with seal groove 210.First sealing ring, the second sealing ring, the 3rd sealing ring and
Four sealing rings seal, and prevent liquid from oozing out, wherein, the first sealing ring is used to prevent liquid from connecing from cavity P inflows
First 201 are used to prevent liquid from flowing into central tube 205 and upper cylinder sleeve from cavity P with the gap of upper cylinder sleeve 2021, the second sealing ring
2021 gap, the 3rd sealing ring are used for the gap for preventing liquid from flowing into lower contact 206 and lower cylinder sleeve 2042 from cavity Q, and the 4th
Sealing ring is used for the gap for preventing liquid from flowing into central tube 205 and lower cylinder sleeve 2042 from cavity Q, meanwhile, four sealing rings also may be used
To prevent liquid from entering the gap of inflatable packer 20 so that the inner chamber of inflatable packer 20 and sleeve pipe are completely isolated, this
Sample can effectively prevent scattering and disappearing for the power that pressure difference generated.
Optionally, as shown in figure 4, external screw thread 2052 can be provided with the outer surface of central tube 205；Top connection 201
Lower end is provided with internal thread (Fig. 4 is not drawn into), and top connection 201 is fixedly connected with central tube 205 using thread connecting mode；Under connect
First 206 upper end is provided with internal thread (Fig. 4 is not drawn into), and lower contact 206 is fixed with central tube 205 using thread connecting mode to be connected
Connect.Expanding packing element 203 is provided with internal thread 2031, lower end and the side of being connected through a screw thread of central tube 205 of expanding packing element 203
Formula is fixedly connected, it can be ensured that expanding packing element will not be axially subjected to displacement.Meanwhile in embodiments of the present invention, use
Thread connecting mode is simple to operate, and is connected firmly, and can effectively prevent the compacted of top connection, expanding packing element and lower contact
It is dynamic.
As shown in fig. 7, inflatable packer 20, can also include：Back-up ring 211, back-up ring 211 are located at the platform of central tube 203
Between terrace H and lower rubber cylinder group 2041, it is socketed in outside central tube 205, for stopping connecing for lower rubber cylinder group 2041 and step surface H
Touch, centered on the step surface H external screw thread of pipe 205 and the threaded connection place of expanding packing element 203 formed parallel to central tube
The face H of 205 radial directions, specifically, the platform that the external screw thread 2052 that the back-up ring 211 is fitted on the outer surface of central tube 205 is formed
Terrace, the upper end of back-up ring 211 and step surface H lower end in contact, lower end contacts with lower rubber cylinder group 2041, due to the step of central tube
Face H is steel material, and lower rubber cylinder group 2041 is colloidal materials, and back-up ring 211 can prevent lower rubber cylinder group 2041 from occurring after stress
Deformation, embedded step surface H, influences the use of external screw thread 2052.
It should be noted that, it is necessary to be made by the way that liquid is continuously injected into man-made fracture after inflatable packer is set
Man-made fracture becomes much larger, then the solid particle of high intensity is carried by liquid, and the solid particle is filled to manually splitting
Seam, the inner chamber of top connection, central tube and lower contact is interconnected in embodiments of the present invention, and internal diameter is equal.So, no
It can only ensure that liquid flowing is unimpeded, solid can also be reduced when liquid carries solid particle and passes through inflatable packer
Obstruction suffered by grain, solid particle wears caused by not avoiding the internal diameter of top connection, central tube and lower contact not etc., also corresponding to reduce
The inner chamber damage of top connection, central tube and lower contact.
, first will expansion when carrying out the hydraulic fracturing of oil and gas reservoir using inflatable packer provided in an embodiment of the present invention
The top connection of formula packer is connected with fracturing string, and lower contact is connected with throttling sanding machine, inside pipe casing is placed on, by pressure break pipe
Post extends to the oil and gas reservoir above 10-20m (rice) place that underground distance need to be transformed, and liquid is pumped into fracturing string with pressure break pump truck
Body, liquid are entered by the top connection of inflatable packer, then flow into throttling sanding machine from the lower contact of inflatable packer, but
It is due to that the internal diameter of fracturing string is far longer than the inlet diameter of throttling sanding machine, so as in the formation up and down of inflatable packer
Pressure difference, the flow velocity of the liquid imported from top connection is faster, and the pressure difference formed up and down of inflatable packer is bigger, and workmen can
To control the pressure difference formed up and down of inflatable packer by adjusting the flow velocity for the liquid for importing inflatable packer, with reality
Existing inflatable packer is effectively set.
Specifically, because three groups of inlet openings correspond to upper balance fluid cylinder 202 and the cavity of the formation of central tube 205, expansion respectively
The cavity that formula packing element 203 and central tube 205 are formed, and the cavity that lower balance fluid cylinder 204 is formed with central tube 205, then liquid
By three groups of inlet openings upper balance fluid cylinder, expanding packing element and lower balance fluid cylinder and central tube are directed respectively into from the inner chamber of central tube
The cavity of formation, balance fluid cylinder, expanding packing element and lower balance fluid cylinder is set to produce deformation under differential pressure action.Need what is illustrated
It is that the deformation of upper balance fluid cylinder, expanding packing element and lower balance fluid cylinder is radial deformation, and typically diameter becomes big, and length becomes
It is small, constancy of volume.After pressure difference is more than the first predetermined threshold value, expanding packing element is in deformation external diameter extremely and the casing inner diameter phase
Deng when, realization is set, and realizes the effect of the annular space of sealing sleeve pipe and central tube；It is more than the second predetermined threshold value in pressure difference
Afterwards, as shown in fig. 6, because top connection is by upward power b, upper cylinder sleeve c forced downwards, then upper cylinder sleeve and top connection are connected
The first shear pin continue stress, when reaching the tenability limit of the first shear pin, the first shear pin is cut in the presence of pulling force, upper cylinder half
The disconnection that is fixedly connected with top connection is covered, upper cylinder sleeve c forced downwards, is moved down, packing element group in compression, upper packing element group exists
Interference fit effect is produced when the external diameter of deformation extremely is equal with the casing inner diameter, packing element group is set in realization, now, upper equilibrium liquid
Cylinder is set, and upper packing element group realizes the effect for strengthening sealing and protection expanding packing element；Because lower contact is by upward power, under
Cylinder sleeve is forced downwards, and the second shear pin is cut in the presence of pulling force, lower cylinder sleeve and the disconnection that is fixedly connected of lower contact, lower cylinder
Set is moved up by upward power, lower rubber cylinder group is compressed, when external diameter of the lower rubber cylinder group in deformation extremely is equal with the casing inner diameter
And interference fit effect is produced, realize that lower rubber cylinder group is set, now, lower balance fluid cylinder is set, and it is close that lower rubber cylinder group realizes reinforcement
The effect of envelope and protection expanding packing element, it is thereby achieved that upper balance fluid cylinder is set and lower balance fluid cylinder is set.Sealed in expanding
After device is set, upper balance fluid cylinder, the outer wall of expanding packing element and lower balance fluid cylinder and casing inner diameter completely attach to.Need to illustrate
, the second predetermined threshold value is more than the first predetermined threshold value, and first predetermined threshold value can be 1.2 1 1.5MPa, and this is second default
Threshold can be 7-8MPa.
In summary, due to inflatable packer provided in an embodiment of the present invention, there is provided upper balance fluid cylinder and lower balance
Fluid cylinder, for power caused by the pressure difference up and down of balanced expansion formula packer, after the upper and lower packing element group for balancing fluid cylinder is set, have
The annular space and the double action of protection expanding packing element that center seal pipe and sleeve pipe are formed, compared to prior art, are carried
High packer bears the ability of pressure difference, so as to reduce the excessive deformation of expanding packing element and produce the possibility wriggled, therefore,
Simple lost by packer caused by expanding packing element seals phenomenon during hydraulic fracturing can be reduced, and avoids economic loss.
A kind of inflatable packer of offer of the embodiment of the present invention sets method, for expansion provided in an embodiment of the present invention
Formula packer, the inflatable packer include：Top connection, upper balance fluid cylinder, expanding packing element, lower balance fluid cylinder, central tube
And lower contact, the upper balance fluid cylinder include upper cylinder sleeve and upper packing element group, the upper cylinder sleeve is cut with the top connection by first
Nail is fixedly connected, and the upper cylinder sleeve and the upper packing element group are from top to bottom socketed in outside the central tube successively；It is described lower flat
Weighing apparatus fluid cylinder includes lower rubber cylinder group and lower cylinder sleeve, and the lower cylinder sleeve is fixedly connected with the lower contact by the second shear pin, under described
Packing element group and the lower cylinder sleeve are from top to bottom socketed in outside the central tube successively.As shown in figure 8, the inflatable packer
The method of setting includes：
In step 801, liquid is imported from top connection, is exported from lower contact to throttling sanding machine, insulate expanding
The formation pressure difference up and down of device.
In step 802, liquid is directed respectively into upper balance fluid cylinder, expanding packing element and lower balance from the inner chamber of central tube
Fluid cylinder and central, tubular into cavity, make to balance fluid cylinder, expanding packing element and lower balance fluid cylinder and produce shape under differential pressure action
Become.
More than after the first predetermined threshold value in step 803, in pressure difference, expanding packing element is set.
It should be noted that when liquid from the inner chamber of central tube import expanding packing element and central, tubular into cavity after,
Expanding packing element is produced deformation under differential pressure action to being bonded completely with casing inner diameter, realize sealing sleeve pipe and central tube
The effect of annular space.
In step 804, after pressure difference is more than the second predetermined threshold value, the first shear pin is cut, and makes cylinder sleeve and top connection
Disconnection is fixedly connected with, upper cylinder sleeve moves down, and packing element group in compression, sets packing element group.
It should be noted that upper cylinder sleeve and top connection be fixedly connected with disconnection after, upper cylinder sleeve moves down the upper packing element group of compression
With expanding packing element, packing element group and expanding packing element is set to be badly deformed to reach casing inner diameter to external diameter and produce interference fit and make
With.Now, upper packing element group realizes the effect for strengthening sealing and protection expanding packing element.
In step 805, after pressure difference is more than the second predetermined threshold value, the second shear pin is cut, and makes lower cylinder sleeve and lower contact
Disconnection is fixedly connected with, lower cylinder sleeve moves up, and compresses lower rubber cylinder group, sets lower rubber cylinder group.
It should be noted that the second shear pin cut, lower cylinder sleeve move up compression lower rubber cylinder group, make lower rubber cylinder group be badly deformed to
External diameter reaches casing inner diameter and produces interference fit effect.Now, lower rubber cylinder group realizes reinforcement sealing and protection expanding glue
The effect of cylinder.
Wherein, the second predetermined threshold value is more than the first predetermined threshold value.
In summary, method is set due to inflatable packer provided in an embodiment of the present invention, due to being more than in pressure difference
After second predetermined threshold value, upper balance fluid cylinder and lower balance fluid cylinder are set, and have the annular space that center seal pipe and sleeve pipe are formed
And the double action of protection expanding packing element, power caused by the pressure difference up and down of inflatable packer is balanced, compared to existing
Technology, the ability that packer bears pressure difference is improved, so as to reduce the excessive deformation of expanding packing element and produce the possibility wriggled
Property, therefore, it is possible to reduce hydraulic fracturing during it is simple rely on packer caused by expanding packing element to lose envelope phenomenon, avoid through
Ji loss.
It should be noted that the sequencing for setting method and step of inflatable packer provided in an embodiment of the present invention can
Suitably to be adjusted, step according to circumstances can also accordingly be increased and decreased, for example, step 804 and 805 position can be mutual
Change, any one skilled in the art the invention discloses technical scope in, method that change can be readily occurred in,
It should all be included within the scope of the present invention, therefore repeat no more.
In summary, method is set due to inflatable packer provided in an embodiment of the present invention, due to being more than in pressure difference
After second predetermined threshold value, upper balance fluid cylinder and lower balance fluid cylinder are set, and have the annular space that center seal pipe and sleeve pipe are formed
And the double action of protection expanding packing element, power caused by the pressure difference up and down of inflatable packer is balanced, compared to existing
Technology, the ability that packer bears pressure difference is improved, so as to reduce the excessive deformation of expanding packing element and produce the possibility wriggled
Property, therefore, it is possible to reduce hydraulic fracturing during it is simple rely on packer caused by expanding packing element to lose envelope phenomenon, avoid through
Ji loss.
It is apparent to those skilled in the art that for convenience of description and succinctly, the side of foregoing description
The specific work process of method, the corresponding process in aforementioned means embodiment is may be referred to, will not be repeated here.
Presently preferred embodiments of the present invention is these are only, is not intended to limit the invention, it is all in the spirit and principles in the present invention
Within, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (6)
- A kind of 1. inflatable packer, it is characterised in that including：Top connection, upper balance fluid cylinder, expanding packing element, lower balance fluid cylinder, central tube and lower contact；The top connection, upper balance fluid cylinder, the expanding packing element, the lower balance fluid cylinder and the lower contact, by upper Be socketed in successively outside the central tube under, wherein, the top connection, the expanding packing element and the lower contact respectively with The central tube is fixedly connected, and the top connection is fixedly connected with the upper balance fluid cylinder, the lower contact and the lower balance Fluid cylinder is fixedly connected, and the upper balance fluid cylinder and the lower balance fluid cylinder are flexibly connected with the central tube respectively；It is described it is upper balance fluid cylinder include upper cylinder sleeve and upper packing element group, the upper cylinder sleeve is fixedly connected with the top connection, it is described on Cylinder sleeve and the upper packing element group are from top to bottom socketed in outside the central tube successively；The lower balance fluid cylinder includes lower rubber cylinder group and lower cylinder sleeve, and the lower cylinder sleeve is fixedly connected with the lower contact, under described Packing element group and the lower cylinder sleeve are from top to bottom socketed in outside the central tube successively；The central tube with it is described on balance fluid cylinder, the expanding packing element and it is described it is lower balance fluid cylinder set junction on respectively Inlet opening is provided with, the inlet opening runs through the tube wall of the central tube；The top connection includes small outer diameter section and big outer diameter section, and the external diameter of the big outer diameter section is more than the outer of the small outer diameter section Footpath；The lower contact includes small outer diameter section and big outer diameter section, and the external diameter of the big outer diameter section is more than the outer of the small outer diameter section Footpath；The upper cylinder sleeve includes small internal diameter section and large diameter section, and the internal diameter of the large diameter section is more than the interior of the small internal diameter section Footpath；The lower cylinder sleeve includes small internal diameter section and large diameter section, and the internal diameter of the large diameter section is more than the interior of the small internal diameter section Footpath；Wherein, the large diameter section of the small outer diameter section of the top connection and the upper cylinder sleeve is socketed, the large diameter section of the lower cylinder sleeve It is socketed with the small outer diameter section of the lower contact；The top connection is fixedly connected with the upper cylinder sleeve by the first shear pin, the axis of first shear pin it is vertical it is described on connect The small outer diameter section of head and the set junction of the large diameter section of the upper cylinder sleeve；The lower cylinder sleeve is fixedly connected with the lower contact by the second shear pin, the vertical lower cylinder of axis of second shear pin The large diameter section of set and the set junction of the small outer diameter section of the lower contact.
- 2. inflatable packer according to claim 1, it is characterised in thatWith the socket place of the upper cylinder sleeve on the outer surface of the small outer diameter section of the top connection, the first seal groove is provided with, it is described The first sealing ring is provided with first seal groove；Socket place on the inner surface of the small internal diameter section of the upper cylinder sleeve with the central tube, is provided with the second seal groove, described The second sealing ring is provided with second seal groove；With the socket place of the lower cylinder sleeve on the outer surface of the small outer diameter section of the lower contact, the 3rd seal groove is provided with, it is described The 3rd sealing ring is provided with 3rd seal groove；Socket place on the inner surface of the small internal diameter section of the lower cylinder sleeve with the central tube, is provided with the 4th seal groove, described The 4th sealing ring is provided with 4th seal groove.
- 3. inflatable packer according to claim 1, it is characterised in thatExternal screw thread is provided with the outer surface of the central tube；The lower end of the top connection is provided with internal thread, and the top connection is fixed with the central tube using thread connecting mode to be connected Connect；The expanding packing element is provided with internal thread, the lower end of the expanding packing element and the central tube side of being connected through a screw thread Formula is fixedly connected；The upper end of the lower contact is provided with internal thread, and the lower contact is fixed with the central tube using thread connecting mode to be connected Connect.
- 4. inflatable packer according to claim 3, it is characterised in thatThe inflatable packer, in addition to：Back-up ring, the back-up ring are located between step surface and the lower rubber cylinder group of the central tube, are socketed in outside the central tube Portion, for stopping lower rubber cylinder group contact with the step surface, the step surface is the central tube and the expanding The face parallel to the central tube radial direction that the external screw thread of packing element threaded connection place is formed.
- 5. according to the inflatable packer described in Claims 1-4 any one claim, it is characterised in thatThe inner chamber of the top connection, the central tube and the lower contact is interconnected, and internal diameter is equal.
- 6. a kind of inflatable packer sets method, it is characterised in that for inflatable packer, the inflatable packer Including：Top connection, upper balance fluid cylinder, expanding packing element, lower balance fluid cylinder, central tube and lower contact, the upper balance fluid cylinder bag Cylinder sleeve and upper packing element group are included, the upper cylinder sleeve is fixedly connected with the top connection by the first shear pin, the upper cylinder sleeve and institute Packing element group is stated from top to bottom to be socketed in successively outside the central tube；The lower balance fluid cylinder includes lower rubber cylinder group and lower cylinder Set, the lower cylinder sleeve are fixedly connected with the lower contact by the second shear pin, and the lower rubber cylinder group and the lower cylinder sleeve are by up to Under be socketed in successively outside the central tube；Methods described includes：Liquid is imported from top connection, is exported from lower contact to throttling sanding machine, makes the formation up and down of the inflatable packer Pressure difference；Liquid is directed respectively into upper balance fluid cylinder, expanding packing element and lower balance fluid cylinder and the central tube from the inner chamber of central tube The cavity of formation, the upper balance fluid cylinder, the expanding packing element and the lower balance fluid cylinder is set to be produced under the differential pressure action Raw deformation；After pressure difference is more than the first predetermined threshold value, the expanding packing element is set；After pressure difference is more than the second predetermined threshold value, first shear pin is cut, and makes the fixation of the upper cylinder sleeve and the top connection Connection disconnects, and the upper cylinder sleeve moves down, and compresses the upper packing element group, sets the upper packing element group；After pressure difference is more than second predetermined threshold value, second shear pin is cut, and makes the lower cylinder sleeve and the lower contact Disconnection is fixedly connected with, the lower cylinder sleeve moves up, and compresses the lower rubber cylinder group, sets the lower rubber cylinder group；Wherein, second predetermined threshold value is more than first predetermined threshold value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410415431.4A CN105401909B (en) | 2014-08-21 | 2014-08-21 | Expanding packer and setting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415431.4A CN105401909B (en) | 2014-08-21 | 2014-08-21 | Expanding packer and setting method thereof |
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| CN105401909A CN105401909A (en) | 2016-03-16 |
| CN105401909B true CN105401909B (en) | 2018-04-03 |
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| CN201410415431.4A Active CN105401909B (en) | 2014-08-21 | 2014-08-21 | Expanding packer and setting method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106761537A (en) * | 2016-12-13 | 2017-05-31 | 中国石油化工股份有限公司 | Multichannel end is all-round to resilient support isolating seal device |
| CN112012688B (en) * | 2020-10-16 | 2022-07-15 | 山东大东联石油设备有限公司 | Relay seat-sealing type packer and method |
| CN112482986B (en) * | 2020-12-28 | 2022-06-10 | 西南石油大学 | Hydraulic lifting tool in pit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2856398Y (en) * | 2005-12-28 | 2007-01-10 | 长春市恒大石油机械厂 | High pressure durable expanding packer |
| CN2900771Y (en) * | 2006-05-11 | 2007-05-16 | 铁岭中油机械设备制造有限公司 | Expansion type oil well packer |
| CN201883994U (en) * | 2010-11-23 | 2011-06-29 | 中国石油天然气股份有限公司 | Self-constant pressure expanding open hole packer |
| CN202152662U (en) * | 2011-07-15 | 2012-02-29 | 中国石油天然气股份有限公司 | Water hammer resistant liquid inlet device of expansion packer |
| CN202402005U (en) * | 2012-01-06 | 2012-08-29 | 中国石油天然气股份有限公司 | Long rubber sleeve high-pressure water injection packer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7284619B2 (en) * | 2005-02-02 | 2007-10-23 | Tam International, Inc. | Packer with positionable collar |
-
2014
- 2014-08-21 CN CN201410415431.4A patent/CN105401909B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2856398Y (en) * | 2005-12-28 | 2007-01-10 | 长春市恒大石油机械厂 | High pressure durable expanding packer |
| CN2900771Y (en) * | 2006-05-11 | 2007-05-16 | 铁岭中油机械设备制造有限公司 | Expansion type oil well packer |
| CN201883994U (en) * | 2010-11-23 | 2011-06-29 | 中国石油天然气股份有限公司 | Self-constant pressure expanding open hole packer |
| CN202152662U (en) * | 2011-07-15 | 2012-02-29 | 中国石油天然气股份有限公司 | Water hammer resistant liquid inlet device of expansion packer |
| CN202402005U (en) * | 2012-01-06 | 2012-08-29 | 中国石油天然气股份有限公司 | Long rubber sleeve high-pressure water injection packer |
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