CN105089601B - Infinite-stage sliding sleeve and process method - Google Patents
Infinite-stage sliding sleeve and process method Download PDFInfo
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- CN105089601B CN105089601B CN201510219564.9A CN201510219564A CN105089601B CN 105089601 B CN105089601 B CN 105089601B CN 201510219564 A CN201510219564 A CN 201510219564A CN 105089601 B CN105089601 B CN 105089601B
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Abstract
An infinite sliding sleeve and a process method thereof belong to the technical field of grading devices for fracturing and acidizing of oil field production wells. When the coupling is in a well, the coupling is connected with the body, a displacement sliding sleeve is arranged in the body, and the lower end of the body is connected with a lower joint; three long round holes are formed on the body, and a plurality of discontinuous annular grooves are formed in the lower portion of the interior of the body; a displacement sliding sleeve is arranged in the body when a well is drilled, a first O-shaped sealing ring and a second O-shaped sealing ring are respectively arranged at the upper end and the lower end of the outer part of the displacement sliding sleeve, a discontinuous annular groove is arranged below the second O-shaped sealing ring at the lower part of the displacement sliding sleeve, the displacement sliding sleeve and the body are fixed by a sliding sleeve shear pin, and a cutting groove is formed at the lower end part of the inner diameter of the displacement sliding sleeve so as to facilitate the rotation of the displacement sliding sleeve; a lock ring is arranged outside the lower end of the displacement sliding sleeve; the inner diameter of the displacement sliding sleeve is provided with an annular groove for grading, and the axial length of the annular groove is only changed during grading without changing other sizes.
Description
Technical field
The present invention relates to a kind of infinite stages sliding sleeve and process, belongs to oilfield producing well pressure break, Acidizing Technology field.
Background technology
In order to play the production capacity of oilfield producing well to greatest extent, production well yield is kept, in the life of Oil/gas Well
The technical measures such as pressure break, acidifying will be carried out to some wells by producing in the cycle, because payzone is embedded in hundreds of stratum for arriving several kms
Depths, it is divided into many series of strata, affected by various factors, each interlayer is inevitably there is difference, i.e., we are usually said
Interlayer contradiction.Want to play the potentiality of each layer to greatest extent, it is necessary to as much as possible handle each individual layer, conventional classification
Method mainly uses spherically seated, i.e., the internal diameter of ball seat is less and less from top to bottom.The serious increasing for constraining acid fracturing series
Add the lifting with scale.
Prior art one related to the present invention：Stage acidizing pressure break has been that the oilfield stimulation technology of current comparative maturity is arranged
Apply, conventional method is by the way of ball seat and ball progressively diminish from top to bottom.
The technical scheme of prior art one：Seen with external staged fracturing segmentation series, general 0.125in（3.175mm）For
One-level, minimum diameter 1.25in（31.75mm）, according to be 2 7/8in × 5.5mm specification oil pipes, maximum can only be discharged to 52.
5mm（Ball bigger 0.25in than ball seat is 6.35mm）That is, by so arrangement, it is interior only in 2 7/8in × 5.5mm specifications oil pipe
It can discharge 6.5 grades, most 7 grades, and the present invention is not influenceed then by pipe aperture.
The shortcomings that prior art one：Due to being classified using the method for ball seat classification, institute's energy in certain internal diameter oil pipe
The rank separated is restricted, and due in ball seat through less and less from top to bottom, huge discharge carry out acid fracturing during
Very big chock pressure difference will be produced, certainly will thus improve the operating pressure of Operation Van's group plunger pump, increase the erosion to instrument,
The raising of cultivation scale is also limit simultaneously, it is difficult to gives full play to the potential of payzone.
The content of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of infinite stages sliding sleeve and process, is Oil/gas Well acid
Change the aid that pressure break offer is a kind of effectively, can be infinitely classified, it is of the invention complete with traditional existing stage division
It is complete different, it not only can infinitely be classified, the consistent of tool bores at different levels can also be kept, why can accomplish infinitely to be classified and each
Level internal diameter is consistent, be because be not use the existing method from radial grading, but use completely newly to the think of axially started with
Dimension, to greatest extent uses limited internal diameter, so as to reduce liquid stream frictional resistance and erosion to instrument, plays acid fracturing and sets
Standby ability, lift the scale of acid fracturing.
A kind of process of infinite stages sliding sleeve, contains following steps；
Should clearly construct the processing number of plies of well first, then subtract 1 on the basis of the number of plies and exactly need the process layer prepared
Number, confirms H, L correspondingly-sizeds and order at different levels, pipe aperture is more than displacement sliding sleeve internal diameter, and should not have straight step；
Successively close to the position of the lower packet access present invention and anchoring device between two packers, with oil pipe by under pipe string
Enter in well, install set packer after production tree, subsequently into acid fracturing program；
When needing to open one layer of oil pipe passage, from sealing displacement mechanism of the oil pipe input including ball sealer, low row
Amount pumping on claw type displacement ball seat after sliding sleeves at different levels above by place, dividing valve boss to be embedded into displacement sliding sleeve annular groove, V
Shape sealing ring seals up displacement sliding sleeve, does not have fluid course on oil pipe now, and the result that pump works on is exactly hydraulic pressure rise,
And it is changed into downward Axial Loads herein on sliding sleeve shear pin, when axial load caused by hydraulic pressure reaches sliding sleeve shear pin
Shear force shear pin cut, sealing displacement mechanism drives displacement sliding sleeve simultaneously descending, acidifying pressure channel is opened, when being bound
Lock ring boss reach intrinsic groove when elastic force effect under along radial development be embedded in groove, by the sealing in addition to ball sealer
Displacement mechanism is locked in current location, and because every mouthful of well has several intervals, acid fracturing, which finishes, is carrying out the row of returning or production
When, every layer of ball sealer is likely to by liquid stream with up, and the outside dimension of conventional seals ball is more than in claw type displacement ball seat
Footpath, there is locking mechanism to be just unlikely to make ball sealer to head on sealing displacement mechanism up and close production liquid passage, and seal displacement
Mechanism lower end is designed with extension claw-like structures, and moving to this even if ball sealer also has enough equivalent aeras to pass through liquid stream.
During fracture acidizing processing, low discharge capacity pumping, when the boss of L length reaches the H size grooves of corresponding level, due to this
When L ＜ H, in the case where dividing claw elastic force to act on, L is embedded into H, and the whole displacement mechanism that seals just has been hung on displacement sliding sleeve, v-seal
Circle seals displacement sliding sleeve endoporus, continues pumps hydraulic and is changed into downward Axial Loads herein on sliding sleeve shear pin, when
The shear force shear pin that axial load caused by hydraulic pressure reaches sliding sleeve shear pin is cut, and sealing displacement mechanism drives displacement sliding sleeve same
When it is descending, acidifying pressure channel is opened, when bound lock ring boss reaches intrinsic groove along footpath under elastic force effect
To the embedded groove of expansion, the sealing displacement mechanism in addition to ball sealer is locked in current location.
A kind of infinite stages sliding sleeve, by box cupling 1, body 2, displacement sliding sleeve 3, the first O-ring seals 4, sliding sleeve shear pin 5, lock ring
6, the second O-ring seals 7, fixing screws 8, lower contact 9, claw type displacement ball seat 10, ball sealer 11, v-ring 12, every
Ring 13, it is oriented to the grade of retainer ring 14 composition；
State when entering well is 1 time connection body 2 of box cupling, has displacement sliding sleeve 3, the connection lower contact of the lower end of body 2 in body 2
9；
It is provided with three slotted holes on body 2, portion there are some discontinuous annular grooves on the lower in body 2；
Displacement sliding sleeve 3 is housed when entering well in body 2, the outside upper and lower ends of displacement sliding sleeve 3 have respectively the first O-ring seals 4,
Second O-ring seals 7, there is discontinuous annular groove under the second O-ring seals of bottom 7 of displacement sliding sleeve 3, displacement sliding sleeve 3 and this
Body 2 is fixed by sliding sleeve shear pin 5, and the internal diameter bottom of displacement sliding sleeve 3 has grooving to be easy to use instrument along the circumferential direction to revolve it
Turn；
There is an annular groove for classification in the top portion of the internal diameter of displacement sliding sleeve 3, only change during classification annular groove axial length and
Other sizes are not changed；
With lower contact 9 by being threadedly coupled, the second O-ring seals 7 seal body 2, by fixing screws 8 connect body 2 with
The anti-rotation of lower contact 9, lock ring 6 are arranged between body 2 and displacement sliding sleeve 3.；
Ball sealer 11, claw type displacement ball seat 10, v-ring 12, spacer ring 13 and the sealing position for being oriented to the composition of retainer ring 14
Moving device.
Length from the sealing gearshift upper shed claw type outer lug boss of oil pipe input and the annular groove in displacement sliding sleeve 3
Length corresponds, and only when land length is less than groove length, boss can just be embedded into groove；
The equivalent aera passed through in oil pipe in the sealing gearshift above liquid stream of input is identical.
Elastic lock ring that opening is provided with the discontinuous annular groove in the bottom of displacement sliding sleeve 3, that external diameter locally protrudes, installation
When the lock ring 6 extruded by the internal diameter of body 2, the discontinuous groove that local projection is avoided on body 2 can load, and cross discontinuous
Shear pin is fixed after projection is gone into same axis with discontinuous groove after groove, and sliding sleeve shear pin 5 is by cutting displacement sliding sleeve during work
When coming downwards to discontinuous groove with lock ring, lock ring opens by elastic force, and boss is embedded into discontinuous groove, and ball sealer is removed in input part
It is lockable outside, avoids closing liquid outlet channel because output liquid flow impact will be put into part above pushes away.
It is an advantage of the invention that the limited internal diameter of oil pipe is make use of to large extent；Sliding sleeve internal diameters at different levels are consistent；Reduce liquid
Flow frictional resistance;Be advantageous to improve acid fracturing scale；Reduce erosion to instrument oil well pipe, be advantageous to raising instrument reliability and
Construction safety.
Present invention also offers a kind of infinite stages sliding sleeve, including body, infinite stages sliding sleeve also includes：Displacement sliding sleeve, displacement
Sliding sleeve is arranged in body, and is provided with annular groove on the inwall of displacement sliding sleeve；Seal gearshift, sealing gearshift input
In displacement sliding sleeve, and seal and be provided with boss on the outside of gearshift；Wherein, it is descending out of displacement sliding sleeve to seal gearshift,
And when sealing gearshift moves to its boss position relative with annular groove, if the height of boss is more than on displacement sliding sleeve
The height of annular groove, sealing gearshift is moved in sliding sleeve in place to be continued traveling downwardly；If the height for sealing the boss of gearshift is less than
The height of the annular groove of displacement sliding sleeve, boss insertion annular groove is interior so that sealing gearshift is hung on displacement sliding sleeve.
Further, multiple annular grooves are provided with displacement sliding sleeve, multiple annular grooves are axial arranged along displacement sliding sleeve；When
Sealing gearshift moves down into its boss position relative with an annular groove of displacement sliding sleeve, and the height of boss is less than therewith
During the height of relative annular groove, in boss insertion annular groove.
Further, seal and multiple boss are provided with gearshift, and multiple boss correspond with multiple annular grooves
Ground is set.
Further, infinite stages sliding sleeve also includes sliding sleeve shear pin, and displacement sliding sleeve is fixed on body by sliding sleeve shear pin.
Further, mounting groove is provided with the outer wall of displacement sliding sleeve, lock ring, and the inwall of body are installed in mounting groove
On be provided with lock slots；When displacement sliding sleeve is fixed on body by sliding sleeve shear pin, lock ring is connected on the inwall of body；When
After sliding sleeve shear pin is cut, displacement sliding sleeve is moved down until in one end insertion lock slots of the remote displacement sliding sleeve of lock ring with lock ring
So that displacement sliding sleeve is fixed on body.
Brief description of the drawings
When considered in conjunction with the accompanying drawings, by referring to following detailed description, can more completely more fully understand the present invention with
And easily learn many of which with the advantages of, but accompanying drawing described herein be used for a further understanding of the present invention is provided,
The part of the present invention is formed, schematic description and description of the invention is used to explain the present invention, do not formed to this hair
Bright improper restriction, wherein：
Fig. 1 is the half section structure diagram when present invention enters well；
Fig. 2 is the half section structure diagram when present invention puts into displacement sealing mechanism and opens sliding sleeve；
Fig. 3 is Fig. 1 A-A cross-section cutaway views；
Fig. 4 is Fig. 2 B-B cross-section cutaway views；
Fig. 5 is that claw type displacement ball seat divides claw land length to be less than displacement sliding sleeve annular slot length and state when being tangled
（Operating position）；
Fig. 6 be claw type displacement ball seat divide claw land length be more than displacement sliding sleeve annular slot length and by when state
（Off-position）；
The present invention is further described with reference to the accompanying drawings and examples.
Embodiment
Obviously, those skilled in the art belong to the guarantor of the present invention based on many modifications and variations that spirit of the invention is done
Protect scope.
Embodiment 1：As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, by box cupling 1, body 2, displacement sliding sleeve 3, the first O
Shape sealing ring 4, sliding sleeve shear pin 5, lock ring 6, the second O-ring seals 7, fixing screws 8, lower contact 9, claw type displacement ball seat 10,
Ball sealer 11, v-ring 12, spacer ring 13, it is oriented to the grade of retainer ring 14 composition.
Fig. 1 is the state when present invention enters well, and input is by 10~14 sealing displacement machines formed when Fig. 2 works for the present invention
Structure and state when opening sliding sleeve.
What unlimited classification was realized in：As shown in figure 1, the state when present invention enters well is 1 time connection body 2 of box cupling,
Symmetrical three slotted holes are provided with body 2, the internal diameter bottom of body 2 is machined with symmetrical grooves, and body 2 is built with sealing ring
Displacement sliding sleeve 3 seals slotted hole, and upper end is machined with the annular groove that length is H in displacement sliding sleeve 3, is machined with not on the external diameter of lower end
Continuous annular groove, groove are fixed built with opening boss lock ring, displacement sliding sleeve 3 with body 2 by sliding sleeve shear pin 5.The lower end of body 2 connects
Tipping has the lower contact 9 of the second O-ring seals 7, and box cupling 1 and lower contact 9 are tubing round thread.
Lock ring 6 has a bidirectional locking function, should rotate an angle in position shown in Fig. 1 displacements sliding sleeve 3 during installation, make lock
The boss of ring 6 avoids the groove on body 2, again rotates displacement sliding sleeve 3 to position shown in Fig. 1 after boss crosses groove.
As shown in Fig. 2 when fracture acidizing is handled, put into from bottom to top by 10~14 sealing displacement mechanisms formed, and it is low
Discharge capacity pumps, when the boss of L length reaches the H size grooves of corresponding level, due to now L ＜ H（See Fig. 5）, dividing claw bullet
The lower L of power effect is embedded into H, and the whole displacement mechanism that seals just has been hung on displacement sliding sleeve 3, and v-ring is by the endoporus of displacement sliding sleeve 3
Sealing, continue pumps hydraulic and be changed into downward Axial Loads herein on sliding sleeve shear pin, when axial direction caused by hydraulic pressure
The shear force shear pin that load reaches sliding sleeve shear pin 5 is cut, and sealing displacement mechanism drives displacement sliding sleeve 3 simultaneously descending, opens acid
Change pressure break passage, it is recessed along radial development insertion under elastic force effect when bound lock ring boss reaches intrinsic groove
Groove, the sealing displacement mechanism in addition to ball sealer is locked in current location.
The present invention is in the case where realizing unlimited classification, and the internal diameter of fluid course is consistent, not to sacrifice internal diameter as generation
Valency.It is realized in infinite stages：As L ＞ H（See Fig. 6）When sealing displacement mechanism would not be tangled and be continued traveling downwardly, until L
＜ H claw type displacements ball seats can just act to displacement sliding sleeve, and principle, is designed as if this grade of H is designed as 15, L by us according to this
10, and, be 110, L 105 to 20 grades of H with 5 mm incrementally.Seen with external staged fracturing segmentation series, general 0.125in
（3.175mm）For one-level, minimum diameter 1.25in（31.75mm）, according to be 2 7/8in × 5.5mm specification oil pipes, it is maximum
52. 5mm can only be discharged to（Ball bigger 0.25in than ball seat is 6.35mm）That is, by so arrangement, in 2 7/8in × 5.5mm
It can only discharge 6.5 grades in specification oil pipe, most 7 grades, and the present invention is not influenceed then by pipe aperture.
Embodiment 2：As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, a kind of infinite stages sliding sleeve, by box cupling 1, body 2,
Displacement sliding sleeve 3, the first O-ring seals 4, sliding sleeve shear pin 5, lock ring 6, the second O-ring seals 7, fixing screws 8, lower contact 9,
Claw type displacement ball seat 10, ball sealer 11, v-ring 12, spacer ring 13, it is oriented to the grade of retainer ring 14 composition.
State when entering well is 1 time connection body 2 of box cupling, has displacement sliding sleeve 3, the connection lower contact of the lower end of body 2 in body 2
9。
It is provided with three slotted holes on body 2, portion there are some discontinuous annular grooves on the lower in body 2.
Displacement sliding sleeve 3 is housed when entering well in body 2, the outside upper and lower ends of displacement sliding sleeve 3 have respectively the first O-ring seals 4,
Second O-ring seals 7, there is discontinuous annular groove under the second O-ring seals of bottom 7 of displacement sliding sleeve 3, displacement sliding sleeve 3 and this
Body 2 is fixed by sliding sleeve shear pin 5, and the internal diameter lower end of displacement sliding sleeve 3 has grooving to be easy to use instrument along the circumferential direction to rotate it.
There is an annular groove for classification in the top portion of the internal diameter of displacement sliding sleeve 3, only change during classification annular groove axial length and
Other sizes are not changed.
Body 2, by being threadedly coupled, is sealed with lower contact 9 by the second O-ring seals 7, and body 2 is connected by fixing screws 8
With the anti-rotation of lower contact 9.
Need to put into by ball sealer 11, claw type displacement ball seat 10, v-ring 12, spacer ring 13 and lead from oil pipe during work
To the sealing gearshift of the grade composition of retainer ring 14.
Length from the sealing gearshift upper shed claw type displacement outer lug boss of oil pipe input and the annular in displacement sliding sleeve 3
Groove length corresponds, and only when land length is less than groove length, boss can just be embedded into groove.
Oil pipe is identical in the equivalent aera that input sealing gearshift above liquid stream is passed through.
Elastic lock ring that opening is provided with the discontinuous annular groove in the bottom of displacement sliding sleeve 3, that external diameter locally protrudes, installation
When the lock ring 6 extruded by the internal diameter of body 2, the discontinuous groove that local projection is avoided on body 2 can load, and cross discontinuous
Shear pin is fixed after projection is gone into same axis with discontinuous groove after groove, after sliding sleeve shear pin 5 is cut during work displacement slide
When coming downwards to discontinuous groove with lock ring, lock ring opens by elastic force, and boss is embedded into discontinuous groove, and ball sealer is removed in input part
It is lockable outside, avoids partly above pushing away closing liquid outlet channel because output liquid flow impact will be put into.
It is enough from the claw type displacement land length on the sealing gearshift of oil pipe input during work, by not being therewith
During supporting displacement sliding sleeve annular groove, bottom guiding mechanism have been introduced into lower contact internal diameter and upper jaw morpheme moving device it is convex
Platform is also located in displacement sliding sleeve, so that ensure can also normal use in horizontal well.
Sealing displacement mechanism lower end is designed with extension claw-like structures, and moving to this even if ball sealer also has enough equivalent aeras
Liquid outlet channel will not can herein be blocked by liquid stream.
Embodiment 3：As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6,
A kind of infinite stages sliding sleeve, itself can realize and be divided into infinite stages in same well, every grade of sliding sleeve it is interior through keeping
Unanimously, it can largely reduce the frictional resistance of liquid stream, be advantageous to increase treatment scale.
It is the further optimization/and improvement to technical solution of the present invention below：
Three elongated slots are symmetrically provided with above-mentioned body 2, its equivalent aera is much larger than pipe aperture area, during reducing pressure break
Erosion degree of the load fluid to sleeve pipe and body；
Above-mentioned displacement sliding sleeve is installed in body, and is fixed by shear pin；Lock ring is installed therebetween；
Above-mentioned claw type displacement ball seat reaches corresponding displacement sliding sleeve time-division claw boss and is embedded into displacement sliding sleeve annular
Groove, shear pin is cut under hydraulic action, drive displacement sliding sleeve is together descending to open fluid course corresponding with this layer, and lower line-spacing
From the backwash erosion in view of fluid；
It is machined with the annular groove of different length in above-mentioned displacement sliding sleeve upper end according to the difference of rank, the annular in displacement sliding sleeve
Slot length divides claw land length to correspond with claw type displacement, and all subordinate's claw type displacement sliding sleeves can pass through its above rank
Displacement sliding sleeve；
The length of above-mentioned claw type displacement sliding sleeve takes into full account its applicability in horizontal well, when not being corresponding by itself
Displacement sliding sleeve when, lower end targeting part when having been introduced into lower contact internal diameter, upper end still have partial-length be located at displacement cunning
In set, it is ensured that passed through after centering；
The above-mentioned other minimum diameter size of infinite stages sliding sleeve arbitrary number of level is identical.
Embodiment 4：As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, this infinite stages sliding sleeve is by box cupling 1, body 2, displacement
Sliding sleeve 3, the first O-ring seals 4, sliding sleeve shear pin 5, lock ring 6, the second O-ring seals 7, fixing screws 8, lower contact 9, claw type
Displacement ball seat 10, ball sealer 11, v-ring 12, spacer ring 13, it is oriented to the grade of retainer ring 14 composition.
As shown in figure 1, the present invention enter well when state be box cupling under connect body, be provided with body symmetrical three it is oval
Hole, body internal diameter bottom are machined with symmetrical grooves, and body is built with the displacement sliding sleeve with sealing ring by external seal in slotted hole, position
Move upper end in sliding sleeve and be machined with the annular groove that length is H, be machined with discontinuous annular groove on the external diameter of lower end, groove is built with opening
Boss lock ring, displacement sliding sleeve are fixed with body by shear pin.Lower contact of the body lower end connection equipped with sealing ring, box cupling and lower contact
For tubing round thread.Lock ring has a bidirectional locking function, should rotate an angle in position shown in Fig. 1 displacement sliding sleeves during installation, make
The boss of lock ring avoids the groove on body, again rotates displacement sliding sleeve to position shown in Fig. 1 after boss crosses groove.
As shown in Fig. 2 when fracture acidizing is handled, put into from bottom to top by 10~14 sealing displacement mechanisms formed, and it is low
Discharge capacity pumps, when the boss of L length reaches the H size grooves of corresponding level, due to now L ＜ H, in the case where dividing claw elastic force to act on
L is embedded into H, and the whole displacement mechanism that seals just has been hung on displacement sliding sleeve, and v-ring seals displacement sliding sleeve endoporus, continues
Pumps hydraulic is changed into downward Axial Loads on sliding sleeve shear pin herein, when axial load caused by hydraulic pressure reaches sliding
The shear force shear pin of set shear pin is cut, and sealing displacement mechanism drives displacement sliding sleeve simultaneously descending, opens acid fracturing passage, when
Groove is embedded in along radial development under elastic force effect when bound lock ring boss reaches intrinsic groove, will be in addition to ball sealer
Sealing displacement mechanism be locked in current location.
The present invention is in the case where realizing unlimited classification, and the internal diameter of fluid course is consistent, not to sacrifice internal diameter as generation
Valency.It is realized in infinite stages：As L ＞ H（See Fig. 6）When sealing displacement mechanism would not be tangled and be continued traveling downwardly, until L
＜ H（See Fig. 5）Claw type displacement ball seat can just act to displacement sliding sleeve, according to this principle, if this grade of H is designed as 15, L by us
10 are designed as, and, is 110, L 105 to 20 grades of H with 5 mm incrementally.
Seen with external staged fracturing segmentation series, general 0.125in（3.175mm）For one-level, minimum diameter 1.25in
（31.75mm）, according to be 2 7/8in × 5.5mm specification oil pipes, maximum can only be discharged to 52. 5mm（Ball is bigger than ball seat
0.25in is 6.35mm）That is, by so arrangement, 6.5 grades can only be discharged in 2 7/8in × 5.5mm specification oil pipes, most
More 7 grades, and the present invention is not influenceed then by pipe aperture.
In order to complete the acid fracturing operation of system, it is necessary to used with tool combinations such as supporting oil, gas well packers.
The present invention is generally installed between two packers.
Above technical characteristic constitutes highly preferred embodiment of the present invention, and there is stronger adaptability and optimal implementation to imitate for it
Fruit, its technical characteristic can be increased and decreased according to being actually needed, to meet different demands.
The course of work of the present invention is as follows：Before using the present invention, the processing number of plies for the well that should clearly construct first, so
Subtract 1 on the basis of the number of plies afterwards and exactly need the quantity of the present invention prepared（Different according to packer setting mode also can the present invention
It is identical with the processing number of plies）, confirm H, L correspondingly-sizeds and order at different levels, pipe aperture is more than displacement sliding sleeve internal diameter, and should not have straight
Step.Successively close to the position of the lower packet access present invention and anchoring device between two packers, with oil pipe by pipe string tripping in
In well, set packer after production tree is installed, subsequently into acid fracturing program.When needing to open one layer of oil pipe passage,
Put into sealing displacement mechanism including ball sealer including from oil pipe, low discharge capacity pumping by after above sliding sleeves at different levels in place, claw type
Valve boss is divided to be embedded into displacement sliding sleeve annular groove on displacement ball seat, v-ring seals up displacement sliding sleeve, now on oil pipe
There is no fluid course, the result that pump works on is exactly hydraulic pressure rise, and is changed into downward Axial Loads herein and exists
On sliding sleeve shear pin, the shear force shear pin that sliding sleeve shear pin is reached when axial load caused by hydraulic pressure is cut, and seals displacement mechanism
Drive displacement sliding sleeve simultaneously it is descending, open acid fracturing passage, when bound lock ring boss reach intrinsic groove when
Groove is embedded in along radial development under elastic force effect, the sealing displacement mechanism in addition to ball sealer is locked in current location, due to every
Mouth well has several intervals, and acid fracturing is finished when carrying out the row of returning or production, and every layer of ball sealer is likely to by liquid stream
With up, the outside dimension of conventional seals ball is more than claw type displacement ball seat internal diameter, has locking mechanism to be just unlikely to make sealing
It is up and close production liquid passage that top dome sealing displacement mechanism, and seals displacement mechanism lower end and be designed with extension claw-like structures, i.e.,
Ball sealer is moved to this also has enough equivalent aeras to pass through liquid stream.Will be more perfect according to solvable ball sealer technology.
Input seals displacement mechanism successively from bottom to top, by the above process the successively row of returning, operation after acid fracturing.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of infinite stages sliding sleeve, it is characterised in that by box cupling, body, displacement sliding sleeve, the first O-ring seals, sliding sleeve shear pin, lock
Ring, the second O-ring seals, fixing screws, lower contact, claw type displacement ball seat, ball sealer, v-ring, spacer ring and guiding are fixed
Ring group into；
State when entering well is to connect body under box cupling, there is displacement sliding sleeve, the connection lower contact of body lower end in body；
It is provided with three slotted holes on body, portion there are some discontinuous annular grooves on the lower in body；
Displacement sliding sleeve is housed, upper and lower ends have the first O-ring seals, the 2nd O shapes respectively outside displacement sliding sleeve when entering well in body
Sealing ring, there is discontinuous annular groove under the second O-ring seals of displacement sliding sleeve bottom, displacement sliding sleeve is consolidated with body by sliding sleeve shear pin
Fixed, displacement sliding sleeve internal diameter bottom has grooving to be easy to use instrument along the circumferential direction to rotate it；
There is an annular groove for classification in the top portion of displacement sliding sleeve internal diameter, only changes the axial length of annular groove without changing during classification
Other sizes；
Body, by being threadedly coupled, the sealing of the second O-ring seals, connects body by fixing screws and prevented with lower contact with lower contact
Turn, lock ring is arranged between body and displacement sliding sleeve；Lock ring is housed outside displacement sliding sleeve lower end；
Ball sealer, claw type displacement ball seat, v-ring, spacer ring and be oriented to fixed ring group into sealing gearshift.
2. a kind of infinite stages sliding sleeve according to claim 1, it is characterised in that from the sealing gearshift of oil pipe input
The length for the claw type displacement ball seat outer lug boss that is open corresponds with the annular groove length in displacement sliding sleeve, only works as land length
Boss can just be embedded into groove during less than groove length；
The equivalent aera passed through in oil pipe in input sealing gearshift above liquid stream is identical.
A kind of 3. infinite stages sliding sleeve according to claim 1, it is characterised in that the discontinuous annular groove in displacement sliding sleeve bottom
Elastic lock ring that be inside provided with opening, that external diameter locally protrudes, the lock ring is extruded by body internal diameter during installation, local projection
The discontinuous groove avoided on body can load, and cross after projection and discontinuous groove are gone into same axis after discontinuous groove
Shear pin is fixed, and when sliding sleeve shear pin lock ring set by cutting displacement slide strips and comes downwards to discontinuous groove during work, lock ring opens by elastic force,
Boss is embedded into discontinuous groove, and input part is lockable in addition to ball sealer, avoids partly above pushing away because output liquid stream will be put into
Close liquid outlet channel.
4. a kind of infinite stages sliding sleeve, including body（2）, it is characterised in that the infinite stages sliding sleeve also includes：
Displacement sliding sleeve（3）, the displacement sliding sleeve（3）Installed in the body（2）It is interior, and the displacement sliding sleeve（3）Inwall on
It is provided with annular groove；
Gearshift is sealed, the sealing gearshift puts into the displacement sliding sleeve（3）It is interior, and the sealing gearshift is outer
Side is provided with boss；
Wherein, the gearshift that seals is from the displacement sliding sleeve（3）It is interior descending, and when the sealing gearshift moves to it
During the boss position relative with the annular groove, if the height of the boss is more than the displacement sliding sleeve（3）On it is described
The height of annular groove, the sealing gearshift is in the displacement sliding sleeve（3）Inside continue traveling downwardly；If the sealing gearshift
The height of the boss is less than the displacement sliding sleeve（3）The annular groove height, the boss is embedded in the annular groove
So that the sealing gearshift hangs over the displacement sliding sleeve（3）On.
5. infinite stages sliding sleeve according to claim 4, it is characterised in that the displacement sliding sleeve（3）On be provided with multiple institutes
State annular groove, the multiple annular groove is along the displacement sliding sleeve（3）It is axial arranged；When the sealing gearshift moves down into it
The boss and the displacement sliding sleeve（3）The relative position of an annular groove, and the height of the boss is less than therewith
During the height of the relative annular groove, the boss is embedded in the annular groove.
6. infinite stages sliding sleeve according to claim 5, it is characterised in that be provided with multiple institutes on the sealing gearshift
Boss is stated, and the multiple boss is set correspondingly with the multiple annular groove.
7. infinite stages sliding sleeve according to claim 4, it is characterised in that the infinite stages sliding sleeve also includes sliding sleeve shear pin
（5）, the displacement sliding sleeve（3）Pass through the sliding sleeve shear pin（5）It is fixed on the body（2）On.
8. infinite stages sliding sleeve according to claim 7, it is characterised in that the displacement sliding sleeve（3）Outer wall on be provided with
Mounting groove, lock ring is installed in the mounting groove（6）, and the body（2）Inwall on be provided with lock slots；When the displacement
Sliding sleeve（3）Pass through the sliding sleeve shear pin（5）It is fixed on the body（2）When upper, the lock ring（6）It is connected to the body（2）
Inwall on；When the sliding sleeve shear pin（5）After cutting, the displacement sliding sleeve（3）With the lock ring（6）Move down until described
Lock ring（6）The remote displacement sliding sleeve（3）One end be embedded in the lock slots so that the displacement sliding sleeve（3）It is fixed on institute
State body（2）On.
9. a kind of process of infinite stages sliding sleeve, uses infinite stages sliding sleeve, it is characterised in that the infinite stages sliding sleeve is right
It is required that the infinite stages sliding sleeve any one of 1 to 8, the process of the infinite stages sliding sleeve contains following steps；
The processing number of plies of construction well is determined first, then subtracts 1 on the basis of the number of plies and exactly need the infinite stages sliding sleeve prepared
Quantity, confirm the length H of annular grooves at different levels, divide the length L correspondingly-sizeds of valve boss and each on claw type gearshift
The access of level infinite stages sliding sleeve and the order of sealing displacement mechanism input, pipe aperture is more than displacement sliding sleeve internal diameter, and should not have
Straight step；
The infinite stages sliding sleeve and anchoring device are accessed close to the position of lower packet between two packers successively, will be managed with oil pipe
String G.I.H, installs set packer after production tree, subsequently into acid fracturing program；
When needing to open one layer of oil pipe passage, from sealing displacement mechanism of the oil pipe input including ball sealer, low displacement pump
Send by place, dividing valve boss to be embedded into corresponding displacement sliding sleeve ring described on the claw type gearshift after sliding sleeves at different levels above
In shape groove, v-ring seals up displacement sliding sleeve, does not have fluid course on oil pipe now, and the result that pump works on is exactly
Hydraulic pressure raises, and is changed into downward Axial Loads herein on sliding sleeve shear pin, when axial load reaches caused by hydraulic pressure
Shear force shear pin to sliding sleeve shear pin is cut, and sealing displacement mechanism drives displacement sliding sleeve simultaneously descending, is opened acid fracturing and is led to
Road, groove is embedded in along radial development under elastic force effect when bound lock ring boss reaches intrinsic groove, will be removed close
Sealing displacement mechanism outside blocking is locked in current location, and the outside dimension of conventional seals ball is more than claw type displacement ball seat internal diameter,
There is locking mechanism to be just unlikely to make ball sealer head on sealing displacement mechanism when acid fracturing finishes and carrying out the row of returning or production
It is up and close production liquid passage, and seal displacement mechanism lower end and be designed with extension claw-like structures, move to this even if ball sealer
There are enough equivalent aeras to pass through liquid stream.
A kind of 10. process of infinite stages sliding sleeve according to claim 9, it is characterised in that during fracture acidizing processing,
The pumping of low discharge capacity, when the boss of L length reaches the H size grooves of corresponding level, due to now L ＜ H, acted on dividing claw elastic force
Lower L is embedded into H, and the whole displacement mechanism that seals just has been hung on displacement sliding sleeve, and v-ring seals displacement sliding sleeve endoporus, after
Continuous pump liquid hydraulic pressure is changed into downward Axial Loads on sliding sleeve shear pin herein, when axial load reaches caused by hydraulic pressure
The shear force shear pin of sliding sleeve shear pin is cut, and sealing displacement mechanism drives displacement sliding sleeve simultaneously descending, opens acidifying pressure channel,
Groove is embedded in along radial development under elastic force effect when bound lock ring boss reaches intrinsic groove, ball sealer will be removed
Outer sealing displacement mechanism is locked in current location.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510219564.9A CN105089601B (en) | 2014-05-14 | 2015-04-30 | Infinite-stage sliding sleeve and process method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410203768 | 2014-05-14 | ||
| CN2014102037689 | 2014-05-14 | ||
| CN201510219564.9A CN105089601B (en) | 2014-05-14 | 2015-04-30 | Infinite-stage sliding sleeve and process method |
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| CN105089601A CN105089601A (en) | 2015-11-25 |
| CN105089601B true CN105089601B (en) | 2018-04-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111472759B (en) * | 2020-06-02 | 2024-09-20 | 东营市创世石油测试新技术开发有限责任公司 | High-pressure dynamic sealing device for output shaft of water injection well measuring and regulating instrument |
| CN112780227B (en) * | 2021-02-20 | 2023-06-23 | 中海油能源发展股份有限公司 | Infinite-level well cementation sliding sleeve capable of preventing cement from being solidified and assembling and operating method thereof |
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