CN103556971B - For the full-bore separate stratum fracfturing sliding sleeve of Oil/gas Well operation - Google Patents
For the full-bore separate stratum fracfturing sliding sleeve of Oil/gas Well operation Download PDFInfo
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- CN103556971B CN103556971B CN201310568414.XA CN201310568414A CN103556971B CN 103556971 B CN103556971 B CN 103556971B CN 201310568414 A CN201310568414 A CN 201310568414A CN 103556971 B CN103556971 B CN 103556971B
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Abstract
For the full-bore separate stratum fracfturing sliding sleeve of Oil/gas Well operation, the inner core that comprises and can move axially in urceolus is provided with at interior seating nipple in the mode matched with urceolus, the shear pin of location mutually and the position limiting structure of restriction inner core skidding distance is provided with between urceolus and inner core, at least one axial end portion of urceolus is with connector, and be provided with at barrel position can be through with seating nipple inner chamber pod apertures, seating nipple internal perisporium be provided with the groove structure that is intervally arranged and each groove can be crossed and with start bulb diameter and to adapt the phase step type moving structure of latus rectum; Phase step type moving structure is provided with two groups, front and back and can independently controls to start the latus rectum construction of switch that passes through of ball; On seating nipple internal perisporium, the spacing of each adjacent grooves is the non-integral multiple of latus rectum construction of switch spacing.Sliding sleeve of the present invention can realize not limitting the sliding sleeve of progression to be connected in series, the startup ball that only need drop into same size can open sliding sleeve step by step, significantly improves the reliability of construction, starts to enter down fishing tool after ball returns row and salvage, greatly simplify working procedure, improve operating efficiency.
Description
Technical field
The present invention relates in oil gas well completion operation construction equipment fracturing string realizing oil jacket annular space and be communicated with, is the full-bore separate stratum fracfturing sliding sleeve for Oil/gas Well operation concretely.
Background technology
In oil gas well completion gas testing process, by the opening action of sliding sleeve, oil jacket annular space is communicated with, to realize circulation, for the operation such as liquid, sand fracturing.In the structure of traditional oils gas well body, fracturing string is oil pipe, and fracturing string is connected with multiple downhole tools such as packer, sand blast sliding sleeve and sandblaster.Sandblaster and sliding sleeve position are fractured layer, and the quantity of sandblaster and sliding sleeve represents hop count or the progression of pressing crack construction.Before pressing crack construction, first drop into the startup ball of first floor sliding sleeve, after startup ball is caught by sandblaster, suppress packer and realize setting, by each construction section oil jacket annular isolation.After packer setting, continue to suppress, cut off the pin between sliding sleeve inner/outer tube and inner core is slided, sandblaster passage is opened, sandblaster of constructing immediately that section corresponding.Drop into the startup ball of second layer sliding sleeve correspondingly-sized after having constructed again, suppress and open to second layer sliding sleeve, the second layer of constructing, each interval of constructing so successively.Individual layer construction operation only needs a sliding sleeve, but multilayer section construction then needs to be connected in series multiple sliding sleeve on a tubing string, opens one deck from bottom to up, pressure break one deck during construction.Conventional sliding sleeve by change throw startup ball size achieve multistage several sliding sleeve, progression is higher, and minimum latus rectum is less, and therefore attainable progression is limited.In prior art, fracturing sliding bush ejector disclosed in Chinese patent 200820061922.3, basic structure is made up of urceolus, inner core, top connection, lower contact etc., can mutually slide between inner core and urceolus, there are shear pin and seal in the face of being slidably matched, urceolus is provided with liquid outlet, inner core is provided with ball seat.When needing to open sliding sleeve, from well head pitching, ball is pumped to ball seat, forms upper and lower pressure reduction, promotes sliding sleeve inner core descending, exposes urceolus liquid outlet.The startup ball of sliding sleeve and ball seat one_to_one corresponding, start bulb diameter and be greater than ball seat surface internal diameter.When adopting multistage sliding sleeve mode operation, different startup ball and ball seat surface increase step by step according to necessarily differential.Drop into successively from small to large during construction and start ball, open corresponding sliding sleeve.Because this kind of sliding sleeve limits by structure, there is multiple throttleng surface large from little change in internal diameter, can not realize full-bore, and attainable progression is few.
Along with going deep into of tight gas reservoir exploration and development, horizontal well horizontal segment is more and more longer, and sand fracturing segments gets more and more, and ten grades, 20 grades even the sliding sleeve technology of tens of grades are brought into schedule.In traditional sliding sleeve technical foundation, people are devoted to the raising of sliding sleeve performance reliability and the realization of functional diversities all the time.Patent announcement CN201738869 patent document discloses a kind of drillable ball injection sliding sleeve being applicable to horizontal well, comprise piecing devices and spring claw tube structure, overcome pitching sliding sleeve open after can not self-locking, the problem that ball seat can not bore, improves sliding sleeve functional reliability.Patent announcement CN202325456U discloses a kind of sliding sleeve staged fracturing sliding sleeve, and the ball seat of sliding sleeve core is inverted cone surface, is provided with and the chamfering conical surface of ball seat inverted cone surface with the conical surface below top connection screw buckle, improves the erosive wear resistance of ball seat surface.Patent announcement CN101265792A discloses a kind of hydraulic switch sliding bush, realizes the Push And Release of sliding sleeve by arranging different hydraulic cylinders on sliding sleeve, provides a kind of hydraulic switch sliding bush realizing repeat switch in ground applying hydraulic coupling.
Above-mentioned prior art, by improving the structure of traditional pitching sliding sleeve, improves sliding sleeve service behaviour and multifunction, but fails to solve the requirement to tubing string full-bore, more multistage number in current multistage subsection fracturing technique.
" the Oil/gas Well multiple zone completion System and method for " of US Patent No. 7387165 discloses a kind of staged fracturing sliding sleeve technology, fracturing sliding bush is connected to sleeve pipe enter up and down, by throwing dartlike weapon or ball open sliding sleeve step by step after well cementation, because adjacent valve has hydraulic control lines to be connected, time lower valve is opened, pressure is delivered to a valve, piston press C type ring, at this moment go up a valve to be ready to receive next dartlike weapon, dartlike weapon or ball can isolate bottom interval after taking a seat.Adopt this kind of sliding sleeve can realize more limit progression, but need lower to contact with bore hole to sleeve pipe is outer due to hydraulic control lines, control pipeline may be compromised, and there is sliding sleeve and not to open, lose the risk of fractured interval.
Summary of the invention
The invention provides a kind of full-bore separate stratum fracfturing sliding sleeve for Oil/gas Well operation, can realize not limitting the full-bore sliding sleeve of progression to be connected in series, avoid conventional stage differential style sliding sleeve throw different size start ball time maloperation, improve construction reliability.
The basic structure of the full-bore separate stratum fracfturing sliding sleeve for Oil/gas Well operation of the present invention, that the mode matched with urceolus is provided with the seating nipple comprising the inner core that can move axially in tube inner chamber outside, the shear pin of location mutually and the position limiting structure of restriction inner core skidding distance is provided with between urceolus and inner core, at least one axial end portion of urceolus with connector, and be provided with at the barrel position of urceolus can be through with seating nipple inner chamber pod apertures.Wherein:
A. on the inner peripheral surface of seating nipple, be provided with the groove structure of the equidistantly arrangement that is intervally arranged, is preferably vertically and be provided with ordinatedly with it can to cross the displacement vertically of each groove structure mode successively, and have and start ball and to be adapted by diameter the phase step type moving structure of latus rectum;
B. independent radial stretch/shrink can be made to control to start the latus rectum construction of switch of ball by latus rectum opening and closing in two groups, the front and back being provided with axially spaced-apart on phase step type moving structure under coordinating with said inner core side face groove structure.Said this often can be made independent radial stretch/shrink in group and be at least one to control startup ball by the quantity of the latus rectum construction of switch of latus rectum opening and closing, and can suitably increase as required, wherein preferably to make often to organize in latus rectum construction of switch at least three of spaced set in the circumferential, to make its stressed retainable equilibrium as far as possible on sagittal plane;
C. on said seating nipple inner peripheral surface, the spacing of each adjacent grooves structure is the non-integral multiple of said latus rectum construction of switch axial spacing, make two groups, the front and back construction of switch on said phase step type moving structure can be in the different mated condition from said groove structure respectively at synchronization, to realize the difference ON/OFF of non-concurrent.Wherein, said this non-integral multiple be preferably 0.5 ~ 1.5 non-integral multiple.
Said seating nipple in the present invention's above-mentioned full-bore separate stratum fracfturing sliding sleeve, according to circumstances can have different structure choice forms.Such as, a kind of structure can be similar with traditional approach, makes this seating nipple be just all directly the inner core being engaged in the overall structure form in outer tube inner chamber with slotted mode, and be respectively equipped with top connection and lower contact at the axial two ends of urceolus; Saidly the pod apertures through with seating nipple inner chamber can be arranged on the inlet side position of urceolus axis at urceolus barrel position.
Adopt above-mentioned be all the seating nipple of overall structure inner core form time, for use nothing the row of returning requirement startup ball, particular/special requirement be there is no to the seating nipple structure of said structure; When using need conventional at present to return the startup ball of row, then first and second groove structure of this seating nipple inner peripheral surface upper end (namely starting ball entrance point), the spacing equal with the two groups of latus rectum construction of switch axial spacings in front and back in said phase step type moving structure should be had, when being pushed out to import so that startup ball can be driven oppositely to exit, the two groups of constructions of switch in front and back can be opened simultaneously, and startup ball can be exited smoothly by exporting.
Said seating nipple except can adopt above-mentioned be all overall structure inner core form except, can also adopt by the form be jointly made up of with at least one joint connecting cylinder that can be connected with urceolus entrance point said inner core, and at least on the inner peripheral surface of connecting cylinder, be provided with the said groove structure be intervally arranged, the inner peripheral surface of inner core then can be with or without this groove structure said; Axial opposite end between inner core and adjacent segments connecting cylinder can contact with each other linking.Now general need be provided with lower contact at the port of export of urceolus, and the pod apertures that said urceolus barrel position can be through with seating nipple inner chamber is then arranged on the junction place of inner core and adjacent segments connecting cylinder.The quantity of this connecting cylinder, can need to select according to the progression of construction.
The course of work of the fracturing string that the present invention is connected in series by the sliding sleeve of multiple above-mentioned form is: when needing the sliding sleeve opening orlop (i.e. far-end), after dropping into startup ball from entrance point, the front group of latus rectum construction of switch being arranged in the phase step type moving structure of the superiors' seating nipple is positioned at outside the groove of seating nipple inner peripheral surface, then organize the groove that latus rectum construction of switch is then positioned at seating nipple inner peripheral surface, startup ball is organized latus rectum construction of switch and is stopped before phase step type moving structure.Under the chock pressure difference effect that pumping pressure makes the front and back of startup ball be formed, start ball promotion phase step type moving structure is moved forward, front group of latus rectum construction of switch of phase step type moving structure is made to move forward and fall in the groove in its front, namely the latus rectum starting ball front is opened, rear group of latus rectum construction of switch then shifts out groove simultaneously and drops on outside the groove in its groove front, original place and be closed, and starts ball and namely have passed this phase step type moving structure and continues to move ahead.So achieve and send into a startup ball by import, can promote each phase step type moving structure moves ahead once, until the phase step type moving structure of forefront is pushed into seating nipple foremost after groove, front group of latus rectum construction of switch of this phase step type moving structure is just because forever closing without enterable groove, startup ball is made to stop moving ahead, the inner chamber of clogging seating nipple, the promotion pressure constantly increased by pumped slurry acts on, seating nipple is finally made to cut off shear pin, move ahead vertically in urceolus, and original place is opened in the pod apertures be closed, the particle loaded fluid of the pumping in seating nipple is outwards sprayed from pod apertures.
When making startup ball return row, dropping on bottom (far-end) and having started ball under the promotion of reverse slurries, having coordinated with phase step type moving structure, done returning of above-mentioned reverse and retire dynamic, move to upper end enter oral area until start ball.If now the spacing of first and second groove structure of seating nipple side face upper end is equal with two groups, the front and back latus rectum construction of switch axial spacing in said phase step type moving structure, two groups, the front and back latus rectum construction of switch in phase step type moving structure then can be made to fall into these two groove structures be respectively simultaneously open simultaneously, the startup ball of the row of returning can be exited smoothly without the need to any fishing tool.
The said groove structure that seating nipple inner peripheral surface is arranged, can have the selection of various ways, and as being the independent annular groove of radially circumference setting, can be included on radial circumference is continuous print annular groove, or the groove etc. of discontinuous.In addition, this groove structure also can be the continous way helicla flute with circumferential position limiting structure arranged along the hand of spiral, or along the discontinuous groove of the hand of spiral.
In above-mentioned phase step type moving structure, a kind of form that two groups, the front and back latus rectum construction of switch of said axially spaced-apart can be selected is rolling structure.Wherein one can preferred form, each rolling structure is separately positioned on the spin in taper type through hole radial through on phase step type moving structure, the medial aperture of taper type through hole, be less than the diameter that aperture, outside is also less than said spin simultaneously, the radial outside aperture of taper type through hole is consistent with the groove width of said groove structure.When after the groove that spin falls on seating nipple inner peripheral surface, the ball top of its radially inner side and the medial aperture of indentation taper type through hole, namely latus rectum construction of switch is in open mode, allows to start ball and passes through; When spin shifts out outside the groove on seating nipple inner peripheral surface, namely the ball top of its radially inner side pushes up convex outside the medial aperture of taper type through hole, namely latus rectum construction of switch is in closed condition, stop and start ball and pass through, and the through taper type through hole of this radial direction can ensure again this spin can remain in this through hole unlikely deviate from.
In addition, the latus rectum construction of switch of said rolling structure form, can also be adopted as the form of the two groups of roller structures in front and back that the syndeton through being articulated with on phase step type moving structure is arranged.
Two groups, the front and back latus rectum construction of switch of axially spaced-apart on said phase step type moving structure, can also be adopted as two groups, the front and back bullet pawl structure be connected to through elastic construction respectively on phase step type moving structure.In or beyond groove structure, being made the change of spin latus rectum by two groups of bullet pawl structures, realizing clearance or stop to starting ball.
Further, two groups, the front and back latus rectum construction of switch of this axially spaced-apart on phase step type moving structure, above-mentioned spin and bullet pawl structure can also be combined, such as, group latus rectum construction of switch is rolling structure before making, and then organizes, and is adopted as the bullet pawl structure etc. be connected to through elastic construction on phase step type moving structure.
Be appreciated that thus, the above-mentioned form of the present invention is used for the full-bore separate stratum fracfturing sliding sleeve of Oil/gas Well operation, can realize not limitting the sliding sleeve of progression to be connected in series, and the startup ball that only need drop into same size can realize opening sliding sleeve at different levels step by step successively, avoid conventional stage differential style sliding sleeve throw different size start ball time incident maloperation, significantly improve the reliability of construction.When needing the row of returning to start ball, startup ball can oppositely move to import department in the same fashion and automatically discharge, and without the need to by any fishing tool, greatly simplify working procedure, improves operating efficiency.
Below in conjunction with the detailed description of the invention of embodiment, foregoing of the present invention is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following example.Without departing from the idea case in the present invention described above, the various replacement made according to ordinary skill knowledge and customary means or change, all should comprise within the scope of the invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1 full-bore separate stratum fracfturing sliding sleeve.
Fig. 2 starts the schematic diagram that ball stopped by front group of latus rectum construction of switch in Fig. 1.
Fig. 3 starts the schematic diagram that ball stopped by rear group of latus rectum construction of switch in Fig. 1.
Fig. 4 starts the schematic diagram of ball by sliding sleeve in Fig. 1.
Fig. 5 is the schematic diagram that the least significant end of Tu1 subordinate sliding sleeve is stopped by rear group of latus rectum construction of switch.
Fig. 6 is the schematic diagram after Fig. 5 cuts off shear pin.
Fig. 7 is that Fig. 1 returns row's startup ball schematic diagram.
Fig. 8 is the schematic diagram that the startup ball of the embodiment of the present invention 2 is stopped by front group of latus rectum construction of switch.
Fig. 9 is the schematic diagram that the startup ball of the embodiment of the present invention 2 is stopped by rear group of latus rectum construction of switch.
Figure 10 is that the row of returning of the embodiment of the present invention 2 starts ball schematic diagram.
Figure 11 is the schematic diagram that the startup ball of the embodiment of the present invention 3 is stopped by front group of latus rectum construction of switch.
Figure 12 is the schematic diagram that the startup ball of the embodiment of the present invention 3 is stopped by rear group of latus rectum construction of switch.
Figure 13 is that the row of returning of the embodiment of the present invention 2 starts ball schematic diagram.
Figure 14 is the structural representation of the another kind of full-bore separate stratum fracfturing sliding sleeve of the embodiment of the present invention 4.
Detailed description of the invention
embodiment 1
Shown in Fig. 1 is a kind of form of structure of the present invention for the full-bore separate stratum fracfturing sliding sleeve of Oil/gas Well operation.Be connected at axial two ends in the urceolus 2 of top connection 1 and lower contact 7, be combined with the seating nipple of overall structure form inner core 5 structure can making axial slip, be provided with the shear pin 6 of mutually locating and the position limiting structure limiting inner core skidding distance between inner core 5 and urceolus 2, the barrel position above urceolus 2 is provided with through pod apertures 4.Wherein:
The inner peripheral surface of a. inner core 5 is provided with equally spaced groove structure 11 vertically, and described groove structure 11 is the radially groove of continous way (or discontinuous) that arranges of circumference.Be provided with ordinatedly with groove structure 11 can have to cross each groove structure 11 mode successively along inner tube wall axial displacement and start ball 14 and to be adapted by diameter the phase step type moving structure 8 of latus rectum;
B. independent radial stretch/shrink can be made to control to start the latus rectum construction of switch 9,10 of ball 14 by latus rectum opening and closing in two groups, the front and back being provided with axially spaced-apart on phase step type moving structure 8 under coordinating with said inner core side face groove structure 11.Latus rectum construction of switch 9,10 along in inner core inner circumferential preferably spaced set have at least three.Two groups, described front and back latus rectum construction of switch 9,10 are rolling ball structure respectively.Each group of rolling ball structure is all arranged in taper type through hole radial through on phase step type moving structure 8, the medial aperture of taper type through hole is less than aperture, outside, and being less than the diameter of said spin simultaneously, the radial outside aperture of taper type through hole is consistent with the groove width of said groove structure 11;
C. the row of returning smoothly during type startup ball is dissolved for adaptation use is non-, except first and second groove structure 20 of inner core 5 inner peripheral surface upper end, two groups, front and back latus rectum construction of switch 9 in the spacing of 21 and said phase step type moving structure 8, outside two groups, the front and back roller axial spacing of 10 is equal, the spacing of all the other each adjacent grooves structures 11 can select said latus rectum construction of switch 9, and before and after 10, two groups of roller axial spacings 0.5 ~ 1.5 is non-integral multiple.
Between sliding sleeve inner core 5 and sliding sleeve urceolus 2, be provided with at least one sealing ring 3, pressure break mortar can not be flowed between inner core 5 and urceolus 2, causing inner core 5 to be stuck can not glide.The set-up mode of inner core 5 side face groove structure 11 can adopt:
Mode one: according to required sliding sleeve progression, the inner core 5 of sliding sleeve at different levels is provided with the groove structure 11 that quantity at least equals sliding sleeve progression, phase step type moving structure 8 is placed on inner core 5 groove structure 11 position of corresponding progression sliding sleeve.Such as, if need 20 grades of sliding sleeves, the inner core 5 of whole sliding sleeve is all processed 21 groove structures 11, the phase step type moving structure 8 of most final stage sliding sleeve is placed on last, two groove location of this final stage sliding sleeve inner core 5 end, and the phase step type moving structure 8 of penultimate stage sliding sleeve is placed on inverse two, three groove location of penultimate stage sliding sleeve inner core 5 end ... top one, two groove location of most higher level's sliding sleeve inner core 5 is placed on successively to the phase step type moving structure 8 of most upper level sliding sleeve;
Mode two: according to total progression of sliding sleeve, the inner core 5 of sliding sleeve at different levels is processed the groove structure 11 of respective numbers, as: be provided with two grooves in the sliding sleeve inner core 5 of most final stage (far-end), in penultimate stage sliding sleeve inner core 5, process three grooves ... most higher level's sliding sleeve inner core 5 processes 21 grooves.And each phase step type moving structure 8 is placed on one, two groove location of sliding sleeve inner cores 5 at different levels end suitable for reading.
Its course of work is as shown in Fig. 2 ~ Fig. 7.When needing the sliding sleeve opening most subordinate (shown in Fig. 2), drop into from the sliding sleeve top connection 1 of most higher level and start ball 14, the spin of front group of latus rectum construction of switch 9 of the phase step type moving structure 8 now in most higher level's sliding sleeve inner core 5 is positioned at outside the groove of inner core 5 inner peripheral surface, and the roller of rear group of latus rectum construction of switch 10 is positioned at the groove of inner core 5 inner peripheral surface.Start after ball 14 is pumped into and namely stopped by the spin organizing latus rectum construction of switch 9 before outside inner core 5 inner peripheral surface groove.
As shown in Figure 3 and Figure 4, along with the increase of pumped slurry pressure, startup ball 14 is made to drive phase step type moving structure 8 to move forward vertically at the chock pressure difference formed up and down starting ball 14, the spin of front group of latus rectum construction of switch 9 of phase step type moving structure 8 moves forward and falls in the groove structure 11 in its front and opened by latus rectum, the spin of rear group of latus rectum construction of switch 10 then shifts out the groove structure 11 at its former place, be in outside groove structure 11, latus rectum is closed, the latus rectum construction of switch 9 that startup ball 14 can be opened by front group discharges, and is moved ahead by continuation pumping.Meanwhile, this phase step type moving structure 8 has also moved ahead a step thereupon.In the same fashion, each phase step type moving structure 8 can passing through with the follow-up each startup ball dropped into successively, also moves ahead successively simultaneously.Impaired by being clashed into by property at parts of edges and corners during inner core 5 for avoiding starting ball 14, be provided with the spigot surface 12 of toe-in in the end latus rectum portion of sliding sleeve inner core 5, and also can play guide effect simultaneously, make startup ball 14 by more smooth.Start ball 14 by after sliding sleeve at the corresponding levels, continue in the same fashion to lead to subsequent stages sliding sleeve successively, and drive the phase step type moving structure 8 in sliding sleeve at different levels to move ahead successively successively, until the phase step type moving structure 8 in most final stage sliding sleeve supports the bottom to inner core 5.
As shown in Figure 5, because the phase step type moving structure 8 in most final stage sliding sleeve is positioned at the least significant end of this grade of sliding sleeve inner core 5 groove, through starting the promotion of ball 14, making the confined planes 13 of phase step type moving structure 8 contact spacing with the bottom surface of inner core 5, cannot continue to move ahead.
In figure 6, under the pressure effect of particle loaded fluid continuing pumping, make phase step type moving structure 8 continue to exert pressure to inner core 5, finally make inner core 5 cut off shear pin 6 and forward slip, the diversion space 18 of inner core 5 is opened with the pod apertures 4 on urceolus 2 is through.
As shown in Figure 7, by when starting ball 14 row of returning, need can utilize the pressure of formation fluid, make startup ball 14 with above-mentioned contrary process, drive each phase step type moving structure 8 oppositely progressively to move to the input import department starting ball.Due to two groups, the front and back latus rectum construction of switch 9 in the first groove 20 of inner core 5 side face upper end (import) and the spacing of the second groove structure 21 and phase step type moving structure 8, the axial spacing of 10 is equal, therefore two groups, the front and back latus rectum construction of switch 9 of phase step type moving structure 8 can be made, 10 fall into first and second groove structure 20 of inner core 5 side face upper end in inner core upper end import department simultaneously, open in 21 simultaneously, the startup ball 14 of the row of returning unhinderedly is discharged smoothly, without the need to salvaging by fishing tool.
embodiment 2
Fig. 8 ~ Figure 10 is the structure of the overall structure form inner core 5 form of structure seating nipple of another kind of form of structure.The difference of itself and embodiment 1 is, two groups, the front and back latus rectum construction of switch 9,10 of axially spaced-apart on phase step type moving structure 8, is two groups, the front and back bullet pawl structure 16,17 be connected to through elastic construction 15 on phase step type moving structure 8 respectively.
After dropping into from most higher level's sliding sleeve and starting ball 14, front group of bullet pawl structure 16 of the phase step type moving structure 8 now in most higher level's sliding sleeve inner core 5 is positioned at outside the groove structure 11 of inner core 5 inner peripheral surface, and rear group of bullet pawl structure 17 is positioned at the groove structure 11 of inner core 5 inner peripheral surface.Namely such startup ball 14 is played pawl structure 16 by group before outside inner core 5 inner peripheral surface groove after dropping into and being pumped into stops.
As shown in Figure 9, because pumping pressure is large, start the chock pressure difference of formation up and down of ball 14, start under differential pressure action ball 14 drive before group play the spacing that pawl structure 16 and whole phase step type moving structure 8 move down half groove on inner core 5, front group of bullet pawl structure 16 of phase step type moving structure 8 is moved down to be fallen in described groove structure 11, rear group of bullet pawl structure 17 shifts out groove structure 11 downwards, drop on outside groove structure 11, such startup ball 14, by front group of bullet pawl structure 16, is stopped by rear group of bullet pawl structure 17.
Again by same principle, phase step type moving structure 8 moves down half flute pitch again, and before making, group plays pawl structure 16 and drops on outside groove structure 11, and rear group of bullet pawl structure 17 falls in groove structure 11, starts ball 14 and is released, until enter in most subordinate sliding sleeve.Open each sliding sleeve step by step in the manner of example 1 again.
As shown in Figure 10, when the row of returning starts ball 14, start ball 14 by the principle of phase step type moving structure 8 with drop into that to start ball 14 identical, can drive during each startup ball 14 row of returning the phase step type moving structure 8 of process to move up groove structure 11 spacing.Due to two groups, the front and back bullet pawl structure 16 in the first groove 20 of inner core 5 side face upper end and the spacing of the second groove structure 21 and phase step type moving structure 8, the axial spacing of 17 is equal, therefore two groups, the front and back bullet pawl structure 16 of phase step type moving structure 8,17 can fall into first and second groove structure 20 of inner core 5 side face upper end when arriving inner core 5 top simultaneously, in 21, any stop would not being had to the startup ball 14 of the row of returning like this, startup ball 14 can being made smoothly by discharging after sliding sleeve.
embodiment 3
This example is simultaneously in conjunction with the above-mentioned a kind of structure of overall structure form inner core 5 form of structure seating nipple stated embodiment 1 and state an embodiment 2.
As shown in figure 11, two groups, the front and back latus rectum construction of switch 9 of axially spaced-apart on this phase step type moving structure 8, in 10, front group is rolling structure 23, and rear group is the bullet pawl structure 17 be connected to through elastic construction 15 on phase step type moving structure 8.
After dropping into from most higher level's sliding sleeve and starting ball 14, the rolling structure 23 of the phase step type moving structure 8 now in most higher level's sliding sleeve inner core 5 is positioned at outside the groove structure 11 of inner core 5 inner peripheral surface, and rear group of bullet pawl structure 17 is positioned at the groove structure 11 of inner core 5 inner peripheral surface.Namely such startup ball 14 is organized rolling structure 23 before outside inner core 5 inner peripheral surface groove after dropping into and being pumped into and is stopped.
As shown in figure 12, because pumping pressure is large, start the chock pressure difference of formation up and down of ball 14, start under differential pressure action and before ball 14 drives, to organize the spacing that rolling structure 23 and whole phase step type moving structure 8 move down half groove on inner core 5, front group of rolling structure 23 of phase step type moving structure 8 is moved down to be fallen in described groove structure 11, rear group of bullet pawl structure 17 shifts out groove structure 11 downwards, drop on outside groove structure 11, such startup ball 14, by front group of rolling structure 23, is stopped by rear group of bullet pawl structure 17.
Move down half flute pitch again by same principle phase step type moving structure 8 again, before making, group rolling structure 23 drops on outside groove structure 11, and rear group of bullet pawl structure 17 falls in groove structure 11, starts ball 14 and is released, until enter in most subordinate sliding sleeve.Open each sliding sleeve step by step in the manner of example 1 again.
As shown in figure 13, when the row of returning starts ball 14, start ball 14 by the principle of phase step type moving structure 8 with drop into that to start ball 14 identical, can drive during each startup ball 14 row of returning the phase step type moving structure 8 of process to move up groove structure 11 spacing.Due to the first groove 20 of inner core 5 side face upper end and the spacing of the second groove structure 21 with in phase step type moving structure 8 before to organize rolling structure 23 equal with the axial spacing of metapedes bullet pawl structure 17, therefore front group of rolling structure 23 and the metapedes bullet pawl structure 17 of phase step type moving structure 8 can fall into first and second groove structure 20 of inner core 5 side face upper end simultaneously when arriving inner core 5 top, in 21, any stop would not being had to the startup ball 14 of the row of returning like this, startup ball 14 can being made smoothly by discharging after sliding sleeve.
embodiment 4
Shown in Figure 14 is the structure of the full-bore separate stratum fracfturing sliding sleeve of the another kind of form of structure of the present invention.Be wherein said seating nipple with the difference of embodiment 1, by the inner core 5 be engaged in slotted mode in urceolus 2 inner chamber, jointly form with at least one joint connecting cylinder 24 that can be connected with urceolus 2 entrance point vertically.Inner core 5 and the end be to axial adjacent between joint connecting cylinder 24 to be conflicted linking, mutually to make inner circumferential surface can form complete equally spaced groove structure 11.Groove structure 11 on this inner peripheral surface, can all be arranged on said connecting cylinder 24, also can all be provided with said groove structure 11 at said inner core 5 and connecting cylinder 24 simultaneously.Shown in figure is the form of the latter.Be provided with lower contact 7 at the port of export of urceolus 2, entrance point is connected with connecting cylinder 24.Pod apertures 4 that can be through with seating nipple inner chamber on urceolus 2 barrel is arranged on the corresponding position of inner core 5 and the junction of adjacent segments connecting cylinder 24.The number of connection successively of this connecting cylinder 24, can need to select according to the progression of construction.
Claims (13)
1. for the full-bore separate stratum fracfturing sliding sleeve of Oil/gas Well operation, it is characterized in that being provided with the inner core (5) that comprises and can move axially in urceolus (2) inner chamber at interior seating nipple in the mode matched with urceolus (2), the shear pin (6) of mutually locating and the position limiting structure limiting inner core (5) skidding distance is provided with between urceolus (2) and inner core (5), at least one axial end portion of urceolus (2) is with connector, and be provided with at barrel position can be through with seating nipple inner chamber pod apertures (4), wherein:
A. on the inner peripheral surface of seating nipple, being provided with the groove structure (11) that is intervally arranged vertically and being provided with ordinatedly with it can to cross the displacement vertically of each groove structure (11) mode successively, and has and start ball (14) and to be adapted by diameter the phase step type moving structure (8) of latus rectum;
B. independent radial stretch/shrink can be made to control to start the latus rectum construction of switch (9,10) of ball (14) by latus rectum opening and closing in two groups, the front and back being provided with axially spaced-apart on phase step type moving structure (8) under coordinating with the inner peripheral surface groove structure (11) of said seating nipple;
C. on said seating nipple inner peripheral surface, the spacing of each adjacent grooves structure (11) is the non-integral multiple of said latus rectum construction of switch (9,10) axial spacing.
2. full-bore separate stratum fracfturing sliding sleeve as claimed in claim 1, is characterized in that the said groove structure (11) be intervally arranged vertically on the inner peripheral surface of seating nipple is for equidistantly arrangement.
3. full-bore separate stratum fracfturing sliding sleeve as claimed in claim 1, is characterized in that the spacing of each adjacent grooves structure (11) on said seating nipple inner peripheral surface is the non-integral multiple of 0.5 ~ 1.5 of said latus rectum construction of switch (9,10) axial spacing.
4. full-bore separate stratum fracfturing sliding sleeve as claimed in claim 1, it is characterized in that said seating nipple is exactly the inner core (5) being engaged in the overall structure form in urceolus (2) inner chamber with slotted mode, be respectively equipped with top connection (1) and lower contact (7) at the axial two ends of urceolus (2), the pod apertures (4) that said urceolus (2) barrel position can be through with seating nipple inner chamber is arranged on the inlet side position of urceolus axis.
5. full-bore separate stratum fracfturing sliding sleeve as claimed in claim 4, it is characterized in that first and second groove structure (20 of the seating nipple inner peripheral surface upper end of said overall structure inner core (5) form, 21) for having and two groups of latus rectum construction of switch (9, the 10) spacing that axial spacing is equal in front and back in said phase step type moving structure (8).
6. full-bore separate stratum fracfturing sliding sleeve as claimed in claim 1, it is characterized in that said seating nipple is made up of with at least one joint connecting cylinder (24) that can be connected with urceolus (2) entrance point jointly said inner core (5), on the inner peripheral surface of connecting cylinder (24), be at least provided with the said groove structure (11) be intervally arranged, axial opposite end between inner core (5) and adjacent segments connecting cylinder (24) can contact with each other linking, lower contact (7) is provided with at the port of export of urceolus (2), said urceolus (2) barrel position can be through with seating nipple inner chamber pod apertures (4) be arranged on the junction place of inner core (5) and adjacent segments connecting cylinder (24).
7. full-bore separate stratum fracfturing sliding sleeve as claimed in claim 1, the often group latus rectum construction of switch (9,10) that it is characterized in that on said phase step type moving structure (8) is respectively at least three of spaced set in the circumferential.
8. full-bore separate stratum fracfturing sliding sleeve as claimed in claim 1, the groove structure (11) that it is characterized in that on said seating nipple (5) inner peripheral surface be the radially continous way of circumference setting or the independent annular groove of discontinuous.
9. full-bore separate stratum fracfturing sliding sleeve as claimed in claim 8, the groove structure (11) that it is characterized in that on said seating nipple (5) inner peripheral surface be the independent annular groove of the continous way of radially circumference setting.
10. full-bore separate stratum fracfturing sliding sleeve as claimed in claim 1, the groove structure (11) that it is characterized in that on said seating nipple inner peripheral surface be the continous way helicla flute with circumferential position limiting structure along hand of spiral setting, or along the discontinuous groove of the hand of spiral.
11. full-bore separate stratum fracfturing sliding sleeves as described in one of claim 1 to 10, it is characterized in that two groups, the front and back latus rectum construction of switch (9 of the upper axially spaced-apart of said phase step type moving structure (8), 10) at least one group in is rolling structure, or two groups, the front and back bullet pawl structure (16,17) be connected to through elastic construction (15) on phase step type moving structure (8).
12. full-bore separate stratum fracfturing sliding sleeves as claimed in claim 11, it is characterized in that said rolling structure is for being arranged on the spin in the upper radial through taper type through hole of phase step type moving structure (8), the medial aperture of taper type through hole, be less than the diameter that aperture, outside is also less than said spin simultaneously, the radial outside aperture of taper type through hole is consistent with the groove width of said groove structure (11).
13. full-bore separate stratum fracfturing sliding sleeves as claimed in claim 11, it is characterized in that two groups, front and back latus rectum construction of switch (9,10) of the upper axially spaced-apart of said phase step type moving structure (8) are two groups, the front and back roller structure that the syndeton through being articulated with on phase step type moving structure (8) is arranged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310568414.XA CN103556971B (en) | 2013-11-15 | 2013-11-15 | For the full-bore separate stratum fracfturing sliding sleeve of Oil/gas Well operation |
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| CN201310568414.XA CN103556971B (en) | 2013-11-15 | 2013-11-15 | For the full-bore separate stratum fracfturing sliding sleeve of Oil/gas Well operation |
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| CN103556971A CN103556971A (en) | 2014-02-05 |
| CN103556971B true CN103556971B (en) | 2016-03-02 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982167B (en) * | 2014-05-23 | 2016-10-05 | 湖南唯科拓石油科技服务有限公司 | A kind of full-bore pitching sliding sleeve staged fracturing equipment |
| US9587464B2 (en) * | 2014-10-02 | 2017-03-07 | Sc Asset Corporation | Multi-stage liner with cluster valves and method of use |
| CN106545323B (en) * | 2015-09-18 | 2019-04-05 | 中国石油化工股份有限公司 | Fracturing device for oil gas tubing string |
| BR112018014652B1 (en) | 2016-01-20 | 2023-03-21 | China Petroleum & Chemical Corporation | SLIDING GLOVE |
| CN105672943B (en) * | 2016-01-20 | 2018-07-10 | 中国石油化工股份有限公司 | A kind of full-bore sliding sleeve with solvable solution structure |
| CN109252845A (en) * | 2018-10-15 | 2019-01-22 | 中国石油集团渤海钻探工程有限公司 | A kind of solvable slide bushing assembly of separate stratum fracfturing full-bore |
| CN110984911B (en) * | 2019-12-18 | 2023-12-22 | 中国石油天然气股份有限公司 | Fracturing sliding sleeve and fracturing sliding sleeve group of oil and gas well and use method |
| CN113153218B (en) * | 2021-05-18 | 2022-12-20 | 燕山大学 | Full-bore infinite-stage fracturing sliding sleeve |
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| CN101265792A (en) * | 2008-05-09 | 2008-09-17 | 中国石油天然气集团公司 | Hydraulic switch sliding bush |
| WO2013070446A1 (en) * | 2011-11-08 | 2013-05-16 | Schlumberger Canada Limited | Completion method for stimulation of multiple intervals |
| CN203603846U (en) * | 2013-11-15 | 2014-05-21 | 中国石油化工股份有限公司 | Full-path layered fracturing sliding sleeve for oil-gas well operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265792A (en) * | 2008-05-09 | 2008-09-17 | 中国石油天然气集团公司 | Hydraulic switch sliding bush |
| WO2013070446A1 (en) * | 2011-11-08 | 2013-05-16 | Schlumberger Canada Limited | Completion method for stimulation of multiple intervals |
| CN203603846U (en) * | 2013-11-15 | 2014-05-21 | 中国石油化工股份有限公司 | Full-path layered fracturing sliding sleeve for oil-gas well operation |
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